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diff --git a/lib/channel.php b/lib/channel.php
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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); }
+
+class Channel
+{
+ function on($user)
+ {
+ return false;
+ }
+
+ function off($user)
+ {
+ return false;
+ }
+
+ function output($user, $text)
+ {
+ return false;
+ }
+
+ function error($user, $text)
+ {
+ return false;
+ }
+
+ function source()
+ {
+ return null;
+ }
+}
+
+class XMPPChannel extends Channel
+{
+
+ var $conn = null;
+
+ function source()
+ {
+ return 'xmpp';
+ }
+
+ function __construct($conn)
+ {
+ $this->conn = $conn;
+ }
+
+ function on($user)
+ {
+ return $this->set_notify($user, 1);
+ }
+
+ function off($user)
+ {
+ return $this->set_notify($user, 0);
+ }
+
+ function output($user, $text)
+ {
+ $text = '['.common_config('site', 'name') . '] ' . $text;
+ jabber_send_message($user->jabber, $text);
+ }
+
+ function error($user, $text)
+ {
+ $text = '['.common_config('site', 'name') . '] ' . $text;
+ jabber_send_message($user->jabber, $text);
+ }
+
+ function set_notify(&$user, $notify)
+ {
+ $orig = clone($user);
+ $user->jabbernotify = $notify;
+ $result = $user->update($orig);
+ if (!$result) {
+ $last_error = &PEAR::getStaticProperty('DB_DataObject','lastError');
+ common_log(LOG_ERR,
+ 'Could not set notify flag to ' . $notify .
+ ' for user ' . common_log_objstring($user) .
+ ': ' . $last_error->message);
+ return false;
+ } else {
+ common_log(LOG_INFO,
+ 'User ' . $user->nickname . ' set notify flag to ' . $notify);
+ return true;
+ }
+ }
+}
+
+class WebChannel extends Channel
+{
+ var $out = null;
+
+ function __construct($out=null)
+ {
+ $this->out = $out;
+ }
+
+ function source()
+ {
+ return 'web';
+ }
+
+ function on($user)
+ {
+ return false;
+ }
+
+ function off($user)
+ {
+ return false;
+ }
+
+ function output($user, $text)
+ {
+ # XXX: buffer all output and send it at the end
+ # XXX: even better, redirect to appropriate page
+ # depending on what command was run
+ $this->out->startHTML();
+ $this->out->elementStart('head');
+ $this->out->element('title', null, _('Command results'));
+ $this->out->elementEnd('head');
+ $this->out->elementStart('body');
+ $this->out->element('p', array('id' => 'command_result'), $text);
+ $this->out->elementEnd('body');
+ $this->out->endHTML();
+ }
+
+ function error($user, $text)
+ {
+ common_user_error($text);
+ }
+}
+
+class AjaxWebChannel extends WebChannel
+{
+ function output($user, $text)
+ {
+ $this->out->startHTML('text/xml;charset=utf-8');
+ $this->out->elementStart('head');
+ $this->out->element('title', null, _('Command results'));
+ $this->out->elementEnd('head');
+ $this->out->elementStart('body');
+ $this->out->element('p', array('id' => 'command_result'), $text);
+ $this->out->elementEnd('body');
+ $this->out->endHTML();
+ }
+
+ function error($user, $text)
+ {
+ $this->out->startHTML('text/xml;charset=utf-8');
+ $this->out->elementStart('head');
+ $this->out->element('title', null, _('Ajax Error'));
+ $this->out->elementEnd('head');
+ $this->out->elementStart('body');
+ $this->out->element('p', array('id' => 'error'), $text);
+ $this->out->elementEnd('body');
+ $this->out->endHTML();
+ }
+}
+
+class MailChannel extends Channel
+{
+
+ var $addr = null;
+
+ function source()
+ {
+ return 'mail';
+ }
+
+ function __construct($addr=null)
+ {
+ $this->addr = $addr;
+ }
+
+ function on($user)
+ {
+ return $this->set_notify($user, 1);
+ }
+
+ function off($user)
+ {
+ return $this->set_notify($user, 0);
+ }
+
+ function output($user, $text)
+ {
+
+ $headers['From'] = $user->incomingemail;
+ $headers['To'] = $this->addr;
+
+ $headers['Subject'] = _('Command complete');
+
+ return mail_send(array($this->addr), $headers, $text);
+ }
+
+ function error($user, $text)
+ {
+
+ $headers['From'] = $user->incomingemail;
+ $headers['To'] = $this->addr;
+
+ $headers['Subject'] = _('Command failed');
+
+ return mail_send(array($this->addr), $headers, $text);
+ }
+
+ function set_notify($user, $value)
+ {
+ $orig = clone($user);
+ $user->smsnotify = $value;
+ $result = $user->update($orig);
+ if (!$result) {
+ common_log_db_error($user, 'UPDATE', __FILE__);
+ return false;
+ }
+ return true;
+ }
+}