supported_sites=(
	"hugo"
	"invidious"
	"mastodon"
	"nitter"
#	"peertube"
	"pleroma"
	"plume"
	"writefreely"
)

hugo=(
	'<meta name=(")?generator(")? content="Hugo [0-9]{1,}.[0-9]{1,}.[0-9]{1,}"( )?(/)?>'
)

invidious=(
	'<link title="Invidious" type="application/opensearchdescription\+xml" rel="search" href="/opensearch.xml">'
)

mastodon=(
	"<div class='column-1'>\n<h4>Developers</h4>\n<ul>\n<li><a href=\"https://docs.joinmastodon.org/\">Documentation</a></li>\n<li><a href=\"https://docs.joinmastodon.org/api/guidelines/\">API</a></li>\n</ul>\n</div>"
)

nitter=(
	'<meta property="og:site_name" content="Nitter"></meta>'
)

# note: we can identify PeerTube, but I don't know how to get the feed yet
#peertube=(
#	'<meta property="og:platform" content="PeerTube" />'
#)

pleroma=(
	'<noscript>To use Pleroma, please enable JavaScript.</noscript>'
	'<title>Pleroma</title>'
)

plume=(
	'<div>\n                <h3>Plume [0-9]{1,}.[0-9]{1,}.[0-9]{1,}</h3>\n                <a href="https://docs.joinplu.me">Documentation</a>\n                <a href="https://github.com/Plume-org/Plume">Source code</a>\n                <a href="https://riot.im/app/#/room/#plume:disroot.org">Matrix room</a>\n            </div>'
)

writefreely=(
	'<meta name="generator" content="Write.as">'
	'<meta name="generator" content="WriteFreely">'
)

for possible_site in ${supported_sites[@]}
do
	declare -n possible_patterns="$possible_site"
	for pattern in "${possible_patterns[@]}"
	do
		site_pattern_match=`echo "$content" |  grep -Pzo "$pattern" | tr '\0' '\n'`
		if [[ -n "$site_pattern_match" ]]
		then
			site="$possible_site"
			break
		fi
	done
	if [[ -n "$site" ]]
	then
		break
	fi
done