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<?php
/**
* Elgg version library.
* Contains code for handling versioning and upgrades.
*
* @package Elgg.Core
* @subpackage Version
*/
/**
* Run any php upgrade scripts which are required
*
* @param int $version Version upgrading from.
* @param bool $quiet Suppress errors. Don't use this.
*
* @return bool
*/
function upgrade_code($version, $quiet = FALSE) {
global $CONFIG;
$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/' . $updatefile)) {
if (preg_match('/^([0-9]{10})\.(php)$/', $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 $upgrade) {
// hide all errors.
if ($quiet) {
// hide include errors as well as any exceptions that might happen
try {
if (!@include($CONFIG->path . 'engine/lib/upgrades/' . $upgrade)) {
error_log($e->getmessage());
}
} catch (Exception $e) {
error_log($e->getmessage());
}
} else {
include($CONFIG->path . 'engine/lib/upgrades/' . $upgrade);
}
}
}
return TRUE;
}
return FALSE;
}
/**
* Get the current version information
*
* @param bool $humanreadable Whether to return a human readable version (default: false)
*
* @return string|false Depending on success
*/
function get_version($humanreadable = false) {
global $CONFIG;
if (isset($CONFIG->path)) {
if (include($CONFIG->path . "version.php")) {
return (!$humanreadable) ? $version : $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 Database and code
*
* @return bool
*
*/
function version_upgrade() {
// It's possible large upgrades could exceed the max execution time.
set_time_limit(0);
$dbversion = (int) datalist_get('version');
// No version number? Oh snap...this is an upgrade from a clean installation < 1.7.
// Run all upgrades without error reporting and hope for the best.
// See http://trac.elgg.org/elgg/ticket/1432 for more.
$quiet = !$dbversion;
// Upgrade database
if (db_upgrade($dbversion, '', $quiet)) {
system_message(elgg_echo('upgrade:db'));
}
// Upgrade core
if (upgrade_code($dbversion, $quiet)) {
system_message(elgg_echo('upgrade:core'));
}
// Now we trigger an event to give the option for plugins to do something
$upgrade_details = new stdClass;
$upgrade_details->from = $dbversion;
$upgrade_details->to = get_version();
elgg_trigger_event('upgrade', 'upgrade', $upgrade_details);
// Update the version
datalist_set('version', get_version());
}
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