/**
* @see \wcf\system\edit\IHistorySavingObjectTypeProvider::checkPermissions()
*/
public function checkPermissions(IHistorySavingObject $object)
{
if (!$object instanceof HistorySavingEntry) {
return false;
}
if (!$object->canEdit()) {
throw new PermissionDeniedException();
}
}
/**
* @see \wcf\page\IPage::readParameters()
*/
public function readParameters()
{
parent::readParameters();
if (isset($_REQUEST['oldID'])) {
$this->oldID = intval($_REQUEST['oldID']);
$this->old = new EditHistoryEntry($this->oldID);
if (!$this->old->entryID) {
throw new IllegalLinkException();
}
if (isset($_REQUEST['newID']) && $_REQUEST['newID'] !== 'current') {
$this->newID = intval($_REQUEST['newID']);
$this->new = new EditHistoryEntry($this->newID);
if (!$this->new->entryID) {
throw new IllegalLinkException();
}
}
// if new version isn't 'current' check whether they are comparable
if ($this->new) {
// different objectTypes cannot be compared
if ($this->old->objectTypeID != $this->new->objectTypeID) {
throw new IllegalLinkException();
}
// different items cannot be compared
if ($this->old->objectID != $this->new->objectID) {
throw new IllegalLinkException();
}
}
$this->objectID = $this->old->objectID;
$this->objectType = ObjectTypeCache::getInstance()->getObjectType($this->old->objectTypeID);
} else {
if (isset($_REQUEST['objectID']) && isset($_REQUEST['objectType'])) {
$this->objectID = intval($_REQUEST['objectID']);
$this->objectType = ObjectTypeCache::getInstance()->getObjectTypeByName('com.woltlab.wcf.edit.historySavingObject', $_REQUEST['objectType']);
} else {
throw new IllegalLinkException();
}
}
if (!$this->objectType) {
throw new IllegalLinkException();
}
$processor = $this->objectType->getProcessor();
$this->object = $processor->getObjectByID($this->objectID);
if (!$this->object->getObjectID()) {
throw new IllegalLinkException();
}
$processor->checkPermissions($this->object);
$this->activeMenuItem = $processor->getActivePageMenuItem();
$this->object->addBreadcrumbs();
if (isset($_REQUEST['newID']) && !$this->new) {
$this->new = $this->object;
$this->newID = 'current';
}
if (!empty($_POST)) {
HeaderUtil::redirect(LinkHandler::getInstance()->getLink('EditHistory', array('objectID' => $this->objectID, 'objectType' => $this->objectType->objectType, 'newID' => $this->newID, 'oldID' => $this->oldID)));
exit;
}
}