src/telegram: Add TelegramBot#uploadStickerFile

Notes:

    * Closes PR #430

References:

    * FR: https://github.com/yagop/node-telegram-bot-api/issues/407
    * PR: https://github.com/yagop/node-telegram-bot-api/pull/430
    * PR-by: @CapacitorSet

CHANGELOG.md

@@ -7,7 +7,9 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 Added:
 
-1. (#429) Add *TelegramBot#getStickerSet* (by @CapacitorSet, @LibertyLocked)
+1. Add methods:
+  * (#429) Add *TelegramBot#getStickerSet* (by @CapacitorSet, @LibertyLocked)
+  * (#430) Add *TelegramBot#uploadStickerFile* (by @CapacitorSet)
 
 
 * * *

doc/api.md

@@ -76,6 +76,7 @@ TelegramBot
         * [.answerShippingQuery(shippingQueryId, ok, [options])](#TelegramBot+answerShippingQuery) ⇒ <code>Promise</code>
         * [.answerPreCheckoutQuery(preCheckoutQueryId, ok, [options])](#TelegramBot+answerPreCheckoutQuery) ⇒ <code>Promise</code>
         * [.getStickerSet(name, [options])](#TelegramBot+getStickerSet) ⇒ <code>Promise</code>
+        * [.uploadStickerFile(userId, pngSticker, [options])](#TelegramBot+uploadStickerFile) ⇒ <code>Promise</code>
     * _static_
         * [.Promise](#TelegramBot.Promise)
 
@@ -991,6 +992,21 @@ Use this method to get a sticker set. On success, a [StickerSet](https://core.te
 | name | <code>String</code> | Name of the sticker set |
 | [options] | <code>Object</code> | Additional Telegram query options |
 
+<a name="TelegramBot+uploadStickerFile"></a>
+
+### telegramBot.uploadStickerFile(userId, pngSticker, [options]) ⇒ <code>Promise</code>
+Use this method to upload a .png file with a sticker for later use in *createNewStickerSet* and *addStickerToSet* methods (can be used multiple
+times). Returns the uploaded [File](https://core.telegram.org/bots/api#file) on success.
+
+**Kind**: instance method of <code>[TelegramBot](#TelegramBot)</code>  
+**See**: https://core.telegram.org/bots/api#uploadstickerfile  
+
+| Param | Type | Description |
+| --- | --- | --- |
+| userId | <code>Number</code> | User identifier of sticker file owner |
+| pngSticker | <code>String</code> &#124; <code>stream.Stream</code> &#124; <code>Buffer</code> | A file path or a Stream. Can also be a `file_id` previously uploaded. **Png** image with the  sticker, must be up to 512 kilobytes in size, dimensions must not exceed 512px, and either width or height must be exactly 512px. |
+| [options] | <code>Object</code> | Additional Telegram query options |
+
 <a name="TelegramBot.Promise"></a>
 
 ### TelegramBot.Promise

src/telegram.js

@@ -1512,6 +1512,32 @@ class TelegramBot extends EventEmitter {
     form.name = name;
     return this._request('getStickerSet', { form });
   }
+
+  /**
+   * Use this method to upload a .png file with a sticker for later use in *createNewStickerSet* and *addStickerToSet* methods (can be used multiple
+   * times). Returns the uploaded [File](https://core.telegram.org/bots/api#file) on success.
+   *
+   * @param  {Number} userId User identifier of sticker file owner
+   * @param  {String|stream.Stream|Buffer} pngSticker A file path or a Stream. Can also be a `file_id` previously uploaded. **Png** image with the
+   *  sticker, must be up to 512 kilobytes in size, dimensions must not exceed 512px, and either width or height must be exactly 512px.
+   * @param  {Object} [options] Additional Telegram query options
+   * @return {Promise}
+   * @see https://core.telegram.org/bots/api#uploadstickerfile
+   */
+  uploadStickerFile(userId, pngSticker, options = {}) {
+    const opts = {
+      qs: options,
+    };
+    opts.qs.user_id = userId;
+    try {
+      const sendData = this._formatSendData('png_sticker', pngSticker);
+      opts.formData = sendData[0];
+      opts.qs.png_sticker = sendData[1];
+    } catch (ex) {
+      return Promise.reject(ex);
+    }
+    return this._request('uploadStickerFile', opts);
+  }
 }
 
 module.exports = TelegramBot;

test/telegram.js

@@ -1371,4 +1371,18 @@ describe('TelegramBot', function telegramSuite() {
       });
     });
   });
+
+  describe('#uploadStickerFile', function sendPhotoSuite() {
+    before(function before() {
+      utils.handleRatelimit(bot, 'uploadStickerFile', this);
+    });
+    it('should upload a sticker from file', function test() {
+      const sticker = `${__dirname}/data/sticker.png`;
+      return bot.uploadStickerFile(USERID, sticker).then(resp => {
+        assert.ok(is.object(resp));
+        assert.ok(is.string(resp.file_id));
+      });
+    });
+    // Other tests (eg. Buffer, URL) are skipped, because they rely on the same features as sendPhoto.
+  });
 }); // End Telegram