Feat: add appflowy editor in backend (#1320)

* chore: remove update attributes

* chore: format code

* chore: extension for transaction

* refactor: add document editor trait

* chore: add appflowy_document editor

* chore: add document serde

* chore: add new document editor

* chore: add tests

* chore: add more test

* chore: add test

Co-authored-by: nathan <nathan@appflowy.io>

frontend/app_flowy/lib/plugins/doc/application/doc_bloc.dart

@@ -115,7 +115,7 @@ class DocumentBloc extends Bloc<DocumentEvent, DocumentState> {
   void _composeDelta(Delta composedDelta, Delta documentDelta) async {
     final json = jsonEncode(composedDelta.toJson());
     Log.debug("doc_id: $view.id - Send json: $json");
-    final result = await service.applyEdit(docId: view.id, data: json);
+    final result = await service.applyEdit(docId: view.id, operations: json);
 
     result.fold(
       (_) {},

frontend/app_flowy/lib/plugins/doc/application/doc_service.dart

@@ -18,13 +18,11 @@ class DocumentService {
 
   Future<Either<Unit, FlowyError>> applyEdit({
     required String docId,
-    required String data,
-    String operations = "",
+    required String operations,
   }) {
     final payload = EditPayloadPB.create()
       ..docId = docId
-      ..operations = operations
-      ..operationsStr = data;
+      ..operations = operations;
     return DocumentEventApplyEdit(payload).send();
   }
 

frontend/rust-lib/Cargo.lock

@@ -1154,6 +1154,7 @@ dependencies = [
  "claim 0.4.0",
  "claim 0.5.0",
  "fake",
+ "flowy-document",
  "flowy-folder",
  "flowy-net",
  "flowy-sdk",

frontend/rust-lib/dart-ffi/src/lib.rs

@@ -23,7 +23,7 @@ pub extern "C" fn init_sdk(path: *mut c_char) -> i64 {
     let path: &str = c_str.to_str().unwrap();
 
     let server_config = get_client_server_configuration().unwrap();
-    let config = FlowySDKConfig::new(path, server_config, "appflowy").log_filter("debug");
+    let config = FlowySDKConfig::new(path, "appflowy", server_config, false).log_filter("debug");
     FLOWY_SDK.get_or_init(|| FlowySDK::new(config));
 
     0

frontend/rust-lib/flowy-document/src/editor/document.rs

@@ -0,0 +1,99 @@
+use bytes::Bytes;
+use flowy_error::{FlowyError, FlowyResult};
+use flowy_revision::{RevisionObjectDeserializer, RevisionObjectSerializer};
+use flowy_sync::entities::revision::Revision;
+use lib_ot::core::{Body, Extension, Interval, NodeDataBuilder, NodeOperation, NodeTree, NodeTreeContext, Transaction};
+use lib_ot::text_delta::TextOperationBuilder;
+
+#[derive(Debug)]
+pub struct Document {
+    tree: NodeTree,
+}
+
+impl Document {
+    pub fn new(tree: NodeTree) -> Self {
+        Self { tree }
+    }
+
+    pub fn from_transaction(transaction: Transaction) -> FlowyResult<Self> {
+        let tree = NodeTree::from_operations(transaction.operations, make_tree_context())?;
+        Ok(Self { tree })
+    }
+
+    pub fn get_content(&self, pretty: bool) -> FlowyResult<String> {
+        if pretty {
+            serde_json::to_string_pretty(self).map_err(|err| FlowyError::serde().context(err))
+        } else {
+            serde_json::to_string(self).map_err(|err| FlowyError::serde().context(err))
+        }
+    }
+
+    pub fn get_tree(&self) -> &NodeTree {
+        &self.tree
+    }
+}
+
+pub(crate) fn make_tree_context() -> NodeTreeContext {
+    NodeTreeContext {}
+}
+
+pub fn initial_document_content() -> String {
+    let delta = TextOperationBuilder::new().insert("").build();
+    let node_data = NodeDataBuilder::new("text").insert_body(Body::Delta(delta)).build();
+    let editor_node = NodeDataBuilder::new("editor").add_node_data(node_data).build();
+    let node_operation = NodeOperation::Insert {
+        path: vec![0].into(),
+        nodes: vec![editor_node],
+    };
+    let extension = Extension::TextSelection {
+        before_selection: Interval::default(),
+        after_selection: Interval::default(),
+    };
+    let transaction = Transaction {
+        operations: vec![node_operation].into(),
+        extension,
+    };
+    transaction.to_json().unwrap()
+}
+
+impl std::ops::Deref for Document {
+    type Target = NodeTree;
+
+    fn deref(&self) -> &Self::Target {
+        &self.tree
+    }
+}
+
+impl std::ops::DerefMut for Document {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.tree
+    }
+}
+
+pub struct DocumentRevisionSerde();
+impl RevisionObjectDeserializer for DocumentRevisionSerde {
+    type Output = Document;
+
+    fn deserialize_revisions(_object_id: &str, revisions: Vec<Revision>) -> FlowyResult<Self::Output> {
+        let mut tree = NodeTree::new(make_tree_context());
+        let transaction = make_transaction_from_revisions(revisions)?;
+        let _ = tree.apply_transaction(transaction)?;
+        let document = Document::new(tree);
+        Result::<Document, FlowyError>::Ok(document)
+    }
+}
+
+impl RevisionObjectSerializer for DocumentRevisionSerde {
+    fn combine_revisions(revisions: Vec<Revision>) -> FlowyResult<Bytes> {
+        let transaction = make_transaction_from_revisions(revisions)?;
+        Ok(Bytes::from(transaction.to_bytes()?))
+    }
+}
+
+fn make_transaction_from_revisions(revisions: Vec<Revision>) -> FlowyResult<Transaction> {
+    let mut transaction = Transaction::new();
+    for revision in revisions {
+        let _ = transaction.compose(Transaction::from_bytes(&revision.bytes)?)?;
+    }
+    Ok(transaction)
+}

frontend/rust-lib/flowy-document/src/editor/document_serde.rs

@@ -0,0 +1,247 @@
+use crate::editor::document::Document;
+
+use lib_ot::core::{AttributeHashMap, Body, NodeData, NodeId, NodeTree};
+use lib_ot::text_delta::TextOperations;
+use serde::de::{self, MapAccess, Visitor};
+use serde::ser::{SerializeMap, SerializeSeq};
+use serde::{Deserialize, Deserializer, Serialize, Serializer};
+use std::fmt;
+
+impl Serialize for Document {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        let mut map = serializer.serialize_map(Some(1))?;
+        let _ = map.serialize_key("document")?;
+        let _ = map.serialize_value(&DocumentContentSerializer(self))?;
+        map.end()
+    }
+}
+
+const FIELDS: &[&str] = &["Document"];
+
+impl<'de> Deserialize<'de> for Document {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        struct DocumentVisitor();
+
+        impl<'de> Visitor<'de> for DocumentVisitor {
+            type Value = Document;
+
+            fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+                formatter.write_str("Expect document tree")
+            }
+
+            fn visit_map<M>(self, mut map: M) -> Result<Document, M::Error>
+            where
+                M: MapAccess<'de>,
+            {
+                let mut node_tree = None;
+                while let Some(key) = map.next_key()? {
+                    match key {
+                        "document" => {
+                            if node_tree.is_some() {
+                                return Err(de::Error::duplicate_field("document"));
+                            }
+                            node_tree = Some(map.next_value::<NodeTree>()?)
+                        }
+                        s => {
+                            return Err(de::Error::unknown_field(s, FIELDS));
+                        }
+                    }
+                }
+
+                match node_tree {
+                    Some(tree) => Ok(Document::new(tree)),
+                    None => Err(de::Error::missing_field("document")),
+                }
+            }
+        }
+        deserializer.deserialize_any(DocumentVisitor())
+    }
+}
+
+#[derive(Debug)]
+struct DocumentContentSerializer<'a>(pub &'a Document);
+
+#[derive(Default, Debug, Clone, Serialize, Deserialize, Eq, PartialEq)]
+pub struct DocumentNodeData {
+    #[serde(rename = "type")]
+    pub node_type: String,
+
+    #[serde(skip_serializing_if = "AttributeHashMap::is_empty")]
+    #[serde(default)]
+    pub attributes: AttributeHashMap,
+
+    #[serde(skip_serializing_if = "TextOperations::is_empty")]
+    pub delta: TextOperations,
+
+    #[serde(skip_serializing_if = "Vec::is_empty")]
+    #[serde(default)]
+    pub children: Vec<DocumentNodeData>,
+}
+
+impl std::convert::From<NodeData> for DocumentNodeData {
+    fn from(node_data: NodeData) -> Self {
+        let delta = if let Body::Delta(operations) = node_data.body {
+            operations
+        } else {
+            TextOperations::default()
+        };
+        DocumentNodeData {
+            node_type: node_data.node_type,
+            attributes: node_data.attributes,
+            delta,
+            children: node_data.children.into_iter().map(DocumentNodeData::from).collect(),
+        }
+    }
+}
+
+impl<'a> Serialize for DocumentContentSerializer<'a> {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        let tree = self.0.get_tree();
+        let root_node_id = tree.root_node_id();
+
+        // transform the NodeData to DocumentNodeData
+        let get_document_node_data = |node_id: NodeId| tree.get_node_data(node_id).map(DocumentNodeData::from);
+
+        let mut children = tree.get_children_ids(root_node_id);
+        if children.len() == 1 {
+            let node_id = children.pop().unwrap();
+            match get_document_node_data(node_id) {
+                None => serializer.serialize_str(""),
+                Some(node_data) => node_data.serialize(serializer),
+            }
+        } else {
+            let mut seq = serializer.serialize_seq(Some(children.len()))?;
+            for child in children {
+                if let Some(node_data) = get_document_node_data(child) {
+                    let _ = seq.serialize_element(&node_data)?;
+                }
+            }
+            seq.end()
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::editor::document::Document;
+
+    #[test]
+    fn document_serde_test() {
+        let document: Document = serde_json::from_str(EXAMPLE_DOCUMENT).unwrap();
+        let _ = serde_json::to_string_pretty(&document).unwrap();
+    }
+
+    const EXAMPLE_DOCUMENT: &str = r#"{
+  "document": {
+    "type": "editor",
+    "children": [
+      {
+        "type": "image",
+        "attributes": {
+          "image_src": "https://s1.ax1x.com/2022/08/26/v2sSbR.jpg",
+          "align": "center"
+        }
+      },
+      {
+        "type": "text",
+        "attributes": { "subtype": "heading", "heading": "h1" },
+        "delta": [
+          { "insert": "👋 " },
+          { "insert": "Welcome to ", "attributes": { "bold": true } },
+          {
+            "insert": "AppFlowy Editor",
+            "attributes": {
+              "href": "appflowy.io",
+              "italic": true,
+              "bold": true
+            }
+          }
+        ]
+      },
+      { "type": "text", "delta": [] },
+      {
+        "type": "text",
+        "delta": [
+          { "insert": "AppFlowy Editor is a " },
+          { "insert": "highly customizable", "attributes": { "bold": true } },
+          { "insert": " " },
+          { "insert": "rich-text editor", "attributes": { "italic": true } },
+          { "insert": " for " },
+          { "insert": "Flutter", "attributes": { "underline": true } }
+        ]
+      },
+      {
+        "type": "text",
+        "attributes": { "checkbox": true, "subtype": "checkbox" },
+        "delta": [{ "insert": "Customizable" }]
+      },
+      {
+        "type": "text",
+        "attributes": { "checkbox": true, "subtype": "checkbox" },
+        "delta": [{ "insert": "Test-covered" }]
+      },
+      {
+        "type": "text",
+        "attributes": { "checkbox": false, "subtype": "checkbox" },
+        "delta": [{ "insert": "more to come!" }]
+      },
+      { "type": "text", "delta": [] },
+      {
+        "type": "text",
+        "attributes": { "subtype": "quote" },
+        "delta": [{ "insert": "Here is an example you can give a try" }]
+      },
+      { "type": "text", "delta": [] },
+      {
+        "type": "text",
+        "delta": [
+          { "insert": "You can also use " },
+          {
+            "insert": "AppFlowy Editor",
+            "attributes": {
+              "italic": true,
+              "bold": true,
+              "backgroundColor": "0x6000BCF0"
+            }
+          },
+          { "insert": " as a component to build your own app." }
+        ]
+      },
+      { "type": "text", "delta": [] },
+      {
+        "type": "text",
+        "attributes": { "subtype": "bulleted-list" },
+        "delta": [{ "insert": "Use / to insert blocks" }]
+      },
+      {
+        "type": "text",
+        "attributes": { "subtype": "bulleted-list" },
+        "delta": [
+          {
+            "insert": "Select text to trigger to the toolbar to format your notes."
+          }
+        ]
+      },
+      { "type": "text", "delta": [] },
+      {
+        "type": "text",
+        "delta": [
+          {
+            "insert": "If you have questions or feedback, please submit an issue on Github or join the community along with 1000+ builders!"
+          }
+        ]
+      }
+    ]
+  }
+}
+"#;
+}

frontend/rust-lib/flowy-document/src/editor/editor.rs

@@ -0,0 +1,92 @@
+use crate::editor::document::{Document, DocumentRevisionSerde};
+use crate::editor::queue::{Command, CommandSender, DocumentQueue};
+use crate::{DocumentEditor, DocumentUser};
+use bytes::Bytes;
+use flowy_error::{internal_error, FlowyError, FlowyResult};
+use flowy_revision::{RevisionCloudService, RevisionManager};
+use flowy_sync::entities::ws_data::ServerRevisionWSData;
+use lib_infra::future::FutureResult;
+use lib_ot::core::Transaction;
+use lib_ws::WSConnectState;
+use std::any::Any;
+use std::sync::Arc;
+use tokio::sync::{mpsc, oneshot};
+
+pub struct AppFlowyDocumentEditor {
+    #[allow(dead_code)]
+    doc_id: String,
+    command_sender: CommandSender,
+}
+
+impl AppFlowyDocumentEditor {
+    pub async fn new(
+        doc_id: &str,
+        user: Arc<dyn DocumentUser>,
+        mut rev_manager: RevisionManager,
+        cloud_service: Arc<dyn RevisionCloudService>,
+    ) -> FlowyResult<Arc<Self>> {
+        let document = rev_manager.load::<DocumentRevisionSerde>(Some(cloud_service)).await?;
+        let rev_manager = Arc::new(rev_manager);
+        let command_sender = spawn_edit_queue(user, rev_manager, document);
+        let doc_id = doc_id.to_string();
+        let editor = Arc::new(Self { doc_id, command_sender });
+        Ok(editor)
+    }
+
+    pub async fn apply_transaction(&self, transaction: Transaction) -> FlowyResult<()> {
+        let (ret, rx) = oneshot::channel::<FlowyResult<()>>();
+        let _ = self
+            .command_sender
+            .send(Command::ComposeTransaction { transaction, ret })
+            .await;
+        let _ = rx.await.map_err(internal_error)??;
+        Ok(())
+    }
+
+    pub async fn get_content(&self, pretty: bool) -> FlowyResult<String> {
+        let (ret, rx) = oneshot::channel::<FlowyResult<String>>();
+        let _ = self
+            .command_sender
+            .send(Command::GetDocumentContent { pretty, ret })
+            .await;
+        let content = rx.await.map_err(internal_error)??;
+        Ok(content)
+    }
+}
+
+fn spawn_edit_queue(
+    user: Arc<dyn DocumentUser>,
+    rev_manager: Arc<RevisionManager>,
+    document: Document,
+) -> CommandSender {
+    let (sender, receiver) = mpsc::channel(1000);
+    let queue = DocumentQueue::new(user, rev_manager, document, receiver);
+    tokio::spawn(queue.run());
+    sender
+}
+
+impl DocumentEditor for Arc<AppFlowyDocumentEditor> {
+    fn get_operations_str(&self) -> FutureResult<String, FlowyError> {
+        todo!()
+    }
+
+    fn compose_local_operations(&self, _data: Bytes) -> FutureResult<(), FlowyError> {
+        todo!()
+    }
+
+    fn close(&self) {
+        todo!()
+    }
+
+    fn receive_ws_data(&self, _data: ServerRevisionWSData) -> FutureResult<(), FlowyError> {
+        todo!()
+    }
+
+    fn receive_ws_state(&self, _state: &WSConnectState) {
+        todo!()
+    }
+
+    fn as_any(&self) -> &dyn Any {
+        self
+    }
+}

frontend/rust-lib/flowy-document/src/editor/mod.rs

@@ -0,0 +1,8 @@
+#![allow(clippy::module_inception)]
+mod document;
+mod document_serde;
+mod editor;
+mod queue;
+
+pub use document::*;
+pub use editor::*;

frontend/rust-lib/flowy-document/src/editor/queue.rs

@@ -0,0 +1,78 @@
+use crate::editor::document::Document;
+use crate::DocumentUser;
+use async_stream::stream;
+use flowy_error::FlowyError;
+use flowy_revision::RevisionManager;
+use futures::stream::StreamExt;
+use lib_ot::core::Transaction;
+use std::sync::Arc;
+use tokio::sync::mpsc::{Receiver, Sender};
+use tokio::sync::{oneshot, RwLock};
+pub struct DocumentQueue {
+    #[allow(dead_code)]
+    user: Arc<dyn DocumentUser>,
+    document: Arc<RwLock<Document>>,
+    #[allow(dead_code)]
+    rev_manager: Arc<RevisionManager>,
+    receiver: Option<CommandReceiver>,
+}
+
+impl DocumentQueue {
+    pub fn new(
+        user: Arc<dyn DocumentUser>,
+        rev_manager: Arc<RevisionManager>,
+        document: Document,
+        receiver: CommandReceiver,
+    ) -> Self {
+        let document = Arc::new(RwLock::new(document));
+        Self {
+            user,
+            document,
+            rev_manager,
+            receiver: Some(receiver),
+        }
+    }
+
+    pub async fn run(mut self) {
+        let mut receiver = self.receiver.take().expect("Only take once");
+        let stream = stream! {
+            loop {
+                match receiver.recv().await {
+                    Some(msg) => yield msg,
+                    None => break,
+                }
+            }
+        };
+        stream
+            .for_each(|command| async {
+                match self.handle_command(command).await {
+                    Ok(_) => {}
+                    Err(e) => tracing::debug!("[DocumentQueue]: {}", e),
+                }
+            })
+            .await;
+    }
+
+    async fn handle_command(&self, command: Command) -> Result<(), FlowyError> {
+        match command {
+            Command::ComposeTransaction { transaction, ret } => {
+                self.document.write().await.apply_transaction(transaction)?;
+                let _ = ret.send(Ok(()));
+            }
+            Command::GetDocumentContent { pretty, ret } => {
+                let content = self.document.read().await.get_content(pretty)?;
+                let _ = ret.send(Ok(content));
+            }
+        }
+        Ok(())
+    }
+}
+
+pub(crate) type CommandSender = Sender<Command>;
+pub(crate) type CommandReceiver = Receiver<Command>;
+pub(crate) type Ret<T> = oneshot::Sender<Result<T, FlowyError>>;
+
+pub enum Command {
+    ComposeTransaction { transaction: Transaction, ret: Ret<()> },
+    GetDocumentContent { pretty: bool, ret: Ret<String> },
+}

frontend/rust-lib/flowy-document/src/entities.rs

@@ -9,13 +9,13 @@ pub enum ExportType {
     Link = 2,
 }
 
-impl std::default::Default for ExportType {
+impl Default for ExportType {
     fn default() -> Self {
         ExportType::Text
     }
 }
 
-impl std::convert::From<i32> for ExportType {
+impl From<i32> for ExportType {
     fn from(val: i32) -> Self {
         match val {
             0 => ExportType::Text,
@@ -37,10 +37,6 @@ pub struct EditPayloadPB {
     // Encode in JSON format
     #[pb(index = 2)]
     pub operations: String,
-
-    // Encode in JSON format
-    #[pb(index = 3)]
-    pub operations_str: String,
 }
 
 #[derive(Default)]
@@ -49,9 +45,6 @@ pub struct EditParams {
 
     // Encode in JSON format
     pub operations: String,
-
-    // Encode in JSON format
-    pub operations_str: String,
 }
 
 impl TryInto<EditParams> for EditPayloadPB {
@@ -60,7 +53,6 @@ impl TryInto<EditParams> for EditPayloadPB {
         Ok(EditParams {
             doc_id: self.doc_id,
             operations: self.operations,
-            operations_str: self.operations_str,
         })
     }
 }

frontend/rust-lib/flowy-document/src/event_handler.rs

@@ -12,7 +12,7 @@ pub(crate) async fn get_document_handler(
 ) -> DataResult<DocumentSnapshotPB, FlowyError> {
     let document_id: DocumentIdPB = data.into_inner();
     let editor = manager.open_document_editor(&document_id).await?;
-    let operations_str = editor.get_operation_str().await?;
+    let operations_str = editor.get_operations_str().await?;
     data_result(DocumentSnapshotPB {
         doc_id: document_id.into(),
         snapshot: operations_str,
@@ -35,7 +35,7 @@ pub(crate) async fn export_handler(
 ) -> DataResult<ExportDataPB, FlowyError> {
     let params: ExportParams = data.into_inner().try_into()?;
     let editor = manager.open_document_editor(&params.view_id).await?;
-    let operations_str = editor.get_operation_str().await?;
+    let operations_str = editor.get_operations_str().await?;
     data_result(ExportDataPB {
         data: operations_str,
         export_type: params.export_type,

frontend/rust-lib/flowy-document/src/lib.rs

@@ -1,12 +1,12 @@
-pub mod editor;
 mod entities;
 mod event_handler;
 pub mod event_map;
 pub mod manager;
-mod queue;
-mod web_socket;
 
+pub mod editor;
+pub mod old_editor;
 pub mod protobuf;
+
 pub use manager::*;
 pub mod errors {
     pub use flowy_error::{internal_error, ErrorCode, FlowyError};

frontend/rust-lib/flowy-document/src/manager.rs

@@ -1,6 +1,7 @@
-use crate::editor::DocumentRevisionCompactor;
+use crate::editor::{initial_document_content, AppFlowyDocumentEditor};
 use crate::entities::EditParams;
-use crate::{editor::DocumentEditor, errors::FlowyError, DocumentCloudService};
+use crate::old_editor::editor::{DocumentRevisionCompress, OldDocumentEditor};
+use crate::{errors::FlowyError, DocumentCloudService};
 use bytes::Bytes;
 use dashmap::DashMap;
 use flowy_database::ConnectionPool;
@@ -9,12 +10,16 @@ use flowy_revision::disk::SQLiteDocumentRevisionPersistence;
 use flowy_revision::{
     RevisionCloudService, RevisionManager, RevisionPersistence, RevisionWebSocket, SQLiteRevisionSnapshotPersistence,
 };
+use flowy_sync::client_document::initial_old_document_content;
 use flowy_sync::entities::{
     document::{DocumentIdPB, DocumentOperationsPB},
     revision::{md5, RepeatedRevision, Revision},
     ws_data::ServerRevisionWSData,
 };
 use lib_infra::future::FutureResult;
+
+use lib_ws::WSConnectState;
+use std::any::Any;
 use std::{convert::TryInto, sync::Arc};
 
 pub trait DocumentUser: Send + Sync {
@@ -24,11 +29,36 @@ pub trait DocumentUser: Send + Sync {
     fn db_pool(&self) -> Result<Arc<ConnectionPool>, FlowyError>;
 }
 
+pub trait DocumentEditor: Send + Sync {
+    fn get_operations_str(&self) -> FutureResult<String, FlowyError>;
+    fn compose_local_operations(&self, data: Bytes) -> FutureResult<(), FlowyError>;
+    fn close(&self);
+
+    fn receive_ws_data(&self, data: ServerRevisionWSData) -> FutureResult<(), FlowyError>;
+    fn receive_ws_state(&self, state: &WSConnectState);
+
+    /// Returns the `Any` reference that can be used to downcast back to the original,
+    /// concrete type.
+    ///
+    /// The indirection through `as_any` is because using `downcast_ref`
+    /// on `Box<A>` *directly* only lets us downcast back to `&A` again. You can take a look at [this](https://stackoverflow.com/questions/33687447/how-to-get-a-reference-to-a-concrete-type-from-a-trait-object)
+    /// for more information.
+    ///
+    ///
+    fn as_any(&self) -> &dyn Any;
+}
+
+#[derive(Clone, Debug)]
+pub struct DocumentConfig {
+    pub use_new_editor: bool,
+}
+
 pub struct DocumentManager {
     cloud_service: Arc<dyn DocumentCloudService>,
     rev_web_socket: Arc<dyn RevisionWebSocket>,
     editor_map: Arc<DocumentEditorMap>,
     user: Arc<dyn DocumentUser>,
+    config: DocumentConfig,
 }
 
 impl DocumentManager {
@@ -36,12 +66,14 @@ impl DocumentManager {
         cloud_service: Arc<dyn DocumentCloudService>,
         document_user: Arc<dyn DocumentUser>,
         rev_web_socket: Arc<dyn RevisionWebSocket>,
+        config: DocumentConfig,
     ) -> Self {
         Self {
             cloud_service,
             rev_web_socket,
             editor_map: Arc::new(DocumentEditorMap::new()),
             user: document_user,
+            config,
         }
     }
 
@@ -52,10 +84,13 @@ impl DocumentManager {
     }
 
     #[tracing::instrument(level = "trace", skip(self, editor_id), fields(editor_id), err)]
-    pub async fn open_document_editor<T: AsRef<str>>(&self, editor_id: T) -> Result<Arc<DocumentEditor>, FlowyError> {
+    pub async fn open_document_editor<T: AsRef<str>>(
+        &self,
+        editor_id: T,
+    ) -> Result<Arc<dyn DocumentEditor>, FlowyError> {
         let editor_id = editor_id.as_ref();
         tracing::Span::current().record("editor_id", &editor_id);
-        self.get_document_editor(editor_id).await
+        self.init_document_editor(editor_id).await
     }
 
     #[tracing::instrument(level = "trace", skip(self, editor_id), fields(editor_id), err)]
@@ -75,7 +110,7 @@ impl DocumentManager {
         let _ = editor
             .compose_local_operations(Bytes::from(payload.operations_str))
             .await?;
-        let operations_str = editor.get_operation_str().await?;
+        let operations_str = editor.get_operations_str().await?;
         Ok(DocumentOperationsPB {
             doc_id: payload.doc_id.clone(),
             operations_str,
@@ -84,9 +119,7 @@ impl DocumentManager {
 
     pub async fn apply_edit(&self, params: EditParams) -> FlowyResult<()> {
         let editor = self.get_document_editor(&params.doc_id).await?;
-        let _ = editor
-            .compose_local_operations(Bytes::from(params.operations_str))
-            .await?;
+        let _ = editor.compose_local_operations(Bytes::from(params.operations)).await?;
         Ok(())
     }
 
@@ -114,12 +147,18 @@ impl DocumentManager {
             }
         }
     }
+
+    pub fn initial_document_content(&self) -> String {
+        if self.config.use_new_editor {
+            initial_document_content()
+        } else {
+            initial_old_document_content()
+        }
+    }
 }
 
 impl DocumentManager {
     /// Returns the `DocumentEditor`
-    /// Initializes the document editor if it's not initialized yet. Otherwise, returns the opened
-    /// editor.
     ///
     /// # Arguments
     ///
@@ -127,12 +166,9 @@ impl DocumentManager {
     ///
     /// returns: Result<Arc<DocumentEditor>, FlowyError>
     ///
-    async fn get_document_editor(&self, doc_id: &str) -> FlowyResult<Arc<DocumentEditor>> {
+    async fn get_document_editor(&self, doc_id: &str) -> FlowyResult<Arc<dyn DocumentEditor>> {
         match self.editor_map.get(doc_id) {
-            None => {
-                let db_pool = self.user.db_pool()?;
-                self.init_document_editor(doc_id, db_pool).await
-            }
+            None => self.init_document_editor(doc_id).await,
             Some(editor) => Ok(editor),
         }
     }
@@ -146,12 +182,9 @@ impl DocumentManager {
     ///
     /// returns: Result<Arc<DocumentEditor>, FlowyError>
     ///
-    #[tracing::instrument(level = "trace", skip(self, pool), err)]
-    async fn init_document_editor(
-        &self,
-        doc_id: &str,
-        pool: Arc<ConnectionPool>,
-    ) -> Result<Arc<DocumentEditor>, FlowyError> {
+    #[tracing::instrument(level = "trace", skip(self), err)]
+    pub async fn init_document_editor(&self, doc_id: &str) -> Result<Arc<dyn DocumentEditor>, FlowyError> {
+        let pool = self.user.db_pool()?;
         let user = self.user.clone();
         let token = self.user.token()?;
         let rev_manager = self.make_document_rev_manager(doc_id, pool.clone())?;
@@ -159,8 +192,16 @@ impl DocumentManager {
             token,
             server: self.cloud_service.clone(),
         });
-        let editor = DocumentEditor::new(doc_id, user, rev_manager, self.rev_web_socket.clone(), cloud_service).await?;
-        self.editor_map.insert(doc_id, &editor);
+
+        let editor: Arc<dyn DocumentEditor> = if self.config.use_new_editor {
+            let editor = AppFlowyDocumentEditor::new(doc_id, user, rev_manager, cloud_service).await?;
+            Arc::new(editor)
+        } else {
+            let editor =
+                OldDocumentEditor::new(doc_id, user, rev_manager, self.rev_web_socket.clone(), cloud_service).await?;
+            Arc::new(editor)
+        };
+        self.editor_map.insert(doc_id, editor.clone());
         Ok(editor)
     }
 
@@ -174,7 +215,7 @@ impl DocumentManager {
         let rev_persistence = RevisionPersistence::new(&user_id, doc_id, disk_cache);
         // let history_persistence = SQLiteRevisionHistoryPersistence::new(doc_id, pool.clone());
         let snapshot_persistence = SQLiteRevisionSnapshotPersistence::new(doc_id, pool);
-        let rev_compactor = DocumentRevisionCompactor();
+        let rev_compactor = DocumentRevisionCompress();
 
         Ok(RevisionManager::new(
             &user_id,
@@ -222,7 +263,7 @@ impl RevisionCloudService for DocumentRevisionCloudService {
 }
 
 pub struct DocumentEditorMap {
-    inner: DashMap<String, Arc<DocumentEditor>>,
+    inner: DashMap<String, Arc<dyn DocumentEditor>>,
 }
 
 impl DocumentEditorMap {
@@ -230,20 +271,20 @@ impl DocumentEditorMap {
         Self { inner: DashMap::new() }
     }
 
-    pub(crate) fn insert(&self, editor_id: &str, doc: &Arc<DocumentEditor>) {
+    pub(crate) fn insert(&self, editor_id: &str, editor: Arc<dyn DocumentEditor>) {
         if self.inner.contains_key(editor_id) {
-            log::warn!("Doc:{} already exists in cache", editor_id);
+            log::warn!("Editor:{} already exists in cache", editor_id);
         }
-        self.inner.insert(editor_id.to_string(), doc.clone());
+        self.inner.insert(editor_id.to_string(), editor);
     }
 
-    pub(crate) fn get(&self, editor_id: &str) -> Option<Arc<DocumentEditor>> {
+    pub(crate) fn get(&self, editor_id: &str) -> Option<Arc<dyn DocumentEditor>> {
         Some(self.inner.get(editor_id)?.clone())
     }
 
     pub(crate) fn remove(&self, editor_id: &str) {
         if let Some(editor) = self.get(editor_id) {
-            editor.stop()
+            editor.close()
         }
         self.inner.remove(editor_id);
     }

frontend/rust-lib/flowy-document/src/old_editor/conflict.rs

@@ -0,0 +1 @@
+

frontend/rust-lib/flowy-document/src/old_editor/editor.rs

@@ -1,9 +1,7 @@
-use crate::web_socket::EditorCommandSender;
-use crate::{
-    errors::FlowyError,
-    queue::{EditDocumentQueue, EditorCommand},
-    DocumentUser,
-};
+#![allow(unused_attributes)]
+#![allow(unused_attributes)]
+use crate::old_editor::queue::{EditDocumentQueue, EditorCommand, EditorCommandSender};
+use crate::{errors::FlowyError, DocumentEditor, DocumentUser};
 use bytes::Bytes;
 use flowy_error::{internal_error, FlowyResult};
 use flowy_revision::{
@@ -16,16 +14,18 @@ use flowy_sync::{
     errors::CollaborateResult,
     util::make_operations_from_revisions,
 };
+use lib_infra::future::FutureResult;
 use lib_ot::core::{AttributeEntry, AttributeHashMap};
 use lib_ot::{
     core::{DeltaOperation, Interval},
     text_delta::TextOperations,
 };
 use lib_ws::WSConnectState;
+use std::any::Any;
 use std::sync::Arc;
 use tokio::sync::{mpsc, oneshot};
 
-pub struct DocumentEditor {
+pub struct OldDocumentEditor {
     pub doc_id: String,
     #[allow(dead_code)]
     rev_manager: Arc<RevisionManager>,
@@ -34,7 +34,7 @@ pub struct DocumentEditor {
     edit_cmd_tx: EditorCommandSender,
 }
 
-impl DocumentEditor {
+impl OldDocumentEditor {
     #[allow(unused_variables)]
     pub(crate) async fn new(
         doc_id: &str,
@@ -43,15 +43,17 @@ impl DocumentEditor {
         rev_web_socket: Arc<dyn RevisionWebSocket>,
         cloud_service: Arc<dyn RevisionCloudService>,
     ) -> FlowyResult<Arc<Self>> {
-        let document_info = rev_manager.load::<DocumentRevisionSerde>(Some(cloud_service)).await?;
-        let operations = TextOperations::from_bytes(&document_info.content)?;
+        let document = rev_manager
+            .load::<DeltaDocumentRevisionSerde>(Some(cloud_service))
+            .await?;
+        let operations = TextOperations::from_bytes(&document.content)?;
         let rev_manager = Arc::new(rev_manager);
         let doc_id = doc_id.to_string();
         let user_id = user.user_id()?;
 
         let edit_cmd_tx = spawn_edit_queue(user, rev_manager.clone(), operations);
         #[cfg(feature = "sync")]
-        let ws_manager = crate::web_socket::make_document_ws_manager(
+        let ws_manager = crate::old_editor::web_socket::make_document_ws_manager(
             doc_id.clone(),
             user_id.clone(),
             edit_cmd_tx.clone(),
@@ -142,51 +144,60 @@ impl DocumentEditor {
         let _ = rx.await.map_err(internal_error)??;
         Ok(())
     }
+}
 
-    pub async fn get_operation_str(&self) -> FlowyResult<String> {
+impl DocumentEditor for Arc<OldDocumentEditor> {
+    fn get_operations_str(&self) -> FutureResult<String, FlowyError> {
         let (ret, rx) = oneshot::channel::<CollaborateResult<String>>();
-        let msg = EditorCommand::StringifyOperations { ret };
-        let _ = self.edit_cmd_tx.send(msg).await;
-        let json = rx.await.map_err(internal_error)??;
-        Ok(json)
+        let msg = EditorCommand::GetOperationsString { ret };
+        let edit_cmd_tx = self.edit_cmd_tx.clone();
+        FutureResult::new(async move {
+            let _ = edit_cmd_tx.send(msg).await;
+            let json = rx.await.map_err(internal_error)??;
+            Ok(json)
+        })
     }
 
-    #[tracing::instrument(level = "trace", skip(self, data), err)]
-    pub(crate) async fn compose_local_operations(&self, data: Bytes) -> Result<(), FlowyError> {
-        let operations = TextOperations::from_bytes(&data)?;
-        let (ret, rx) = oneshot::channel::<CollaborateResult<()>>();
-        let msg = EditorCommand::ComposeLocalOperations { operations, ret };
-        let _ = self.edit_cmd_tx.send(msg).await;
-        let _ = rx.await.map_err(internal_error)??;
-        Ok(())
+    fn compose_local_operations(&self, data: Bytes) -> FutureResult<(), FlowyError> {
+        let edit_cmd_tx = self.edit_cmd_tx.clone();
+        FutureResult::new(async move {
+            let operations = TextOperations::from_bytes(&data)?;
+            let (ret, rx) = oneshot::channel::<CollaborateResult<()>>();
+            let msg = EditorCommand::ComposeLocalOperations { operations, ret };
+
+            let _ = edit_cmd_tx.send(msg).await;
+            let _ = rx.await.map_err(internal_error)??;
+            Ok(())
+        })
     }
 
-    #[cfg(feature = "sync")]
-    pub fn stop(&self) {
+    fn close(&self) {
+        #[cfg(feature = "sync")]
         self.ws_manager.stop();
     }
 
-    #[cfg(not(feature = "sync"))]
-    pub fn stop(&self) {}
+    #[allow(unused_variables)]
+    fn receive_ws_data(&self, data: ServerRevisionWSData) -> FutureResult<(), FlowyError> {
+        let cloned_self = self.clone();
+        FutureResult::new(async move {
+            #[cfg(feature = "sync")]
+            let _ = cloned_self.ws_manager.receive_ws_data(data).await?;
 
-    #[cfg(feature = "sync")]
-    pub(crate) async fn receive_ws_data(&self, data: ServerRevisionWSData) -> Result<(), FlowyError> {
-        self.ws_manager.receive_ws_data(data).await
-    }
-    #[cfg(not(feature = "sync"))]
-    pub(crate) async fn receive_ws_data(&self, _data: ServerRevisionWSData) -> Result<(), FlowyError> {
-        Ok(())
+            Ok(())
+        })
     }
 
-    #[cfg(feature = "sync")]
-    pub(crate) fn receive_ws_state(&self, state: &WSConnectState) {
+    #[allow(unused_variables)]
+    fn receive_ws_state(&self, state: &WSConnectState) {
+        #[cfg(feature = "sync")]
         self.ws_manager.connect_state_changed(state.clone());
     }
-    #[cfg(not(feature = "sync"))]
-    pub(crate) fn receive_ws_state(&self, _state: &WSConnectState) {}
-}
 
-impl std::ops::Drop for DocumentEditor {
+    fn as_any(&self) -> &dyn Any {
+        self
+    }
+}
+impl std::ops::Drop for OldDocumentEditor {
     fn drop(&mut self) {
         tracing::trace!("{} DocumentEditor was dropped", self.doc_id)
     }
@@ -214,10 +225,10 @@ fn spawn_edit_queue(
 }
 
 #[cfg(feature = "flowy_unit_test")]
-impl DocumentEditor {
+impl OldDocumentEditor {
     pub async fn document_operations(&self) -> FlowyResult<TextOperations> {
         let (ret, rx) = oneshot::channel::<CollaborateResult<TextOperations>>();
-        let msg = EditorCommand::ReadOperations { ret };
+        let msg = EditorCommand::GetOperations { ret };
         let _ = self.edit_cmd_tx.send(msg).await;
         let delta = rx.await.map_err(internal_error)??;
         Ok(delta)
@@ -228,8 +239,8 @@ impl DocumentEditor {
     }
 }
 
-pub struct DocumentRevisionSerde();
-impl RevisionObjectDeserializer for DocumentRevisionSerde {
+pub struct DeltaDocumentRevisionSerde();
+impl RevisionObjectDeserializer for DeltaDocumentRevisionSerde {
     type Output = DocumentPayloadPB;
 
     fn deserialize_revisions(object_id: &str, revisions: Vec<Revision>) -> FlowyResult<Self::Output> {
@@ -246,17 +257,17 @@ impl RevisionObjectDeserializer for DocumentRevisionSerde {
     }
 }
 
-impl RevisionObjectSerializer for DocumentRevisionSerde {
-    fn serialize_revisions(revisions: Vec<Revision>) -> FlowyResult<Bytes> {
+impl RevisionObjectSerializer for DeltaDocumentRevisionSerde {
+    fn combine_revisions(revisions: Vec<Revision>) -> FlowyResult<Bytes> {
         let operations = make_operations_from_revisions::<AttributeHashMap>(revisions)?;
         Ok(operations.json_bytes())
     }
 }
 
-pub(crate) struct DocumentRevisionCompactor();
-impl RevisionCompress for DocumentRevisionCompactor {
-    fn serialize_revisions(&self, revisions: Vec<Revision>) -> FlowyResult<Bytes> {
-        DocumentRevisionSerde::serialize_revisions(revisions)
+pub(crate) struct DocumentRevisionCompress();
+impl RevisionCompress for DocumentRevisionCompress {
+    fn combine_revisions(&self, revisions: Vec<Revision>) -> FlowyResult<Bytes> {
+        DeltaDocumentRevisionSerde::combine_revisions(revisions)
     }
 }
 

frontend/rust-lib/flowy-document/src/old_editor/mod.rs

@@ -0,0 +1,4 @@
+pub mod conflict;
+pub mod editor;
+pub mod queue;
+mod web_socket;

frontend/rust-lib/flowy-document/src/old_editor/queue.rs

@@ -1,4 +1,4 @@
-use crate::web_socket::{DocumentResolveOperations, EditorCommandReceiver};
+use crate::old_editor::web_socket::DocumentResolveOperations;
 use crate::DocumentUser;
 use async_stream::stream;
 use flowy_error::FlowyError;
@@ -15,6 +15,7 @@ use lib_ot::{
     text_delta::TextOperations,
 };
 use std::sync::Arc;
+use tokio::sync::mpsc::{Receiver, Sender};
 use tokio::sync::{oneshot, RwLock};
 
 // The EditorCommandQueue executes each command that will alter the document in
@@ -161,11 +162,11 @@ impl EditDocumentQueue {
                 let _ = self.save_local_operations(operations, md5).await?;
                 let _ = ret.send(Ok(()));
             }
-            EditorCommand::StringifyOperations { ret } => {
+            EditorCommand::GetOperationsString { ret } => {
                 let data = self.document.read().await.get_operations_json();
                 let _ = ret.send(Ok(data));
             }
-            EditorCommand::ReadOperations { ret } => {
+            EditorCommand::GetOperations { ret } => {
                 let operations = self.document.read().await.get_operations().clone();
                 let _ = ret.send(Ok(operations));
             }
@@ -184,7 +185,8 @@ impl EditDocumentQueue {
 }
 
 pub type TextTransformOperations = TransformOperations<DocumentResolveOperations>;
-
+pub(crate) type EditorCommandSender = Sender<EditorCommand>;
+pub(crate) type EditorCommandReceiver = Receiver<EditorCommand>;
 pub(crate) type Ret<T> = oneshot::Sender<Result<T, CollaborateError>>;
 
 pub(crate) enum EditorCommand {
@@ -235,11 +237,11 @@ pub(crate) enum EditorCommand {
     Redo {
         ret: Ret<()>,
     },
-    StringifyOperations {
+    GetOperationsString {
         ret: Ret<String>,
     },
     #[allow(dead_code)]
-    ReadOperations {
+    GetOperations {
         ret: Ret<TextOperations>,
     },
 }
@@ -259,8 +261,8 @@ impl std::fmt::Debug for EditorCommand {
             EditorCommand::CanRedo { .. } => "CanRedo",
             EditorCommand::Undo { .. } => "Undo",
             EditorCommand::Redo { .. } => "Redo",
-            EditorCommand::StringifyOperations { .. } => "StringifyOperations",
-            EditorCommand::ReadOperations { .. } => "ReadOperations",
+            EditorCommand::GetOperationsString { .. } => "StringifyOperations",
+            EditorCommand::GetOperations { .. } => "ReadOperations",
         };
         f.write_str(s)
     }

frontend/rust-lib/flowy-document/src/old_editor/web_socket.rs

@@ -1,9 +1,10 @@
-use crate::queue::TextTransformOperations;
-use crate::{queue::EditorCommand, TEXT_BLOCK_SYNC_INTERVAL_IN_MILLIS};
+use crate::old_editor::queue::{EditorCommand, EditorCommandSender, TextTransformOperations};
+use crate::TEXT_BLOCK_SYNC_INTERVAL_IN_MILLIS;
 use bytes::Bytes;
 use flowy_error::{internal_error, FlowyError, FlowyResult};
 use flowy_revision::*;
 use flowy_sync::entities::revision::Revision;
+use flowy_sync::util::make_operations_from_revisions;
 use flowy_sync::{
     entities::{
         revision::RevisionRange,
@@ -12,19 +13,10 @@ use flowy_sync::{
     errors::CollaborateResult,
 };
 use lib_infra::future::{BoxResultFuture, FutureResult};
-
-use flowy_sync::util::make_operations_from_revisions;
 use lib_ot::text_delta::TextOperations;
 use lib_ws::WSConnectState;
 use std::{sync::Arc, time::Duration};
-use tokio::sync::{
-    broadcast,
-    mpsc::{Receiver, Sender},
-    oneshot,
-};
-
-pub(crate) type EditorCommandSender = Sender<EditorCommand>;
-pub(crate) type EditorCommandReceiver = Receiver<EditorCommand>;
+use tokio::sync::{broadcast, oneshot};
 
 #[derive(Clone)]
 pub struct DocumentResolveOperations(pub TextOperations);

frontend/rust-lib/flowy-document/tests/document/mod.rs

@@ -1,2 +0,0 @@
-mod script;
-mod text_block_test;

frontend/rust-lib/flowy-document/tests/editor/attribute_test.rs

@@ -1,6 +1,6 @@
 #![cfg_attr(rustfmt, rustfmt::skip)]
 use crate::editor::{TestBuilder, TestOp::*};
-use flowy_sync::client_document::{NewlineDoc, EmptyDoc};
+use flowy_sync::client_document::{NewlineDocument, EmptyDocument};
 use lib_ot::core::{Interval, OperationTransform, NEW_LINE, WHITESPACE, OTString};
 use unicode_segmentation::UnicodeSegmentation;
 use lib_ot::text_delta::TextOperations;
@@ -19,7 +19,7 @@ fn attributes_bold_added() {
             ]"#,
         ),
     ];
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -31,7 +31,7 @@ fn attributes_bold_added_and_invert_all() {
         Bold(0, Interval::new(0, 3), false),
         AssertDocJson(0, r#"[{"insert":"123"}]"#),
     ];
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -43,7 +43,7 @@ fn attributes_bold_added_and_invert_partial_suffix() {
         Bold(0, Interval::new(2, 4), false),
         AssertDocJson(0, r#"[{"insert":"12","attributes":{"bold":true}},{"insert":"34"}]"#),
     ];
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -57,7 +57,7 @@ fn attributes_bold_added_and_invert_partial_suffix2() {
         Bold(0, Interval::new(2, 4), true),
         AssertDocJson(0, r#"[{"insert":"1234","attributes":{"bold":true}}]"#),
     ];
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -85,7 +85,7 @@ fn attributes_bold_added_with_new_line() {
             r#"[{"insert":"123","attributes":{"bold":true}},{"insert":"\na\n"},{"insert":"456","attributes":{"bold":true}},{"insert":"\n"}]"#,
         ),
     ];
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -97,7 +97,7 @@ fn attributes_bold_added_and_invert_partial_prefix() {
         Bold(0, Interval::new(0, 2), false),
         AssertDocJson(0, r#"[{"insert":"12"},{"insert":"34","attributes":{"bold":true}}]"#),
     ];
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -109,7 +109,7 @@ fn attributes_bold_added_consecutive() {
         Bold(0, Interval::new(1, 2), true),
         AssertDocJson(0, r#"[{"insert":"12","attributes":{"bold":true}},{"insert":"34"}]"#),
     ];
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -128,7 +128,7 @@ fn attributes_bold_added_italic() {
             r#"[{"insert":"12345678","attributes":{"bold":true,"italic":true}},{"insert":"\n"}]"#,
         ),
     ];
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -156,7 +156,7 @@ fn attributes_bold_added_italic2() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -193,7 +193,7 @@ fn attributes_bold_added_italic3() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -229,7 +229,7 @@ fn attributes_bold_added_italic_delete() {
         AssertDocJson(0, r#"[{"insert":"67"},{"insert":"89","attributes":{"bold":true}}]"#),
     ];
 
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -240,7 +240,7 @@ fn attributes_merge_inserted_text_with_same_attribute() {
         InsertBold(0, "456", Interval::new(3, 6)),
         AssertDocJson(0, r#"[{"insert":"123456","attributes":{"bold":true}}]"#),
     ];
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -255,7 +255,7 @@ fn attributes_compose_attr_attributes_with_attr_attributes_test() {
         AssertDocJson(1, r#"[{"insert":"1234567","attributes":{"bold":true}}]"#),
     ];
 
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -296,7 +296,7 @@ fn attributes_compose_attr_attributes_with_attr_attributes_test2() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -312,7 +312,7 @@ fn attributes_compose_attr_attributes_with_no_attr_attributes_test() {
         AssertDocJson(0, expected),
         AssertDocJson(1, expected),
     ];
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -324,7 +324,7 @@ fn attributes_replace_heading() {
         AssertDocJson(0, r#"[{"insert":"3456","attributes":{"bold":true}}]"#),
     ];
 
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -336,7 +336,7 @@ fn attributes_replace_trailing() {
         AssertDocJson(0, r#"[{"insert":"12345","attributes":{"bold":true}}]"#),
     ];
 
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -350,7 +350,7 @@ fn attributes_replace_middle() {
         AssertDocJson(0, r#"[{"insert":"34","attributes":{"bold":true}}]"#),
     ];
 
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -362,7 +362,7 @@ fn attributes_replace_all() {
         AssertDocJson(0, r#"[]"#),
     ];
 
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -374,7 +374,7 @@ fn attributes_replace_with_text() {
         AssertDocJson(0, r#"[{"insert":"ab"},{"insert":"456","attributes":{"bold":true}}]"#),
     ];
 
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -390,7 +390,7 @@ fn attributes_header_insert_newline_at_middle() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -415,7 +415,7 @@ fn attributes_header_insert_double_newline_at_middle() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -430,7 +430,7 @@ fn attributes_header_insert_newline_at_trailing() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -446,7 +446,7 @@ fn attributes_header_insert_double_newline_at_trailing() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -460,7 +460,7 @@ fn attributes_link_added() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -479,7 +479,7 @@ fn attributes_link_format_with_bold() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -498,7 +498,7 @@ fn attributes_link_insert_char_at_head() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -513,7 +513,7 @@ fn attributes_link_insert_char_at_middle() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -532,7 +532,7 @@ fn attributes_link_insert_char_at_trailing() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -547,7 +547,7 @@ fn attributes_link_insert_newline_at_middle() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -563,7 +563,7 @@ fn attributes_link_auto_format() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -579,7 +579,7 @@ fn attributes_link_auto_format_exist() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -595,7 +595,7 @@ fn attributes_link_auto_format_exist2() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -606,7 +606,7 @@ fn attributes_bullet_added() {
         AssertDocJson(0, r#"[{"insert":"12"},{"insert":"\n","attributes":{"list":"bullet"}}]"#),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -627,7 +627,7 @@ fn attributes_bullet_added_2() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -644,7 +644,7 @@ fn attributes_bullet_remove_partial() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -660,7 +660,7 @@ fn attributes_bullet_auto_exit() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -700,7 +700,7 @@ fn attributes_preserve_block_when_insert_newline_inside() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -717,7 +717,7 @@ fn attributes_preserve_header_format_on_merge() {
         AssertDocJson(0, r#"[{"insert":"123456"},{"insert":"\n","attributes":{"header":1}}]"#),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -737,7 +737,7 @@ fn attributes_format_emoji() {
             r#"[{"insert":"👋 "},{"insert":"\n","attributes":{"header":1}}]"#,
         ),
     ];
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -757,7 +757,7 @@ fn attributes_preserve_list_format_on_merge() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -796,5 +796,5 @@ fn delta_compose() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }

frontend/rust-lib/flowy-document/tests/editor/op_test.rs

@@ -1,6 +1,6 @@
 #![allow(clippy::all)]
 use crate::editor::{Rng, TestBuilder, TestOp::*};
-use flowy_sync::client_document::{EmptyDoc, NewlineDoc};
+use flowy_sync::client_document::{EmptyDocument, NewlineDocument};
 use lib_ot::text_delta::TextOperationBuilder;
 use lib_ot::{core::Interval, core::*, text_delta::TextOperations};
 
@@ -11,7 +11,7 @@ fn attributes_insert_text() {
         Insert(0, "456", 3),
         AssertDocJson(0, r#"[{"insert":"123456"}]"#),
     ];
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -21,7 +21,7 @@ fn attributes_insert_text_at_head() {
         Insert(0, "456", 0),
         AssertDocJson(0, r#"[{"insert":"456123"}]"#),
     ];
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -31,7 +31,7 @@ fn attributes_insert_text_at_middle() {
         Insert(0, "456", 1),
         AssertDocJson(0, r#"[{"insert":"145623"}]"#),
     ];
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -528,7 +528,7 @@ fn transform_two_plain_delta() {
         AssertDocJson(0, r#"[{"insert":"123456"}]"#),
         AssertDocJson(1, r#"[{"insert":"123456"}]"#),
     ];
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -542,7 +542,7 @@ fn transform_two_plain_delta2() {
         AssertDocJson(0, r#"[{"insert":"123456"}]"#),
         AssertDocJson(1, r#"[{"insert":"123456"}]"#),
     ];
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -560,7 +560,7 @@ fn transform_two_non_seq_delta() {
         AssertDocJson(0, r#"[{"insert":"123456"}]"#),
         AssertDocJson(1, r#"[{"insert":"123456789"}]"#),
     ];
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -575,7 +575,7 @@ fn transform_two_conflict_non_seq_delta() {
         AssertDocJson(0, r#"[{"insert":"123456"}]"#),
         AssertDocJson(1, r#"[{"insert":"12378456"}]"#),
     ];
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -602,7 +602,7 @@ fn delta_invert_no_attribute_delta2() {
         Invert(0, 1),
         AssertDocJson(0, r#"[{"insert":"123"}]"#),
     ];
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -615,7 +615,7 @@ fn delta_invert_attribute_delta_with_no_attribute_delta() {
         Invert(0, 1),
         AssertDocJson(0, r#"[{"insert":"123","attributes":{"bold":true}}]"#),
     ];
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -650,7 +650,7 @@ fn delta_invert_attribute_delta_with_no_attribute_delta2() {
             ]"#,
         ),
     ];
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -663,7 +663,7 @@ fn delta_invert_no_attribute_delta_with_attribute_delta() {
         Invert(0, 1),
         AssertDocJson(0, r#"[{"insert":"123"}]"#),
     ];
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -682,7 +682,7 @@ fn delta_invert_no_attribute_delta_with_attribute_delta2() {
         Invert(0, 1),
         AssertDocJson(0, r#"[{"insert":"123"}]"#),
     ];
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -723,7 +723,7 @@ fn delta_invert_attribute_delta_with_attribute_delta() {
             ]"#,
         ),
     ];
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -733,7 +733,7 @@ fn delta_compose_str() {
         Insert(0, "2", 1),
         AssertDocJson(0, r#"[{"insert":"12\n"}]"#),
     ];
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -746,5 +746,5 @@ fn delta_compose_with_missing_delta() {
         AssertDocJson(0, r#"[{"insert":"1234\n"}]"#),
         AssertStr(1, r#"4\n"#),
     ];
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }

frontend/rust-lib/flowy-document/tests/editor/serde_test.rs

@@ -1,4 +1,4 @@
-use flowy_sync::client_document::{ClientDocument, EmptyDoc};
+use flowy_sync::client_document::{ClientDocument, EmptyDocument};
 use lib_ot::text_delta::TextOperation;
 use lib_ot::{
     core::*,
@@ -101,7 +101,7 @@ fn delta_deserialize_null_test() {
 
 #[test]
 fn document_insert_serde_test() {
-    let mut document = ClientDocument::new::<EmptyDoc>();
+    let mut document = ClientDocument::new::<EmptyDocument>();
     document.insert(0, "\n").unwrap();
     document.insert(0, "123").unwrap();
     let json = document.get_operations_json();

frontend/rust-lib/flowy-document/tests/editor/undo_redo_test.rs

@@ -1,11 +1,11 @@
 use crate::editor::{TestBuilder, TestOp::*};
-use flowy_sync::client_document::{EmptyDoc, NewlineDoc, RECORD_THRESHOLD};
+use flowy_sync::client_document::{EmptyDocument, NewlineDocument, RECORD_THRESHOLD};
 use lib_ot::core::{Interval, NEW_LINE, WHITESPACE};
 
 #[test]
 fn history_insert_undo() {
     let ops = vec![Insert(0, "123", 0), Undo(0), AssertDocJson(0, r#"[{"insert":"\n"}]"#)];
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -19,7 +19,7 @@ fn history_insert_undo_with_lagging() {
         Undo(0),
         AssertDocJson(0, r#"[{"insert":"\n"}]"#),
     ];
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -32,7 +32,7 @@ fn history_insert_redo() {
         Redo(0),
         AssertDocJson(0, r#"[{"insert":"123\n"}]"#),
     ];
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -51,7 +51,7 @@ fn history_insert_redo_with_lagging() {
         Undo(0),
         AssertDocJson(0, r#"[{"insert":"123\n"}]"#),
     ];
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -62,7 +62,7 @@ fn history_bold_undo() {
         Undo(0),
         AssertDocJson(0, r#"[{"insert":"\n"}]"#),
     ];
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -74,7 +74,7 @@ fn history_bold_undo_with_lagging() {
         Undo(0),
         AssertDocJson(0, r#"[{"insert":"123\n"}]"#),
     ];
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -87,7 +87,7 @@ fn history_bold_redo() {
         Redo(0),
         AssertDocJson(0, r#" [{"insert":"123","attributes":{"bold":true}},{"insert":"\n"}]"#),
     ];
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -101,7 +101,7 @@ fn history_bold_redo_with_lagging() {
         Redo(0),
         AssertDocJson(0, r#"[{"insert":"123","attributes":{"bold":true}},{"insert":"\n"}]"#),
     ];
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -115,7 +115,7 @@ fn history_delete_undo() {
         Undo(0),
         AssertDocJson(0, r#"[{"insert":"123"}]"#),
     ];
-    TestBuilder::new().run_scripts::<EmptyDoc>(ops);
+    TestBuilder::new().run_scripts::<EmptyDocument>(ops);
 }
 
 #[test]
@@ -134,7 +134,7 @@ fn history_delete_undo_2() {
         Undo(0),
         AssertDocJson(0, r#"[{"insert":"\n"}]"#),
     ];
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -161,7 +161,7 @@ fn history_delete_undo_with_lagging() {
             "#,
         ),
     ];
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -175,7 +175,7 @@ fn history_delete_redo() {
         Redo(0),
         AssertDocJson(0, r#"[{"insert":"\n"}]"#),
     ];
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -194,7 +194,7 @@ fn history_replace_undo() {
         Undo(0),
         AssertDocJson(0, r#"[{"insert":"\n"}]"#),
     ];
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -215,7 +215,7 @@ fn history_replace_undo_with_lagging() {
         Undo(0),
         AssertDocJson(0, r#"[{"insert":"123","attributes":{"bold":true}},{"insert":"\n"}]"#),
     ];
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -234,7 +234,7 @@ fn history_replace_redo() {
             "#,
         ),
     ];
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -253,7 +253,7 @@ fn history_header_added_undo() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -272,7 +272,7 @@ fn history_link_added_undo() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -291,7 +291,7 @@ fn history_link_auto_format_undo_with_lagging() {
         AssertDocJson(0, r#"[{"insert":"https://appflowy.io\n"}]"#),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -314,7 +314,7 @@ fn history_bullet_undo() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -342,7 +342,7 @@ fn history_bullet_undo_with_lagging() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }
 
 #[test]
@@ -369,5 +369,5 @@ fn history_undo_attribute_on_merge_between_line() {
         ),
     ];
 
-    TestBuilder::new().run_scripts::<NewlineDoc>(ops);
+    TestBuilder::new().run_scripts::<NewlineDocument>(ops);
 }

frontend/rust-lib/flowy-document/tests/main.rs

@@ -1,2 +1,3 @@
-mod document;
 mod editor;
+mod new_document;
+mod old_document;

frontend/rust-lib/flowy-document/tests/new_document/mod.rs

@@ -0,0 +1,2 @@
+mod script;
+mod test;

frontend/rust-lib/flowy-document/tests/new_document/script.rs

@@ -0,0 +1,84 @@
+use flowy_document::editor::AppFlowyDocumentEditor;
+
+use flowy_test::helper::ViewTest;
+use flowy_test::FlowySDKTest;
+use lib_ot::core::{Body, Changeset, NodeDataBuilder, NodeOperation, Path, Transaction};
+use lib_ot::text_delta::TextOperations;
+use std::sync::Arc;
+
+pub enum EditScript {
+    InsertText { path: Path, delta: TextOperations },
+    UpdateText { path: Path, delta: TextOperations },
+    Delete { path: Path },
+    AssertContent { expected: &'static str },
+    AssertPrettyContent { expected: &'static str },
+}
+
+pub struct DocumentEditorTest {
+    pub sdk: FlowySDKTest,
+    pub editor: Arc<AppFlowyDocumentEditor>,
+}
+
+impl DocumentEditorTest {
+    pub async fn new() -> Self {
+        let sdk = FlowySDKTest::new(true);
+        let _ = sdk.init_user().await;
+
+        let test = ViewTest::new_document_view(&sdk).await;
+        let document_editor = sdk.document_manager.open_document_editor(&test.view.id).await.unwrap();
+        let editor = match document_editor.as_any().downcast_ref::<Arc<AppFlowyDocumentEditor>>() {
+            None => panic!(),
+            Some(editor) => editor.clone(),
+        };
+
+        Self { sdk, editor }
+    }
+
+    pub async fn run_scripts(&self, scripts: Vec<EditScript>) {
+        for script in scripts {
+            self.run_script(script).await;
+        }
+    }
+
+    async fn run_script(&self, script: EditScript) {
+        match script {
+            EditScript::InsertText { path, delta } => {
+                let node_data = NodeDataBuilder::new("text").insert_body(Body::Delta(delta)).build();
+                let operation = NodeOperation::Insert {
+                    path,
+                    nodes: vec![node_data],
+                };
+                self.editor
+                    .apply_transaction(Transaction::from_operations(vec![operation]))
+                    .await
+                    .unwrap();
+            }
+            EditScript::UpdateText { path, delta } => {
+                let inverted = delta.invert_str("");
+                let changeset = Changeset::Delta { delta, inverted };
+                let operation = NodeOperation::Update { path, changeset };
+                self.editor
+                    .apply_transaction(Transaction::from_operations(vec![operation]))
+                    .await
+                    .unwrap();
+            }
+            EditScript::Delete { path } => {
+                let operation = NodeOperation::Delete { path, nodes: vec![] };
+                self.editor
+                    .apply_transaction(Transaction::from_operations(vec![operation]))
+                    .await
+                    .unwrap();
+            }
+            EditScript::AssertContent { expected } => {
+                //
+                let content = self.editor.get_content(false).await.unwrap();
+                assert_eq!(content, expected);
+            }
+            EditScript::AssertPrettyContent { expected } => {
+                //
+                let content = self.editor.get_content(true).await.unwrap();
+                assert_eq!(content, expected);
+            }
+        }
+    }
+}

frontend/rust-lib/flowy-document/tests/new_document/test.rs

@@ -0,0 +1,156 @@
+use crate::new_document::script::DocumentEditorTest;
+use crate::new_document::script::EditScript::*;
+
+use lib_ot::text_delta::TextOperationBuilder;
+
+#[tokio::test]
+async fn document_initialize_test() {
+    let scripts = vec![AssertContent {
+        expected: r#"{"document":{"type":"editor","children":[{"type":"text"}]}}"#,
+    }];
+    DocumentEditorTest::new().await.run_scripts(scripts).await;
+}
+
+#[tokio::test]
+async fn document_insert_text_test() {
+    let delta = TextOperationBuilder::new().insert("Hello world").build();
+    let expected = r#"{
+  "document": {
+    "type": "editor",
+    "children": [
+      {
+        "type": "text",
+        "delta": [
+          {
+            "insert": "Hello world"
+          }
+        ]
+      },
+      {
+        "type": "text"
+      }
+    ]
+  }
+}"#;
+    let scripts = vec![
+        InsertText {
+            path: vec![0, 0].into(),
+            delta,
+        },
+        AssertPrettyContent { expected },
+    ];
+    DocumentEditorTest::new().await.run_scripts(scripts).await;
+}
+
+#[tokio::test]
+async fn document_update_text_test() {
+    let test = DocumentEditorTest::new().await;
+    let hello_world = "Hello world".to_string();
+    let scripts = vec![
+        UpdateText {
+            path: vec![0, 0].into(),
+            delta: TextOperationBuilder::new().insert(&hello_world).build(),
+        },
+        AssertPrettyContent {
+            expected: r#"{
+  "document": {
+    "type": "editor",
+    "children": [
+      {
+        "type": "text",
+        "delta": [
+          {
+            "insert": "Hello world"
+          }
+        ]
+      }
+    ]
+  }
+}"#,
+        },
+    ];
+
+    test.run_scripts(scripts).await;
+
+    let scripts = vec![
+        UpdateText {
+            path: vec![0, 0].into(),
+            delta: TextOperationBuilder::new()
+                .retain(hello_world.len())
+                .insert(", AppFlowy")
+                .build(),
+        },
+        AssertPrettyContent {
+            expected: r#"{
+  "document": {
+    "type": "editor",
+    "children": [
+      {
+        "type": "text",
+        "delta": [
+          {
+            "insert": "Hello world, AppFlowy"
+          }
+        ]
+      }
+    ]
+  }
+}"#,
+        },
+    ];
+    test.run_scripts(scripts).await;
+}
+
+#[tokio::test]
+async fn document_delete_text_test() {
+    let expected = r#"{
+  "document": {
+    "type": "editor",
+    "children": [
+      {
+        "type": "text",
+        "delta": [
+          {
+            "insert": "Hello"
+          }
+        ]
+      }
+    ]
+  }
+}"#;
+    let hello_world = "Hello world".to_string();
+    let scripts = vec![
+        UpdateText {
+            path: vec![0, 0].into(),
+            delta: TextOperationBuilder::new().insert(&hello_world).build(),
+        },
+        UpdateText {
+            path: vec![0, 0].into(),
+            delta: TextOperationBuilder::new().retain(5).delete(6).build(),
+        },
+        AssertPrettyContent { expected },
+    ];
+
+    DocumentEditorTest::new().await.run_scripts(scripts).await;
+}
+
+#[tokio::test]
+async fn document_delete_node_test() {
+    let scripts = vec![
+        UpdateText {
+            path: vec![0, 0].into(),
+            delta: TextOperationBuilder::new().insert("Hello world").build(),
+        },
+        AssertContent {
+            expected: r#"{"document":{"type":"editor","children":[{"type":"text","delta":[{"insert":"Hello world"}]}]}}"#,
+        },
+        Delete {
+            path: vec![0, 0].into(),
+        },
+        AssertContent {
+            expected: r#"{"document":{"type":"editor"}}"#,
+        },
+    ];
+
+    DocumentEditorTest::new().await.run_scripts(scripts).await;
+}

frontend/rust-lib/flowy-document/tests/old_document/mod.rs

@@ -0,0 +1,2 @@
+mod old_document_test;
+mod script;

frontend/rust-lib/flowy-document/tests/old_document/old_document_test.rs

@@ -1,4 +1,4 @@
-use crate::document::script::{EditorScript::*, *};
+use crate::old_document::script::{EditorScript::*, *};
 use flowy_revision::disk::RevisionState;
 use lib_ot::core::{count_utf16_code_units, Interval};
 
@@ -14,7 +14,7 @@ async fn text_block_sync_current_rev_id_check() {
         AssertNextSyncRevId(None),
         AssertJson(r#"[{"insert":"123\n"}]"#),
     ];
-    DocumentEditorTest::new().await.run_scripts(scripts).await;
+    OldDocumentEditorTest::new().await.run_scripts(scripts).await;
 }
 
 #[tokio::test]
@@ -28,7 +28,7 @@ async fn text_block_sync_state_check() {
         AssertRevisionState(3, RevisionState::Ack),
         AssertJson(r#"[{"insert":"123\n"}]"#),
     ];
-    DocumentEditorTest::new().await.run_scripts(scripts).await;
+    OldDocumentEditorTest::new().await.run_scripts(scripts).await;
 }
 
 #[tokio::test]
@@ -40,7 +40,7 @@ async fn text_block_sync_insert_test() {
         AssertJson(r#"[{"insert":"123\n"}]"#),
         AssertNextSyncRevId(None),
     ];
-    DocumentEditorTest::new().await.run_scripts(scripts).await;
+    OldDocumentEditorTest::new().await.run_scripts(scripts).await;
 }
 
 #[tokio::test]
@@ -52,7 +52,7 @@ async fn text_block_sync_insert_in_chinese() {
         InsertText("好", offset),
         AssertJson(r#"[{"insert":"你好\n"}]"#),
     ];
-    DocumentEditorTest::new().await.run_scripts(scripts).await;
+    OldDocumentEditorTest::new().await.run_scripts(scripts).await;
 }
 
 #[tokio::test]
@@ -64,7 +64,7 @@ async fn text_block_sync_insert_with_emoji() {
         InsertText("☺️", offset),
         AssertJson(r#"[{"insert":"😁☺️\n"}]"#),
     ];
-    DocumentEditorTest::new().await.run_scripts(scripts).await;
+    OldDocumentEditorTest::new().await.run_scripts(scripts).await;
 }
 
 #[tokio::test]
@@ -76,7 +76,7 @@ async fn text_block_sync_delete_in_english() {
         Delete(Interval::new(0, 2)),
         AssertJson(r#"[{"insert":"3\n"}]"#),
     ];
-    DocumentEditorTest::new().await.run_scripts(scripts).await;
+    OldDocumentEditorTest::new().await.run_scripts(scripts).await;
 }
 
 #[tokio::test]
@@ -89,7 +89,7 @@ async fn text_block_sync_delete_in_chinese() {
         Delete(Interval::new(0, offset)),
         AssertJson(r#"[{"insert":"好\n"}]"#),
     ];
-    DocumentEditorTest::new().await.run_scripts(scripts).await;
+    OldDocumentEditorTest::new().await.run_scripts(scripts).await;
 }
 
 #[tokio::test]
@@ -101,5 +101,5 @@ async fn text_block_sync_replace_test() {
         Replace(Interval::new(0, 3), "abc"),
         AssertJson(r#"[{"insert":"abc\n"}]"#),
     ];
-    DocumentEditorTest::new().await.run_scripts(scripts).await;
+    OldDocumentEditorTest::new().await.run_scripts(scripts).await;
 }

frontend/rust-lib/flowy-document/tests/old_document/script.rs

@@ -1,4 +1,4 @@
-use flowy_document::editor::DocumentEditor;
+use flowy_document::old_editor::editor::OldDocumentEditor;
 use flowy_document::TEXT_BLOCK_SYNC_INTERVAL_IN_MILLIS;
 use flowy_revision::disk::RevisionState;
 use flowy_test::{helper::ViewTest, FlowySDKTest};
@@ -17,21 +17,21 @@ pub enum EditorScript {
     AssertJson(&'static str),
 }
 
-pub struct DocumentEditorTest {
+pub struct OldDocumentEditorTest {
     pub sdk: FlowySDKTest,
-    pub editor: Arc<DocumentEditor>,
+    pub editor: Arc<OldDocumentEditor>,
 }
 
-impl DocumentEditorTest {
+impl OldDocumentEditorTest {
     pub async fn new() -> Self {
         let sdk = FlowySDKTest::default();
         let _ = sdk.init_user().await;
-        let test = ViewTest::new_text_block_view(&sdk).await;
-        let editor = sdk
-            .text_block_manager
-            .open_document_editor(&test.view.id)
-            .await
-            .unwrap();
+        let test = ViewTest::new_document_view(&sdk).await;
+        let document_editor = sdk.document_manager.open_document_editor(&test.view.id).await.unwrap();
+        let editor = match document_editor.as_any().downcast_ref::<Arc<OldDocumentEditor>>() {
+            None => panic!(),
+            Some(editor) => editor.clone(),
+        };
         Self { sdk, editor }
     }
 

frontend/rust-lib/flowy-error/src/errors.rs

@@ -67,6 +67,7 @@ impl FlowyError {
     static_flowy_error!(text_too_long, ErrorCode::TextTooLong);
     static_flowy_error!(invalid_data, ErrorCode::InvalidData);
     static_flowy_error!(out_of_bounds, ErrorCode::OutOfBounds);
+    static_flowy_error!(serde, ErrorCode::Serde);
 }
 
 impl std::convert::From<ErrorCode> for FlowyError {

frontend/rust-lib/flowy-folder/src/manager.rs

@@ -1,6 +1,6 @@
 use crate::entities::view::ViewDataTypePB;
 use crate::entities::ViewLayoutTypePB;
-use crate::services::folder_editor::FolderRevisionCompactor;
+use crate::services::folder_editor::FolderRevisionCompress;
 use crate::{
     dart_notification::{send_dart_notification, FolderNotification},
     entities::workspace::RepeatedWorkspacePB,
@@ -16,7 +16,8 @@ use flowy_error::FlowyError;
 use flowy_folder_data_model::user_default;
 use flowy_revision::disk::SQLiteDocumentRevisionPersistence;
 use flowy_revision::{RevisionManager, RevisionPersistence, RevisionWebSocket, SQLiteRevisionSnapshotPersistence};
-use flowy_sync::client_document::default::{initial_document_str, initial_read_me};
+use flowy_sync::client_document::default::initial_read_me;
+
 use flowy_sync::{client_folder::FolderPad, entities::ws_data::ServerRevisionWSData};
 use lazy_static::lazy_static;
 use lib_infra::future::FutureResult;
@@ -166,7 +167,7 @@ impl FolderManager {
         let object_id = folder_id.as_ref();
         let disk_cache = SQLiteDocumentRevisionPersistence::new(user_id, pool.clone());
         let rev_persistence = RevisionPersistence::new(user_id, object_id, disk_cache);
-        let rev_compactor = FolderRevisionCompactor();
+        let rev_compactor = FolderRevisionCompress();
         // let history_persistence = SQLiteRevisionHistoryPersistence::new(object_id, pool.clone());
         let snapshot_persistence = SQLiteRevisionSnapshotPersistence::new(object_id, pool);
         let rev_manager = RevisionManager::new(
@@ -215,16 +216,14 @@ impl DefaultFolderBuilder {
         set_current_workspace(&workspace_rev.id);
         for app in workspace_rev.apps.iter() {
             for (index, view) in app.belongings.iter().enumerate() {
-                let view_data = if index == 0 {
-                    initial_read_me().json_str()
-                } else {
-                    initial_document_str()
-                };
-                let _ = view_controller.set_latest_view(&view.id);
-                let layout_type = ViewLayoutTypePB::from(view.layout.clone());
-                let _ = view_controller
-                    .create_view(&view.id, ViewDataTypePB::Text, layout_type, Bytes::from(view_data))
-                    .await?;
+                if index == 0 {
+                    let view_data = initial_read_me().json_str();
+                    let _ = view_controller.set_latest_view(&view.id);
+                    let layout_type = ViewLayoutTypePB::from(view.layout.clone());
+                    let _ = view_controller
+                        .create_view(&view.id, ViewDataTypePB::Text, layout_type, Bytes::from(view_data))
+                        .await?;
+                }
             }
         }
         let folder = FolderPad::new(vec![workspace_rev.clone()], vec![])?;

frontend/rust-lib/flowy-folder/src/services/folder_editor.rs

@@ -112,16 +112,16 @@ impl RevisionObjectDeserializer for FolderRevisionSerde {
 }
 
 impl RevisionObjectSerializer for FolderRevisionSerde {
-    fn serialize_revisions(revisions: Vec<Revision>) -> FlowyResult<Bytes> {
+    fn combine_revisions(revisions: Vec<Revision>) -> FlowyResult<Bytes> {
         let operations = make_operations_from_revisions::<EmptyAttributes>(revisions)?;
         Ok(operations.json_bytes())
     }
 }
 
-pub struct FolderRevisionCompactor();
-impl RevisionCompress for FolderRevisionCompactor {
-    fn serialize_revisions(&self, revisions: Vec<Revision>) -> FlowyResult<Bytes> {
-        FolderRevisionSerde::serialize_revisions(revisions)
+pub struct FolderRevisionCompress();
+impl RevisionCompress for FolderRevisionCompress {
+    fn combine_revisions(&self, revisions: Vec<Revision>) -> FlowyResult<Bytes> {
+        FolderRevisionSerde::combine_revisions(revisions)
     }
 }
 

frontend/rust-lib/flowy-grid/src/manager.rs

@@ -1,6 +1,6 @@
 use crate::entities::GridLayout;
-use crate::services::block_editor::GridBlockRevisionCompactor;
-use crate::services::grid_editor::{GridRevisionCompactor, GridRevisionEditor};
+use crate::services::block_editor::GridBlockRevisionCompress;
+use crate::services::grid_editor::{GridRevisionCompress, GridRevisionEditor};
 use crate::services::grid_view_manager::make_grid_view_rev_manager;
 use crate::services::persistence::block_index::BlockIndexCache;
 use crate::services::persistence::kv::GridKVPersistence;
@@ -158,7 +158,7 @@ impl GridManager {
         let disk_cache = SQLiteGridRevisionPersistence::new(&user_id, pool.clone());
         let rev_persistence = RevisionPersistence::new(&user_id, grid_id, disk_cache);
         let snapshot_persistence = SQLiteRevisionSnapshotPersistence::new(grid_id, pool);
-        let rev_compactor = GridRevisionCompactor();
+        let rev_compactor = GridRevisionCompress();
         let rev_manager = RevisionManager::new(&user_id, grid_id, rev_persistence, rev_compactor, snapshot_persistence);
         Ok(rev_manager)
     }
@@ -167,7 +167,7 @@ impl GridManager {
         let user_id = self.grid_user.user_id()?;
         let disk_cache = SQLiteGridBlockRevisionPersistence::new(&user_id, pool.clone());
         let rev_persistence = RevisionPersistence::new(&user_id, block_id, disk_cache);
-        let rev_compactor = GridBlockRevisionCompactor();
+        let rev_compactor = GridBlockRevisionCompress();
         let snapshot_persistence = SQLiteRevisionSnapshotPersistence::new(block_id, pool);
         let rev_manager =
             RevisionManager::new(&user_id, block_id, rev_persistence, rev_compactor, snapshot_persistence);

frontend/rust-lib/flowy-grid/src/services/block_editor.rs

@@ -204,15 +204,15 @@ impl RevisionObjectDeserializer for GridBlockRevisionSerde {
 }
 
 impl RevisionObjectSerializer for GridBlockRevisionSerde {
-    fn serialize_revisions(revisions: Vec<Revision>) -> FlowyResult<Bytes> {
+    fn combine_revisions(revisions: Vec<Revision>) -> FlowyResult<Bytes> {
         let operations = make_operations_from_revisions::<EmptyAttributes>(revisions)?;
         Ok(operations.json_bytes())
     }
 }
 
-pub struct GridBlockRevisionCompactor();
-impl RevisionCompress for GridBlockRevisionCompactor {
-    fn serialize_revisions(&self, revisions: Vec<Revision>) -> FlowyResult<Bytes> {
-        GridBlockRevisionSerde::serialize_revisions(revisions)
+pub struct GridBlockRevisionCompress();
+impl RevisionCompress for GridBlockRevisionCompress {
+    fn combine_revisions(&self, revisions: Vec<Revision>) -> FlowyResult<Bytes> {
+        GridBlockRevisionSerde::combine_revisions(revisions)
     }
 }

frontend/rust-lib/flowy-grid/src/services/block_manager.rs

@@ -1,7 +1,7 @@
 use crate::dart_notification::{send_dart_notification, GridNotification};
 use crate::entities::{CellChangesetPB, GridBlockChangesetPB, InsertedRowPB, RowPB};
 use crate::manager::GridUser;
-use crate::services::block_editor::{GridBlockRevisionCompactor, GridBlockRevisionEditor};
+use crate::services::block_editor::{GridBlockRevisionCompress, GridBlockRevisionEditor};
 use crate::services::persistence::block_index::BlockIndexCache;
 use crate::services::row::{block_from_row_orders, make_row_from_row_rev, GridBlockSnapshot};
 use dashmap::DashMap;
@@ -274,7 +274,7 @@ async fn make_block_editor(user: &Arc<dyn GridUser>, block_id: &str) -> FlowyRes
 
     let disk_cache = SQLiteGridBlockRevisionPersistence::new(&user_id, pool.clone());
     let rev_persistence = RevisionPersistence::new(&user_id, block_id, disk_cache);
-    let rev_compactor = GridBlockRevisionCompactor();
+    let rev_compactor = GridBlockRevisionCompress();
     let snapshot_persistence = SQLiteRevisionSnapshotPersistence::new(block_id, pool);
     let rev_manager = RevisionManager::new(&user_id, block_id, rev_persistence, rev_compactor, snapshot_persistence);
     GridBlockRevisionEditor::new(&user_id, &token, block_id, rev_manager).await

frontend/rust-lib/flowy-grid/src/services/grid_editor.rs

@@ -842,7 +842,7 @@ impl RevisionObjectDeserializer for GridRevisionSerde {
     }
 }
 impl RevisionObjectSerializer for GridRevisionSerde {
-    fn serialize_revisions(revisions: Vec<Revision>) -> FlowyResult<Bytes> {
+    fn combine_revisions(revisions: Vec<Revision>) -> FlowyResult<Bytes> {
         let operations = make_operations_from_revisions::<EmptyAttributes>(revisions)?;
         Ok(operations.json_bytes())
     }
@@ -859,11 +859,11 @@ impl RevisionCloudService for GridRevisionCloudService {
     }
 }
 
-pub struct GridRevisionCompactor();
+pub struct GridRevisionCompress();
 
-impl RevisionCompress for GridRevisionCompactor {
-    fn serialize_revisions(&self, revisions: Vec<Revision>) -> FlowyResult<Bytes> {
-        GridRevisionSerde::serialize_revisions(revisions)
+impl RevisionCompress for GridRevisionCompress {
+    fn combine_revisions(&self, revisions: Vec<Revision>) -> FlowyResult<Bytes> {
+        GridRevisionSerde::combine_revisions(revisions)
     }
 }
 

frontend/rust-lib/flowy-grid/src/services/grid_view_editor.rs

@@ -488,16 +488,16 @@ impl RevisionObjectDeserializer for GridViewRevisionSerde {
 }
 
 impl RevisionObjectSerializer for GridViewRevisionSerde {
-    fn serialize_revisions(revisions: Vec<Revision>) -> FlowyResult<Bytes> {
+    fn combine_revisions(revisions: Vec<Revision>) -> FlowyResult<Bytes> {
         let operations = make_operations_from_revisions::<EmptyAttributes>(revisions)?;
         Ok(operations.json_bytes())
     }
 }
 
-pub struct GridViewRevisionCompactor();
-impl RevisionCompress for GridViewRevisionCompactor {
-    fn serialize_revisions(&self, revisions: Vec<Revision>) -> FlowyResult<Bytes> {
-        GridViewRevisionSerde::serialize_revisions(revisions)
+pub struct GridViewRevisionCompress();
+impl RevisionCompress for GridViewRevisionCompress {
+    fn combine_revisions(&self, revisions: Vec<Revision>) -> FlowyResult<Bytes> {
+        GridViewRevisionSerde::combine_revisions(revisions)
     }
 }
 

frontend/rust-lib/flowy-grid/src/services/grid_view_manager.rs

@@ -4,7 +4,7 @@ use crate::entities::{
 };
 use crate::manager::GridUser;
 use crate::services::grid_editor_task::GridServiceTaskScheduler;
-use crate::services::grid_view_editor::{GridViewRevisionCompactor, GridViewRevisionEditor};
+use crate::services::grid_view_editor::{GridViewRevisionCompress, GridViewRevisionEditor};
 
 use dashmap::DashMap;
 use flowy_error::FlowyResult;
@@ -250,7 +250,7 @@ pub async fn make_grid_view_rev_manager(user: &Arc<dyn GridUser>, view_id: &str)
 
     let disk_cache = SQLiteGridViewRevisionPersistence::new(&user_id, pool.clone());
     let rev_persistence = RevisionPersistence::new(&user_id, view_id, disk_cache);
-    let rev_compactor = GridViewRevisionCompactor();
+    let rev_compactor = GridViewRevisionCompress();
 
     let snapshot_persistence = SQLiteRevisionSnapshotPersistence::new(view_id, pool);
     Ok(RevisionManager::new(

frontend/rust-lib/flowy-net/src/local_server/server.rs

@@ -4,7 +4,6 @@ use bytes::Bytes;
 use flowy_error::{internal_error, FlowyError};
 use flowy_folder::event_map::FolderCouldServiceV1;
 use flowy_sync::{
-    client_document::default::initial_document_str,
     entities::{
         document::{CreateDocumentParams, DocumentIdPB, DocumentPayloadPB, ResetDocumentParams},
         ws_data::{ClientRevisionWSData, ClientRevisionWSDataType},
@@ -422,15 +421,9 @@ impl DocumentCloudService for LocalServer {
     fn fetch_document(
         &self,
         _token: &str,
-        params: DocumentIdPB,
+        _params: DocumentIdPB,
     ) -> FutureResult<Option<DocumentPayloadPB>, FlowyError> {
-        let doc = DocumentPayloadPB {
-            doc_id: params.value,
-            content: initial_document_str(),
-            rev_id: 0,
-            base_rev_id: 0,
-        };
-        FutureResult::new(async { Ok(Some(doc)) })
+        FutureResult::new(async { Ok(None) })
     }
 
     fn update_document_content(&self, _token: &str, _params: ResetDocumentParams) -> FutureResult<(), FlowyError> {

frontend/rust-lib/flowy-revision/src/rev_manager.rs

@@ -33,11 +33,11 @@ pub trait RevisionObjectDeserializer: Send + Sync {
 }
 
 pub trait RevisionObjectSerializer: Send + Sync {
-    /// Serialize the list of revisions to `Bytes`
+    /// Serialize a list of revisions into one in `Bytes` format
     ///
     /// * `revisions`: a list of revisions will be serialized to `Bytes`
     ///
-    fn serialize_revisions(revisions: Vec<Revision>) -> FlowyResult<Bytes>;
+    fn combine_revisions(revisions: Vec<Revision>) -> FlowyResult<Bytes>;
 }
 
 /// `RevisionCompress` is used to compress multiple revisions into one revision
@@ -62,11 +62,11 @@ pub trait RevisionCompress: Send + Sync {
 
         let (base_rev_id, rev_id) = first_revision.pair_rev_id();
         let md5 = last_revision.md5.clone();
-        let bytes = self.serialize_revisions(revisions)?;
+        let bytes = self.combine_revisions(revisions)?;
         Ok(Revision::new(object_id, base_rev_id, rev_id, bytes, user_id, md5))
     }
 
-    fn serialize_revisions(&self, revisions: Vec<Revision>) -> FlowyResult<Bytes>;
+    fn combine_revisions(&self, revisions: Vec<Revision>) -> FlowyResult<Bytes>;
 }
 
 pub struct RevisionManager {

frontend/rust-lib/flowy-sdk/src/deps_resolve/document_deps.rs

@@ -2,7 +2,7 @@ use bytes::Bytes;
 use flowy_database::ConnectionPool;
 use flowy_document::{
     errors::{internal_error, FlowyError},
-    DocumentCloudService, DocumentManager, DocumentUser,
+    DocumentCloudService, DocumentConfig, DocumentManager, DocumentUser,
 };
 use flowy_net::ClientServerConfiguration;
 use flowy_net::{
@@ -23,6 +23,7 @@ impl DocumentDepsResolver {
         ws_conn: Arc<FlowyWebSocketConnect>,
         user_session: Arc<UserSession>,
         server_config: &ClientServerConfiguration,
+        document_config: &DocumentConfig,
     ) -> Arc<DocumentManager> {
         let user = Arc::new(BlockUserImpl(user_session));
         let rev_web_socket = Arc::new(DocumentRevisionWebSocket(ws_conn.clone()));
@@ -31,7 +32,12 @@ impl DocumentDepsResolver {
             Some(local_server) => local_server,
         };
 
-        let manager = Arc::new(DocumentManager::new(cloud_service, user, rev_web_socket));
+        let manager = Arc::new(DocumentManager::new(
+            cloud_service,
+            user,
+            rev_web_socket,
+            document_config.clone(),
+        ));
         let receiver = Arc::new(DocumentWSMessageReceiverImpl(manager.clone()));
         ws_conn.add_ws_message_receiver(receiver).unwrap();
 

frontend/rust-lib/flowy-sdk/src/deps_resolve/folder_deps.rs

@@ -17,7 +17,6 @@ use flowy_net::{
     http_server::folder::FolderHttpCloudService, local_server::LocalServer, ws::connection::FlowyWebSocketConnect,
 };
 use flowy_revision::{RevisionWebSocket, WSStateReceiver};
-use flowy_sync::client_document::default::initial_document_str;
 use flowy_sync::entities::revision::{RepeatedRevision, Revision};
 use flowy_sync::entities::ws_data::ClientRevisionWSData;
 use flowy_user::services::UserSession;
@@ -175,7 +174,7 @@ impl ViewDataProcessor for DocumentViewDataProcessor {
         let manager = self.0.clone();
         FutureResult::new(async move {
             let editor = manager.open_document_editor(view_id).await?;
-            let delta_bytes = Bytes::from(editor.get_operation_str().await?);
+            let delta_bytes = Bytes::from(editor.get_operations_str().await?);
             Ok(delta_bytes)
         })
     }
@@ -190,8 +189,8 @@ impl ViewDataProcessor for DocumentViewDataProcessor {
         let user_id = user_id.to_string();
         let view_id = view_id.to_string();
         let manager = self.0.clone();
+        let view_data = self.0.initial_document_content();
         FutureResult::new(async move {
-            let view_data = initial_document_str();
             let delta_data = Bytes::from(view_data);
             let repeated_revision: RepeatedRevision =
                 Revision::initial_revision(&user_id, &view_id, delta_data.clone()).into();

frontend/rust-lib/flowy-sdk/src/lib.rs

@@ -3,7 +3,7 @@ pub mod module;
 pub use flowy_net::get_client_server_configuration;
 
 use crate::deps_resolve::*;
-use flowy_document::DocumentManager;
+use flowy_document::{DocumentConfig, DocumentManager};
 use flowy_folder::{errors::FlowyError, manager::FolderManager};
 use flowy_grid::manager::GridManager;
 use flowy_net::ClientServerConfiguration;
@@ -34,24 +34,28 @@ pub struct FlowySDKConfig {
     root: String,
     log_filter: String,
     server_config: ClientServerConfiguration,
+    document_config: DocumentConfig,
 }
 
 impl fmt::Debug for FlowySDKConfig {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.debug_struct("FlowySDKConfig")
             .field("root", &self.root)
-            .field("server_config", &self.server_config)
+            .field("server-config", &self.server_config)
+            .field("document-config", &self.document_config)
             .finish()
     }
 }
 
 impl FlowySDKConfig {
-    pub fn new(root: &str, server_config: ClientServerConfiguration, name: &str) -> Self {
+    pub fn new(root: &str, name: &str, server_config: ClientServerConfiguration, use_new_editor: bool) -> Self {
+        let document_config = DocumentConfig { use_new_editor };
         FlowySDKConfig {
             name: name.to_owned(),
             root: root.to_owned(),
             log_filter: crate_log_filter("info".to_owned()),
             server_config,
+            document_config,
         }
     }
 
@@ -89,7 +93,7 @@ pub struct FlowySDK {
     #[allow(dead_code)]
     config: FlowySDKConfig,
     pub user_session: Arc<UserSession>,
-    pub text_block_manager: Arc<DocumentManager>,
+    pub document_manager: Arc<DocumentManager>,
     pub folder_manager: Arc<FolderManager>,
     pub grid_manager: Arc<GridManager>,
     pub dispatcher: Arc<EventDispatcher>,
@@ -106,11 +110,12 @@ impl FlowySDK {
         let (local_server, ws_conn) = mk_local_server(&config.server_config);
         let (user_session, text_block_manager, folder_manager, local_server, grid_manager) = runtime.block_on(async {
             let user_session = mk_user_session(&config, &local_server, &config.server_config);
-            let text_block_manager = DocumentDepsResolver::resolve(
+            let document_manager = DocumentDepsResolver::resolve(
                 local_server.clone(),
                 ws_conn.clone(),
                 user_session.clone(),
                 &config.server_config,
+                &config.document_config,
             );
 
             let grid_manager = GridDepsResolver::resolve(ws_conn.clone(), user_session.clone()).await;
@@ -120,7 +125,7 @@ impl FlowySDK {
                 user_session.clone(),
                 &config.server_config,
                 &ws_conn,
-                &text_block_manager,
+                &document_manager,
                 &grid_manager,
             )
             .await;
@@ -131,7 +136,7 @@ impl FlowySDK {
             ws_conn.init().await;
             (
                 user_session,
-                text_block_manager,
+                document_manager,
                 folder_manager,
                 local_server,
                 grid_manager,
@@ -153,7 +158,7 @@ impl FlowySDK {
         Self {
             config,
             user_session,
-            text_block_manager,
+            document_manager: text_block_manager,
             folder_manager,
             grid_manager,
             dispatcher,

frontend/rust-lib/flowy-test/Cargo.toml

@@ -10,6 +10,7 @@ flowy-sdk = { path = "../flowy-sdk", default-features = false }
 flowy-user = { path = "../flowy-user"}
 flowy-net = { path = "../flowy-net"}
 flowy-folder = { path = "../flowy-folder", default-features = false}
+flowy-document= { path = "../flowy-document", default-features = false}
 lib-dispatch = { path = "../lib-dispatch" }
 
 flowy-sync = { path = "../../../shared-lib/flowy-sync" }

frontend/rust-lib/flowy-test/src/helper.rs

@@ -46,7 +46,7 @@ impl ViewTest {
         Self::new(sdk, ViewDataTypePB::Database, ViewLayoutTypePB::Board, data).await
     }
 
-    pub async fn new_text_block_view(sdk: &FlowySDKTest) -> Self {
+    pub async fn new_document_view(sdk: &FlowySDKTest) -> Self {
         Self::new(sdk, ViewDataTypePB::Text, ViewLayoutTypePB::Document, vec![]).await
     }
 }

frontend/rust-lib/flowy-test/src/lib.rs

@@ -2,7 +2,8 @@ pub mod event_builder;
 pub mod helper;
 
 use crate::helper::*;
-use flowy_net::{get_client_server_configuration, ClientServerConfiguration};
+
+use flowy_net::get_client_server_configuration;
 use flowy_sdk::{FlowySDK, FlowySDKConfig};
 use flowy_user::entities::UserProfilePB;
 use nanoid::nanoid;
@@ -27,16 +28,14 @@ impl std::ops::Deref for FlowySDKTest {
 
 impl std::default::Default for FlowySDKTest {
     fn default() -> Self {
-        let server_config = get_client_server_configuration().unwrap();
-        let sdk = Self::new(server_config);
-        std::mem::forget(sdk.dispatcher());
-        sdk
+        Self::new(false)
     }
 }
 
 impl FlowySDKTest {
-    pub fn new(server_config: ClientServerConfiguration) -> Self {
-        let config = FlowySDKConfig::new(&root_dir(), server_config, &nanoid!(6)).log_filter("info");
+    pub fn new(use_new_editor: bool) -> Self {
+        let server_config = get_client_server_configuration().unwrap();
+        let config = FlowySDKConfig::new(&root_dir(), &nanoid!(6), server_config, use_new_editor).log_filter("info");
         let sdk = std::thread::spawn(|| FlowySDK::new(config)).join().unwrap();
         std::mem::forget(sdk.dispatcher());
         Self { inner: sdk }

shared-lib/flowy-ast/src/ast.rs

@@ -1,3 +1,6 @@
+#![allow(clippy::all)]
+#![allow(unused_attributes)]
+#![allow(unused_assignments)]
 use crate::{attr, ty_ext::*, AttrsContainer, Ctxt};
 use syn::{self, punctuated::Punctuated};
 

shared-lib/flowy-error-code/src/code.rs

@@ -126,6 +126,9 @@ pub enum ErrorCode {
     #[display(fmt = "Invalid data")]
     InvalidData = 1000,
 
+    #[display(fmt = "Serde")]
+    Serde = 1001,
+
     #[display(fmt = "Out of bounds")]
     OutOfBounds = 10001,
 }

shared-lib/flowy-grid-data-model/src/revision/grid_setting_rev.rs

@@ -77,7 +77,7 @@ where
     }
 
     pub fn get_all_objects(&self) -> Vec<Arc<T>> {
-        self.inner.values().map(|map| map.all_objects()).flatten().collect()
+        self.inner.values().flat_map(|map| map.all_objects()).collect()
     }
 
     /// add object to the end of the list
@@ -117,7 +117,7 @@ where
     }
 
     pub fn all_objects(&self) -> Vec<Arc<T>> {
-        self.object_by_field_type.values().cloned().flatten().collect()
+        self.object_by_field_type.values().flatten().cloned().collect()
     }
 }
 

shared-lib/flowy-sync/src/client_document/default/mod.rs

@@ -1,14 +1,4 @@
-use lib_ot::{core::OperationBuilder, text_delta::TextOperations};
-
-#[inline]
-pub fn initial_document_operations() -> TextOperations {
-    OperationBuilder::new().insert("\n").build()
-}
-
-#[inline]
-pub fn initial_document_str() -> String {
-    initial_document_operations().json_str()
-}
+use lib_ot::text_delta::TextOperations;
 
 #[inline]
 pub fn initial_read_me() -> TextOperations {

shared-lib/flowy-sync/src/client_document/document_pad.rs

@@ -1,4 +1,3 @@
-use crate::client_document::default::initial_document_str;
 use crate::{
     client_document::{
         history::{History, UndoResult},
@@ -7,6 +6,7 @@ use crate::{
     errors::CollaborateError,
 };
 use bytes::Bytes;
+use lib_ot::text_delta::TextOperationBuilder;
 use lib_ot::{core::*, text_delta::TextOperations};
 use tokio::sync::mpsc;
 
@@ -14,20 +14,24 @@ pub trait InitialDocument {
     fn json_str() -> String;
 }
 
-pub struct EmptyDoc();
-impl InitialDocument for EmptyDoc {
+pub struct EmptyDocument();
+impl InitialDocument for EmptyDocument {
     fn json_str() -> String {
         TextOperations::default().json_str()
     }
 }
 
-pub struct NewlineDoc();
-impl InitialDocument for NewlineDoc {
+pub struct NewlineDocument();
+impl InitialDocument for NewlineDocument {
     fn json_str() -> String {
-        initial_document_str()
+        initial_old_document_content()
     }
 }
 
+pub fn initial_old_document_content() -> String {
+    TextOperationBuilder::new().insert("\n").build().json_str()
+}
+
 pub struct ClientDocument {
     operations: TextOperations,
     history: History,
@@ -206,7 +210,7 @@ impl ClientDocument {
 
     pub fn is_empty(&self) -> bool {
         // The document is empty if its text is equal to the initial text.
-        self.operations.json_str() == NewlineDoc::json_str()
+        self.operations.json_str() == NewlineDocument::json_str()
     }
 }
 

shared-lib/flowy-sync/src/client_grid/grid_revision_pad.rs

@@ -163,7 +163,7 @@ impl GridRevisionPad {
                 }
                 Some(field_rev) => {
                     let mut_field_rev = Arc::make_mut(field_rev);
-                    let old_field_type_rev = mut_field_rev.ty.clone();
+                    let old_field_type_rev = mut_field_rev.ty;
                     let old_field_type_option = mut_field_rev.get_type_option_str(mut_field_rev.ty);
                     match mut_field_rev.get_type_option_str(new_field_type) {
                         Some(new_field_type_option) => {

shared-lib/flowy-sync/src/server_document/document_manager.rs

@@ -270,7 +270,7 @@ impl OpenDocumentHandler {
             .send(msg)
             .await
             .map_err(|e| CollaborateError::internal().context(format!("Send document command failed: {}", e)))?;
-        Ok(rx.await.map_err(internal_error)?)
+        rx.await.map_err(internal_error)
     }
 }
 

shared-lib/flowy-sync/src/server_folder/folder_manager.rs

@@ -241,7 +241,7 @@ impl OpenFolderHandler {
             .send(msg)
             .await
             .map_err(|e| CollaborateError::internal().context(format!("Send folder command failed: {}", e)))?;
-        Ok(rx.await.map_err(internal_error)?)
+        rx.await.map_err(internal_error)
     }
 }
 

shared-lib/lib-infra/src/code_gen/protobuf_file/ast.rs

@@ -22,8 +22,7 @@ pub fn parse_protobuf_context_from(crate_paths: Vec<String>) -> Vec<ProtobufCrat
             let files = crate_info
                 .proto_input_paths()
                 .iter()
-                .map(|proto_crate_path| parse_files_protobuf(proto_crate_path, &proto_output_path))
-                .flatten()
+                .flat_map(|proto_crate_path| parse_files_protobuf(proto_crate_path, &proto_output_path))
                 .collect::<Vec<ProtoFile>>();
 
             ProtobufCrateContext::from_crate_info(crate_info, files)

shared-lib/lib-infra/src/code_gen/protobuf_file/mod.rs

@@ -182,9 +182,9 @@ pub fn check_pb_dart_plugin() {
                 ));
             }
 
-            msg.push_str(&"✅ You can fix that by adding:".to_string());
-            msg.push_str(&"\n\texport PATH=\"$PATH\":\"$HOME/.pub-cache/bin\"\n".to_string());
-            msg.push_str(&"to your shell's config file.(.bashrc, .bash, .profile, .zshrc etc.)".to_string());
+            msg.push_str("✅ You can fix that by adding:");
+            msg.push_str("\n\texport PATH=\"$PATH\":\"$HOME/.pub-cache/bin\"\n");
+            msg.push_str("to your shell's config file.(.bashrc, .bash, .profile, .zshrc etc.)");
             panic!("{}", msg)
         }
     }
@@ -198,13 +198,9 @@ fn gen_proto_files(crate_name: &str, crate_path: &str) -> Vec<ProtobufCrate> {
         .map(|info| info.protobuf_crate.clone())
         .collect::<Vec<_>>();
 
-    crate_context
-        .into_iter()
-        .map(|info| info.files)
-        .flatten()
-        .for_each(|file| {
-            println!("cargo:rerun-if-changed={}", file.file_path);
-        });
+    crate_context.into_iter().flat_map(|info| info.files).for_each(|file| {
+        println!("cargo:rerun-if-changed={}", file.file_path);
+    });
 
     proto_crates
 }

shared-lib/lib-infra/src/code_gen/protobuf_file/proto_gen.rs

@@ -52,7 +52,7 @@ impl ProtoGenerator {
 fn write_proto_files(crate_contexts: &[ProtobufCrateContext]) {
     let file_path_content_map = crate_contexts
         .iter()
-        .map(|ctx| {
+        .flat_map(|ctx| {
             ctx.files
                 .iter()
                 .map(|file| {
@@ -66,7 +66,6 @@ fn write_proto_files(crate_contexts: &[ProtobufCrateContext]) {
                 })
                 .collect::<HashMap<String, ProtoFileSymbol>>()
         })
-        .flatten()
         .collect::<HashMap<String, ProtoFileSymbol>>();
 
     for context in crate_contexts {
@@ -152,12 +151,11 @@ impl ProtoCache {
     fn from_crate_contexts(crate_contexts: &[ProtobufCrateContext]) -> Self {
         let proto_files = crate_contexts
             .iter()
-            .map(|crate_info| &crate_info.files)
-            .flatten()
+            .flat_map(|crate_info| &crate_info.files)
             .collect::<Vec<&ProtoFile>>();
 
-        let structs: Vec<String> = proto_files.iter().map(|info| info.structs.clone()).flatten().collect();
-        let enums: Vec<String> = proto_files.iter().map(|info| info.enums.clone()).flatten().collect();
+        let structs: Vec<String> = proto_files.iter().flat_map(|info| info.structs.clone()).collect();
+        let enums: Vec<String> = proto_files.iter().flat_map(|info| info.enums.clone()).collect();
         Self { structs, enums }
     }
 }

shared-lib/lib-ot/Cargo.toml

@@ -8,8 +8,6 @@ edition = "2018"
 [dependencies]
 bytecount = "0.6.0"
 serde = { version = "1.0", features = ["derive", "rc"] }
-#flowy-revision = { path = "../../frontend/rust-lib/flowy-revision" }
-#protobuf = {version = "2.18.0"}
 tokio = { version = "1", features = ["sync"] }
 dashmap = "5"
 md5 = "0.7.0"

shared-lib/lib-ot/src/core/attributes/attribute.rs

@@ -48,6 +48,10 @@ impl AttributeHashMap {
         AttributeHashMap(HashMap::new())
     }
 
+    pub fn into_inner(self) -> HashMap<AttributeKey, AttributeValue> {
+        self.0
+    }
+
     pub fn from_value(attribute_map: HashMap<AttributeKey, AttributeValue>) -> Self {
         Self(attribute_map)
     }

shared-lib/lib-ot/src/core/delta/operation/operation_serde.rs

@@ -84,7 +84,7 @@ where
                             let map: T = map.next_value()?;
                             attributes = Some(map);
                         }
-                        _ => panic!(),
+                        _ => {}
                     }
                 }
                 match operation {

shared-lib/lib-ot/src/core/delta/ops_serde.rs

@@ -1,6 +1,6 @@
 use crate::core::delta::operation::OperationAttributes;
 use crate::core::delta::DeltaOperations;
-use serde::de::DeserializeOwned;
+
 use serde::{
     de::{SeqAccess, Visitor},
     ser::SerializeSeq,

shared-lib/lib-ot/src/core/interval.rs

@@ -1,3 +1,4 @@
+use serde::{Deserialize, Serialize};
 use std::{
     cmp::{max, min},
     fmt,
@@ -9,7 +10,7 @@ use std::{
 ///
 /// It is an invariant that `start <= end`. An interval where `end < start` is
 /// considered empty.
-#[derive(Clone, Copy, PartialEq, Eq)]
+#[derive(Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
 pub struct Interval {
     pub start: usize,
     pub end: usize,

shared-lib/lib-ot/src/core/node_tree/mod.rs

@@ -6,10 +6,15 @@ mod operation;
 mod operation_serde;
 mod path;
 mod transaction;
+mod transaction_serde;
 mod tree;
+mod tree_serde;
 
 pub use node::*;
 pub use operation::*;
 pub use path::*;
 pub use transaction::*;
 pub use tree::*;
+pub use tree_serde::*;
+
+pub use indextree::NodeId;

shared-lib/lib-ot/src/core/node_tree/node.rs

@@ -1,6 +1,6 @@
 use super::node_serde::*;
 use crate::core::attributes::{AttributeHashMap, AttributeKey, AttributeValue};
-use crate::core::NodeBody::Delta;
+use crate::core::Body::Delta;
 use crate::core::OperationTransform;
 use crate::errors::OTError;
 use crate::text_delta::TextOperations;
@@ -17,9 +17,9 @@ pub struct NodeData {
 
     #[serde(serialize_with = "serialize_body")]
     #[serde(deserialize_with = "deserialize_body")]
-    #[serde(skip_serializing_if = "NodeBody::is_empty")]
+    #[serde(skip_serializing_if = "Body::is_empty")]
     #[serde(default)]
-    pub body: NodeBody,
+    pub body: Body,
 
     #[serde(skip_serializing_if = "Vec::is_empty")]
     #[serde(default)]
@@ -45,6 +45,9 @@ impl NodeData {
     }
 }
 
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct RepeatedNodeData(Vec<NodeData>);
+
 /// Builder for [`NodeData`]
 pub struct NodeDataBuilder {
     node: NodeData,
@@ -58,7 +61,7 @@ impl NodeDataBuilder {
     }
 
     /// Appends a new node to the end of the builder's node children.
-    pub fn add_node(mut self, node: NodeData) -> Self {
+    pub fn add_node_data(mut self, node: NodeData) -> Self {
         self.node.children.push(node);
         self
     }
@@ -72,7 +75,7 @@ impl NodeDataBuilder {
     }
 
     /// Inserts a body to the builder's node
-    pub fn insert_body(mut self, body: NodeBody) -> Self {
+    pub fn insert_body(mut self, body: Body) -> Self {
         self.node.body = body;
         self
     }
@@ -92,24 +95,24 @@ impl NodeDataBuilder {
 /// compose, transform and invert.
 ///
 #[derive(Debug, Clone, PartialEq, Eq)]
-pub enum NodeBody {
+pub enum Body {
     Empty,
     Delta(TextOperations),
 }
 
-impl std::default::Default for NodeBody {
+impl std::default::Default for Body {
     fn default() -> Self {
-        NodeBody::Empty
+        Body::Empty
     }
 }
 
-impl NodeBody {
+impl Body {
     fn is_empty(&self) -> bool {
-        matches!(self, NodeBody::Empty)
+        matches!(self, Body::Empty)
     }
 }
 
-impl OperationTransform for NodeBody {
+impl OperationTransform for Body {
     /// Only the same enum variant can perform the compose operation.
     fn compose(&self, other: &Self) -> Result<Self, OTError>
     where
@@ -117,7 +120,7 @@ impl OperationTransform for NodeBody {
     {
         match (self, other) {
             (Delta(a), Delta(b)) => a.compose(b).map(Delta),
-            (NodeBody::Empty, NodeBody::Empty) => Ok(NodeBody::Empty),
+            (Body::Empty, Body::Empty) => Ok(Body::Empty),
             (l, r) => {
                 let msg = format!("{:?} can not compose {:?}", l, r);
                 Err(OTError::internal().context(msg))
@@ -132,7 +135,7 @@ impl OperationTransform for NodeBody {
     {
         match (self, other) {
             (Delta(l), Delta(r)) => l.transform(r).map(|(ta, tb)| (Delta(ta), Delta(tb))),
-            (NodeBody::Empty, NodeBody::Empty) => Ok((NodeBody::Empty, NodeBody::Empty)),
+            (Body::Empty, Body::Empty) => Ok((Body::Empty, Body::Empty)),
             (l, r) => {
                 let msg = format!("{:?} can not compose {:?}", l, r);
                 Err(OTError::internal().context(msg))
@@ -144,7 +147,7 @@ impl OperationTransform for NodeBody {
     fn invert(&self, other: &Self) -> Self {
         match (self, other) {
             (Delta(l), Delta(r)) => Delta(l.invert(r)),
-            (NodeBody::Empty, NodeBody::Empty) => NodeBody::Empty,
+            (Body::Empty, Body::Empty) => Body::Empty,
             (l, r) => {
                 tracing::error!("{:?} can not compose {:?}", l, r);
                 l.clone()
@@ -158,20 +161,28 @@ impl OperationTransform for NodeBody {
 /// Each NodeBody except the Empty should have its corresponding changeset variant.
 #[derive(Debug, Clone, Serialize, Deserialize)]
 #[serde(rename_all = "snake_case")]
-pub enum NodeBodyChangeset {
+pub enum Changeset {
     Delta {
         delta: TextOperations,
         inverted: TextOperations,
     },
+    Attributes {
+        new: AttributeHashMap,
+        old: AttributeHashMap,
+    },
 }
 
-impl NodeBodyChangeset {
-    pub fn inverted(&self) -> NodeBodyChangeset {
+impl Changeset {
+    pub fn inverted(&self) -> Changeset {
         match self {
-            NodeBodyChangeset::Delta { delta, inverted } => NodeBodyChangeset::Delta {
+            Changeset::Delta { delta, inverted } => Changeset::Delta {
                 delta: inverted.clone(),
                 inverted: delta.clone(),
             },
+            Changeset::Attributes { new, old } => Changeset::Attributes {
+                new: old.clone(),
+                old: new.clone(),
+            },
         }
     }
 }
@@ -181,7 +192,7 @@ impl NodeBodyChangeset {
 #[derive(Clone, Eq, PartialEq, Debug)]
 pub struct Node {
     pub node_type: String,
-    pub body: NodeBody,
+    pub body: Body,
     pub attributes: AttributeHashMap,
 }
 
@@ -190,16 +201,22 @@ impl Node {
         Node {
             node_type: node_type.into(),
             attributes: AttributeHashMap::new(),
-            body: NodeBody::Empty,
+            body: Body::Empty,
         }
     }
 
-    pub fn apply_body_changeset(&mut self, changeset: NodeBodyChangeset) {
+    pub fn apply_changeset(&mut self, changeset: Changeset) -> Result<(), OTError> {
         match changeset {
-            NodeBodyChangeset::Delta { delta, inverted: _ } => match self.body.compose(&Delta(delta)) {
-                Ok(new_body) => self.body = new_body,
-                Err(e) => tracing::error!("{:?}", e),
-            },
+            Changeset::Delta { delta, inverted: _ } => {
+                let new_body = self.body.compose(&Delta(delta))?;
+                self.body = new_body;
+                Ok(())
+            }
+            Changeset::Attributes { new, old: _ } => {
+                let new_attributes = AttributeHashMap::compose(&self.attributes, &new)?;
+                self.attributes = new_attributes;
+                Ok(())
+            }
         }
     }
 }

shared-lib/lib-ot/src/core/node_tree/node_serde.rs

@@ -1,18 +1,18 @@
-use super::NodeBody;
+use super::Body;
 use crate::text_delta::TextOperations;
 use serde::de::{self, MapAccess, Visitor};
 use serde::ser::SerializeMap;
 use serde::{Deserializer, Serializer};
 use std::fmt;
 
-pub fn serialize_body<S>(body: &NodeBody, serializer: S) -> Result<S::Ok, S::Error>
+pub fn serialize_body<S>(body: &Body, serializer: S) -> Result<S::Ok, S::Error>
 where
     S: Serializer,
 {
     let mut map = serializer.serialize_map(Some(3))?;
     match body {
-        NodeBody::Empty => {}
-        NodeBody::Delta(delta) => {
+        Body::Empty => {}
+        Body::Delta(delta) => {
             map.serialize_key("delta")?;
             map.serialize_value(delta)?;
         }
@@ -20,31 +20,19 @@ where
     map.end()
 }
 
-pub fn deserialize_body<'de, D>(deserializer: D) -> Result<NodeBody, D::Error>
+pub fn deserialize_body<'de, D>(deserializer: D) -> Result<Body, D::Error>
 where
     D: Deserializer<'de>,
 {
     struct NodeBodyVisitor();
 
     impl<'de> Visitor<'de> for NodeBodyVisitor {
-        type Value = NodeBody;
+        type Value = Body;
 
         fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
             formatter.write_str("Expect NodeBody")
         }
 
-        fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error>
-        where
-            A: de::SeqAccess<'de>,
-        {
-            let mut delta = TextOperations::default();
-            while let Some(op) = seq.next_element()? {
-                delta.add(op);
-            }
-            Ok(NodeBody::Delta(delta))
-        }
-
-        #[inline]
         fn visit_map<V>(self, mut map: V) -> Result<Self::Value, V::Error>
         where
             V: MapAccess<'de>,
@@ -65,7 +53,7 @@ where
             }
 
             if let Some(delta) = delta {
-                return Ok(NodeBody::Delta(delta));
+                return Ok(Body::Delta(delta));
             }
 
             Err(de::Error::missing_field("delta"))

shared-lib/lib-ot/src/core/node_tree/operation.rs

@@ -1,8 +1,8 @@
-use crate::core::attributes::AttributeHashMap;
-use crate::core::{NodeBodyChangeset, NodeData, Path};
+use super::operation_serde::{deserialize_changeset, serialize_changeset};
+use crate::core::{Changeset, NodeData, Path};
 use crate::errors::OTError;
 use serde::{Deserialize, Serialize};
-use std::rc::Rc;
+use std::sync::Arc;
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
 #[serde(tag = "op")]
@@ -10,17 +10,10 @@ pub enum NodeOperation {
     #[serde(rename = "insert")]
     Insert { path: Path, nodes: Vec<NodeData> },
 
-    #[serde(rename = "update-attribute")]
-    UpdateAttributes {
-        path: Path,
-        new: AttributeHashMap,
-        old: AttributeHashMap,
-    },
-
-    #[serde(rename = "update-body")]
-    // #[serde(serialize_with = "serialize_edit_body")]
-    // #[serde(deserialize_with = "deserialize_edit_body")]
-    UpdateBody { path: Path, changeset: NodeBodyChangeset },
+    #[serde(rename = "update")]
+    #[serde(serialize_with = "serialize_changeset")]
+    #[serde(deserialize_with = "deserialize_changeset")]
+    Update { path: Path, changeset: Changeset },
 
     #[serde(rename = "delete")]
     Delete { path: Path, nodes: Vec<NodeData> },
@@ -30,18 +23,16 @@ impl NodeOperation {
     pub fn get_path(&self) -> &Path {
         match self {
             NodeOperation::Insert { path, .. } => path,
-            NodeOperation::UpdateAttributes { path, .. } => path,
             NodeOperation::Delete { path, .. } => path,
-            NodeOperation::UpdateBody { path, .. } => path,
+            NodeOperation::Update { path, .. } => path,
         }
     }
 
     pub fn get_mut_path(&mut self) -> &mut Path {
         match self {
             NodeOperation::Insert { path, .. } => path,
-            NodeOperation::UpdateAttributes { path, .. } => path,
             NodeOperation::Delete { path, .. } => path,
-            NodeOperation::UpdateBody { path, .. } => path,
+            NodeOperation::Update { path, .. } => path,
         }
     }
 
@@ -51,20 +42,11 @@ impl NodeOperation {
                 path: path.clone(),
                 nodes: nodes.clone(),
             },
-            NodeOperation::UpdateAttributes {
-                path,
-                new: attributes,
-                old: old_attributes,
-            } => NodeOperation::UpdateAttributes {
-                path: path.clone(),
-                new: old_attributes.clone(),
-                old: attributes.clone(),
-            },
             NodeOperation::Delete { path, nodes } => NodeOperation::Insert {
                 path: path.clone(),
                 nodes: nodes.clone(),
             },
-            NodeOperation::UpdateBody { path, changeset: body } => NodeOperation::UpdateBody {
+            NodeOperation::Update { path, changeset: body } => NodeOperation::Update {
                 path: path.clone(),
                 changeset: body.inverted(),
             },
@@ -101,7 +83,7 @@ impl NodeOperation {
     ///
     /// op_1.transform(&mut op_2);
     /// assert_eq!(serde_json::to_string(&op_2).unwrap(), r#"{"op":"insert","path":[0,2],"nodes":[{"type":"text_2"}]}"#);
-    ///
+    /// assert_eq!(serde_json::to_string(&op_1).unwrap(), r#"{"op":"insert","path":[0,1],"nodes":[{"type":"text_1"}]}"#);
     /// ```
     pub fn transform(&self, other: &mut NodeOperation) {
         match self {
@@ -122,21 +104,21 @@ impl NodeOperation {
 
 #[derive(Debug, Clone, Serialize, Deserialize, Default)]
 pub struct NodeOperations {
-    operations: Vec<Rc<NodeOperation>>,
+    operations: Vec<Arc<NodeOperation>>,
 }
 
 impl NodeOperations {
-    pub fn into_inner(self) -> Vec<Rc<NodeOperation>> {
+    pub fn into_inner(self) -> Vec<Arc<NodeOperation>> {
         self.operations
     }
 
     pub fn add_op(&mut self, operation: NodeOperation) {
-        self.operations.push(Rc::new(operation));
+        self.operations.push(Arc::new(operation));
     }
 }
 
 impl std::ops::Deref for NodeOperations {
-    type Target = Vec<Rc<NodeOperation>>;
+    type Target = Vec<Arc<NodeOperation>>;
 
     fn deref(&self) -> &Self::Target {
         &self.operations
@@ -158,7 +140,7 @@ impl std::convert::From<Vec<NodeOperation>> for NodeOperations {
 impl NodeOperations {
     pub fn new(operations: Vec<NodeOperation>) -> Self {
         Self {
-            operations: operations.into_iter().map(Rc::new).collect(),
+            operations: operations.into_iter().map(Arc::new).collect(),
         }
     }
 

shared-lib/lib-ot/src/core/node_tree/operation_serde.rs

@@ -1,4 +1,4 @@
-use crate::core::{NodeBodyChangeset, Path};
+use crate::core::{Changeset, Path};
 use crate::text_delta::TextOperations;
 use serde::de::{self, MapAccess, Visitor};
 use serde::ser::SerializeMap;
@@ -7,8 +7,7 @@ use std::convert::TryInto;
 use std::fmt;
 use std::marker::PhantomData;
 
-#[allow(dead_code)]
-pub fn serialize_edit_body<S>(path: &Path, changeset: &NodeBodyChangeset, serializer: S) -> Result<S::Ok, S::Error>
+pub fn serialize_changeset<S>(path: &Path, changeset: &Changeset, serializer: S) -> Result<S::Ok, S::Error>
 where
     S: Serializer,
 {
@@ -17,28 +16,34 @@ where
     map.serialize_value(path)?;
 
     match changeset {
-        NodeBodyChangeset::Delta { delta, inverted } => {
+        Changeset::Delta { delta, inverted } => {
             map.serialize_key("delta")?;
             map.serialize_value(delta)?;
             map.serialize_key("inverted")?;
             map.serialize_value(inverted)?;
             map.end()
         }
+        Changeset::Attributes { new, old } => {
+            map.serialize_key("new")?;
+            map.serialize_value(new)?;
+            map.serialize_key("old")?;
+            map.serialize_value(old)?;
+            map.end()
+        }
     }
 }
 
-#[allow(dead_code)]
-pub fn deserialize_edit_body<'de, D>(deserializer: D) -> Result<(Path, NodeBodyChangeset), D::Error>
+pub fn deserialize_changeset<'de, D>(deserializer: D) -> Result<(Path, Changeset), D::Error>
 where
     D: Deserializer<'de>,
 {
-    struct NodeBodyChangesetVisitor();
+    struct ChangesetVisitor();
 
-    impl<'de> Visitor<'de> for NodeBodyChangesetVisitor {
-        type Value = (Path, NodeBodyChangeset);
+    impl<'de> Visitor<'de> for ChangesetVisitor {
+        type Value = (Path, Changeset);
 
         fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
-            formatter.write_str("Expect Path and NodeBodyChangeset")
+            formatter.write_str("Expect Path and Changeset")
         }
 
         #[inline]
@@ -47,7 +52,7 @@ where
             V: MapAccess<'de>,
         {
             let mut path: Option<Path> = None;
-            let mut delta_changeset = DeltaBodyChangeset::<V::Error>::new();
+            let mut delta_changeset = DeltaChangeset::<V::Error>::new();
             while let Some(key) = map.next_key()? {
                 match key {
                     "delta" => {
@@ -66,7 +71,6 @@ where
                         if path.is_some() {
                             return Err(de::Error::duplicate_field("path"));
                         }
-
                         path = Some(map.next_value::<Path>()?)
                     }
                     other => {
@@ -83,17 +87,16 @@ where
             Ok((path.unwrap(), changeset))
         }
     }
-    deserializer.deserialize_any(NodeBodyChangesetVisitor())
+    deserializer.deserialize_any(ChangesetVisitor())
 }
 
-#[allow(dead_code)]
-struct DeltaBodyChangeset<E> {
+struct DeltaChangeset<E> {
     delta: Option<TextOperations>,
     inverted: Option<TextOperations>,
     error: PhantomData<E>,
 }
 
-impl<E> DeltaBodyChangeset<E> {
+impl<E> DeltaChangeset<E> {
     fn new() -> Self {
         Self {
             delta: None,
@@ -103,13 +106,13 @@ impl<E> DeltaBodyChangeset<E> {
     }
 }
 
-impl<E> std::convert::TryInto<NodeBodyChangeset> for DeltaBodyChangeset<E>
+impl<E> std::convert::TryInto<Changeset> for DeltaChangeset<E>
 where
     E: de::Error,
 {
     type Error = E;
 
-    fn try_into(self) -> Result<NodeBodyChangeset, Self::Error> {
+    fn try_into(self) -> Result<Changeset, Self::Error> {
         if self.delta.is_none() {
             return Err(de::Error::missing_field("delta"));
         }
@@ -117,7 +120,7 @@ where
         if self.inverted.is_none() {
             return Err(de::Error::missing_field("inverted"));
         }
-        let changeset = NodeBodyChangeset::Delta {
+        let changeset = Changeset::Delta {
             delta: self.delta.unwrap(),
             inverted: self.inverted.unwrap(),
         };

shared-lib/lib-ot/src/core/node_tree/path.rs

@@ -26,6 +26,19 @@ use serde::{Deserialize, Serialize};
 #[derive(Clone, Serialize, Deserialize, Eq, PartialEq, Debug)]
 pub struct Path(pub Vec<usize>);
 
+impl Path {
+    pub fn is_valid(&self) -> bool {
+        if self.is_empty() {
+            return false;
+        }
+        return true;
+    }
+
+    pub fn is_root(&self) -> bool {
+        return self.0.len() == 1 && self.0[0] == 0;
+    }
+}
+
 impl std::ops::Deref for Path {
     type Target = Vec<usize>;
 

shared-lib/lib-ot/src/core/node_tree/transaction.rs

@@ -1,14 +1,21 @@
+use super::{Changeset, NodeOperations};
 use crate::core::attributes::AttributeHashMap;
-use crate::core::{NodeData, NodeOperation, NodeTree, Path};
+use crate::core::{Interval, NodeData, NodeOperation, NodeTree, Path};
 use crate::errors::OTError;
+
 use indextree::NodeId;
-use std::rc::Rc;
+use serde::{Deserialize, Serialize};
+use std::sync::Arc;
 
-use super::{NodeBodyChangeset, NodeOperations};
-
-#[derive(Debug, Clone, Default)]
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
 pub struct Transaction {
-    operations: NodeOperations,
+    #[serde(flatten)]
+    pub operations: NodeOperations,
+
+    #[serde(default)]
+    #[serde(flatten)]
+    #[serde(skip_serializing_if = "Extension::is_empty")]
+    pub extension: Extension,
 }
 
 impl Transaction {
@@ -19,10 +26,25 @@ impl Transaction {
     pub fn from_operations<T: Into<NodeOperations>>(operations: T) -> Self {
         Self {
             operations: operations.into(),
+            extension: Extension::Empty,
         }
     }
 
-    pub fn into_operations(self) -> Vec<Rc<NodeOperation>> {
+    pub fn from_bytes(bytes: &[u8]) -> Result<Self, OTError> {
+        let transaction = serde_json::from_slice(bytes).map_err(|err| OTError::serde().context(err))?;
+        Ok(transaction)
+    }
+
+    pub fn to_bytes(&self) -> Result<Vec<u8>, OTError> {
+        let bytes = serde_json::to_vec(&self).map_err(|err| OTError::serde().context(err))?;
+        Ok(bytes)
+    }
+
+    pub fn to_json(&self) -> Result<String, OTError> {
+        serde_json::to_string(&self).map_err(|err| OTError::serde().context(err))
+    }
+
+    pub fn into_operations(self) -> Vec<Arc<NodeOperation>> {
         self.operations.into_inner()
     }
 
@@ -32,8 +54,9 @@ impl Transaction {
     /// the operations of the transaction will be transformed into the conflict operations.
     pub fn transform(&self, other: &Transaction) -> Result<Transaction, OTError> {
         let mut new_transaction = other.clone();
+        new_transaction.extension = self.extension.clone();
         for other_operation in new_transaction.iter_mut() {
-            let other_operation = Rc::make_mut(other_operation);
+            let other_operation = Arc::make_mut(other_operation);
             for operation in self.operations.iter() {
                 operation.transform(other_operation);
             }
@@ -41,17 +64,19 @@ impl Transaction {
         Ok(new_transaction)
     }
 
-    pub fn compose(&mut self, other: &Transaction) -> Result<(), OTError> {
+    pub fn compose(&mut self, other: Transaction) -> Result<(), OTError> {
         // For the moment, just append `other` operations to the end of `self`.
-        for operation in other.operations.iter() {
-            self.operations.push(operation.clone());
+        let Transaction { operations, extension } = other;
+        for operation in operations.into_inner().into_iter() {
+            self.operations.push(operation);
         }
+        self.extension = extension;
         Ok(())
     }
 }
 
 impl std::ops::Deref for Transaction {
-    type Target = Vec<Rc<NodeOperation>>;
+    type Target = Vec<Arc<NodeOperation>>;
 
     fn deref(&self) -> &Self::Target {
         &self.operations
@@ -64,6 +89,27 @@ impl std::ops::DerefMut for Transaction {
     }
 }
 
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub enum Extension {
+    Empty,
+    TextSelection {
+        before_selection: Interval,
+        after_selection: Interval,
+    },
+}
+
+impl std::default::Default for Extension {
+    fn default() -> Self {
+        Extension::Empty
+    }
+}
+
+impl Extension {
+    fn is_empty(&self) -> bool {
+        matches!(self, Extension::Empty)
+    }
+}
+
 pub struct TransactionBuilder<'a> {
     node_tree: &'a NodeTree,
     operations: NodeOperations,
@@ -87,17 +133,15 @@ impl<'a> TransactionBuilder<'a> {
     /// # Examples
     ///
     /// ```
-    /// // -- 0 (root)
-    /// //      0 -- text_1
-    /// //      1 -- text_2
+    /// //   0 -- text_1
     /// use lib_ot::core::{NodeTree, NodeData, TransactionBuilder};
-    /// let mut node_tree = NodeTree::new("root");
+    /// let mut node_tree = NodeTree::default();
     /// let transaction = TransactionBuilder::new(&node_tree)
-    ///     .insert_nodes_at_path(0,vec![ NodeData::new("text_1"),  NodeData::new("text_2")])
+    ///     .insert_nodes_at_path(0,vec![ NodeData::new("text_1")])
     ///     .finalize();
     ///  node_tree.apply_transaction(transaction).unwrap();
     ///
-    ///  node_tree.node_id_at_path(vec![0, 0]);
+    ///  node_tree.node_id_at_path(vec![0]).unwrap();
     /// ```
     ///
     pub fn insert_nodes_at_path<T: Into<Path>>(self, path: T, nodes: Vec<NodeData>) -> Self {
@@ -121,7 +165,7 @@ impl<'a> TransactionBuilder<'a> {
     /// // -- 0
     /// //    |-- text
     /// use lib_ot::core::{NodeTree, NodeData, TransactionBuilder};
-    /// let mut node_tree = NodeTree::new("root");
+    /// let mut node_tree = NodeTree::default();
     /// let transaction = TransactionBuilder::new(&node_tree)
     ///     .insert_node_at_path(0, NodeData::new("text"))
     ///     .finalize();
@@ -143,10 +187,12 @@ impl<'a> TransactionBuilder<'a> {
                     }
                 }
 
-                self.operations.add_op(NodeOperation::UpdateAttributes {
+                self.operations.add_op(NodeOperation::Update {
                     path: path.clone(),
-                    new: attributes,
-                    old: old_attributes,
+                    changeset: Changeset::Attributes {
+                        new: attributes,
+                        old: old_attributes,
+                    },
                 });
             }
             None => tracing::warn!("Update attributes at path: {:?} failed. Node is not exist", path),
@@ -154,10 +200,10 @@ impl<'a> TransactionBuilder<'a> {
         self
     }
 
-    pub fn update_body_at_path(mut self, path: &Path, changeset: NodeBodyChangeset) -> Self {
+    pub fn update_body_at_path(mut self, path: &Path, changeset: Changeset) -> Self {
         match self.node_tree.node_id_at_path(path) {
             Some(_) => {
-                self.operations.add_op(NodeOperation::UpdateBody {
+                self.operations.add_op(NodeOperation::Update {
                     path: path.clone(),
                     changeset,
                 });
@@ -172,11 +218,17 @@ impl<'a> TransactionBuilder<'a> {
     }
 
     pub fn delete_nodes_at_path(mut self, path: &Path, length: usize) -> Self {
-        let mut node = self.node_tree.node_id_at_path(path).unwrap();
+        let node_id = self.node_tree.node_id_at_path(path);
+        if node_id.is_none() {
+            tracing::warn!("Path: {:?} doesn't contains any nodes", path);
+            return self;
+        }
+
+        let mut node_id = node_id.unwrap();
         let mut deleted_nodes = vec![];
         for _ in 0..length {
-            deleted_nodes.push(self.get_deleted_nodes(node));
-            node = self.node_tree.following_siblings(node).next().unwrap();
+            deleted_nodes.push(self.get_deleted_node_data(node_id));
+            node_id = self.node_tree.following_siblings(node_id).next().unwrap();
         }
 
         self.operations.add_op(NodeOperation::Delete {
@@ -186,13 +238,16 @@ impl<'a> TransactionBuilder<'a> {
         self
     }
 
-    fn get_deleted_nodes(&self, node_id: NodeId) -> NodeData {
+    fn get_deleted_node_data(&self, node_id: NodeId) -> NodeData {
         let node_data = self.node_tree.get_node(node_id).unwrap();
 
         let mut children = vec![];
-        self.node_tree.children_from_node(node_id).for_each(|child_id| {
-            children.push(self.get_deleted_nodes(child_id));
-        });
+        self.node_tree
+            .get_children_ids(node_id)
+            .into_iter()
+            .for_each(|child_id| {
+                children.push(self.get_deleted_node_data(child_id));
+            });
 
         NodeData {
             node_type: node_data.node_type.clone(),

shared-lib/lib-ot/src/core/node_tree/transaction_serde.rs

@@ -0,0 +1,29 @@
+use crate::core::Extension;
+use serde::ser::SerializeMap;
+use serde::Serializer;
+
+#[allow(dead_code)]
+pub fn serialize_extension<S>(extension: &Extension, serializer: S) -> Result<S::Ok, S::Error>
+where
+    S: Serializer,
+{
+    match extension {
+        Extension::Empty => {
+            let map = serializer.serialize_map(None)?;
+            map.end()
+        }
+        Extension::TextSelection {
+            before_selection,
+            after_selection,
+        } => {
+            let mut map = serializer.serialize_map(Some(2))?;
+            map.serialize_key("before_selection")?;
+            map.serialize_value(before_selection)?;
+
+            map.serialize_key("after_selection")?;
+            map.serialize_value(after_selection)?;
+
+            map.end()
+        }
+    }
+}

shared-lib/lib-ot/src/core/node_tree/tree.rs

@@ -1,37 +1,45 @@
-use crate::core::attributes::AttributeHashMap;
-use crate::core::{Node, NodeBodyChangeset, NodeData, NodeOperation, OperationTransform, Path, Transaction};
-use crate::errors::{ErrorBuilder, OTError, OTErrorCode};
-use indextree::{Arena, Children, FollowingSiblings, NodeId};
-use std::rc::Rc;
-
 use super::NodeOperations;
+use crate::core::{Changeset, Node, NodeData, NodeOperation, Path, Transaction};
+use crate::errors::{ErrorBuilder, OTError, OTErrorCode};
+use indextree::{Arena, FollowingSiblings, NodeId};
+use std::sync::Arc;
 
-///
+#[derive(Default, Debug)]
+pub struct NodeTreeContext {}
+
+#[derive(Debug)]
 pub struct NodeTree {
     arena: Arena<Node>,
     root: NodeId,
+    pub context: NodeTreeContext,
 }
 
 impl Default for NodeTree {
     fn default() -> Self {
-        Self::new("root")
+        Self::new(NodeTreeContext::default())
     }
 }
 
 impl NodeTree {
-    pub fn new(root_name: &str) -> NodeTree {
+    pub fn new(context: NodeTreeContext) -> NodeTree {
         let mut arena = Arena::new();
-        let root = arena.new_node(Node::new(root_name));
-        NodeTree { arena, root }
+        let root = arena.new_node(Node::new("root"));
+        NodeTree { arena, root, context }
     }
 
-    pub fn from_bytes(root_name: &str, bytes: Vec<u8>) -> Result<Self, OTError> {
+    pub fn from_node_data(node_data: NodeData, context: NodeTreeContext) -> Result<Self, OTError> {
+        let mut tree = Self::new(context);
+        let _ = tree.insert_nodes(&0_usize.into(), vec![node_data])?;
+        Ok(tree)
+    }
+
+    pub fn from_bytes(bytes: Vec<u8>, context: NodeTreeContext) -> Result<Self, OTError> {
         let operations = NodeOperations::from_bytes(bytes)?;
-        Self::from_operations(root_name, operations)
+        Self::from_operations(operations, context)
     }
 
-    pub fn from_operations(root_name: &str, operations: NodeOperations) -> Result<Self, OTError> {
-        let mut node_tree = NodeTree::new(root_name);
+    pub fn from_operations(operations: NodeOperations, context: NodeTreeContext) -> Result<Self, OTError> {
+        let mut node_tree = NodeTree::new(context);
         for operation in operations.into_inner().into_iter() {
             let _ = node_tree.apply_op(operation)?;
         }
@@ -39,13 +47,75 @@ impl NodeTree {
     }
 
     pub fn get_node(&self, node_id: NodeId) -> Option<&Node> {
+        if node_id.is_removed(&self.arena) {
+            return None;
+        }
         Some(self.arena.get(node_id)?.get())
     }
 
     pub fn get_node_at_path(&self, path: &Path) -> Option<&Node> {
-        {
-            let node_id = self.node_id_at_path(path)?;
-            self.get_node(node_id)
+        let node_id = self.node_id_at_path(path)?;
+        self.get_node(node_id)
+    }
+
+    pub fn get_node_data_at_path(&self, path: &Path) -> Option<NodeData> {
+        let node_id = self.node_id_at_path(path)?;
+        let node_data = self.get_node_data(node_id)?;
+        Some(node_data)
+    }
+
+    pub fn get_node_data_at_root(&self) -> Option<NodeData> {
+        self.get_node_data(self.root)
+    }
+
+    pub fn get_node_data(&self, node_id: NodeId) -> Option<NodeData> {
+        let Node {
+            node_type,
+            body,
+            attributes,
+        } = self.get_node(node_id)?.clone();
+        let mut node_data = NodeData::new(node_type);
+        for (key, value) in attributes.into_inner() {
+            node_data.attributes.insert(key, value);
+        }
+        node_data.body = body;
+
+        let children = self.get_children_ids(node_id);
+        for child in children.into_iter() {
+            if let Some(child_node_data) = self.get_node_data(child) {
+                node_data.children.push(child_node_data);
+            }
+        }
+        Some(node_data)
+    }
+
+    pub fn root_node_id(&self) -> NodeId {
+        self.root
+    }
+
+    pub fn get_children(&self, node_id: NodeId) -> Vec<&Node> {
+        node_id
+            .children(&self.arena)
+            .flat_map(|node_id| self.get_node(node_id))
+            .collect()
+    }
+    /// Returns a iterator used to iterate over the node ids whose parent node id is node_id
+    ///
+    /// * `node_id`: the children's parent node id
+    ///
+    pub fn get_children_ids(&self, node_id: NodeId) -> Vec<NodeId> {
+        node_id.children(&self.arena).collect()
+    }
+
+    /// Serialize the node to JSON with node_id
+    pub fn serialize_node(&self, node_id: NodeId, pretty_json: bool) -> Result<String, OTError> {
+        let node_data = self
+            .get_node_data(node_id)
+            .ok_or_else(|| OTError::internal().context("Node doesn't exist exist"))?;
+        if pretty_json {
+            serde_json::to_string_pretty(&node_data).map_err(|err| OTError::serde().context(err))
+        } else {
+            serde_json::to_string(&node_data).map_err(|err| OTError::serde().context(err))
         }
     }
 
@@ -53,28 +123,32 @@ impl NodeTree {
     /// # Examples
     ///
     /// ```
-    /// use std::rc::Rc;
+    /// use std::sync::Arc;
     /// use lib_ot::core::{NodeOperation, NodeTree, NodeData, Path};
     /// let nodes = vec![NodeData::new("text".to_string())];
     /// let root_path: Path = vec![0].into();
     /// let op = NodeOperation::Insert {path: root_path.clone(),nodes };
     ///
-    /// let mut node_tree = NodeTree::new("root");
-    /// node_tree.apply_op(Rc::new(op)).unwrap();
+    /// let mut node_tree = NodeTree::default();
+    /// node_tree.apply_op(Arc::new(op)).unwrap();
     /// let node_id = node_tree.node_id_at_path(&root_path).unwrap();
     /// let node_path = node_tree.path_from_node_id(node_id);
     /// debug_assert_eq!(node_path, root_path);
     /// ```
     pub fn node_id_at_path<T: Into<Path>>(&self, path: T) -> Option<NodeId> {
         let path = path.into();
-        if path.is_empty() {
-            return Some(self.root);
+        if !path.is_valid() {
+            return None;
         }
 
         let mut iterate_node = self.root;
         for id in path.iter() {
             iterate_node = self.child_from_node_at_index(iterate_node, *id)?;
         }
+
+        if iterate_node.is_removed(&self.arena) {
+            return None;
+        }
         Some(iterate_node)
     }
 
@@ -105,7 +179,7 @@ impl NodeTree {
         counter
     }
 
-    /// Returns the note_id at the position of the tree with id note_id
+    /// Returns the note_id at the index of the tree which its id is note_id
     /// # Arguments
     ///
     /// * `node_id`: the node id of the child's parent
@@ -116,14 +190,14 @@ impl NodeTree {
     /// # Examples
     ///
     /// ```
-    /// use std::rc::Rc;
+    /// use std::sync::Arc;
     /// use lib_ot::core::{NodeOperation, NodeTree, NodeData, Path};
     /// let node_1 = NodeData::new("text".to_string());
     /// let inserted_path: Path = vec![0].into();
     ///
-    /// let mut node_tree = NodeTree::new("root");
+    /// let mut node_tree = NodeTree::default();
     /// let op = NodeOperation::Insert {path: inserted_path.clone(),nodes: vec![node_1.clone()] };
-    /// node_tree.apply_op(Rc::new(op)).unwrap();
+    /// node_tree.apply_op(Arc::new(op)).unwrap();
     ///
     /// let node_2 = node_tree.get_node_at_path(&inserted_path).unwrap();
     /// assert_eq!(node_2.node_type, node_1.node_type);
@@ -139,14 +213,6 @@ impl NodeTree {
         None
     }
 
-    /// Returns all children whose parent node id is node_id
-    ///
-    /// * `node_id`: the children's parent node id
-    ///
-    pub fn children_from_node(&self, node_id: NodeId) -> Children<'_, Node> {
-        node_id.children(&self.arena)
-    }
-
     ///
     /// # Arguments
     ///
@@ -173,36 +239,59 @@ impl NodeTree {
         Ok(())
     }
 
-    pub fn apply_op(&mut self, op: Rc<NodeOperation>) -> Result<(), OTError> {
-        let op = match Rc::try_unwrap(op) {
+    pub fn apply_op(&mut self, op: Arc<NodeOperation>) -> Result<(), OTError> {
+        let op = match Arc::try_unwrap(op) {
             Ok(op) => op,
             Err(op) => op.as_ref().clone(),
         };
 
         match op {
             NodeOperation::Insert { path, nodes } => self.insert_nodes(&path, nodes),
-            NodeOperation::UpdateAttributes { path, new, .. } => self.update_attributes(&path, new),
-            NodeOperation::UpdateBody { path, changeset } => self.update_body(&path, changeset),
-            NodeOperation::Delete { path, nodes } => self.delete_node(&path, nodes),
+            NodeOperation::Update { path, changeset } => self.update(&path, changeset),
+            NodeOperation::Delete { path, nodes: _ } => self.delete_node(&path),
         }
     }
     /// Inserts nodes at given path
+    /// root
+    ///     0 - A
+    ///         0 - A1
+    ///     1 - B
+    ///         0 - B1
+    ///         1 - B2
+    ///
+    /// The path of each node will be:
+    /// A:      [0]
+    /// A1:     [0,0]
+    /// B:      [1]
+    /// B1:     [1,0]
+    /// B2:     [1,1]
+    ///
+    /// When inserting multiple nodes into the same path, each of them will be appended to the root
+    /// node. For example. The path is [0] and the nodes are [A, B, C]. After inserting the nodes,
+    /// the tree will be:
+    /// root
+    ///     0: A
+    ///     1: B
+    ///     2: C
     ///
     /// returns error if the path is empty
     ///
     fn insert_nodes(&mut self, path: &Path, nodes: Vec<NodeData>) -> Result<(), OTError> {
-        debug_assert!(!path.is_empty());
-        if path.is_empty() {
-            return Err(OTErrorCode::PathIsEmpty.into());
+        if !path.is_valid() {
+            return Err(OTErrorCode::InvalidPath.into());
         }
 
         let (parent_path, last_path) = path.split_at(path.0.len() - 1);
         let last_index = *last_path.first().unwrap();
-        let parent_node = self
-            .node_id_at_path(parent_path)
-            .ok_or_else(|| ErrorBuilder::new(OTErrorCode::PathNotFound).build())?;
+        if parent_path.is_empty() {
+            self.insert_nodes_at_index(self.root, last_index, nodes)
+        } else {
+            let parent_node = self
+                .node_id_at_path(parent_path)
+                .ok_or_else(|| ErrorBuilder::new(OTErrorCode::PathNotFound).build())?;
 
-        self.insert_nodes_at_index(parent_node, last_index, nodes)
+            self.insert_nodes_at_index(parent_node, last_index, nodes)
+        }
     }
 
     /// Inserts nodes before the node with node_id
@@ -252,34 +341,24 @@ impl NodeTree {
         }
     }
 
-    fn update_attributes(&mut self, path: &Path, attributes: AttributeHashMap) -> Result<(), OTError> {
-        self.mut_node_at_path(path, |node| {
-            let new_attributes = AttributeHashMap::compose(&node.attributes, &attributes)?;
-            node.attributes = new_attributes;
-            Ok(())
-        })
-    }
-
-    fn delete_node(&mut self, path: &Path, nodes: Vec<NodeData>) -> Result<(), OTError> {
-        let mut update_node = self
-            .node_id_at_path(path)
-            .ok_or_else(|| ErrorBuilder::new(OTErrorCode::PathNotFound).build())?;
-
-        for _ in 0..nodes.len() {
-            let next = update_node.following_siblings(&self.arena).next();
-            update_node.remove_subtree(&mut self.arena);
-            if let Some(next_id) = next {
-                update_node = next_id;
-            } else {
-                break;
+    /// Removes a node and its descendants from the tree
+    fn delete_node(&mut self, path: &Path) -> Result<(), OTError> {
+        if !path.is_valid() {
+            return Err(OTErrorCode::InvalidPath.into());
+        }
+        match self.node_id_at_path(path) {
+            None => tracing::warn!("Can't find any node at path: {:?}", path),
+            Some(node) => {
+                node.remove_subtree(&mut self.arena);
             }
         }
+
         Ok(())
     }
 
-    fn update_body(&mut self, path: &Path, changeset: NodeBodyChangeset) -> Result<(), OTError> {
+    fn update(&mut self, path: &Path, changeset: Changeset) -> Result<(), OTError> {
         self.mut_node_at_path(path, |node| {
-            node.apply_body_changeset(changeset);
+            let _ = node.apply_changeset(changeset)?;
             Ok(())
         })
     }
@@ -288,6 +367,9 @@ impl NodeTree {
     where
         F: FnOnce(&mut Node) -> Result<(), OTError>,
     {
+        if !path.is_valid() {
+            return Err(OTErrorCode::InvalidPath.into());
+        }
         let node_id = self
             .node_id_at_path(path)
             .ok_or_else(|| ErrorBuilder::new(OTErrorCode::PathNotFound).build())?;

shared-lib/lib-ot/src/core/node_tree/tree_serde.rs

@@ -0,0 +1,63 @@
+use crate::core::{NodeData, NodeTree, NodeTreeContext};
+use serde::de::{MapAccess, Visitor};
+use serde::ser::SerializeSeq;
+use serde::{de, Deserialize, Deserializer, Serialize, Serializer};
+use std::fmt;
+
+use std::marker::PhantomData;
+
+impl Serialize for NodeTree {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        let root_node_id = self.root_node_id();
+        let mut children = self.get_children_ids(root_node_id);
+        if children.is_empty() {
+            return serializer.serialize_str("");
+        }
+        if children.len() == 1 {
+            let node_id = children.pop().unwrap();
+            match self.get_node_data(node_id) {
+                None => serializer.serialize_str(""),
+                Some(node_data) => node_data.serialize(serializer),
+            }
+        } else {
+            let mut seq = serializer.serialize_seq(Some(children.len()))?;
+            for child in children {
+                if let Some(child_node_data) = self.get_node_data(child) {
+                    let _ = seq.serialize_element(&child_node_data)?;
+                }
+            }
+            seq.end()
+        }
+    }
+}
+
+impl<'de> Deserialize<'de> for NodeTree {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        struct NodeTreeVisitor(PhantomData<NodeData>);
+
+        impl<'de> Visitor<'de> for NodeTreeVisitor {
+            type Value = NodeData;
+
+            fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
+                formatter.write_str("Expected node data tree")
+            }
+
+            fn visit_map<V>(self, map: V) -> Result<Self::Value, V::Error>
+            where
+                V: MapAccess<'de>,
+            {
+                // Forward the deserialization to NodeData
+                Deserialize::deserialize(de::value::MapAccessDeserializer::new(map))
+            }
+        }
+
+        let node_data: NodeData = deserializer.deserialize_any(NodeTreeVisitor(PhantomData))?;
+        Ok(NodeTree::from_node_data(node_data, NodeTreeContext::default()).unwrap())
+    }
+}

shared-lib/lib-ot/src/errors.rs

@@ -74,6 +74,7 @@ pub enum OTErrorCode {
     Internal,
     PathNotFound,
     PathIsEmpty,
+    InvalidPath,
     UnexpectedEmpty,
 }
 

shared-lib/lib-ot/tests/node/editor_test.rs

@@ -1,164 +0,0 @@
-use super::script::{NodeScript::*, *};
-use lib_ot::core::AttributeBuilder;
-use lib_ot::{
-    core::{NodeData, Path},
-    text_delta::TextOperationBuilder,
-};
-
-#[test]
-fn editor_deserialize_node_test() {
-    let mut test = NodeTest::new();
-    let node: NodeData = serde_json::from_str(EXAMPLE_JSON).unwrap();
-    let path: Path = 0.into();
-
-    let expected_delta = TextOperationBuilder::new()
-        .insert("👋 ")
-        .insert_with_attributes(
-            "Welcome to ",
-            AttributeBuilder::new().insert("href", "appflowy.io").build(),
-        )
-        .insert_with_attributes(
-            "AppFlowy Editor",
-            AttributeBuilder::new().insert("italic", true).build(),
-        )
-        .build();
-
-    test.run_scripts(vec![
-        InsertNode {
-            path,
-            node_data: node.clone(),
-            rev_id: 1,
-        },
-        AssertNumberOfNodesAtPath { path: None, len: 1 },
-        AssertNumberOfNodesAtPath {
-            path: Some(0.into()),
-            len: 14,
-        },
-        AssertNumberOfNodesAtPath {
-            path: Some(0.into()),
-            len: 14,
-        },
-        AssertNodeDelta {
-            path: vec![0, 1].into(),
-            expected: expected_delta,
-        },
-        AssertNodeData {
-            path: vec![0, 0].into(),
-            expected: Some(node.children[0].clone()),
-        },
-        AssertNodeData {
-            path: vec![0, 3].into(),
-            expected: Some(node.children[3].clone()),
-        },
-    ]);
-}
-
-#[allow(dead_code)]
-const EXAMPLE_JSON: &str = r#"
-{
-  "type": "editor",
-  "children": [
-    {
-      "type": "image",
-      "attributes": {
-        "image_src": "https://s1.ax1x.com/2022/08/26/v2sSbR.jpg",
-        "align": "center"
-      }
-    },
-    {
-      "type": "text",
-      "attributes": {
-        "subtype": "heading",
-        "heading": "h1"
-      },
-      "body": {
-        "delta": [
-          {
-            "insert": "👋 "
-          },
-          {
-            "insert": "Welcome to ",
-            "attributes": {
-              "href": "appflowy.io"
-            }
-          },
-          {
-            "insert": "AppFlowy Editor",
-            "attributes": {
-              "italic": true
-            }
-          }
-        ]
-      }
-    },
-    { "type": "text", "delta": [] },
-    {
-      "type": "text",
-      "body": {
-        "delta": [
-            { "insert": "AppFlowy Editor is a " },
-            { "insert": "highly customizable", "attributes": { "bold": true } },
-            { "insert": " " },
-            { "insert": "rich-text editor", "attributes": { "italic": true } },
-            { "insert": " for " },
-            { "insert": "Flutter", "attributes": { "underline": true } }
-        ]
-      }
-    },
-    {
-      "type": "text",
-      "attributes": { "checkbox": true, "subtype": "checkbox" },
-      "body": {
-        "delta": [{ "insert": "Customizable" }]
-      }
-    },
-    {
-      "type": "text",
-      "attributes": { "checkbox": true, "subtype": "checkbox" },
-      "delta": [{ "insert": "Test-covered" }]
-    },
-    {
-      "type": "text",
-      "attributes": { "checkbox": false, "subtype": "checkbox" },
-      "delta": [{ "insert": "more to come!" }]
-    },
-    { "type": "text", "delta": [] },
-    {
-      "type": "text",
-      "attributes": { "subtype": "quote" },
-      "delta": [{ "insert": "Here is an exmaple you can give it a try" }]
-    },
-    { "type": "text", "delta": [] },
-    {
-      "type": "text",
-      "delta": [
-        { "insert": "You can also use " },
-        {
-          "insert": "AppFlowy Editor",
-          "attributes": {
-            "italic": true,
-            "bold": true,
-            "backgroundColor": "0x6000BCF0"
-          }
-        },
-        { "insert": " as a component to build your own app." }
-      ]
-    },
-    { "type": "text", "delta": [] },
-    {
-      "type": "text",
-      "attributes": { "subtype": "bulleted-list" },
-      "delta": [{ "insert": "Use / to insert blocks" }]
-    },
-    {
-      "type": "text",
-      "attributes": { "subtype": "bulleted-list" },
-      "delta": [
-        {
-          "insert": "Select text to trigger to the toolbar to format your notes."
-        }
-      ]
-    }
-  ]
-}
-"#;

shared-lib/lib-ot/tests/node/mod.rs

@@ -1,4 +1,4 @@
-mod editor_test;
 mod operation_test;
 mod script;
+mod serde_test;
 mod tree_test;

shared-lib/lib-ot/tests/node/operation_test.rs

@@ -1,75 +1,7 @@
 use crate::node::script::NodeScript::*;
 use crate::node::script::NodeTest;
-use lib_ot::core::{AttributeBuilder, Node};
-use lib_ot::{
-    core::{NodeBodyChangeset, NodeData, NodeDataBuilder, NodeOperation, Path},
-    text_delta::TextOperationBuilder,
-};
 
-#[test]
-fn operation_insert_node_serde_test() {
-    let insert = NodeOperation::Insert {
-        path: Path(vec![0, 1]),
-        nodes: vec![NodeData::new("text".to_owned())],
-    };
-    let result = serde_json::to_string(&insert).unwrap();
-    assert_eq!(result, r#"{"op":"insert","path":[0,1],"nodes":[{"type":"text"}]}"#);
-}
-
-#[test]
-fn operation_insert_node_with_children_serde_test() {
-    let node = NodeDataBuilder::new("text")
-        .add_node(NodeData::new("sub_text".to_owned()))
-        .build();
-
-    let insert = NodeOperation::Insert {
-        path: Path(vec![0, 1]),
-        nodes: vec![node],
-    };
-    assert_eq!(
-        serde_json::to_string(&insert).unwrap(),
-        r#"{"op":"insert","path":[0,1],"nodes":[{"type":"text","children":[{"type":"sub_text"}]}]}"#
-    );
-}
-#[test]
-fn operation_update_node_attributes_serde_test() {
-    let operation = NodeOperation::UpdateAttributes {
-        path: Path(vec![0, 1]),
-        new: AttributeBuilder::new().insert("bold", true).build(),
-        old: AttributeBuilder::new().insert("bold", false).build(),
-    };
-
-    let result = serde_json::to_string(&operation).unwrap();
-    assert_eq!(
-        result,
-        r#"{"op":"update-attribute","path":[0,1],"new":{"bold":true},"old":{"bold":null}}"#
-    );
-}
-
-#[test]
-fn operation_update_node_body_serialize_test() {
-    let delta = TextOperationBuilder::new().insert("AppFlowy...").build();
-    let inverted = delta.invert_str("");
-    let changeset = NodeBodyChangeset::Delta { delta, inverted };
-    let insert = NodeOperation::UpdateBody {
-        path: Path(vec![0, 1]),
-        changeset,
-    };
-    let result = serde_json::to_string(&insert).unwrap();
-    assert_eq!(
-        result,
-        r#"{"op":"update-body","path":[0,1],"changeset":{"delta":{"delta":[{"insert":"AppFlowy..."}],"inverted":[{"delete":11}]}}}"#
-    );
-    //
-}
-
-#[test]
-fn operation_update_node_body_deserialize_test() {
-    let json_1 = r#"{"op":"update-body","path":[0,1],"changeset":{"delta":{"delta":[{"insert":"AppFlowy..."}],"inverted":[{"delete":11}]}}}"#;
-    let operation: NodeOperation = serde_json::from_str(json_1).unwrap();
-    let json_2 = serde_json::to_string(&operation).unwrap();
-    assert_eq!(json_1, json_2);
-}
+use lib_ot::core::{NodeDataBuilder, NodeOperation, Path};
 
 #[test]
 fn operation_insert_op_transform_test() {
@@ -94,12 +26,12 @@ fn operation_insert_op_transform_test() {
 }
 
 #[test]
-fn operation_insert_transform_one_level_path_test() {
+fn operation_insert_one_level_path_test() {
     let mut test = NodeTest::new();
     let node_data_1 = NodeDataBuilder::new("text_1").build();
     let node_data_2 = NodeDataBuilder::new("text_2").build();
     let node_data_3 = NodeDataBuilder::new("text_3").build();
-    let node_3: Node = node_data_3.clone().into();
+    let node_3 = node_data_3.clone();
     //  0: text_1
     //  1: text_2
     //
@@ -140,16 +72,16 @@ fn operation_insert_transform_one_level_path_test() {
 }
 
 #[test]
-fn operation_insert_transform_multiple_level_path_test() {
+fn operation_insert_with_multiple_level_path_test() {
     let mut test = NodeTest::new();
     let node_data_1 = NodeDataBuilder::new("text_1")
-        .add_node(NodeDataBuilder::new("text_1_1").build())
-        .add_node(NodeDataBuilder::new("text_1_2").build())
+        .add_node_data(NodeDataBuilder::new("text_1_1").build())
+        .add_node_data(NodeDataBuilder::new("text_1_2").build())
         .build();
 
     let node_data_2 = NodeDataBuilder::new("text_2")
-        .add_node(NodeDataBuilder::new("text_2_1").build())
-        .add_node(NodeDataBuilder::new("text_2_2").build())
+        .add_node_data(NodeDataBuilder::new("text_2_1").build())
+        .add_node_data(NodeDataBuilder::new("text_2_2").build())
         .build();
 
     let node_data_3 = NodeDataBuilder::new("text_3").build();
@@ -178,12 +110,12 @@ fn operation_insert_transform_multiple_level_path_test() {
 }
 
 #[test]
-fn operation_delete_transform_path_test() {
+fn operation_delete_test() {
     let mut test = NodeTest::new();
     let node_data_1 = NodeDataBuilder::new("text_1").build();
     let node_data_2 = NodeDataBuilder::new("text_2").build();
     let node_data_3 = NodeDataBuilder::new("text_3").build();
-    let node_3: Node = node_data_3.clone().into();
+    let node_3 = node_data_3.clone();
 
     let scripts = vec![
         InsertNode {
@@ -221,7 +153,10 @@ fn operation_delete_transform_path_test() {
         // After perform the delete action, the tree will be:
         // 0: text_1
         // 1: text_3
-        AssertNumberOfNodesAtPath { path: None, len: 2 },
+        AssertNumberOfChildrenAtPath {
+            path: None,
+            expected: 2,
+        },
         AssertNode {
             path: 1.into(),
             expected: Some(node_3),

shared-lib/lib-ot/tests/node/script.rs

@@ -1,7 +1,8 @@
-use lib_ot::core::{Node, Transaction};
+#![allow(clippy::all)]
+use lib_ot::core::{NodeTreeContext, Transaction};
 use lib_ot::{
     core::attributes::AttributeHashMap,
-    core::{NodeBody, NodeBodyChangeset, NodeData, NodeTree, Path, TransactionBuilder},
+    core::{Body, Changeset, NodeData, NodeTree, Path, TransactionBuilder},
     text_delta::TextOperations,
 };
 use std::collections::HashMap;
@@ -12,34 +13,47 @@ pub enum NodeScript {
         node_data: NodeData,
         rev_id: usize,
     },
+    InsertNodes {
+        path: Path,
+        node_data_list: Vec<NodeData>,
+        rev_id: usize,
+    },
     UpdateAttributes {
         path: Path,
         attributes: AttributeHashMap,
     },
     UpdateBody {
         path: Path,
-        changeset: NodeBodyChangeset,
+        changeset: Changeset,
     },
     DeleteNode {
         path: Path,
         rev_id: usize,
     },
-    AssertNumberOfNodesAtPath {
+    AssertNumberOfChildrenAtPath {
         path: Option<Path>,
-        len: usize,
+        expected: usize,
     },
-    AssertNodeData {
+    AssertNodesAtRoot {
+        expected: Vec<NodeData>,
+    },
+    #[allow(dead_code)]
+    AssertNodesAtPath {
         path: Path,
-        expected: Option<NodeData>,
+        expected: Vec<NodeData>,
     },
     AssertNode {
         path: Path,
-        expected: Option<Node>,
+        expected: Option<NodeData>,
     },
     AssertNodeDelta {
         path: Path,
         expected: TextOperations,
     },
+    #[allow(dead_code)]
+    AssertTreeJSON {
+        expected: String,
+    },
 }
 
 pub struct NodeTest {
@@ -53,7 +67,7 @@ impl NodeTest {
         Self {
             rev_id: 0,
             rev_operations: HashMap::new(),
-            node_tree: NodeTree::new("root"),
+            node_tree: NodeTree::new(NodeTreeContext::default()),
         }
     }
 
@@ -76,6 +90,17 @@ impl NodeTest {
                 self.transform_transaction_if_need(&mut transaction, rev_id);
                 self.apply_transaction(transaction);
             }
+            NodeScript::InsertNodes {
+                path,
+                node_data_list,
+                rev_id,
+            } => {
+                let mut transaction = TransactionBuilder::new(&self.node_tree)
+                    .insert_nodes_at_path(path, node_data_list)
+                    .finalize();
+                self.transform_transaction_if_need(&mut transaction, rev_id);
+                self.apply_transaction(transaction);
+            }
             NodeScript::UpdateAttributes { path, attributes } => {
                 let transaction = TransactionBuilder::new(&self.node_tree)
                     .update_attributes_at_path(&path, attributes)
@@ -96,48 +121,42 @@ impl NodeTest {
                 self.transform_transaction_if_need(&mut transaction, rev_id);
                 self.apply_transaction(transaction);
             }
+
             NodeScript::AssertNode { path, expected } => {
-                let node_id = self.node_tree.node_id_at_path(path);
-                if expected.is_none() && node_id.is_none() {
-                    return;
-                }
-
-                let node = self.node_tree.get_node(node_id.unwrap()).cloned();
-                assert_eq!(node, expected);
+                let node = self.node_tree.get_node_data_at_path(&path);
+                assert_eq!(node, expected.map(|e| e.into()));
             }
-            NodeScript::AssertNodeData { path, expected } => {
-                let node_id = self.node_tree.node_id_at_path(path);
-
-                match node_id {
-                    None => assert!(node_id.is_none()),
-                    Some(node_id) => {
-                        let node = self.node_tree.get_node(node_id).cloned();
-                        assert_eq!(node, expected.map(|e| e.into()));
-                    }
-                }
-            }
-            NodeScript::AssertNumberOfNodesAtPath {
-                path,
-                len: expected_len,
-            } => match path {
+            NodeScript::AssertNumberOfChildrenAtPath { path, expected } => match path {
                 None => {
                     let len = self.node_tree.number_of_children(None);
-                    assert_eq!(len, expected_len)
+                    assert_eq!(len, expected)
                 }
                 Some(path) => {
                     let node_id = self.node_tree.node_id_at_path(path).unwrap();
                     let len = self.node_tree.number_of_children(Some(node_id));
-                    assert_eq!(len, expected_len)
+                    assert_eq!(len, expected)
                 }
             },
+            NodeScript::AssertNodesAtRoot { expected } => {
+                let nodes = self.node_tree.get_node_data_at_root().unwrap().children;
+                assert_eq!(nodes, expected)
+            }
+            NodeScript::AssertNodesAtPath { path, expected } => {
+                let nodes = self.node_tree.get_node_data_at_path(&path).unwrap().children;
+                assert_eq!(nodes, expected)
+            }
             NodeScript::AssertNodeDelta { path, expected } => {
                 let node = self.node_tree.get_node_at_path(&path).unwrap();
-                if let NodeBody::Delta(delta) = node.body.clone() {
+                if let Body::Delta(delta) = node.body.clone() {
                     debug_assert_eq!(delta, expected);
                 } else {
                     panic!("Node body type not match, expect Delta");
                 }
             }
+            NodeScript::AssertTreeJSON { expected } => {
+                let json = serde_json::to_string(&self.node_tree).unwrap();
+                assert_eq!(json, expected)
+            }
         }
     }
 

shared-lib/lib-ot/tests/node/serde_test.rs

@@ -0,0 +1,147 @@
+use lib_ot::core::{
+    AttributeBuilder, Changeset, Extension, Interval, NodeData, NodeDataBuilder, NodeOperation, NodeTree, Path,
+    Transaction,
+};
+use lib_ot::text_delta::TextOperationBuilder;
+
+#[test]
+fn operation_insert_node_serde_test() {
+    let insert = NodeOperation::Insert {
+        path: Path(vec![0, 1]),
+        nodes: vec![NodeData::new("text".to_owned())],
+    };
+    let result = serde_json::to_string(&insert).unwrap();
+    assert_eq!(result, r#"{"op":"insert","path":[0,1],"nodes":[{"type":"text"}]}"#);
+}
+
+#[test]
+fn operation_insert_node_with_children_serde_test() {
+    let node = NodeDataBuilder::new("text")
+        .add_node_data(NodeData::new("sub_text".to_owned()))
+        .build();
+
+    let insert = NodeOperation::Insert {
+        path: Path(vec![0, 1]),
+        nodes: vec![node],
+    };
+    assert_eq!(
+        serde_json::to_string(&insert).unwrap(),
+        r#"{"op":"insert","path":[0,1],"nodes":[{"type":"text","children":[{"type":"sub_text"}]}]}"#
+    );
+}
+#[test]
+fn operation_update_node_attributes_serde_test() {
+    let operation = NodeOperation::Update {
+        path: Path(vec![0, 1]),
+        changeset: Changeset::Attributes {
+            new: AttributeBuilder::new().insert("bold", true).build(),
+            old: AttributeBuilder::new().insert("bold", false).build(),
+        },
+    };
+
+    let result = serde_json::to_string(&operation).unwrap();
+    assert_eq!(
+        result,
+        r#"{"op":"update","path":[0,1],"new":{"bold":true},"old":{"bold":null}}"#
+    );
+}
+
+#[test]
+fn operation_update_node_body_serialize_test() {
+    let delta = TextOperationBuilder::new().insert("AppFlowy...").build();
+    let inverted = delta.invert_str("");
+    let changeset = Changeset::Delta { delta, inverted };
+    let insert = NodeOperation::Update {
+        path: Path(vec![0, 1]),
+        changeset,
+    };
+    let result = serde_json::to_string(&insert).unwrap();
+    assert_eq!(
+        result,
+        r#"{"op":"update","path":[0,1],"delta":[{"insert":"AppFlowy..."}],"inverted":[{"delete":11}]}"#
+    );
+}
+
+#[test]
+fn operation_update_node_body_deserialize_test() {
+    let json_1 = r#"{"op":"update","path":[0,1],"delta":[{"insert":"AppFlowy..."}],"inverted":[{"delete":11}]}"#;
+    let operation: NodeOperation = serde_json::from_str(json_1).unwrap();
+    let json_2 = serde_json::to_string(&operation).unwrap();
+    assert_eq!(json_1, json_2);
+}
+
+#[test]
+fn transaction_serialize_test() {
+    let insert = NodeOperation::Insert {
+        path: Path(vec![0, 1]),
+        nodes: vec![NodeData::new("text".to_owned())],
+    };
+    let mut transaction = Transaction::from_operations(vec![insert]);
+    transaction.extension = Extension::TextSelection {
+        before_selection: Interval::new(0, 1),
+        after_selection: Interval::new(1, 2),
+    };
+    let json = serde_json::to_string(&transaction).unwrap();
+    assert_eq!(
+        json,
+        r#"{"operations":[{"op":"insert","path":[0,1],"nodes":[{"type":"text"}]}],"TextSelection":{"before_selection":{"start":0,"end":1},"after_selection":{"start":1,"end":2}}}"#
+    );
+}
+
+#[test]
+fn transaction_deserialize_test() {
+    let json = r#"{"operations":[{"op":"insert","path":[0,1],"nodes":[{"type":"text"}]}],"TextSelection":{"before_selection":{"start":0,"end":1},"after_selection":{"start":1,"end":2}}}"#;
+    let transaction: Transaction = serde_json::from_str(json).unwrap();
+    assert_eq!(transaction.operations.len(), 1);
+}
+
+#[test]
+fn node_tree_deserialize_test() {
+    let tree: NodeTree = serde_json::from_str(TREE_JSON).unwrap();
+    assert_eq!(tree.number_of_children(None), 1);
+}
+
+#[test]
+fn node_tree_serialize_test() {
+    let tree: NodeTree = serde_json::from_str(TREE_JSON).unwrap();
+    let json = serde_json::to_string_pretty(&tree).unwrap();
+    assert_eq!(json, TREE_JSON);
+}
+
+#[allow(dead_code)]
+const TREE_JSON: &str = r#"{
+  "type": "editor",
+  "children": [
+    {
+      "type": "image",
+      "attributes": {
+        "image_src": "https://s1.ax1x.com/2022/08/26/v2sSbR.jpg"
+      }
+    },
+    {
+      "type": "text",
+      "attributes": {
+        "heading": "h1"
+      },
+      "body": {
+        "delta": [
+          {
+            "insert": "👋 "
+          },
+          {
+            "insert": "Welcome to ",
+            "attributes": {
+              "href": "appflowy.io"
+            }
+          },
+          {
+            "insert": "AppFlowy Editor",
+            "attributes": {
+              "italic": true
+            }
+          }
+        ]
+      }
+    }
+  ]
+}"#;

shared-lib/lib-ot/tests/node/tree_test.rs

@@ -1,25 +1,169 @@
 use crate::node::script::NodeScript::*;
 use crate::node::script::NodeTest;
-use lib_ot::core::NodeBody;
-use lib_ot::core::NodeBodyChangeset;
+use lib_ot::core::Body;
+use lib_ot::core::Changeset;
 use lib_ot::core::OperationTransform;
 use lib_ot::core::{NodeData, NodeDataBuilder, Path};
-use lib_ot::text_delta::TextOperationBuilder;
+use lib_ot::text_delta::{TextOperationBuilder, TextOperations};
 
 #[test]
 fn node_insert_test() {
     let mut test = NodeTest::new();
-    let inserted_node = NodeData::new("text");
-    let path: Path = 0.into();
+    let node_data = NodeData::new("text");
+    let path: Path = vec![0].into();
     let scripts = vec![
         InsertNode {
             path: path.clone(),
-            node_data: inserted_node.clone(),
+            node_data: node_data.clone(),
             rev_id: 1,
         },
-        AssertNodeData {
+        AssertNode {
             path,
-            expected: Some(inserted_node),
+            expected: Some(node_data),
+        },
+    ];
+    test.run_scripts(scripts);
+}
+
+#[test]
+#[should_panic]
+fn node_insert_with_empty_path_test() {
+    let mut test = NodeTest::new();
+    let scripts = vec![InsertNode {
+        path: vec![].into(),
+        node_data: NodeData::new("text"),
+        rev_id: 1,
+    }];
+    test.run_scripts(scripts);
+}
+
+#[test]
+#[should_panic]
+fn node_insert_with_not_exist_path_test() {
+    let mut test = NodeTest::new();
+    let node_data = NodeData::new("text");
+    let path: Path = vec![0, 0, 9].into();
+    let scripts = vec![
+        InsertNode {
+            path: path.clone(),
+            node_data: node_data.clone(),
+            rev_id: 1,
+        },
+        AssertNode {
+            path,
+            expected: Some(node_data),
+        },
+    ];
+    test.run_scripts(scripts);
+}
+
+#[test]
+// Append the node to the end of the list if the insert path is out of bounds.
+fn node_insert_out_of_bound_test() {
+    let mut test = NodeTest::new();
+    let image_a = NodeData::new("image_a");
+    let image_b = NodeData::new("image_b");
+    let image = NodeDataBuilder::new("image_1")
+        .add_node_data(image_a.clone())
+        .add_node_data(image_b.clone())
+        .build();
+    let text_node = NodeDataBuilder::new("text_1").add_node_data(image.clone()).build();
+    let image_c = NodeData::new("image_c");
+
+    let scripts = vec![
+        InsertNode {
+            path: 0.into(),
+            node_data: text_node,
+            rev_id: 1,
+        },
+        // 0:text_1
+        //      0:image_1
+        //             0:image_a
+        //             1:image_b
+        InsertNode {
+            path: vec![0, 0, 10].into(),
+            node_data: image_c.clone(),
+            rev_id: 2,
+        },
+        // 0:text_1
+        //      0:image_1
+        //             0:image_a
+        //             1:image_b
+        //             2:image_b
+        AssertNode {
+            path: vec![0, 0, 2].into(),
+            expected: Some(image_c),
+        },
+        AssertNode {
+            path: vec![0, 0, 10].into(),
+            expected: None,
+        },
+    ];
+    test.run_scripts(scripts);
+}
+
+#[test]
+fn tree_insert_multiple_nodes_at_root_path_test() {
+    let mut test = NodeTest::new();
+    let node_1 = NodeData::new("a");
+    let node_2 = NodeData::new("b");
+    let node_3 = NodeData::new("c");
+    let node_data_list = vec![node_1, node_2, node_3];
+    let path: Path = vec![0].into();
+
+    // Insert three nodes under the root
+    let scripts = vec![
+        // 0:a
+        // 1:b
+        // 2:c
+        InsertNodes {
+            path,
+            node_data_list: node_data_list.clone(),
+            rev_id: 1,
+        },
+        AssertNodesAtRoot {
+            expected: node_data_list,
+        },
+    ];
+    test.run_scripts(scripts);
+}
+
+#[test]
+fn tree_insert_multiple_nodes_at_root_path_test2() {
+    let mut test = NodeTest::new();
+    let node_1 = NodeData::new("a");
+    let node_2 = NodeData::new("b");
+    let node_3 = NodeData::new("c");
+    let scripts = vec![
+        InsertNode {
+            path: 0.into(),
+            node_data: node_1.clone(),
+            rev_id: 1,
+        },
+        InsertNode {
+            path: 1.into(),
+            node_data: node_2.clone(),
+            rev_id: 2,
+        },
+        InsertNode {
+            path: 2.into(),
+            node_data: node_3.clone(),
+            rev_id: 3,
+        },
+        // 0:a
+        // 1:b
+        // 2:c
+        AssertNode {
+            path: 0.into(),
+            expected: Some(node_1),
+        },
+        AssertNode {
+            path: 1.into(),
+            expected: Some(node_2),
+        },
+        AssertNode {
+            path: 2.into(),
+            expected: Some(node_3),
         },
     ];
     test.run_scripts(scripts);
@@ -28,61 +172,40 @@ fn node_insert_test() {
 #[test]
 fn node_insert_node_with_children_test() {
     let mut test = NodeTest::new();
-    let inserted_node = NodeDataBuilder::new("text").add_node(NodeData::new("image")).build();
+    let image_1 = NodeData::new("image_a");
+    let image_2 = NodeData::new("image_b");
+
+    let image = NodeDataBuilder::new("image")
+        .add_node_data(image_1.clone())
+        .add_node_data(image_2.clone())
+        .build();
+    let node_data = NodeDataBuilder::new("text").add_node_data(image.clone()).build();
     let path: Path = 0.into();
     let scripts = vec![
         InsertNode {
             path: path.clone(),
-            node_data: inserted_node.clone(),
+            node_data: node_data.clone(),
             rev_id: 1,
         },
-        AssertNodeData {
+        // 0:text
+        //      0:image
+        //             0:image_1
+        //             1:image_2
+        AssertNode {
             path,
-            expected: Some(inserted_node),
+            expected: Some(node_data),
         },
-    ];
-    test.run_scripts(scripts);
-}
-
-#[test]
-fn node_insert_multi_nodes_test() {
-    let mut test = NodeTest::new();
-    let path_1: Path = 0.into();
-    let node_1 = NodeData::new("text_1");
-
-    let path_2: Path = 1.into();
-    let node_2 = NodeData::new("text_2");
-
-    let path_3: Path = 2.into();
-    let node_3 = NodeData::new("text_3");
-
-    let scripts = vec![
-        InsertNode {
-            path: path_1.clone(),
-            node_data: node_1.clone(),
-            rev_id: 1,
+        AssertNode {
+            path: vec![0, 0].into(),
+            expected: Some(image),
         },
-        InsertNode {
-            path: path_2.clone(),
-            node_data: node_2.clone(),
-            rev_id: 2,
+        AssertNode {
+            path: vec![0, 0, 0].into(),
+            expected: Some(image_1),
         },
-        InsertNode {
-            path: path_3.clone(),
-            node_data: node_3.clone(),
-            rev_id: 3,
-        },
-        AssertNodeData {
-            path: path_1,
-            expected: Some(node_1),
-        },
-        AssertNodeData {
-            path: path_2,
-            expected: Some(node_2),
-        },
-        AssertNodeData {
-            path: path_3,
-            expected: Some(node_3),
+        AssertNode {
+            path: vec![0, 0, 1].into(),
+            expected: Some(image_2),
         },
     ];
     test.run_scripts(scripts);
@@ -129,19 +252,22 @@ fn node_insert_node_in_ordered_nodes_test() {
         // 1:text_2_2
         // 2:text_2_1
         // 3:text_3
-        AssertNodeData {
+        AssertNode {
             path: path_1,
             expected: Some(node_1),
         },
-        AssertNodeData {
+        AssertNode {
             path: path_2,
             expected: Some(node_2_2),
         },
-        AssertNodeData {
+        AssertNode {
             path: path_3,
             expected: Some(node_2_1),
         },
-        AssertNumberOfNodesAtPath { path: None, len: 4 },
+        AssertNumberOfChildrenAtPath {
+            path: None,
+            expected: 4,
+        },
     ];
     test.run_scripts(scripts);
 }
@@ -152,15 +278,15 @@ fn node_insert_nested_nodes_test() {
     let node_data_1_1 = NodeDataBuilder::new("text_1_1").build();
     let node_data_1_2 = NodeDataBuilder::new("text_1_2").build();
     let node_data_1 = NodeDataBuilder::new("text_1")
-        .add_node(node_data_1_1.clone())
-        .add_node(node_data_1_2.clone())
+        .add_node_data(node_data_1_1.clone())
+        .add_node_data(node_data_1_2.clone())
         .build();
 
     let node_data_2_1 = NodeDataBuilder::new("text_2_1").build();
     let node_data_2_2 = NodeDataBuilder::new("text_2_2").build();
     let node_data_2 = NodeDataBuilder::new("text_2")
-        .add_node(node_data_2_1.clone())
-        .add_node(node_data_2_2.clone())
+        .add_node_data(node_data_2_1.clone())
+        .add_node_data(node_data_2_2.clone())
         .build();
 
     let scripts = vec![
@@ -207,8 +333,8 @@ fn node_insert_node_before_existing_nested_nodes_test() {
     let node_data_1_1 = NodeDataBuilder::new("text_1_1").build();
     let node_data_1_2 = NodeDataBuilder::new("text_1_2").build();
     let node_data_1 = NodeDataBuilder::new("text_1")
-        .add_node(node_data_1_1.clone())
-        .add_node(node_data_1_2.clone())
+        .add_node_data(node_data_1_1.clone())
+        .add_node_data(node_data_1_2.clone())
         .build();
 
     let scripts = vec![
@@ -258,7 +384,7 @@ fn node_insert_with_attributes_test() {
             path: path.clone(),
             attributes: inserted_node.attributes.clone(),
         },
-        AssertNodeData {
+        AssertNode {
             path,
             expected: Some(inserted_node),
         },
@@ -270,7 +396,6 @@ fn node_insert_with_attributes_test() {
 fn node_delete_test() {
     let mut test = NodeTest::new();
     let inserted_node = NodeData::new("text");
-
     let path: Path = 0.into();
     let scripts = vec![
         InsertNode {
@@ -282,7 +407,314 @@ fn node_delete_test() {
             path: path.clone(),
             rev_id: 2,
         },
-        AssertNodeData { path, expected: None },
+        AssertNode { path, expected: None },
+    ];
+    test.run_scripts(scripts);
+}
+
+#[test]
+fn node_delete_node_from_list_test() {
+    let mut test = NodeTest::new();
+    let image_a = NodeData::new("image_a");
+    let image_b = NodeData::new("image_b");
+
+    let image_1 = NodeDataBuilder::new("image_1")
+        .add_node_data(image_a.clone())
+        .add_node_data(image_b.clone())
+        .build();
+    let text_node_1 = NodeDataBuilder::new("text_1").add_node_data(image_1.clone()).build();
+    let image_2 = NodeDataBuilder::new("image_2")
+        .add_node_data(image_a.clone())
+        .add_node_data(image_b.clone())
+        .build();
+    let text_node_2 = NodeDataBuilder::new("text_2").add_node_data(image_2.clone()).build();
+
+    let scripts = vec![
+        InsertNode {
+            path: 0.into(),
+            node_data: text_node_1,
+            rev_id: 1,
+        },
+        InsertNode {
+            path: 1.into(),
+            node_data: text_node_2.clone(),
+            rev_id: 1,
+        },
+        DeleteNode {
+            path: 0.into(),
+            rev_id: 2,
+        },
+        AssertNode {
+            path: 1.into(),
+            expected: None,
+        },
+        AssertNode {
+            path: 0.into(),
+            expected: Some(text_node_2),
+        },
+        AssertNode {
+            path: vec![0, 0].into(),
+            expected: Some(image_2),
+        },
+    ];
+    test.run_scripts(scripts);
+}
+
+#[test]
+fn node_delete_nested_node_test() {
+    let mut test = NodeTest::new();
+    let image_a = NodeData::new("image_a");
+    let image_b = NodeData::new("image_b");
+
+    let image_1 = NodeDataBuilder::new("image_1")
+        .add_node_data(image_a.clone())
+        .add_node_data(image_b.clone())
+        .build();
+    let text_node_1 = NodeDataBuilder::new("text_1").add_node_data(image_1.clone()).build();
+
+    let image_2 = NodeDataBuilder::new("image_2")
+        .add_node_data(image_a.clone())
+        .add_node_data(image_b.clone())
+        .build();
+    let text_node_2 = NodeDataBuilder::new("text_2").add_node_data(image_2.clone()).build();
+
+    let scripts = vec![
+        InsertNode {
+            path: 0.into(),
+            node_data: text_node_1,
+            rev_id: 1,
+        },
+        InsertNode {
+            path: 1.into(),
+            node_data: text_node_2.clone(),
+            rev_id: 1,
+        },
+        // 0:text_1
+        //      0:image_1
+        //             0:image_a
+        //             1:image_b
+        // 1:text_2
+        //      0:image_2
+        //             0:image_a
+        //             1:image_b
+        DeleteNode {
+            path: vec![0, 0, 0].into(),
+            rev_id: 2,
+        },
+        // 0:text_1
+        //      0:image_1
+        //             0:image_b
+        // 1:text_2
+        //      0:image_2
+        //             0:image_a
+        //             1:image_b
+        AssertNode {
+            path: vec![0, 0, 0].into(),
+            expected: Some(image_b.clone()),
+        },
+        DeleteNode {
+            path: vec![0, 0].into(),
+            rev_id: 3,
+        },
+        // 0:text_1
+        // 1:text_2
+        //      0:image_2
+        //             0:image_a
+        //             1:image_b
+        AssertNumberOfChildrenAtPath {
+            path: Some(0.into()),
+            expected: 0,
+        },
+        AssertNode {
+            path: vec![0].into(),
+            expected: Some(NodeDataBuilder::new("text_1").build()),
+        },
+        AssertNode {
+            path: vec![1, 0, 0].into(),
+            expected: Some(image_a.clone()),
+        },
+        AssertNode {
+            path: vec![1, 0, 1].into(),
+            expected: Some(image_b.clone()),
+        },
+    ];
+    test.run_scripts(scripts);
+}
+
+#[test]
+fn node_delete_children_test() {
+    let mut test = NodeTest::new();
+    let inserted_node = NodeDataBuilder::new("text")
+        .add_node_data(NodeDataBuilder::new("sub_text_1").build())
+        .add_node_data(NodeDataBuilder::new("sub_text_2").build())
+        .add_node_data(NodeDataBuilder::new("sub_text_3").build())
+        .build();
+
+    let scripts = vec![
+        InsertNode {
+            path: vec![0].into(),
+            node_data: inserted_node,
+            rev_id: 1,
+        },
+        AssertNode {
+            path: vec![0, 0].into(),
+            expected: Some(NodeDataBuilder::new("sub_text_1").build()),
+        },
+        AssertNode {
+            path: vec![0, 1].into(),
+            expected: Some(NodeDataBuilder::new("sub_text_2").build()),
+        },
+        AssertNode {
+            path: vec![0, 2].into(),
+            expected: Some(NodeDataBuilder::new("sub_text_3").build()),
+        },
+        AssertNumberOfChildrenAtPath {
+            path: Some(Path(vec![0])),
+            expected: 3,
+        },
+        DeleteNode {
+            path: vec![0, 0].into(),
+            rev_id: 2,
+        },
+        AssertNode {
+            path: vec![0, 0].into(),
+            expected: Some(NodeDataBuilder::new("sub_text_2").build()),
+        },
+        AssertNumberOfChildrenAtPath {
+            path: Some(Path(vec![0])),
+            expected: 2,
+        },
+    ];
+    test.run_scripts(scripts);
+}
+
+#[test]
+fn node_reorder_sub_nodes_test() {
+    let mut test = NodeTest::new();
+    let image_a = NodeData::new("image_a");
+    let image_b = NodeData::new("image_b");
+
+    let child_1 = NodeDataBuilder::new("image_1")
+        .add_node_data(image_a.clone())
+        .add_node_data(image_b.clone())
+        .build();
+    let text_node_1 = NodeDataBuilder::new("text_1").add_node_data(child_1.clone()).build();
+    let scripts = vec![
+        InsertNode {
+            path: 0.into(),
+            node_data: text_node_1,
+            rev_id: 1,
+        },
+        // 0:text_1
+        //      0:image_1
+        //             0:image_a
+        //             1:image_b
+        DeleteNode {
+            path: vec![0, 0, 0].into(),
+            rev_id: 2,
+        },
+        // 0:text_1
+        //      0:image_1
+        //             0:image_b
+        InsertNode {
+            path: vec![0, 0, 1].into(),
+            node_data: image_a.clone(),
+            rev_id: 3,
+        },
+        // 0:text_1
+        //      0:image_1
+        //             0:image_b
+        //             1:image_a
+        AssertNode {
+            path: vec![0, 0, 0].into(),
+            expected: Some(image_b.clone()),
+        },
+        AssertNode {
+            path: vec![0, 0, 1].into(),
+            expected: Some(image_a.clone()),
+        },
+    ];
+    test.run_scripts(scripts);
+}
+
+#[test]
+fn node_reorder_nodes_test() {
+    let mut test = NodeTest::new();
+    let image_a = NodeData::new("image_a");
+    let image_b = NodeData::new("image_b");
+
+    let image_1 = NodeDataBuilder::new("image_1")
+        .add_node_data(image_a.clone())
+        .add_node_data(image_b.clone())
+        .build();
+    let text_node_1 = NodeDataBuilder::new("text_1").add_node_data(image_1.clone()).build();
+
+    let image_2 = NodeDataBuilder::new("image_2")
+        .add_node_data(image_a.clone())
+        .add_node_data(image_b.clone())
+        .build();
+    let text_node_2 = NodeDataBuilder::new("text_2").add_node_data(image_2.clone()).build();
+
+    let scripts = vec![
+        InsertNode {
+            path: 0.into(),
+            node_data: text_node_1.clone(),
+            rev_id: 1,
+        },
+        InsertNode {
+            path: 0.into(),
+            node_data: text_node_2.clone(),
+            rev_id: 1,
+        },
+        // 0:text_1
+        //      0:image_1
+        //             0:image_a
+        //             1:image_b
+        // 1:text_2
+        //      0:image_2
+        //             0:image_a
+        //             1:image_b
+        DeleteNode {
+            path: vec![0].into(),
+            rev_id: 2,
+        },
+        InsertNode {
+            path: vec![1].into(),
+            node_data: text_node_1.clone(),
+            rev_id: 3,
+        },
+        // 0:text_2
+        //      0:image_2
+        //             0:image_a
+        //             1:image_b
+        // 1:text_1
+        //      0:image_1
+        //             0:image_a
+        //             1:image_b
+        AssertNode {
+            path: vec![0].into(),
+            expected: Some(text_node_2.clone()),
+        },
+        AssertNode {
+            path: vec![0, 0].into(),
+            expected: Some(image_2.clone()),
+        },
+        AssertNode {
+            path: vec![0, 0, 0].into(),
+            expected: Some(image_a.clone()),
+        },
+        AssertNode {
+            path: vec![1].into(),
+            expected: Some(text_node_1.clone()),
+        },
+        AssertNode {
+            path: vec![1, 0].into(),
+            expected: Some(image_1.clone()),
+        },
+        AssertNode {
+            path: vec![1, 0, 1].into(),
+            expected: Some(image_b.clone()),
+        },
     ];
     test.run_scripts(scripts);
 }
@@ -290,29 +722,79 @@ fn node_delete_test() {
 #[test]
 fn node_update_body_test() {
     let mut test = NodeTest::new();
-    let path: Path = 0.into();
-
-    let s = "Hello".to_owned();
-    let init_delta = TextOperationBuilder::new().insert(&s).build();
-    let delta = TextOperationBuilder::new().retain(s.len()).insert(" AppFlowy").build();
-    let inverted = delta.invert(&init_delta);
-    let expected = init_delta.compose(&delta).unwrap();
-
+    let (initial_delta, changeset, _, expected) = make_node_delta_changeset("Hello", "AppFlowy");
     let node = NodeDataBuilder::new("text")
-        .insert_body(NodeBody::Delta(init_delta))
+        .insert_body(Body::Delta(initial_delta))
         .build();
 
     let scripts = vec![
         InsertNode {
-            path: path.clone(),
+            path: 0.into(),
             node_data: node,
             rev_id: 1,
         },
         UpdateBody {
-            path: path.clone(),
-            changeset: NodeBodyChangeset::Delta { delta, inverted },
+            path: 0.into(),
+            changeset,
+        },
+        AssertNodeDelta {
+            path: 0.into(),
+            expected,
         },
-        AssertNodeDelta { path, expected },
     ];
     test.run_scripts(scripts);
 }
+
+#[test]
+fn node_inverted_body_changeset_test() {
+    let mut test = NodeTest::new();
+    let (initial_delta, changeset, inverted_changeset, _expected) = make_node_delta_changeset("Hello", "AppFlowy");
+    let node = NodeDataBuilder::new("text")
+        .insert_body(Body::Delta(initial_delta.clone()))
+        .build();
+
+    let scripts = vec![
+        InsertNode {
+            path: 0.into(),
+            node_data: node,
+            rev_id: 1,
+        },
+        UpdateBody {
+            path: 0.into(),
+            changeset,
+        },
+        UpdateBody {
+            path: 0.into(),
+            changeset: inverted_changeset,
+        },
+        AssertNodeDelta {
+            path: 0.into(),
+            expected: initial_delta,
+        },
+    ];
+    test.run_scripts(scripts);
+}
+
+fn make_node_delta_changeset(
+    initial_content: &str,
+    insert_str: &str,
+) -> (TextOperations, Changeset, Changeset, TextOperations) {
+    let initial_content = initial_content.to_owned();
+    let initial_delta = TextOperationBuilder::new().insert(&initial_content).build();
+    let delta = TextOperationBuilder::new()
+        .retain(initial_content.len())
+        .insert(insert_str)
+        .build();
+    let inverted = delta.invert(&initial_delta);
+    let expected = initial_delta.compose(&delta).unwrap();
+
+    let changeset = Changeset::Delta {
+        delta: delta.clone(),
+        inverted: inverted.clone(),
+    };
+    let inverted_changeset = Changeset::Delta {
+        delta: inverted,
+        inverted: delta,
+    };
+    (initial_delta, changeset, inverted_changeset, expected)
+}