Check if Destiny Ghost is in stock on Amazon

gistfile1.txt

#!/bin/bash

URL='http://www.amazon.com/Destiny-Ghost-Xbox-One/dp/B00LH6C6VW/ref=sr_1_1?s=videogames&ie=UTF8&qid=1407613552&sr=1-1&keywords=xbox+one+destiny+ghost'
USER_AGENT='Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.2) Gecko/20090729 Firefox/4.5.2 GTB5'
SEARCH_TERM='<span class="availRed">Sign up to be notified when this item becomes available.</span>'
EMAIL="name@email.com"
PHONE_ADDRESS="1234567890@provider.com"
SUCCESS_COUNT=0

send_mail () {
  ADDRESS=$1

  cat << EOF | /usr/bin/osascript
tell application "Mail"
  set newMessage to make new outgoing message with properties {subject: "Ghost Edition is in Stock", content: "Go buy it! $URL", visible:true}
  tell newMessage
    make new to recipient at the end of to recipients with properties {address:"$ADDRESS"}
    send
  end tell
end tell
EOF
}

notifier () {
  MSG_TITLE=$1
  MSG_TEXT=$2

  osascript -e "display notification \"$MSG_TEXT\" with title \"$MSG_TITLE\""
}

while :; do
  curl -s -H "user-agent: $USER_AGENT"  $URL | grep "$SEARCH_TERM" > /dev/null

  if [[ $? -ne 0 ]]; then
    SUCCESS_COUNT=$((SUCCESS_COUNT + 1))
  else
    SUCCESS_COUNT=0
  fi
  
  # Require 3 consecutive successes to prevent false positives
  if [[ $SUCCESS_COUNT == 3 ]]; then
    echo "In Stock!"
    notifier "Destiny" "Ghost Edition in stock on Amazon!"
    send_mail $EMAIL
    send_mail $PHONE_ADDRESS
    exit 0
  fi

  sleep 30

done