#!/bin/sh

rc="${HOME}/.ezget"

# default options
directory="${HOME}"
exclude='^$'

# read configuration
if [ -r "${rc}/config" ] ; then
	while read key value ; do
		case "${key}" in
		'directory') directory="${value/#~/"${HOME}"}" ;;
		'exclude')   exclude="${value}" ;;
		esac
	done < "${rc}/config"
fi

# download new torrents (in random order)
cat "${rc}/urls" \
| grep -v '^#' \
| shuf \
| while read url ; do
	# extract magnet links from this URL
	curl --silent --show-error "${url}" \
	| sed -e 's/&amp;/\&/g' \
	| grep -o 'magnet:?[^"]*' \
	| while read magnet ; do
		# parse each link
		xt=$(echo "${magnet}" | grep -o 'xt=urn:btih:[[:alnum:]]*')
		dn=$(echo "${magnet}" | grep -o 'dn=[^&]*')
		btih=${xt#xt=urn:btih:}
		name=${dn#dn=}
		outfile="${directory}/${btih}.torrent"

		# should we get this torrent?
		if grep -q "${btih}" "${rc}/done" 2> /dev/null ; then
			# already did
			continue
		elif echo "${name}" | grep -Eq "${exclude}" ; then
			# name matches exclude regex
			continue
		fi

		echo "Adding torrent ${name}…"
		echo "d10:magnet-uri${#magnet}:${magnet}e" > "${outfile}"
		echo "${btih}" >> "${rc}/done"
	done
done