src/telegram: Add TelegramBot#removeReplyListener()

Feature:

  Please see the updated API Reference.

References:

  * Author: @githugger (Frederic Schneider <fschneider1992@gmail.com>)
  * Original PR: https://github.com/yagop/node-telegram-bot-api/pull/74

CHANGELOG.md

@@ -7,6 +7,8 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 Added:
 
+1. Add methods:
+  * *TelegramBot#removeReplyListener()* (by @githugger)
 1. Add health-check endpoint (by @mironov)
   * `options.webHook.healthEndpoint`
 1. Use *String#indexOf()*, instead of *RegExp#test()*, to

doc/api.md

@@ -47,7 +47,8 @@ TelegramBot
     * [.getFileLink(fileId)](#TelegramBot+getFileLink) ⇒ <code>Promise</code>
     * [.downloadFile(fileId, downloadDir)](#TelegramBot+downloadFile) ⇒ <code>Promise</code>
     * [.onText(regexp, callback)](#TelegramBot+onText)
-    * [.onReplyToMessage(chatId, messageId, callback)](#TelegramBot+onReplyToMessage)
+    * [.onReplyToMessage(chatId, messageId, callback)](#TelegramBot+onReplyToMessage) ⇒ <code>Number</code>
+    * [.removeReplyListener(replyListenerId)](#TelegramBot+removeReplyListener) ⇒ <code>Object</code>
     * [.getChat(chatId)](#TelegramBot+getChat) ⇒ <code>Promise</code>
     * [.getChatAdministrators(chatId)](#TelegramBot+getChatAdministrators) ⇒ <code>Promise</code>
     * [.getChatMembersCount(chatId)](#TelegramBot+getChatMembersCount) ⇒ <code>Promise</code>
@@ -594,10 +595,11 @@ Register a RegExp to test against an incomming text message.
 
 <a name="TelegramBot+onReplyToMessage"></a>
 
-### telegramBot.onReplyToMessage(chatId, messageId, callback)
+### telegramBot.onReplyToMessage(chatId, messageId, callback) ⇒ <code>Number</code>
 Register a reply to wait for a message response.
 
 **Kind**: instance method of <code>[TelegramBot](#TelegramBot)</code>  
+**Returns**: <code>Number</code> - id                    The ID of the inserted reply listener.  
 
 | Param | Type | Description |
 | --- | --- | --- |
@@ -605,6 +607,20 @@ Register a reply to wait for a message response.
 | messageId | <code>Number</code> &#124; <code>String</code> | The message id to be replied. |
 | callback | <code>function</code> | Callback will be called with the reply  message. |
 
+<a name="TelegramBot+removeReplyListener"></a>
+
+### telegramBot.removeReplyListener(replyListenerId) ⇒ <code>Object</code>
+Removes a reply that has been prev. registered for a message response.
+
+**Kind**: instance method of <code>[TelegramBot](#TelegramBot)</code>  
+**Returns**: <code>Object</code> - deletedListener      The removed reply listener if
+  found. This object has `id`, `chatId`, `messageId` and `callback`
+  properties. If not found, returns `null`.  
+
+| Param | Type | Description |
+| --- | --- | --- |
+| replyListenerId | <code>Number</code> | The ID of the reply listener. |
+
 <a name="TelegramBot+getChat"></a>
 
 ### telegramBot.getChat(chatId) ⇒ <code>Promise</code>

src/telegram.js

@@ -79,7 +79,8 @@ class TelegramBot extends EventEmitter {
     this.options.baseApiUrl = options.baseApiUrl || 'https://api.telegram.org';
     this.options.filepath = (typeof options.filepath === 'undefined') ? true : options.filepath;
     this._textRegexpCallbacks = [];
-    this._onReplyToMessages = [];
+    this._replyListenerId = 0;
+    this._replyListeners = [];
     this._polling = null;
     this._webHook = null;
 
@@ -483,7 +484,7 @@ class TelegramBot extends EventEmitter {
       }
       if (message.reply_to_message) {
         // Only callbacks waiting for this message
-        this._onReplyToMessages.forEach(reply => {
+        this._replyListeners.forEach(reply => {
           // Message from the same chat
           if (reply.chatId === message.chat.id) {
             // Responding to that message
@@ -1012,13 +1013,34 @@ class TelegramBot extends EventEmitter {
    * @param  {Number|String}   messageId    The message id to be replied.
    * @param  {Function} callback     Callback will be called with the reply
    *  message.
+   * @return {Number} id                    The ID of the inserted reply listener.
    */
   onReplyToMessage(chatId, messageId, callback) {
-    this._onReplyToMessages.push({
+    const id = ++this._replyListenerId;
+    this._replyListeners.push({
+      id,
       chatId,
       messageId,
       callback
     });
+    return id;
+  }
+
+  /**
+   * Removes a reply that has been prev. registered for a message response.
+   * @param   {Number} replyListenerId      The ID of the reply listener.
+   * @return  {Object} deletedListener      The removed reply listener if
+   *   found. This object has `id`, `chatId`, `messageId` and `callback`
+   *   properties. If not found, returns `null`.
+   */
+  removeReplyListener(replyListenerId) {
+    const index = this._replyListeners.findIndex((replyListener) => {
+      return replyListener.id === replyListenerId;
+    });
+    if (index === -1) {
+      return null;
+    }
+    return this._replyListeners.splice(index, 1)[0];
   }
 
   /**

test/telegram.js

@@ -890,6 +890,24 @@ describe('TelegramBot', function telegramSuite() {
 
   describe.skip('#onReplyToMessage', function onReplyToMessageSuite() {});
 
+  describe('#removeReplyListener', function removeReplyListenerSuite() {
+    const chatId = -1234;
+    const messageId = 1;
+    const callback = function noop() {};
+    it('returns the right reply-listener', function test() {
+      const id = bot.onReplyToMessage(chatId, messageId, callback);
+      const replyListener = bot.removeReplyListener(id);
+      assert.equal(id, replyListener.id);
+      assert.equal(chatId, replyListener.chatId);
+      assert.equal(messageId, replyListener.messageId);
+      assert.equal(callback, replyListener.callback);
+    });
+    it('returns `null` if missing', function test() {
+      // NOTE: '0' is never a valid reply listener ID :)
+      assert.equal(null, bot.removeReplyListener(0));
+    });
+  });
+
   describe('#getChat', function getChatSuite() {
     before(function before() {
       utils.handleRatelimit(bot, 'getChat', this);