kagiya-ctr checker and notifier

kagiya.sh

#!/bin/bash
# ===================================
#    kagiya-ctr checker bash script
#
#         created by MarcusD
#       Copyright $(date +"%Y")
#
#                              :P
# ===================================

function get_raw {
	curl -k -D - -o /dev/null "https://kagiya-ctr.cdn.nintendo.net/title/0x$1/ext_key?country=$2" 2>/dev/null
}

function sendnotif {
	notify-send -t 30000 -i firefox "kagiya-ctr" "$1"
}

function testerr {
	grep "HTTP/....$1" 2>&1 >/dev/null
}


# ========================== #
# ===== [ BEGIN HERE ] ===== #
# ========================== #

COMD=''

case "$1" in
	add)
		echo "$3,$4,$2" >>~/.kagiya
        exit 0
		;;
	delall)
		rm ~/.kagiya
		exit 0
		;;
    list)
        while IFS=, read -r tid reg name
        do
            echo "$name ($tid $reg)"
        done < ~/.kagiya
        exit 0
        ;;
	loop)
		COMD="$2"
		;;
    cleanup)
        DUMMY=$(cat ~/.kagiya)
        while IFS=, read -r tid reg name
        do
            if get_raw $tid $reg | testerr 200; then
                echo "Removing $name ($tid $reg) because it came out"
                DUMMY=$(echo "$DUMMY" | grep -v "$tid,$reg,$name")
            fi
        done < ~/.kagiya
        echo "$DUMMY" >~/.kagiya
        exit 0
        ;;
	*)
		echo "Invalid command: '$1'"
        echo "Usage:"
        echo "- $0 add <gamename> <TID16> <region2>"
        echo "  - adds a game to the checklist"
        echo "- $0 list"
        echo "  - lists all games"
        echo "- $0 delall"
        echo "  - resets the checklist"
        echo "- $0 cleanup"
        echo "  - removes all released games"
        echo "- $0 loop [timeout]"
        echo "  - check stuff and loop in [timeout] intervals if [timeout] is present"
        exit 1
		;;
esac

while : ; do
	while IFS=, read -r tid reg name
    do
        if get_raw $tid $reg | testerr 200; then
            sendnotif "$name came out!"
        fi
    done < ~/.kagiya
    [ "x$COMD" == "x" ] && break
    sleep $COMD
done