Merge branch 'release/v2.5.0'

Author: ivanmarban

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+## [v2.5.0] - 2021-11-9
+### Added
+- [#29](https://github.com/ivanmarban/winston-telegram/issues/29) Split long messages.
+
 ## [v2.4.1] - 2021-09-26
 ### Changed
 - Revert back sf dependency to latest version.
@@ -140,7 +144,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ## [v0.1.0] - 2015-11-12
 - First version.
 
-[unreleased]: https://github.com/ivanmarban/winston-telegram/compare/v2.4.1...develop
+[unreleased]: https://github.com/ivanmarban/winston-telegram/compare/v2.5.0...develop
+[v2.5.0]: https://github.com/ivanmarban/winston-telegram/compare/v2.4.1...v2.5.0
 [v2.4.1]: https://github.com/ivanmarban/winston-telegram/compare/v2.4.0...v2.4.1
 [v2.4.0]: https://github.com/ivanmarban/winston-telegram/compare/v2.3.5...v2.4.0
 [v2.3.5]: https://github.com/ivanmarban/winston-telegram/compare/v2.3.4...v2.3.5

lib/winston-telegram.js

@@ -8,6 +8,7 @@
 const https = require('https')
 const format = require('sf')
 const Transport = require('winston-transport')
+const MAX_MESSAGE_LENGTH = 4096
 
 /**
  * @constructs
@@ -99,7 +100,7 @@ module.exports = class Telegram extends Transport {
   }
 
   /**
-   * Actual method that sends the given message to Telegram.
+   * Sends the given message to Telegram splitted as needed.
    *
    * @function send
    * @param {string} messageText - Formatted text to log.
@@ -108,6 +109,31 @@ module.exports = class Telegram extends Transport {
   send (messageText) {
     const self = this
 
+    if (messageText.length < MAX_MESSAGE_LENGTH) {
+      self.sendMessage(messageText)
+    } else {
+      const size = Math.ceil(messageText.length / MAX_MESSAGE_LENGTH)
+      const arr = Array(size)
+      let offset = 0
+
+      for (let i = 0; i < size; i++) {
+        arr[i] = messageText.substr(offset, MAX_MESSAGE_LENGTH)
+        offset += MAX_MESSAGE_LENGTH
+      }
+      arr.forEach(message => self.sendMessage(message))
+    }
+  }
+
+  /**
+   * Actual method that sends the given message to Telegram.
+   *
+   * @function sendMessage
+   * @param {string} messageText - Formatted text to log.
+   * @private
+   */
+  sendMessage (messageText) {
+    const self = this
+
     const requestData = JSON.stringify({
       chat_id: this.chatId,
       text: messageText,

package-lock.json

@@ -1,7 +1,7 @@
 {
   "name": "winston-telegram",
   "description": "A Telegram transport for winston",
-  "version": "2.4.1",
+  "version": "2.5.0",
   "author": "Ivan Marban",
   "repository": {
     "type": "git",

package.json

@@ -269,6 +269,25 @@ describe('winston-telegram', function () {
       assert.ok(spy.callCount === 2)
       done()
     })
+
+    it('Should send splited message', function (done) {
+      nock('https://api.telegram.org')
+        .post('/botfoo/sendMessage')
+        .times(2)
+        .reply(200, { ok: true, result: {} })
+      winston.add(
+        new Transport({
+          token: 'foo',
+          chatId: 'bar',
+          level: 'error'
+        })
+      )
+      winston.error('a'.repeat(5000))
+      assert.strictEqual(JSON.parse(spy.getCalls()[0].args[1]).text.length, 4096)
+      assert.strictEqual(JSON.parse(spy.getCalls()[1].args[1]).text.length, 912)
+      assert.ok(spy.callCount === 2)
+      done()
+    })
   })
 
   describe('Emitting errors', function () {