Channel.tcl
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Channel.tcl
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	# #wolfplex
	bind pubm - "#wolfplex *" pubm:url
	bind pubm - "#fauve *" pubm:url
	bind sign - "#wikipedia-fr !@*" sign:excessflood

	#
	# URL management
	#

	#Determines if the URL matches a video site url:getvideotitle can handle
	proc url:isvideo {url} {
	foreach site "youtu.be metacafe.com dailymotion video.google.com photobucket.com video.yahoo.com youtube.com depositfiles.com vimeo.com" {
	if {[string first $site $url] > -1} {
	return 1
	}
	}
	return 0
	}

	#Gets video title
	proc url:getvideotitle {url} {
	set title ""
	catch {
	set title [exec -- youtube-dl -e $url]
	}
	return $title
	}

	#This proc allows to handle URLs in lines
	#Currently, it prints the video title when not provided with the URL
	#TODO: checks 402/403/404/500 error codes
	proc pubm:url {nick uhost handle channel text} {
	foreach url [geturls $text] {
	if [url:isvideo $url] {
	#Prints video information on the channel
	#if it's not already in $text
	set info [url:getvideotitle $url]
	if {[string length [string trim $info]] > 0 && [string first $info $text] == -1} {
	putserv "PRIVMSG $channel :\[Vid\] $info"
	}
	}
	}
	}

	#
	# #wikipedia-fr botnet mitigation
	#

	proc isbotnetsuspecthost {host} {
	if [isip $host] {
	return 1
	}
	foreach domain [registry get protection.botnet.hosts] {
	if [string match $domain $host] {
	return 1
	}
	}
	return 0
	}

	proc isfloodquitmessage {reason} {
	foreach floodreason [registry get protection.botnet.reasons] {
	if [string match $reason $floodreason] {
	return 1
	}
	}
	return 0
	}

	proc sign:excessflood {nick uhost handle channel reason} {
	global botname

	# We're interested by unknown users quitting with Excess Flood message.
	if {![isfloodquitmessage $reason] \|\| $handle != "*"} {
	return
	}

	# Botnet nicks have 3 to 5 characters
	set len [strlen $nick]
	if {$len < 3 \|\| $len > 5} {
	return
	}

	# And belong to specific ISPs
	set host [gethost $uhost]
	if [isbotnetsuspecthost $host] {
	newchanban $channel !@$host $botname [registry get protection.botnet.banreason] [registry get protection.botnet.banduration] sticky
	sql "INSERT INTO log_flood (host, `count`) VALUES ('[sqlescape $host]', 1) ON DUPLICATE KEY UPDATE `count` = `count` + 1;"
	}
	}

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