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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 {

    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
        common_show_header(_('Command results'));
        common_element('p', NULL, $text);
        common_show_footer();
    }
    
    function error($user, $text) {
        common_user_error($text);
    }
}


class AjaxWebChannel extends WebChannel {

    function output($user, $text) {
        common_start_html('text/xml;charset=utf-8', true);
        common_element_start('head');
        common_element('title', null, _('Command results'));
        common_element_end('head');
        common_element_start('body');
        common_element('p', array('id' => 'command_result'), $text);
        common_element_end('body');
        common_element_end('html');
    }

    function error($user, $text) {
        common_start_html('text/xml;charset=utf-8', true);
        common_element_start('head');
        common_element('title', null, _('Ajax Error'));
        common_element_end('head');
        common_element_start('body');
        common_element('p', array('id' => 'error'), $text);
        common_element_end('body');
        common_element_end('html');
    }
}


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;
    }
}