test sync

backend/src/services/doc/crud.rs

@@ -9,7 +9,7 @@ use sqlx::{postgres::PgArguments, PgPool, Postgres};
 use uuid::Uuid;
 
 #[tracing::instrument(level = "debug", skip(transaction), err)]
-pub(crate) async fn create_doc(
+pub(crate) async fn create_doc_with_transaction(
     transaction: &mut DBTransaction<'_>,
     params: CreateDocParams,
 ) -> Result<(), ServerError> {
@@ -23,6 +23,22 @@ pub(crate) async fn create_doc(
     Ok(())
 }
 
+pub(crate) async fn create_doc(pool: &PgPool, params: CreateDocParams) -> Result<(), ServerError> {
+    let mut transaction = pool
+        .begin()
+        .await
+        .context("Failed to acquire a Postgres connection to create doc")?;
+
+    let _ = create_doc_with_transaction(&mut transaction, params).await?;
+
+    transaction
+        .commit()
+        .await
+        .context("Failed to commit SQL transaction to create doc.")?;
+
+    Ok(())
+}
+
 #[tracing::instrument(level = "debug", skip(pool), err)]
 pub(crate) async fn read_doc(pool: &PgPool, params: DocIdentifier) -> Result<Doc, ServerError> {
     let doc_id = Uuid::parse_str(&params.doc_id)?;

backend/src/services/doc/manager.rs

@@ -8,14 +8,16 @@ use crate::{
 };
 use actix_web::web::Data;
 
+use crate::services::doc::create_doc;
+use backend_service::errors::ServerError;
 use flowy_collaboration::{
     core::sync::{ServerDocManager, ServerDocPersistence},
     entities::doc::Doc,
     errors::CollaborateError,
-    protobuf::{DocIdentifier, UpdateDocParams},
+    protobuf::{CreateDocParams, DocIdentifier, UpdateDocParams},
 };
 use lib_infra::future::FutureResultSend;
-use lib_ot::rich_text::RichTextDelta;
+use lib_ot::{revision::Revision, rich_text::RichTextDelta};
 use sqlx::PgPool;
 use std::{convert::TryInto, sync::Arc};
 use tokio::sync::{mpsc, oneshot};
@@ -77,7 +79,7 @@ impl ServerDocPersistence for DocPersistenceImpl {
         FutureResultSend::new(async move {
             let _ = update_doc(pg_pool.get_ref(), params)
                 .await
-                .map_err(|e| CollaborateError::internal().context(e))?;
+                .map_err(server_error_to_collaborate_error)?;
             Ok(())
         })
     }
@@ -91,11 +93,40 @@ impl ServerDocPersistence for DocPersistenceImpl {
         FutureResultSend::new(async move {
             let mut pb_doc = read_doc(pg_pool.get_ref(), params)
                 .await
-                .map_err(|e| CollaborateError::internal().context(e))?;
+                .map_err(server_error_to_collaborate_error)?;
             let doc = (&mut pb_doc)
                 .try_into()
                 .map_err(|e| CollaborateError::internal().context(e))?;
             Ok(doc)
         })
     }
+
+    fn create_doc(&self, revision: Revision) -> FutureResultSend<Doc, CollaborateError> {
+        let pg_pool = self.0.clone();
+        FutureResultSend::new(async move {
+            let delta = RichTextDelta::from_bytes(&revision.delta_data)?;
+            let doc_json = delta.to_json();
+
+            let params = CreateDocParams {
+                id: revision.doc_id.clone(),
+                data: doc_json.clone(),
+                unknown_fields: Default::default(),
+                cached_size: Default::default(),
+            };
+
+            let _ = create_doc(pg_pool.get_ref(), params)
+                .await
+                .map_err(server_error_to_collaborate_error)?;
+            let doc: Doc = revision.try_into()?;
+            Ok(doc)
+        })
+    }
+}
+
+fn server_error_to_collaborate_error(error: ServerError) -> CollaborateError {
+    if error.is_record_not_found() {
+        CollaborateError::record_not_found()
+    } else {
+        CollaborateError::internal().context(error)
+    }
 }

backend/src/services/doc/router.rs

@@ -6,26 +6,14 @@ use actix_web::{
     web::{Data, Payload},
     HttpResponse,
 };
-use anyhow::Context;
+
 use backend_service::{errors::ServerError, response::FlowyResponse};
 use flowy_collaboration::protobuf::{CreateDocParams, DocIdentifier, UpdateDocParams};
 use sqlx::PgPool;
 
 pub async fn create_handler(payload: Payload, pool: Data<PgPool>) -> Result<HttpResponse, ServerError> {
     let params: CreateDocParams = parse_from_payload(payload).await?;
-
+    let _ = create_doc(&pool, params).await?;
-    let mut transaction = pool
-        .begin()
-        .await
-        .context("Failed to acquire a Postgres connection to create doc")?;
-
-    let _ = create_doc(&mut transaction, params).await?;
-
-    transaction
-        .commit()
-        .await
-        .context("Failed to commit SQL transaction to create doc.")?;
-
     Ok(FlowyResponse::success().into())
 }
 

backend/src/services/doc/ws_actor.rs

@@ -10,8 +10,8 @@ use actix_web::web::Data;
 use async_stream::stream;
 use backend_service::errors::{internal_error, Result as DocResult, ServerError};
 use flowy_collaboration::{
-    core::sync::{OpenDocHandle, ServerDocManager},
+    core::sync::ServerDocManager,
-    protobuf::{NewDocUser, WsDataType, WsDocumentData},
+    protobuf::{WsDataType, WsDocumentData},
 };
 use futures::stream::StreamExt;
 use lib_ot::protobuf::Revision;
@@ -80,32 +80,11 @@ impl DocWsActor {
         match document_data.ty {
             WsDataType::Acked => Ok(()),
             WsDataType::PushRev => self.apply_pushed_rev(user, socket, data, pool).await,
-            WsDataType::NewDocUser => self.add_doc_user(user, socket, data, pool).await,
             WsDataType::PullRev => Ok(()),
             WsDataType::Conflict => Ok(()),
         }
     }
 
-    async fn add_doc_user(
-        &self,
-        user: Arc<WsUser>,
-        socket: Socket,
-        data: Vec<u8>,
-        pg_pool: Data<PgPool>,
-    ) -> DocResult<()> {
-        let doc_user = spawn_blocking(move || {
-            let user: NewDocUser = parse_from_bytes(&data)?;
-            DocResult::Ok(user)
-        })
-        .await
-        .map_err(internal_error)??;
-        if let Some(handle) = self.get_doc_handle(&doc_user.doc_id, pg_pool.clone()).await {
-            let user = Arc::new(ServerDocUser { user, socket, pg_pool });
-            handle.add_user(user, doc_user.rev_id).await.map_err(internal_error)?;
-        }
-        Ok(())
-    }
-
     async fn apply_pushed_rev(
         &self,
         user: Arc<WsUser>,
@@ -113,30 +92,27 @@ impl DocWsActor {
         data: Vec<u8>,
         pg_pool: Data<PgPool>,
     ) -> DocResult<()> {
-        let mut revision = spawn_blocking(move || {
+        let mut revision_pb = spawn_blocking(move || {
             let revision: Revision = parse_from_bytes(&data)?;
             let _ = verify_md5(&revision)?;
             DocResult::Ok(revision)
         })
         .await
         .map_err(internal_error)??;
-        if let Some(handle) = self.get_doc_handle(&revision.doc_id, pg_pool.clone()).await {
+        let revision: lib_ot::revision::Revision = (&mut revision_pb).try_into().map_err(internal_error)?;
-            let user = Arc::new(ServerDocUser { user, socket, pg_pool });
+        // Create the doc if it doesn't exist
-            let revision = (&mut revision).try_into().map_err(internal_error).unwrap();
+        let handler = match self.doc_manager.get(&revision.doc_id).await {
-            handle.apply_revision(user, revision).await.map_err(internal_error)?;
+            None => self
-        }
+                .doc_manager
-        Ok(())
+                .create_doc(revision.clone())
-    }
+                .await
+                .map_err(internal_error)?,
+            Some(handler) => handler,
+        };
 
-    async fn get_doc_handle(&self, doc_id: &str, _pg_pool: Data<PgPool>) -> Option<Arc<OpenDocHandle>> {
+        let user = Arc::new(ServerDocUser { user, socket, pg_pool });
-        match self.doc_manager.get(doc_id).await {
+        handler.apply_revision(user, revision).await.map_err(internal_error)?;
-            Ok(Some(edit_doc)) => Some(edit_doc),
+        Ok(())
-            Ok(None) => None,
-            Err(e) => {
-                log::error!("{}", e);
-                None
-            },
-        }
     }
 }
 

backend/src/services/view/view.rs

@@ -1,7 +1,7 @@
 use crate::{
     entities::workspace::{ViewTable, VIEW_TABLE},
     services::{
-        doc::{create_doc, delete_doc},
+        doc::{create_doc_with_transaction, delete_doc},
         trash::read_trash_ids,
         user::LoggedUser,
         view::sql_builder::*,
@@ -94,7 +94,7 @@ pub(crate) async fn create_view_with_args(
     let mut create_doc_params = CreateDocParams::new();
     create_doc_params.set_data(view_data);
     create_doc_params.set_id(view.id.clone());
-    let _ = create_doc(transaction, create_doc_params).await?;
+    let _ = create_doc_with_transaction(transaction, create_doc_params).await?;
     Ok(view)
 }
 

frontend/app_flowy/packages/flowy_sdk/lib/protobuf/flowy-collaboration/ws.pbenum.dart

@@ -14,14 +14,12 @@ class WsDataType extends $pb.ProtobufEnum {
   static const WsDataType PushRev = WsDataType._(1, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'PushRev');
   static const WsDataType PullRev = WsDataType._(2, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'PullRev');
   static const WsDataType Conflict = WsDataType._(3, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'Conflict');
-  static const WsDataType NewDocUser = WsDataType._(4, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'NewDocUser');
 
   static const $core.List<WsDataType> values = <WsDataType> [
     Acked,
     PushRev,
     PullRev,
     Conflict,
-    NewDocUser,
   ];
 
   static final $core.Map<$core.int, WsDataType> _byValue = $pb.ProtobufEnum.initByValue(values);

frontend/app_flowy/packages/flowy_sdk/lib/protobuf/flowy-collaboration/ws.pbjson.dart

@@ -16,12 +16,11 @@ const WsDataType$json = const {
     const {'1': 'PushRev', '2': 1},
     const {'1': 'PullRev', '2': 2},
     const {'1': 'Conflict', '2': 3},
-    const {'1': 'NewDocUser', '2': 4},
   ],
 };
 
 /// Descriptor for `WsDataType`. Decode as a `google.protobuf.EnumDescriptorProto`.
-final $typed_data.Uint8List wsDataTypeDescriptor = $convert.base64Decode('CgpXc0RhdGFUeXBlEgkKBUFja2VkEAASCwoHUHVzaFJldhABEgsKB1B1bGxSZXYQAhIMCghDb25mbGljdBADEg4KCk5ld0RvY1VzZXIQBA==');
+final $typed_data.Uint8List wsDataTypeDescriptor = $convert.base64Decode('CgpXc0RhdGFUeXBlEgkKBUFja2VkEAASCwoHUHVzaFJldhABEgsKB1B1bGxSZXYQAhIMCghDb25mbGljdBAD');
 @$core.Deprecated('Use wsDocumentDataDescriptor instead')
 const WsDocumentData$json = const {
   '1': 'WsDocumentData',

frontend/rust-lib/flowy-document/src/services/doc/controller.rs

@@ -55,7 +55,7 @@ impl DocController {
     }
 
     pub(crate) fn close(&self, doc_id: &str) -> Result<(), DocError> {
-        log::debug!("Close doc {}", doc_id);
+        tracing::debug!("Close doc {}", doc_id);
         self.open_cache.remove(doc_id);
         self.ws_manager.remove_handler(doc_id);
         Ok(())

frontend/rust-lib/flowy-document/src/services/doc/edit/editor.rs

@@ -63,7 +63,7 @@ impl ClientDocEditor {
             stop_sync_tx,
         });
 
-        edit_doc.notify_open_doc();
+        // edit_doc.notify_open_doc();
 
         start_sync(edit_doc.clone(), ws_msg_rx, cloned_stop_sync_tx);
         Ok(edit_doc)
@@ -165,7 +165,7 @@ impl ClientDocEditor {
         let delta_data = delta_data.to_vec();
         let user_id = self.user.user_id()?;
         let revision = Revision::new(base_rev_id, rev_id, delta_data, &self.doc_id, RevType::Local, user_id);
-        let _ = self.rev_manager.add_revision(&revision).await?;
+        let _ = self.rev_manager.add_local_revision(&revision).await?;
         Ok(rev_id.into())
     }
 
@@ -246,7 +246,7 @@ impl ClientDocEditor {
             RevType::Remote,
             user_id,
         );
-        let _ = self.rev_manager.add_revision(&revision).await?;
+        let _ = self.rev_manager.add_remote_revision(&revision).await?;
 
         // send the server_prime delta
         let user_id = self.user.user_id()?;
@@ -264,10 +264,8 @@ impl ClientDocEditor {
 
     pub async fn handle_ws_message(&self, doc_data: WsDocumentData) -> DocResult<()> {
         match self.ws_msg_tx.send(doc_data) {
-            Ok(_) => {
+            Ok(_) => {},
-                tracing::debug!("Propagate ws message data success")
+            Err(e) => tracing::error!("❌Propagate ws message failed. {}", e),
-            },
-            Err(e) => tracing::error!("Propagate ws message data failed. {}", e),
         }
         Ok(())
     }
@@ -286,7 +284,7 @@ impl WsDocumentHandler for EditDocWsHandler {
         let edit_doc = self.0.clone();
         tokio::spawn(async move {
             if let Err(e) = edit_doc.handle_ws_message(doc_data).await {
-                log::error!("{:?}", e);
+                tracing::error!("❌{:?}", e);
             }
         });
     }

frontend/rust-lib/flowy-document/src/services/doc/edit/model.rs

@@ -1,10 +1,13 @@
+#![allow(clippy::all)]
+#![cfg_attr(rustfmt, rustfmt::skip)]
 use crate::{errors::DocError, services::ws::DocumentWebSocket};
-use flowy_collaboration::entities::doc::NewDocUser;
+
 use futures::future::BoxFuture;
 use lib_infra::retry::Action;
 use lib_ot::revision::RevId;
 use std::{future, sync::Arc};
 
+#[allow(dead_code)]
 pub(crate) struct OpenDocAction {
     user_id: String,
     rev_id: RevId,
@@ -29,15 +32,16 @@ impl Action for OpenDocAction {
     type Error = DocError;
 
     fn run(&mut self) -> Self::Future {
-        let new_doc_user = NewDocUser {
+        // let new_doc_user = NewDocUser {
-            user_id: self.user_id.clone(),
+        //     user_id: self.user_id.clone(),
-            rev_id: self.rev_id.clone().into(),
+        //     rev_id: self.rev_id.clone().into(),
-            doc_id: self.doc_id.clone(),
+        //     doc_id: self.doc_id.clone(),
-        };
+        // };
-
+        //
-        match self.ws.send(new_doc_user.into()) {
+        // match self.ws.send(new_doc_user.into()) {
-            Ok(_) => Box::pin(future::ready(Ok::<(), DocError>(()))),
+        //     Ok(_) => Box::pin(future::ready(Ok::<(), DocError>(()))),
-            Err(e) => Box::pin(future::ready(Err::<(), DocError>(e))),
+        //     Err(e) => Box::pin(future::ready(Err::<(), DocError>(e))),
-        }
+        // }
+        Box::pin(future::ready(Ok::<(), DocError>(())))
     }
 }

frontend/rust-lib/flowy-document/src/services/doc/revision/cache/cache.rs

@@ -1,6 +1,10 @@
 use crate::{
     errors::{internal_error, DocError, DocResult},
-    services::doc::revision::RevisionServer,
+    services::doc::revision::{
+        cache::{disk::RevisionDiskCache, memory::RevisionMemoryCache},
+        RevisionRecord,
+        RevisionServer,
+    },
     sql_tables::RevTableSql,
 };
 use flowy_collaboration::entities::doc::Doc;
@@ -8,7 +12,7 @@ use flowy_database::ConnectionPool;
 use lib_infra::future::FutureResult;
 use lib_ot::{
     core::{Operation, OperationTransformable},
-    revision::{RevState, RevType, Revision, RevisionDiskCache, RevisionMemoryCache, RevisionRange, RevisionRecord},
+    revision::{RevState, RevType, Revision, RevisionRange},
     rich_text::RichTextDelta,
 };
 use std::{sync::Arc, time::Duration};
@@ -53,11 +57,29 @@ impl RevisionCache {
     }
 
     #[tracing::instrument(level = "debug", skip(self, revision))]
-    pub async fn add_revision(&self, revision: Revision) -> DocResult<()> {
+    pub async fn add_local_revision(&self, revision: Revision) -> DocResult<()> {
         if self.memory_cache.contains(&revision.rev_id) {
             return Err(DocError::duplicate_rev().context(format!("Duplicate revision id: {}", revision.rev_id)));
         }
-        self.memory_cache.add_revision(revision.clone()).await?;
+        let record = RevisionRecord {
+            revision,
+            state: RevState::Local,
+        };
+        self.memory_cache.add_revision(record).await?;
+        self.save_revisions().await;
+        Ok(())
+    }
+
+    #[tracing::instrument(level = "debug", skip(self, revision))]
+    pub async fn add_remote_revision(&self, revision: Revision) -> DocResult<()> {
+        if self.memory_cache.contains(&revision.rev_id) {
+            return Err(DocError::duplicate_rev().context(format!("Duplicate revision id: {}", revision.rev_id)));
+        }
+        let record = RevisionRecord {
+            revision,
+            state: RevState::Local,
+        };
+        self.memory_cache.add_revision(record).await?;
         self.save_revisions().await;
         Ok(())
     }
@@ -68,8 +90,17 @@ impl RevisionCache {
         self.save_revisions().await;
     }
 
-    pub async fn query_revision(&self, rev_id: i64) -> Option<RevisionRecord> {
+    pub async fn query_revision(&self, doc_id: &str, rev_id: i64) -> Option<RevisionRecord> {
-        self.memory_cache.query_revision(&rev_id).await
+        match self.memory_cache.query_revision(&rev_id).await {
+            None => match self.dish_cache.read_revision(doc_id, rev_id) {
+                Ok(revision) => revision,
+                Err(e) => {
+                    log::error!("query_revision error: {:?}", e);
+                    None
+                },
+            },
+            Some(record) => Some(record),
+        }
     }
 
     async fn save_revisions(&self) {
@@ -102,9 +133,15 @@ impl RevisionCache {
         } else {
             let doc_id = self.doc_id.clone();
             let disk_cache = self.dish_cache.clone();
-            spawn_blocking(move || disk_cache.revisions_in_range(&doc_id, &range))
+            let records = spawn_blocking(move || disk_cache.revisions_in_range(&doc_id, &range))
                 .await
-                .map_err(internal_error)?
+                .map_err(internal_error)??;
+
+            let revisions = records
+                .into_iter()
+                .map(|record| record.revision)
+                .collect::<Vec<Revision>>();
+            Ok(revisions)
         }
     }
 
@@ -126,11 +163,8 @@ impl RevisionCache {
             RevType::Remote,
             self.user_id.clone(),
         );
-        let record = RevisionRecord {
+
-            revision,
+        self.add_remote_revision(revision).await?;
-            state: RevState::Acked,
-        };
-        let _ = self.dish_cache.create_revisions(vec![record])?;
         Ok(doc)
     }
 }
@@ -141,14 +175,14 @@ impl RevisionIterator for RevisionCache {
         let disk_cache = self.dish_cache.clone();
         let doc_id = self.doc_id.clone();
         FutureResult::new(async move {
-            match memory_cache.front_revision().await {
+            match memory_cache.front_local_revision().await {
                 None => {
                     //
-                    match memory_cache.front_rev_id().await {
+                    match memory_cache.front_local_rev_id().await {
                         None => Ok(None),
                         Some(rev_id) => match disk_cache.read_revision(&doc_id, rev_id)? {
                             None => Ok(None),
-                            Some(revision) => Ok(Some(RevisionRecord::new(revision))),
+                            Some(record) => Ok(Some(record)),
                         },
                     }
                 },
@@ -166,25 +200,25 @@ async fn load_from_disk(
     let doc_id = doc_id.to_owned();
     let (tx, mut rx) = mpsc::channel(2);
     let doc = spawn_blocking(move || {
-        let revisions = disk_cache.read_revisions(&doc_id)?;
+        let records = disk_cache.read_revisions(&doc_id)?;
-        if revisions.is_empty() {
+        if records.is_empty() {
             return Err(DocError::doc_not_found().context("Local doesn't have this document"));
         }
 
-        let (base_rev_id, rev_id) = revisions.last().unwrap().pair_rev_id();
+        let (base_rev_id, rev_id) = records.last().unwrap().revision.pair_rev_id();
         let mut delta = RichTextDelta::new();
-        for (_, revision) in revisions.into_iter().enumerate() {
+        for (_, record) in records.into_iter().enumerate() {
             // Opti: revision's clone may cause memory issues
-            match RichTextDelta::from_bytes(revision.clone().delta_data) {
+            match RichTextDelta::from_bytes(record.revision.clone().delta_data) {
                 Ok(local_delta) => {
                     delta = delta.compose(&local_delta)?;
-                    match tx.blocking_send(revision) {
+                    match tx.blocking_send(record) {
                         Ok(_) => {},
-                        Err(e) => log::error!("Load document from disk error: {}", e),
+                        Err(e) => tracing::error!("❌Load document from disk error: {}", e),
                     }
                 },
                 Err(e) => {
-                    log::error!("Deserialize delta from revision failed: {}", e);
+                    tracing::error!("Deserialize delta from revision failed: {}", e);
                 },
             }
         }
@@ -200,13 +234,12 @@ async fn load_from_disk(
     .await
     .map_err(internal_error)?;
 
-    while let Some(revision) = rx.recv().await {
+    while let Some(record) = rx.recv().await {
-        match memory_cache.add_revision(revision).await {
+        match memory_cache.add_revision(record).await {
             Ok(_) => {},
             Err(e) => log::error!("{:?}", e),
         }
     }
-
     doc
 }
 
@@ -217,7 +250,7 @@ fn correct_delta_if_need(delta: &mut RichTextDelta) {
 
     let data = delta.ops.last().as_ref().unwrap().get_data();
     if !data.ends_with('\n') {
-        log::error!("The op must end with newline. Correcting it by inserting newline op");
+        log::error!("❌The op must end with newline. Correcting it by inserting newline op");
         delta.ops.push(Operation::Insert("\n".into()));
     }
 }
@@ -238,19 +271,19 @@ impl RevisionDiskCache for Persistence {
         })
     }
 
-    fn revisions_in_range(&self, doc_id: &str, range: &RevisionRange) -> Result<Vec<Revision>, Self::Error> {
+    fn revisions_in_range(&self, doc_id: &str, range: &RevisionRange) -> Result<Vec<RevisionRecord>, Self::Error> {
         let conn = &*self.pool.get().map_err(internal_error).unwrap();
         let revisions = RevTableSql::read_rev_tables_with_range(&self.user_id, doc_id, range.clone(), conn)?;
         Ok(revisions)
     }
 
-    fn read_revision(&self, doc_id: &str, rev_id: i64) -> Result<Option<Revision>, Self::Error> {
+    fn read_revision(&self, doc_id: &str, rev_id: i64) -> Result<Option<RevisionRecord>, Self::Error> {
         let conn = self.pool.get().map_err(internal_error)?;
         let some = RevTableSql::read_rev_table(&self.user_id, doc_id, &rev_id, &*conn)?;
         Ok(some)
     }
 
-    fn read_revisions(&self, doc_id: &str) -> Result<Vec<Revision>, Self::Error> {
+    fn read_revisions(&self, doc_id: &str) -> Result<Vec<RevisionRecord>, Self::Error> {
         let conn = self.pool.get().map_err(internal_error)?;
         let some = RevTableSql::read_rev_tables(&self.user_id, doc_id, &*conn)?;
         Ok(some)

frontend/rust-lib/flowy-document/src/services/doc/revision/cache/disk.rs

@@ -0,0 +1,12 @@
+use crate::services::doc::revision::RevisionRecord;
+
+use lib_ot::revision::RevisionRange;
+use std::fmt::Debug;
+
+pub trait RevisionDiskCache: Sync + Send {
+    type Error: Debug;
+    fn create_revisions(&self, revisions: Vec<RevisionRecord>) -> Result<(), Self::Error>;
+    fn revisions_in_range(&self, doc_id: &str, range: &RevisionRange) -> Result<Vec<RevisionRecord>, Self::Error>;
+    fn read_revision(&self, doc_id: &str, rev_id: i64) -> Result<Option<RevisionRecord>, Self::Error>;
+    fn read_revisions(&self, doc_id: &str) -> Result<Vec<RevisionRecord>, Self::Error>;
+}

frontend/rust-lib/flowy-document/src/services/doc/revision/cache/memory.rs

@@ -0,0 +1,126 @@
+use crate::services::doc::revision::RevisionRecord;
+use dashmap::DashMap;
+use lib_ot::{
+    errors::OTError,
+    revision::{RevState, Revision, RevisionRange},
+};
+use std::{collections::VecDeque, sync::Arc};
+use tokio::sync::RwLock;
+
+pub struct RevisionMemoryCache {
+    revs_map: Arc<DashMap<i64, RevisionRecord>>,
+    local_revs: Arc<RwLock<VecDeque<i64>>>,
+}
+
+impl std::default::Default for RevisionMemoryCache {
+    fn default() -> Self {
+        let local_revs = Arc::new(RwLock::new(VecDeque::new()));
+        RevisionMemoryCache {
+            revs_map: Arc::new(DashMap::new()),
+            local_revs,
+        }
+    }
+}
+
+impl RevisionMemoryCache {
+    pub fn new() -> Self { RevisionMemoryCache::default() }
+
+    pub async fn add_revision(&self, record: RevisionRecord) -> Result<(), OTError> {
+        // The last revision's rev_id must be greater than the new one.
+        if let Some(rev_id) = self.local_revs.read().await.back() {
+            if *rev_id >= record.revision.rev_id {
+                return Err(OTError::revision_id_conflict()
+                    .context(format!("The new revision's id must be greater than {}", rev_id)));
+            }
+        }
+
+        match record.state {
+            RevState::Local => {
+                tracing::debug!("{}:add revision {}", record.revision.doc_id, record.revision.rev_id);
+                self.local_revs.write().await.push_back(record.revision.rev_id);
+            },
+            RevState::Acked => {},
+        }
+
+        self.revs_map.insert(record.revision.rev_id, record);
+        Ok(())
+    }
+
+    pub fn remove_revisions(&self, ids: Vec<i64>) { self.revs_map.retain(|k, _| !ids.contains(k)); }
+
+    pub async fn ack_revision(&self, rev_id: &i64) {
+        if let Some(pop_rev_id) = self.front_local_rev_id().await {
+            if &pop_rev_id != rev_id {
+                return;
+            }
+        }
+
+        match self.local_revs.write().await.pop_front() {
+            None => tracing::error!("❌The local_revs should not be empty"),
+            Some(pop_rev_id) => {
+                if &pop_rev_id != rev_id {
+                    tracing::error!("The front rev_id:{} not equal to ack rev_id: {}", pop_rev_id, rev_id);
+                    assert_eq!(&pop_rev_id, rev_id);
+                } else {
+                    tracing::debug!("pop revision {}", pop_rev_id);
+                }
+            },
+        }
+    }
+
+    pub async fn revisions_in_range(&self, range: &RevisionRange) -> Result<Vec<Revision>, OTError> {
+        let revs = range
+            .iter()
+            .flat_map(|rev_id| match self.revs_map.get(&rev_id) {
+                None => None,
+                Some(record) => Some(record.revision.clone()),
+            })
+            .collect::<Vec<Revision>>();
+
+        if revs.len() == range.len() as usize {
+            Ok(revs)
+        } else {
+            Ok(vec![])
+        }
+    }
+
+    pub fn contains(&self, rev_id: &i64) -> bool { self.revs_map.contains_key(rev_id) }
+
+    pub fn is_empty(&self) -> bool { self.revs_map.is_empty() }
+
+    pub fn revisions(&self) -> (Vec<i64>, Vec<RevisionRecord>) {
+        let mut records: Vec<RevisionRecord> = vec![];
+        let mut ids: Vec<i64> = vec![];
+
+        self.revs_map.iter().for_each(|kv| {
+            records.push(kv.value().clone());
+            ids.push(*kv.key());
+        });
+        (ids, records)
+    }
+
+    pub async fn query_revision(&self, rev_id: &i64) -> Option<RevisionRecord> {
+        self.revs_map.get(&rev_id).map(|r| r.value().clone())
+    }
+
+    pub async fn front_local_revision(&self) -> Option<(i64, RevisionRecord)> {
+        match self.local_revs.read().await.front() {
+            None => None,
+            Some(rev_id) => match self.revs_map.get(rev_id).map(|r| (*r.key(), r.value().clone())) {
+                None => None,
+                Some(val) => {
+                    tracing::debug!("{}:try send revision {}", val.1.revision.doc_id, val.1.revision.rev_id);
+                    Some(val)
+                },
+            },
+        }
+    }
+
+    pub async fn front_local_rev_id(&self) -> Option<i64> { self.local_revs.read().await.front().copied() }
+}
+
+#[cfg(feature = "flowy_unit_test")]
+impl RevisionMemoryCache {
+    pub fn revs_map(&self) -> Arc<DashMap<i64, RevisionRecord>> { self.revs_map.clone() }
+    pub fn pending_revs(&self) -> Arc<RwLock<VecDeque<i64>>> { self.local_revs.clone() }
+}

frontend/rust-lib/flowy-document/src/services/doc/revision/cache/mod.rs

@@ -0,0 +1,8 @@
+#![allow(clippy::module_inception)]
+mod cache;
+mod disk;
+mod memory;
+mod model;
+
+pub use cache::*;
+pub use model::*;

frontend/rust-lib/flowy-document/src/services/doc/revision/cache/model.rs

@@ -0,0 +1,15 @@
+use lib_ot::revision::{RevState, Revision};
+use tokio::sync::broadcast;
+
+pub type RevIdReceiver = broadcast::Receiver<i64>;
+pub type RevIdSender = broadcast::Sender<i64>;
+
+#[derive(Clone)]
+pub struct RevisionRecord {
+    pub revision: Revision,
+    pub state: RevState,
+}
+
+impl RevisionRecord {
+    pub fn ack(&mut self) { self.state = RevState::Acked; }
+}

frontend/rust-lib/flowy-document/src/services/doc/revision/manager.rs

@@ -44,8 +44,13 @@ impl RevisionManager {
         Ok(doc.delta()?)
     }
 
-    pub async fn add_revision(&self, revision: &Revision) -> Result<(), DocError> {
+    pub async fn add_remote_revision(&self, revision: &Revision) -> Result<(), DocError> {
-        let _ = self.cache.add_revision(revision.clone()).await?;
+        let _ = self.cache.add_remote_revision(revision.clone()).await?;
+        Ok(())
+    }
+
+    pub async fn add_local_revision(&self, revision: &Revision) -> Result<(), DocError> {
+        let _ = self.cache.add_local_revision(revision.clone()).await?;
         Ok(())
     }
 

frontend/rust-lib/flowy-document/src/services/doc/revision/sync.rs

@@ -54,8 +54,13 @@ impl RevisionDownStream {
                 tokio::select! {
                     result = receiver.recv() => {
                         match result {
-                            Some(msg) => yield msg,
+                            Some(msg) => {
-                            None => {},
+                                yield msg
+                            },
+                            None => {
+                                tracing::debug!("[RevisionDownStream:{}] loop exit", doc_id);
+                                break;
+                            },
                         }
                     },
                     _ = stop_rx.recv() => {
@@ -82,7 +87,7 @@ impl RevisionDownStream {
             .await
             .map_err(internal_error)?;
 
-        log::debug!("[RevisionDownStream]: receives new message: {:?}", ty);
+        tracing::debug!("[RevisionDownStream]: receives new message: {:?}", ty);
         match ty {
             WsDataType::PushRev => {
                 let _ = self.editor.handle_push_rev(bytes).await?;
@@ -97,7 +102,6 @@ impl RevisionDownStream {
                 let _ = self.rev_manager.ack_revision(rev_id).await?;
             },
             WsDataType::Conflict => {},
-            WsDataType::NewDocUser => {},
         }
 
         Ok(())
@@ -145,7 +149,7 @@ impl RevisionUpStream {
                     result = rx.recv() => {
                         match result {
                             Some(msg) => yield msg,
-                            None => {},
+                            None => break,
                         }
                     },
                     _ = stop_rx.recv() => {

frontend/rust-lib/flowy-document/src/sql_tables/doc/rev_sql.rs

@@ -1,10 +1,11 @@
 use crate::{
     errors::DocError,
-    sql_tables::{doc::RevTable, mk_revision_from_table, RevChangeset, RevTableState, RevTableType},
+    services::doc::revision::RevisionRecord,
+    sql_tables::{doc::RevTable, mk_revision_record_from_table, RevChangeset, RevTableState, RevTableType},
 };
 use diesel::update;
 use flowy_database::{insert_or_ignore_into, prelude::*, schema::rev_table::dsl, SqliteConnection};
-use lib_ot::revision::{Revision, RevisionRange, RevisionRecord};
+use lib_ot::revision::RevisionRange;
 
 pub struct RevTableSql {}
 
@@ -45,7 +46,7 @@ impl RevTableSql {
         user_id: &str,
         doc_id: &str,
         conn: &SqliteConnection,
-    ) -> Result<Vec<Revision>, DocError> {
+    ) -> Result<Vec<RevisionRecord>, DocError> {
         let filter = dsl::rev_table
             .filter(dsl::doc_id.eq(doc_id))
             .order(dsl::rev_id.asc())
@@ -53,8 +54,8 @@ impl RevTableSql {
         let rev_tables = filter.load::<RevTable>(conn)?;
         let revisions = rev_tables
             .into_iter()
-            .map(|table| mk_revision_from_table(user_id, table))
+            .map(|table| mk_revision_record_from_table(user_id, table))
-            .collect::<Vec<Revision>>();
+            .collect::<Vec<_>>();
         Ok(revisions)
     }
 
@@ -63,7 +64,7 @@ impl RevTableSql {
         doc_id: &str,
         revision_id: &i64,
         conn: &SqliteConnection,
-    ) -> Result<Option<Revision>, DocError> {
+    ) -> Result<Option<RevisionRecord>, DocError> {
         let filter = dsl::rev_table
             .filter(dsl::doc_id.eq(doc_id))
             .filter(dsl::rev_id.eq(revision_id));
@@ -72,7 +73,7 @@ impl RevTableSql {
         if Err(diesel::NotFound) == result {
             Ok(None)
         } else {
-            Ok(Some(mk_revision_from_table(user_id, result?)))
+            Ok(Some(mk_revision_record_from_table(user_id, result?)))
         }
     }
 
@@ -81,7 +82,7 @@ impl RevTableSql {
         doc_id: &str,
         range: RevisionRange,
         conn: &SqliteConnection,
-    ) -> Result<Vec<Revision>, DocError> {
+    ) -> Result<Vec<RevisionRecord>, DocError> {
         let rev_tables = dsl::rev_table
             .filter(dsl::rev_id.ge(range.start))
             .filter(dsl::rev_id.le(range.end))
@@ -91,8 +92,8 @@ impl RevTableSql {
 
         let revisions = rev_tables
             .into_iter()
-            .map(|table| mk_revision_from_table(user_id, table))
+            .map(|table| mk_revision_record_from_table(user_id, table))
-            .collect::<Vec<Revision>>();
+            .collect::<Vec<_>>();
         Ok(revisions)
     }
 

frontend/rust-lib/flowy-document/src/sql_tables/doc/rev_table.rs

@@ -1,7 +1,7 @@
+use crate::services::doc::revision::RevisionRecord;
 use diesel::sql_types::Integer;
-use flowy_database::schema::rev_table;
-
 use flowy_collaboration::util::md5;
+use flowy_database::schema::rev_table;
 use lib_ot::revision::{RevId, RevState, RevType, Revision};
 
 #[derive(PartialEq, Clone, Debug, Queryable, Identifiable, Insertable, Associations)]
@@ -64,9 +64,9 @@ impl std::convert::From<RevState> for RevTableState {
     }
 }
 
-pub(crate) fn mk_revision_from_table(user_id: &str, table: RevTable) -> Revision {
+pub(crate) fn mk_revision_record_from_table(user_id: &str, table: RevTable) -> RevisionRecord {
     let md5 = md5(&table.data);
-    Revision {
+    let revision = Revision {
         base_rev_id: table.base_rev_id,
         rev_id: table.rev_id,
         delta_data: table.data,
@@ -74,6 +74,10 @@ pub(crate) fn mk_revision_from_table(user_id: &str, table: RevTable) -> Revision
         doc_id: table.doc_id,
         ty: table.ty.into(),
         user_id: user_id.to_owned(),
+    };
+    RevisionRecord {
+        revision,
+        state: table.state.into(),
     }
 }
 

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

@@ -1,5 +1,5 @@
 use flowy_test::editor::{EditorScript::*, *};
-use lib_ot::{revision::RevState, rich_text::RichTextDeltaBuilder};
+use lib_ot::revision::RevState;
 
 #[tokio::test]
 async fn doc_rev_state_test1() {
@@ -40,12 +40,11 @@ async fn doc_rev_state_test2() {
 
 #[tokio::test]
 async fn doc_push_test() {
-    let delta = RichTextDeltaBuilder::new().insert("abc\n").build();
+    // let delta = RichTextDeltaBuilder::new().insert("abc\n").build();
     let scripts = vec![
         InsertText("1", 0),
         InsertText("2", 1),
         InsertText("3", 2),
-        SimulatePushRevisionMessageWithDelta(delta),
         AssertJson(r#"[{"insert":"123\nabc\n"}]"#),
     ];
     EditorTest::new().await.run_scripts(scripts).await;

frontend/rust-lib/flowy-net/src/protobuf/model/network_state.rs

@@ -231,21 +231,21 @@ static file_descriptor_proto_data: &'static [u8] = b"\
     \n\x13network_state.proto\",\n\x0cNetworkState\x12\x1c\n\x02ty\x18\x01\
     \x20\x01(\x0e2\x0c.NetworkTypeR\x02ty*G\n\x0bNetworkType\x12\x16\n\x12Un\
     knownNetworkType\x10\0\x12\x08\n\x04Wifi\x10\x01\x12\x08\n\x04Cell\x10\
-    \x02\x12\x0c\n\x08Ethernet\x10\x03J\x9d\x02\n\x06\x12\x04\0\0\t\x01\n\
+    \x02\x12\x0c\n\x08Ethernet\x10\x03J\x9d\x02\n\x06\x12\x04\0\0\n\x01\n\
-    \x08\n\x01\x0c\x12\x03\0\0\x12\n\n\n\x02\x04\0\x12\x04\x01\0\x03\x01\n\n\
+    \x08\n\x01\x0c\x12\x03\0\0\x12\n\n\n\x02\x04\0\x12\x04\x02\0\x04\x01\n\n\
-    \n\x03\x04\0\x01\x12\x03\x01\x08\x14\n\x0b\n\x04\x04\0\x02\0\x12\x03\x02\
+    \n\x03\x04\0\x01\x12\x03\x02\x08\x14\n\x0b\n\x04\x04\0\x02\0\x12\x03\x03\
-    \x04\x17\n\x0c\n\x05\x04\0\x02\0\x06\x12\x03\x02\x04\x0f\n\x0c\n\x05\x04\
+    \x04\x17\n\x0c\n\x05\x04\0\x02\0\x06\x12\x03\x03\x04\x0f\n\x0c\n\x05\x04\
-    \0\x02\0\x01\x12\x03\x02\x10\x12\n\x0c\n\x05\x04\0\x02\0\x03\x12\x03\x02\
+    \0\x02\0\x01\x12\x03\x03\x10\x12\n\x0c\n\x05\x04\0\x02\0\x03\x12\x03\x03\
-    \x15\x16\n\n\n\x02\x05\0\x12\x04\x04\0\t\x01\n\n\n\x03\x05\0\x01\x12\x03\
+    \x15\x16\n\n\n\x02\x05\0\x12\x04\x05\0\n\x01\n\n\n\x03\x05\0\x01\x12\x03\
-    \x04\x05\x10\n\x0b\n\x04\x05\0\x02\0\x12\x03\x05\x04\x1b\n\x0c\n\x05\x05\
+    \x05\x05\x10\n\x0b\n\x04\x05\0\x02\0\x12\x03\x06\x04\x1b\n\x0c\n\x05\x05\
-    \0\x02\0\x01\x12\x03\x05\x04\x16\n\x0c\n\x05\x05\0\x02\0\x02\x12\x03\x05\
+    \0\x02\0\x01\x12\x03\x06\x04\x16\n\x0c\n\x05\x05\0\x02\0\x02\x12\x03\x06\
-    \x19\x1a\n\x0b\n\x04\x05\0\x02\x01\x12\x03\x06\x04\r\n\x0c\n\x05\x05\0\
+    \x19\x1a\n\x0b\n\x04\x05\0\x02\x01\x12\x03\x07\x04\r\n\x0c\n\x05\x05\0\
-    \x02\x01\x01\x12\x03\x06\x04\x08\n\x0c\n\x05\x05\0\x02\x01\x02\x12\x03\
+    \x02\x01\x01\x12\x03\x07\x04\x08\n\x0c\n\x05\x05\0\x02\x01\x02\x12\x03\
-    \x06\x0b\x0c\n\x0b\n\x04\x05\0\x02\x02\x12\x03\x07\x04\r\n\x0c\n\x05\x05\
+    \x07\x0b\x0c\n\x0b\n\x04\x05\0\x02\x02\x12\x03\x08\x04\r\n\x0c\n\x05\x05\
-    \0\x02\x02\x01\x12\x03\x07\x04\x08\n\x0c\n\x05\x05\0\x02\x02\x02\x12\x03\
+    \0\x02\x02\x01\x12\x03\x08\x04\x08\n\x0c\n\x05\x05\0\x02\x02\x02\x12\x03\
-    \x07\x0b\x0c\n\x0b\n\x04\x05\0\x02\x03\x12\x03\x08\x04\x11\n\x0c\n\x05\
+    \x08\x0b\x0c\n\x0b\n\x04\x05\0\x02\x03\x12\x03\t\x04\x11\n\x0c\n\x05\x05\
-    \x05\0\x02\x03\x01\x12\x03\x08\x04\x0c\n\x0c\n\x05\x05\0\x02\x03\x02\x12\
+    \0\x02\x03\x01\x12\x03\t\x04\x0c\n\x0c\n\x05\x05\0\x02\x03\x02\x12\x03\t\
-    \x03\x08\x0f\x10b\x06proto3\
+    \x0f\x10b\x06proto3\
 ";
 
 static file_descriptor_proto_lazy: ::protobuf::rt::LazyV2<::protobuf::descriptor::FileDescriptorProto> = ::protobuf::rt::LazyV2::INIT;

frontend/rust-lib/flowy-net/src/protobuf/proto/network_state.proto

@@ -1,4 +1,5 @@
 syntax = "proto3";
+
 message NetworkState {
     NetworkType ty = 1;
 }

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

@@ -76,7 +76,7 @@ impl EditorTest {
                 self.editor.redo().await.unwrap();
             },
             EditorScript::AssertRevisionState(rev_id, state) => {
-                let record = cache.query_revision(rev_id).await.unwrap();
+                let record = cache.query_revision(&doc_id, rev_id).await.unwrap();
                 assert_eq!(record.state, state);
             },
             EditorScript::AssertCurrentRevId(rev_id) => {

frontend/rust-lib/flowy-user/src/services/server/ws_mock.rs

@@ -7,7 +7,7 @@ use dashmap::DashMap;
 use flowy_collaboration::{
     core::sync::{ServerDocManager, ServerDocPersistence},
     entities::{
-        doc::{Doc, NewDocUser},
+        doc::Doc,
         ws::{WsDataType, WsDocumentData},
     },
     errors::CollaborateError,
@@ -16,9 +16,13 @@ use lazy_static::lazy_static;
 use lib_infra::future::{FutureResult, FutureResultSend};
 use lib_ot::{revision::Revision, rich_text::RichTextDelta};
 use lib_ws::{WsConnectState, WsMessage, WsMessageHandler, WsModule};
-use parking_lot::RwLock;
+
-use std::{convert::TryFrom, sync::Arc};
+use flowy_collaboration::core::sync::{RevisionUser, SyncResponse};
-use tokio::sync::{broadcast, broadcast::Receiver};
+use std::{
+    convert::{TryFrom, TryInto},
+    sync::Arc,
+};
+use tokio::sync::{broadcast, broadcast::Receiver, mpsc};
 
 pub struct MockWebSocket {
     handlers: DashMap<WsModule, Arc<dyn WsMessageHandler>>,
@@ -49,12 +53,11 @@ impl FlowyWebSocket for Arc<MockWebSocket> {
         tokio::spawn(async move {
             while let Ok(message) = ws_receiver.recv().await {
                 let ws_data = WsDocumentData::try_from(Bytes::from(message.data.clone())).unwrap();
-                match DOC_SERVER.handle_ws_data(ws_data).await {
+                let mut rx = DOC_SERVER.handle_ws_data(ws_data).await;
-                    None => {},
+                let new_ws_message = rx.recv().await.unwrap();
-                    Some(new_ws_message) => match cloned_ws.handlers.get(&new_ws_message.module) {
+                match cloned_ws.handlers.get(&new_ws_message.module) {
                     None => log::error!("Can't find any handler for message: {:?}", new_ws_message),
                     Some(handler) => handler.receive_message(new_ws_message.clone()),
-                    },
                 }
             }
         });
@@ -88,38 +91,131 @@ struct MockDocServer {
 
 impl std::default::Default for MockDocServer {
     fn default() -> Self {
-        let manager = Arc::new(ServerDocManager::new(Arc::new(MockDocServerPersistence {})));
+        let persistence = Arc::new(MockDocServerPersistence::default());
+        let manager = Arc::new(ServerDocManager::new(persistence));
         MockDocServer { manager }
     }
 }
 
 impl MockDocServer {
-    async fn handle_ws_data(&self, ws_data: WsDocumentData) -> Option<WsMessage> {
+    async fn handle_ws_data(&self, ws_data: WsDocumentData) -> mpsc::Receiver<WsMessage> {
         let bytes = Bytes::from(ws_data.data);
         match ws_data.ty {
-            WsDataType::Acked => {},
+            WsDataType::Acked => {
+                unimplemented!()
+            },
             WsDataType::PushRev => {
                 let revision = Revision::try_from(bytes).unwrap();
-                log::info!("{:?}", revision);
+                let handler = match self.manager.get(&revision.doc_id).await {
+                    None => self.manager.create_doc(revision.clone()).await.unwrap(),
+                    Some(handler) => handler,
+                };
+
+                let (tx, rx) = mpsc::channel(1);
+                let user = MockDocUser {
+                    user_id: revision.user_id.clone(),
+                    tx,
+                };
+                handler.apply_revision(Arc::new(user), revision).await.unwrap();
+                rx
             },
-            WsDataType::PullRev => {},
+            WsDataType::PullRev => {
-            WsDataType::Conflict => {},
+                unimplemented!()
-            WsDataType::NewDocUser => {
+            },
-                let new_doc_user = NewDocUser::try_from(bytes).unwrap();
+            WsDataType::Conflict => {
-                log::info!("{:?}", new_doc_user);
+                unimplemented!()
-                // NewDocUser
             },
         }
-        None
     }
 }
 
-struct MockDocServerPersistence {}
+struct MockDocServerPersistence {
+    inner: Arc<DashMap<String, Doc>>,
+}
+
+impl std::default::Default for MockDocServerPersistence {
+    fn default() -> Self {
+        MockDocServerPersistence {
+            inner: Arc::new(DashMap::new()),
+        }
+    }
+}
 
 impl ServerDocPersistence for MockDocServerPersistence {
-    fn update_doc(&self, doc_id: &str, rev_id: i64, delta: RichTextDelta) -> FutureResultSend<(), CollaborateError> {
+    fn update_doc(&self, _doc_id: &str, _rev_id: i64, _delta: RichTextDelta) -> FutureResultSend<(), CollaborateError> {
         unimplemented!()
     }
 
-    fn read_doc(&self, doc_id: &str) -> FutureResultSend<Doc, CollaborateError> { unimplemented!() }
+    fn read_doc(&self, doc_id: &str) -> FutureResultSend<Doc, CollaborateError> {
+        let inner = self.inner.clone();
+        let doc_id = doc_id.to_owned();
+        FutureResultSend::new(async move {
+            match inner.get(&doc_id) {
+                None => {
+                    //
+                    Err(CollaborateError::record_not_found())
+                },
+                Some(val) => {
+                    //
+                    Ok(val.value().clone())
+                },
+            }
+        })
+    }
+
+    fn create_doc(&self, revision: Revision) -> FutureResultSend<Doc, CollaborateError> {
+        FutureResultSend::new(async move {
+            let doc: Doc = revision.try_into().unwrap();
+            Ok(doc)
+        })
+    }
+}
+
+#[derive(Debug)]
+struct MockDocUser {
+    user_id: String,
+    tx: mpsc::Sender<WsMessage>,
+}
+
+impl RevisionUser for MockDocUser {
+    fn user_id(&self) -> String { self.user_id.clone() }
+
+    fn recv(&self, resp: SyncResponse) {
+        let sender = self.tx.clone();
+        tokio::spawn(async move {
+            match resp {
+                SyncResponse::Pull(data) => {
+                    let bytes: Bytes = data.try_into().unwrap();
+                    let msg = WsMessage {
+                        module: WsModule::Doc,
+                        data: bytes.to_vec(),
+                    };
+                    sender.send(msg).await.unwrap();
+                },
+                SyncResponse::Push(data) => {
+                    let bytes: Bytes = data.try_into().unwrap();
+                    let msg = WsMessage {
+                        module: WsModule::Doc,
+                        data: bytes.to_vec(),
+                    };
+                    sender.send(msg).await.unwrap();
+                },
+                SyncResponse::Ack(data) => {
+                    let bytes: Bytes = data.try_into().unwrap();
+                    let msg = WsMessage {
+                        module: WsModule::Doc,
+                        data: bytes.to_vec(),
+                    };
+                    sender.send(msg).await.unwrap();
+                },
+                SyncResponse::NewRevision {
+                    rev_id: _,
+                    doc_id: _,
+                    doc_json: _,
+                } => {
+                    // unimplemented!()
+                },
+            }
+        });
+    }
 }

shared-lib/flowy-collaboration/src/core/sync/server_editor.rs

@@ -23,6 +23,7 @@ use tokio::{
 pub trait ServerDocPersistence: Send + Sync {
     fn update_doc(&self, doc_id: &str, rev_id: i64, delta: RichTextDelta) -> FutureResultSend<(), CollaborateError>;
     fn read_doc(&self, doc_id: &str) -> FutureResultSend<Doc, CollaborateError>;
+    fn create_doc(&self, revision: Revision) -> FutureResultSend<Doc, CollaborateError>;
 }
 
 #[rustfmt::skip]
@@ -59,15 +60,36 @@ impl ServerDocManager {
         }
     }
 
-    pub async fn get(&self, doc_id: &str) -> Result<Option<Arc<OpenDocHandle>>, CollaborateError> {
+    pub async fn get(&self, doc_id: &str) -> Option<Arc<OpenDocHandle>> {
         match self.open_doc_map.get(doc_id).map(|ctx| ctx.clone()) {
-            Some(edit_doc) => Ok(Some(edit_doc)),
+            Some(edit_doc) => Some(edit_doc),
             None => {
+                let f = || async {
                     let doc = self.persistence.read_doc(doc_id).await?;
                     let handler = self.cache(doc).await.map_err(internal_error)?;
-                Ok(Some(handler))
+                    Ok::<Arc<OpenDocHandle>, CollaborateError>(handler)
+                };
+                match f().await {
+                    Ok(handler) => Some(handler),
+                    Err(e) => {
+                        log::error!("{}", e);
+                        None
                     },
                 }
+            },
+        }
+    }
+
+    pub async fn create_doc(&self, revision: Revision) -> Result<Arc<OpenDocHandle>, CollaborateError> {
+        if !revision.is_initial() {
+            return Err(
+                CollaborateError::revision_conflict().context("Revision's rev_id should be 0 when creating the doc")
+            );
+        }
+
+        let doc = self.persistence.create_doc(revision).await?;
+        let handler = self.cache(doc).await?;
+        Ok(handler)
     }
 
     async fn cache(&self, doc: Doc) -> Result<Arc<OpenDocHandle>, CollaborateError> {
@@ -93,13 +115,6 @@ impl OpenDocHandle {
         Ok(Self { sender })
     }
 
-    pub async fn add_user(&self, user: Arc<dyn RevisionUser>, rev_id: i64) -> Result<(), CollaborateError> {
-        let (ret, rx) = oneshot::channel();
-        let msg = DocCommand::NewConnectedUser { user, rev_id, ret };
-        let _ = self.send(msg, rx).await?;
-        Ok(())
-    }
-
     pub async fn apply_revision(
         &self,
         user: Arc<dyn RevisionUser>,
@@ -132,11 +147,6 @@ impl OpenDocHandle {
 
 #[derive(Debug)]
 enum DocCommand {
-    NewConnectedUser {
-        user: Arc<dyn RevisionUser>,
-        rev_id: i64,
-        ret: oneshot::Sender<CollaborateResult<()>>,
-    },
     ReceiveRevision {
         user: Arc<dyn RevisionUser>,
         revision: Revision,
@@ -183,10 +193,6 @@ impl DocCommandQueue {
 
     async fn handle_message(&self, msg: DocCommand) {
         match msg {
-            DocCommand::NewConnectedUser { user, rev_id, ret } => {
-                log::debug!("Receive new doc user: {:?}, rev_id: {}", user, rev_id);
-                let _ = ret.send(self.edit_doc.new_doc_user(user, rev_id).await.map_err(internal_error));
-            },
             DocCommand::ReceiveRevision { user, revision, ret } => {
                 // let revision = (&mut revision).try_into().map_err(internal_error).unwrap();
                 let _ = ret.send(
@@ -247,20 +253,6 @@ impl ServerDocEditor {
         })
     }
 
-    #[tracing::instrument(
-        level = "debug",
-        skip(self, user),
-        fields(
-            user_id = %user.user_id(),
-            rev_id = %rev_id,
-        )
-    )]
-    pub async fn new_doc_user(&self, user: Arc<dyn RevisionUser>, rev_id: i64) -> Result<(), OTError> {
-        self.users.insert(user.user_id(), user.clone());
-        self.synchronizer.new_conn(user, rev_id);
-        Ok(())
-    }
-
     #[tracing::instrument(
         level = "debug",
         skip(self, user, revision),

shared-lib/flowy-collaboration/src/core/sync/synchronizer.rs

@@ -55,29 +55,12 @@ impl RevisionSynchronizer {
         }
     }
 
-    pub fn new_conn(&self, user: Arc<dyn RevisionUser>, rev_id: i64) {
-        let cur_rev_id = self.rev_id.load(SeqCst);
-        match cur_rev_id.cmp(&rev_id) {
-            Ordering::Less => {
-                let msg = mk_pull_message(&self.doc_id, next(cur_rev_id), rev_id);
-                user.recv(SyncResponse::Pull(msg));
-            },
-            Ordering::Equal => {},
-            Ordering::Greater => {
-                let doc_delta = self.document.read().delta().clone();
-                let revision = self.mk_revision(rev_id, doc_delta);
-                let data = mk_push_message(&self.doc_id, revision);
-                user.recv(SyncResponse::Push(data));
-            },
-        }
-    }
-
     pub fn apply_revision(&self, user: Arc<dyn RevisionUser>, revision: Revision) -> Result<(), OTError> {
-        let cur_rev_id = self.rev_id.load(SeqCst);
+        let server_base_rev_id = self.rev_id.load(SeqCst);
-        match cur_rev_id.cmp(&revision.rev_id) {
+        match server_base_rev_id.cmp(&revision.rev_id) {
             Ordering::Less => {
-                let next_rev_id = next(cur_rev_id);
+                let server_rev_id = next(server_base_rev_id);
-                if cur_rev_id == revision.base_rev_id || next_rev_id == revision.base_rev_id {
+                if server_base_rev_id == revision.base_rev_id || server_rev_id == revision.rev_id {
                     // The rev is in the right order, just compose it.
                     let _ = self.compose_revision(&revision)?;
                     user.recv(SyncResponse::Ack(mk_acked_message(&revision)));
@@ -91,13 +74,14 @@ impl RevisionSynchronizer {
                     });
                 } else {
                     // The server document is outdated, pull the missing revision from the client.
-                    let msg = mk_pull_message(&self.doc_id, next_rev_id, revision.rev_id);
+                    let msg = mk_pull_message(&self.doc_id, server_rev_id, revision.rev_id);
                     user.recv(SyncResponse::Pull(msg));
                 }
             },
             Ordering::Equal => {
                 // Do nothing
                 log::warn!("Applied revision rev_id is the same as cur_rev_id");
+                user.recv(SyncResponse::Ack(mk_acked_message(&revision)));
             },
             Ordering::Greater => {
                 // The client document is outdated. Transform the client revision delta and then

shared-lib/flowy-collaboration/src/entities/doc/doc.rs

@@ -1,5 +1,6 @@
+use crate::errors::CollaborateError;
 use flowy_derive::ProtoBuf;
-use lib_ot::{errors::OTError, rich_text::RichTextDelta};
+use lib_ot::{errors::OTError, revision::Revision, rich_text::RichTextDelta};
 
 #[derive(ProtoBuf, Default, Debug, Clone)]
 pub struct CreateDocParams {
@@ -41,6 +42,28 @@ impl Doc {
     }
 }
 
+impl std::convert::TryFrom<Revision> for Doc {
+    type Error = CollaborateError;
+
+    fn try_from(revision: Revision) -> Result<Self, Self::Error> {
+        if !revision.is_initial() {
+            return Err(
+                CollaborateError::revision_conflict().context("Revision's rev_id should be 0 when creating the doc")
+            );
+        }
+
+        let delta = RichTextDelta::from_bytes(&revision.delta_data)?;
+        let doc_json = delta.to_json();
+
+        Ok(Doc {
+            id: revision.doc_id,
+            data: doc_json,
+            rev_id: revision.rev_id,
+            base_rev_id: revision.base_rev_id,
+        })
+    }
+}
+
 #[derive(ProtoBuf, Default, Debug, Clone)]
 pub struct UpdateDocParams {
     #[pb(index = 1)]

shared-lib/flowy-collaboration/src/entities/ws/ws.rs

@@ -1,4 +1,4 @@
-use crate::{entities::doc::NewDocUser, errors::CollaborateError};
+use crate::errors::CollaborateError;
 use bytes::Bytes;
 use flowy_derive::{ProtoBuf, ProtoBuf_Enum};
 use lib_ot::revision::{RevId, Revision, RevisionRange};
@@ -13,7 +13,6 @@ pub enum WsDataType {
     // The fronted receives the PullRev event means the backend try to pull the revision from frontend
     PullRev  = 2,
     Conflict = 3,
-    NewDocUser = 4,
 }
 
 impl WsDataType {
@@ -53,18 +52,6 @@ impl std::convert::From<Revision> for WsDocumentData {
     }
 }
 
-impl std::convert::From<NewDocUser> for WsDocumentData {
-    fn from(user: NewDocUser) -> Self {
-        let doc_id = user.doc_id.clone();
-        let bytes: Bytes = user.try_into().unwrap();
-        Self {
-            doc_id,
-            ty: WsDataType::NewDocUser,
-            data: bytes.to_vec(),
-        }
-    }
-}
-
 pub struct WsDocumentDataBuilder();
 impl WsDocumentDataBuilder {
     // WsDataType::PushRev -> Revision

shared-lib/flowy-collaboration/src/errors.rs

@@ -38,6 +38,8 @@ impl CollaborateError {
     static_doc_error!(undo, ErrorCode::UndoFail);
     static_doc_error!(redo, ErrorCode::RedoFail);
     static_doc_error!(out_of_bound, ErrorCode::OutOfBound);
+    static_doc_error!(record_not_found, ErrorCode::RecordNotFound);
+    static_doc_error!(revision_conflict, ErrorCode::RevisionConflict);
 }
 
 impl fmt::Display for CollaborateError {
@@ -51,6 +53,8 @@ pub enum ErrorCode {
     UndoFail         = 200,
     RedoFail         = 201,
     OutOfBound       = 202,
+    RevisionConflict = 203,
+    RecordNotFound   = 300,
     InternalError    = 1000,
 }
 

shared-lib/flowy-collaboration/src/protobuf/model/ws.rs

@@ -261,7 +261,6 @@ pub enum WsDataType {
     PushRev = 1,
     PullRev = 2,
     Conflict = 3,
-    NewDocUser = 4,
 }
 
 impl ::protobuf::ProtobufEnum for WsDataType {
@@ -275,7 +274,6 @@ impl ::protobuf::ProtobufEnum for WsDataType {
             1 => ::std::option::Option::Some(WsDataType::PushRev),
             2 => ::std::option::Option::Some(WsDataType::PullRev),
             3 => ::std::option::Option::Some(WsDataType::Conflict),
-            4 => ::std::option::Option::Some(WsDataType::NewDocUser),
             _ => ::std::option::Option::None
         }
     }
@@ -286,7 +284,6 @@ impl ::protobuf::ProtobufEnum for WsDataType {
             WsDataType::PushRev,
             WsDataType::PullRev,
             WsDataType::Conflict,
-            WsDataType::NewDocUser,
         ];
         values
     }
@@ -317,31 +314,28 @@ impl ::protobuf::reflect::ProtobufValue for WsDataType {
 static file_descriptor_proto_data: &'static [u8] = b"\
     \n\x08ws.proto\"X\n\x0eWsDocumentData\x12\x15\n\x06doc_id\x18\x01\x20\
     \x01(\tR\x05docId\x12\x1b\n\x02ty\x18\x02\x20\x01(\x0e2\x0b.WsDataTypeR\
-    \x02ty\x12\x12\n\x04data\x18\x03\x20\x01(\x0cR\x04data*O\n\nWsDataType\
+    \x02ty\x12\x12\n\x04data\x18\x03\x20\x01(\x0cR\x04data*?\n\nWsDataType\
     \x12\t\n\x05Acked\x10\0\x12\x0b\n\x07PushRev\x10\x01\x12\x0b\n\x07PullRe\
-    v\x10\x02\x12\x0c\n\x08Conflict\x10\x03\x12\x0e\n\nNewDocUser\x10\x04J\
+    v\x10\x02\x12\x0c\n\x08Conflict\x10\x03J\x8b\x03\n\x06\x12\x04\0\0\x0c\
-    \xb4\x03\n\x06\x12\x04\0\0\r\x01\n\x08\n\x01\x0c\x12\x03\0\0\x12\n\n\n\
+    \x01\n\x08\n\x01\x0c\x12\x03\0\0\x12\n\n\n\x02\x04\0\x12\x04\x02\0\x06\
-    \x02\x04\0\x12\x04\x02\0\x06\x01\n\n\n\x03\x04\0\x01\x12\x03\x02\x08\x16\
+    \x01\n\n\n\x03\x04\0\x01\x12\x03\x02\x08\x16\n\x0b\n\x04\x04\0\x02\0\x12\
-    \n\x0b\n\x04\x04\0\x02\0\x12\x03\x03\x04\x16\n\x0c\n\x05\x04\0\x02\0\x05\
+    \x03\x03\x04\x16\n\x0c\n\x05\x04\0\x02\0\x05\x12\x03\x03\x04\n\n\x0c\n\
-    \x12\x03\x03\x04\n\n\x0c\n\x05\x04\0\x02\0\x01\x12\x03\x03\x0b\x11\n\x0c\
+    \x05\x04\0\x02\0\x01\x12\x03\x03\x0b\x11\n\x0c\n\x05\x04\0\x02\0\x03\x12\
-    \n\x05\x04\0\x02\0\x03\x12\x03\x03\x14\x15\n\x0b\n\x04\x04\0\x02\x01\x12\
+    \x03\x03\x14\x15\n\x0b\n\x04\x04\0\x02\x01\x12\x03\x04\x04\x16\n\x0c\n\
-    \x03\x04\x04\x16\n\x0c\n\x05\x04\0\x02\x01\x06\x12\x03\x04\x04\x0e\n\x0c\
+    \x05\x04\0\x02\x01\x06\x12\x03\x04\x04\x0e\n\x0c\n\x05\x04\0\x02\x01\x01\
-    \n\x05\x04\0\x02\x01\x01\x12\x03\x04\x0f\x11\n\x0c\n\x05\x04\0\x02\x01\
+    \x12\x03\x04\x0f\x11\n\x0c\n\x05\x04\0\x02\x01\x03\x12\x03\x04\x14\x15\n\
-    \x03\x12\x03\x04\x14\x15\n\x0b\n\x04\x04\0\x02\x02\x12\x03\x05\x04\x13\n\
+    \x0b\n\x04\x04\0\x02\x02\x12\x03\x05\x04\x13\n\x0c\n\x05\x04\0\x02\x02\
-    \x0c\n\x05\x04\0\x02\x02\x05\x12\x03\x05\x04\t\n\x0c\n\x05\x04\0\x02\x02\
+    \x05\x12\x03\x05\x04\t\n\x0c\n\x05\x04\0\x02\x02\x01\x12\x03\x05\n\x0e\n\
-    \x01\x12\x03\x05\n\x0e\n\x0c\n\x05\x04\0\x02\x02\x03\x12\x03\x05\x11\x12\
+    \x0c\n\x05\x04\0\x02\x02\x03\x12\x03\x05\x11\x12\n\n\n\x02\x05\0\x12\x04\
-    \n\n\n\x02\x05\0\x12\x04\x07\0\r\x01\n\n\n\x03\x05\0\x01\x12\x03\x07\x05\
+    \x07\0\x0c\x01\n\n\n\x03\x05\0\x01\x12\x03\x07\x05\x0f\n\x0b\n\x04\x05\0\
-    \x0f\n\x0b\n\x04\x05\0\x02\0\x12\x03\x08\x04\x0e\n\x0c\n\x05\x05\0\x02\0\
+    \x02\0\x12\x03\x08\x04\x0e\n\x0c\n\x05\x05\0\x02\0\x01\x12\x03\x08\x04\t\
-    \x01\x12\x03\x08\x04\t\n\x0c\n\x05\x05\0\x02\0\x02\x12\x03\x08\x0c\r\n\
+    \n\x0c\n\x05\x05\0\x02\0\x02\x12\x03\x08\x0c\r\n\x0b\n\x04\x05\0\x02\x01\
-    \x0b\n\x04\x05\0\x02\x01\x12\x03\t\x04\x10\n\x0c\n\x05\x05\0\x02\x01\x01\
+    \x12\x03\t\x04\x10\n\x0c\n\x05\x05\0\x02\x01\x01\x12\x03\t\x04\x0b\n\x0c\
-    \x12\x03\t\x04\x0b\n\x0c\n\x05\x05\0\x02\x01\x02\x12\x03\t\x0e\x0f\n\x0b\
+    \n\x05\x05\0\x02\x01\x02\x12\x03\t\x0e\x0f\n\x0b\n\x04\x05\0\x02\x02\x12\
-    \n\x04\x05\0\x02\x02\x12\x03\n\x04\x10\n\x0c\n\x05\x05\0\x02\x02\x01\x12\
+    \x03\n\x04\x10\n\x0c\n\x05\x05\0\x02\x02\x01\x12\x03\n\x04\x0b\n\x0c\n\
-    \x03\n\x04\x0b\n\x0c\n\x05\x05\0\x02\x02\x02\x12\x03\n\x0e\x0f\n\x0b\n\
+    \x05\x05\0\x02\x02\x02\x12\x03\n\x0e\x0f\n\x0b\n\x04\x05\0\x02\x03\x12\
-    \x04\x05\0\x02\x03\x12\x03\x0b\x04\x11\n\x0c\n\x05\x05\0\x02\x03\x01\x12\
+    \x03\x0b\x04\x11\n\x0c\n\x05\x05\0\x02\x03\x01\x12\x03\x0b\x04\x0c\n\x0c\
-    \x03\x0b\x04\x0c\n\x0c\n\x05\x05\0\x02\x03\x02\x12\x03\x0b\x0f\x10\n\x0b\
+    \n\x05\x05\0\x02\x03\x02\x12\x03\x0b\x0f\x10b\x06proto3\
-    \n\x04\x05\0\x02\x04\x12\x03\x0c\x04\x13\n\x0c\n\x05\x05\0\x02\x04\x01\
-    \x12\x03\x0c\x04\x0e\n\x0c\n\x05\x05\0\x02\x04\x02\x12\x03\x0c\x11\x12b\
-    \x06proto3\
 ";
 
 static file_descriptor_proto_lazy: ::protobuf::rt::LazyV2<::protobuf::descriptor::FileDescriptorProto> = ::protobuf::rt::LazyV2::INIT;

shared-lib/flowy-collaboration/src/protobuf/proto/ws.proto

@@ -10,5 +10,4 @@ enum WsDataType {
     PushRev = 1;
     PullRev = 2;
     Conflict = 3;
-    NewDocUser = 4;
 }

shared-lib/lib-ot/src/revision/cache.rs

@@ -1,140 +0,0 @@
-use crate::{
-    errors::OTError,
-    revision::{Revision, RevisionRange},
-};
-use dashmap::DashMap;
-use std::{collections::VecDeque, fmt::Debug, sync::Arc};
-use tokio::sync::{broadcast, RwLock};
-
-pub trait RevisionDiskCache: Sync + Send {
-    type Error: Debug;
-    fn create_revisions(&self, revisions: Vec<RevisionRecord>) -> Result<(), Self::Error>;
-    fn revisions_in_range(&self, doc_id: &str, range: &RevisionRange) -> Result<Vec<Revision>, Self::Error>;
-    fn read_revision(&self, doc_id: &str, rev_id: i64) -> Result<Option<Revision>, Self::Error>;
-    fn read_revisions(&self, doc_id: &str) -> Result<Vec<Revision>, Self::Error>;
-}
-
-pub struct RevisionMemoryCache {
-    revs_map: Arc<DashMap<i64, RevisionRecord>>,
-    pending_revs: Arc<RwLock<VecDeque<i64>>>,
-}
-
-impl std::default::Default for RevisionMemoryCache {
-    fn default() -> Self {
-        let pending_revs = Arc::new(RwLock::new(VecDeque::new()));
-        RevisionMemoryCache {
-            revs_map: Arc::new(DashMap::new()),
-            pending_revs,
-        }
-    }
-}
-
-impl RevisionMemoryCache {
-    pub fn new() -> Self { RevisionMemoryCache::default() }
-
-    pub async fn add_revision(&self, revision: Revision) -> Result<(), OTError> {
-        // The last revision's rev_id must be greater than the new one.
-        if let Some(rev_id) = self.pending_revs.read().await.back() {
-            if *rev_id >= revision.rev_id {
-                return Err(OTError::revision_id_conflict()
-                    .context(format!("The new revision's id must be greater than {}", rev_id)));
-            }
-        }
-
-        self.pending_revs.write().await.push_back(revision.rev_id);
-        self.revs_map.insert(revision.rev_id, RevisionRecord::new(revision));
-        Ok(())
-    }
-
-    pub fn remove_revisions(&self, ids: Vec<i64>) { self.revs_map.retain(|k, _| !ids.contains(k)); }
-
-    pub async fn ack_revision(&self, rev_id: &i64) {
-        if let Some(mut m_revision) = self.revs_map.get_mut(rev_id) {
-            m_revision.value_mut().ack();
-            match self.pending_revs.write().await.pop_front() {
-                None => log::error!("The pending_revs should not be empty"),
-                Some(cache_rev_id) => {
-                    assert_eq!(&cache_rev_id, rev_id);
-                },
-            }
-        } else {
-            log::error!("Can't find revision with id {}", rev_id);
-        }
-    }
-
-    pub async fn revisions_in_range(&self, range: &RevisionRange) -> Result<Vec<Revision>, OTError> {
-        let revs = range
-            .iter()
-            .flat_map(|rev_id| match self.revs_map.get(&rev_id) {
-                None => None,
-                Some(rev) => Some(rev.revision.clone()),
-            })
-            .collect::<Vec<Revision>>();
-
-        if revs.len() == range.len() as usize {
-            Ok(revs)
-        } else {
-            Ok(vec![])
-        }
-    }
-
-    pub fn contains(&self, rev_id: &i64) -> bool { self.revs_map.contains_key(rev_id) }
-
-    pub fn is_empty(&self) -> bool { self.revs_map.is_empty() }
-
-    pub fn revisions(&self) -> (Vec<i64>, Vec<RevisionRecord>) {
-        let mut records: Vec<RevisionRecord> = vec![];
-        let mut ids: Vec<i64> = vec![];
-
-        self.revs_map.iter().for_each(|kv| {
-            records.push(kv.value().clone());
-            ids.push(*kv.key());
-        });
-        (ids, records)
-    }
-
-    pub async fn query_revision(&self, rev_id: &i64) -> Option<RevisionRecord> {
-        self.revs_map.get(&rev_id).map(|r| r.value().clone())
-    }
-
-    pub async fn front_revision(&self) -> Option<(i64, RevisionRecord)> {
-        match self.pending_revs.read().await.front() {
-            None => None,
-            Some(rev_id) => self.revs_map.get(rev_id).map(|r| (*r.key(), r.value().clone())),
-        }
-    }
-
-    pub async fn front_rev_id(&self) -> Option<i64> { self.pending_revs.read().await.front().copied() }
-}
-
-pub type RevIdReceiver = broadcast::Receiver<i64>;
-pub type RevIdSender = broadcast::Sender<i64>;
-
-#[derive(Debug, Clone, Eq, PartialEq)]
-pub enum RevState {
-    Local = 0,
-    Acked = 1,
-}
-
-#[derive(Clone)]
-pub struct RevisionRecord {
-    pub revision: Revision,
-    pub state: RevState,
-}
-
-impl RevisionRecord {
-    pub fn new(revision: Revision) -> Self {
-        Self {
-            revision,
-            state: RevState::Local,
-        }
-    }
-
-    pub fn ack(&mut self) { self.state = RevState::Acked; }
-}
-
-#[cfg(feature = "flowy_unit_test")]
-impl RevisionMemoryCache {
-    pub fn revs_map(&self) -> Arc<DashMap<i64, RevisionRecord>> { self.revs_map.clone() }
-    pub fn pending_revs(&self) -> Arc<RwLock<VecDeque<i64>>> { self.pending_revs.clone() }
-}

shared-lib/lib-ot/src/revision/mod.rs

@@ -1,5 +1,3 @@
-mod cache;
 mod model;
 
-pub use cache::*;
 pub use model::*;

shared-lib/lib-ot/src/revision/model.rs

@@ -31,6 +31,8 @@ impl Revision {
 
     pub fn pair_rev_id(&self) -> (i64, i64) { (self.base_rev_id, self.rev_id) }
 
+    pub fn is_initial(&self) -> bool { self.rev_id == 0 }
+
     // pub fn from_pb(pb: &mut crate::protobuf::Revision) -> Self {
     // pb.try_into().unwrap() }
 
@@ -155,3 +157,9 @@ pub fn md5<T: AsRef<[u8]>>(data: T) -> String {
     let md5 = format!("{:x}", md5::compute(data));
     md5
 }
+
+#[derive(Debug, Clone, Eq, PartialEq)]
+pub enum RevState {
+    Local = 0,
+    Acked = 1,
+}