prisme-flow/nodes/bridge/bot/lib/chat-log.js

prisme platform flow engine

/**
 * Created by prisme.io on 09/06/2017.
 */

var _ = require('underscore')
var moment = require('moment')
var fs = require('fs')

module.exports = function (chatContext) {
  var self = {

    log: function (msg, fileName) {
      return new Promise(function (resolve) {
        if (chatContext == null || _.isEmpty(fileName)) {
          // resolve immediately if empty and do nothing
          resolve(msg)
        } else {
          fs.appendFile(fileName, self.message(msg) + '\n', function (err) {
            if (err) {
              // eslint-disable-next-line no-console
              console.error(err)
            }
            // resolve anyway, problem on logging should not stop the chatbot
            resolve(msg)
          })
        }
      })
    },

    toString: function (msg) {
      var logString = null

      if (_.isObject(msg.payload)) {
        switch (msg.payload.type) {
          case 'message':
            logString = msg.payload.content
            // logString = msg.payload.content.replace(/\n/g, '');
            break
          case 'location':
            logString = 'latitude: ' + msg.payload.content.latitude + ' longitude: ' + msg.payload.content.latitude
            break
          case 'photo':
            logString = 'image: ' + (msg.payload.filename != null ? msg.payload.filename : '<buffer>')
            break
          case 'video':
            logString = 'video: ' + (msg.payload.filename != null ? msg.payload.filename : '<buffer>')
            break
          case 'document':
            logString = 'document: ' + (msg.payload.filename != null ? msg.payload.filename : '<buffer>')
            break
          case 'audio':
            logString = 'audio: ' + (msg.payload.filename != null ? msg.payload.filename : '<buffer>')
            break
          case 'inline-buttons':
            logString = msg.payload.content + ' ' + msg.payload.buttons.map(function (button) {
              return '[' + button.label + ']'
            }).join(' ')
            break
          default:
            logString = msg.payload.content instanceof Buffer ? '<buffer>' : String(msg.payload.content)
        }
      }

      return logString
    },

    message: function (msg) {
      var chatId = chatContext.get('chatId')
      var inbound = msg.payload != null && msg.payload.inbound === true
      var firstName = chatContext.get('firstName')
      var lastName = chatContext.get('lastName')
      var logString = null

      var name = []
      if (firstName != null) {
        name.push(firstName)
      }
      if (lastName != null) {
        name.push(lastName)
      }

      if (_.isObject(msg.payload)) {
        var stringifiedMessage = this.toString(msg)
        if (!_.isEmpty(stringifiedMessage)) {
          logString = chatId + ' ' +
            (!_.isEmpty(name) ? '[' + name.join(' ') + '] ' : '') +
            (inbound ? '> ' : '< ') +
            moment().toString() + ' - ' + stringifiedMessage
        }
      }

      return logString
    }
  }

  return self
}