@startuml
left to right direction

entity "af_roles" as roles {
  id : SERIAL (PK)
  name : TEXT
}

entity "af_permissions" as permissions {
  id : SERIAL (PK)
  name : VARCHAR(255)
  access_level : INTEGER
  description : TEXT
}

entity "af_role_permissions" as role_permissions {
  role_id : INT (FK af_roles.id)
  permission_id : INT (FK af_permissions.id)
  --
  (role_id, permission_id) : PK
}

entity "af_user" as user {
  uuid : UUID (PK)
  email : TEXT
  uid : BIGSERIAL
  name : TEXT
  created_at : TIMESTAMP WITH TIME ZONE
}

entity "af_workspace" as workspace {
  workspace_id : UUID (PK)
  database_storage_id : UUID
  owner_uid : BIGINT (FK af_user.uid)
  created_at : TIMESTAMP WITH TIME ZONE
  workspace_type : INTEGER
  workspace_name : TEXT
}

entity "af_workspace_member" as workspace_member {
  uid : BIGINT
  role_id : INT (FK af_roles.id)
  workspace_id : UUID (FK af_workspace.workspace_id)
  created_at : TIMESTAMP WITH TIME ZONE
  updated_at : TIMESTAMP WITH TIME ZONE
  --
  (uid, workspace_id) : PK
}

entity "af_collab" as collab {
  oid : TEXT (PK)
  owner_uid : BIGINT
  workspace_id : UUID (FK af_workspace.workspace_id)
  access_level : INTEGER
  created_at : TIMESTAMP WITH TIME ZONE
}

entity "af_collab_update" as collab_update {
  oid : TEXT (FK af_collab.oid)
  key : BIGSERIAL
  value : BYTEA
  value_size : INTEGER
  partition_key : INTEGER
  uid : BIGINT
  md5 : TEXT
  created_at : TIMESTAMP WITH TIME ZONE
  workspace_id : UUID (FK af_workspace.workspace_id)
  --
  (oid, key, partition_key) : PK
}


entity "af_collab_update_document" as af_collab_update_document {
  Inherits af_collab_update (partition_key = 0)
}

entity "af_collab_update_database" as af_collab_update_database {
  Inherits af_collab_update (partition_key = 1)
}

entity "af_collab_update_w_database" as af_collab_update_w_database {
  Inherits af_collab_update (partition_key = 2)
}

entity "af_collab_update_folder" as af_collab_update_folder {
  Inherits af_collab_update (partition_key = 3)
}

af_collab_update_document -u-|> collab_update
af_collab_update_database -u-|> collab_update
af_collab_update_w_database -u-|> collab_update
af_collab_update_folder -u-|> collab_update

entity "af_database_row_update" as database_row_update {
  oid : TEXT
  key : BIGSERIAL
  value : BYTEA
  value_size : INTEGER
  partition_key : INTEGER
  uid : BIGINT
  md5 : TEXT
  workspace_id : UUID (FK af_workspace.workspace_id)
  --
  (oid, key) : PK
}

entity "af_collab_member" as collab_member {
  uid : BIGINT (FK af_user.uid)
  oid : TEXT (FK af_collab.oid)
  role_id : INTEGER (FK af_roles.id)
  --
  (uid, oid) : PK
}

entity "af_collab_statistics" as collab_statistics {
  oid : TEXT (PK)
  edit_count : BIGINT
}

entity "af_collab_snapshot" as collab_snapshot {
  sid : BIGSERIAL (PK)
  oid : TEXT (FK af_collab.oid)
  name : TEXT
  blob : BYTEA
  blob_size : INTEGER
  edit_count : BIGINT
  created_at : TIMESTAMP WITH TIME ZONE
}


roles <-- role_permissions : FK
permissions <-u- role_permissions : FK
user <-- collab : FK
user <-- workspace : FK
user <-- collab_member : FK
roles <-- workspace_member : FK
workspace <-- workspace_member : FK
workspace <-- collab : FK
workspace <-- database_row_update : FK
collab <-- collab_update : FK
collab <-- collab_snapshot: FK
collab <-u- collab_member : FK
collab <-- collab_statistics : PK
roles <-- collab_member : FK


@enduml

@startuml
title Triggers in Database Schema

participant "af_user" as A
participant "af_workspace" as B
participant "af_workspace_member" as C
participant "af_collab" as D
participant "af_collab_update" as E
participant "af_collab_member" as F
participant "af_collab_statistics" as G
participant "af_collab_snapshot" as H

A -> B: create_af_workspace_trigger
note right
This trigger fires after an insert on af_user. It automatically creates a workspace
with the uid of the new user as the owner_uid.
end note

B -> C: manage_af_workspace_member_role_trigger
note right
This trigger fires after an insert on af_workspace. It automatically
creates a workspace member in the af_workspace_member table with the
role 'Owner'.
end note

E -> D: insert_into_af_collab_trigger
note right
This trigger fires before an insert on af_collab_update.
It checks if a corresponding collab exists in the af_collab table.
If not, it creates one with the oid, uid, and current timestamp.
end note

D -> F: insert_into_af_collab_member_trigger
note right
This trigger fires after an insert on af_collab.
It automatically adds the collab's owner to the af_collab_member
table with the role 'Owner'.
end note

E -> G: af_collab_update_edit_count_trigger
note right
 This trigger fires after an insert on af_collab_update.
 It increments the edit_count of the corresponding collab in
 the af_collab_statistics table.
end note

H -> G: af_collab_snapshot_update_edit_count_trigger
note right
 This trigger fires after an insert on af_collab_snapshot.
 It sets the edit_count of the new snapshot to the current
 edit_count of the collab in the af_collab_statistics table.
end note

@enduml