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+<?php
+/*
+ * Laconica - a distributed open-source microblogging tool
+ * Copyright (C) 2008, Controlez-Vous, 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('LACONICA')) { exit(1); }
+
+require_once INSTALLDIR.'/lib/command.php';
+
+class CommandInterpreter
+{
+ function handle_command($user, $text)
+ {
+ # XXX: localise
+
+ $text = preg_replace('/\s+/', ' ', trim($text));
+ list($cmd, $arg) = explode(' ', $text, 2);
+
+ # We try to support all the same commands as Twitter, see
+ # http://getsatisfaction.com/twitter/topics/what_are_the_twitter_commands
+ # There are a few compatibility commands from earlier versions of
+ # Laconica
+
+ switch(strtolower($cmd)) {
+ case 'help':
+ if ($arg) {
+ return null;
+ }
+ return new HelpCommand($user);
+ case 'on':
+ if ($arg) {
+ list($other, $extra) = explode(' ', $arg, 2);
+ if ($extra) {
+ return null;
+ } else {
+ return new OnCommand($user, $other);
+ }
+ } else {
+ return new OnCommand($user);
+ }
+ case 'off':
+ if ($arg) {
+ list($other, $extra) = explode(' ', $arg, 2);
+ if ($extra) {
+ return null;
+ } else {
+ return new OffCommand($user, $other);
+ }
+ } else {
+ return new OffCommand($user);
+ }
+ case 'stop':
+ case 'quit':
+ if ($arg) {
+ return null;
+ } else {
+ return new OffCommand($user);
+ }
+ case 'follow':
+ case 'sub':
+ if (!$arg) {
+ return null;
+ }
+ list($other, $extra) = explode(' ', $arg, 2);
+ if ($extra) {
+ return null;
+ } else {
+ return new SubCommand($user, $other);
+ }
+ case 'leave':
+ case 'unsub':
+ if (!$arg) {
+ return null;
+ }
+ list($other, $extra) = explode(' ', $arg, 2);
+ if ($extra) {
+ return null;
+ } else {
+ return new UnsubCommand($user, $other);
+ }
+ case 'get':
+ case 'last':
+ if (!$arg) {
+ return null;
+ }
+ list($other, $extra) = explode(' ', $arg, 2);
+ if ($extra) {
+ return null;
+ } else {
+ return new GetCommand($user, $other);
+ }
+ case 'd':
+ case 'dm':
+ if (!$arg) {
+ return null;
+ }
+ list($other, $extra) = explode(' ', $arg, 2);
+ if (!$extra) {
+ return null;
+ } else {
+ return new MessageCommand($user, $other, $extra);
+ }
+ case 'whois':
+ if (!$arg) {
+ return null;
+ }
+ list($other, $extra) = explode(' ', $arg, 2);
+ if ($extra) {
+ return null;
+ } else {
+ return new WhoisCommand($user, $other);
+ }
+ case 'fav':
+ if (!$arg) {
+ return null;
+ }
+ list($other, $extra) = explode(' ', $arg, 2);
+ if ($extra) {
+ return null;
+ } else {
+ return new FavCommand($user, $other);
+ }
+ case 'nudge':
+ if (!$arg) {
+ return null;
+ }
+ list($other, $extra) = explode(' ', $arg, 2);
+ if ($extra) {
+ return null;
+ } else {
+ return new NudgeCommand($user, $other);
+ }
+ case 'stats':
+ if ($arg) {
+ return null;
+ }
+ return new StatsCommand($user);
+ case 'invite':
+ if (!$arg) {
+ return null;
+ }
+ list($other, $extra) = explode(' ', $arg, 2);
+ if ($extra) {
+ return null;
+ } else {
+ return new InviteCommand($user, $other);
+ }
+ case 'track':
+ if (!$arg) {
+ return null;
+ }
+ list($word, $extra) = explode(' ', $arg, 2);
+ if ($extra) {
+ return null;
+ } else if ($word == 'off') {
+ return new TrackOffCommand($user);
+ } else {
+ return new TrackCommand($user, $word);
+ }
+ case 'untrack':
+ if (!$arg) {
+ return null;
+ }
+ list($word, $extra) = explode(' ', $arg, 2);
+ if ($extra) {
+ return null;
+ } else if ($word == 'all') {
+ return new TrackOffCommand($user);
+ } else {
+ return new UntrackCommand($user, $word);
+ }
+ case 'tracks':
+ case 'tracking':
+ if ($arg) {
+ return null;
+ }
+ return new TrackingCommand($user);
+ default:
+ return false;
+ }
+ }
+}
+