src/telegram: Support 'deleteMessage' API method

src/telegram.js

@@ -1167,6 +1167,21 @@ class TelegramBot extends EventEmitter {
     form.user_id = userId;
     return this._request('getGameHighScores', { form });
   }
+  
+    
+  /**
+   * Use this method to delete a message.
+   * @param  {String} chatId  Unique identifier of the target chat
+   * @param  {String} messageId  Unique identifier of the target message
+   * @param  {Object} [options] Additional Telegram query options
+   * @return {Promise}
+   * @see https://core.telegram.org/bots/api#deletemessage
+   */
+  deleteMessage(chatId, messageId, form = {}) {
+    form.chat_id = chatId;
+    form.message_id = messageId;
+    return this._request('deleteMessage', { form });
+  }
 }
 
 module.exports = TelegramBot;

test/telegram.js

@@ -837,6 +837,21 @@ describe('TelegramBot', function telegramSuite() {
     });
   });
 
+  describe('#deleteMessage', function deleteMessageSuite() {
+    let messageId;
+    before(function before() {
+      utils.handleRatelimit(bot, 'deleteMessage', this);
+      return bot.sendMessage(USERID, 'To be deleted').then(resp => {
+        messageId = resp.message_id;
+      });
+    });
+    it('should delete message', function test() {
+      return bot.deleteMessage(USERID, messageId).then(resp => {
+        assert.equal(resp, true);
+      });
+    });
+  });
+
   describe('#getUserProfilePhotos', function getUserProfilePhotosSuite() {
     const opts = {
       offset: 0,