adding chat.react API EndPoint

packages/rocketchat-api/server/v1/chat.js

@@ -255,3 +255,23 @@ RocketChat.API.v1.addRoute('chat.update', { authRequired: true }, {
 		});
 	}
 });
+
+RocketChat.API.v1.addRoute('chat.react', { authRequired: true }, {
+	post() {
+		if (!this.bodyParams.messageId || !this.bodyParams.messageId.trim()) {
+			throw new Meteor.Error('error-messageid-param-not-provided', 'The required "messageId" param is missing.');
+		}
+
+		const msg = RocketChat.models.Messages.findOneById(this.bodyParams.messageId);
+
+		if (!msg) {
+			throw new Meteor.Error('error-message-not-found', 'The provided "messageId" does not match any existing message.');
+		}
+
+		const emoji = this.bodyParams.emoji;
+
+		Meteor.runAsUser(this.userId, () => Meteor.call('setReaction', emoji, msg._id, this.userId));
+
+		return RocketChat.API.v1.success();
+	}
+});

packages/rocketchat-reactions/client/methods/setReaction.js

@@ -1,12 +1,12 @@
 import _ from 'underscore';
 
 Meteor.methods({
-	setReaction(reaction, messageId) {
+	setReaction(reaction, messageId, usr) {
 		if (!Meteor.userId()) {
 			throw new Meteor.Error(203, 'User_logged_out');
 		}
 
-		const user = Meteor.user();
+		const user = usr ? usr : Meteor.user();
 
 		const message = RocketChat.models.Messages.findOne({ _id: messageId });
 		const room = RocketChat.models.Rooms.findOne({ _id: message.rid });