# determine whether HTTP or HTTPS
# Tor instances may not use HTTPS
determine_protocol

get_domain

instance=${protocol}${domain}

# get feed if able
channel_id=""
list=""
if [[ $url == *"/channel/"* ]]
then
	channel_id=${url#*/channel/}
# Invidious just redirects /user/ to /channel/ anyway
elif [[ $url == *"/user/"* ]]
then
	channel_id=${url#*/user/}
# playlist
elif [[ $url == *"&list="* ]]
then
	list=${url#*&list=}
	list=${list%%&*}
fi

# trim extra arguments
channel_id=${channel_id%%\?*}
channel_id=${channel_id%%\&*}

if [[ -n $channel_id ]]
then
	channel_id=${channel_id%%/*}
	rss="${instance}/feed/channel/${channel_id}"
	url_ext=$rss
elif [[ -n $list ]]
then
	rss="${instance}/feed/playlist/${list}"
	url_ext=$rss
fi