feat: support leaving workspace (#5007)

frontend/appflowy_flutter/lib/shared/af_role_pb_extension.dart

@@ -5,12 +5,16 @@ import 'package:easy_localization/easy_localization.dart';
 extension AFRolePBExtension on AFRolePB {
   bool get isOwner => this == AFRolePB.Owner;
 
+  bool get isMember => this == AFRolePB.Member;
+
   bool get canInvite => isOwner;
 
   bool get canDelete => isOwner;
 
   bool get canUpdate => isOwner;
 
+  bool get canLeave => this != AFRolePB.Owner;
+
   String get description {
     switch (this) {
       case AFRolePB.Owner:

frontend/appflowy_flutter/lib/user/application/user_service.dart

@@ -190,4 +190,11 @@ class UserBackendService {
       ..role = role;
     return UserEventUpdateWorkspaceMember(data).send();
   }
+
+  Future<FlowyResult<void, FlowyError>> leaveWorkspace(
+    String workspaceId,
+  ) async {
+    final data = UserWorkspaceIdPB.create()..workspaceId = workspaceId;
+    return UserEventLeaveWorkspace(data).send();
+  }
 }

frontend/appflowy_flutter/lib/workspace/application/user/user_workspace_bloc.dart

@@ -218,6 +218,30 @@ class UserWorkspaceBloc extends Bloc<UserWorkspaceEvent, UserWorkspaceState> {
               ),
             );
           },
+          leaveWorkspace: (workspaceId) async {
+            final result = await _userService.leaveWorkspace(workspaceId);
+            final workspaces = result.fold(
+              (s) => state.workspaces
+                  .where((e) => e.workspaceId != workspaceId)
+                  .toList(),
+              (e) => state.workspaces,
+            );
+            result.onSuccess((_) {
+              // if leaving the current workspace, open the first workspace
+              if (state.currentWorkspace?.workspaceId == workspaceId) {
+                add(OpenWorkspace(workspaces.first.workspaceId));
+              }
+            });
+            emit(
+              state.copyWith(
+                workspaces: workspaces,
+                actionResult: UserWorkspaceActionResult(
+                  actionType: UserWorkspaceActionType.leave,
+                  result: result,
+                ),
+              ),
+            );
+          },
         );
       },
     );
@@ -270,6 +294,8 @@ class UserWorkspaceEvent with _$UserWorkspaceEvent {
     String workspaceId,
     String icon,
   ) = _UpdateWorkspaceIcon;
+  const factory UserWorkspaceEvent.leaveWorkspace(String workspaceId) =
+      LeaveWorkspace;
 }
 
 enum UserWorkspaceActionType {
@@ -279,7 +305,8 @@ enum UserWorkspaceActionType {
   open,
   rename,
   updateIcon,
-  fetchWorkspaces;
+  fetchWorkspaces,
+  leave;
 }
 
 class UserWorkspaceActionResult {

frontend/appflowy_flutter/lib/workspace/presentation/home/menu/sidebar/sidebar_workspace.dart

@@ -112,6 +112,7 @@ class SidebarWorkspace extends StatelessWidget {
         break;
       case UserWorkspaceActionType.none:
       case UserWorkspaceActionType.fetchWorkspaces:
+      case UserWorkspaceActionType.leave:
         message = null;
         break;
     }

frontend/appflowy_flutter/lib/workspace/presentation/home/menu/sidebar/workspace/_sidebar_workspace_actions.dart

@@ -1,6 +1,8 @@
 import 'package:appflowy/generated/flowy_svgs.g.dart';
 import 'package:appflowy/generated/locale_keys.g.dart';
+import 'package:appflowy/shared/af_role_pb_extension.dart';
 import 'package:appflowy/workspace/application/user/user_workspace_bloc.dart';
+import 'package:appflowy/workspace/presentation/settings/widgets/members/workspace_member_bloc.dart';
 import 'package:appflowy/workspace/presentation/widgets/dialogs.dart';
 import 'package:appflowy/workspace/presentation/widgets/pop_up_action.dart';
 import 'package:appflowy_backend/protobuf/flowy-user/protobuf.dart';
@@ -13,6 +15,7 @@ import 'package:flutter_bloc/flutter_bloc.dart';
 enum WorkspaceMoreAction {
   rename,
   delete,
+  leave,
 }
 
 class WorkspaceMoreActionList extends StatelessWidget {
@@ -25,9 +28,20 @@ class WorkspaceMoreActionList extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final myRole = context.read<WorkspaceMemberBloc>().state.myRole;
+    final actions = [];
+    if (myRole.isOwner) {
+      actions.add(WorkspaceMoreAction.rename);
+      actions.add(WorkspaceMoreAction.delete);
+    } else if (myRole.canLeave) {
+      actions.add(WorkspaceMoreAction.leave);
+    }
+    if (actions.isEmpty) {
+      return const SizedBox.shrink();
+    }
     return PopoverActionList<_WorkspaceMoreActionWrapper>(
       direction: PopoverDirection.bottomWithCenterAligned,
-      actions: WorkspaceMoreAction.values
+      actions: actions
           .map((e) => _WorkspaceMoreActionWrapper(e, workspace))
           .toList(),
       buildChild: (controller) {
@@ -92,6 +106,20 @@ class _WorkspaceMoreActionWrapper extends CustomActionCell {
                 );
               },
             ).show(context);
+          case WorkspaceMoreAction.leave:
+            await showDialog(
+              context: context,
+              builder: (_) => NavigatorOkCancelDialog(
+                title: LocaleKeys.workspace_leaveCurrentWorkspace.tr(),
+                message: LocaleKeys.workspace_leaveCurrentWorkspacePrompt.tr(),
+                onOkPressed: () {
+                  workspaceBloc.add(
+                    UserWorkspaceEvent.leaveWorkspace(workspace.workspaceId),
+                  );
+                },
+                okTitle: LocaleKeys.button_yes.tr(),
+              ),
+            );
         }
       },
     );
@@ -103,6 +131,8 @@ class _WorkspaceMoreActionWrapper extends CustomActionCell {
         return LocaleKeys.button_delete.tr();
       case WorkspaceMoreAction.rename:
         return LocaleKeys.button_rename.tr();
+      case WorkspaceMoreAction.leave:
+        return LocaleKeys.workspace_leaveCurrentWorkspace.tr();
     }
   }
 }

frontend/appflowy_flutter/lib/workspace/presentation/home/menu/sidebar/workspace/_sidebar_workspace_menu.dart

@@ -1,6 +1,5 @@
 import 'package:appflowy/generated/flowy_svgs.g.dart';
 import 'package:appflowy/generated/locale_keys.g.dart';
-import 'package:appflowy/shared/af_role_pb_extension.dart';
 import 'package:appflowy/workspace/application/user/user_workspace_bloc.dart';
 import 'package:appflowy/workspace/presentation/home/menu/sidebar/workspace/_sidebar_workspace_actions.dart';
 import 'package:appflowy/workspace/presentation/home/menu/sidebar/workspace/_sidebar_workspace_icon.dart';
@@ -201,8 +200,7 @@ class WorkspaceMenuItem extends StatelessWidget {
 
     return Row(
       children: [
-        if (context.read<WorkspaceMemberBloc>().state.myRole.isOwner)
-          WorkspaceMoreActionList(workspace: workspace),
+        WorkspaceMoreActionList(workspace: workspace),
         const FlowySvg(
           FlowySvgs.blue_check_s,
         ),

frontend/resources/translations/en.json

@@ -79,7 +79,9 @@
     "updateIconSuccess": "Updated workspace icon successfully",
     "updateIconFailed": "Updated workspace icon failed",
     "cannotDeleteTheOnlyWorkspace": "Cannot delete the only workspace",
-    "fetchWorkspacesFailed": "Failed to fetch workspaces"
+    "fetchWorkspacesFailed": "Failed to fetch workspaces",
+    "leaveCurrentWorkspace": "Leave workspace",
+    "leaveCurrentWorkspacePrompt": "Are you sure you want to leave the current workspace?"
   },
   "shareAction": {
     "buttonText": "Share",