Automatic iOS firmware downloader

lookForNewiOS.sh

#!/bin/bash
# lookForNewiOS.sh
# Author: Luca Zorzi (@LucaTNT)
# Version: 0.2 (2014/11/20)
# License: BSD
# -----------------------------
# This scripts uses icj.me's API to check if there are new iOS releases for
# the iOS devices specified in the MODELS array. You can put any number of devices, 
# as long as they are in an array (space separated, enclosed in brackets).
# If a new release is available, it gets download into the DESTINATION_FOLDER, respecting
# SPEED_LIMIT for each download: so if say you set SPEED_LIMIT to 1M and you want to download
# firwares for 5 devices, you will end up using (up to) 5 megabyte/s of bandwidth.
# The download will be handled in background by wget. You will be told wget's PID and log file.
# I suggest that you put this script in your crontab to execute it automatically at night.
# If no new versions of iOS are found and older versions of iOS are still present in the
# destination folder, they will be deleted.

MODELS=(iPhone5,2 iPhone5,4 iPhone7,2 iPad4,2 iPad5,4)
DESTINATION_FOLDER="/var/www/iOS/"
SPEED_LIMIT="500k"


pushd $DESTINATION_FOLDER > /dev/null

function downloadFirmware
{
	wget -b --limit=$SPEED_LIMIT $1
}

for model in ${MODELS[@]}
do
	URL="`wget -q -O - http://api.ios.icj.me/v2/$model/latest/url`"
	FILENAME=${URL##*/}
	if [ ! -f $FILENAME ]
	then
		echo "New iOS release available for device $model"
		echo "Starting download from $URL"
		downloadFirmware $URL
	else
		echo "No new iOS release for device $model"
		if [ `ls $model* | wc -l` -gt 1 ]
		then
			echo "Found older firmware version(s) for $model, I'm deleting them."
			OLD_VERSION="`ls $model* | grep -v $FILENAME`"
			rm -f $OLD_VERSION
		fi
	fi
	echo "----------------------------------------------------------------"
done

# Delete old wget-log files
find . -name wget-log\* -mtime +1 -exec rm {} \;

popd > /dev/null