From 1966c07afa2c77e0da59a60b34b1a9e12eadcbde Mon Sep 17 00:00:00 2001
From: Pablo Martín Báez Echevarría
Date: Sat, 20 Dec 2014 22:35:14 -0200
Subject: Add clones_scanner.pl

---
 _data/scripts.yaml        |  10 ++
 scripts/clones_scanner.pl | 297 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 307 insertions(+)
 create mode 100644 scripts/clones_scanner.pl

diff --git a/_data/scripts.yaml b/_data/scripts.yaml
index a823da2..f113260 100644
--- a/_data/scripts.yaml
+++ b/_data/scripts.yaml
@@ -886,6 +886,16 @@
   url: "http://irssi.dgl.cx/"
   version: "2.01"
 
+- authors: "Pablo Martín Báez Echevarría"
+  contact: "pab_24n@outlook.com"
+  description: "when a nick joins #channel, notifies you if there is (or there has been) someone in #channel with the same hostname"
+  filename: "clones_scanner.pl"
+  modified: "2014-12-20 22:30:25"
+  license: "Public domain"
+  name: "clones_scannner"
+  url: "http://reirssi.wordpress.com"
+  version: "1.5"
+
 - authors: "Gabor Nyeki"
   contact: "bigmac@vim.hu"
   description: "kicking users for using colors or blinks"
diff --git a/scripts/clones_scanner.pl b/scripts/clones_scanner.pl
new file mode 100644
index 0000000..1f31fbb
--- /dev/null
+++ b/scripts/clones_scanner.pl
@@ -0,0 +1,297 @@
+use strict;
+use warnings;
+
+{ package Irssi::Nick }
+# just in case, to avoid Irssi::Nick warnings ( see http://bugs.irssi.org/index.php?do=details&task_id=242 )
+
+use Irssi;
+use vars qw($VERSION %IRSSI);
+
+# Thanks to noi_esportista!#Girona@chathispano for his suggestions about how this script should work.
+
+$VERSION = '1.5';
+%IRSSI = (
+	authors     => 'Pablo Martín Báez Echevarría',
+	contact     => 'pab_24n@outlook.com',
+	name        => 'clones_scanner',
+	description => 'when a nick joins #channel, notifies you if there is (or there has been) someone in #channel with the same hostname',
+	license     => 'Public Domain',
+	url         => 'http://reirssi.wordpress.com',
+	changed     => '22:30:25, Dec 20th, 2014 UYT',
+);
+
+#
+# USAGE
+# =====
+# Copy the script to ~/.irssi/scripts/
+#
+# In irssi:
+#          /run clones_scanner
+#
+#
+# OPTIONS
+# =======
+# Settings can be resetted to defaults with /set -default
+#
+# /set clones_scanner_maxtime <time>
+# * This is the maximum time in which the script remembers that a specific hostname 
+#   left a channel because of a PART, QUIT or KICK event (default is 900secs = 15mins).
+#   For example, suppose it is 1 hour. If someone with mask type nick1!*@host left #channel 
+#   at 11:00 and then comes back at 12:01 with mask type nick2!*@host, you will not be 
+#   notified that 'nick2' was seen earlier in #channel as 'nick1'. 
+#   It must be a time type, that is a series of integers with optional unit specifiers.
+#   Valid specifiers are:
+#
+#   d[ays]
+#   h[ours]
+#   m[inutes]
+#   s[econds]
+#   mil[liseconds] | ms[econds]
+#
+#   Any unambiguous part of a specifier can be used, as shown by the strings in braces in 
+#   the above list. Multiple specifiers can be combined, with or without spaces between them.
+#
+#   Examples:
+#
+#   /set clones_scanner_maxtime 1hour30mins
+#   /set clones_scanner_maxtime 2h
+#   /set clones_scanner_maxtime 3h 10secs
+#
+#   There must not be a space between the number and the unit specifier.
+#
+#
+# COMMANDS
+# ========
+# /clones_scanner_size
+# * Displays how many entries the data structure where the hosts are stored has, and how much 
+#   memory is used for that purpose.
+#
+#   WARNING: This feature requires Devel::Size module. It seems that when installing Devel::Size
+#            some tests started to fail since Perl 5.19.3 so if you're using the latest Perl release 
+#            (Perl 5.20.1) you'll have to wait for someone to fix Devel::Size for recent Perl versions.
+#            See more about this issue at: https://rt.cpan.org/Public/Bug/Display.html?id=95493
+#            Remeber that you can find out Perl version with
+#            $ perl -v
+#            in a terminal or alternatively executing /script exec print $^V in irssi.
+#
+
+
+Irssi::settings_add_time('clones_scanner', 'clones_scanner_maxtime', 900);
+
+# global variables
+my $have_devel_size = eval { require Devel::Size };
+my %hosts_hash  = ();
+my $old_maxtime_msecs;
+my $old_maxtime_str;
+my $total_entries = 0;
+
+##########
+
+sub add_entry {
+  my ( $network, $channel, $address, $nick ) = @_;
+  
+  (my $host = $address) =~ s/^[^@]+@//;
+
+  if (defined $hosts_hash{$network}{$channel}{$host}) {
+    my $old_tag = $hosts_hash{$network}{$channel}{$host}[2];
+    Irssi::timeout_remove( $old_tag );
+    $total_entries--;
+  }
+  
+  my $time = Irssi::settings_get_time("clones_scanner_maxtime");
+  my @data = ( $network, $channel, $host );
+  my $tag  = Irssi::timeout_add_once($time, "remove_entry", \@data);
+
+  my $entry = [$nick, time(), $tag];
+  $hosts_hash{$network}{$channel}{$host} = $entry;
+  $total_entries++;
+  
+}
+
+sub str_time {
+  my ( $secs ) = @_;
+  
+  my $d = int($secs/3600/24);
+  my $h = int($secs/3600%24);
+  my $m = int($secs/60%60);
+  my $s = int($secs%60);
+  
+  my $d_str = ($d == 1) ? "day": "days";
+  my $h_str = ($h == 1) ? "hour": "hours";
+  my $m_str = ($m == 1) ? "minute": "minutes";
+  my $s_str = ($s == 1) ? "second": "seconds";
+  
+  my $raw_str = $d.$d_str.", ".$h.$h_str.", ".$m.$m_str.", ".$s.$s_str;
+  
+  (my $str_res = $raw_str) =~ s/\b0\w+(?:,\s)?//g;
+  ($str_res    = $str_res) =~ s/,\s$//;
+  ($str_res    = $str_res) =~ s/(\d)([dhms])/$1 $2/g; 
+  
+  return $str_res eq "" ? "less than 1 second" : $str_res;
+}
+
+sub remove_entry {
+  my ( $ref_data ) = @_;
+  
+  my $network = @{$ref_data}[0];
+  my $chan    = @{$ref_data}[1];
+  my $host    = @{$ref_data}[2];
+  
+  delete $hosts_hash{$network}{$chan}{$host};
+  $total_entries--;
+  delete $hosts_hash{$network}{$chan} if (!keys %{$hosts_hash{$network}{$chan}});
+  delete $hosts_hash{$network} if (!keys %{$hosts_hash{$network}});
+}
+
+sub update_hash {
+  my ( $nw_maxtime ) = @_;
+  my $remainder;
+  my $ni;
+  my $se;
+  my $tg;
+  my $nw_tg;
+
+  foreach my $network (keys %hosts_hash) {
+    foreach my $channel (keys %{$hosts_hash{$network}}) {
+      foreach my $host (keys %{$hosts_hash{$network}{$channel}}) {
+        $ni = @{$hosts_hash{$network}{$channel}{$host}}[0];
+        $se = @{$hosts_hash{$network}{$channel}{$host}}[1];
+        $tg = @{$hosts_hash{$network}{$channel}{$host}}[2];
+        Irssi::timeout_remove( $tg );
+        $remainder = $nw_maxtime - (time() - $se);
+        if( $remainder > 0 ) {
+          my @data = ( $network, $channel, $host );
+          $nw_tg   = Irssi::timeout_add_once( $remainder*1000, "remove_entry", \@data);
+          $hosts_hash{$network}{$channel}{$host} = [$ni, $se, $nw_tg];
+        } else {
+          delete $hosts_hash{$network}{$channel}{$host};
+          $total_entries--;
+        }
+      }
+      delete $hosts_hash{$network}{$channel} if (!keys %{$hosts_hash{$network}{$channel}});
+    }
+    delete $hosts_hash{$network} if (!keys %{$hosts_hash{$network}});
+  }
+  
+}
+
+sub setup_changed {
+  my $new_maxtime_msecs = Irssi::settings_get_time("clones_scanner_maxtime");
+  if($new_maxtime_msecs < 10) {
+    Irssi::print("Invalid timestamp (must be >= 10 msecs)", MSGLEVEL_CLIENTERROR);
+    Irssi::settings_set_time("clones_scanner_maxtime", $old_maxtime_str);
+    $new_maxtime_msecs = Irssi::settings_get_time("clones_scanner_maxtime");
+  }
+  update_hash(int($new_maxtime_msecs/1000)) if ($new_maxtime_msecs != $old_maxtime_msecs);
+}
+
+##########
+
+sub part_method {
+  my ($server, $channel, $nick, $address, $reason) = @_;
+
+  add_entry($server->{tag}, $channel, $address, $nick);
+}
+
+sub quit_method {
+  my ($server, $nick, $address, $reason) = @_;
+
+  foreach($server->channels()) {
+    if ($_->nick_find($nick)) {
+      add_entry($server->{tag}, $_->{name}, $address, $nick);
+    }
+  }
+}
+
+sub kick_method {
+  my ($server, $channel, $nick, $kicker, $address, $reason) = @_;
+  
+  Irssi::signal_stop();
+  my $kicked_address = $server->channel_find($channel)->nick_find($nick)->{host};
+  Irssi::signal_continue(@_);
+  add_entry($server->{tag}, $channel, $kicked_address, $nick);
+}
+
+##########
+
+sub join_method {
+  my ($server, $channel, $nick, $address) = @_;
+  
+  Irssi::signal_continue(@_);
+  
+  my $servtag  =  $server->{tag};
+  (my $host    = $address) =~ s/^[^@]+@//;
+  my $chan_rec = $server->channel_find($channel);
+
+  # ==== find clones ====
+  my $ni_host;
+  my $str_clones = "";
+  my @clones;
+  foreach my $ni ($chan_rec->nicks()) {
+    ($ni_host = "$ni->{host}") =~ s/^[^@]+@//;
+    if ( ($ni->{nick} ne $nick)&&($ni_host eq $host) ) {
+      $str_clones .= "$ni->{nick}".", ";
+      push @clones, $ni->{nick};
+    }
+  }
+  if( $str_clones ne "") {
+    ($str_clones = $str_clones) =~ s/,\s$//;
+    $chan_rec->printformat(Irssi::MSGLEVEL_JOINS, "clones_scanner_clones", $nick, $str_clones);
+  }
+  
+  # ==== search in %hosts_hash ====
+  my $exists_nick_in_hash = (defined $hosts_hash{$servtag})&&(defined $hosts_hash{$servtag}{$channel})
+  &&(defined $hosts_hash{$servtag}{$channel}{$host});
+  
+  if ($exists_nick_in_hash) {
+    my @alias = @{ $hosts_hash{$servtag}{$channel}{$host} };
+    if ( ($nick ne $alias[0]) && (!(grep {$_ eq $alias[0]} @clones)) ) {
+      my $time = Irssi::settings_get_time("clones_scanner_maxtime");
+      $chan_rec->printformat( Irssi::MSGLEVEL_JOINS, "clones_scanner_track_nick", $nick, str_time(int($time/1000)), 
+      $alias[0], str_time(time()-$alias[1]));
+    }
+  }
+
+}
+
+##########
+
+Irssi::theme_register([
+    "clones_scanner_clones", 'Clones of {nick $0}: $1',
+    "clones_scanner_track_nick", '=> {nick $0} was seen during the last $1 as {nick $2} ($3 ago)',
+]);
+
+##########
+
+
+if ($have_devel_size) {
+  
+  sub clones_scanner_size_cmd {
+    #use Data::Dumper;
+    #print Dumper(\%hosts_hash);
+    my $bytes = Devel::Size::total_size(\%hosts_hash);
+    print "Number of entries in \%hosts_hash: ", $total_entries;
+    print "Size in bytes: ".$bytes;
+    print int($bytes/1024/1024)."MB ".int($bytes/1024%1024)."kB ".int($bytes%1024)."B of data";
+  }
+  Irssi::command_bind('clones_scanner_size' , \&clones_scanner_size_cmd);
+
+} else {
+
+  print "Missing Devel::Size module. The command `/clones_scanner_size` will not be available.";
+
+}
+
+Irssi::signal_add_first('message part', \&part_method); 
+Irssi::signal_add_first('message quit', \&quit_method);
+Irssi::signal_add_first('message kick', \&kick_method);
+
+Irssi::signal_add_last('message join', \&join_method);
+
+Irssi::signal_add_last('setup changed', \&setup_changed);
+
+Irssi::signal_add_first('send command', 
+sub { 
+ $old_maxtime_msecs = Irssi::settings_get_time("clones_scanner_maxtime");
+ $old_maxtime_str   = Irssi::settings_get_str("clones_scanner_maxtime");
+});
-- 
cgit v1.2.3