mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-10-22 14:05:37 +02:00
319 lines
8.3 KiB
PHP
319 lines
8.3 KiB
PHP
<?php
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// namespace SilverStripe\Framework\Model\Versioning
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use SilverStripe\Filesystem\Thumbnail;
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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
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* @property int $ObjectID
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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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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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/**
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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' => 'ChangeSet',
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'Object' => 'DataObject',
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);
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private static $many_many = array(
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'ReferencedBy' => '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 $indexes = array(
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'ObjectUniquePerChangeSet' => array(
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'type' => 'unique',
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'value' => '"ObjectID", "ObjectClass", "ChangeSetID"'
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)
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);
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public function getTitle() {
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// Get title of modified object
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$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, $height) {
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$object = $this->getObjectLatestVersion();
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if($object instanceof Thumbnail) {
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return $object->ThumbnailURL($width, $height);
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}
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return null;
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}
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/**
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* Get the type of change: none, created, deleted, modified, manymany
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*
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* @return string
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*/
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public function getChangeType() {
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// Get change versions
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if($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, Versioned::DRAFT, $this->ObjectID, false
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);
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$liveVersion = Versioned::get_versionnumber_by_stage(
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$this->ObjectClass, Versioned::LIVE, $this->ObjectID, false
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);
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}
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// Version comparisons
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if ($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 $stage
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* @return Versioned|DataObject
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*/
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protected function getObjectInStage($stage) {
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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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*
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* @return Versioned|DataObject
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*/
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protected function getObjectLatestVersion() {
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return Versioned::get_latest_version($this->ObjectClass, $this->ObjectID);
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}
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/**
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* Get all implicit objects for this change
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*
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* @return SS_List
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*/
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public function findReferenced() {
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if($this->getChangeType() === ChangeSetItem::CHANGE_DELETED) {
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// If deleted from stage, need to look at live record
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return $this->getObjectInStage(Versioned::LIVE)->findOwners(false);
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} else {
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// If changed on stage, look at owned objects there
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return $this->getObjectInStage(Versioned::DRAFT)->findOwned()->filterByCallback(function ($owned) {
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/** @var Versioned|DataObject $owned */
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return $owned->stagesDiffer(Versioned::DRAFT, Versioned::LIVE);
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});
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}
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}
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/**
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* Publish this item, then close it.
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*
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* Note: Unlike Versioned::doPublish() and Versioned::doUnpublish, this action is not recursive.
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*/
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public function publish() {
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// Logical checks prior to publish
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if(!$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, Versioned::DRAFT, $this->ObjectID, false
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);
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$this->VersionBefore = Versioned::get_versionnumber_by_stage(
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$this->ObjectClass, Versioned::LIVE, $this->ObjectID, false
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);
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switch($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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$this->write();
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}
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/** Reverts this item, then close it. **/
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public function revert() {
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user_error('Not implemented', E_USER_ERROR);
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}
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public function canView($member = null) {
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return $this->can(__FUNCTION__, $member);
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}
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public function canEdit($member = null) {
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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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return $this->can(__FUNCTION__, $member, $context);
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}
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public function canDelete($member = null) {
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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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// 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($this->getChangeType()) {
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case static::CHANGE_CREATED: {
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// Revert creation by deleting from stage
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if(!$object->canDelete($member)) {
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return false;
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}
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break;
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}
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default: {
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// All other actions are typically editing draft stage
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if(!$object->canEdit($member)) {
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return false;
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}
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break;
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}
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}
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// If object can be published/unpublished let extensions deny
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return $this->can(__FUNCTION__, $member);
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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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// 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(!$object || !$object->canUnpublish($member)) {
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return false;
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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(!$object || !$object->canPublish($member)) {
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return false;
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}
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break;
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}
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}
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// If object can be published/unpublished let extensions deny
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return $this->can(__FUNCTION__, $member);
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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, $context = array()) {
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if(!$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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