Feat: add message_reaction event (#1619)

* Add 'message_reaction' event

src/structures/Reaction.js

@@ -0,0 +1,69 @@
+'use strict';
+
+const Base = require('./Base');
+
+/**
+ * Represents a Reaction on WhatsApp
+ * @extends {Base}
+ */
+class Reaction extends Base {
+    constructor(client, data) {
+        super(client);
+
+        if (data) this._patch(data);
+    }
+
+    _patch(data) {
+        /**
+         * Reaction ID
+         * @type {object}
+         */
+        this.id = data.msgKey;
+        /**
+         * Orphan
+         * @type {number}
+         */
+        this.orphan = data.orphan;
+        /**
+         * Orphan reason
+         * @type {?string}
+         */
+        this.orphanReason = data.orphanReason;
+        /**
+         * Unix timestamp for when the reaction was created
+         * @type {number}
+         */
+        this.timestamp = data.timestamp;
+        /**
+         * Reaction
+         * @type {string}
+         */
+        this.reaction = data.reactionText;
+        /**
+         * Read
+         * @type {boolean}
+         */
+        this.read = data.read;
+        /**
+         * Message ID
+         * @type {object}
+         */
+        this.msgId = data.parentMsgKey;
+        /**
+         * Sender ID
+         * @type {string}
+         */
+        this.senderId = data.senderUserJid;
+        /**
+         * ACK
+         * @type {?number}
+         */
+        this.ack = data.ack;
+        
+        
+        return super._patch(data);
+    }
+    
+}
+
+module.exports = Reaction;

src/structures/index.js

@@ -18,4 +18,5 @@ module.exports = {
     Buttons: require('./Buttons'),
     List: require('./List'),
     Payment: require('./Payment'),
+    Reaction: require('./Reaction'),
 };