Added a `youtube' plugin

Written for Python 3, it just shows info about random YouTube links.

plugins/youtube

@@ -0,0 +1,96 @@
+#!/usr/bin/env python3
+#
+# ZyklonB YouTube plugin, displaying info about YouTube links
+#
+# Copyright 2014 Přemysl Janouch.  All rights reserved.
+# See the file LICENSE for licensing information.
+#
+
+import sys
+import io
+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)
+
+re_msg = re.compile ('(?::([^! ]*)(?:!([^@]*)@([^ ]*))? +)?'
+	'([^ ]+)(?: +(.*))?\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'")
+
+youtube_api_key = 'AIzaSyCcmzr0KkBKFv5y1oLuEB4ZZ9y_SQkJgSQ'
+
+print ("ZYKLONB register")
+
+re_link_1 = re.compile ('youtube\\.[a-z]+/[^ ]*[&?]v=([-_A-Za-z0-9]+)')
+re_link_2 = re.compile ('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 i in re_link_1.findall (args[1]):
+		print_video_info (ctx, i)
+	for i in re_link_2.findall (args[1]):
+		print_video_info (ctx, i)