gnu-social/lib/util/commandinterpreter.php

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<?php
/*
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* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2008, 2009, StatusNet, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }
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require_once INSTALLDIR . '/lib/util/command.php';
class CommandInterpreter
{
function handle_command($user, $text)
{
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// XXX: localise
$text = preg_replace('/\s+/', ' ', trim($text));
list($cmd, $arg) = self::split_arg($text);
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// We try to support all the same commands as Twitter, see
// http://getsatisfaction.com/twitter/topics/what_are_the_twitter_commands
// There are a few compatibility commands from earlier versions of
// StatusNet
$cmd = strtolower($cmd);
$result = false;
if (Event::handle('StartInterpretCommand', array($cmd, $arg, $user, &$result))) {
switch($cmd) {
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case 'help':
if ($arg) {
$result = null;
} else {
$result = new HelpCommand($user);
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}
break;
case 'login':
if ($arg) {
$result = null;
} else {
$result = new LoginCommand($user);
}
break;
case 'lose':
if ($arg) {
list($other, $extra) = self::split_arg($arg);
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if ($extra) {
$result = null;
} else {
$result = new LoseCommand($user, $other);
}
} else {
$result = null;
}
break;
case 'subscribers':
if ($arg) {
$result = null;
} else {
$result = new SubscribersCommand($user);
}
break;
case 'subscriptions':
if ($arg) {
$result = null;
} else {
$result = new SubscriptionsCommand($user);
}
break;
case 'groups':
if ($arg) {
$result = null;
} else {
$result = new GroupsCommand($user);
}
break;
case 'on':
if ($arg) {
list($other, $extra) = self::split_arg($arg);
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if ($extra) {
$result = null;
} else {
$result = new OnCommand($user, $other);
}
} else {
$result = new OnCommand($user);
}
break;
case 'off':
if ($arg) {
list($other, $extra) = self::split_arg($arg);
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if ($extra) {
$result = null;
} else {
$result = new OffCommand($user, $other);
}
} else {
$result = new OffCommand($user);
}
break;
case 'stop':
case 'quit':
if ($arg) {
$result = null;
} else {
$result = new OffCommand($user);
}
break;
case 'join':
if (!$arg) {
$result = null;
} else {
list($other, $extra) = self::split_arg($arg);
if ($extra) {
$result = null;
} else {
$result = new JoinCommand($user, $other);
}
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}
break;
case 'drop':
if (!$arg) {
$result = null;
} else {
list($other, $extra) = self::split_arg($arg);
if ($extra) {
$result = null;
} else {
$result = new DropCommand($user, $other);
}
}
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break;
case 'follow':
case 'sub':
if (!$arg) {
$result = null;
} else {
list($other, $extra) = self::split_arg($arg);
if ($extra) {
$result = null;
} else {
$result = new SubCommand($user, $other);
}
}
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break;
case 'leave':
case 'unsub':
if (!$arg) {
$result = null;
} else {
list($other, $extra) = self::split_arg($arg);
if ($extra) {
$result = null;
} else {
$result = new UnsubCommand($user, $other);
}
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}
break;
case 'get':
case 'last':
if (!$arg) {
$result = null;
}
list($other, $extra) = self::split_arg($arg);
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if ($extra) {
$result = null;
} else {
$result = new GetCommand($user, $other);
}
break;
case 'r':
case 'reply':
if (!$arg) {
$result = null;
}
list($other, $extra) = self::split_arg($arg);
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if (!$extra) {
$result = null;
} else {
$result = new ReplyCommand($user, $other, $extra);
}
break;
case 'whois':
if (!$arg) {
$result = null;
} else {
list($other, $extra) = self::split_arg($arg);
if ($extra) {
$result = null;
} else {
$result = new WhoisCommand($user, $other);
}
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}
break;
case 'nudge':
if (!$arg) {
$result = null;
} else {
list($other, $extra) = self::split_arg($arg);
if ($extra) {
$result = null;
} else {
$result = new NudgeCommand($user, $other);
}
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}
break;
case 'stats':
if ($arg) {
$result = null;
} else {
$result = new StatsCommand($user);
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}
break;
case 'invite':
if (!$arg) {
$result = null;
} else {
list($other, $extra) = self::split_arg($arg);
if ($extra) {
$result = null;
} else {
$result = new InviteCommand($user, $other);
}
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}
break;
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case 'list':
case 'tag':
if (!$arg) {
$result = null;
break;
}
list($other, $tags) = self::split_arg($arg);
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if (!$tags) {
$result = null;
} else {
$result = new TagCommand($user, $other, $tags);
}
break;
case 'unlist':
case 'untag':
if (!$arg) {
$result = null;
break;
}
list($other, $tags) = self::split_arg($arg);
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if (!$tags) {
$result = null;
} else {
$result = new UntagCommand($user, $other, $tags);
}
break;
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case 'track':
if (!$arg) {
$result = null;
} else {
list($word, $extra) = self::split_arg($arg);
if ($extra) {
$result = null;
} else if ($word == 'off') {
$result = new TrackOffCommand($user);
} else {
$result = new TrackCommand($user, $word);
}
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}
break;
case 'untrack':
if (!$arg) {
$result = null;
} else {
list($word, $extra) = self::split_arg($arg);
if ($extra) {
$result = null;
} else if ($word == 'all') {
$result = new TrackOffCommand($user);
} else {
$result = new UntrackCommand($user, $word);
}
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}
break;
case 'tracks':
case 'tracking':
if ($arg) {
$result = null;
} else {
$result = new TrackingCommand($user);
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}
break;
}
Event::handle('EndInterpretCommand', array($cmd, $arg, $user, &$result));
}
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return $result;
}
/**
* Split arguments without triggering a PHP notice warning
*/
static function split_arg($text)
{
$pieces = explode(' ', $text, 2);
if (count($pieces) == 1) {
$pieces[] = null;
}
return $pieces;
}
}