staffomatic-replacement-needed.sh

#!/bin/bash
# staffomatic-replacement-needed - SMS alert for the Staffomatic.com scheduling platform

# USAGE
#
# This script reads an RFC-822-formatted message from stdin and sends an SMS alert via the TextMarketer.co.uk API.
#
# Add something like this to ~/.procmailrc:
#
#   # Flags:
#   # b: Pass only body
#   # c: Continue processing filters
#   :0bc
#   * From:.*hello@staffomaticapp.com
#   * Subject: Replacement needed
#   | /path/to/staffomatic-replacement-needed
#
#
# DEPENDENCIES
#
# * URI::Escape::XS
# * jq(1)
# * sed(1)
# * bash(1)
#
# To install on Ubuntu 14.04:
#
#    sudo apt-get install liburi-escape-xs-perl jq sed bash
#
# * Google.com API account & key
# * TextMarketer.co.uk funded account with login & password
#
# Create a private (chmod 0600) file ~/.shadow, and populate it with the secrets:
#
#   # https://console.developers.google.com/apis/credentials
#   GOOGLE_API_KEY=AIzaSyBQ0gWCJ2Ckdl6UKJ-4JlpABnsjuWKivGg
#   # https://messagebox.textmarketer.co.uk/
#   SMS_GATEWAY_USER_NAME=yby9E6
#   SMS_GATEWAY_PASS_PHRASE=Vw8bVD


set -e

function debug()
{
  : echo "$*"
}

function shorturl()
{
  set -x
  source ~/.shadow

  if test x"$GOOGLE_API_KEY" = x; then echo GOOGLE_API_KEY not set - must be set as an environment variable or in ~/.shadow >&2; exit 2; fi

  curl -s "https://www.googleapis.com/urlshortener/v1/url?key=${GOOGLE_API_KEY}" \
       -H 'Content-Type: application/json' \
       -d "{'longUrl': '$*'}" \
  | jq .id \
  | sed 's/"//g'

}

function urlEscape()
{
  perl -M'URI::Escape::XS qw/uri_escape/' \
       -e 'print uri_escape($ARGV[0]);' \
       "$*"
}

function sendSms()
{
  escapedSmsBody="$( urlEscape "$sms" )"
  debug escapedSmsBody: "$escapedSmsBody"

  base=https://api.textmarketer.co.uk/gateway
  phoneNumber=447542894196

  source ~/.shadow

  if test x"$SMS_GATEWAY_USER_NAME" = x -o x"$SMS_GATEWAY_PASS_PHRASE" = x; then echo SMS_GATEWAY_USER_NAME or SMS_GATEWAY_PASS_PHRASE not set - must be set as an environment variable or in ~/.shadow >&2; exit 2; fi
  
  url="${base}/?username=${SMS_GATEWAY_USER_NAME}&password=${SMS_GATEWAY_PASS_PHRASE}&to=${phoneNumber}&message=${escapedSmsBody}&orig=rdancer"
  debug SMS gateway request URL: "$url"

  response="$( curl "$url" 2>/dev/null )"
  debug API Response: "$response"
  debug Exit code: $?
}

while read line; do
  debug -- x$line
  case x$line in
    xStart:)
      read startTime
      debug startTime: $startTime
    ;;

    xEnd:)
      read endTime
      debug endTime: $endTime
    ;;

    # Donald Duck is looking for a replacement for the folllowing shift Mo, 27.06:
    x*"looking for a replacement"*)
      # Translate to English, strip punctuation, and normalize (note: sometimes the
      # abbreviation is German 2-letter, sometimes English 2-letter, and
      # sometimes English 3-letter!)
      #
      # "Di, 27.06:" -> "Tue 27/06"
      # "Su, 10.07:" -> "Sun 10/07"
      #
      # Deutsch     English
      # ---------------------
      # Montag      Monday
      # Dienstag    Tuesday
      # Mittwoch    Wednesday
      # Donnerstag  Thursday
      # Freitag     Friday
      # Samstag     Saturday
      # Sonntag     Sunday
      date="`echo $line | sed 's/.*shift //;s/[,:]//g;s/\./\//' | sed 's/Mo/Mon/;s/Di/Tue/;s/Mi/Wed/;s/Do/Thu/;s/Fr/Fri/;s/Sa/Sat/;s/So/Sun/' | sed 's/Mo/Mon/;s/Tu/Tue/;s/We/Wed/;s/Th/Thu/;s/Fr/Fri/;s/Sa/Sat/;s/Su/Sun/;'`"
      debug date: $date
    ;;

    # Go to shift: https://deliveroo-uk.staffomaticapp.com/#locations/13862/schedules/219331/shifts/9159470/applications
    x"Go to shift:"*)
      url="`echo $line | sed 's/.* http/http/'`"
      break
    ;;
  esac
done

shortUrl="`shorturl $url`"
debug shortUrl: "$shortUrl"

sms="$( echo -e "Deliveroo: replacement needed $date $startTime-$endTime\\n$shortUrl" )"
debug sms: "$sms"

sendSms "$sms"