youtube: also print playlist info

The plugin has been rewritten to be a little bit cleaner.

plugins/youtube

@@ -2,7 +2,7 @@
 #
 # ZyklonB YouTube plugin, displaying info about YouTube links
 #
-# Copyright 2014 Přemysl Janouch
+# Copyright 2014 - 2015, Přemysl Janouch <p.janouch@gmail.com>
 # See the file LICENSE for licensing information.
 #
 
@@ -12,85 +12,100 @@ import re
 import json
 import urllib.request
 
+class Plugin:
+	re_msg = re.compile ('(?::([^! ]*)(?:!([^@]*)@([^ ]*))? +)?'
+		'([^ ]+)(?: +(.*))?\r\n$')
+	re_args = re.compile (':?((?<=:).*|[^ ]+) *')
+
+	def parse (self, line):
+		m = self.re_msg.match (line)
+		if m is None:
+			return None
+
+		(nick, user, host, command, args) = m.groups ()
+		args = [] if args is None else self.re_args.findall (args)
+		return (nick, user, host, command, args)
+
+	def get_config (self, key):
+		print ("ZYKLONB get_config :%s" % key)
+		(_, _, _, _, args) = self.parse (sys.stdin.readline ())
+		return args[0]
+
+	def bot_print (self, what):
+		print ('ZYKLONB print :%s' % what)
+
+class YouTube (Plugin):
+	re_videos = list (map (lambda x: re.compile (x), [
+		r'youtube\.[a-z]+/[^ ]*[&?]v=([-\w]+)',
+		r'youtube\.[a-z]+/v/([-\w]+)',
+		r'youtu\.be/([-\w]+)'
+	]))
+	re_playlists = list (map (lambda x: re.compile (x), [
+		r'youtube\.[a-z]+/playlist[&?][^ ]*(?<=&|\?)list=([-\w]+)',
+	]))
+
+	def print_info (self, channel, url, cb):
+		try:
+			data = json.loads (urllib.request.urlopen
+				(url, None, 30).read ().decode ('utf-8'))
+
+			for line in map (lambda x: "YouTube: " + cb (x), data['items']):
+				print ("PRIVMSG %s :%s" % (channel,
+					line.encode ('utf-8').decode ('iso8859-1')))
+
+		except Exception as err:
+			self.bot_print ('youtube: %s' % (err))
+
+	def print_video_info (self, channel, video_id):
+		url = 'https://www.googleapis.com/youtube/v3/' \
+			+ 'videos?id=%s&key=%s&part=snippet,contentDetails,statistics' \
+			% (video_id, self.youtube_api_key)
+		self.print_info (channel, url, lambda x: "%s | %s | %sx" % (
+			x['snippet']['title'],
+			x['contentDetails']['duration'][2:].lower (),
+			x['statistics']['viewCount']))
+
+	def print_playlist_info (self, channel, playlist_id):
+		url = 'https://www.googleapis.com/youtube/v3/' \
+			+ 'playlists?id=%s&key=%s&part=snippet,contentDetails' \
+			% (playlist_id, self.youtube_api_key)
+		self.print_info (channel, url, lambda x: "%s | %d videos" % (
+			x['snippet']['title'],
+			x['contentDetails']['itemCount']))
+
+	def process_line (self, line):
+		msg = self.parse (line)
+		if msg is None:
+			return
+
+		(nick, user, host, command, args) = msg
+		if command != 'PRIVMSG' or len (args) < 2:
+			return
+
+		ctx = args[0]
+		if not ctx.startswith (('#', '+', '&', '!')):
+			ctx = nick
+
+		for regex in self.re_videos:
+			for i in regex.findall (args[1]):
+				self.print_video_info (ctx, i)
+		for regex in self.re_playlists:
+			for i in regex.findall (args[1]):
+				self.print_playlist_info (ctx, i)
+
+	def run (self):
+		self.youtube_api_key = self.get_config ('youtube_api_key')
+		if self.youtube_api_key == "":
+			self.bot_print ("youtube: missing `youtube_api_key'")
+
+		print ("ZYKLONB register")
+
+		for line in sys.stdin:
+			self.process_line (line)
+
 sys.stdin = io.TextIOWrapper (sys.__stdin__.buffer,
 	encoding = 'iso8859-1', newline = '\r\n', line_buffering = True)
 sys.stdout = io.TextIOWrapper (sys.__stdout__.buffer,
 	encoding = 'iso8859-1', newline = '\r\n', line_buffering = True)
 
-re_msg = re.compile ('(?::([^! ]*)(?:!([^@]*)@([^ ]*))? +)?'
+YouTube ().run ()
-	'([^ ]+)(?: +(.*))?\r\n$')
-re_args = re.compile (':?((?<=:).*|[^ ]+) *')
-
-def parse (line):
-	global re_msg
-	global re_args
-
-	m = re_msg.match (line)
-	if m == None:
-		return None
-
-	(nick, user, host, command, args) = m.groups ()
-	if args == None:
-		args = []
-	else:
-		args = re_args.findall (args)
-
-	return (nick, user, host, command, args)
-
-def get_config (key):
-	print ("ZYKLONB get_config :%s" % key)
-	(_, _, _, _, args) = parse (sys.stdin.readline ())
-	return args[0]
-
-def bot_print (what):
-	print ('ZYKLONB print :%s' % what)
-
-youtube_api_key = get_config ('youtube_api_key')
-if youtube_api_key == "":
-	bot_print ("youtube: missing `youtube_api_key'")
-
-print ("ZYKLONB register")
-
-regexes = list (map (lambda x: re.compile (x), [
-	'youtube\\.[a-z]+/[^ ]*[&?]v=([-_A-Za-z0-9]+)',
-	'youtube\\.[a-z]+/v/([-_A-Za-z0-9]+)',
-	'youtu\\.be/([-_A-Za-z0-9]+)'
-]))
-
-def print_video_info (channel, video_id):
-	global youtube_api_key
-	url = 'https://www.googleapis.com/youtube/v3/' \
-		+ 'videos?id=%s&key=%s&part=snippet,contentDetails,statistics' \
-		% (video_id, youtube_api_key)
-
-	try:
-		data = json.loads (urllib.request.urlopen
-			(url, None, 30).read ().decode ('utf-8'))
-
-		for x in data['items']:
-			desc = "YouTube: "
-			desc += x['snippet']['title'] + ' | '
-			desc += x['contentDetails']['duration'][2:].lower () + ' | '
-			desc += x['statistics']['viewCount'] + 'x'
-			print ("PRIVMSG %s :%s" % (channel,
-				desc.encode ('utf-8').decode ('iso8859-1')))
-
-	except Exception as err:
-		bot_print ('youtube: %s' % (err))
-
-for line in sys.stdin:
-	msg = parse (line)
-	if msg == None:
-		continue
-
-	(nick, user, host, command, args) = msg
-	if command != 'PRIVMSG' or len (args) < 2:
-		continue
-
-	ctx = args[0]
-	if not ctx.startswith (('#', '+', '&', '!')):
-		ctx = nick
-
-	for regex in regexes:
-		for i in regex.findall (args[1]):
-			print_video_info (ctx, i)