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<?php |
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// namespace SilverStripe\Framework\Model\Versioning |
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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 { |
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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 $indexes = array( |
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'ObjectUniquePerChangeSet' => array( |
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'type' => 'unique', |
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'value' => '"ObjectID", "ObjectClass", "ChangeSetID"' |
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) |
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); |
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/** |
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* Get the type of change: none, created, deleted, modified, manymany |
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* |
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* @return string |
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*/ |
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public function getChangeType() { |
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// Get change versions |
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if($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 $stage |
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* @return Versioned|DataObject |
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*/ |
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private function getObjectInStage($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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* 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 = Versioned::get_latest_version($this->ObjectClass, $this->ObjectID); |
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if(!$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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View Code Duplication |
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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View Code Duplication |
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 $context |
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* @return bool |
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*/ |
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View Code Duplication |
public function can($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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