javascript - Trying to post an image to a bot, however it gets posted multiple times. Unable to figure out where the loop is occuring -

i have created bot posts image whenever type after mentioning bot's name. however, bot should post image once keeps posting multiple time. appreciate in figuring out solution flaw

'use strict'; var util = require('util'); var path = require('path'); var fs = require('fs'); var bot = require('slackbots'); var http = require('http'); var sethubot = function constructor(settings) {     this.settings = settings;     this.settings.name = this.settings.name || 'mufc';     this.user = null; };  util.inherits(sethubot, bot);  sethubot.prototype.run = function() {     sethubot.super_.call(this, this.settings);     this.on('start', this._onstart);     this.on('message', this._onmessage); };  sethubot.prototype._onstart = function() {     this._loadbotuser(); };  sethubot.prototype._onmessage = function(message) {     if (this._ischatmessage(message) && !this._isfromsethubot(message)) {         this._smartresponse(message);     } };  sethubot.prototype._smartresponse = function(originalmessage) {     var self = this;     var channel = self._getchannelbyid(originalmessage.channel);     var urltoquery = '';     var firstname = '';      var = 'http://i.telegraph.co.uk/multimedia/archive/03481/david_beckham_3481418k.jpg';      self.postmessagetochannel(channel.name, a, {         as_user: true,         attachments: [{             "fallback": "required plain-text summary of theattachment.",             "color": "#36a64f",             "image_url":                 // "ts": 1         }]     }); }; sethubot.prototype._loadbotuser = function() {     var self = this;     this.user = this.users.filter(function(user) {         return user.name === self.name;     })[0]; };  sethubot.prototype._ischatmessage = function(message) {     return message.type === 'message' && boolean(message.text); };  sethubot.prototype._ischannelconversation = function(message) {     return typeof message.channel === 'string' &&         message.channel[0] === 'c'; };  sethubot.prototype._isfromsethubot = function(message) {     return message.user === this.user.id; };  sethubot.prototype._getchannelbyid = function(channelid) {     return this.channels.filter(function(item) {         return item.id === channelid;     })[0]; };  module.exports = sethubot;