irssi/docs/perl.txt

 Installation problems
 ---------------------

You'll need to have perl support compiled with irssi. If "/LOAD"
doesn't show perl in list of loaded modules, you have a problem. See
INSTALL file for information about perl problems.


 Running scripts
 ---------------

Scripts are run with /SCRIPT LOAD command, or the default /RUN alias.
"/SCRIPT" shows list of running scripts, and /SCRIPT UNLOAD can unload
scripts.

Scripts should be placed to ~/.irssi/scripts/ or
/usr/local/lib/irssi/scripts/ (or depending on where irssi was
installed) directories. After that /RUN script_name should work, you
don't need to add the .pl suffix.


 Irssi's signals
 ---------------

Irssi is pretty much based on sending and handling different signals.
Like when you receive a message from server, say

  :nick!user@there.org PRIVMSG you :blahblah

Irssi will first send a signal:

  "server incoming", SERVER_REC, "nick!user@there PRIVMSG ..."

You probably don't want to use this signal. Default handler for this
signal interprets the header and sends a signal:

  "server event", SERVER_REC, "PRIVMSG ...", "nick", "user@there.org"

You probably don't want to use this either, since this signal's default
handler parses the event string and sends a signal:

  "event privmsg", SERVER_REC, "you :blahblah", "nick", "user@there.org"

You can at any point grab the signal, do whatever you want to do with
it and optionally stop it from going any further by calling
Irssi::signal_stop();

For example:

  sub event_privmsg {
    # $data = "nick/#channel :text"
    my ($server, $data, $nick, $address) = @_;
    my ($target, $text) = split(/ :/, $data, 2);

    Irssi::signal_stop() if ($text =~ /free.*porn/ || $nick =~ /idiot/);
  }

Irssi::signal_add("event privmsg", "event_privmsg")

This will hide all public or private messages that match the regexp
"free.*porn" or the sender's nick contain the word "idiot". Yes, you
could use /IGNORE instead for both of these :)

You can also use signal_add_last() if you wish to let the Irssi's internal
functions be run before yours.

A list of signals that irssi sends can be found from signals.txt file.


 Creating/replacing /COMMANDS
 ----------------------------

You can create your own commands, or replace existing ones with
Irssi::command_bind(). The command handling work internally pretty much
the same as signal handlers, so if you replace existing command and don't
wish to let it run, call Irssi::signal_stop().

Here's an example:

  # Usage: /HELLO [<nick>]
  sub cmd_hello {
    # data - contains the parameters for /HELLO
    # server - the active server in window
    # witem - the active window item (eg. channel, query)
    #         or undef if the window is empty
    my ($data, $server, $witem) = @_;

    if (!$server || !$server->{connected}) {
      Irssi::print("Not connected to server");
      return;
    }

    if ($data) {
      $server->command("MSG $data Hello!");
    } elsif ($witem && ($witem->{type} eq "CHANNEL" ||
                        $witem->{type} eq "QUERY")) {
      # there's query/channel active in window
      $witem->command("MSG ".$witem->{name}." Hello!");
    } else {
      Irssi::print("Nick not given, and no active channel/query in window");
    }
  }

  Irssi::command_bind('hello', 'cmd_hello');


 Message levels
 --------------

Several functions expect message levels. They're used to roughly
classify messages. They're used by a lot of things including logging,
ignoring, highlighting, etc. so you should use as good level as
possible. It's possible to have several levels in one message, like
ACTIONS+PUBLIC or ACTIONS+MSGS.

Here's all the levels that irssi supports currently:

  CRAP, MSGS, PUBLIC, NOTICES, SNOTES, CTCPS, ACTIONS, JOINS, PARTS
  QUITS, KICKS, MODES, TOPICS, WALLOPS, INVITES, NICKS, DCC, DCCMSGS,
  CLIENTNOTICE, CLIENTCRAP, CLIENTERROR

And a few special ones that could be included with the levels above:

  HILIGHT - text is highlighted
  NOHILIGHT - don't check highlighting for this message
  NO_ACT - don't trigger channel activity when printing this message
  NEVER - never ignore or log this message (not a good idea usually)

You can use them with a MSGLEVEL_ prefix, for example:

  $server->print("#channel", 'Hello, world', MSGLEVEL_CLIENTCRAP);

Writes text to #channel window with CLIENTCRAP level.


 Window items
 ------------

Meaning of "window" should be pretty clear, but "window item" is
something I couldn't really figure out a better name for :) They're
simply something that's inside a window, a channel or a query usually.
Windows can have multiple items inside them. It's possible to create
non-channel/query window items too, currently the third possible window
item is created by /EXEC -interactive.

In scripts, I think you can quite safely assume that the window item is
query or channel if the script is intended to be run in one of them.
Stupid users won't probably have other window items, and smart users
know where to run the script, or at least later figure out why it
didn't work :)


 Functions that you can use in Irssi's Perl scripts
 --------------------------------------------------

If there's a "Xxxx::" text before the command, it means that it belongs to
that package. Like "Server::command" means that you should either call it as
  Irssi::Server::command($server, $cmd);
or more easily:
  $server->command($cmd);

Commands that don't have the Xxxx prefix are called as Irssi::command();

Information from most objects can be fetched with $object->{data}, for
example current nick in server could be read with $server->{nick}. List
of all the information that are in objects are in "Object->{}" sections
below.

Commands are split in two groups, generic ones that could be used with
any chat protocol, and IRC specific commands. If you want to use IRC
specific commands, or use IRC specific ->{data} in your scripts, you'll
need to add "use Irssi::Irc" to your scripts. IRC specific commands are
listed after the generic ones.


 *** General

Window active_win() - return active window
Server active_server() - return server in active window

get_irssi_dir() - returns the absolute path to the user configuration
  directory - either the value passed to --home at startup, or ~/.irssi

windows() - return list of all windows
servers() - return list of all servers
reconnects() - return list of all server reconnections
channels() - return list of all channels
queries() - return list of all queries
commands() - return list of all commands
logs() - return list of all log files
ignores() - returns list of all ignores

Server::channels() - return list of channels in server
Server::queries() - return list of queries in server

print(str[, level])
Server::print(channel, str[, level])
Window::print(str[, level])
Windowitem::print(str[, level])
  Print `str'. Default level is MSGLEVEL_CLIENTNOTICE.

command(cmd)
Server::command(cmd)
Window::command(cmd)
Windowitem::command(cmd)
  Send a command `cmd' (in current channel). The '/' char isn't needed.

version() - return client release date and time (format YYYYMMDD.hhmm)

parse_special(cmd, data="", flags=0)
Server::parse_special(cmd, data="", flags=0)
Windowitem::parse_special(cmd, data="", flags=0)
  evaluate a string with special vars

 *** Themes

You can have user configurable texts in scripts that work just like
irssi's internal texts that can be changed in themes.

First you'll have to register the formats:

Irssi::theme_register([
  'format_name', '{hilight my perl format!}',
  'format2', 'testing.. nick = $0, channel = $1'
]);

Printing happens with one of the functions:

printformat(level, format, ...)
Window::printformat(level, format, ...)
Server::printformat(target, level, format, ...)
Windowitem::printformat(level, format, ...)

For example:

  $channel->printformat(MSGLEVEL_CRAP, 'format2',
		        'nick', $channel->{name});


 *** Settings

settings_get_str(key)
settings_get_int(key)
settings_get_bool(key)
settings_get_time(key)
settings_get_level(key)
settings_get_size(key)
  Return value for setting.

settings_set_str(key, value)
settings_set_int(key, value)
settings_set_bool(key, value)
settings_set_time(key, value)
settings_set_level(key, value)
settings_set_size(key, value)
  Set value for setting.
  If you change the settings of another module/script with one of these, you
  must emit a "setup changed" signal afterwards.

settings_add_str(section, key, def)
settings_add_int(section, key, def)
settings_add_bool(section, key, def)
settings_add_time(section, key, def)
settings_add_level(section, key, def)
settings_add_size(section, key, def)
  Create new setting.

settings_remove(key)
  Remove a setting.


 *** Signals

signal_emit(signal, ...)
  Send signal `signal'. You can give 6 parameters at maximum.

signal_continue(...)
  Continue currently emitted signal with different parameters.

signal_add(signal, func)
  Bind `signal' to function `func'.

signal_add_first(signal, func)
  Bind `signal' to function `func'. Call `func' as soon as possible.

signal_add_last(signal, func)
  Bind `signal' to function `func'. Call `func' as late as possible.

signal_remove(signal, func)
  Unbind `signal' from function `func'.

signal_stop()
  Stop the signal that's currently being emitted.

signal_stop_by_name(signal)
  Stop the signal with name `signal' that's currently being emitted.

signal_register(hash)
  Register parameter types for one or more signals.
  `hash' must map one or more signal names to references to arrays
  containing 0 to 6 type names. Some recognized type names include
  int for integers, intptr for references to integers and string for
  strings. For all standard signals see src/perl/perl-signals-list.h
  in the source code (this is generated by src/perl/get-signals.pl).

  Any signals that were already registered are unaffected.

  Registration is required to get any parameters to signals written in
  Perl and to emit and continue signals from Perl.

  *** timeouts / IO listener / pidwait

timeout_add(msecs, func, data)
  Call `func' every `msecs' milliseconds (1000 = 1 second) with
  parameter `data'. Returns tag which can be used to stop the timeout.

timeout_add_once(msecs, func, data);
  Call `func' once after `msecs' milliseconds (1000 = 1 second)
  with parameter `data'. Returns tag which can be used to stop the timeout.

timeout_remove(tag)
  Remove timeout with tag.

input_add(source, condition, func, data)
  Call `func' with parameter `data' when specified IO happens.
  `source' is the file handle that is being listened. `condition' can
  be INPUT_READ, INPUT_WRITE or both. Returns tag which can be used to
  remove the listener.

input_remove(tag)
  Remove listener with tag.

pidwait_add(pid)
  Adds `pid' to the list of processes to wait for. The pid must identify
  a child process of the irssi process. When the process terminates, a
  "pidwait" signal will be sent with the pid and the status from
  waitpid(). This is useful to avoid zombies if your script forks.

pidwait_remove(pid)
  Removes `pid' from the list of processes to wait for. Terminated
  processes are removed automatically, so it is usually not necessary
  to call this function.

 *** Message levels

level2bits(level)
  Level string -> number

bits2level(bits)
  Level number -> string

combine_level(level, str)
  Combine level number to level string ("+level -level").
  Return new level number.


 *** Commands

Command->{}
  cmd - Command name
  category - Category

command_bind(cmd, func[, category])
  Bind command `cmd' to call function `func'. `category' is the
  category where the command is displayed in /HELP.

command_runsub(cmd, data, server, item)
  Run subcommands for `cmd'. First word in `data' is parsed as
  subcommand. `server' is Irssi::Server rec for current
  Irssi::Windowitem `item'.
  
  Call command_runsub in handler function for `cmd' and bind
  with command_bind("`cmd' `subcmd'", subcmdfunc[, category]);

command_unbind(cmd, func)
  Unbind command `cmd' from function `func'.

command_set_options(cmd, data)
  Set options for command `cmd' to `data'. `data' is a string of
  space separated words which specify the options. Each word can be
  optionally prefixed with one of the following character:

  '-': optional argument
  '+': argument required
  '@': optional numeric argument

command_parse_options(cmd, data)
  Parse options for command `cmd' in `data'. It returns a reference to
  an hash table with the options and a string with the remaining part
  of `data'. On error it returns the undefined value.


 *** Windows

UI::Window->{}
  refnum - Reference number
  name - Name

  width - Width
  height - Height

  history_name - Name of named historylist for this window

  active - Active window item
  active_server - Active server

  servertag - active_server must be either undef or have this same tag
              (unless there's items in this window). This is used by
	      /WINDOW SERVER -sticky
  level - Current window level

  sticky_refnum - 1 if reference number is sticky

  data_level - Current data level
  hilight_color - Current activity hilight color

  last_timestamp - Last time timestamp was written in window
  last_line - Last time text was written in window

  theme_name - Active theme in window, undef = default

UI::TextDest->{}
  window - Window where the text will be written
  server - Target server
  target - Target channel/query/etc name
  level - Text level

  hilight_priority - Priority for the hilighted text
  hilight_color - Color for the hilighted text


Window::items()
  Return a list of items in window.

Window
window_create(automatic)
Windowitem::window_create(automatic)
  Create a new window.

Window::destroy()
  Destroy the window.

Irssi::Window
Windowitem::window()
  Returns parent window for window item.

Window
window_find_name(name)
  Find window with name.

Window
window_find_refnum(refnum)
  Find window with reference number.

Window
window_find_level(level)
Server::window_find_level(level)
  Find window with level.

Window
window_find_closest(name, level)
Server::window_find_closest(name, level)
  Find window that matches best to given arguments. `name' can be either
  window name or name of one of the window items.

Window
window_find_item(name)
Server::window_find_item(name)
  Find window which contains window item with specified name/server.

Windowitem
window_item_find(name)
Server::window_item_find(name)
Window::item_find(server, name)
  Find window item that matches best to given arguments.

window_refnum_prev(refnum, wrap)
window_refnum_next(refnum, wrap)
  Return refnum for window that's previous/next in windows list.

windows_refnum_last()
  Return refnum for last window.

Window::item_add(item, automatic)
Window::item_remove(item)
Window::item_destroy(item)
  Add/remove/destroy window item

Window::set_active()
  Set window active.

Window::change_server(server)
Window::set_refnum(refnum)
Window::set_name(name)
Window::set_history(name)
Window::set_level(level)
  Change server/refnum/name/history/level in window.

Windowitem::set_active()
  Change window item active in parent window.

Window::item_prev()
Window::item_next()
  Change to previous/next window item.

Windowitem::change_server(server)
  Change server in window item.

Windowitem::is_active()
  Returns 1 if window item is the active item in parent window.

Window::get_active_name()
  Return active item's name, or if none is active, window's name


 *** Server Connects

Connect->{}
  type - "SERVER CONNECT" text
  chat_type - String ID of chat protocol, for example "IRC"

  address - Address where we connected (irc.blah.org)
  port - Port where we connected
  chatnet - Chat network

  password - Password we used in connection.
  wanted_nick - Nick which we would prefer to use
  username - User name
  realname - Real name

Connect
server_create_conn(address[, port=6667[, password=''[, nick=''[, channels='']]]])
  Create new server connection.


 *** Server functions

Server->{}
  type - "SERVER" text
  chat_type - String ID of chat protocol, for example "IRC"

  (..contains all the same data as Connect above..)

  connect_time - Time when connect() to server finished
  real_connect_time - Time when server sent "connected" message

  tag - Unique server tag
  nick - Current nick

  connected - Is connection finished? 1|0
  connection_lost - Did we lose the connection (1) or was
                    the connection just /DISCONNECTed (0)

  rawlog - Rawlog object for the server

  version - Server version
  last_invite - Last channel we were invited to
  server_operator - Are we server operator (IRC op) 1|0
  usermode_away - Are we marked as away? 1|0
  away_reason - Away reason message
  banned - Were we banned from this server? 1|0
  lag - Current lag to server in milliseconds

Server
Connect::connect()
  Connect to server.

Server::disconnect()
  Disconnect from server.

Server
server_find_tag(tag)
  Find server with tag

Server
server_find_chatnet(chatnet)
  Find first server that is in `chatnet'

Server::isnickflag(flag)
  Returns 1 if flag is a nick mode flag (@, + or % in IRC)

Server::ischannel(data)
  Returns 1 if start of `data' seems to mean channel.

Server::get_nick_flags()
  Returns nick flag characters in order: op, voice, halfop ("@+%" in IRC).

Server::send_message(target, msg, target_type)
  Sends a message to nick/channel. target_type 0 = channel, 1 = nick


 *** Server reconnections

Reconnect->{}
  type - "RECONNECT" text
  chat_type - String ID of chat protocol, for example "IRC"

  (..contains all the same data as Connect above..)

  tag - Unique numeric tag
  next_connect - Unix time stamp when the next connection occurs


 *** Chat networks

Chatnet->{}
  type - "CHATNET" text
  chat_type - String ID of chat protocol, for example "IRC"

  name - name of chat network

  nick - if not empty, nick preferred in this network
  username - if not empty, username preferred in this network
  realname - if not empty, realname preferred in this network

  own_host - address to use when connecting this network
  autosendcmd - command to send after connecting to this network

chatnet_find(name)
  Find chat network with name.


 *** Server redirections

This is a powerful feature of Irssi that I haven't seen in other IRC
clients. You can EASILY grab the server's reply for a command you send
to server without any horrible kludges.

redirect_register(command, remote, timeout, start, stop, opt)
   Register new redirection command. By default irssi has already
   registered at least: whois, whowas, who, list, ison, userhost, ping,
   "mode channel" (/MODE #channel), "mode b" (/MODE #channel b), "mode e"
   and "mode I".

   `command' specifies the name of the command to register, it doesn't
   have to be a real command name, but something you just specify to
   redirect_event() when using this redirection.

   `remote' specifies if the command is by default a remote command
   (eg. sent to another server). redirect_event() may override this.

   `timeout' - If remote is TRUE, specifies how many seconds to wait for
   reply before aborting.

   `start', `stop', `opt' - hash references with "event" => argpos entries.
   List of events that start and stop this redirection.
   Start event list may be empty, but there must be at least one
   stop event. Optional events are checked only if they are received
   immediately after one of the stop-events. `argpos' specifies the
   word number in event string which is compared to wanted argument,
   -1 = don't compare, TRUE always.

  Example (already done by irssi):

  Irssi::redirect_register('mode channel', 0, 0,
  	undef, # no start events
	{ # stop events
	  "event 324" => 1, # MODE-reply
	  "event 403" => 1, # no such channel
	  "event 442" => 1, # "you're not on that channel"
	  "event 479" => 1  # "Cannot join channel (illegal name)"
	}, { # optional events
	  "event 329", 1 # Channel create time
	} );

Server::redirect_event(command, count, arg, remote, failure_signal, signals)
   Specify that the next command sent to server will be redirected.
   NOTE: This command MUST be called before sending the command to server.

   `command' - Name of the registered redirection that we're using.

   `count' - How many times to execute the redirection. Some commands may
   send multiple stop events, like MODE #a,#b.

   `arg' - The argument to be compared in event strings. You can give multiple
   arguments separated with space.

   `remote' - Specifies if the command is a remote command, -1 = use default.

   `failure_signal' - If irssi can't find the stop signal for the redirection,
   this signal is called.

   `signals' - hash reference with "event" => "redir signal" entries.
   If the event is "", all the events belonging to the redirection but not
   specified here, will be sent there.

  Example:

  # ignore all events generated by whois query, except 311.
  $server->redirect_event("whois", 1, "cras", 0, undef, {
			  "event 311" => "redir whois",
			  "" => "event empty" });
  $server->send_raw("WHOIS :cras");


 *** Window items

Windowitem->{}
  type - Type of the window item, for example "CHANNEL" or "QUERY"
  chat_type - String ID of chat protocol, for example "IRC"

  server - Active server for item
  name - Name of the item

  createtime - Time the window item was created
  data_level - 0=no new data, 1=text, 2=msg, 3=highlighted text
  hilight_color - Color of the last highlighted text


 *** Channels

Channel->{}
  type - "CHANNEL" text
  chat_type - String ID of chat protocol, for example "IRC"

  (..contains all the same data as Windowitem above..)

  topic - Channel topic
  topic_by - Nick who set the topic
  topic_time - Timestamp when the topic was set

  no_modes - Channel is modeless
  mode - Channel mode
  limit - Max. users in channel (+l mode)
  key - Channel key (password)

  chanop - You are channel operator
  names_got - /NAMES list has been received
  wholist - /WHO list has been received
  synced - Channel is fully synchronized

  joined - JOIN event for this channel has been received
  left - You just left the channel (for "channel destroyed" event)
  kicked - You was just kicked out of the channel (for
           "channel destroyed" event)

Server::channels_join(channels, automatic)
  Join to channels in server. `channels' may also contain keys for
  channels just like with /JOIN command. `automatic' specifies if this
  channel was joined "automatically" or if it was joined because join
  was requested by user. If channel join is "automatic", irssi doesn't
  jump to the window where the channel was joined.


Channel::destroy()
  Destroy channel.

Channel
channel_find(channel)
  Find channel from any server.

Channel
Server::channel_find(channel)
  Find channel from specified server.


 *** Nick list

Nick->{}
  type - "NICK" text
  chat_type - String ID of chat protocol, for example "IRC"

  nick - Plain nick
  host - Host address
  realname - Real name
  hops - Hop count to the server the nick is using

  gone, serverop - User status, 1 or 0
  op, voice, halfop - Channel status, 1 or 0

  last_check - timestamp when last checked gone/ircop status.
  send_massjoin - Waiting to be sent in a "massjoin" signal, 1 or 0

Nick
Channel::nick_insert(nick, op, voice, send_massjoin)
  Add nick to nicklist.

Channel::nick_remove(nick)
  Remove nick from nicklist.

Nick
Channel::nick_find(nick)
  Find nick from nicklist.

Nick
Channel::nick_find_mask(mask)
  Find nick mask from nicklist, wildcards allowed.

Channel::nicks()
  Return a list of all nicks in channel.

Server::nicks_get_same(nick)
  Return all nick objects in all channels in server. List is in format:
  Channel, Nick, Channel, ...


 *** Queries

Query->{}
  type - "QUERY" text
  chat_type - String ID of chat protocol, for example "IRC"

  (..contains all the same data as Windowitem above..)

  address - Host address of the queries nick
  server_tag - Server tag used for this nick (doesn't get erased if
               server gets disconnected)
  unwanted - 1 if the other side closed or some error occurred (DCC chats)

Query
query_create(chat_type, server_tag, nick, automatic)
  Create a new query.

Query::destroy()
  Destroy the query.

Query::query_change_server(server)
  Change the active server of the query.

Query
query_find(nick)
  Find query from any server.

Query
Server::query_find(nick)
  Find query from specified server.


 *** Masks

You should use the Server version of the function if possible, since
with different chat protocols the mask matching could be different.

mask_match(mask, nick, user, host)
Server::mask_match(mask, nick, user, host)
  Return 1 if `mask' matches nick!user@host.

mask_match_address(mask, nick, address)
Server::mask_match_address(mask, nick, address)
  Return 1 if `mask' matches nick!address.

masks_match(masks, nick, address)
Server::masks_match(masks, nick, address)
  Return 1 if any mask in the `masks' (string separated with spaces)
  matches nick!address.


 *** Rawlog

Rawlog->{}
  logging - The rawlog is being written to file currently
  nlines - Number of lines in rawlog

Rawlog
rawlog_create()
  Create a new rawlog.

Rawlog::destroy()
  Destroy the rawlog.

Rawlog::get_lines()
  Returns all lines in rawlog.

rawlog_set_size(lines)
  Set the default rawlog size for new rawlogs.

Rawlog::open(filename)
  Start logging new messages in rawlog to specified file.

Rawlog::close()
  Stop logging to file.

Rawlog::save(filename)
  Save the current rawlog history to specified file.

Rawlog::input(str)
  Send `str' to raw log as input text.

Rawlog::output(str)
  Send `str' to raw log as output text.

Rawlog::redirect(str)
  Send `str' to raw log as redirection text.


 *** Logging

Log->{}
  fname - Log file name
  real_fname - The actual opened log file (after %d.%m.Y etc. are expanded)
  opened - Log file is open
  level - Log only these levels
  last - Timestamp when last message was written
  autoopen - Automatically open log at startup
  failed - Opening log failed last time
  temp - Log isn't saved to config file
  items - List of log items

Logitem->{}
  type - 0=target, 1=window refnum
  name - Name
  servertag - Server tag

Log
log_create_rec(fname, level)
  Create log file.

Log::update()
  Add log to list of logs / save changes to config file.

Log
log_find(fname)
  Find log with file name.

Log::close()
  Destroy log file.

Log::start_logging()
  Open log file and start logging.

Log::stop_logging()
  Close log file.

Log::item_add(type, name, server)
  Add log item to log.

Log::item_destroy(item)
  Remove log item from log.

Logitem
Log::item_find(type, item, server)
  Find item from log.


 *** Ignores

Ignore->{}
  mask - Ignore mask
  servertag - Ignore only in server
  channels - Ignore only in channels (list of names)
  pattern - Ignore text pattern

  level - Ignore level

  exception - This is an exception ignore
  regexp - Regexp pattern matching
  fullword - Pattern matches only full words

ignore_add_rec(ignore)
  Add ignore record.

ignore_update_rec(ignore)
  Update ignore record in configuration

ignore_check(nick, host, channel, text, level)
Server::ignore_check(nick, host, channel, text, level)
  Return 1 if ignoring matched.


 *** /EXEC processes

Process->{}
  id - ID for the process
  name - Name for the process (if given)
  args - The command that is being executed

  pid - PID for the executed command
  target - send text with /msg <target> ...
  target_win - print text to this window

  shell - start the program via /bin/sh
  notice - send text with /notice, not /msg if target is set
  silent - don't print "process exited with level xx"


 ***
 *** IRC specific functions. All objects below this are prefixed with Irc::
 ***

 *** IRC servers

Irc::Server->{}
  (..contains all the same data as core Server object..)
  real_address - Address the IRC server gives
  usermode - User mode in server
  userhost - Your user host in server

Irc::Connect->{}
  (..contains all the same data as core Connect object..)
  alternate_nick - Alternate nick to use if default nick is taken.

Connect::connect()
  Connect to IRC server.

Server::get_channels(server)
  Return a string of all channels (and keys, if any have them) in server,
  like "#a,#b,#c,#d x,b_chan_key,x,x" or just "#e,#f,#g"

Server::send_raw(cmd)
  Send raw message to server, it will be flood protected so you
  don't need to worry about it.

Server::send_raw_now(cmd)
  Send raw message to server immediately without flood protection.

Server::send_raw_split(cmd, nickarg, max_nicks)
  Split the `cmd' into several commands so `nickarg' argument has only
  `max_nicks' number of nicks.

  Example:
    $server->send_raw_split("KICK #channel nick1,nick2,nick3 :byebye", 3, 2);

  Irssi will send commands "KICK #channel nick1,nick2 :byebye" and
  "KICK #channel nick3 :byebye" to server.

Server::ctcp_send_reply(data)
  Send CTCP reply. This will be "CTCP flood protected" so if there's too
  many CTCP requests in buffer, this reply might not get sent. The data
  is the full raw command to be sent to server, like
    "NOTICE nick :\001VERSION irssi\001"

Server::isupport(name)
  Returns the value of the named item in the ISUPPORT (005) numeric to the
  script. If the item is not present returns undef, if the item has no value
  then "" is returned use defined $server->isupport("name") if you need to
  check whether a property is present.
  See http://tools.ietf.org/id/draft-brocklesby-irc-isupport-03.txt
  for more information on the ISUPPORT numeric.

 *** IRC channels

Ban->{}
  ban - The ban
  setby - Nick of who set the ban
  time - Timestamp when ban was set

Channel::bans()
  Return a list of bans in channel.

Channel::ban_get_mask(nick)
  Get ban mask for `nick'.

Channel::banlist_add(ban, nick, time)
   Add a new ban to channel.

Channel::banlist_remove(ban)
   Remove a ban from channel.


 *** DCC

Dcc->{}
  type - Type of the DCC: chat, send, get
  orig_type - Original DCC type that was sent to us - same as type except
              GET and SEND are swapped
  created - Time stamp when the DCC record was created

  server - Server record where the DCC was initiated.
  servertag - Tag of the server where the DCC was initiated.
  mynick - Our nick to use in DCC chat.
  nick - Other side's nick name.

  chat - Dcc chat record if the request came through DCC chat
  target - Who the request was sent to - your nick, channel or empty
           if you sent the request
  arg - Given argument .. file name usually

  addr - Other side's IP address.
  port - Port we're connecting in.

  starttime - Unix time stamp when the DCC transfer was started
  transfd - Bytes transferred

Dcc::Chat->{}
  id - Unique identifier - usually same as nick
  mirc_ctcp - Send CTCPs without the CTCP_MESSAGE prefix
  connection_lost - Other side closed connection

Dcc::Get->{}
  (..contains all the same data as core Dcc object..)
  size - File size
  skipped - Bytes skipped from start (resuming file)

  get_type - What to do if file exists? 0=default, 1=rename, 2=overwrite,
             3=resume
  file - The real file name which we use.
  file_quoted - 1 if file name was received quoted ("file name")

Dcc::Send->{}
  (..contains all the same data as core Dcc object..)
  size - File size
  skipped - Bytes skipped from start (resuming file)

  file_quoted - 1 if file name was received quoted ("file name")
  waitforend - File is sent, just wait for the replies from the other side
  gotalldata - Got all acks from the other end


dccs() - return list of all dcc connections

Dcc::destroy()
  Destroy DCC connection.

Dcc
dcc_find_item(type, nick, arg)
  Find DCC connection.

Dcc
dcc_find_by_port(nick, port)
  Find DCC connection by port.

Dcc
Windowitem::get_dcc(item)
  If `item' is a query of a =nick, return DCC chat record of nick.

Dcc::chat_send(data)
  Send `data' to dcc chat.

Server::dcc_ctcp_message(target, notice, msg)
Dcc::ctcp_message(target, notice, msg)
  Send a CTCP message/notify to target.


 *** Netsplits

Netsplit->{}
  nick - Nick
  address - Nick's host
  destroy - Timestamp when this record should be destroyed
  server - Netsplitserver object
  channels - list of channels (Netsplitchannel objects) the nick was in

Netsplitserver->{}
  server - The server nick was in
  destserver - The other server where split occurred.
  count - Number of splits in server

Netsplitchannel->{}
  name - Channel name
  nick - Nick object

Netsplit
Server::netsplit_find(nick, address)
  Check if nick!address is on the other side of netsplit. Netsplit records
  are automatically removed after 30 minutes (current default)..

Nick
Server::netsplit_find_channel(nick, address, channel)
  Find nick record for nick!address in channel `channel'.


 *** Notify list

Notifylist->{}
  mask - Notify nick mask
  away_check - Notify away status changes
  idle_check_time - Notify when idle time is reset and idle was bigger
                    than this (seconds)
  ircnets - List of ircnets (strings) the notify is checked

notifies() - Return list of all notifies

Notifylist
notifylist_add(mask, ircnets, away_check, idle_check_time)
  Add new item to notify list.

notifylist_remove(mask)
  Remove item from notify list.

Notifylist
notifylist_find(mask, ircnet)
  Find notify.

Server
notifylist_ison(nick, serverlist)
  Check if `nick' is in IRC. `serverlist' is a space separated
  list of server tags. If it's empty string, all servers will be checked.

Server::notifylist_ison_server(nick)
  Check if `nick' is on IRC server.

Notifylist::ircnets_match(ircnet)
  Returns 1 if notify is checked in `ircnet'.

 *** Proxy clients

Client->{}
  nick - nick of the client
  host - host of the client
  proxy_address - address of the proxy server
  server - Irc::Server for which we proxy to this client
  pass_sent - whether the client already send a PASS command
  user_sent - whether the client already send a USER command
  connected - whether the client is connected and ready
  want_ctcp - whether the client wants to receive CTCPs
  ircnet - network tag of the network we proxy




 Bugs and Limitations
 --------------------
* Calling die in 'script error' handler causes segfault (#101)
* Calling "script unload" from your own script causes segfault
* Storing and later using any Irssi object may result in use-after-free related crash
  - Workaround: always acquire fresh objects
* Calling $dcc->close from the "dcc created" signal will cause unstable behaviour and crashes (#386)
  - Workaround: use "dcc request" signal instead AND call
    &Irssi::signal_continue(@_); as the first thing