476 lines
14 KiB
PHP
476 lines
14 KiB
PHP
<?php
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namespace SilverStripe\ORM\Versioning;
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use SilverStripe\ORM\CMSPreviewable;
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use SilverStripe\Assets\Thumbnail;
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use SilverStripe\Control\Controller;
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use SilverStripe\ORM\ArrayList;
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use SilverStripe\ORM\DataList;
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use SilverStripe\ORM\DataObject;
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use SilverStripe\ORM\ManyManyList;
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use SilverStripe\ORM\SS_List;
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use SilverStripe\ORM\UnexpectedDataException;
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use SilverStripe\Security\Member;
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use SilverStripe\Security\Permission;
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use BadMethodCallException;
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use Exception;
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/**
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* A single line in a changeset
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*
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* @property string $Added
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* @property string $ObjectClass The _base_ data class for the referenced DataObject
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* @property int $ObjectID The numeric ID for the referenced object
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* @method ManyManyList ReferencedBy() List of explicit items that require this change
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* @method ManyManyList References() List of implicit items required by this change
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* @method ChangeSet ChangeSet()
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*/
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class ChangeSetItem extends DataObject implements Thumbnail
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{
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const EXPLICITLY = 'explicitly';
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const IMPLICITLY = 'implicitly';
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/** Represents an object deleted */
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const CHANGE_DELETED = 'deleted';
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/** Represents an object which was modified */
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const CHANGE_MODIFIED = 'modified';
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/** Represents an object added */
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const CHANGE_CREATED = 'created';
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/** Represents an object which hasn't been changed directly, but owns a modified many_many relationship. */
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//const CHANGE_MANYMANY = 'manymany';
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private static $table_name = 'ChangeSetItem';
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/**
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* Represents that an object has not yet been changed, but
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* should be included in this changeset as soon as any changes exist
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*/
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const CHANGE_NONE = 'none';
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private static $db = array(
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'VersionBefore' => 'Int',
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'VersionAfter' => 'Int',
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'Added' => "Enum('explicitly, implicitly', 'implicitly')"
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);
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private static $has_one = array(
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'ChangeSet' => 'SilverStripe\ORM\Versioning\ChangeSet',
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'Object' => 'SilverStripe\ORM\DataObject',
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);
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private static $many_many = array(
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'ReferencedBy' => 'SilverStripe\ORM\Versioning\ChangeSetItem'
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);
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private static $belongs_many_many = array(
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'References' => 'ChangeSetItem.ReferencedBy'
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);
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private static $indexes = array(
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'ObjectUniquePerChangeSet' => array(
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'type' => 'unique',
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'value' => '"ObjectID", "ObjectClass", "ChangeSetID"'
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)
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);
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public function onBeforeWrite()
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{
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// Make sure ObjectClass refers to the base data class in the case of old or wrong code
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$this->ObjectClass = $this->getSchema()->baseDataClass($this->ObjectClass);
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parent::onBeforeWrite();
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}
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public function getTitle()
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{
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// Get title of modified object
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$object = $this->getObjectLatestVersion();
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if ($object) {
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return $object->getTitle();
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}
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return $this->i18n_singular_name() . ' #' . $this->ID;
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}
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/**
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* Get a thumbnail for this object
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*
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* @param int $width Preferred width of the thumbnail
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* @param int $height Preferred height of the thumbnail
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* @return string URL to the thumbnail, if available
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*/
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public function ThumbnailURL($width, $height)
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{
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$object = $this->getObjectLatestVersion();
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if ($object instanceof Thumbnail) {
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return $object->ThumbnailURL($width, $height);
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}
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return null;
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}
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/**
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* Get the type of change: none, created, deleted, modified, manymany
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* @return string
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* @throws UnexpectedDataException
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*/
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public function getChangeType()
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{
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if (!class_exists($this->ObjectClass)) {
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throw new UnexpectedDataException("Invalid Class '{$this->ObjectClass}' in ChangeSetItem #{$this->ID}");
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}
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// Get change versions
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if ($this->VersionBefore || $this->VersionAfter) {
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$draftVersion = $this->VersionAfter; // After publishing draft was written to stage
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$liveVersion = $this->VersionBefore; // The live version before the publish
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} else {
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$draftVersion = Versioned::get_versionnumber_by_stage(
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$this->ObjectClass,
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Versioned::DRAFT,
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$this->ObjectID,
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false
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);
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$liveVersion = Versioned::get_versionnumber_by_stage(
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$this->ObjectClass,
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Versioned::LIVE,
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$this->ObjectID,
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false
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);
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}
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// Version comparisons
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if ($draftVersion == $liveVersion) {
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return self::CHANGE_NONE;
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} elseif (!$liveVersion) {
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return self::CHANGE_CREATED;
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} elseif (!$draftVersion) {
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return self::CHANGE_DELETED;
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} else {
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return self::CHANGE_MODIFIED;
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}
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}
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/**
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* Find version of this object in the given stage
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*
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* @param string $stage
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* @return DataObject|Versioned
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* @throws UnexpectedDataException
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*/
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protected function getObjectInStage($stage)
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{
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if (!class_exists($this->ObjectClass)) {
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throw new UnexpectedDataException("Invalid Class '{$this->ObjectClass}' in ChangeSetItem #{$this->ID}");
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}
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return Versioned::get_by_stage($this->ObjectClass, $stage)->byID($this->ObjectID);
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}
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/**
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* Find latest version of this object
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* @return DataObject|Versioned
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* @throws UnexpectedDataException
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*/
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protected function getObjectLatestVersion()
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{
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if (!class_exists($this->ObjectClass)) {
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throw new UnexpectedDataException("Invalid Class '{$this->ObjectClass}' in ChangeSetItem #{$this->ID}");
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}
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return Versioned::get_latest_version($this->ObjectClass, $this->ObjectID);
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}
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/**
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* Get all implicit objects for this change
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*
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* @return SS_List
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*/
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public function findReferenced()
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{
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if ($this->getChangeType() === ChangeSetItem::CHANGE_DELETED) {
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// If deleted from stage, need to look at live record
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$record = $this->getObjectInStage(Versioned::LIVE);
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if ($record) {
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return $record->findOwners(false);
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}
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} else {
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// If changed on stage, look at owned objects there
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$record = $this->getObjectInStage(Versioned::DRAFT);
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if ($record) {
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return $record->findOwned()->filterByCallback(function ($owned) {
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/** @var Versioned|DataObject $owned */
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return $owned->stagesDiffer(Versioned::DRAFT, Versioned::LIVE);
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});
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}
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}
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// Empty set
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return new ArrayList();
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}
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/**
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* Publish this item, then close it.
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*
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* Note: Unlike Versioned::doPublish() and Versioned::doUnpublish, this action is not recursive.
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*/
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public function publish()
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{
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if (!class_exists($this->ObjectClass)) {
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throw new UnexpectedDataException("Invalid Class '{$this->ObjectClass}' in ChangeSetItem #{$this->ID}");
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}
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// Logical checks prior to publish
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if (!$this->canPublish()) {
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throw new Exception("The current member does not have permission to publish this ChangeSetItem.");
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}
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if ($this->VersionBefore || $this->VersionAfter) {
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throw new BadMethodCallException("This ChangeSetItem has already been published");
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}
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// Record state changed
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$this->VersionAfter = Versioned::get_versionnumber_by_stage(
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$this->ObjectClass,
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Versioned::DRAFT,
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$this->ObjectID,
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false
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);
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$this->VersionBefore = Versioned::get_versionnumber_by_stage(
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$this->ObjectClass,
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Versioned::LIVE,
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$this->ObjectID,
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false
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);
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switch ($this->getChangeType()) {
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case static::CHANGE_NONE: {
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break;
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}
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case static::CHANGE_DELETED: {
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// Non-recursive delete
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$object = $this->getObjectInStage(Versioned::LIVE);
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$object->deleteFromStage(Versioned::LIVE);
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break;
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}
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case static::CHANGE_MODIFIED:
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case static::CHANGE_CREATED: {
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// Non-recursive publish
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$object = $this->getObjectInStage(Versioned::DRAFT);
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$object->publishSingle();
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break;
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}
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}
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$this->write();
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}
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/**
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* Once this item (and all owned objects) are published, unlink
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* all disowned objects
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*/
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public function unlinkDisownedObjects()
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{
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$object = $this->getObjectInStage(Versioned::DRAFT);
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if ($object) {
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$object->unlinkDisownedObjects(Versioned::DRAFT, Versioned::LIVE);
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}
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}
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/** Reverts this item, then close it. **/
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public function revert()
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{
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user_error('Not implemented', E_USER_ERROR);
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}
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public function canView($member = null)
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{
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return $this->can(__FUNCTION__, $member);
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}
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public function canEdit($member = null)
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{
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return $this->can(__FUNCTION__, $member);
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}
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public function canCreate($member = null, $context = array())
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{
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return $this->can(__FUNCTION__, $member, $context);
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}
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public function canDelete($member = null)
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{
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return $this->can(__FUNCTION__, $member);
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}
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/**
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* Check if the BeforeVersion of this changeset can be restored to draft
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*
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* @param Member $member
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* @return bool
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*/
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public function canRevert($member)
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{
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// Just get the best version as this object may not even exist on either stage anymore.
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/** @var Versioned|DataObject $object */
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$object = $this->getObjectLatestVersion();
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if (!$object) {
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return false;
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}
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// Check change type
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switch ($this->getChangeType()) {
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case static::CHANGE_CREATED: {
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// Revert creation by deleting from stage
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return $object->canDelete($member);
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}
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default: {
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// All other actions are typically editing draft stage
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return $object->canEdit($member);
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}
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}
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}
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/**
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* Check if this ChangeSetItem can be published
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*
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* @param Member $member
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* @return bool
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*/
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public function canPublish($member = null)
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{
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// Check canMethod to invoke on object
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switch ($this->getChangeType()) {
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case static::CHANGE_DELETED: {
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/** @var Versioned|DataObject $object */
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$object = Versioned::get_by_stage($this->ObjectClass, Versioned::LIVE)->byID($this->ObjectID);
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if ($object) {
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return $object->canUnpublish($member);
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}
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break;
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}
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default: {
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/** @var Versioned|DataObject $object */
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$object = Versioned::get_by_stage($this->ObjectClass, Versioned::DRAFT)->byID($this->ObjectID);
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if ($object) {
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return $object->canPublish($member);
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}
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break;
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}
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}
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return true;
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}
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/**
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* Determine if this item has changes
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*
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* @return bool
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*/
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public function hasChange()
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{
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return $this->getChangeType() !== ChangeSetItem::CHANGE_NONE;
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}
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/**
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* Default permissions for this ChangeSetItem
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*
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* @param string $perm
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* @param Member $member
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* @param array $context
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* @return bool
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*/
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public function can($perm, $member = null, $context = array())
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{
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if (!$member) {
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$member = Member::currentUser();
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}
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// Allow extensions to bypass default permissions, but only if
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// each change can be individually published.
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$extended = $this->extendedCan($perm, $member, $context);
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if ($extended !== null) {
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return $extended;
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}
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// Default permissions
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return (bool)Permission::checkMember($member, ChangeSet::config()->required_permission);
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}
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/**
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* Get the ChangeSetItems that reference a passed DataObject
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*
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* @param DataObject $object
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* @return DataList
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*/
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public static function get_for_object($object)
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{
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return ChangeSetItem::get()->filter([
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'ObjectID' => $object->ID,
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'ObjectClass' => $object->baseClass(),
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]);
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}
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/**
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* Get the ChangeSetItems that reference a passed DataObject
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*
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* @param int $objectID The ID of the object
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* @param string $objectClass The class of the object (or any parent class)
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* @return DataList
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*/
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public static function get_for_object_by_id($objectID, $objectClass)
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{
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return ChangeSetItem::get()->filter([
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'ObjectID' => $objectID,
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'ObjectClass' => static::getSchema()->baseDataClass($objectClass)
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]);
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}
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/**
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* Gets the list of modes this record can be previewed in.
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*
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* {@link https://tools.ietf.org/html/draft-kelly-json-hal-07#section-5}
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*
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* @return array Map of links in acceptable HAL format
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*/
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public function getPreviewLinks()
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{
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$links = [];
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// Preview draft
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$stage = $this->getObjectInStage(Versioned::DRAFT);
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if ($stage instanceof CMSPreviewable && $stage->canView() && ($link = $stage->PreviewLink())) {
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$links[Versioned::DRAFT] = [
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'href' => Controller::join_links($link, '?stage=' . Versioned::DRAFT),
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'type' => $stage->getMimeType(),
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];
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}
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// Preview live
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$live = $this->getObjectInStage(Versioned::LIVE);
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if ($live instanceof CMSPreviewable && $live->canView() && ($link = $live->PreviewLink())) {
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$links[Versioned::LIVE] = [
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'href' => Controller::join_links($link, '?stage=' . Versioned::LIVE),
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'type' => $live->getMimeType(),
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];
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}
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return $links;
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}
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/**
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* Get edit link for this item
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*
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* @return string
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*/
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public function CMSEditLink()
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{
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$link = $this->getObjectInStage(Versioned::DRAFT);
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if ($link instanceof CMSPreviewable) {
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return $link->CMSEditLink();
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}
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return null;
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}
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}
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