#!/bin/sh

DATFILE="~/.config/youtube/dat"
CACHEDIR="~/.config/youtube/cache"
tmp1=$(mktemp)
tmp2=$(mktemp)

touch $DATFILE
mkdir -p $CACHEDIR

sync () {
    for i in $(cat $DATFILE | tr '\n' ' '); do
        curl -s \
        https://www.youtube.com/feeds/videos.xml?channel_id=$i\
        > ${CACHEDIR}/$i
    done
}
display () {
    for i in $(ls $CACHEDIR | tr '\n' ' '); do
        grep \<media:title\> ${CACHEDIR}/$i | cut -c 17- | \
        rev | cut -c 15- | rev >> $tmp1
        grep 'link rel' ${CACHEDIR}/$i | grep 'watch' | \
        cut -c31- | rev | cut -c4- | rev >> $tmp2
    done
    cat $tmp1 $tmp2 | pr -2t -s" | "
}
add () { # $1: name of channel id
    printf "%s\n" $1 >> $DATFILE
}
del () { # $1: line number of channel id
    sed -i "${1}d" $DATFILE
}
case $1 in
    *"sync"*)
        sync
        ;;
    *"add"*)
        [ $# -eq 2 ] && add $2
        ;;
    *"del"*)
        [ $# -eq 2 ] && del $2
        ;;
    *)
        display
        ;;
esac
exit 0