Revert/Fix PLT-2805 (#3873)

api/channel.go

@@ -354,7 +354,7 @@ func PostUpdateChannelHeaderMessage(c *Context, channelId string, oldChannelHead
 			Type:      model.POST_HEADER_CHANGE,
 			UserId:    c.Session.UserId,
 		}
-		if _, err := CreatePost(c.TeamId, post, false); err != nil {
+		if _, err := CreatePost(c, post, false); err != nil {
 			l4g.Error(utils.T("api.channel.post_update_channel_header_message_and_forget.join_leave.error"), err)
 		}
 	}
@@ -546,7 +546,7 @@ func PostUserAddRemoveMessage(c *Context, channelId string, message, postType st
 		Type:      postType,
 		UserId:    c.Session.UserId,
 	}
-	if _, err := CreatePost(c.TeamId, post, false); err != nil {
+	if _, err := CreatePost(c, post, false); err != nil {
 		l4g.Error(utils.T("api.channel.post_user_add_remove_message_and_forget.error"), err)
 	}
 }
@@ -618,7 +618,16 @@ func JoinDefaultChannels(teamId string, user *model.User, channelRole string) *m
 			Type:      model.POST_JOIN_LEAVE,
 			UserId:    user.Id,
 		}
-		if _, err := CreatePost(teamId, post, false); err != nil {
+
+		fakeContext := &Context{
+			Session: model.Session{
+				UserId: user.Id,
+			},
+			TeamId: teamId,
+			T:      utils.TfuncWithFallback(user.Locale),
+		}
+
+		if _, err := CreatePost(fakeContext, post, false); err != nil {
 			l4g.Error(utils.T("api.channel.post_user_add_remove_message_and_forget.error"), err)
 		}
 	}
@@ -794,7 +803,7 @@ func deleteChannel(c *Context, w http.ResponseWriter, r *http.Request) {
 				Type:      model.POST_CHANNEL_DELETED,
 				UserId:    c.Session.UserId,
 			}
-			if _, err := CreatePost(c.TeamId, post, false); err != nil {
+			if _, err := CreatePost(c, post, false); err != nil {
 				l4g.Error(utils.T("api.channel.delete_channel.failed_post.error"), err)
 			}
 		}()