src/polling: Add constructor option 'options.polling.params'

Feature:

  Please see the updated API reference for more information on this
  new option.

Side-effects:

  * `options.timeout` is deprecated!

References:

  * "Feature request": yagop/node-telegram-bot-api#243

CHANGELOG.md

@@ -7,6 +7,8 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 Added:
 
+1. Add constructor options:
+  * `options.polling.params` (by @GochoMugo)
 1. Add methods:
   * *TelegramBot#removeReplyListener()* (by @githugger)
 1. Add proper error handling (by @GochoMugo)

doc/api.md

@@ -71,9 +71,10 @@ Emits `message` when a message arrives.
 | token | <code>String</code> |  | Bot Token |
 | [options] | <code>Object</code> |  |  |
 | [options.polling] | <code>Boolean</code> &#124; <code>Object</code> | <code>false</code> | Set true to enable polling or set options.  If a WebHook has been set, it will be deleted automatically. |
-| [options.polling.timeout] | <code>String</code> &#124; <code>Number</code> | <code>10</code> | Timeout in seconds for long polling |
+| [options.polling.timeout] | <code>String</code> &#124; <code>Number</code> | <code>10</code> | *Deprecated. Use `options.polling.params` instead*.  Timeout in seconds for long polling. |
 | [options.polling.interval] | <code>String</code> &#124; <code>Number</code> | <code>300</code> | Interval between requests in miliseconds |
 | [options.polling.autoStart] | <code>Boolean</code> | <code>true</code> | Start polling immediately |
+| [options.polling.params] | <code>Object</code> |  | Parameters to be used in polling API requests.  See https://core.telegram.org/bots/api#getupdates for more information. |
 | [options.webHook] | <code>Boolean</code> &#124; <code>Object</code> | <code>false</code> | Set true to enable WebHook or set options |
 | [options.webHook.host] | <code>String</code> | <code>0.0.0.0</code> | Host to bind to |
 | [options.webHook.port] | <code>Number</code> | <code>8443</code> | Port to bind to |

src/telegram.js

@@ -51,9 +51,12 @@ class TelegramBot extends EventEmitter {
    * @param {Object} [options]
    * @param {Boolean|Object} [options.polling=false] Set true to enable polling or set options.
    *  If a WebHook has been set, it will be deleted automatically.
-   * @param {String|Number} [options.polling.timeout=10] Timeout in seconds for long polling
+   * @param {String|Number} [options.polling.timeout=10] *Deprecated. Use `options.polling.params` instead*.
+   *  Timeout in seconds for long polling.
    * @param {String|Number} [options.polling.interval=300] Interval between requests in miliseconds
    * @param {Boolean} [options.polling.autoStart=true] Start polling immediately
+   * @param {Object} [options.polling.params] Parameters to be used in polling API requests.
+   *  See https://core.telegram.org/bots/api#getupdates for more information.
    * @param {Boolean|Object} [options.webHook=false] Set true to enable WebHook or set options
    * @param {String} [options.webHook.host=0.0.0.0] Host to bind to
    * @param {Number} [options.webHook.port=8443] Port to bind to

src/telegramPolling.js

@@ -1,4 +1,5 @@
 const debug = require('debug')('node-telegram-bot-api');
+const deprecate = require('depd')('node-telegram-bot-api');
 const ANOTHER_WEB_HOOK_USED = 409;
 
 
@@ -11,9 +12,15 @@ class TelegramBotPolling {
   constructor(bot) {
     this.bot = bot;
     this.options = (typeof bot.options.polling === 'boolean') ? {} : bot.options.polling;
-    this.options.timeout = (typeof this.options.timeout === 'number') ? this.options.timeout : 10;
     this.options.interval = (typeof this.options.interval === 'number') ? this.options.interval : 300;
-    this._offset = 0;
+    this.options.params = (typeof this.options.params === 'object') ? this.options.params : {};
+    this.options.params.offset = (typeof this.options.params.offset === 'number') ? this.options.params.offset : 0;
+    if (typeof this.options.timeout === 'number') {
+      deprecate('`options.polling.timeout` is deprecated. Use `options.polling.params` instead.');
+      this.options.params.timeout = this.options.timeout;
+    } else {
+      this.options.params.timeout = 10;
+    }
     this._lastUpdate = 0;
     this._lastRequest = null;
     this._abort = false;
@@ -85,8 +92,8 @@ class TelegramBotPolling {
         this._lastUpdate = Date.now();
         debug('polling data %j', updates);
         updates.forEach(update => {
-          this._offset = update.update_id;
-          debug('updated offset: %s', this._offset);
+          this.options.params.offset = update.update_id + 1;
+          debug('updated offset: %s', this.options.params.offset);
           this.bot.processUpdate(update);
         });
         return null;
@@ -125,16 +132,8 @@ class TelegramBotPolling {
    * Retrieve updates
    */
   _getUpdates() {
-    const opts = {
-      qs: {
-        offset: this._offset + 1,
-        limit: this.options.limit,
-        timeout: this.options.timeout
-      },
-    };
-    debug('polling with options: %j', opts);
-
-    return this.bot._request('getUpdates', opts)
+    debug('polling with options: %j', this.options.params);
+    return this.bot._request('getUpdates', this.options.params)
       .catch(err => {
         if (err.response && err.response.statusCode === ANOTHER_WEB_HOOK_USED) {
           return this._unsetWebHook();