Merge pull request #9227 from RocketChat/fix-update-last-message

Fix: updating last message on message edit or delete

packages/rocketchat-lib/server/functions/deleteMessage.js

@@ -29,6 +29,12 @@ RocketChat.deleteMessage = function(message, user) {
 		});
 	}
 
+	// update last message
+	if (RocketChat.settings.get('Store_Last_Message')) {
+		const lastMessage = RocketChat.models.Messages.getLastMessageSentWithNoTypeByRoomId(message.rid);
+		RocketChat.models.Rooms.setLastMessageById(message.rid, lastMessage);
+	}
+
 	if (showDeletedStatus) {
 		RocketChat.models.Messages.setAsDeletedByIdAndUser(message._id, user);
 	} else {

packages/rocketchat-lib/server/lib/notifyUsersOnMessage.js

@@ -9,7 +9,11 @@ RocketChat.callbacks.add('afterSaveMessage', function(message, room) {
 		RocketChat.models.Rooms.incMsgCountById(message.rid, 1);
 		return message;
 	} else if (message.editedAt) {
-		// skips this callback if the message was edited
+
+		// only updates last message if it was edited (skip rest of callback)
+		if (RocketChat.settings.get('Store_Last_Message') && (!room.lastMessage || room.lastMessage._id === message._id)) {
+			RocketChat.models.Rooms.setLastMessageById(message.rid, message);
+		}
 		return message;
 	}
 

packages/rocketchat-lib/server/models/Messages.js

@@ -279,11 +279,26 @@ RocketChat.models.Messages = new class extends RocketChat.models._Base {
 	}
 
 	findOneBySlackTs(slackTs) {
-		const query =	{slackTs};
+		const query = {slackTs};
 
 		return this.findOne(query);
 	}
 
+	getLastMessageSentWithNoTypeByRoomId(rid) {
+		const query = {
+			rid,
+			t: { $exists: false }
+		};
+
+		const options = {
+			sort: {
+				ts: -1
+			}
+		};
+
+		return this.findOne(query, options);
+	}
+
 	cloneAndSaveAsHistoryById(_id) {
 		const me = RocketChat.models.Users.findOneById(Meteor.userId());
 		const record = this.findOneById(_id);

packages/rocketchat-lib/server/models/Rooms.js

@@ -556,6 +556,18 @@ class ModelRooms extends RocketChat.models._Base {
 		return this.update(query, update);
 	}
 
+	setLastMessageById(_id, lastMessage) {
+		const query = {_id};
+
+		const update = {
+			$set: {
+				lastMessage
+			}
+		};
+
+		return this.update(query, update);
+	}
+
 	replaceUsername(previousUsername, username) {
 		const query = {usernames: previousUsername};