Add librefm plugin

copypasta of drews lastfm

plugins/librefm.lua

@@ -0,0 +1,101 @@
+local command = 'librefm'
+local doc = [[```
+/lnp [username]
+Returns what you are or were last listening to. If you specify a username, info will be returned for that username.
+
+/lfmset <username>
+Sets your last.fm username. Otherwise, /np will use your Telegram username. Use "/fmset -" to delete it.
+```]]
+
+local triggers = {
+	'^/libre[@'..bot.username..']*',
+	'^/lnp[@'..bot.username..']*',
+	'^/lfmset[@'..bot.username..']*'
+}
+
+local action = function(msg)
+
+	lastfm = load_data('librefm.json')
+	local input = msg.text:input()
+
+	if string.match(msg.text, '^/librefm') then
+		sendMessage(msg.chat.id, doc, true, msg.message_id, true)
+		return
+	elseif string.match(msg.text, '^/lfmset') then
+		if not input then
+			sendMessage(msg.chat.id, doc, true, msg.message_id, true)
+		elseif input == '-' then
+			lastfm[msg.from.id_str] = nil
+			sendReply(msg, 'Your last.fm username has been forgotten.')
+		else
+			lastfm[msg.from.id_str] = input
+			sendReply(msg, 'Your last.fm username has been set to "' .. input .. '".')
+		end
+		save_data('librefm.json', lastfm)
+		return
+	end
+
+	local url = 'http://alpha.libre.fm/2.0/?method=user.getrecenttracks&format=json&limit=1&api_key=0&user='
+
+	local username
+	local output = ''
+	if input then
+		username = input
+	elseif lastfm[msg.from.id_str] then
+		username = lastfm[msg.from.id_str]
+	elseif msg.from.username then
+		username = msg.from.username
+		output = '\n\nYour username has been set to ' .. username .. '.\nTo change it, use /lfmset <username>.'
+		lastfm[msg.from.id_str] = username
+		save_data('lastfm.json', lastfm)
+	else
+		sendReply(msg, 'Please specify your last.fm username or set it with /lfmset.')
+		return
+	end
+
+	url = url .. URL.escape(username)
+
+	jstr, res = HTTPS.request(url)
+	if res ~= 200 then
+		sendReply(msg, config.errors.connection)
+		return
+	end
+
+	local jdat = JSON.decode(jstr)
+	if jdat.error then
+		sendReply(msg, 'Please specify your last.fm username or set it with /lfmset.')
+		return
+	end
+
+	local jdat = jdat.recenttracks.track[1] or jdat.recenttracks.track
+	if not jdat then
+		sendReply(msg, 'No history for this user.' .. output)
+		return
+	end
+
+	local message = input or msg.from.first_name
+	message = '🎵  ' .. message
+
+	if jdat['@attr'] and jdat['@attr'].nowplaying then
+		message = message .. ' is currently listening to:\n'
+	else
+		message = message .. ' last listened to:\n'
+	end
+
+	local title = jdat.name or 'Unknown'
+	local artist = 'Unknown'
+	if jdat.artist then
+		artist = jdat.artist['#text']
+	end
+
+	message = message .. title .. ' - ' .. artist .. output
+	sendMessage(msg.chat.id, message)
+
+end
+
+return {
+	action = action,
+	triggers = triggers,
+	doc = doc,
+	command = command
+}