[NEW] Apps: Add handlers for message updates (#11993)

* Add IPreMessageUpdatedPrevent, Extend & Modify

* Add IPostMessageUpdated

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

@@ -118,7 +118,7 @@ RocketChat.sendMessage = function(user, message, room, upsert = false) {
 	if (message && Apps && Apps.isLoaded()) {
 		const prevent = Promise.await(Apps.getBridges().getListenerBridge().messageEvent('IPreMessageSentPrevent', message));
 		if (prevent) {
-			throw new Meteor.Error('error-app-prevented-sending', 'A Rocket.Chat App prevented the messaging sending.');
+			throw new Meteor.Error('error-app-prevented-sending', 'A Rocket.Chat App prevented the message sending.');
 		}
 
 		let result;

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

@@ -1,4 +1,20 @@
 RocketChat.updateMessage = function(message, user) {
+	// For the Rocket.Chat Apps :)
+	if (message && Apps && Apps.isLoaded()) {
+		const prevent = Promise.await(Apps.getBridges().getListenerBridge().messageEvent('IPreMessageUpdatedPrevent', message));
+		if (prevent) {
+			throw new Meteor.Error('error-app-prevented-updating', 'A Rocket.Chat App prevented the message updating.');
+		}
+
+		let result;
+		result = Promise.await(Apps.getBridges().getListenerBridge().messageEvent('IPreMessageUpdatedExtend', message));
+		result = Promise.await(Apps.getBridges().getListenerBridge().messageEvent('IPreMessageUpdatedModify', result));
+
+		if (typeof result === 'object') {
+			message = Object.assign(message, result);
+		}
+	}
+
 	// If we keep history of edits, insert a new message to store history information
 	if (RocketChat.settings.get('Message_KeepHistory')) {
 		RocketChat.models.Messages.cloneAndSaveAsHistoryById(message._id);
@@ -22,6 +38,12 @@ RocketChat.updateMessage = function(message, user) {
 
 	const room = RocketChat.models.Rooms.findOneById(message.rid);
 
+	if (Apps && Apps.isLoaded()) {
+		// This returns a promise, but it won't mutate anything about the message
+		// so, we don't really care if it is successful or fails
+		Apps.getBridges().getListenerBridge().messageEvent('IPostMessageUpdated', message);
+	}
+
 	Meteor.defer(function() {
 		RocketChat.callbacks.run('afterSaveMessage', RocketChat.models.Messages.findOneById(tempid), room, user._id);
 	});