MM-11725: Add specific autocomplete endpoint for search autocomplete (#9337)

app/channel.go

@@ -1507,6 +1507,16 @@ func (a *App) AutocompleteChannels(teamId string, term string) (*model.ChannelLi
 	}
 }
 
+func (a *App) AutocompleteChannelsForSearch(teamId string, userId string, term string) (*model.ChannelList, *model.AppError) {
+	includeDeleted := *a.Config().TeamSettings.ExperimentalViewArchivedChannels
+
+	if result := <-a.Srv.Store.Channel().AutocompleteInTeamForSearch(teamId, userId, term, includeDeleted); result.Err != nil {
+		return nil, result.Err
+	} else {
+		return result.Data.(*model.ChannelList), nil
+	}
+}
+
 func (a *App) SearchChannels(teamId string, term string) (*model.ChannelList, *model.AppError) {
 	includeDeleted := *a.Config().TeamSettings.ExperimentalViewArchivedChannels