refactor max channels per team enforcement (#7690)

app/channel.go

@@ -142,7 +142,7 @@ func (a *App) CreateChannelWithUser(channel *model.Channel, userId string) (*mod
 }
 
 func (a *App) CreateChannel(channel *model.Channel, addMember bool) (*model.Channel, *model.AppError) {
-	if result := <-a.Srv.Store.Channel().Save(channel); result.Err != nil {
+	if result := <-a.Srv.Store.Channel().Save(channel, *a.Config().TeamSettings.MaxChannelsPerTeam); result.Err != nil {
 		return nil, result.Err
 	} else {
 		sc := result.Data.(*model.Channel)
@@ -282,7 +282,7 @@ func (a *App) createGroupChannel(userIds []string, creatorId string) (*model.Cha
 		Type:        model.CHANNEL_GROUP,
 	}
 
-	if result := <-a.Srv.Store.Channel().Save(group); result.Err != nil {
+	if result := <-a.Srv.Store.Channel().Save(group, *a.Config().TeamSettings.MaxChannelsPerTeam); result.Err != nil {
 		if result.Err.Id == store.CHANNEL_EXISTS_ERROR {
 			return result.Data.(*model.Channel), result.Err
 		} else {

app/import.go

@@ -1476,7 +1476,7 @@ func (a *App) OldImportUser(team *model.Team, user *model.User) *model.User {
 }
 
 func (a *App) OldImportChannel(channel *model.Channel) *model.Channel {
-	if result := <-a.Srv.Store.Channel().Save(channel); result.Err != nil {
+	if result := <-a.Srv.Store.Channel().Save(channel, *a.Config().TeamSettings.MaxChannelsPerTeam); result.Err != nil {
 		return nil
 	} else {
 		sc := result.Data.(*model.Channel)