feat: Send buttons and Lists (#756)

src/structures/Buttons.js

@@ -0,0 +1,68 @@
+'use strict';
+
+const MessageMedia = require('./MessageMedia');
+const Util = require('../util/Util');
+
+/**
+ * Message type buttons
+ */
+class Buttons {
+    /**
+     * @param {string|MessageMedia} body
+     * @param {Array<Array<string>>} buttons
+     * @param {string?} title
+     * @param {string?} footer
+     */
+    constructor(body, buttons, title, footer) {
+        /**
+         * Message body
+         * @type {string|MessageMedia}
+         */
+        this.body = body;
+
+        /**
+         * title of message
+         * @type {string}
+         */
+        this.title = title;
+        
+        /**
+         * footer of message
+         * @type {string}
+         */
+        this.footer = footer;
+
+        if (body instanceof MessageMedia) {
+            this.type = 'media';
+            this.title = '';
+        }else{
+            this.type = 'chat';
+        }
+
+        /**
+         * buttons of message
+         * @type {Array<Array<string>>}
+         */
+        this.buttons = this._format(buttons);
+        if(!this.buttons.length){ throw '[BT01] No buttons';}
+                
+    }
+
+    /**
+     * Creates button array from simple array
+     * @param {Array<Array<string>>} buttons
+     * @returns {Array<Array<string>>}
+     * @example 
+     * Input: [{id:'customId',body:'button1'},{body:'button2'},{body:'button3'},{body:'button4'}]
+     * Returns: [{ buttonId:'customId',buttonText:{'displayText':'button1'},type: 1 },{buttonId:'n3XKsL',buttonText:{'displayText':'button2'},type:1},{buttonId:'NDJk0a',buttonText:{'displayText':'button3'},type:1}]
+     */
+    _format(buttons){
+        buttons = buttons.slice(0,3); // phone users can only see 3 buttons, so lets limit this
+        return buttons.map((btn) => {
+            return {'buttonId':btn.id ? btn.id : Util.generateHash(6),'buttonText':{'displayText':btn.body},'type':1};
+        });
+    }
+    
+}
+
+module.exports = Buttons;