mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-08-30 22:37:42 +02:00
153 lines
4.3 KiB
PHP
153 lines
4.3 KiB
PHP
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<?php
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/**
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* Virtual Page creates an instance of a page, with the same fields that the original page had, but readonly.
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* This allows you can have a page in mulitple places in the site structure, with different children without duplicating the content
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* Note: This Only duplicates $db fields and not the $has_one etc..
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*/
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class VirtualPage extends Page {
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static $add_action = "a 'virtual' page that uses another page's content";
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static $icon = array("cms/images/treeicons/page-shortcut-gold","file");
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public static $virtualFields;
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static $has_one = array(
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"CopyContentFrom" => "SiteTree",
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);
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static $db = array(
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"VersionID" => "Int",
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);
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/**
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* Generates the array of fields required for the page type.
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*/
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function getVirtualFields() {
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$nonVirtualFields = array(
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"SecurityTypeID",
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"OwnerID",
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"AssignedToID",
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"RequestedByID",
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"URLSegment",
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"Sort",
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"Status",
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'ShowInMenus',
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'ShowInSearch'
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);
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$allFields = $this->db();
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if($hasOne = $this->has_one()) foreach($hasOne as $link) $allFields[$link . 'ID'] = "Int";
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foreach($allFields as $field => $type) {
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if(!in_array($field, $nonVirtualFields)) $virtualFields[] = $field;
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}
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return $virtualFields;
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}
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function ContentSource() {
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return $this->CopyContentFrom();
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}
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/**
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* Generate the CMS fields from the fields from the original page.
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*/
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function getCMSFields($cms = null) {
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$fields = parent::getCMSFields($cms);
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// Setup the linking to the original page.
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$copyContentFromField = new TreeDropdownField("CopyContentFromID", "Choose a page to link to", "SiteTree");
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$copyContentFromField->setFilterFunction(create_function('$item', 'return $item->ClassName != "VirtualPage";'));
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// Setup virtual fields
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if($virtualFields = $this->getVirtualFields()) {
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$roTransformation = new ReadonlyTransformation();
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foreach($virtualFields as $virtualField) {
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if($fields->dataFieldByName($virtualField))
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$fields->replaceField($virtualField, $fields->dataFieldByName($virtualField)->transform($roTransformation));
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}
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}
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// Add fields to the tab
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$fields->addFieldToTab("Root.Content.Main", new HeaderField("This is a virtual page"), "Title");
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$fields->addFieldToTab("Root.Content.Main", $copyContentFromField, "Title");
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// Create links back to the original object in the CMS
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if($this->CopyContentFromID) {
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$linkToContent = "<a class=\"cmsEditlink\" href=\"admin/show/$this->CopyContentFromID\">click here to edit the content</a>";
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$fields->addFieldToTab("Root.Content.Main", new LabelField($linkToContent, null, true), "Title");
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}
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return $fields;
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}
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/**
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* We have to change it to copy all the content from the original page first.
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*/
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function onBeforeWrite() {
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// Don't do this stuff when we're publishing
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if(!$this->extension_instances['Versioned']->migratingVersion) {
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if(($this->changed['CopyContentFromID'] || !$this->Content) && $this->class == 'VirtualPage' ) {
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$source = $this->CopyContentFrom();
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$this->copyFrom($source);
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$this->URLSegment = $source->URLSegment . '-' . $this->ID;
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}
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}
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parent::onBeforeWrite();
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}
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/**
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* Ensure we have an up-to-date version of everything.
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*/
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function copyFrom($source) {
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if($source) {
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foreach($this->getVirtualFields() AS $virtualField)
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$this->$virtualField = $source->$virtualField;
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}
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}
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}
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/**
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* @desc
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*/
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class VirtualPage_Controller extends Page_Controller {
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/**
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* Reloads the content if the version is different ;-)
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*/
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function reloadContent() {
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$this->failover->copyFrom($this->failover->CopyContentFrom());
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$this->failover->write();
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return;
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}
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/**
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* When the virtualpage is loaded, check to see if the versions are the same
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* if not, reload the content.
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* NOTE: Virtual page must have a container object of subclass of sitetree.
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* We can't load the content without an ID or record to copy it from.
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*/
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function init(){
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if($this->record->ID){
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if($this->record->VersionID != $this->failover->CopyContentFrom()->Version){
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$this->reloadContent();
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$this->VersionID = $this->failover->CopyContentFrom()->VersionID;
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}
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}
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parent::init();
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}
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function loadcontentall() {
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$pages = DataObject::get("VirtualPage");
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foreach($pages as $page) {
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$page->copyFrom($page->CopyContentFrom());
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$page->write();
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$page->publish("Stage", "Live");
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echo "<li>Published $page->URLSegment";
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}
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}
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}
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?>
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