sending texts via twilio to taskers when a new shift is posted

alertTaskers.js

var textClient = require('twilio')(process.env.TWILIO_ACCOUNT_SID, process.env.TWILIO_AUTH_TOKEN)
var sendText = textClient.messages.create({
      to: phone,
      from: taskiPhone,
      body: messageBody
    }, function (err, message) {
      if (err) {
        debug('Twilio error!') 
        console.log('texting error: ' + messageBody.length + ' chars')
        console.log(err)
      } else {
        console.log(`sent a text to: ${phone}: ${messageBody}`)
      }
    })  

this.alertTaskers = function (req, event) {
    let sentTexts = []
    Promise.all(event.shifts.map((s, i, a) => { // s is the new shift
      let shift = Object.assign(s, {
        venueName: event.venueName || null,
        time: moment(s.startDate).format('ha'),
        endTime: moment(s.endDate).format('ha'),
        date: moment(s.startDate).format('dddd MMMM Do'),
        company: event.company
      })
      return req.db.jobs.find({date: s.date}, {fields: {'jobid': 1, '_id': 0}})
      .then(sameDayShifts => {
        let conflictingShifts = sameDayShifts.map(cs => cs.jobid)
        return req.db.users.find({
          skills: s.position,
          status: 'Accepted',
          account_type: 'worker',
          'notificationSettings.phone_job_match': true,
          matched_jobs: { $nin: conflictingShifts }
        }, { fields: { 'distance': 1, 'email': 1, 'location': 1, 'phone_number': 1, 'name': 1, 'firstName': 1, 'userid': 1 } })
        .then(users => {
          if (users.length) {
            return Promise.all(users.map(u => {
              if (u.distance && u.location && event.location) {
                if (calculateDistance(event, u) <= u.distance && u.phone_number.length > 3 && !sentTexts.includes(u.phone_number)) {
                  sentTexts.push(u.phone_number)
                  sendText(u.phone_number, 30, u, shift, null)
                  return { email: u.email, alert: 'text sent' }
                } else { return { email: u.email, alert: 'distance was wrong or duplicate' } }
              } else { return { email: u.email, alert: 'missing fields in userdoc' } }
            }))
          } else { return { email: null, alert: 'no available users found' } }
        })
      })
    }))
  }
  this.shiftStartReminder = function (job, database, done) {
    let event = job.attrs.data.event
    database.events.findOne({eventid: event.eventid})
    .then(e => {
      console.log(`reminding an event: ${e.eventName}`)
      return Promise.all(e.all_accepted_users.map(userid => { return database.users.findOne({userid: userid}) }))
      .then(usersArray => {
        return Promise.all(usersArray.map(user => {
          let msgType = e.all_confirmed_users.includes(user.userid) ? 70 : 33
          sendText(user.phone_number, msgType, user, event, event.keyword)
          sendEmail(14, user, null, event, event.keyword)
        })).then(res => done())
      })
    })
  }