Change Channel.GetChannelUnread to sync (#10804)

* Change Channel.GetChannelUnread to sync

* Address comments

app/channel.go

@@ -1342,11 +1342,10 @@ func (a *App) GetChannelCounts(teamId string, userId string) (*model.ChannelCoun
 }
 
 func (a *App) GetChannelUnread(channelId, userId string) (*model.ChannelUnread, *model.AppError) {
-	result := <-a.Srv.Store.Channel().GetChannelUnread(channelId, userId)
+	channelUnread, err := a.Srv.Store.Channel().GetChannelUnread(channelId, userId)
-	if result.Err != nil {
+	if err != nil {
-		return nil, result.Err
+		return nil, err
 	}
-	channelUnread := result.Data.(*model.ChannelUnread)
 
 	if channelUnread.NotifyProps[model.MARK_UNREAD_NOTIFY_PROP] == model.CHANNEL_MARK_UNREAD_MENTION {
 		channelUnread.MsgCount = 0

store/sqlstore/channel_store.go

@@ -682,8 +682,7 @@ func (s SqlChannelStore) updateChannelT(transaction *gorp.Transaction, channel *
 	return result
 }
 
-func (s SqlChannelStore) GetChannelUnread(channelId, userId string) store.StoreChannel {
+func (s SqlChannelStore) GetChannelUnread(channelId, userId string) (*model.ChannelUnread, *model.AppError) {
-	return store.Do(func(result *store.StoreResult) {
 	var unreadChannel model.ChannelUnread
 	err := s.GetReplica().SelectOne(&unreadChannel,
 		`SELECT
@@ -698,14 +697,12 @@ func (s SqlChannelStore) GetChannelUnread(channelId, userId string) store.StoreC
 		map[string]interface{}{"ChannelId": channelId, "UserId": userId})
 
 	if err != nil {
-			result.Err = model.NewAppError("SqlChannelStore.GetChannelUnread", "store.sql_channel.get_unread.app_error", nil, "channelId="+channelId+" "+err.Error(), http.StatusInternalServerError)
 		if err == sql.ErrNoRows {
-				result.Err.StatusCode = http.StatusNotFound
+			return nil, model.NewAppError("SqlChannelStore.GetChannelUnread", "store.sql_channel.get_unread.app_error", nil, "channelId="+channelId+" "+err.Error(), http.StatusNotFound)
 		}
-		} else {
+		return nil, model.NewAppError("SqlChannelStore.GetChannelUnread", "store.sql_channel.get_unread.app_error", nil, "channelId="+channelId+" "+err.Error(), http.StatusInternalServerError)
-			result.Data = &unreadChannel
 	}
-	})
+	return &unreadChannel, nil
 }
 
 func (s SqlChannelStore) InvalidateChannel(id string) {

store/store.go

@@ -188,7 +188,7 @@ type ChannelStore interface {
 	SearchMore(userId string, teamId string, term string) StoreChannel
 	GetMembersByIds(channelId string, userIds []string) StoreChannel
 	AnalyticsDeletedTypeCount(teamId string, channelType string) StoreChannel
-	GetChannelUnread(channelId, userId string) StoreChannel
+	GetChannelUnread(channelId, userId string) (*model.ChannelUnread, *model.AppError)
 	ClearCaches()
 	GetChannelsByScheme(schemeId string, offset int, limit int) StoreChannel
 	MigrateChannelMembers(fromChannelId string, fromUserId string) StoreChannel

store/storetest/channel_store.go

@@ -301,10 +301,9 @@ func testGetChannelUnread(t *testing.T, ss store.Store) {
 	store.Must(ss.Channel().SaveMember(cm2))
 
 	// Check for Channel 1
-	if resp := <-ss.Channel().GetChannelUnread(c1.Id, uid); resp.Err != nil {
+	if ch, err := ss.Channel().GetChannelUnread(c1.Id, uid); err != nil {
-		t.Fatal(resp.Err)
+		t.Fatal(err)
 	} else {
-		ch := resp.Data.(*model.ChannelUnread)
 		if c1.Id != ch.ChannelId {
 			t.Fatal("wrong channel id")
 		}
@@ -327,10 +326,9 @@ func testGetChannelUnread(t *testing.T, ss store.Store) {
 	}
 
 	// Check for Channel 2
-	if resp2 := <-ss.Channel().GetChannelUnread(c2.Id, uid); resp2.Err != nil {
+	if ch2, err := ss.Channel().GetChannelUnread(c2.Id, uid); err != nil {
-		t.Fatal(resp2.Err)
+		t.Fatal(err)
 	} else {
-		ch2 := resp2.Data.(*model.ChannelUnread)
 		if c2.Id != ch2.ChannelId {
 			t.Fatal("wrong channel id")
 		}

store/storetest/mocks/ChannelStore.go

@@ -348,19 +348,28 @@ func (_m *ChannelStore) GetChannelMembersTimezones(channelId string) store.Store
 }
 
 // GetChannelUnread provides a mock function with given fields: channelId, userId
-func (_m *ChannelStore) GetChannelUnread(channelId string, userId string) store.StoreChannel {
+func (_m *ChannelStore) GetChannelUnread(channelId string, userId string) (*model.ChannelUnread, *model.AppError) {
 	ret := _m.Called(channelId, userId)
 
-	var r0 store.StoreChannel
+	var r0 *model.ChannelUnread
-	if rf, ok := ret.Get(0).(func(string, string) store.StoreChannel); ok {
+	if rf, ok := ret.Get(0).(func(string, string) *model.ChannelUnread); ok {
 		r0 = rf(channelId, userId)
 	} else {
 		if ret.Get(0) != nil {
-			r0 = ret.Get(0).(store.StoreChannel)
+			r0 = ret.Get(0).(*model.ChannelUnread)
 		}
 	}
 
-	return r0
+	var r1 *model.AppError
+	if rf, ok := ret.Get(1).(func(string, string) *model.AppError); ok {
+		r1 = rf(channelId, userId)
+	} else {
+		if ret.Get(1) != nil {
+			r1 = ret.Get(1).(*model.AppError)
+		}
+	}
+
+	return r0, r1
 }
 
 // GetChannels provides a mock function with given fields: teamId, userId, includeDeleted