function upgrade()
{
global $thisstaff, $ost;
if (!$thisstaff or !$thisstaff->isAdmin() or !$ost) {
Http::response(403, 'Access Denied');
}
$upgrader = new Upgrader($ost->getDBSignature(), TABLE_PREFIX, SQL_DIR);
//Just report the next action on the first call.
if (!$_SESSION['ost_upgrader'] || !$_SESSION['ost_upgrader'][$upgrader->getShash()]['progress']) {
$_SESSION['ost_upgrader'][$upgrader->getShash()]['progress'] = $upgrader->getNextAction();
Http::response(200, $upgrader->getNextAction());
exit;
}
if ($upgrader->isAborted()) {
Http::response(416, "We have a problem ... wait a sec.");
exit;
}
if ($upgrader->getNumPendingTasks() && $upgrader->doTasks()) {
//More pending tasks - doTasks returns the number of pending tasks
Http::response(200, $upgrader->getNextAction());
exit;
} elseif ($ost->isUpgradePending()) {
if ($upgrader->isUpgradable()) {
$version = $upgrader->getNextVersion();
if ($upgrader->upgrade()) {
//We're simply reporting progress here - call back will report next action'
Http::response(200, "Upgraded to {$version} ... post-upgrade checks!");
exit;
}
} else {
//Abort: Upgrade pending but NOT upgradable - invalid or wrong hash.
$upgrader->abort(sprintf('Upgrade Failed: Invalid or wrong hash [%s]', $ost->getDBSignature()));
}
} elseif (!$ost->isUpgradePending()) {
$upgrader->setState('done');
session_write_close();
Http::response(201, "We're done!");
exit;
}
if ($upgrader->isAborted() || $upgrader->getErrors()) {
Http::response(416, "We have a problem ... wait a sec.");
exit;
}
Http::response(200, $upgrader->getNextAction());
}
if (!$ost->isUpgradePending()) {
$errors['err'] = ' Nothing to do! System already upgraded to the current version';
} elseif (!$upgrader->isUpgradable()) {
$errors['err'] = 'The upgrader does NOT support upgrading from the current vesion!';
} elseif (!$upgrader->check_prereq()) {
$errors['prereq'] = 'Minimum requirements not met! Refer to Release Notes for more information';
} elseif (!strcasecmp(basename(CONFIG_FILE), 'settings.php')) {
$errors['err'] = 'Config file rename required to continue!';
} else {
$upgrader->setState('upgrade');
}
break;
case 'upgrade':
//Manual upgrade.... when JS (ajax) is not supported.
if ($upgrader->getNumPendingTasks()) {
$upgrader->doTasks();
} elseif ($ost->isUpgradePending() && $upgrader->isUpgradable()) {
$upgrader->upgrade();
} elseif (!$ost->isUpgradePending()) {
$upgrader->setState('done');
}
if ($errors = $upgrader->getErrors()) {
$upgrader->setState('aborted');
}
break;
default:
$errors['err'] = 'Unknown action!';
}
}
switch (strtolower($upgrader->getState())) {
case 'aborted':