Add caching for file infos (#5330)

app/notification.go

@@ -26,7 +26,7 @@ import (
 
 func SendNotifications(post *model.Post, team *model.Team, channel *model.Channel, sender *model.User) ([]string, *model.AppError) {
 	pchan := Srv.Store.User().GetAllProfilesInChannel(channel.Id, true)
-	fchan := Srv.Store.FileInfo().GetForPost(post.Id)
+	fchan := Srv.Store.FileInfo().GetForPost(post.Id, true)
 
 	var profileMap map[string]*model.User
 	if result := <-pchan; result.Err != nil {
@@ -414,7 +414,7 @@ func GetMessageForNotification(post *model.Post, translateFunc i18n.TranslateFun
 
 	// extract the filenames from their paths and determine what type of files are attached
 	var infos []*model.FileInfo
-	if result := <-Srv.Store.FileInfo().GetForPost(post.Id); result.Err != nil {
+	if result := <-Srv.Store.FileInfo().GetForPost(post.Id, true); result.Err != nil {
 		l4g.Warn(utils.T("api.post.get_message_for_notification.get_files.error"), post.Id, result.Err)
 	} else {
 		infos = result.Data.([]*model.FileInfo)