mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-10-22 14:05:37 +02:00
472 lines
12 KiB
PHP
472 lines
12 KiB
PHP
<?php
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// namespace SilverStripe\Framework\Model\Versioning
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/**
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* The ChangeSet model tracks several VersionedAndStaged objects for later publication as a single
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* atomic action
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*
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* @method HasManyList Changes()
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* @method Member Owner()
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* @property string $Name
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* @property string $State
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*
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* @package framework
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* @subpackage model
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*/
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class ChangeSet extends DataObject {
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private static $singular_name = 'Campaign';
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private static $plural_name = 'Campaigns';
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/** An active changeset */
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const STATE_OPEN = 'open';
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/** A changeset which is reverted and closed */
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const STATE_REVERTED = 'reverted';
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/** A changeset which is published and closed */
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const STATE_PUBLISHED = 'published';
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private static $db = array(
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'Name' => 'Varchar',
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'State' => "Enum('open,published,reverted','open')",
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);
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private static $has_many = array(
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'Changes' => 'ChangeSetItem',
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);
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private static $defaults = array(
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'State' => 'open'
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);
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private static $has_one = array(
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'Owner' => 'Member',
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);
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private static $casting = array(
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'Description' => 'Text',
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);
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/**
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* List of classes to set apart in description
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*
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* @config
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* @var array
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*/
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private static $important_classes = array(
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'SiteTree',
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'File',
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);
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/**
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* Default permission to require for publishers.
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* Publishers must either be able to use the campaign admin, or have all admin access.
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*
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* Also used as default permission for ChangeSetItem default permission.
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*
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* @config
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* @var array
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*/
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private static $required_permission = array('CMS_ACCESS_CampaignAdmin', 'CMS_ACCESS_LeftAndMain');
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/**
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* Publish this changeset, then closes it.
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*
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* @throws Exception
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*/
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public function publish() {
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// Logical checks prior to publish
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if($this->State !== static::STATE_OPEN) {
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throw new BadMethodCallException(
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"ChangeSet can't be published if it has been already published or reverted."
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);
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}
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if(!$this->isSynced()) {
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throw new ValidationException(
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"ChangeSet does not include all necessary changes and cannot be published."
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);
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}
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if(!$this->canPublish()) {
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throw new LogicException("The current member does not have permission to publish this ChangeSet.");
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}
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DB::get_conn()->withTransaction(function(){
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foreach($this->Changes() as $change) {
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/** @var ChangeSetItem $change */
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$change->publish();
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}
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$this->State = static::STATE_PUBLISHED;
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$this->write();
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});
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}
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/**
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* Add a new change to this changeset. Will automatically include all owned
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* changes as those are dependencies of this item.
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*
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* @param DataObject $object
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*/
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public function addObject(DataObject $object) {
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if(!$this->isInDB()) {
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throw new BadMethodCallException("ChangeSet must be saved before adding items");
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}
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$references = [
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'ObjectID' => $object->ID,
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'ObjectClass' => ClassInfo::baseDataClass($object)
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];
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// Get existing item in case already added
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$item = $this->Changes()->filter($references)->first();
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if (!$item) {
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$item = new ChangeSetItem($references);
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$this->Changes()->add($item);
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}
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$item->ReferencedBy()->removeAll();
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$item->Added = ChangeSetItem::EXPLICITLY;
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$item->write();
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$this->sync();
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}
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/**
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* Remove an item from this changeset. Will automatically remove all changes
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* which own (and thus depend on) the removed item.
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*
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* @param DataObject $object
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*/
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public function removeObject(DataObject $object) {
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$item = ChangeSetItem::get()->filter([
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'ObjectID' => $object->ID,
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'ObjectClass' => ClassInfo::baseDataClass($object),
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'ChangeSetID' => $this->ID
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])->first();
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if ($item) {
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// TODO: Handle case of implicit added item being removed.
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$item->delete();
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}
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$this->sync();
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}
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protected function implicitKey($item) {
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if ($item instanceof ChangeSetItem) return $item->ObjectClass.'.'.$item->ObjectID;
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return ClassInfo::baseDataClass($item).'.'.$item->ID;
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}
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protected function calculateImplicit() {
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/** @var string[][] $explicit List of all items that have been explicitly added to this ChangeSet */
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$explicit = array();
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/** @var string[][] $referenced List of all items that are "referenced" by items in $explicit */
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$referenced = array();
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/** @var string[][] $references List of which explicit items reference each thing in referenced */
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$references = array();
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foreach ($this->Changes()->filter(['Added' => ChangeSetItem::EXPLICITLY]) as $item) {
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$explicitKey = $this->implicitKey($item);
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$explicit[$explicitKey] = true;
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foreach ($item->findReferenced() as $referee) {
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$key = $this->implicitKey($referee);
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$referenced[$key] = [
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'ObjectID' => $referee->ID,
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'ObjectClass' => ClassInfo::baseDataClass($referee)
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];
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$references[$key][] = $item->ID;
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}
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}
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/** @var string[][] $explicit List of all items that are either in $explicit, $referenced or both */
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$all = array_merge($referenced, $explicit);
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/** @var string[][] $implicit Anything that is in $all, but not in $explicit, is an implicit inclusion */
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$implicit = array_diff_key($all, $explicit);
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foreach($implicit as $key => $object) {
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$implicit[$key]['ReferencedBy'] = $references[$key];
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}
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return $implicit;
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}
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/**
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* Add implicit changes that should be included in this changeset
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*
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* When an item is created or changed, all it's owned items which have
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* changes are implicitly added
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*
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* When an item is deleted, it's owner (even if that owner does not have changes)
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* is implicitly added
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*/
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public function sync() {
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// Start a transaction (if we can)
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DB::get_conn()->withTransaction(function() {
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// Get the implicitly included items for this ChangeSet
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$implicit = $this->calculateImplicit();
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// Adjust the existing implicit ChangeSetItems for this ChangeSet
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foreach ($this->Changes()->filter(['Added' => ChangeSetItem::IMPLICITLY]) as $item) {
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$objectKey = $this->implicitKey($item);
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// If a ChangeSetItem exists, but isn't in $implicit, it's no longer required, so delete it
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if (!array_key_exists($objectKey, $implicit)) {
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$item->delete();
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}
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// Otherwise it is required, so update ReferencedBy and remove from $implicit
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else {
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$item->ReferencedBy()->setByIDList($implicit[$objectKey]['ReferencedBy']);
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unset($implicit[$objectKey]);
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}
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}
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// Now $implicit is all those items that are implicitly included, but don't currently have a ChangeSetItem.
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// So create new ChangeSetItems to match
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foreach ($implicit as $key => $props) {
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$item = new ChangeSetItem($props);
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$item->Added = ChangeSetItem::IMPLICITLY;
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$item->ChangeSetID = $this->ID;
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$item->ReferencedBy()->setByIDList($props['ReferencedBy']);
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$item->write();
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}
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});
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}
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/** Verify that any objects in this changeset include all owned changes */
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public function isSynced() {
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$implicit = $this->calculateImplicit();
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// Check the existing implicit ChangeSetItems for this ChangeSet
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foreach ($this->Changes()->filter(['Added' => ChangeSetItem::IMPLICITLY]) as $item) {
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$objectKey = $this->implicitKey($item);
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// If a ChangeSetItem exists, but isn't in $implicit -> validation failure
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if (!array_key_exists($objectKey, $implicit)) return false;
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// Exists, remove from $implicit
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unset($implicit[$objectKey]);
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}
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// If there's anything left in $implicit -> validation failure
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return empty($implicit);
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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 this item is allowed to 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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// All changes must be publishable
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foreach($this->Changes() as $change) {
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/** @var ChangeSetItem $change */
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if(!$change->canPublish($member)) {
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return false;
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}
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}
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// Default permission
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return $this->can(__FUNCTION__, $member);
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}
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/**
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* Check if this changeset (if published) can be reverted
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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 = null) {
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// All changes must be publishable
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foreach($this->Changes() as $change) {
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/** @var ChangeSetItem $change */
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if(!$change->canRevert($member)) {
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return false;
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}
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}
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// Default permission
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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 changeset
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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, $this->config()->required_permission);
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}
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public function getCMSFields() {
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$fields = new FieldList();
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$fields->push(TextField::create('Name'));
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if($this->isInDB()) {
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$state = ReadonlyField::create('State')
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->setDontEscape(true);
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$fields->push($state); // Escape is done in react
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}
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$this->extend('updateCMSFields', $fields);
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return $fields;
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}
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/**
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* Gets summary of items in changeset
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*
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* @return string
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*/
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public function getDescription() {
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// Initialise list of items to count
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$counted = [];
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$countedOther = 0;
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foreach($this->config()->important_classes as $type) {
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if(class_exists($type)) {
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$counted[$type] = 0;
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}
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}
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// Check each change item
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/** @var ChangeSetItem $change */
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foreach($this->Changes() as $change) {
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$found = false;
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foreach($counted as $class => $num) {
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if(is_a($change->ObjectClass, $class, true)) {
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$counted[$class]++;
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$found = true;
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break;
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}
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}
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if(!$found) {
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$countedOther++;
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}
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}
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// Describe set based on this output
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$counted = array_filter($counted);
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// Empty state
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if(empty($counted) && empty($countedOther)) {
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return '';
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}
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// Put all parts together
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$parts = [];
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foreach($counted as $class => $count) {
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$parts[] = DataObject::singleton($class)->i18n_pluralise($count);
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}
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// Describe non-important items
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if($countedOther) {
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if ($counted) {
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$parts[] = i18n::pluralise(
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_t('ChangeSet.DESCRIPTION_OTHER_ITEM', 'other item'),
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_t('ChangeSet.DESCRIPTION_OTHER_ITEMS', 'other items'),
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$countedOther
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);
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} else {
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$parts[] = i18n::pluralise(
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_t('ChangeSet.DESCRIPTION_ITEM', 'item'),
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_t('ChangeSet.DESCRIPTION_ITEMS', 'items'),
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$countedOther
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);
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}
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}
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// Figure out how to join everything together
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if(empty($parts)) {
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return '';
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}
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if(count($parts) === 1) {
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return $parts[0];
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}
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// Non-comma list
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if(count($parts) === 2) {
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return _t(
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'ChangeSet.DESCRIPTION_AND',
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'{first} and {second}',
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[
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'first' => $parts[0],
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'second' => $parts[1],
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]
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);
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}
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// First item
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$string = _t(
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'ChangeSet.DESCRIPTION_LIST_FIRST',
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'{item}',
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['item' => $parts[0]]
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);
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// Middle items
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for($i = 1; $i < count($parts) - 1; $i++) {
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$string = _t(
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'ChangeSet.DESCRIPTION_LIST_MID',
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'{list}, {item}',
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[
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'list' => $string,
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'item' => $parts[$i]
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]
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);
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}
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// Oxford comma
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$string = _t(
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'ChangeSet.DESCRIPTION_LIST_LAST',
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'{list}, and {item}',
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[
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'list' => $string,
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'item' => end($parts)
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]
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);
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return $string;
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}
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}
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