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<?php
/**
* Elgg version library.
* Contains code for handling versioning and upgrades.
*
* @package Elgg
* @subpackage Core
* @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html GNU Public License version 2
* @copyright Curverider Ltd 2008
* @link http://elgg.org/
*/
/**
* Run any php upgrade scripts which are required
*
* @param unknown_type $version
*/
function upgrade_code($version)
{
global $CONFIG;
// Elgg and its database must be installed to upgrade it!
if (!is_db_installed() || !is_installed()) return false;
$version = (int) $version;
if ($handle = opendir($CONFIG->path . 'engine/lib/upgrades/')) {
$upgrades = array();
while ($updatefile = readdir($handle)) {
// Look for upgrades and add to upgrades list
if (!is_dir($CONFIG->path . 'engine/lib/upgrades/' . $updatefile)) {
if (preg_match('/([0-9]*)\.php/',$updatefile,$matches)) {
$core_version = (int) $matches[1];
if ($core_version > $version) {
$upgrades[] = $updatefile;
}
}
}
}
// Sort and execute
asort($upgrades);
if (sizeof($upgrades) > 0) {
foreach($upgrades as $upgrade) {
try {
@include($CONFIG->path . 'engine/lib/upgrades/' . $upgrade);
} catch (Exception $e) {
error_log($e->getmessage());
}
}
}
return true;
}
return false;
}
/**
* Get the current version information
*
* @param true|false $humanreadable Whether to return a human readable version (default: false)
* @return string|false Depending on success
*/
function get_version($humanreadable = false) {
global $CONFIG;
if (@include($CONFIG->path . "version.php")) {
if (!$humanreadable) return $version;
return $release;
}
return false;
}
/**
* Determines whether or not the database needs to be upgraded.
*
* @return true|false Depending on whether or not the db version matches the code version
*/
function version_upgrade_check() {
$dbversion = (int) datalist_get('version');
$version = get_version();
if ($version > $dbversion) {
return true;
}
return false;
}
/**
* Upgrades Elgg
*
*/
function version_upgrade() {
$dbversion = (int) datalist_get('version');
// Upgrade database
db_upgrade($dbversion);
system_message(elgg_echo('upgrade:db'));
// Upgrade core
if (upgrade_code($dbversion))
system_message(elgg_echo('upgrade:core'));
// Update the version
datalist_set('version', get_version());
}
/**
* Runs an upgrade check on boot.
*
*/
function version_boot() {
if (!is_installed()) return false;
if (version_upgrade_check()) {
version_upgrade();
}
}
// Register the boot handler for version
register_elgg_event_handler("boot","system","version_boot");
?>
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