#! /usr/bin/php5
<?php
/**
 * Massmail backend cron script
 * This is mass mailing backend script which actually sends messages 
 * of the mailings scheduled via the web frontend.
 * Mailing types, for which this is applicable, have trailer
 * appended with individual URL for unsubscription from future
 * mailings.
 *
 * Copyright 1999-2001 (c) VA Linux Systems
 * Copyright 2003 (c) GForge, LLC
 *
 * This file is part of GForge.
 *
 * GForge is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * GForge 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GForge; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  US
 */

require dirname(__FILE__).'/../www/env.inc.php';
require $gfwww.'include/squal_pre.php';
require $gfcommon.'include/cron_utils.php';

$err='';

if (!cron_create_lock(__FILE__)) {
	$err = "Massmail already running...exiting";
		if (!cron_entry(6,$err)) {
			# rely on crond to report the error
			echo "cron_entry error: ".db_error()."\n";
		}
	exit();
}

// Pause between messages, sec
$SLEEP = 1;

// This tables maps mailing types to tables which required to perform it
$table_mapping = array(
	'ALL'		=> "users",
	'SITE'	=> "users",
	'COMMNTY' => "users",
	'DVLPR'   => "users,user_group",
	'ADMIN'   => "users,user_group,groups",
	'SFDVLPR' => "users,user_group",
);

// This tables maps mailing types to WHERE subclauses which select 
// appropriate users
$cond_mapping = array(
	'ALL'		=> "",
	'SITE'	=> "AND mail_siteupdates=1",
	'COMMNTY' => "AND mail_va=1",
	'DVLPR'   => "AND users.user_id=user_group.user_id",
	'ADMIN'   => "AND users.user_id=user_group.user_id AND user_group.admin_flags='A' AND groups.status='A' AND groups.group_id=user_group.group_id",
	'SFDVLPR' => "AND users.user_id=user_group.user_id AND user_group.group_id=1"
);

$mail_res = db_query_params ('SELECT *
	FROM massmail_queue
	WHERE finished_date=0
	ORDER BY queued_date',
			array()) ;


/* If there was error, notify admins, but don't be pesky */
if (!$mail_res) {
	$err .= "cannot execute query to select pending mailings: ".db_error()."\n";
	$hrs = time()/(60*60);
	// Send reminder every second day at 11am
	if (($hrs%24)==11 && (($hrs/24)%2)==1) {
		global $sys_admin_email;
		util_send_message(
			"$sys_admin_email",
			"ATT: Problems with massmail cron script",
			"This is automatically generated message from\n
the mass mailing cron script of ".forge_get_config ('forge_name')."\n
installation. There was error querying massmail_queue\n
database table. Please take appropriate actions.\n"
		);
	}
	m_exit();
}

// $err .= "Got ".db_numrows($mail_res)." rows\n";

if (db_numrows($mail_res)<1) {
	// Nothing to send
	m_exit();
}

$type = db_result($mail_res, 0, 'type');
if (!$table_mapping[$type]) {
	$err .= "Unknown mailing type\n";
	m_exit();
}

$subj = db_result($mail_res, 0, 'subject');
$mail_id = db_result($mail_res, 0, 'id');
$body =  db_result($mail_res, 0, 'message');
//$err .= "Got mail to send: ".$subj."\n";

$qpa = db_construct_qpa (false, 'SELECT DISTINCT users.user_id,users.user_name,users.realname,users.email,users.confirm_hash') ;
switch ($type) {
case 'ALL':
case 'SITE':
case 'COMMNTY':
	$qpa = db_construct_qpa ($qpa, ' FROM users') ;
	break ;
case 'DVLPR':
case 'SFDVLPR':
	$qpa = db_construct_qpa ($qpa, ' FROM users, user_group') ;
	break ;
case 'ADMIN':
	$qpa = db_construct_qpa ($qpa, ' FROM users, user_group, groups') ;
	break ;
}

$qpa = db_construct_qpa ($qpa, ' WHERE users.user_id > $1 AND users.status=$2',
			 array (db_result($mail_res, 0, 'last_userid'),
				'A')) ;

$cond_mapping = array(
	'ALL'		=> "",
	'SITE'	=> "",
	'COMMNTY' => "",
	'DVLPR'   => "",
	'ADMIN'   => "",
	'SFDVLPR' => ""
);


switch ($type) {
case 'ALL':
	break ;
case 'SITE':
	$qpa = db_construct_qpa ($qpa, ' AND mail_siteupdates=1') ;
	break ;
case 'COMMNTY':
	$qpa = db_construct_qpa ($qpa, ' AND mail_va=1') ;
	break ;
case 'DVLPR':
	$qpa = db_construct_qpa ($qpa, ' AND users.user_id=user_group.user_id') ;
	break ;
case 'SFDVLPR':
	$qpa = db_construct_qpa ($qpa, ' AND users.user_id=user_group.user_id AND user_group.group_id=1') ;
	break ;
case 'ADMIN':
	$qpa = db_construct_qpa ($qpa, ' AND users.user_id=user_group.user_id AND user_group.admin_flags=$1 AND groups.status=$2 AND groups.group_id=user_group.group_id',
				 array ('A', 'A')) ;
	break ;
}

$qpa = db_construct_qpa ($qpa, ' ORDER BY users.user_id') ;

// Get next chunk of users to mail
$users_res = db_query_qpa ($qpa);

$err .= "Mailing ".db_numrows($users_res)." users.\n";

// If no more users left, we've finished with this mailing
if ($users_res && db_numrows($users_res)==0) {
	db_query_params ('UPDATE massmail_queue SET failed_date=0,finished_date=$1 WHERE id=$2',
			 array(time(),
			       $mail_id));
	m_exit();
}

// Actual mailing loop
$compt = 0;
while ($row =& db_fetch_array($users_res)) {
	$compt++;
	if ($type=='SITE' || $type=='COMMNTY') {
		$tail = "\r\n==================================================================\r\n" ;
		$tail .= sprintf (_('You receive this message because you subscribed to %1$s
site mailing(s). You may opt out from some of them selectively
by logging in to %1$s and visiting your Account Maintenance
page (%2$s), or disable them altogether
by visiting following link:
<%3$s>
'), 
				  forge_get_config ('forge_name'), 
				  util_make_url('/account/'),
				  util_make_url('/account/unsubscribe.php?ch=_'.$row['confirm_hash'])) ;
	} else {
		$tail = "" ;
	}
	util_send_message($row['email'],$subj, $body."\r\n".$tail,'noreply@'.$sys_default_domain);
	$last_userid = $row['user_id'];

	sleep($SLEEP);
}

db_query_params ('UPDATE massmail_queue SET failed_date=0, last_userid=$1, finished_date=$2 WHERE id=$3',
		 array($last_userid,
		       time (),
		       $mail_id));

if (db_error()) {
	$err .= $sql.db_error();
}
$mess = "massmail $compt mails sent";
m_exit($mess);

function m_exit($mess = '') {
	global $err;
	
	if (!cron_remove_lock(__FILE__)) {
		$err .= "Could not remove lock\n";
	}
	if (!cron_entry(6,$mess.$err)) {
		# rely on crond to report the error
		echo "cron_entry error: ".db_error()."\n";
	}
	exit;
}

// Local Variables:
// mode: php
// c-file-style: "bsd"
// End:

?>