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
 
-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)
-
+class Plugin:
 	re_msg = re.compile ('(?::([^! ]*)(?:!([^@]*)@([^ ]*))? +)?'
 		'([^ ]+)(?: +(.*))?\r\n$')
 	re_args = re.compile (':?((?<=:).*|[^ ]+) *')
 
-def parse (line):
-	global re_msg
-	global re_args
-
-	m = re_msg.match (line)
-	if m == None:
+	def parse (self, line):
+		m = self.re_msg.match (line)
+		if m is None:
 			return None
 
 		(nick, user, host, command, args) = m.groups ()
-	if args == None:
-		args = []
-	else:
-		args = re_args.findall (args)
-
+		args = [] if args is None else self.re_args.findall (args)
 		return (nick, user, host, command, args)
 
-def get_config (key):
+	def get_config (self, key):
 		print ("ZYKLONB get_config :%s" % key)
-	(_, _, _, _, args) = parse (sys.stdin.readline ())
+		(_, _, _, _, args) = self.parse (sys.stdin.readline ())
 		return args[0]
 
-def bot_print (what):
+	def bot_print (self, 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]+)'
+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_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)
-
+	def print_info (self, channel, url, cb):
 		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'
+			for line in map (lambda x: "YouTube: " + cb (x), data['items']):
 				print ("PRIVMSG %s :%s" % (channel,
-				desc.encode ('utf-8').decode ('iso8859-1')))
+					line.encode ('utf-8').decode ('iso8859-1')))
 
 		except Exception as err:
-		bot_print ('youtube: %s' % (err))
+			self.bot_print ('youtube: %s' % (err))
 
-for line in sys.stdin:
-	msg = parse (line)
-	if msg == None:
-		continue
+	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:
-		continue
+			return
 
 		ctx = args[0]
 		if not ctx.startswith (('#', '+', '&', '!')):
 			ctx = nick
 
-	for regex in regexes:
+		for regex in self.re_videos:
 			for i in regex.findall (args[1]):
-			print_video_info (ctx, i)
+				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)
+
+YouTube ().run ()