# AppStorePriceWatch
# by Davis Remmel - August 2012
#
# Description: scrapes Apple's App Store product pages and alerts to changes in prices. Useful for alerting a
# potential customer about sales for watched items.
#
# Possible future additions:
# 	+ Scrape a user's iTunes wishlist
# 
#################################################################

#!/bin/sh

# Put the URL of every app you want to monitor here as part of the "APPURL[]" array
APPURL=(
	http://itunes.apple.com/us/app/frogatto/id382015046?mt=8 # Frogatto
	http://itunes.apple.com/us/app/freddi-fish-stolen-shell/id511501137?mt=8 # Freddi Fish
)

# Put the 'standard' price here so the script can detect changes
APPSTDPRICE=(
	4.99 # Frogatto
	2.99 # Freddi Fish
)

COUNT=0
for i in ${APPURL[@]}
do
	:
	APPTITLE=$(curl -s $i | perl -nle 'print for m:<title>App Store - (.*)</title>:')
	CURRENTPRICE=$(curl -s $i | perl -nle 'print for m:<li><div class="price">\$?(.*)</div></li>:')
	
	if [ "$CURRENTPRICE" != "${APPSTDPRICE[$COUNT]}" ]; then
		open $i

		DIALOG="$APPTITLE changed from \$$APPSTDPRICE to \$$CURRENTPRICE."
		osascript -e "tell application \"Finder\" to display dialog \"$DIALOG\""
	fi
	
	COUNT=$[COUNT+1]
done