mirror of
https://github.com/silverstripe/silverstripe-cms
synced 2024-10-22 08:05:56 +02:00
516 lines
14 KiB
PHP
516 lines
14 KiB
PHP
<?php
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use SilverStripe\ORM\DataObject;
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use SilverStripe\ORM\Versioning\Versioned;
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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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* @method SiteTree CopyContentFrom()
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*
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* @package cms
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*/
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class VirtualPage extends Page {
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private static $description = 'Displays the content of another page';
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public static $virtualFields;
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/**
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* @var array Define fields that are not virtual - the virtual page must define these fields themselves.
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* Note that anything in {@link self::config()->initially_copied_fields} is implicitly included in this list.
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*/
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private static $non_virtual_fields = array(
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"ID",
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"ClassName",
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"ObsoleteClassName",
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"SecurityTypeID",
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"OwnerID",
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"ParentID",
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"URLSegment",
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"Sort",
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"Status",
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'ShowInMenus',
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// 'Locale'
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'ShowInSearch',
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'Version',
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"Embargo",
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"Expiry",
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"CanViewType",
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"CanEditType",
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"CopyContentFromID",
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"HasBrokenLink",
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);
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/**
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* @var array Define fields that are initially copied to virtual pages but left modifiable after that.
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*/
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private static $initially_copied_fields = array(
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'ShowInMenus',
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'ShowInSearch',
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'URLSegment',
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);
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private static $has_one = array(
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"CopyContentFrom" => "SiteTree",
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);
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private static $owns = array(
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"CopyContentFrom",
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);
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private static $db = array(
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"VersionID" => "Int",
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);
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/**
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* Generates the array of fields required for the page type.
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*
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* @return array
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*/
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public function getVirtualFields() {
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// Check if copied page exists
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$record = $this->CopyContentFrom();
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if(!$record || !$record->exists()) {
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return array();
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}
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// Diff db with non-virtual fields
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$fields = array_keys($record->db());
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$nonVirtualFields = $this->getNonVirtualisedFields();
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return array_diff($fields, $nonVirtualFields);
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}
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/**
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* List of fields or properties to never virtualise
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*
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* @return array
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*/
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public function getNonVirtualisedFields() {
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return array_merge($this->config()->non_virtual_fields, $this->config()->initially_copied_fields);
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}
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public function setCopyContentFromID($val) {
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// Sanity check to prevent pages virtualising other virtual pages
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if($val && DataObject::get_by_id('SiteTree', $val) instanceof VirtualPage) {
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$val = 0;
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}
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return $this->setField("CopyContentFromID", $val);
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}
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public function ContentSource() {
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$copied = $this->CopyContentFrom();
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if($copied && $copied->exists()) {
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return $copied;
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}
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return $this;
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}
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/**
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* For VirtualPage, add a canonical link tag linking to the original page
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* See TRAC #6828 & http://support.google.com/webmasters/bin/answer.py?hl=en&answer=139394
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*
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* @param boolean $includeTitle Show default <title>-tag, set to false for custom templating
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* @return string The XHTML metatags
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*/
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public function MetaTags($includeTitle = true) {
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$tags = parent::MetaTags($includeTitle);
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$copied = $this->CopyContentFrom();
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if ($copied && $copied->exists()) {
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$link = Convert::raw2att($copied->Link());
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$tags .= "<link rel=\"canonical\" href=\"{$link}\" />\n";
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}
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return $tags;
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}
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public function allowedChildren() {
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$copy = $this->CopyContentFrom();
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if($copy && $copy->exists()) {
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return $copy->allowedChildren();
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}
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return array();
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}
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public function syncLinkTracking() {
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if($this->CopyContentFromID) {
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$this->HasBrokenLink = !(bool) DataObject::get_by_id('SiteTree', $this->CopyContentFromID);
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} else {
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$this->HasBrokenLink = true;
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}
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}
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/**
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* We can only publish the page if there is a published source page
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*
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* @param Member $member Member to check
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* @return bool
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*/
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public function canPublish($member = null) {
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return $this->isPublishable() && parent::canPublish($member);
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}
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/**
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* Returns true if is page is publishable by anyone at all
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* Return false if the source page isn't published yet.
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*
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* Note that isPublishable doesn't affect ete from live, only publish.
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*/
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public function isPublishable() {
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// No source
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if(!$this->CopyContentFrom() || !$this->CopyContentFrom()->ID) {
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return false;
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}
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// Unpublished source
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if(!Versioned::get_versionnumber_by_stage('SiteTree', 'Live', $this->CopyContentFromID)) {
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return false;
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}
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// Default - publishable
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return true;
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}
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/**
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* Generate the CMS fields from the fields from the original page.
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*/
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public function getCMSFields() {
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$fields = parent::getCMSFields();
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// Setup the linking to the original page.
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$copyContentFromField = new TreeDropdownField(
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"CopyContentFromID",
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_t('VirtualPage.CHOOSE', "Linked Page"),
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"SiteTree"
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);
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// filter doesn't let you select children of virtual pages as as source page
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//$copyContentFromField->setFilterFunction(create_function('$item', 'return !($item instanceof 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($roTransformation));
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}
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}
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$msgs = array();
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$fields->addFieldToTab("Root.Main", $copyContentFromField, "Title");
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// Create links back to the original object in the CMS
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if($this->CopyContentFrom()->exists()) {
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$link = "<a class=\"cmsEditlink\" href=\"admin/pages/edit/show/$this->CopyContentFromID\">"
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. _t('VirtualPage.EditLink', 'edit')
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. "</a>";
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$msgs[] = _t(
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'VirtualPage.HEADERWITHLINK',
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"This is a virtual page copying content from \"{title}\" ({link})",
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array(
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'title' => $this->CopyContentFrom()->obj('Title'),
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'link' => $link
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)
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);
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} else {
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$msgs[] = _t('VirtualPage.HEADER', "This is a virtual page");
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$msgs[] = _t(
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'SITETREE.VIRTUALPAGEWARNING',
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'Please choose a linked page and save first in order to publish this page'
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);
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}
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if(
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$this->CopyContentFromID
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&& !Versioned::get_versionnumber_by_stage('SiteTree', 'Live', $this->CopyContentFromID)
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) {
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$msgs[] = _t(
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'SITETREE.VIRTUALPAGEDRAFTWARNING',
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'Please publish the linked page in order to publish the virtual page'
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);
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}
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$fields->addFieldToTab("Root.Main",
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new LiteralField(
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'VirtualPageMessage',
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'<div class="message notice">' . implode('. ', $msgs) . '.</div>'
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),
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'CopyContentFromID'
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);
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return $fields;
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}
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public function onBeforeWrite() {
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parent::onBeforeWrite();
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$this->refreshFromCopied();
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}
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/**
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* Copy any fields from the copied record to bootstrap /backup
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*/
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protected function refreshFromCopied() {
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// Skip if copied record isn't available
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$source = $this->CopyContentFrom();
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if(!$source || !$source->exists()) {
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return;
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}
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// We also want to copy certain, but only if we're copying the source page for the first
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// time. After this point, the user is free to customise these for the virtual page themselves.
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if($this->isChanged('CopyContentFromID', 2) && $this->CopyContentFromID) {
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foreach (self::config()->initially_copied_fields as $fieldName) {
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$this->$fieldName = $source->$fieldName;
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}
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}
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// Copy fields to the original record in case the class type changes
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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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public function getSettingsFields() {
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$fields = parent::getSettingsFields();
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if(!$this->CopyContentFrom()->exists()) {
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$fields->addFieldToTab("Root.Settings",
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new LiteralField(
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'VirtualPageWarning',
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'<div class="message notice">'
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. _t(
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'SITETREE.VIRTUALPAGEWARNINGSETTINGS',
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'Please choose a linked page in the main content fields in order to publish'
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)
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. '</div>'
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),
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'ClassName'
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);
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}
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return $fields;
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}
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public function validate() {
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$result = parent::validate();
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// "Can be root" validation
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$orig = $this->CopyContentFrom();
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if($orig && $orig->exists() && !$orig->stat('can_be_root') && !$this->ParentID) {
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$result->error(
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_t(
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'VirtualPage.PageTypNotAllowedOnRoot',
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'Original page type "{type}" is not allowed on the root level for this virtual page',
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array('type' => $orig->i18n_singular_name())
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),
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'CAN_BE_ROOT_VIRTUAL'
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);
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}
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return $result;
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}
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public function updateImageTracking() {
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// Doesn't work on unsaved records
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if(!$this->ID) return;
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// Remove CopyContentFrom() from the cache
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unset($this->components['CopyContentFrom']);
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// Update ImageTracking
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$this->ImageTracking()->setByIdList($this->CopyContentFrom()->ImageTracking()->column('ID'));
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}
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/**
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* @param string $numChildrenMethod
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* @return string
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*/
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public function CMSTreeClasses($numChildrenMethod="numChildren") {
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return parent::CMSTreeClasses($numChildrenMethod) . ' VirtualPage-' . $this->CopyContentFrom()->ClassName;
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}
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/**
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* Allow attributes on the master page to pass
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* through to the virtual page
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*
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* @param string $field
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* @return mixed
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*/
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public function __get($field) {
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if(parent::hasMethod($funcName = "get$field")) {
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return $this->$funcName();
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} else if(parent::hasField($field) || ($field === 'ID' && !$this->exists())) {
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return $this->getField($field);
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} elseif(($copy = $this->CopyContentFrom()) && $copy->exists()) {
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return $copy->$field;
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}
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}
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public function getField($field) {
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if($this->isFieldVirtualised($field)) {
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return $this->CopyContentFrom()->getField($field);
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}
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return parent::getField($field);
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}
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/**
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* Check if given field is virtualised
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*
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* @param string $field
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* @return bool
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*/
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public function isFieldVirtualised($field) {
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// Don't defer if field is non-virtualised
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$ignore = $this->getNonVirtualisedFields();
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if(in_array($field, $ignore)) {
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return false;
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}
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// Don't defer if no virtual page
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$copied = $this->CopyContentFrom();
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if(!$copied || !$copied->exists()) {
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return false;
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}
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// Check if copied object has this field
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return $copied->hasField($field);
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}
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/**
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* Pass unrecognized method calls on to the original data object
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*
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* @param string $method
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* @param string $args
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* @return mixed
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*/
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public function __call($method, $args) {
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if(parent::hasMethod($method)) {
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return parent::__call($method, $args);
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} else {
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return call_user_func_array(array($this->copyContentFrom(), $method), $args);
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}
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}
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/**
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* @param string $field
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* @return bool
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*/
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public function hasField($field) {
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if(parent::hasField($field)) {
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return true;
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}
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$copy = $this->CopyContentFrom();
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return $copy && $copy->exists() && $copy->hasField($field);
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}
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/**
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* Overwrite to also check for method on the original data object
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*
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* @param string $method
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* @return bool
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*/
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public function hasMethod($method) {
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if(parent::hasMethod($method)) {
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return true;
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}
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// Don't call property setters on copied page
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if(stripos($method, 'set') === 0) {
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return false;
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}
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$copy = $this->CopyContentFrom();
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return $copy && $copy->exists() && $copy->hasMethod($method);
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}
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/**
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* Return the "casting helper" (a piece of PHP code that when evaluated creates a casted value object) for a field
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* on this object.
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*
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* @param string $field
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* @return string
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*/
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public function castingHelper($field) {
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$copy = $this->CopyContentFrom();
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if($copy && $copy->exists() && ($helper = $copy->castingHelper($field))) {
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return $helper;
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}
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return parent::castingHelper($field);
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}
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}
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/**
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* Controller for the virtual page.
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* @package cms
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*/
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class VirtualPage_Controller extends Page_Controller {
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private static $allowed_actions = array(
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'loadcontentall' => 'ADMIN',
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);
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public function getViewer($action) {
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$originalClass = get_class($this->CopyContentFrom());
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if ($originalClass == 'SiteTree') $name = 'Page_Controller';
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else $name = $originalClass."_Controller";
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$controller = new $name();
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return $controller->getViewer($action);
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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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public function init(){
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parent::init();
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$this->__call('init', array());
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}
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/**
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* Also check the original object's original controller for the method
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*
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* @param string $method
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* @return bool
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*/
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public function hasMethod($method) {
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$haveIt = parent::hasMethod($method);
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if (!$haveIt) {
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$originalClass = get_class($this->CopyContentFrom());
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if ($originalClass == 'SiteTree') $name = 'ContentController';
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else $name = $originalClass."_Controller";
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$controller = new $name($this->dataRecord->copyContentFrom());
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$haveIt = $controller->hasMethod($method);
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}
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return $haveIt;
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}
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/**
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* Pass unrecognized method calls on to the original controller
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*
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* @param string $method
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* @param string $args
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* @return mixed
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*
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* @throws Exception Any error other than a 'no method' error.
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*/
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public function __call($method, $args) {
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// Check if we can safely call this method before passing it back
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// to custom methods.
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if($this->getExtraMethodConfig($method)) {
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return parent::__call($method, $args);
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}
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// Pass back to copied page
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$original = $this->copyContentFrom();
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$controller = ModelAsController::controller_for($original);
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// Ensure request/response data is available on virtual controller
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$controller->setRequest($this->getRequest());
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$controller->response = $this->response; // @todo - replace with getter/setter in 3.3
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return call_user_func_array(array($controller, $method), $args);
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}
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}
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