#!/bin/sh

#
# Given playlist URLs that could be parsed by youtube-dl generates entry via
# youtube-dl.
#


sfeedify()
{
	awk -F '\t' '
$1 == ".id" {
	id = $3
}

$1 == ".uploader" {
	author = $3
}

$1 == ".timestamp" {
        timestamp = $3
}

$1 == ".title" {
	title = $3
}

$1 == ".description" && $2 == "s" {
	content = $3
	content_type = "plain"
}

$1 == ".webpage_url" {
	link = $3
}

END {
	if (id) {
		print timestamp "\t" title "\t" link "\t" content "\t" content_type "\t" id "\t" author "\t" enclosure
	}
}
'
}


#
# Print usage messages and exit
#
usage()
{
	echo "usage: $(basename $0) [-n number_of_items] ..."
	exit 1
}


nitems=-1


while getopts n: f; do
	case $f in
	n) nitems=$OPTARG ;;
	\?) usage ;;
	esac
done
shift $((OPTIND - 1))


if [ $# -lt 1 ]; then
	usage
fi


for u in "$@"; do
	youtube-dl --playlist-end "${nitems}" -j "${u}" |
	while read -r line; do
		echo "${line}" | json2tsv | sfeedify
	done
done