compose delta from remote and sync with client

app_flowy/lib/welcome/infrastructure/i_splash_impl.dart

@@ -18,7 +18,7 @@ export 'package:app_flowy/welcome/domain/i_splash.dart';
 class SplashUserImpl implements ISplashUser {
   @override
   Future<AuthState> currentUserProfile() {
-    final result = UserEventInitUser().send();
+    final result = UserEventCheckUser().send();
     return result.then((result) {
       return result.fold(
         (userProfile) {

app_flowy/lib/workspace/application/menu/menu_user_bloc.dart

@@ -1,4 +1,5 @@
 import 'package:app_flowy/workspace/domain/i_user.dart';
+import 'package:flowy_log/flowy_log.dart';
 import 'package:flowy_sdk/protobuf/flowy-user/user_profile.pb.dart';
 import 'package:flowy_sdk/protobuf/flowy-workspace/errors.pb.dart';
 import 'package:flowy_sdk/protobuf/flowy-workspace/workspace_create.pb.dart';
@@ -22,6 +23,8 @@ class MenuUserBloc extends Bloc<MenuUserEvent, MenuUserState> {
         watch.setProfileCallback(_profileUpdated);
         watch.setWorkspacesCallback(_workspacesUpdated);
         watch.startWatching();
+
+        await _initUser();
       },
       fetchWorkspaces: (_FetchWorkspaces value) async* {},
     );
@@ -33,6 +36,11 @@ class MenuUserBloc extends Bloc<MenuUserEvent, MenuUserState> {
     super.close();
   }
 
+  Future<void> _initUser() async {
+    final result = await iUserImpl.initUser();
+    result.fold((l) => null, (error) => Log.error(error));
+  }
+
   void _profileUpdated(Either<UserProfile, UserError> userOrFailed) {}
   void _workspacesUpdated(
       Either<List<Workspace>, WorkspaceError> workspacesOrFailed) {

app_flowy/lib/workspace/domain/i_user.dart

@@ -14,6 +14,7 @@ abstract class IUser {
   Future<Either<List<Workspace>, WorkspaceError>> fetchWorkspaces();
   Future<Either<Unit, WorkspaceError>> deleteWorkspace(String workspaceId);
   Future<Either<Unit, UserError>> signOut();
+  Future<Either<Unit, UserError>> initUser();
 }
 
 typedef UserProfileUpdateCallback = void Function(

app_flowy/lib/workspace/infrastructure/i_user_impl.dart

@@ -42,6 +42,11 @@ class IUserImpl extends IUser {
   Future<Either<List<Workspace>, WorkspaceError>> fetchWorkspaces() {
     return repo.getWorkspaces();
   }
+
+  @override
+  Future<Either<Unit, UserError>> initUser() {
+    return repo.initUser();
+  }
 }
 
 class IUserWatchImpl extends IUserWatch {

app_flowy/lib/workspace/infrastructure/repos/user_repo.dart

@@ -28,6 +28,11 @@ class UserRepo {
     return UserEventSignOut().send();
   }
 
+  Future<Either<Unit, UserError>> initUser() {
+    final result = UserEventInitUser().send();
+    return result;
+  }
+
   Future<Either<List<Workspace>, WorkspaceError>> getWorkspaces() {
     final request = QueryWorkspaceRequest.create();
 

app_flowy/packages/flowy_sdk/lib/dispatch/code_gen.dart

@@ -274,12 +274,12 @@ class WorkspaceEventApplyDocDelta {
 class UserEventInitUser {
     UserEventInitUser();
 
-    Future<Either<UserProfile, UserError>> send() {
+    Future<Either<Unit, UserError>> send() {
      final request = FFIRequest.create()
         ..event = UserEvent.InitUser.toString();
 
      return Dispatch.asyncRequest(request).then((bytesResult) => bytesResult.fold(
-        (okBytes) => left(UserProfile.fromBuffer(okBytes)),
+        (bytes) => left(unit),
         (errBytes) => right(UserError.fromBuffer(errBytes)),
       ));
     }
@@ -364,3 +364,17 @@ class UserEventGetUserProfile {
     }
 }
 
+class UserEventCheckUser {
+    UserEventCheckUser();
+
+    Future<Either<UserProfile, UserError>> send() {
+     final request = FFIRequest.create()
+        ..event = UserEvent.CheckUser.toString();
+
+     return Dispatch.asyncRequest(request).then((bytesResult) => bytesResult.fold(
+        (okBytes) => left(UserProfile.fromBuffer(okBytes)),
+        (errBytes) => right(UserError.fromBuffer(errBytes)),
+      ));
+    }
+}
+

app_flowy/packages/flowy_sdk/lib/protobuf/flowy-document/doc.pb.dart

@@ -75,7 +75,7 @@ class Doc extends $pb.GeneratedMessage {
   static final $pb.BuilderInfo _i = $pb.BuilderInfo(const $core.bool.fromEnvironment('protobuf.omit_message_names') ? '' : 'Doc', createEmptyInstance: create)
     ..aOS(1, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'id')
     ..a<$core.List<$core.int>>(2, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'data', $pb.PbFieldType.OY)
-    ..aInt64(3, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'revision')
+    ..aInt64(3, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'revId')
     ..hasRequiredFields = false
   ;
 
@@ -83,7 +83,7 @@ class Doc extends $pb.GeneratedMessage {
   factory Doc({
     $core.String? id,
     $core.List<$core.int>? data,
-    $fixnum.Int64? revision,
+    $fixnum.Int64? revId,
   }) {
     final _result = create();
     if (id != null) {
@@ -92,8 +92,8 @@ class Doc extends $pb.GeneratedMessage {
     if (data != null) {
       _result.data = data;
     }
-    if (revision != null) {
-      _result.revision = revision;
+    if (revId != null) {
+      _result.revId = revId;
     }
     return _result;
   }
@@ -137,19 +137,20 @@ class Doc extends $pb.GeneratedMessage {
   void clearData() => clearField(2);
 
   @$pb.TagNumber(3)
-  $fixnum.Int64 get revision => $_getI64(2);
+  $fixnum.Int64 get revId => $_getI64(2);
   @$pb.TagNumber(3)
-  set revision($fixnum.Int64 v) { $_setInt64(2, v); }
+  set revId($fixnum.Int64 v) { $_setInt64(2, v); }
   @$pb.TagNumber(3)
-  $core.bool hasRevision() => $_has(2);
+  $core.bool hasRevId() => $_has(2);
   @$pb.TagNumber(3)
-  void clearRevision() => clearField(3);
+  void clearRevId() => clearField(3);
 }
 
 class UpdateDocParams extends $pb.GeneratedMessage {
   static final $pb.BuilderInfo _i = $pb.BuilderInfo(const $core.bool.fromEnvironment('protobuf.omit_message_names') ? '' : 'UpdateDocParams', createEmptyInstance: create)
     ..aOS(1, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'docId')
     ..a<$core.List<$core.int>>(2, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'data', $pb.PbFieldType.OY)
+    ..aInt64(3, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'revId')
     ..hasRequiredFields = false
   ;
 
@@ -157,6 +158,7 @@ class UpdateDocParams extends $pb.GeneratedMessage {
   factory UpdateDocParams({
     $core.String? docId,
     $core.List<$core.int>? data,
+    $fixnum.Int64? revId,
   }) {
     final _result = create();
     if (docId != null) {
@@ -165,6 +167,9 @@ class UpdateDocParams extends $pb.GeneratedMessage {
     if (data != null) {
       _result.data = data;
     }
+    if (revId != null) {
+      _result.revId = revId;
+    }
     return _result;
   }
   factory UpdateDocParams.fromBuffer($core.List<$core.int> i, [$pb.ExtensionRegistry r = $pb.ExtensionRegistry.EMPTY]) => create()..mergeFromBuffer(i, r);
@@ -205,6 +210,15 @@ class UpdateDocParams extends $pb.GeneratedMessage {
   $core.bool hasData() => $_has(1);
   @$pb.TagNumber(2)
   void clearData() => clearField(2);
+
+  @$pb.TagNumber(3)
+  $fixnum.Int64 get revId => $_getI64(2);
+  @$pb.TagNumber(3)
+  set revId($fixnum.Int64 v) { $_setInt64(2, v); }
+  @$pb.TagNumber(3)
+  $core.bool hasRevId() => $_has(2);
+  @$pb.TagNumber(3)
+  void clearRevId() => clearField(3);
 }
 
 class DocDelta extends $pb.GeneratedMessage {

app_flowy/packages/flowy_sdk/lib/protobuf/flowy-document/doc.pbjson.dart

@@ -25,23 +25,24 @@ const Doc$json = const {
   '2': const [
     const {'1': 'id', '3': 1, '4': 1, '5': 9, '10': 'id'},
     const {'1': 'data', '3': 2, '4': 1, '5': 12, '10': 'data'},
-    const {'1': 'revision', '3': 3, '4': 1, '5': 3, '10': 'revision'},
+    const {'1': 'rev_id', '3': 3, '4': 1, '5': 3, '10': 'revId'},
   ],
 };
 
 /// Descriptor for `Doc`. Decode as a `google.protobuf.DescriptorProto`.
-final $typed_data.Uint8List docDescriptor = $convert.base64Decode('CgNEb2MSDgoCaWQYASABKAlSAmlkEhIKBGRhdGEYAiABKAxSBGRhdGESGgoIcmV2aXNpb24YAyABKANSCHJldmlzaW9u');
+final $typed_data.Uint8List docDescriptor = $convert.base64Decode('CgNEb2MSDgoCaWQYASABKAlSAmlkEhIKBGRhdGEYAiABKAxSBGRhdGESFQoGcmV2X2lkGAMgASgDUgVyZXZJZA==');
 @$core.Deprecated('Use updateDocParamsDescriptor instead')
 const UpdateDocParams$json = const {
   '1': 'UpdateDocParams',
   '2': const [
     const {'1': 'doc_id', '3': 1, '4': 1, '5': 9, '10': 'docId'},
     const {'1': 'data', '3': 2, '4': 1, '5': 12, '10': 'data'},
+    const {'1': 'rev_id', '3': 3, '4': 1, '5': 3, '10': 'revId'},
   ],
 };
 
 /// Descriptor for `UpdateDocParams`. Decode as a `google.protobuf.DescriptorProto`.
-final $typed_data.Uint8List updateDocParamsDescriptor = $convert.base64Decode('Cg9VcGRhdGVEb2NQYXJhbXMSFQoGZG9jX2lkGAEgASgJUgVkb2NJZBISCgRkYXRhGAIgASgMUgRkYXRh');
+final $typed_data.Uint8List updateDocParamsDescriptor = $convert.base64Decode('Cg9VcGRhdGVEb2NQYXJhbXMSFQoGZG9jX2lkGAEgASgJUgVkb2NJZBISCgRkYXRhGAIgASgMUgRkYXRhEhUKBnJldl9pZBgDIAEoA1IFcmV2SWQ=');
 @$core.Deprecated('Use docDeltaDescriptor instead')
 const DocDelta$json = const {
   '1': 'DocDelta',

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

@@ -11,11 +11,11 @@ import 'package:protobuf/protobuf.dart' as $pb;
 
 class WsDataType extends $pb.ProtobufEnum {
   static const WsDataType Acked = WsDataType._(0, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'Acked');
-  static const WsDataType Delta = WsDataType._(1, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'Delta');
+  static const WsDataType Rev = WsDataType._(1, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'Rev');
 
   static const $core.List<WsDataType> values = <WsDataType> [
     Acked,
-    Delta,
+    Rev,
   ];
 
   static final $core.Map<$core.int, WsDataType> _byValue = $pb.ProtobufEnum.initByValue(values);

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

@@ -13,12 +13,12 @@ const WsDataType$json = const {
   '1': 'WsDataType',
   '2': const [
     const {'1': 'Acked', '2': 0},
-    const {'1': 'Delta', '2': 1},
+    const {'1': 'Rev', '2': 1},
   ],
 };
 
 /// Descriptor for `WsDataType`. Decode as a `google.protobuf.EnumDescriptorProto`.
-final $typed_data.Uint8List wsDataTypeDescriptor = $convert.base64Decode('CgpXc0RhdGFUeXBlEgkKBUFja2VkEAASCQoFRGVsdGEQAQ==');
+final $typed_data.Uint8List wsDataTypeDescriptor = $convert.base64Decode('CgpXc0RhdGFUeXBlEgkKBUFja2VkEAASBwoDUmV2EAE=');
 @$core.Deprecated('Use wsDocumentDataDescriptor instead')
 const WsDocumentData$json = const {
   '1': 'WsDocumentData',

app_flowy/packages/flowy_sdk/lib/protobuf/flowy-user/event.pbenum.dart

@@ -16,6 +16,7 @@ class UserEvent extends $pb.ProtobufEnum {
   static const UserEvent SignOut = UserEvent._(3, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'SignOut');
   static const UserEvent UpdateUser = UserEvent._(4, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'UpdateUser');
   static const UserEvent GetUserProfile = UserEvent._(5, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'GetUserProfile');
+  static const UserEvent CheckUser = UserEvent._(6, const $core.bool.fromEnvironment('protobuf.omit_enum_names') ? '' : 'CheckUser');
 
   static const $core.List<UserEvent> values = <UserEvent> [
     InitUser,
@@ -24,6 +25,7 @@ class UserEvent extends $pb.ProtobufEnum {
     SignOut,
     UpdateUser,
     GetUserProfile,
+    CheckUser,
   ];
 
   static final $core.Map<$core.int, UserEvent> _byValue = $pb.ProtobufEnum.initByValue(values);

app_flowy/packages/flowy_sdk/lib/protobuf/flowy-user/event.pbjson.dart

@@ -18,8 +18,9 @@ const UserEvent$json = const {
     const {'1': 'SignOut', '2': 3},
     const {'1': 'UpdateUser', '2': 4},
     const {'1': 'GetUserProfile', '2': 5},
+    const {'1': 'CheckUser', '2': 6},
   ],
 };
 
 /// Descriptor for `UserEvent`. Decode as a `google.protobuf.EnumDescriptorProto`.
-final $typed_data.Uint8List userEventDescriptor = $convert.base64Decode('CglVc2VyRXZlbnQSDAoISW5pdFVzZXIQABIKCgZTaWduSW4QARIKCgZTaWduVXAQAhILCgdTaWduT3V0EAMSDgoKVXBkYXRlVXNlchAEEhIKDkdldFVzZXJQcm9maWxlEAU=');
+final $typed_data.Uint8List userEventDescriptor = $convert.base64Decode('CglVc2VyRXZlbnQSDAoISW5pdFVzZXIQABIKCgZTaWduSW4QARIKCgZTaWduVXAQAhILCgdTaWduT3V0EAMSDgoKVXBkYXRlVXNlchAEEhIKDkdldFVzZXJQcm9maWxlEAUSDQoJQ2hlY2tVc2VyEAY=');

app_flowy/packages/flowy_sdk/lib/protobuf/flowy-workspace/view_update.pb.dart

@@ -319,67 +319,6 @@ class UpdateViewParams extends $pb.GeneratedMessage {
   void clearIsTrash() => clearField(5);
 }
 
-class SaveViewDataRequest extends $pb.GeneratedMessage {
-  static final $pb.BuilderInfo _i = $pb.BuilderInfo(const $core.bool.fromEnvironment('protobuf.omit_message_names') ? '' : 'SaveViewDataRequest', createEmptyInstance: create)
-    ..aOS(1, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'viewId')
-    ..a<$core.List<$core.int>>(2, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'data', $pb.PbFieldType.OY)
-    ..hasRequiredFields = false
-  ;
-
-  SaveViewDataRequest._() : super();
-  factory SaveViewDataRequest({
-    $core.String? viewId,
-    $core.List<$core.int>? data,
-  }) {
-    final _result = create();
-    if (viewId != null) {
-      _result.viewId = viewId;
-    }
-    if (data != null) {
-      _result.data = data;
-    }
-    return _result;
-  }
-  factory SaveViewDataRequest.fromBuffer($core.List<$core.int> i, [$pb.ExtensionRegistry r = $pb.ExtensionRegistry.EMPTY]) => create()..mergeFromBuffer(i, r);
-  factory SaveViewDataRequest.fromJson($core.String i, [$pb.ExtensionRegistry r = $pb.ExtensionRegistry.EMPTY]) => create()..mergeFromJson(i, r);
-  @$core.Deprecated(
-  'Using this can add significant overhead to your binary. '
-  'Use [GeneratedMessageGenericExtensions.deepCopy] instead. '
-  'Will be removed in next major version')
-  SaveViewDataRequest clone() => SaveViewDataRequest()..mergeFromMessage(this);
-  @$core.Deprecated(
-  'Using this can add significant overhead to your binary. '
-  'Use [GeneratedMessageGenericExtensions.rebuild] instead. '
-  'Will be removed in next major version')
-  SaveViewDataRequest copyWith(void Function(SaveViewDataRequest) updates) => super.copyWith((message) => updates(message as SaveViewDataRequest)) as SaveViewDataRequest; // ignore: deprecated_member_use
-  $pb.BuilderInfo get info_ => _i;
-  @$core.pragma('dart2js:noInline')
-  static SaveViewDataRequest create() => SaveViewDataRequest._();
-  SaveViewDataRequest createEmptyInstance() => create();
-  static $pb.PbList<SaveViewDataRequest> createRepeated() => $pb.PbList<SaveViewDataRequest>();
-  @$core.pragma('dart2js:noInline')
-  static SaveViewDataRequest getDefault() => _defaultInstance ??= $pb.GeneratedMessage.$_defaultFor<SaveViewDataRequest>(create);
-  static SaveViewDataRequest? _defaultInstance;
-
-  @$pb.TagNumber(1)
-  $core.String get viewId => $_getSZ(0);
-  @$pb.TagNumber(1)
-  set viewId($core.String v) { $_setString(0, v); }
-  @$pb.TagNumber(1)
-  $core.bool hasViewId() => $_has(0);
-  @$pb.TagNumber(1)
-  void clearViewId() => clearField(1);
-
-  @$pb.TagNumber(2)
-  $core.List<$core.int> get data => $_getN(1);
-  @$pb.TagNumber(2)
-  set data($core.List<$core.int> v) { $_setBytes(1, v); }
-  @$pb.TagNumber(2)
-  $core.bool hasData() => $_has(1);
-  @$pb.TagNumber(2)
-  void clearData() => clearField(2);
-}
-
 class ApplyChangesetRequest extends $pb.GeneratedMessage {
   static final $pb.BuilderInfo _i = $pb.BuilderInfo(const $core.bool.fromEnvironment('protobuf.omit_message_names') ? '' : 'ApplyChangesetRequest', createEmptyInstance: create)
     ..aOS(1, const $core.bool.fromEnvironment('protobuf.omit_field_names') ? '' : 'viewId')

app_flowy/packages/flowy_sdk/lib/protobuf/flowy-workspace/view_update.pbjson.dart

@@ -48,17 +48,6 @@ const UpdateViewParams$json = const {
 
 /// Descriptor for `UpdateViewParams`. Decode as a `google.protobuf.DescriptorProto`.
 final $typed_data.Uint8List updateViewParamsDescriptor = $convert.base64Decode('ChBVcGRhdGVWaWV3UGFyYW1zEhcKB3ZpZXdfaWQYASABKAlSBnZpZXdJZBIUCgRuYW1lGAIgASgJSABSBG5hbWUSFAoEZGVzYxgDIAEoCUgBUgRkZXNjEh4KCXRodW1ibmFpbBgEIAEoCUgCUgl0aHVtYm5haWwSGwoIaXNfdHJhc2gYBSABKAhIA1IHaXNUcmFzaEINCgtvbmVfb2ZfbmFtZUINCgtvbmVfb2ZfZGVzY0ISChBvbmVfb2ZfdGh1bWJuYWlsQhEKD29uZV9vZl9pc190cmFzaA==');
-@$core.Deprecated('Use saveViewDataRequestDescriptor instead')
-const SaveViewDataRequest$json = const {
-  '1': 'SaveViewDataRequest',
-  '2': const [
-    const {'1': 'view_id', '3': 1, '4': 1, '5': 9, '10': 'viewId'},
-    const {'1': 'data', '3': 2, '4': 1, '5': 12, '10': 'data'},
-  ],
-};
-
-/// Descriptor for `SaveViewDataRequest`. Decode as a `google.protobuf.DescriptorProto`.
-final $typed_data.Uint8List saveViewDataRequestDescriptor = $convert.base64Decode('ChNTYXZlVmlld0RhdGFSZXF1ZXN0EhcKB3ZpZXdfaWQYASABKAlSBnZpZXdJZBISCgRkYXRhGAIgASgMUgRkYXRh');
 @$core.Deprecated('Use applyChangesetRequestDescriptor instead')
 const ApplyChangesetRequest$json = const {
   '1': 'ApplyChangesetRequest',

backend/doc/database_setup.md

@@ -14,7 +14,7 @@ bfcdd6369e89   postgres   "docker-entrypoint.s…"   19 minutes ago   Up 19 minu
 
 4. run `make init_database`. It will create the database scheme on remote specified by DATABASE_URL. You can connect you database using 
 pgAdmin.
-
+   
 ![img_2.png](img_2.png)
 
 The information you enter must be the same as the `make init_postgres`. e.g.

backend/migrations/20210909115140_doc.sql

@@ -2,5 +2,6 @@
 CREATE TABLE IF NOT EXISTS doc_table(
     id uuid NOT NULL,
     PRIMARY KEY (id),
-    data bytea NOT NULL DEFAULT ''
+    data bytea NOT NULL DEFAULT '',
+    rev_id bigint NOT NULL DEFAULT 0
 );

backend/src/entities/doc.rs

@@ -6,6 +6,7 @@ pub(crate) const DOC_TABLE: &'static str = "doc_table";
 pub struct DocTable {
     pub(crate) id: uuid::Uuid,
     pub(crate) data: Vec<u8>,
+    pub(crate) rev_id: i64,
 }
 
 impl std::convert::Into<Doc> for DocTable {
@@ -13,6 +14,7 @@ impl std::convert::Into<Doc> for DocTable {
         let mut doc = Doc::new();
         doc.set_id(self.id.to_string());
         doc.set_data(self.data);
+        doc.set_rev_id(self.rev_id);
         doc
     }
 }

backend/src/service/doc/doc.rs

@@ -65,6 +65,7 @@ pub(crate) async fn update_doc(
 
     let (sql, args) = SqlBuilder::update(DOC_TABLE)
         .add_some_arg("data", data)
+        .add_arg("rev_id", params.rev_id)
         .and_where_eq("id", doc_id)
         .build()?;
 

backend/src/service/doc/edit_doc.rs

@@ -1,83 +0,0 @@
-use crate::service::{
-    doc::update_doc,
-    ws::{entities::Socket, WsClientData, WsMessageAdaptor},
-};
-use actix_web::web::Data;
-use byteorder::{BigEndian, ByteOrder, WriteBytesExt};
-use bytes::Bytes;
-use flowy_document::{
-    entities::ws::{WsDataType, WsDocumentData},
-    protobuf::{Doc, Revision, UpdateDocParams},
-    services::doc::Document,
-};
-use flowy_net::errors::{internal_error, ServerError};
-use flowy_ot::core::Delta;
-use flowy_ws::{protobuf::WsModule, WsMessage};
-use parking_lot::RwLock;
-use protobuf::Message;
-use sqlx::PgPool;
-use std::{convert::TryInto, sync::Arc, time::Duration};
-
-pub(crate) struct EditDoc {
-    doc_id: String,
-    document: Arc<RwLock<Document>>,
-    pg_pool: Data<PgPool>,
-}
-
-impl EditDoc {
-    pub(crate) fn new(doc: Doc, pg_pool: Data<PgPool>) -> Result<Self, ServerError> {
-        let delta = Delta::from_bytes(doc.data).map_err(internal_error)?;
-        let document = Arc::new(RwLock::new(Document::from_delta(delta)));
-        Ok(Self {
-            doc_id: doc.id.clone(),
-            document,
-            pg_pool,
-        })
-    }
-
-    #[tracing::instrument(level = "debug", skip(self, socket, revision))]
-    pub(crate) async fn apply_revision(
-        &self,
-        socket: Socket,
-        revision: Revision,
-    ) -> Result<(), ServerError> {
-        let delta = Delta::from_bytes(revision.delta).map_err(internal_error)?;
-        match self.document.try_write_for(Duration::from_millis(300)) {
-            None => {
-                log::error!("Failed to acquire write lock of document");
-            },
-            Some(mut write_guard) => {
-                let _ = write_guard.apply_delta(delta).map_err(internal_error)?;
-                let mut wtr = vec![];
-                let _ = wtr.write_i64::<BigEndian>(revision.rev_id);
-
-                let data = WsDocumentData {
-                    id: self.doc_id.clone(),
-                    ty: WsDataType::Acked,
-                    data: wtr,
-                };
-
-                let msg: WsMessage = data.into();
-                let bytes: Bytes = msg.try_into().unwrap();
-                socket.do_send(WsMessageAdaptor(bytes));
-            },
-        }
-
-        let md5 = format!("{:x}", md5::compute(self.document.read().to_json()));
-        if md5 != revision.md5 {
-            log::warn!("Document md5 not match")
-        }
-
-        let mut params = UpdateDocParams::new();
-        params.set_doc_id(self.doc_id.clone());
-        params.set_data(self.document.read().to_bytes());
-        match update_doc(self.pg_pool.get_ref(), params).await {
-            Ok(_) => {},
-            Err(e) => {
-                log::error!("Save doc data failed: {:?}", e);
-            },
-        }
-
-        Ok(())
-    }
-}

backend/src/service/doc/edit_doc_context.rs

@@ -0,0 +1,163 @@
+use crate::service::{
+    doc::update_doc,
+    util::md5,
+    ws::{entities::Socket, WsMessageAdaptor},
+};
+use actix_web::web::Data;
+use byteorder::{BigEndian, ByteOrder, WriteBytesExt};
+use bytes::Bytes;
+use flowy_document::{
+    entities::ws::{WsDataType, WsDocumentData},
+    protobuf::{Doc, Revision, UpdateDocParams},
+    services::doc::Document,
+};
+use flowy_net::errors::{internal_error, ServerError};
+use flowy_ot::{
+    core::{Delta, OperationTransformable},
+    errors::OTError,
+};
+use flowy_ws::WsMessage;
+use parking_lot::RwLock;
+use protobuf::Message;
+use sqlx::PgPool;
+use std::{convert::TryInto, sync::Arc, time::Duration};
+
+pub(crate) struct EditDocContext {
+    doc_id: String,
+    rev_id: i64,
+    document: Arc<RwLock<Document>>,
+    pg_pool: Data<PgPool>,
+}
+
+impl EditDocContext {
+    pub(crate) fn new(doc: Doc, pg_pool: Data<PgPool>) -> Result<Self, ServerError> {
+        let delta = Delta::from_bytes(doc.data).map_err(internal_error)?;
+        let document = Arc::new(RwLock::new(Document::from_delta(delta)));
+        Ok(Self {
+            doc_id: doc.id.clone(),
+            rev_id: doc.rev_id,
+            document,
+            pg_pool,
+        })
+    }
+
+    #[tracing::instrument(level = "debug", skip(self, socket, revision))]
+    pub(crate) async fn apply_revision(
+        &self,
+        socket: Socket,
+        revision: Revision,
+    ) -> Result<(), ServerError> {
+        let _ = self.verify_md5(&revision)?;
+
+        if self.rev_id > revision.rev_id {
+            let (cli_prime, server_prime) = self.compose(revision.delta).map_err(internal_error)?;
+            let _ = self.update_document_delta(server_prime)?;
+
+            log::debug!("{} client delta: {}", self.doc_id, cli_prime.to_json());
+            let cli_revision = self.mk_revision(revision.rev_id, cli_prime);
+            let ws_cli_revision = mk_ws_rev_message(&self.doc_id, cli_revision);
+            socket.do_send(ws_cli_revision).map_err(internal_error)?;
+            Ok(())
+        } else {
+            let delta = Delta::from_bytes(revision.delta.clone()).map_err(internal_error)?;
+            let _ = self.update_document_delta(delta)?;
+            socket.do_send(mk_ws_acked_message(&revision));
+
+            // Opti: save with multiple revisions
+            let _ = self.save_doc_to_disk(&revision).await?;
+            Ok(())
+        }
+    }
+
+    fn mk_revision(&self, base_rev_id: i64, delta: Delta) -> Revision {
+        let delta_data = delta.into_bytes();
+        let md5 = md5(&delta_data);
+        let revision = Revision {
+            base_rev_id,
+            rev_id: self.rev_id,
+            delta: delta_data,
+            md5,
+            doc_id: self.doc_id.to_string(),
+            ..Default::default()
+        };
+        revision
+    }
+
+    #[tracing::instrument(level = "debug", skip(self, delta_data))]
+    fn compose(&self, delta_data: Vec<u8>) -> Result<(Delta, Delta), OTError> {
+        log::debug!(
+            "{} document data: {}",
+            self.doc_id,
+            self.document.read().to_json()
+        );
+        let doc_delta = self.document.read().delta().clone();
+        let cli_delta = Delta::from_bytes(delta_data)?;
+        let (a, b) = doc_delta.transform(&cli_delta)?;
+
+        Ok((a, b))
+    }
+
+    #[tracing::instrument(level = "debug", skip(self, delta))]
+    fn update_document_delta(&self, delta: Delta) -> Result<(), ServerError> {
+        // Opti: push each revision into queue and process it one by one.
+        match self.document.try_write_for(Duration::from_millis(300)) {
+            None => {
+                log::error!("Failed to acquire write lock of document");
+            },
+            Some(mut write_guard) => {
+                let _ = write_guard
+                    .apply_delta(delta.clone())
+                    .map_err(internal_error)?;
+
+                log::debug!("Document: {}", write_guard.to_plain_string());
+            },
+        }
+        Ok(())
+    }
+
+    fn verify_md5(&self, revision: &Revision) -> Result<(), ServerError> {
+        if md5(&revision.delta) != revision.md5 {
+            return Err(ServerError::internal().context("Delta md5 not match"));
+        }
+        Ok(())
+    }
+
+    async fn save_doc_to_disk(&self, revision: &Revision) -> Result<(), ServerError> {
+        let mut params = UpdateDocParams::new();
+        params.set_doc_id(self.doc_id.clone());
+        params.set_data(self.document.read().to_bytes());
+        params.set_rev_id(revision.rev_id);
+        let _ = update_doc(self.pg_pool.get_ref(), params).await?;
+
+        Ok(())
+    }
+}
+
+fn mk_ws_rev_message(doc_id: &str, revision: Revision) -> WsMessageAdaptor {
+    let bytes = revision.write_to_bytes().unwrap();
+
+    let data = WsDocumentData {
+        id: doc_id.to_string(),
+        ty: WsDataType::Rev,
+        data: bytes,
+    };
+
+    let msg: WsMessage = data.into();
+    let bytes: Bytes = msg.try_into().unwrap();
+    WsMessageAdaptor(bytes)
+}
+
+fn mk_ws_acked_message(revision: &Revision) -> WsMessageAdaptor {
+    let mut wtr = vec![];
+    let _ = wtr.write_i64::<BigEndian>(revision.rev_id);
+
+    let data = WsDocumentData {
+        id: revision.doc_id.clone(),
+        ty: WsDataType::Acked,
+        data: wtr,
+    };
+
+    let msg: WsMessage = data.into();
+    let bytes: Bytes = msg.try_into().unwrap();
+    WsMessageAdaptor(bytes)
+}

backend/src/service/doc/mod.rs

@@ -1,5 +1,5 @@
 mod doc;
-mod edit_doc;
+mod edit_doc_context;
 pub mod router;
 mod sql_builder;
 pub mod ws_handler;

backend/src/service/doc/sql_builder.rs

@@ -14,7 +14,11 @@ pub struct NewDocSqlBuilder {
 
 impl NewDocSqlBuilder {
     pub fn new(id: Uuid) -> Self {
-        let table = DocTable { id, data: vec![] };
+        let table = DocTable {
+            id,
+            data: vec![],
+            rev_id: 0,
+        };
         Self { table }
     }
 
@@ -27,6 +31,7 @@ impl NewDocSqlBuilder {
         let (sql, args) = SqlBuilder::create(DOC_TABLE)
             .add_arg("id", self.table.id)
             .add_arg("data", self.table.data)
+            .add_arg("rev_id", self.table.rev_id)
             .build()?;
 
         Ok((sql, args))

backend/src/service/doc/ws_handler.rs

@@ -1,17 +1,14 @@
-use super::edit_doc::EditDoc;
+use super::edit_doc_context::EditDocContext;
 use crate::service::{
     doc::read_doc,
     util::parse_from_bytes,
     ws::{WsBizHandler, WsClientData},
 };
 use actix_web::web::Data;
-use bytes::Bytes;
-use flowy_document::{
-    protobuf::{QueryDocParams, Revision, WsDataType, WsDocumentData},
-    services::doc::Document,
-};
+
+use flowy_document::protobuf::{QueryDocParams, Revision, WsDataType, WsDocumentData};
 use flowy_net::errors::ServerError;
-use parking_lot::{Mutex, RwLock, RwLockUpgradableReadGuard};
+use parking_lot::{RwLock, RwLockUpgradableReadGuard};
 use protobuf::Message;
 use sqlx::PgPool;
 use std::{collections::HashMap, sync::Arc};
@@ -43,7 +40,7 @@ impl WsBizHandler for DocWsBizHandler {
 
 struct EditDocManager {
     pg_pool: Data<PgPool>,
-    edit_docs: RwLock<HashMap<String, Arc<EditDoc>>>,
+    edit_docs: RwLock<HashMap<String, Arc<EditDocContext>>>,
 }
 
 impl EditDocManager {
@@ -59,7 +56,7 @@ impl EditDocManager {
 
         match document_data.ty {
             WsDataType::Acked => {},
-            WsDataType::Delta => {
+            WsDataType::Rev => {
                 let revision: Revision = parse_from_bytes(&document_data.data)?;
                 let edited_doc = self.get_edit_doc(&revision.doc_id).await?;
                 tokio::spawn(async move {
@@ -77,7 +74,7 @@ impl EditDocManager {
         Ok(())
     }
 
-    async fn get_edit_doc(&self, doc_id: &str) -> Result<Arc<EditDoc>, ServerError> {
+    async fn get_edit_doc(&self, doc_id: &str) -> Result<Arc<EditDocContext>, ServerError> {
         // Opti: using lock free map instead?
         let edit_docs = self.edit_docs.upgradable_read();
         if let Some(doc) = edit_docs.get(doc_id) {
@@ -91,7 +88,7 @@ impl EditDocManager {
             };
 
             let doc = read_doc(pg_pool.get_ref(), params).await?;
-            let edit_doc = Arc::new(EditDoc::new(doc, self.pg_pool.clone())?);
+            let edit_doc = Arc::new(EditDocContext::new(doc, self.pg_pool.clone())?);
             edit_docs.insert(doc_id.to_string(), edit_doc.clone());
             Ok(edit_doc)
         }

backend/src/service/util.rs

@@ -17,6 +17,12 @@ pub async fn parse_from_dev_payload<T: Message>(
     parse_from_bytes(&bytes)
 }
 
+#[inline]
+pub fn md5<T: AsRef<[u8]>>(data: T) -> String {
+    let md5 = format!("{:x}", md5::compute(data));
+    md5
+}
+
 pub fn parse_from_bytes<T: Message>(bytes: &[u8]) -> Result<T, ServerError> {
     let result: ProtobufResult<T> = Message::parse_from_bytes(&bytes);
     match result {

backend/src/service/ws/biz_handler.rs

@@ -1,5 +1,5 @@
 use crate::service::ws::WsClientData;
-use bytes::Bytes;
+
 use flowy_ws::WsModule;
 use std::{collections::HashMap, sync::Arc};
 

backend/src/service/ws/entities/message.rs

@@ -1,7 +1,5 @@
-use crate::service::ws::entities::SessionId;
 use actix::Message;
 use bytes::Bytes;
-use std::fmt::Formatter;
 
 #[derive(Debug, Message, Clone)]
 #[rtype(result = "()")]

rust-lib/flowy-database/migrations/2021-09-22-074638_flowy-doc-op/up.sql

@@ -1,7 +1,8 @@
 -- Your SQL goes here
 CREATE TABLE op_table (
+    doc_id TEXT NOT NULL PRIMARY KEY,
     base_rev_id BIGINT NOT NULL DEFAULT 0,
-    rev_id BIGINT NOT NULL PRIMARY KEY,
+    rev_id BIGINT NOT NULL DEFAULT 0,
     data BLOB NOT NULL DEFAULT (x''),
     md5 TEXT NOT NULL DEFAULT '',
     state INTEGER NOT NULL DEFAULT 0

rust-lib/flowy-database/src/schema.rs

@@ -22,7 +22,8 @@ table! {
 }
 
 table! {
-    op_table (rev_id) {
+    op_table (doc_id) {
+        doc_id -> Text,
         base_rev_id -> BigInt,
         rev_id -> BigInt,
         data -> Binary,

rust-lib/flowy-derive/src/derive_cache/derive_cache.rs

@@ -41,7 +41,6 @@ pub fn category_from_str(type_str: &str) -> TypeCategory {
         | "CurrentWorkspace"
         | "UpdateViewRequest"
         | "UpdateViewParams"
-        | "SaveViewDataRequest"
         | "ApplyChangesetRequest"
         | "DeleteViewRequest"
         | "DeleteViewParams"

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

@@ -22,7 +22,7 @@ pub struct Doc {
     pub data: Vec<u8>,
 
     #[pb(index = 3)]
-    pub revision: i64,
+    pub rev_id: i64,
 }
 
 #[derive(ProtoBuf, Default, Debug, Clone)]
@@ -32,6 +32,9 @@ pub struct UpdateDocParams {
 
     #[pb(index = 2)]
     pub data: Vec<u8>,
+
+    #[pb(index = 3)]
+    pub rev_id: i64,
 }
 
 #[derive(ProtoBuf, Default, Debug, Clone)]

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

@@ -7,7 +7,7 @@ use std::convert::TryInto;
 #[derive(Debug, Clone, ProtoBuf_Enum, Eq, PartialEq, Hash)]
 pub enum WsDataType {
     Acked = 0,
-    Delta = 1,
+    Rev   = 1,
 }
 
 impl std::default::Default for WsDataType {
@@ -33,7 +33,7 @@ impl std::convert::From<Revision> for WsDocumentData {
         let data = bytes.to_vec();
         Self {
             id,
-            ty: WsDataType::Delta,
+            ty: WsDataType::Rev,
             data,
         }
     }

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

@@ -43,10 +43,10 @@ impl FlowyDocument {
         Ok(open_doc.doc())
     }
 
-    pub async fn apply_doc_delta(&self, params: DocDelta, pool: Arc<ConnectionPool>) -> Result<Doc, DocError> {
+    pub async fn apply_doc_delta(&self, params: DocDelta) -> Result<Doc, DocError> {
         // workaround: compare the rust's delta with flutter's delta. Will be removed
         // very soon
-        let doc = self.doc_ctrl.edit_doc(params.clone(), pool)?;
+        let doc = self.doc_ctrl.edit_doc(params.clone())?;
         Ok(doc)
     }
 }

rust-lib/flowy-document/src/protobuf/model/doc.rs

@@ -229,7 +229,7 @@ pub struct Doc {
     // message fields
     pub id: ::std::string::String,
     pub data: ::std::vec::Vec<u8>,
-    pub revision: i64,
+    pub rev_id: i64,
     // special fields
     pub unknown_fields: ::protobuf::UnknownFields,
     pub cached_size: ::protobuf::CachedSize,
@@ -298,19 +298,19 @@ impl Doc {
         ::std::mem::replace(&mut self.data, ::std::vec::Vec::new())
     }
 
-    // int64 revision = 3;
+    // int64 rev_id = 3;
 
 
-    pub fn get_revision(&self) -> i64 {
-        self.revision
+    pub fn get_rev_id(&self) -> i64 {
+        self.rev_id
     }
-    pub fn clear_revision(&mut self) {
-        self.revision = 0;
+    pub fn clear_rev_id(&mut self) {
+        self.rev_id = 0;
     }
 
     // Param is passed by value, moved
-    pub fn set_revision(&mut self, v: i64) {
-        self.revision = v;
+    pub fn set_rev_id(&mut self, v: i64) {
+        self.rev_id = v;
     }
 }
 
@@ -334,7 +334,7 @@ impl ::protobuf::Message for Doc {
                         return ::std::result::Result::Err(::protobuf::rt::unexpected_wire_type(wire_type));
                     }
                     let tmp = is.read_int64()?;
-                    self.revision = tmp;
+                    self.rev_id = tmp;
                 },
                 _ => {
                     ::protobuf::rt::read_unknown_or_skip_group(field_number, wire_type, is, self.mut_unknown_fields())?;
@@ -354,8 +354,8 @@ impl ::protobuf::Message for Doc {
         if !self.data.is_empty() {
             my_size += ::protobuf::rt::bytes_size(2, &self.data);
         }
-        if self.revision != 0 {
-            my_size += ::protobuf::rt::value_size(3, self.revision, ::protobuf::wire_format::WireTypeVarint);
+        if self.rev_id != 0 {
+            my_size += ::protobuf::rt::value_size(3, self.rev_id, ::protobuf::wire_format::WireTypeVarint);
         }
         my_size += ::protobuf::rt::unknown_fields_size(self.get_unknown_fields());
         self.cached_size.set(my_size);
@@ -369,8 +369,8 @@ impl ::protobuf::Message for Doc {
         if !self.data.is_empty() {
             os.write_bytes(2, &self.data)?;
         }
-        if self.revision != 0 {
-            os.write_int64(3, self.revision)?;
+        if self.rev_id != 0 {
+            os.write_int64(3, self.rev_id)?;
         }
         os.write_unknown_fields(self.get_unknown_fields())?;
         ::std::result::Result::Ok(())
@@ -421,9 +421,9 @@ impl ::protobuf::Message for Doc {
                 |m: &mut Doc| { &mut m.data },
             ));
             fields.push(::protobuf::reflect::accessor::make_simple_field_accessor::<_, ::protobuf::types::ProtobufTypeInt64>(
-                "revision",
-                |m: &Doc| { &m.revision },
-                |m: &mut Doc| { &mut m.revision },
+                "rev_id",
+                |m: &Doc| { &m.rev_id },
+                |m: &mut Doc| { &mut m.rev_id },
             ));
             ::protobuf::reflect::MessageDescriptor::new_pb_name::<Doc>(
                 "Doc",
@@ -443,7 +443,7 @@ impl ::protobuf::Clear for Doc {
     fn clear(&mut self) {
         self.id.clear();
         self.data.clear();
-        self.revision = 0;
+        self.rev_id = 0;
         self.unknown_fields.clear();
     }
 }
@@ -465,6 +465,7 @@ pub struct UpdateDocParams {
     // message fields
     pub doc_id: ::std::string::String,
     pub data: ::std::vec::Vec<u8>,
+    pub rev_id: i64,
     // special fields
     pub unknown_fields: ::protobuf::UnknownFields,
     pub cached_size: ::protobuf::CachedSize,
@@ -532,6 +533,21 @@ impl UpdateDocParams {
     pub fn take_data(&mut self) -> ::std::vec::Vec<u8> {
         ::std::mem::replace(&mut self.data, ::std::vec::Vec::new())
     }
+
+    // int64 rev_id = 3;
+
+
+    pub fn get_rev_id(&self) -> i64 {
+        self.rev_id
+    }
+    pub fn clear_rev_id(&mut self) {
+        self.rev_id = 0;
+    }
+
+    // Param is passed by value, moved
+    pub fn set_rev_id(&mut self, v: i64) {
+        self.rev_id = v;
+    }
 }
 
 impl ::protobuf::Message for UpdateDocParams {
@@ -549,6 +565,13 @@ impl ::protobuf::Message for UpdateDocParams {
                 2 => {
                     ::protobuf::rt::read_singular_proto3_bytes_into(wire_type, is, &mut self.data)?;
                 },
+                3 => {
+                    if wire_type != ::protobuf::wire_format::WireTypeVarint {
+                        return ::std::result::Result::Err(::protobuf::rt::unexpected_wire_type(wire_type));
+                    }
+                    let tmp = is.read_int64()?;
+                    self.rev_id = tmp;
+                },
                 _ => {
                     ::protobuf::rt::read_unknown_or_skip_group(field_number, wire_type, is, self.mut_unknown_fields())?;
                 },
@@ -567,6 +590,9 @@ impl ::protobuf::Message for UpdateDocParams {
         if !self.data.is_empty() {
             my_size += ::protobuf::rt::bytes_size(2, &self.data);
         }
+        if self.rev_id != 0 {
+            my_size += ::protobuf::rt::value_size(3, self.rev_id, ::protobuf::wire_format::WireTypeVarint);
+        }
         my_size += ::protobuf::rt::unknown_fields_size(self.get_unknown_fields());
         self.cached_size.set(my_size);
         my_size
@@ -579,6 +605,9 @@ impl ::protobuf::Message for UpdateDocParams {
         if !self.data.is_empty() {
             os.write_bytes(2, &self.data)?;
         }
+        if self.rev_id != 0 {
+            os.write_int64(3, self.rev_id)?;
+        }
         os.write_unknown_fields(self.get_unknown_fields())?;
         ::std::result::Result::Ok(())
     }
@@ -627,6 +656,11 @@ impl ::protobuf::Message for UpdateDocParams {
                 |m: &UpdateDocParams| { &m.data },
                 |m: &mut UpdateDocParams| { &mut m.data },
             ));
+            fields.push(::protobuf::reflect::accessor::make_simple_field_accessor::<_, ::protobuf::types::ProtobufTypeInt64>(
+                "rev_id",
+                |m: &UpdateDocParams| { &m.rev_id },
+                |m: &mut UpdateDocParams| { &mut m.rev_id },
+            ));
             ::protobuf::reflect::MessageDescriptor::new_pb_name::<UpdateDocParams>(
                 "UpdateDocParams",
                 fields,
@@ -645,6 +679,7 @@ impl ::protobuf::Clear for UpdateDocParams {
     fn clear(&mut self) {
         self.doc_id.clear();
         self.data.clear();
+        self.rev_id = 0;
         self.unknown_fields.clear();
     }
 }
@@ -1023,48 +1058,51 @@ impl ::protobuf::reflect::ProtobufValue for QueryDocParams {
 
 static file_descriptor_proto_data: &'static [u8] = b"\
     \n\tdoc.proto\"5\n\x0fCreateDocParams\x12\x0e\n\x02id\x18\x01\x20\x01(\t\
-    R\x02id\x12\x12\n\x04data\x18\x02\x20\x01(\x0cR\x04data\"E\n\x03Doc\x12\
+    R\x02id\x12\x12\n\x04data\x18\x02\x20\x01(\x0cR\x04data\"@\n\x03Doc\x12\
     \x0e\n\x02id\x18\x01\x20\x01(\tR\x02id\x12\x12\n\x04data\x18\x02\x20\x01\
-    (\x0cR\x04data\x12\x1a\n\x08revision\x18\x03\x20\x01(\x03R\x08revision\"\
-    <\n\x0fUpdateDocParams\x12\x15\n\x06doc_id\x18\x01\x20\x01(\tR\x05docId\
-    \x12\x12\n\x04data\x18\x02\x20\x01(\x0cR\x04data\"5\n\x08DocDelta\x12\
-    \x15\n\x06doc_id\x18\x01\x20\x01(\tR\x05docId\x12\x12\n\x04data\x18\x02\
-    \x20\x01(\x0cR\x04data\"'\n\x0eQueryDocParams\x12\x15\n\x06doc_id\x18\
-    \x01\x20\x01(\tR\x05docIdJ\xb0\x05\n\x06\x12\x04\0\0\x15\x01\n\x08\n\x01\
-    \x0c\x12\x03\0\0\x12\n\n\n\x02\x04\0\x12\x04\x02\0\x05\x01\n\n\n\x03\x04\
-    \0\x01\x12\x03\x02\x08\x17\n\x0b\n\x04\x04\0\x02\0\x12\x03\x03\x04\x12\n\
-    \x0c\n\x05\x04\0\x02\0\x05\x12\x03\x03\x04\n\n\x0c\n\x05\x04\0\x02\0\x01\
-    \x12\x03\x03\x0b\r\n\x0c\n\x05\x04\0\x02\0\x03\x12\x03\x03\x10\x11\n\x0b\
-    \n\x04\x04\0\x02\x01\x12\x03\x04\x04\x13\n\x0c\n\x05\x04\0\x02\x01\x05\
-    \x12\x03\x04\x04\t\n\x0c\n\x05\x04\0\x02\x01\x01\x12\x03\x04\n\x0e\n\x0c\
-    \n\x05\x04\0\x02\x01\x03\x12\x03\x04\x11\x12\n\n\n\x02\x04\x01\x12\x04\
-    \x06\0\n\x01\n\n\n\x03\x04\x01\x01\x12\x03\x06\x08\x0b\n\x0b\n\x04\x04\
-    \x01\x02\0\x12\x03\x07\x04\x12\n\x0c\n\x05\x04\x01\x02\0\x05\x12\x03\x07\
-    \x04\n\n\x0c\n\x05\x04\x01\x02\0\x01\x12\x03\x07\x0b\r\n\x0c\n\x05\x04\
-    \x01\x02\0\x03\x12\x03\x07\x10\x11\n\x0b\n\x04\x04\x01\x02\x01\x12\x03\
-    \x08\x04\x13\n\x0c\n\x05\x04\x01\x02\x01\x05\x12\x03\x08\x04\t\n\x0c\n\
-    \x05\x04\x01\x02\x01\x01\x12\x03\x08\n\x0e\n\x0c\n\x05\x04\x01\x02\x01\
-    \x03\x12\x03\x08\x11\x12\n\x0b\n\x04\x04\x01\x02\x02\x12\x03\t\x04\x17\n\
-    \x0c\n\x05\x04\x01\x02\x02\x05\x12\x03\t\x04\t\n\x0c\n\x05\x04\x01\x02\
-    \x02\x01\x12\x03\t\n\x12\n\x0c\n\x05\x04\x01\x02\x02\x03\x12\x03\t\x15\
-    \x16\n\n\n\x02\x04\x02\x12\x04\x0b\0\x0e\x01\n\n\n\x03\x04\x02\x01\x12\
-    \x03\x0b\x08\x17\n\x0b\n\x04\x04\x02\x02\0\x12\x03\x0c\x04\x16\n\x0c\n\
-    \x05\x04\x02\x02\0\x05\x12\x03\x0c\x04\n\n\x0c\n\x05\x04\x02\x02\0\x01\
-    \x12\x03\x0c\x0b\x11\n\x0c\n\x05\x04\x02\x02\0\x03\x12\x03\x0c\x14\x15\n\
-    \x0b\n\x04\x04\x02\x02\x01\x12\x03\r\x04\x13\n\x0c\n\x05\x04\x02\x02\x01\
-    \x05\x12\x03\r\x04\t\n\x0c\n\x05\x04\x02\x02\x01\x01\x12\x03\r\n\x0e\n\
-    \x0c\n\x05\x04\x02\x02\x01\x03\x12\x03\r\x11\x12\n\n\n\x02\x04\x03\x12\
-    \x04\x0f\0\x12\x01\n\n\n\x03\x04\x03\x01\x12\x03\x0f\x08\x10\n\x0b\n\x04\
-    \x04\x03\x02\0\x12\x03\x10\x04\x16\n\x0c\n\x05\x04\x03\x02\0\x05\x12\x03\
-    \x10\x04\n\n\x0c\n\x05\x04\x03\x02\0\x01\x12\x03\x10\x0b\x11\n\x0c\n\x05\
-    \x04\x03\x02\0\x03\x12\x03\x10\x14\x15\n\x0b\n\x04\x04\x03\x02\x01\x12\
-    \x03\x11\x04\x13\n\x0c\n\x05\x04\x03\x02\x01\x05\x12\x03\x11\x04\t\n\x0c\
-    \n\x05\x04\x03\x02\x01\x01\x12\x03\x11\n\x0e\n\x0c\n\x05\x04\x03\x02\x01\
-    \x03\x12\x03\x11\x11\x12\n\n\n\x02\x04\x04\x12\x04\x13\0\x15\x01\n\n\n\
-    \x03\x04\x04\x01\x12\x03\x13\x08\x16\n\x0b\n\x04\x04\x04\x02\0\x12\x03\
-    \x14\x04\x16\n\x0c\n\x05\x04\x04\x02\0\x05\x12\x03\x14\x04\n\n\x0c\n\x05\
-    \x04\x04\x02\0\x01\x12\x03\x14\x0b\x11\n\x0c\n\x05\x04\x04\x02\0\x03\x12\
-    \x03\x14\x14\x15b\x06proto3\
+    (\x0cR\x04data\x12\x15\n\x06rev_id\x18\x03\x20\x01(\x03R\x05revId\"S\n\
+    \x0fUpdateDocParams\x12\x15\n\x06doc_id\x18\x01\x20\x01(\tR\x05docId\x12\
+    \x12\n\x04data\x18\x02\x20\x01(\x0cR\x04data\x12\x15\n\x06rev_id\x18\x03\
+    \x20\x01(\x03R\x05revId\"5\n\x08DocDelta\x12\x15\n\x06doc_id\x18\x01\x20\
+    \x01(\tR\x05docId\x12\x12\n\x04data\x18\x02\x20\x01(\x0cR\x04data\"'\n\
+    \x0eQueryDocParams\x12\x15\n\x06doc_id\x18\x01\x20\x01(\tR\x05docIdJ\xe7\
+    \x05\n\x06\x12\x04\0\0\x16\x01\n\x08\n\x01\x0c\x12\x03\0\0\x12\n\n\n\x02\
+    \x04\0\x12\x04\x02\0\x05\x01\n\n\n\x03\x04\0\x01\x12\x03\x02\x08\x17\n\
+    \x0b\n\x04\x04\0\x02\0\x12\x03\x03\x04\x12\n\x0c\n\x05\x04\0\x02\0\x05\
+    \x12\x03\x03\x04\n\n\x0c\n\x05\x04\0\x02\0\x01\x12\x03\x03\x0b\r\n\x0c\n\
+    \x05\x04\0\x02\0\x03\x12\x03\x03\x10\x11\n\x0b\n\x04\x04\0\x02\x01\x12\
+    \x03\x04\x04\x13\n\x0c\n\x05\x04\0\x02\x01\x05\x12\x03\x04\x04\t\n\x0c\n\
+    \x05\x04\0\x02\x01\x01\x12\x03\x04\n\x0e\n\x0c\n\x05\x04\0\x02\x01\x03\
+    \x12\x03\x04\x11\x12\n\n\n\x02\x04\x01\x12\x04\x06\0\n\x01\n\n\n\x03\x04\
+    \x01\x01\x12\x03\x06\x08\x0b\n\x0b\n\x04\x04\x01\x02\0\x12\x03\x07\x04\
+    \x12\n\x0c\n\x05\x04\x01\x02\0\x05\x12\x03\x07\x04\n\n\x0c\n\x05\x04\x01\
+    \x02\0\x01\x12\x03\x07\x0b\r\n\x0c\n\x05\x04\x01\x02\0\x03\x12\x03\x07\
+    \x10\x11\n\x0b\n\x04\x04\x01\x02\x01\x12\x03\x08\x04\x13\n\x0c\n\x05\x04\
+    \x01\x02\x01\x05\x12\x03\x08\x04\t\n\x0c\n\x05\x04\x01\x02\x01\x01\x12\
+    \x03\x08\n\x0e\n\x0c\n\x05\x04\x01\x02\x01\x03\x12\x03\x08\x11\x12\n\x0b\
+    \n\x04\x04\x01\x02\x02\x12\x03\t\x04\x15\n\x0c\n\x05\x04\x01\x02\x02\x05\
+    \x12\x03\t\x04\t\n\x0c\n\x05\x04\x01\x02\x02\x01\x12\x03\t\n\x10\n\x0c\n\
+    \x05\x04\x01\x02\x02\x03\x12\x03\t\x13\x14\n\n\n\x02\x04\x02\x12\x04\x0b\
+    \0\x0f\x01\n\n\n\x03\x04\x02\x01\x12\x03\x0b\x08\x17\n\x0b\n\x04\x04\x02\
+    \x02\0\x12\x03\x0c\x04\x16\n\x0c\n\x05\x04\x02\x02\0\x05\x12\x03\x0c\x04\
+    \n\n\x0c\n\x05\x04\x02\x02\0\x01\x12\x03\x0c\x0b\x11\n\x0c\n\x05\x04\x02\
+    \x02\0\x03\x12\x03\x0c\x14\x15\n\x0b\n\x04\x04\x02\x02\x01\x12\x03\r\x04\
+    \x13\n\x0c\n\x05\x04\x02\x02\x01\x05\x12\x03\r\x04\t\n\x0c\n\x05\x04\x02\
+    \x02\x01\x01\x12\x03\r\n\x0e\n\x0c\n\x05\x04\x02\x02\x01\x03\x12\x03\r\
+    \x11\x12\n\x0b\n\x04\x04\x02\x02\x02\x12\x03\x0e\x04\x15\n\x0c\n\x05\x04\
+    \x02\x02\x02\x05\x12\x03\x0e\x04\t\n\x0c\n\x05\x04\x02\x02\x02\x01\x12\
+    \x03\x0e\n\x10\n\x0c\n\x05\x04\x02\x02\x02\x03\x12\x03\x0e\x13\x14\n\n\n\
+    \x02\x04\x03\x12\x04\x10\0\x13\x01\n\n\n\x03\x04\x03\x01\x12\x03\x10\x08\
+    \x10\n\x0b\n\x04\x04\x03\x02\0\x12\x03\x11\x04\x16\n\x0c\n\x05\x04\x03\
+    \x02\0\x05\x12\x03\x11\x04\n\n\x0c\n\x05\x04\x03\x02\0\x01\x12\x03\x11\
+    \x0b\x11\n\x0c\n\x05\x04\x03\x02\0\x03\x12\x03\x11\x14\x15\n\x0b\n\x04\
+    \x04\x03\x02\x01\x12\x03\x12\x04\x13\n\x0c\n\x05\x04\x03\x02\x01\x05\x12\
+    \x03\x12\x04\t\n\x0c\n\x05\x04\x03\x02\x01\x01\x12\x03\x12\n\x0e\n\x0c\n\
+    \x05\x04\x03\x02\x01\x03\x12\x03\x12\x11\x12\n\n\n\x02\x04\x04\x12\x04\
+    \x14\0\x16\x01\n\n\n\x03\x04\x04\x01\x12\x03\x14\x08\x16\n\x0b\n\x04\x04\
+    \x04\x02\0\x12\x03\x15\x04\x16\n\x0c\n\x05\x04\x04\x02\0\x05\x12\x03\x15\
+    \x04\n\n\x0c\n\x05\x04\x04\x02\0\x01\x12\x03\x15\x0b\x11\n\x0c\n\x05\x04\
+    \x04\x02\0\x03\x12\x03\x15\x14\x15b\x06proto3\
 ";
 
 static file_descriptor_proto_lazy: ::protobuf::rt::LazyV2<::protobuf::descriptor::FileDescriptorProto> = ::protobuf::rt::LazyV2::INIT;

rust-lib/flowy-document/src/protobuf/model/ws.rs

@@ -258,7 +258,7 @@ impl ::protobuf::reflect::ProtobufValue for WsDocumentData {
 #[derive(Clone,PartialEq,Eq,Debug,Hash)]
 pub enum WsDataType {
     Acked = 0,
-    Delta = 1,
+    Rev = 1,
 }
 
 impl ::protobuf::ProtobufEnum for WsDataType {
@@ -269,7 +269,7 @@ impl ::protobuf::ProtobufEnum for WsDataType {
     fn from_i32(value: i32) -> ::std::option::Option<WsDataType> {
         match value {
             0 => ::std::option::Option::Some(WsDataType::Acked),
-            1 => ::std::option::Option::Some(WsDataType::Delta),
+            1 => ::std::option::Option::Some(WsDataType::Rev),
             _ => ::std::option::Option::None
         }
     }
@@ -277,7 +277,7 @@ impl ::protobuf::ProtobufEnum for WsDataType {
     fn values() -> &'static [Self] {
         static values: &'static [WsDataType] = &[
             WsDataType::Acked,
-            WsDataType::Delta,
+            WsDataType::Rev,
         ];
         values
     }
@@ -308,8 +308,8 @@ impl ::protobuf::reflect::ProtobufValue for WsDataType {
 static file_descriptor_proto_data: &'static [u8] = b"\
     \n\x08ws.proto\"Q\n\x0eWsDocumentData\x12\x0e\n\x02id\x18\x01\x20\x01(\t\
     R\x02id\x12\x1b\n\x02ty\x18\x02\x20\x01(\x0e2\x0b.WsDataTypeR\x02ty\x12\
-    \x12\n\x04data\x18\x03\x20\x01(\x0cR\x04data*\"\n\nWsDataType\x12\t\n\
-    \x05Acked\x10\0\x12\t\n\x05Delta\x10\x01J\xb9\x02\n\x06\x12\x04\0\0\n\
+    \x12\n\x04data\x18\x03\x20\x01(\x0cR\x04data*\x20\n\nWsDataType\x12\t\n\
+    \x05Acked\x10\0\x12\x07\n\x03Rev\x10\x01J\xb9\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\x02\0\x06\
     \x01\n\n\n\x03\x04\0\x01\x12\x03\x02\x08\x16\n\x0b\n\x04\x04\0\x02\0\x12\
     \x03\x03\x04\x12\n\x0c\n\x05\x04\0\x02\0\x05\x12\x03\x03\x04\n\n\x0c\n\
@@ -323,8 +323,8 @@ static file_descriptor_proto_data: &'static [u8] = b"\
     \x07\0\n\x01\n\n\n\x03\x05\0\x01\x12\x03\x07\x05\x0f\n\x0b\n\x04\x05\0\
     \x02\0\x12\x03\x08\x04\x0e\n\x0c\n\x05\x05\0\x02\0\x01\x12\x03\x08\x04\t\
     \n\x0c\n\x05\x05\0\x02\0\x02\x12\x03\x08\x0c\r\n\x0b\n\x04\x05\0\x02\x01\
-    \x12\x03\t\x04\x0e\n\x0c\n\x05\x05\0\x02\x01\x01\x12\x03\t\x04\t\n\x0c\n\
-    \x05\x05\0\x02\x01\x02\x12\x03\t\x0c\rb\x06proto3\
+    \x12\x03\t\x04\x0c\n\x0c\n\x05\x05\0\x02\x01\x01\x12\x03\t\x04\x07\n\x0c\
+    \n\x05\x05\0\x02\x01\x02\x12\x03\t\n\x0bb\x06proto3\
 ";
 
 static file_descriptor_proto_lazy: ::protobuf::rt::LazyV2<::protobuf::descriptor::FileDescriptorProto> = ::protobuf::rt::LazyV2::INIT;

rust-lib/flowy-document/src/protobuf/proto/doc.proto

@@ -7,11 +7,12 @@ message CreateDocParams {
 message Doc {
     string id = 1;
     bytes data = 2;
-    int64 revision = 3;
+    int64 rev_id = 3;
 }
 message UpdateDocParams {
     string doc_id = 1;
     bytes data = 2;
+    int64 rev_id = 3;
 }
 message DocDelta {
     string doc_id = 1;

rust-lib/flowy-document/src/protobuf/proto/ws.proto

@@ -7,5 +7,5 @@ message WsDocumentData {
 }
 enum WsDataType {
     Acked = 0;
-    Delta = 1;
+    Rev = 1;
 }

rust-lib/flowy-document/src/services/cache.rs

@@ -4,7 +4,7 @@ use dashmap::DashMap;
 
 use crate::{
     errors::DocError,
-    services::doc::edit_context::{DocId, EditDocContext},
+    services::doc::edit_doc_context::{DocId, EditDocContext},
 };
 
 pub(crate) struct DocCache {
@@ -17,22 +17,18 @@ impl DocCache {
     pub(crate) fn set(&self, doc: Arc<EditDocContext>) {
         let doc_id = doc.id.clone();
         if self.inner.contains_key(&doc_id) {
-            log::warn!("Doc:{} already exists in cache", doc_id.as_ref());
+            log::warn!("Doc:{} already exists in cache", &doc_id);
         }
-        self.inner.insert(doc.id.clone(), doc);
+        self.inner.insert(doc_id, doc);
     }
 
-    pub(crate) fn is_opened(&self, doc_id: &str) -> bool {
-        let doc_id: DocId = doc_id.into();
-        self.inner.get(&doc_id).is_some()
-    }
+    pub(crate) fn is_opened(&self, doc_id: &str) -> bool { self.inner.get(doc_id).is_some() }
 
     pub(crate) fn get(&self, doc_id: &str) -> Result<Arc<EditDocContext>, DocError> {
         if !self.is_opened(&doc_id) {
             return Err(doc_not_found());
         }
-        let doc_id: DocId = doc_id.into();
-        let opened_doc = self.inner.get(&doc_id).unwrap();
+        let opened_doc = self.inner.get(doc_id).unwrap();
         Ok(opened_doc.clone())
     }
 

rust-lib/flowy-document/src/services/doc/doc_controller.rs

@@ -2,12 +2,14 @@ use crate::{
     entities::doc::{CreateDocParams, Doc, DocDelta, QueryDocParams, UpdateDocParams},
     errors::{internal_error, DocError},
     module::DocumentUser,
-    services::{cache::DocCache, doc::edit_context::EditDocContext, server::Server, ws::WsDocumentManager},
+    services::{cache::DocCache, doc::edit_doc_context::EditDocContext, server::Server, ws::WsDocumentManager},
     sql_tables::doc::{DocTable, DocTableSql, OpTableSql},
 };
 use bytes::Bytes;
 use flowy_database::{ConnectionPool, SqliteConnection};
 
+use crate::services::doc::rev_manager::RevisionManager;
+use flowy_ot::core::Delta;
 use parking_lot::RwLock;
 use std::sync::Arc;
 
@@ -40,7 +42,7 @@ impl DocController {
         let doc = Doc {
             id: params.id,
             data: params.data,
-            revision: 0,
+            rev_id: 0,
         };
         let _ = self.doc_sql.create_doc_table(DocTable::new(doc), conn)?;
         Ok(())
@@ -76,10 +78,10 @@ impl DocController {
         Ok(())
     }
 
-    #[tracing::instrument(level = "debug", skip(self, delta, pool), err)]
-    pub(crate) fn edit_doc(&self, delta: DocDelta, pool: Arc<ConnectionPool>) -> Result<Doc, DocError> {
+    #[tracing::instrument(level = "debug", skip(self, delta), err)]
+    pub(crate) fn edit_doc(&self, delta: DocDelta) -> Result<Doc, DocError> {
         let edit_doc_ctx = self.cache.get(&delta.doc_id)?;
-        let _ = edit_doc_ctx.apply_delta(Bytes::from(delta.data), pool)?;
+        let _ = edit_doc_ctx.apply_local_delta(Bytes::from(delta.data))?;
         Ok(edit_doc_ctx.doc())
     }
 }
@@ -107,7 +109,7 @@ impl DocController {
         match self.server.read_doc(&token, params).await? {
             None => Err(DocError::not_found()),
             Some(doc) => {
-                let edit = self.make_edit_context(doc.clone())?;
+                let edit = self.make_edit_context(doc.clone(), pool.clone())?;
                 let conn = &*(pool.get().map_err(internal_error)?);
                 let _ = self.doc_sql.create_doc_table(doc.into(), conn)?;
                 Ok(edit)
@@ -133,7 +135,7 @@ impl DocController {
 
     async fn _open(&self, params: QueryDocParams, pool: Arc<ConnectionPool>) -> Result<Arc<EditDocContext>, DocError> {
         match self.doc_sql.read_doc_table(&params.doc_id, pool.clone()) {
-            Ok(doc_table) => Ok(self.make_edit_context(doc_table.into())?),
+            Ok(doc_table) => Ok(self.make_edit_context(doc_table.into(), pool.clone())?),
             Err(error) => {
                 if error.is_record_not_found() {
                     log::debug!("Doc:{} don't exist, reading from server", params.doc_id);
@@ -145,12 +147,15 @@ impl DocController {
         }
     }
 
-    fn make_edit_context(&self, doc: Doc) -> Result<Arc<EditDocContext>, DocError> {
+    fn make_edit_context(&self, doc: Doc, pool: Arc<ConnectionPool>) -> Result<Arc<EditDocContext>, DocError> {
         // Opti: require upgradable_read lock and then upgrade to write lock using
         // RwLockUpgradableReadGuard::upgrade(xx) of ws
-        let ws = self.ws.read().sender();
-        let edit_ctx = Arc::new(EditDocContext::new(doc, ws, self.op_sql.clone())?);
-        self.ws.write().register_handler(edit_ctx.id.as_ref(), edit_ctx.clone());
+        let doc_id = doc.id.clone();
+        let delta = Delta::from_bytes(doc.data)?;
+        let ws_sender = self.ws.read().sender();
+        let rev_manager = RevisionManager::new(&doc_id, doc.rev_id, self.op_sql.clone(), pool, ws_sender);
+        let edit_ctx = Arc::new(EditDocContext::new(&doc_id, delta, rev_manager)?);
+        self.ws.write().register_handler(&doc_id, edit_ctx.clone());
         self.cache.set(edit_ctx.clone());
         Ok(edit_ctx)
     }

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

@@ -53,15 +53,14 @@ impl Document {
 
     pub fn to_plain_string(&self) -> String { self.delta.apply("").unwrap() }
 
-    pub fn apply_delta_data(&mut self, data: Bytes) -> Result<(), DocError> {
-        let new_delta = Delta::from_bytes(data.to_vec())?;
-        self.apply_delta(new_delta)
-    }
+    pub fn delta(&self) -> &Delta { &self.delta }
+
+    pub fn set_delta(&mut self, data: Delta) { self.delta = data; }
 
     pub fn apply_delta(&mut self, delta: Delta) -> Result<(), DocError> {
         log::trace!("Apply delta: {}", delta);
         let _ = self.add_delta(&delta)?;
-        log::trace!("Document: {}", self.to_json());
+        log::debug!("Document: {}", self.to_json());
         Ok(())
     }
 
@@ -146,10 +145,6 @@ impl Document {
             },
         }
     }
-
-    pub fn data(&self) -> &Delta { &self.delta }
-
-    pub fn set_data(&mut self, data: Delta) { self.delta = data; }
 }
 
 impl Document {

rust-lib/flowy-document/src/services/doc/edit_context.rs

@@ -1,148 +0,0 @@
-use crate::{
-    entities::{
-        doc::{Doc, Revision},
-        ws::{WsDataType, WsDocumentData},
-    },
-    errors::{internal_error, DocError},
-    services::{
-        doc::Document,
-        ws::{WsDocumentHandler, WsDocumentSender},
-    },
-    sql_tables::doc::{OpTable, OpTableSql},
-};
-use bytes::Bytes;
-use flowy_database::ConnectionPool;
-use flowy_ot::core::Delta;
-use parking_lot::RwLock;
-use std::{
-    convert::TryInto,
-    sync::{
-        atomic::{AtomicI64, Ordering::SeqCst},
-        Arc,
-    },
-};
-
-pub(crate) struct EditDocContext {
-    pub(crate) id: DocId,
-    pub(crate) rev_counter: RevCounter,
-    document: RwLock<Document>,
-    ws: Arc<dyn WsDocumentSender>,
-    op_sql: Arc<OpTableSql>,
-}
-
-impl EditDocContext {
-    pub(crate) fn new(doc: Doc, ws: Arc<dyn WsDocumentSender>, op_sql: Arc<OpTableSql>) -> Result<Self, DocError> {
-        let id: DocId = doc.id.into();
-        let rev_counter = RevCounter::new(doc.revision);
-        let delta: Delta = doc.data.try_into()?;
-        let document = RwLock::new(Document::from_delta(delta));
-
-        Ok(Self {
-            id,
-            rev_counter,
-            document,
-            ws,
-            op_sql,
-        })
-    }
-
-    pub(crate) fn doc(&self) -> Doc {
-        Doc {
-            id: self.id.clone().into(),
-            data: self.document.read().to_bytes(),
-            revision: self.rev_counter.value(),
-        }
-    }
-
-    pub(crate) fn apply_delta(&self, data: Bytes, pool: Arc<ConnectionPool>) -> Result<(), DocError> {
-        let mut guard = self.document.write();
-        let base_rev_id = self.rev_counter.value();
-        let rev_id = self.rev_counter.next();
-        let delta = Delta::from_bytes(data.to_vec())?;
-
-        let _ = guard.apply_delta(delta)?;
-        let json = guard.to_json();
-        drop(guard);
-
-        // Opti: it is necessary to save the rev if send success?
-        let md5 = format!("{:x}", md5::compute(json));
-        let revision = Revision::new(base_rev_id, rev_id, data.to_vec(), md5, self.id.clone().into());
-        let _ = self.save_revision(revision.clone(), pool.clone())?;
-        match self.ws.send(revision.into()) {
-            Ok(_) => {
-                // TODO: remove the rev if send success
-                // let _ = self.delete_revision(rev_id, pool)?;
-            },
-            Err(e) => {
-                log::error!("Send delta failed: {:?}", e);
-            },
-        }
-        Ok(())
-    }
-}
-
-impl EditDocContext {
-    fn save_revision(&self, revision: Revision, pool: Arc<ConnectionPool>) -> Result<(), DocError> {
-        let conn = &*pool.get().map_err(internal_error)?;
-        // conn.immediate_transaction::<_, DocError, _>(|| {
-        //     let op_table: OpTable = revision.into();
-        //     let _ = self.op_sql.create_op_table(op_table, conn)?;
-        //     Ok(())
-        // })?;
-
-        Ok(())
-    }
-
-    fn delete_revision(&self, rev_id: i64, pool: Arc<ConnectionPool>) -> Result<(), DocError> {
-        let conn = &*pool.get().map_err(internal_error)?;
-        conn.immediate_transaction::<_, DocError, _>(|| {
-            let _ = self.op_sql.delete_op_table(rev_id, conn)?;
-            Ok(())
-        })?;
-        Ok(())
-    }
-}
-
-use byteorder::{BigEndian, ReadBytesExt};
-use std::io::Cursor;
-impl WsDocumentHandler for EditDocContext {
-    fn receive(&self, doc_data: WsDocumentData) {
-        match doc_data.ty {
-            WsDataType::Delta => {},
-            WsDataType::Acked => {
-                let mut rdr = Cursor::new(doc_data.data);
-                let rev = rdr.read_i64::<BigEndian>().unwrap();
-            },
-        }
-    }
-}
-
-#[derive(Debug, Clone, Eq, PartialEq, Hash)]
-pub struct DocId(pub(crate) String);
-
-impl AsRef<str> for DocId {
-    fn as_ref(&self) -> &str { &self.0 }
-}
-
-impl<T> std::convert::From<T> for DocId
-where
-    T: ToString,
-{
-    fn from(s: T) -> Self { DocId(s.to_string()) }
-}
-
-impl std::convert::Into<String> for DocId {
-    fn into(self) -> String { self.0.clone() }
-}
-
-#[derive(Debug)]
-pub struct RevCounter(pub AtomicI64);
-
-impl RevCounter {
-    pub fn new(n: i64) -> Self { Self(AtomicI64::new(n)) }
-    pub fn next(&self) -> i64 {
-        let _ = self.0.fetch_add(1, SeqCst);
-        self.value()
-    }
-    pub fn value(&self) -> i64 { self.0.load(SeqCst) }
-}

rust-lib/flowy-document/src/services/doc/edit_doc_context.rs

@@ -0,0 +1,100 @@
+use crate::{
+    entities::{
+        doc::{Doc, Revision},
+        ws::{WsDataType, WsDocumentData},
+    },
+    errors::*,
+    services::{
+        doc::{rev_manager::RevisionManager, Document},
+        util::{bytes_to_rev_id, md5},
+        ws::{WsDocumentHandler, WsDocumentSender},
+    },
+    sql_tables::{OpTable, OpTableSql},
+};
+use bytes::Bytes;
+use flowy_ot::core::Delta;
+use parking_lot::RwLock;
+use std::{convert::TryFrom, sync::Arc};
+use tokio::sync::mpsc::{unbounded_channel, UnboundedReceiver};
+
+pub type DocId = String;
+
+pub(crate) struct EditDocContext {
+    pub(crate) id: DocId,
+    document: Arc<RwLock<Document>>,
+    rev_manager: Arc<RevisionManager>,
+}
+
+impl EditDocContext {
+    pub(crate) fn new(doc_id: &str, delta: Delta, rev_manager: RevisionManager) -> Result<Self, DocError> {
+        let id = doc_id.to_owned();
+        let rev_manager = Arc::new(rev_manager);
+        let document = Arc::new(RwLock::new(Document::from_delta(delta)));
+        let edit_context = Self { id, document, rev_manager };
+        edit_context.composing_delta();
+
+        Ok(edit_context)
+    }
+
+    pub(crate) fn doc(&self) -> Doc {
+        Doc {
+            id: self.id.clone(),
+            data: self.document.read().to_bytes(),
+            rev_id: self.rev_manager.rev(),
+        }
+    }
+
+    #[tracing::instrument(level = "debug", skip(self, data), err)]
+    pub(crate) fn apply_local_delta(&self, data: Bytes) -> Result<(), DocError> {
+        let doc_id = self.id.clone();
+        let (base_rev_id, rev_id) = self.rev_manager.next_rev();
+        let revision = Revision::new(base_rev_id, rev_id, data.to_vec(), md5(&data), doc_id);
+
+        let delta = Delta::from_bytes(data.to_vec())?;
+        self.document.write().apply_delta(delta)?;
+
+        self.rev_manager.add_local(revision);
+        Ok(())
+    }
+
+    fn composing_delta(&self) {
+        let rev_manager = self.rev_manager.clone();
+        let document = self.document.clone();
+        tokio::spawn(async move {
+            let notified = rev_manager.notified();
+            tokio::select! {
+                _ = notified => {
+                    if let Some(delta) = rev_manager.next_compose_delta() {
+                        log::info!("😁receive delta: {:?}", delta);
+                        document.write().apply_delta(delta).unwrap();
+                        log::info!("😁Document: {:?}", document.read().to_plain_string());
+                    }
+                }
+            }
+        });
+    }
+}
+
+impl WsDocumentHandler for EditDocContext {
+    fn receive(&self, doc_data: WsDocumentData) {
+        let f = |doc_data: WsDocumentData| {
+            match doc_data.ty {
+                WsDataType::Rev => {
+                    let bytes = Bytes::from(doc_data.data);
+                    let revision = Revision::try_from(bytes)?;
+                    self.rev_manager.add_remote(revision);
+                },
+                WsDataType::Acked => {
+                    let rev_id = bytes_to_rev_id(doc_data.data)?;
+                    self.rev_manager.remove(rev_id);
+                },
+            }
+
+            Result::<(), DocError>::Ok(())
+        };
+
+        if let Err(e) = f(doc_data) {
+            log::error!("{:?}", e);
+        }
+    }
+}

rust-lib/flowy-document/src/services/doc/extensions/delete/preserve_line_format_merge.rs

@@ -1,6 +1,7 @@
-use crate::services::doc::{extensions::DeleteExt, util::is_newline};
 use flowy_ot::core::{plain_attributes, CharMetric, Delta, DeltaBuilder, DeltaIter, Interval, NEW_LINE};
 
+use crate::services::{doc::extensions::DeleteExt, util::is_newline};
+
 pub struct PreserveLineFormatOnMerge {}
 impl DeleteExt for PreserveLineFormatOnMerge {
     fn ext_name(&self) -> &str { "PreserveLineFormatOnMerge" }

rust-lib/flowy-document/src/services/doc/extensions/format/helper.rs

@@ -1,4 +1,4 @@
-use crate::services::doc::util::find_newline;
+use crate::services::util::find_newline;
 use flowy_ot::core::{plain_attributes, Attribute, AttributeScope, Delta, Operation};
 
 pub(crate) fn line_break(op: &Operation, attribute: &Attribute, scope: AttributeScope) -> Delta {

rust-lib/flowy-document/src/services/doc/extensions/format/resolve_block_format.rs

@@ -1,8 +1,9 @@
-use crate::services::doc::{
-    extensions::{format::helper::line_break, FormatExt},
+use flowy_ot::core::{plain_attributes, Attribute, AttributeScope, Delta, DeltaBuilder, DeltaIter, Interval};
+
+use crate::services::{
+    doc::extensions::{format::helper::line_break, FormatExt},
     util::find_newline,
 };
-use flowy_ot::core::{plain_attributes, Attribute, AttributeScope, Delta, DeltaBuilder, DeltaIter, Interval};
 
 pub struct ResolveBlockFormat {}
 impl FormatExt for ResolveBlockFormat {

rust-lib/flowy-document/src/services/doc/extensions/format/resolve_inline_format.rs

@@ -1,8 +1,9 @@
-use crate::services::doc::{
-    extensions::{format::helper::line_break, FormatExt},
+use flowy_ot::core::{Attribute, AttributeScope, Delta, DeltaBuilder, DeltaIter, Interval};
+
+use crate::services::{
+    doc::extensions::{format::helper::line_break, FormatExt},
     util::find_newline,
 };
-use flowy_ot::core::{Attribute, AttributeScope, Delta, DeltaBuilder, DeltaIter, Interval};
 
 pub struct ResolveInlineFormat {}
 impl FormatExt for ResolveInlineFormat {

rust-lib/flowy-document/src/services/doc/extensions/insert/auto_exit_block.rs

@@ -1,6 +1,7 @@
-use crate::services::doc::{extensions::InsertExt, util::is_newline};
 use flowy_ot::core::{attributes_except_header, is_empty_line_at_index, AttributeKey, Delta, DeltaBuilder, DeltaIter};
 
+use crate::services::{doc::extensions::InsertExt, util::is_newline};
+
 pub struct AutoExitBlock {}
 
 impl InsertExt for AutoExitBlock {

rust-lib/flowy-document/src/services/doc/extensions/insert/auto_format.rs

@@ -1,9 +1,12 @@
-use crate::services::doc::{extensions::InsertExt, util::is_whitespace};
-use bytecount::num_chars;
-use flowy_ot::core::{plain_attributes, Attribute, Attributes, Delta, DeltaBuilder, DeltaIter};
 use std::cmp::min;
+
+use bytecount::num_chars;
 use url::Url;
 
+use flowy_ot::core::{plain_attributes, Attribute, Attributes, Delta, DeltaBuilder, DeltaIter};
+
+use crate::services::{doc::extensions::InsertExt, util::is_whitespace};
+
 pub struct AutoFormatExt {}
 impl InsertExt for AutoFormatExt {
     fn ext_name(&self) -> &str { std::any::type_name::<AutoFormatExt>() }

rust-lib/flowy-document/src/services/doc/extensions/insert/preserve_block_format.rs

@@ -1,4 +1,3 @@
-use crate::services::doc::{extensions::InsertExt, util::is_newline};
 use flowy_ot::core::{
     attributes_except_header,
     plain_attributes,
@@ -11,6 +10,8 @@ use flowy_ot::core::{
     NEW_LINE,
 };
 
+use crate::services::{doc::extensions::InsertExt, util::is_newline};
+
 pub struct PreserveBlockFormatOnInsert {}
 impl InsertExt for PreserveBlockFormatOnInsert {
     fn ext_name(&self) -> &str { std::any::type_name::<PreserveBlockFormatOnInsert>() }

rust-lib/flowy-document/src/services/doc/extensions/insert/preserve_inline_format.rs

@@ -1,8 +1,9 @@
-use crate::services::doc::{
-    extensions::InsertExt,
+use flowy_ot::core::{plain_attributes, AttributeKey, Delta, DeltaBuilder, DeltaIter, OpNewline, NEW_LINE};
+
+use crate::services::{
+    doc::extensions::InsertExt,
     util::{contain_newline, is_newline},
 };
-use flowy_ot::core::{plain_attributes, AttributeKey, Delta, DeltaBuilder, DeltaIter, OpNewline, NEW_LINE};
 
 pub struct PreserveInlineFormat {}
 impl InsertExt for PreserveInlineFormat {

rust-lib/flowy-document/src/services/doc/extensions/insert/reset_format_on_new_line.rs

@@ -1,6 +1,7 @@
-use crate::services::doc::{extensions::InsertExt, util::is_newline};
 use flowy_ot::core::{AttributeKey, Attributes, CharMetric, Delta, DeltaBuilder, DeltaIter, NEW_LINE};
 
+use crate::services::{doc::extensions::InsertExt, util::is_newline};
+
 pub struct ResetLineFormatOnNewLine {}
 impl InsertExt for ResetLineFormatOnNewLine {
     fn ext_name(&self) -> &str { std::any::type_name::<ResetLineFormatOnNewLine>() }

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

@@ -7,6 +7,6 @@ mod history;
 mod view;
 
 pub(crate) mod doc_controller;
-pub mod edit_context;
+pub mod edit_doc_context;
 pub mod extensions;
-mod util;
+mod rev_manager;

rust-lib/flowy-document/src/services/doc/rev_manager.rs

@@ -0,0 +1,128 @@
+use crate::{
+    entities::{
+        doc::Revision,
+        ws::{WsDataType, WsDocumentData},
+    },
+    errors::{internal_error, DocError},
+    services::{
+        util::{bytes_to_rev_id, RevIdCounter},
+        ws::{WsDocumentHandler, WsDocumentSender},
+    },
+    sql_tables::{OpTable, OpTableSql},
+};
+use bytes::Bytes;
+use flowy_database::ConnectionPool;
+use flowy_infra::future::wrap_future;
+use flowy_ot::core::Delta;
+use parking_lot::RwLock;
+use std::{collections::BTreeMap, sync::Arc};
+use tokio::sync::{futures::Notified, Notify};
+
+pub struct RevisionManager {
+    doc_id: String,
+    op_sql: Arc<OpTableSql>,
+    pool: Arc<ConnectionPool>,
+    rev_id_counter: RevIdCounter,
+    ws_sender: Arc<dyn WsDocumentSender>,
+    rev_cache: RwLock<BTreeMap<i64, Revision>>,
+    notify: Notify,
+}
+
+impl RevisionManager {
+    pub fn new(
+        doc_id: &str,
+        rev_id: i64,
+        op_sql: Arc<OpTableSql>,
+        pool: Arc<ConnectionPool>,
+        ws_sender: Arc<dyn WsDocumentSender>,
+    ) -> Self {
+        let rev_id_counter = RevIdCounter::new(rev_id);
+        let rev_cache = RwLock::new(BTreeMap::new());
+        Self {
+            doc_id: doc_id.to_owned(),
+            op_sql,
+            pool,
+            rev_id_counter,
+            ws_sender,
+            rev_cache,
+            notify: Notify::new(),
+        }
+    }
+
+    pub fn next_compose_delta(&self) -> Option<Delta> {
+        // let delta = Delta::from_bytes(revision.delta)?;
+        //
+        // log::debug!("Remote delta: {:?}", delta);
+    }
+
+    pub fn notified(&self) -> Notified { self.notify.notified() }
+
+    pub fn next_rev(&self) -> (i64, i64) {
+        let cur = self.rev_id_counter.value();
+        let next = self.rev_id_counter.next();
+        (cur, next)
+    }
+
+    pub fn rev(&self) -> i64 { self.rev_id_counter.value() }
+
+    pub fn add_local(&self, revision: Revision) -> Result<(), DocError> {
+        self.rev_cache.write().insert(revision.rev_id, revision.clone());
+        match self.ws_sender.send(revision.into()) {
+            Ok(_) => {},
+            Err(e) => {
+                log::error!("Send delta failed: {:?}", e);
+            },
+        }
+        // self.save_revision(revision.clone());
+        Ok(())
+    }
+
+    #[tracing::instrument(level = "debug", skip(self, revision))]
+    pub fn add_remote(&self, revision: Revision) -> Result<(), DocError> {
+        self.rev_cache.write().insert(revision.rev_id, revision);
+        // self.save_revision(revision.clone());
+        self.notify.notify_waiters();
+        Ok(())
+    }
+
+    pub fn remove(&self, rev_id: i64) -> Result<(), DocError> {
+        self.rev_cache.write().remove(&rev_id);
+        // self.delete_revision(rev_id);
+        Ok(())
+    }
+
+    fn save_revision(&self, revision: Revision) {
+        let op_sql = self.op_sql.clone();
+        let pool = self.pool.clone();
+        tokio::spawn(async move {
+            let conn = &*pool.get().map_err(internal_error).unwrap();
+            let result = conn.immediate_transaction::<_, DocError, _>(|| {
+                let op_table: OpTable = revision.into();
+                let _ = op_sql.create_op_table(op_table, conn).unwrap();
+                Ok(())
+            });
+
+            match result {
+                Ok(_) => {},
+                Err(e) => log::error!("Save revision failed: {:?}", e),
+            }
+        });
+    }
+
+    fn delete_revision(&self, rev_id: i64) {
+        let op_sql = self.op_sql.clone();
+        let pool = self.pool.clone();
+        tokio::spawn(async move {
+            let conn = &*pool.get().map_err(internal_error).unwrap();
+            let result = conn.immediate_transaction::<_, DocError, _>(|| {
+                let _ = op_sql.delete_op_table(rev_id, conn)?;
+                Ok(())
+            });
+
+            match result {
+                Ok(_) => {},
+                Err(e) => log::error!("Delete revision failed: {:?}", e),
+            }
+        });
+    }
+}

rust-lib/flowy-document/src/services/doc/util.rs

@@ -1,18 +0,0 @@
-use flowy_ot::core::{NEW_LINE, WHITESPACE};
-
-#[inline]
-pub fn find_newline(s: &str) -> Option<usize> {
-    match s.find(NEW_LINE) {
-        None => None,
-        Some(line_break) => Some(line_break),
-    }
-}
-
-#[inline]
-pub fn is_newline(s: &str) -> bool { s == NEW_LINE }
-
-#[inline]
-pub fn is_whitespace(s: &str) -> bool { s == WHITESPACE }
-
-#[inline]
-pub fn contain_newline(s: &str) -> bool { s.contains(NEW_LINE) }

rust-lib/flowy-document/src/services/mod.rs

@@ -1,4 +1,5 @@
 mod cache;
 pub mod doc;
 pub mod server;
+mod util;
 pub mod ws;

rust-lib/flowy-document/src/services/util.rs

@@ -0,0 +1,51 @@
+use crate::errors::DocError;
+use byteorder::{BigEndian, ReadBytesExt};
+use flowy_ot::core::{NEW_LINE, WHITESPACE};
+use std::{
+    io::Cursor,
+    sync::atomic::{AtomicI64, Ordering::SeqCst},
+};
+
+#[inline]
+pub fn find_newline(s: &str) -> Option<usize> {
+    match s.find(NEW_LINE) {
+        None => None,
+        Some(line_break) => Some(line_break),
+    }
+}
+
+#[inline]
+pub fn is_newline(s: &str) -> bool { s == NEW_LINE }
+
+#[inline]
+pub fn is_whitespace(s: &str) -> bool { s == WHITESPACE }
+
+#[inline]
+pub fn contain_newline(s: &str) -> bool { s.contains(NEW_LINE) }
+
+#[inline]
+pub fn md5<T: AsRef<[u8]>>(data: T) -> String {
+    let md5 = format!("{:x}", md5::compute(data));
+    md5
+}
+
+#[inline]
+pub fn bytes_to_rev_id(bytes: Vec<u8>) -> Result<i64, DocError> {
+    let mut rdr = Cursor::new(bytes);
+    match rdr.read_i64::<BigEndian>() {
+        Ok(rev_id) => Ok(rev_id),
+        Err(e) => Err(DocError::internal().context(e)),
+    }
+}
+
+#[derive(Debug)]
+pub(crate) struct RevIdCounter(pub AtomicI64);
+
+impl RevIdCounter {
+    pub fn new(n: i64) -> Self { Self(AtomicI64::new(n)) }
+    pub fn next(&self) -> i64 {
+        let _ = self.0.fetch_add(1, SeqCst);
+        self.value()
+    }
+    pub fn value(&self) -> i64 { self.0.load(SeqCst) }
+}

rust-lib/flowy-document/src/sql_tables/doc/doc_op_table.rs

@@ -4,8 +4,9 @@ use flowy_database::schema::op_table;
 
 #[derive(PartialEq, Clone, Debug, Queryable, Identifiable, Insertable, Associations)]
 #[table_name = "op_table"]
-#[primary_key(rev_id)]
+#[primary_key(doc_id)]
 pub(crate) struct OpTable {
+    pub(crate) doc_id: String,
     pub(crate) base_rev_id: i64,
     pub(crate) rev_id: i64,
     pub(crate) data: Vec<u8>,
@@ -17,9 +18,8 @@ pub(crate) struct OpTable {
 #[repr(i32)]
 #[sql_type = "Integer"]
 pub enum OpState {
-    Local   = 0,
-    Sending = 1,
-    Acked   = 2,
+    Local = 0,
+    Acked = 1,
 }
 
 impl std::default::Default for OpState {
@@ -30,8 +30,7 @@ impl std::convert::From<i32> for OpState {
     fn from(value: i32) -> Self {
         match value {
             0 => OpState::Local,
-            1 => OpState::Sending,
-            2 => OpState::Acked,
+            1 => OpState::Acked,
             o => {
                 log::error!("Unsupported view type {}, fallback to ViewType::Docs", o);
                 OpState::Local
@@ -48,8 +47,9 @@ impl_sql_integer_expression!(OpState);
 
 #[derive(AsChangeset, Identifiable, Default, Debug)]
 #[table_name = "op_table"]
-#[primary_key(rev_id)]
+#[primary_key(doc_id)]
 pub(crate) struct OpChangeset {
+    pub(crate) doc_id: String,
     pub(crate) rev_id: i64,
     pub(crate) state: Option<OpState>,
 }
@@ -57,6 +57,7 @@ pub(crate) struct OpChangeset {
 impl std::convert::Into<OpTable> for Revision {
     fn into(self) -> OpTable {
         OpTable {
+            doc_id: self.doc_id,
             base_rev_id: self.base_rev_id,
             rev_id: self.rev_id,
             data: self.delta,

rust-lib/flowy-document/src/sql_tables/doc/doc_table.rs

@@ -40,7 +40,7 @@ impl std::convert::Into<Doc> for DocTable {
         Doc {
             id: self.id,
             data: self.data,
-            revision: self.revision,
+            rev_id: self.revision,
         }
     }
 }
@@ -50,7 +50,7 @@ impl std::convert::From<Doc> for DocTable {
         Self {
             id: doc.id,
             data: doc.data,
-            revision: doc.revision,
+            revision: doc.rev_id,
         }
     }
 }

rust-lib/flowy-document/src/sql_tables/mod.rs

@@ -1 +1,3 @@
-pub mod doc;
+pub(crate) mod doc;
+
+pub use doc::*;

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

@@ -131,20 +131,20 @@ impl TestBuilder {
             },
             TestOp::Transform(delta_a_i, delta_b_i) => {
                 let (a_prime, b_prime) = self.documents[*delta_a_i]
-                    .data()
-                    .transform(&self.documents[*delta_b_i].data())
+                    .delta()
+                    .transform(&self.documents[*delta_b_i].delta())
                     .unwrap();
                 log::trace!("a:{:?},b:{:?}", a_prime, b_prime);
 
-                let data_left = self.documents[*delta_a_i].data().compose(&b_prime).unwrap();
-                let data_right = self.documents[*delta_b_i].data().compose(&a_prime).unwrap();
+                let data_left = self.documents[*delta_a_i].delta().compose(&b_prime).unwrap();
+                let data_right = self.documents[*delta_b_i].delta().compose(&a_prime).unwrap();
 
-                self.documents[*delta_a_i].set_data(data_left);
-                self.documents[*delta_b_i].set_data(data_right);
+                self.documents[*delta_a_i].set_delta(data_left);
+                self.documents[*delta_b_i].set_delta(data_right);
             },
             TestOp::Invert(delta_a_i, delta_b_i) => {
-                let delta_a = &self.documents[*delta_a_i].data();
-                let delta_b = &self.documents[*delta_b_i].data();
+                let delta_a = &self.documents[*delta_a_i].delta();
+                let delta_b = &self.documents[*delta_b_i].delta();
                 log::debug!("Invert: ");
                 log::debug!("a: {}", delta_a.to_json());
                 log::debug!("b: {}", delta_b.to_json());
@@ -162,7 +162,7 @@ impl TestBuilder {
 
                 assert_eq!(delta_a, &&new_delta_after_undo);
 
-                self.documents[*delta_a_i].set_data(new_delta_after_undo);
+                self.documents[*delta_a_i].set_delta(new_delta_after_undo);
             },
             TestOp::Undo(delta_i) => {
                 self.documents[*delta_i].undo().unwrap();

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

@@ -495,6 +495,18 @@ fn delta_transform_test() {
         r#"[{"retain":3,"attributes":{"bold":true}},{"insert":"456"}]"#,
         serde_json::to_string(&b_prime).unwrap()
     );
+
+    let new_a = a.compose(&b_prime).unwrap();
+    let new_b = b.compose(&a_prime).unwrap();
+    assert_eq!(
+        r#"[{"insert":"123","attributes":{"bold":true}},{"insert":"456"}]"#,
+        serde_json::to_string(&new_a).unwrap()
+    );
+
+    assert_eq!(
+        r#"[{"insert":"123","attributes":{"bold":true}},{"insert":"456"}]"#,
+        serde_json::to_string(&new_b).unwrap()
+    );
 }
 
 #[test]

rust-lib/flowy-infra/src/future.rs

@@ -7,13 +7,20 @@ use std::{
     task::{Context, Poll},
 };
 
+pub fn wrap_future<T, O>(f: T) -> FnFuture<O>
+where
+    T: Future<Output = O> + Send + Sync + 'static,
+{
+    FnFuture { fut: Box::pin(f) }
+}
+
 #[pin_project]
-pub struct ClosureFuture<T> {
+pub struct FnFuture<T> {
     #[pin]
     pub fut: Pin<Box<dyn Future<Output = T> + Sync + Send>>,
 }
 
-impl<T> Future for ClosureFuture<T>
+impl<T> Future for FnFuture<T>
 where
     T: Send + Sync,
 {

rust-lib/flowy-infra/src/lib.rs

@@ -9,9 +9,6 @@ pub mod future;
 pub mod kv;
 mod protobuf;
 
-#[macro_use]
-pub mod macros;
-
 #[allow(dead_code)]
 pub fn uuid() -> String { uuid::Uuid::new_v4().to_string() }
 

rust-lib/flowy-infra/src/macros.rs

@@ -1,8 +0,0 @@
-#[macro_export]
-macro_rules! wrap_future_fn {
-    ($fut:expr) => {
-        ClosureFuture {
-            fut: Box::pin(async move { $fut.await }),
-        }
-    };
-}

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

@@ -9,7 +9,7 @@ use flowy_document::entities::ws::WsDocumentData;
 use flowy_user::{errors::ErrorCode, services::user::UserSession};
 use flowy_ws::{WsMessage, WsMessageHandler, WsModule};
 use parking_lot::RwLock;
-use std::{convert::TryInto, path::Path, sync::Arc};
+use std::{path::Path, sync::Arc};
 
 pub struct DocumentDepsResolver {
     user_session: Arc<UserSession>,

rust-lib/flowy-user/src/event.rs

@@ -4,7 +4,7 @@ use strum_macros::Display;
 #[derive(Clone, Copy, PartialEq, Eq, Debug, Display, Hash, ProtoBuf_Enum, Flowy_Event)]
 #[event_err = "UserError"]
 pub enum UserEvent {
-    #[event(output = "UserProfile")]
+    #[event()]
     InitUser       = 0,
 
     #[event(input = "SignInRequest", output = "UserProfile")]
@@ -21,4 +21,7 @@ pub enum UserEvent {
 
     #[event(output = "UserProfile")]
     GetUserProfile = 5,
+
+    #[event(output = "UserProfile")]
+    CheckUser      = 6,
 }

rust-lib/flowy-user/src/handlers/user_handler.rs

@@ -4,8 +4,14 @@ use flowy_dispatch::prelude::*;
 use std::{convert::TryInto, sync::Arc};
 
 #[tracing::instrument(skip(session))]
-pub async fn init_user_handler(session: Unit<Arc<UserSession>>) -> DataResult<UserProfile, UserError> {
-    let user_profile = session.init_user().await?;
+pub async fn init_user_handler(session: Unit<Arc<UserSession>>) -> Result<(), UserError> {
+    let _ = session.init_user().await?;
+    Ok(())
+}
+
+#[tracing::instrument(skip(session))]
+pub async fn check_user_handler(session: Unit<Arc<UserSession>>) -> DataResult<UserProfile, UserError> {
+    let user_profile = session.check_user().await?;
     data_result(user_profile)
 }
 

rust-lib/flowy-user/src/module.rs

@@ -13,4 +13,5 @@ pub fn create(user_session: Arc<UserSession>) -> Module {
         .event(UserEvent::GetUserProfile, get_user_profile_handler)
         .event(UserEvent::SignOut, sign_out)
         .event(UserEvent::UpdateUser, update_user_handler)
+        .event(UserEvent::CheckUser, check_user_handler)
 }

rust-lib/flowy-user/src/protobuf/model/event.rs

@@ -31,6 +31,7 @@ pub enum UserEvent {
     SignOut = 3,
     UpdateUser = 4,
     GetUserProfile = 5,
+    CheckUser = 6,
 }
 
 impl ::protobuf::ProtobufEnum for UserEvent {
@@ -46,6 +47,7 @@ impl ::protobuf::ProtobufEnum for UserEvent {
             3 => ::std::option::Option::Some(UserEvent::SignOut),
             4 => ::std::option::Option::Some(UserEvent::UpdateUser),
             5 => ::std::option::Option::Some(UserEvent::GetUserProfile),
+            6 => ::std::option::Option::Some(UserEvent::CheckUser),
             _ => ::std::option::Option::None
         }
     }
@@ -58,6 +60,7 @@ impl ::protobuf::ProtobufEnum for UserEvent {
             UserEvent::SignOut,
             UserEvent::UpdateUser,
             UserEvent::GetUserProfile,
+            UserEvent::CheckUser,
         ];
         values
     }
@@ -86,24 +89,26 @@ impl ::protobuf::reflect::ProtobufValue for UserEvent {
 }
 
 static file_descriptor_proto_data: &'static [u8] = b"\
-    \n\x0bevent.proto*b\n\tUserEvent\x12\x0c\n\x08InitUser\x10\0\x12\n\n\x06\
+    \n\x0bevent.proto*q\n\tUserEvent\x12\x0c\n\x08InitUser\x10\0\x12\n\n\x06\
     SignIn\x10\x01\x12\n\n\x06SignUp\x10\x02\x12\x0b\n\x07SignOut\x10\x03\
-    \x12\x0e\n\nUpdateUser\x10\x04\x12\x12\n\x0eGetUserProfile\x10\x05J\xa0\
-    \x02\n\x06\x12\x04\0\0\t\x01\n\x08\n\x01\x0c\x12\x03\0\0\x12\n\n\n\x02\
-    \x05\0\x12\x04\x02\0\t\x01\n\n\n\x03\x05\0\x01\x12\x03\x02\x05\x0e\n\x0b\
-    \n\x04\x05\0\x02\0\x12\x03\x03\x04\x11\n\x0c\n\x05\x05\0\x02\0\x01\x12\
-    \x03\x03\x04\x0c\n\x0c\n\x05\x05\0\x02\0\x02\x12\x03\x03\x0f\x10\n\x0b\n\
-    \x04\x05\0\x02\x01\x12\x03\x04\x04\x0f\n\x0c\n\x05\x05\0\x02\x01\x01\x12\
-    \x03\x04\x04\n\n\x0c\n\x05\x05\0\x02\x01\x02\x12\x03\x04\r\x0e\n\x0b\n\
-    \x04\x05\0\x02\x02\x12\x03\x05\x04\x0f\n\x0c\n\x05\x05\0\x02\x02\x01\x12\
-    \x03\x05\x04\n\n\x0c\n\x05\x05\0\x02\x02\x02\x12\x03\x05\r\x0e\n\x0b\n\
-    \x04\x05\0\x02\x03\x12\x03\x06\x04\x10\n\x0c\n\x05\x05\0\x02\x03\x01\x12\
-    \x03\x06\x04\x0b\n\x0c\n\x05\x05\0\x02\x03\x02\x12\x03\x06\x0e\x0f\n\x0b\
-    \n\x04\x05\0\x02\x04\x12\x03\x07\x04\x13\n\x0c\n\x05\x05\0\x02\x04\x01\
-    \x12\x03\x07\x04\x0e\n\x0c\n\x05\x05\0\x02\x04\x02\x12\x03\x07\x11\x12\n\
-    \x0b\n\x04\x05\0\x02\x05\x12\x03\x08\x04\x17\n\x0c\n\x05\x05\0\x02\x05\
-    \x01\x12\x03\x08\x04\x12\n\x0c\n\x05\x05\0\x02\x05\x02\x12\x03\x08\x15\
-    \x16b\x06proto3\
+    \x12\x0e\n\nUpdateUser\x10\x04\x12\x12\n\x0eGetUserProfile\x10\x05\x12\r\
+    \n\tCheckUser\x10\x06J\xc9\x02\n\x06\x12\x04\0\0\n\x01\n\x08\n\x01\x0c\
+    \x12\x03\0\0\x12\n\n\n\x02\x05\0\x12\x04\x02\0\n\x01\n\n\n\x03\x05\0\x01\
+    \x12\x03\x02\x05\x0e\n\x0b\n\x04\x05\0\x02\0\x12\x03\x03\x04\x11\n\x0c\n\
+    \x05\x05\0\x02\0\x01\x12\x03\x03\x04\x0c\n\x0c\n\x05\x05\0\x02\0\x02\x12\
+    \x03\x03\x0f\x10\n\x0b\n\x04\x05\0\x02\x01\x12\x03\x04\x04\x0f\n\x0c\n\
+    \x05\x05\0\x02\x01\x01\x12\x03\x04\x04\n\n\x0c\n\x05\x05\0\x02\x01\x02\
+    \x12\x03\x04\r\x0e\n\x0b\n\x04\x05\0\x02\x02\x12\x03\x05\x04\x0f\n\x0c\n\
+    \x05\x05\0\x02\x02\x01\x12\x03\x05\x04\n\n\x0c\n\x05\x05\0\x02\x02\x02\
+    \x12\x03\x05\r\x0e\n\x0b\n\x04\x05\0\x02\x03\x12\x03\x06\x04\x10\n\x0c\n\
+    \x05\x05\0\x02\x03\x01\x12\x03\x06\x04\x0b\n\x0c\n\x05\x05\0\x02\x03\x02\
+    \x12\x03\x06\x0e\x0f\n\x0b\n\x04\x05\0\x02\x04\x12\x03\x07\x04\x13\n\x0c\
+    \n\x05\x05\0\x02\x04\x01\x12\x03\x07\x04\x0e\n\x0c\n\x05\x05\0\x02\x04\
+    \x02\x12\x03\x07\x11\x12\n\x0b\n\x04\x05\0\x02\x05\x12\x03\x08\x04\x17\n\
+    \x0c\n\x05\x05\0\x02\x05\x01\x12\x03\x08\x04\x12\n\x0c\n\x05\x05\0\x02\
+    \x05\x02\x12\x03\x08\x15\x16\n\x0b\n\x04\x05\0\x02\x06\x12\x03\t\x04\x12\
+    \n\x0c\n\x05\x05\0\x02\x06\x01\x12\x03\t\x04\r\n\x0c\n\x05\x05\0\x02\x06\
+    \x02\x12\x03\t\x10\x11b\x06proto3\
 ";
 
 static file_descriptor_proto_lazy: ::protobuf::rt::LazyV2<::protobuf::descriptor::FileDescriptorProto> = ::protobuf::rt::LazyV2::INIT;

rust-lib/flowy-user/src/protobuf/proto/event.proto

@@ -7,4 +7,5 @@ enum UserEvent {
     SignOut = 3;
     UpdateUser = 4;
     GetUserProfile = 5;
+    CheckUser = 6;
 }

rust-lib/flowy-user/src/services/user/user_session.rs

@@ -141,7 +141,14 @@ impl UserSession {
         Ok(())
     }
 
-    pub async fn init_user(&self) -> Result<UserProfile, UserError> {
+    pub async fn init_user(&self) -> Result<(), UserError> {
+        let (_, token) = self.get_session()?.into_part();
+
+        let _ = self.start_ws_connection(&token)?;
+        Ok(())
+    }
+
+    pub async fn check_user(&self) -> Result<UserProfile, UserError> {
         let (user_id, token) = self.get_session()?.into_part();
 
         let user = dsl::user_table
@@ -149,8 +156,6 @@ impl UserSession {
             .first::<UserTable>(&*(self.db_connection()?))?;
 
         let _ = self.read_user_profile_on_server(&token)?;
-        let _ = self.start_ws_connection(&token)?;
-
         Ok(UserProfile::from(user))
     }
 

rust-lib/flowy-workspace/src/entities/view/view_update.rs

@@ -3,7 +3,7 @@ use crate::{
     errors::WorkspaceError,
 };
 use flowy_derive::ProtoBuf;
-use flowy_document::entities::doc::{DocDelta, UpdateDocParams};
+use flowy_document::entities::doc::DocDelta;
 use std::convert::TryInto;
 
 #[derive(Default, ProtoBuf)]
@@ -100,28 +100,6 @@ impl TryInto<UpdateViewParams> for UpdateViewRequest {
     }
 }
 
-#[derive(Default, ProtoBuf)]
-pub struct SaveViewDataRequest {
-    #[pb(index = 1)]
-    pub view_id: String,
-
-    #[pb(index = 2)]
-    pub data: Vec<u8>,
-}
-
-impl TryInto<UpdateDocParams> for SaveViewDataRequest {
-    type Error = WorkspaceError;
-
-    fn try_into(self) -> Result<UpdateDocParams, Self::Error> {
-        let view_id = ViewId::parse(self.view_id).map_err(|e| WorkspaceError::view_id().context(e))?.0;
-
-        // Opti: Vec<u8> -> Delta -> Vec<u8>
-        let data = DeltaData::parse(self.data).map_err(|e| WorkspaceError::view_data().context(e))?.0;
-
-        Ok(UpdateDocParams { doc_id: view_id, data })
-    }
-}
-
 #[derive(Default, ProtoBuf)]
 pub struct ApplyChangesetRequest {
     #[pb(index = 1)]

rust-lib/flowy-workspace/src/protobuf/model/view_update.rs

@@ -943,207 +943,6 @@ impl ::protobuf::reflect::ProtobufValue for UpdateViewParams {
     }
 }
 
-#[derive(PartialEq,Clone,Default)]
-pub struct SaveViewDataRequest {
-    // message fields
-    pub view_id: ::std::string::String,
-    pub data: ::std::vec::Vec<u8>,
-    // special fields
-    pub unknown_fields: ::protobuf::UnknownFields,
-    pub cached_size: ::protobuf::CachedSize,
-}
-
-impl<'a> ::std::default::Default for &'a SaveViewDataRequest {
-    fn default() -> &'a SaveViewDataRequest {
-        <SaveViewDataRequest as ::protobuf::Message>::default_instance()
-    }
-}
-
-impl SaveViewDataRequest {
-    pub fn new() -> SaveViewDataRequest {
-        ::std::default::Default::default()
-    }
-
-    // string view_id = 1;
-
-
-    pub fn get_view_id(&self) -> &str {
-        &self.view_id
-    }
-    pub fn clear_view_id(&mut self) {
-        self.view_id.clear();
-    }
-
-    // Param is passed by value, moved
-    pub fn set_view_id(&mut self, v: ::std::string::String) {
-        self.view_id = v;
-    }
-
-    // Mutable pointer to the field.
-    // If field is not initialized, it is initialized with default value first.
-    pub fn mut_view_id(&mut self) -> &mut ::std::string::String {
-        &mut self.view_id
-    }
-
-    // Take field
-    pub fn take_view_id(&mut self) -> ::std::string::String {
-        ::std::mem::replace(&mut self.view_id, ::std::string::String::new())
-    }
-
-    // bytes data = 2;
-
-
-    pub fn get_data(&self) -> &[u8] {
-        &self.data
-    }
-    pub fn clear_data(&mut self) {
-        self.data.clear();
-    }
-
-    // Param is passed by value, moved
-    pub fn set_data(&mut self, v: ::std::vec::Vec<u8>) {
-        self.data = v;
-    }
-
-    // Mutable pointer to the field.
-    // If field is not initialized, it is initialized with default value first.
-    pub fn mut_data(&mut self) -> &mut ::std::vec::Vec<u8> {
-        &mut self.data
-    }
-
-    // Take field
-    pub fn take_data(&mut self) -> ::std::vec::Vec<u8> {
-        ::std::mem::replace(&mut self.data, ::std::vec::Vec::new())
-    }
-}
-
-impl ::protobuf::Message for SaveViewDataRequest {
-    fn is_initialized(&self) -> bool {
-        true
-    }
-
-    fn merge_from(&mut self, is: &mut ::protobuf::CodedInputStream<'_>) -> ::protobuf::ProtobufResult<()> {
-        while !is.eof()? {
-            let (field_number, wire_type) = is.read_tag_unpack()?;
-            match field_number {
-                1 => {
-                    ::protobuf::rt::read_singular_proto3_string_into(wire_type, is, &mut self.view_id)?;
-                },
-                2 => {
-                    ::protobuf::rt::read_singular_proto3_bytes_into(wire_type, is, &mut self.data)?;
-                },
-                _ => {
-                    ::protobuf::rt::read_unknown_or_skip_group(field_number, wire_type, is, self.mut_unknown_fields())?;
-                },
-            };
-        }
-        ::std::result::Result::Ok(())
-    }
-
-    // Compute sizes of nested messages
-    #[allow(unused_variables)]
-    fn compute_size(&self) -> u32 {
-        let mut my_size = 0;
-        if !self.view_id.is_empty() {
-            my_size += ::protobuf::rt::string_size(1, &self.view_id);
-        }
-        if !self.data.is_empty() {
-            my_size += ::protobuf::rt::bytes_size(2, &self.data);
-        }
-        my_size += ::protobuf::rt::unknown_fields_size(self.get_unknown_fields());
-        self.cached_size.set(my_size);
-        my_size
-    }
-
-    fn write_to_with_cached_sizes(&self, os: &mut ::protobuf::CodedOutputStream<'_>) -> ::protobuf::ProtobufResult<()> {
-        if !self.view_id.is_empty() {
-            os.write_string(1, &self.view_id)?;
-        }
-        if !self.data.is_empty() {
-            os.write_bytes(2, &self.data)?;
-        }
-        os.write_unknown_fields(self.get_unknown_fields())?;
-        ::std::result::Result::Ok(())
-    }
-
-    fn get_cached_size(&self) -> u32 {
-        self.cached_size.get()
-    }
-
-    fn get_unknown_fields(&self) -> &::protobuf::UnknownFields {
-        &self.unknown_fields
-    }
-
-    fn mut_unknown_fields(&mut self) -> &mut ::protobuf::UnknownFields {
-        &mut self.unknown_fields
-    }
-
-    fn as_any(&self) -> &dyn (::std::any::Any) {
-        self as &dyn (::std::any::Any)
-    }
-    fn as_any_mut(&mut self) -> &mut dyn (::std::any::Any) {
-        self as &mut dyn (::std::any::Any)
-    }
-    fn into_any(self: ::std::boxed::Box<Self>) -> ::std::boxed::Box<dyn (::std::any::Any)> {
-        self
-    }
-
-    fn descriptor(&self) -> &'static ::protobuf::reflect::MessageDescriptor {
-        Self::descriptor_static()
-    }
-
-    fn new() -> SaveViewDataRequest {
-        SaveViewDataRequest::new()
-    }
-
-    fn descriptor_static() -> &'static ::protobuf::reflect::MessageDescriptor {
-        static descriptor: ::protobuf::rt::LazyV2<::protobuf::reflect::MessageDescriptor> = ::protobuf::rt::LazyV2::INIT;
-        descriptor.get(|| {
-            let mut fields = ::std::vec::Vec::new();
-            fields.push(::protobuf::reflect::accessor::make_simple_field_accessor::<_, ::protobuf::types::ProtobufTypeString>(
-                "view_id",
-                |m: &SaveViewDataRequest| { &m.view_id },
-                |m: &mut SaveViewDataRequest| { &mut m.view_id },
-            ));
-            fields.push(::protobuf::reflect::accessor::make_simple_field_accessor::<_, ::protobuf::types::ProtobufTypeBytes>(
-                "data",
-                |m: &SaveViewDataRequest| { &m.data },
-                |m: &mut SaveViewDataRequest| { &mut m.data },
-            ));
-            ::protobuf::reflect::MessageDescriptor::new_pb_name::<SaveViewDataRequest>(
-                "SaveViewDataRequest",
-                fields,
-                file_descriptor_proto()
-            )
-        })
-    }
-
-    fn default_instance() -> &'static SaveViewDataRequest {
-        static instance: ::protobuf::rt::LazyV2<SaveViewDataRequest> = ::protobuf::rt::LazyV2::INIT;
-        instance.get(SaveViewDataRequest::new)
-    }
-}
-
-impl ::protobuf::Clear for SaveViewDataRequest {
-    fn clear(&mut self) {
-        self.view_id.clear();
-        self.data.clear();
-        self.unknown_fields.clear();
-    }
-}
-
-impl ::std::fmt::Debug for SaveViewDataRequest {
-    fn fmt(&self, f: &mut ::std::fmt::Formatter<'_>) -> ::std::fmt::Result {
-        ::protobuf::text_format::fmt(self, f)
-    }
-}
-
-impl ::protobuf::reflect::ProtobufValue for SaveViewDataRequest {
-    fn as_ref(&self) -> ::protobuf::reflect::ReflectValueRef {
-        ::protobuf::reflect::ReflectValueRef::Message(self)
-    }
-}
-
 #[derive(PartialEq,Clone,Default)]
 pub struct ApplyChangesetRequest {
     // message fields
@@ -1357,64 +1156,55 @@ static file_descriptor_proto_data: &'static [u8] = b"\
     \x03\x20\x01(\tH\x01R\x04desc\x12\x1e\n\tthumbnail\x18\x04\x20\x01(\tH\
     \x02R\tthumbnail\x12\x1b\n\x08is_trash\x18\x05\x20\x01(\x08H\x03R\x07isT\
     rashB\r\n\x0bone_of_nameB\r\n\x0bone_of_descB\x12\n\x10one_of_thumbnailB\
-    \x11\n\x0fone_of_is_trash\"B\n\x13SaveViewDataRequest\x12\x17\n\x07view_\
-    id\x18\x01\x20\x01(\tR\x06viewId\x12\x12\n\x04data\x18\x02\x20\x01(\x0cR\
-    \x04data\"D\n\x15ApplyChangesetRequest\x12\x17\n\x07view_id\x18\x01\x20\
-    \x01(\tR\x06viewId\x12\x12\n\x04data\x18\x02\x20\x01(\x0cR\x04dataJ\xcc\
-    \x08\n\x06\x12\x04\0\0\x17\x01\n\x08\n\x01\x0c\x12\x03\0\0\x12\n\n\n\x02\
-    \x04\0\x12\x04\x02\0\x08\x01\n\n\n\x03\x04\0\x01\x12\x03\x02\x08\x19\n\
-    \x0b\n\x04\x04\0\x02\0\x12\x03\x03\x04\x17\n\x0c\n\x05\x04\0\x02\0\x05\
-    \x12\x03\x03\x04\n\n\x0c\n\x05\x04\0\x02\0\x01\x12\x03\x03\x0b\x12\n\x0c\
-    \n\x05\x04\0\x02\0\x03\x12\x03\x03\x15\x16\n\x0b\n\x04\x04\0\x08\0\x12\
-    \x03\x04\x04*\n\x0c\n\x05\x04\0\x08\0\x01\x12\x03\x04\n\x15\n\x0b\n\x04\
-    \x04\0\x02\x01\x12\x03\x04\x18(\n\x0c\n\x05\x04\0\x02\x01\x05\x12\x03\
-    \x04\x18\x1e\n\x0c\n\x05\x04\0\x02\x01\x01\x12\x03\x04\x1f#\n\x0c\n\x05\
-    \x04\0\x02\x01\x03\x12\x03\x04&'\n\x0b\n\x04\x04\0\x08\x01\x12\x03\x05\
-    \x04*\n\x0c\n\x05\x04\0\x08\x01\x01\x12\x03\x05\n\x15\n\x0b\n\x04\x04\0\
-    \x02\x02\x12\x03\x05\x18(\n\x0c\n\x05\x04\0\x02\x02\x05\x12\x03\x05\x18\
-    \x1e\n\x0c\n\x05\x04\0\x02\x02\x01\x12\x03\x05\x1f#\n\x0c\n\x05\x04\0\
-    \x02\x02\x03\x12\x03\x05&'\n\x0b\n\x04\x04\0\x08\x02\x12\x03\x06\x044\n\
-    \x0c\n\x05\x04\0\x08\x02\x01\x12\x03\x06\n\x1a\n\x0b\n\x04\x04\0\x02\x03\
-    \x12\x03\x06\x1d2\n\x0c\n\x05\x04\0\x02\x03\x05\x12\x03\x06\x1d#\n\x0c\n\
-    \x05\x04\0\x02\x03\x01\x12\x03\x06$-\n\x0c\n\x05\x04\0\x02\x03\x03\x12\
-    \x03\x0601\n\x0b\n\x04\x04\0\x08\x03\x12\x03\x07\x040\n\x0c\n\x05\x04\0\
-    \x08\x03\x01\x12\x03\x07\n\x19\n\x0b\n\x04\x04\0\x02\x04\x12\x03\x07\x1c\
-    .\n\x0c\n\x05\x04\0\x02\x04\x05\x12\x03\x07\x1c\x20\n\x0c\n\x05\x04\0\
-    \x02\x04\x01\x12\x03\x07!)\n\x0c\n\x05\x04\0\x02\x04\x03\x12\x03\x07,-\n\
-    \n\n\x02\x04\x01\x12\x04\t\0\x0f\x01\n\n\n\x03\x04\x01\x01\x12\x03\t\x08\
-    \x18\n\x0b\n\x04\x04\x01\x02\0\x12\x03\n\x04\x17\n\x0c\n\x05\x04\x01\x02\
-    \0\x05\x12\x03\n\x04\n\n\x0c\n\x05\x04\x01\x02\0\x01\x12\x03\n\x0b\x12\n\
-    \x0c\n\x05\x04\x01\x02\0\x03\x12\x03\n\x15\x16\n\x0b\n\x04\x04\x01\x08\0\
-    \x12\x03\x0b\x04*\n\x0c\n\x05\x04\x01\x08\0\x01\x12\x03\x0b\n\x15\n\x0b\
-    \n\x04\x04\x01\x02\x01\x12\x03\x0b\x18(\n\x0c\n\x05\x04\x01\x02\x01\x05\
-    \x12\x03\x0b\x18\x1e\n\x0c\n\x05\x04\x01\x02\x01\x01\x12\x03\x0b\x1f#\n\
-    \x0c\n\x05\x04\x01\x02\x01\x03\x12\x03\x0b&'\n\x0b\n\x04\x04\x01\x08\x01\
-    \x12\x03\x0c\x04*\n\x0c\n\x05\x04\x01\x08\x01\x01\x12\x03\x0c\n\x15\n\
-    \x0b\n\x04\x04\x01\x02\x02\x12\x03\x0c\x18(\n\x0c\n\x05\x04\x01\x02\x02\
-    \x05\x12\x03\x0c\x18\x1e\n\x0c\n\x05\x04\x01\x02\x02\x01\x12\x03\x0c\x1f\
-    #\n\x0c\n\x05\x04\x01\x02\x02\x03\x12\x03\x0c&'\n\x0b\n\x04\x04\x01\x08\
-    \x02\x12\x03\r\x044\n\x0c\n\x05\x04\x01\x08\x02\x01\x12\x03\r\n\x1a\n\
-    \x0b\n\x04\x04\x01\x02\x03\x12\x03\r\x1d2\n\x0c\n\x05\x04\x01\x02\x03\
-    \x05\x12\x03\r\x1d#\n\x0c\n\x05\x04\x01\x02\x03\x01\x12\x03\r$-\n\x0c\n\
-    \x05\x04\x01\x02\x03\x03\x12\x03\r01\n\x0b\n\x04\x04\x01\x08\x03\x12\x03\
-    \x0e\x040\n\x0c\n\x05\x04\x01\x08\x03\x01\x12\x03\x0e\n\x19\n\x0b\n\x04\
-    \x04\x01\x02\x04\x12\x03\x0e\x1c.\n\x0c\n\x05\x04\x01\x02\x04\x05\x12\
-    \x03\x0e\x1c\x20\n\x0c\n\x05\x04\x01\x02\x04\x01\x12\x03\x0e!)\n\x0c\n\
-    \x05\x04\x01\x02\x04\x03\x12\x03\x0e,-\n\n\n\x02\x04\x02\x12\x04\x10\0\
-    \x13\x01\n\n\n\x03\x04\x02\x01\x12\x03\x10\x08\x1b\n\x0b\n\x04\x04\x02\
-    \x02\0\x12\x03\x11\x04\x17\n\x0c\n\x05\x04\x02\x02\0\x05\x12\x03\x11\x04\
-    \n\n\x0c\n\x05\x04\x02\x02\0\x01\x12\x03\x11\x0b\x12\n\x0c\n\x05\x04\x02\
-    \x02\0\x03\x12\x03\x11\x15\x16\n\x0b\n\x04\x04\x02\x02\x01\x12\x03\x12\
-    \x04\x13\n\x0c\n\x05\x04\x02\x02\x01\x05\x12\x03\x12\x04\t\n\x0c\n\x05\
-    \x04\x02\x02\x01\x01\x12\x03\x12\n\x0e\n\x0c\n\x05\x04\x02\x02\x01\x03\
-    \x12\x03\x12\x11\x12\n\n\n\x02\x04\x03\x12\x04\x14\0\x17\x01\n\n\n\x03\
-    \x04\x03\x01\x12\x03\x14\x08\x1d\n\x0b\n\x04\x04\x03\x02\0\x12\x03\x15\
-    \x04\x17\n\x0c\n\x05\x04\x03\x02\0\x05\x12\x03\x15\x04\n\n\x0c\n\x05\x04\
-    \x03\x02\0\x01\x12\x03\x15\x0b\x12\n\x0c\n\x05\x04\x03\x02\0\x03\x12\x03\
-    \x15\x15\x16\n\x0b\n\x04\x04\x03\x02\x01\x12\x03\x16\x04\x13\n\x0c\n\x05\
-    \x04\x03\x02\x01\x05\x12\x03\x16\x04\t\n\x0c\n\x05\x04\x03\x02\x01\x01\
-    \x12\x03\x16\n\x0e\n\x0c\n\x05\x04\x03\x02\x01\x03\x12\x03\x16\x11\x12b\
-    \x06proto3\
+    \x11\n\x0fone_of_is_trash\"D\n\x15ApplyChangesetRequest\x12\x17\n\x07vie\
+    w_id\x18\x01\x20\x01(\tR\x06viewId\x12\x12\n\x04data\x18\x02\x20\x01(\
+    \x0cR\x04dataJ\xc6\x07\n\x06\x12\x04\0\0\x13\x01\n\x08\n\x01\x0c\x12\x03\
+    \0\0\x12\n\n\n\x02\x04\0\x12\x04\x02\0\x08\x01\n\n\n\x03\x04\0\x01\x12\
+    \x03\x02\x08\x19\n\x0b\n\x04\x04\0\x02\0\x12\x03\x03\x04\x17\n\x0c\n\x05\
+    \x04\0\x02\0\x05\x12\x03\x03\x04\n\n\x0c\n\x05\x04\0\x02\0\x01\x12\x03\
+    \x03\x0b\x12\n\x0c\n\x05\x04\0\x02\0\x03\x12\x03\x03\x15\x16\n\x0b\n\x04\
+    \x04\0\x08\0\x12\x03\x04\x04*\n\x0c\n\x05\x04\0\x08\0\x01\x12\x03\x04\n\
+    \x15\n\x0b\n\x04\x04\0\x02\x01\x12\x03\x04\x18(\n\x0c\n\x05\x04\0\x02\
+    \x01\x05\x12\x03\x04\x18\x1e\n\x0c\n\x05\x04\0\x02\x01\x01\x12\x03\x04\
+    \x1f#\n\x0c\n\x05\x04\0\x02\x01\x03\x12\x03\x04&'\n\x0b\n\x04\x04\0\x08\
+    \x01\x12\x03\x05\x04*\n\x0c\n\x05\x04\0\x08\x01\x01\x12\x03\x05\n\x15\n\
+    \x0b\n\x04\x04\0\x02\x02\x12\x03\x05\x18(\n\x0c\n\x05\x04\0\x02\x02\x05\
+    \x12\x03\x05\x18\x1e\n\x0c\n\x05\x04\0\x02\x02\x01\x12\x03\x05\x1f#\n\
+    \x0c\n\x05\x04\0\x02\x02\x03\x12\x03\x05&'\n\x0b\n\x04\x04\0\x08\x02\x12\
+    \x03\x06\x044\n\x0c\n\x05\x04\0\x08\x02\x01\x12\x03\x06\n\x1a\n\x0b\n\
+    \x04\x04\0\x02\x03\x12\x03\x06\x1d2\n\x0c\n\x05\x04\0\x02\x03\x05\x12\
+    \x03\x06\x1d#\n\x0c\n\x05\x04\0\x02\x03\x01\x12\x03\x06$-\n\x0c\n\x05\
+    \x04\0\x02\x03\x03\x12\x03\x0601\n\x0b\n\x04\x04\0\x08\x03\x12\x03\x07\
+    \x040\n\x0c\n\x05\x04\0\x08\x03\x01\x12\x03\x07\n\x19\n\x0b\n\x04\x04\0\
+    \x02\x04\x12\x03\x07\x1c.\n\x0c\n\x05\x04\0\x02\x04\x05\x12\x03\x07\x1c\
+    \x20\n\x0c\n\x05\x04\0\x02\x04\x01\x12\x03\x07!)\n\x0c\n\x05\x04\0\x02\
+    \x04\x03\x12\x03\x07,-\n\n\n\x02\x04\x01\x12\x04\t\0\x0f\x01\n\n\n\x03\
+    \x04\x01\x01\x12\x03\t\x08\x18\n\x0b\n\x04\x04\x01\x02\0\x12\x03\n\x04\
+    \x17\n\x0c\n\x05\x04\x01\x02\0\x05\x12\x03\n\x04\n\n\x0c\n\x05\x04\x01\
+    \x02\0\x01\x12\x03\n\x0b\x12\n\x0c\n\x05\x04\x01\x02\0\x03\x12\x03\n\x15\
+    \x16\n\x0b\n\x04\x04\x01\x08\0\x12\x03\x0b\x04*\n\x0c\n\x05\x04\x01\x08\
+    \0\x01\x12\x03\x0b\n\x15\n\x0b\n\x04\x04\x01\x02\x01\x12\x03\x0b\x18(\n\
+    \x0c\n\x05\x04\x01\x02\x01\x05\x12\x03\x0b\x18\x1e\n\x0c\n\x05\x04\x01\
+    \x02\x01\x01\x12\x03\x0b\x1f#\n\x0c\n\x05\x04\x01\x02\x01\x03\x12\x03\
+    \x0b&'\n\x0b\n\x04\x04\x01\x08\x01\x12\x03\x0c\x04*\n\x0c\n\x05\x04\x01\
+    \x08\x01\x01\x12\x03\x0c\n\x15\n\x0b\n\x04\x04\x01\x02\x02\x12\x03\x0c\
+    \x18(\n\x0c\n\x05\x04\x01\x02\x02\x05\x12\x03\x0c\x18\x1e\n\x0c\n\x05\
+    \x04\x01\x02\x02\x01\x12\x03\x0c\x1f#\n\x0c\n\x05\x04\x01\x02\x02\x03\
+    \x12\x03\x0c&'\n\x0b\n\x04\x04\x01\x08\x02\x12\x03\r\x044\n\x0c\n\x05\
+    \x04\x01\x08\x02\x01\x12\x03\r\n\x1a\n\x0b\n\x04\x04\x01\x02\x03\x12\x03\
+    \r\x1d2\n\x0c\n\x05\x04\x01\x02\x03\x05\x12\x03\r\x1d#\n\x0c\n\x05\x04\
+    \x01\x02\x03\x01\x12\x03\r$-\n\x0c\n\x05\x04\x01\x02\x03\x03\x12\x03\r01\
+    \n\x0b\n\x04\x04\x01\x08\x03\x12\x03\x0e\x040\n\x0c\n\x05\x04\x01\x08\
+    \x03\x01\x12\x03\x0e\n\x19\n\x0b\n\x04\x04\x01\x02\x04\x12\x03\x0e\x1c.\
+    \n\x0c\n\x05\x04\x01\x02\x04\x05\x12\x03\x0e\x1c\x20\n\x0c\n\x05\x04\x01\
+    \x02\x04\x01\x12\x03\x0e!)\n\x0c\n\x05\x04\x01\x02\x04\x03\x12\x03\x0e,-\
+    \n\n\n\x02\x04\x02\x12\x04\x10\0\x13\x01\n\n\n\x03\x04\x02\x01\x12\x03\
+    \x10\x08\x1d\n\x0b\n\x04\x04\x02\x02\0\x12\x03\x11\x04\x17\n\x0c\n\x05\
+    \x04\x02\x02\0\x05\x12\x03\x11\x04\n\n\x0c\n\x05\x04\x02\x02\0\x01\x12\
+    \x03\x11\x0b\x12\n\x0c\n\x05\x04\x02\x02\0\x03\x12\x03\x11\x15\x16\n\x0b\
+    \n\x04\x04\x02\x02\x01\x12\x03\x12\x04\x13\n\x0c\n\x05\x04\x02\x02\x01\
+    \x05\x12\x03\x12\x04\t\n\x0c\n\x05\x04\x02\x02\x01\x01\x12\x03\x12\n\x0e\
+    \n\x0c\n\x05\x04\x02\x02\x01\x03\x12\x03\x12\x11\x12b\x06proto3\
 ";
 
 static file_descriptor_proto_lazy: ::protobuf::rt::LazyV2<::protobuf::descriptor::FileDescriptorProto> = ::protobuf::rt::LazyV2::INIT;

rust-lib/flowy-workspace/src/protobuf/proto/view_update.proto

@@ -14,10 +14,6 @@ message UpdateViewParams {
     oneof one_of_thumbnail { string thumbnail = 4; };
     oneof one_of_is_trash { bool is_trash = 5; };
 }
-message SaveViewDataRequest {
-    string view_id = 1;
-    bytes data = 2;
-}
 message ApplyChangesetRequest {
     string view_id = 1;
     bytes data = 2;

rust-lib/flowy-workspace/src/services/view_controller.rs

@@ -126,8 +126,7 @@ impl ViewController {
     }
 
     pub(crate) async fn apply_doc_delta(&self, params: DocDelta) -> Result<Doc, WorkspaceError> {
-        let pool = self.database.db_pool()?;
-        let doc = self.document.apply_doc_delta(params, pool).await?;
+        let doc = self.document.apply_doc_delta(params).await?;
         Ok(doc)
     }
 }

rust-lib/flowy-ws/src/msg.rs

@@ -1,8 +1,7 @@
-use crate::errors::WsError;
 use bytes::Bytes;
 use flowy_derive::{ProtoBuf, ProtoBuf_Enum};
 use std::convert::{TryFrom, TryInto};
-use tokio_tungstenite::tungstenite::{Message as TokioMessage, Message};
+use tokio_tungstenite::tungstenite::Message as TokioMessage;
 
 // Opti: using four bytes of the data to represent the source
 #[derive(ProtoBuf, Debug, Clone, Default)]

rust-lib/flowy-ws/src/ws.rs

@@ -11,7 +11,7 @@ use futures_core::{future::BoxFuture, ready, Stream};
 use pin_project::pin_project;
 use std::{
     collections::HashMap,
-    convert::{Infallible, TryFrom},
+    convert::TryFrom,
     future::Future,
     pin::Pin,
     sync::Arc,