"SiteTree",
);
static $db = array(
"VersionID" => "Int",
);
/**
* Generates the array of fields required for the page type.
*/
function getVirtualFields() {
$nonVirtualFields = array(
"SecurityTypeID",
"OwnerID",
"AssignedToID",
"RequestedByID",
"URLSegment",
"Sort",
"Status",
'ShowInMenus',
'ShowInSearch'
);
$allFields = $this->db();
if($hasOne = $this->has_one()) foreach($hasOne as $link) $allFields[$link . 'ID'] = "Int";
foreach($allFields as $field => $type) {
if(!in_array($field, $nonVirtualFields)) $virtualFields[] = $field;
}
return $virtualFields;
}
function ContentSource() {
return $this->CopyContentFrom();
}
/**
* Generate the CMS fields from the fields from the original page.
*/
function getCMSFields($cms = null) {
$fields = parent::getCMSFields($cms);
// Setup the linking to the original page.
$copyContentFromField = new TreeDropdownField("CopyContentFromID", "Choose a page to link to", "SiteTree");
$copyContentFromField->setFilterFunction(create_function('$item', 'return $item->ClassName != "VirtualPage";'));
// Setup virtual fields
if($virtualFields = $this->getVirtualFields()) {
$roTransformation = new ReadonlyTransformation();
foreach($virtualFields as $virtualField) {
if($fields->dataFieldByName($virtualField))
$fields->replaceField($virtualField, $fields->dataFieldByName($virtualField)->transform($roTransformation));
}
}
// Add fields to the tab
$fields->addFieldToTab("Root.Content.Main", new HeaderField("This is a virtual page"), "Title");
$fields->addFieldToTab("Root.Content.Main", $copyContentFromField, "Title");
// Create links back to the original object in the CMS
if($this->CopyContentFromID) {
$linkToContent = "CopyContentFromID\">click here to edit the content";
$fields->addFieldToTab("Root.Content.Main", new LabelField($linkToContent, null, true), "Title");
}
return $fields;
}
/**
* We have to change it to copy all the content from the original page first.
*/
function onBeforeWrite() {
// Don't do this stuff when we're publishing
if(!$this->extension_instances['Versioned']->migratingVersion) {
if(($this->changed['CopyContentFromID'] || !$this->Content) && $this->class == 'VirtualPage' ) {
$source = $this->CopyContentFrom();
$this->copyFrom($source);
$this->URLSegment = $source->URLSegment . '-' . $this->ID;
}
}
parent::onBeforeWrite();
}
/**
* Ensure we have an up-to-date version of everything.
*/
function copyFrom($source) {
if($source) {
foreach($this->getVirtualFields() AS $virtualField)
$this->$virtualField = $source->$virtualField;
}
}
}
/**
* @desc
*/
class VirtualPage_Controller extends Page_Controller {
/**
* Reloads the content if the version is different ;-)
*/
function reloadContent() {
$this->failover->copyFrom($this->failover->CopyContentFrom());
$this->failover->write();
return;
}
/**
* When the virtualpage is loaded, check to see if the versions are the same
* if not, reload the content.
* NOTE: Virtual page must have a container object of subclass of sitetree.
* We can't load the content without an ID or record to copy it from.
*/
function init(){
if($this->record->ID){
if($this->record->VersionID != $this->failover->CopyContentFrom()->Version){
$this->reloadContent();
$this->VersionID = $this->failover->CopyContentFrom()->VersionID;
}
}
parent::init();
}
function loadcontentall() {
$pages = DataObject::get("VirtualPage");
foreach($pages as $page) {
$page->copyFrom($page->CopyContentFrom());
$page->write();
$page->publish("Stage", "Live");
echo "Published $page->URLSegment";
}
}
}
?>