TrashService - Code Metrics - Inspection of "Merge branch '7.2'" - ezsystems/ezpublish-kernel - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 6c5a34...58d4d9 )

by André

created 2018-09-10 03:05 UTC

TrashService B

↳ Parent: Project

Complexity

Total Complexity

Size/Duplication

Total Lines	344
Duplicated Lines	7.27 %

Coupling/Cohesion

Components	1
Dependencies	17

Importance

Changes

Metric	Value
dl	25
loc	344
rs	8.5599
c	0
b	0
f	0
wmc	48
lcom	1
cbo	17

10 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	14	1
A	loadTrashItem()	0	17	3
B	trash()	0	32	6
C	recover()	0	53	11
A	emptyTrash()	0	19	3
A	deleteTrashItem()	0	19	4
C	findTrashItems()	6	40	15
A	buildDomainTrashItems()	0	17	3
A	buildDomainTrashItemObject()	19	19	1
A	getDateTime()	0	7	1

How to fix Duplicated Code Complexity

Duplicated Code

Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.

Common duplication problems, and corresponding solutions are:

If you have the same expression in different places: Extract expression to a method
If you have the same method in different sub-classes: Extract method, and pull up field to the parent class
If you have the same code in unrelated classes: Consider extracting the code to a new class, and injecting that class

Complex Class

Tip: Before tackling complexity, make sure that you eliminate any duplication first. This often can reduce the size of classes significantly.

Complex classes like TrashService often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.

Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.

While breaking up the class, it is a good idea to analyze how other classes use TrashService, and based on these observations, apply Extract Interface, too.

<?php

/**
 * File containing the eZ\Publish\Core\Repository\TrashService class.
 *
 * @copyright Copyright (C) eZ Systems AS. All rights reserved.
 * @license For full copyright and license information view LICENSE file distributed with this source code.
 */
namespace eZ\Publish\Core\Repository;

use eZ\Publish\API\Repository\TrashService as TrashServiceInterface;
use eZ\Publish\API\Repository\Repository as RepositoryInterface;
use eZ\Publish\API\Repository\Values\Content\Content;
use eZ\Publish\API\Repository\Exceptions\UnauthorizedException as APIUnauthorizedException;
use eZ\Publish\SPI\Persistence\Handler;
use eZ\Publish\API\Repository\Values\Content\Location;
use eZ\Publish\Core\Repository\Values\Content\TrashItem;
use eZ\Publish\API\Repository\Values\Content\TrashItem as APITrashItem;
use eZ\Publish\API\Repository\Values\Content\Query;
use eZ\Publish\SPI\Persistence\Content\Location\Trashed;
use eZ\Publish\Core\Base\Exceptions\InvalidArgumentValue;
use eZ\Publish\Core\Base\Exceptions\UnauthorizedException;
use eZ\Publish\API\Repository\Values\Content\Trash\SearchResult;
use eZ\Publish\API\Repository\Values\Content\Query\Criterion;
use eZ\Publish\API\Repository\Values\Content\Query\SortClause;
use DateTime;
use Exception;

/**
 * Trash service, used for managing trashed content.
 */
class TrashService implements TrashServiceInterface
{
    /**
     * @var \eZ\Publish\Core\Repository\Repository
     */
    protected $repository;

    /**
     * @var \eZ\Publish\SPI\Persistence\Handler
     */
    protected $persistenceHandler;

    /**
     * @var array
     */
    protected $settings;

    /**
     * @var \eZ\Publish\Core\Repository\Helper\NameSchemaService
     */
    protected $nameSchemaService;

    /**
     * Setups service with reference to repository object that created it & corresponding handler.
     *
     * @param \eZ\Publish\API\Repository\Repository $repository
     * @param \eZ\Publish\SPI\Persistence\Handler $handler
     * @param \eZ\Publish\Core\Repository\Helper\NameSchemaService $nameSchemaService
     * @param array $settings
     */
    public function __construct(
        RepositoryInterface $repository,
        Handler $handler,
        Helper\NameSchemaService $nameSchemaService,
        array $settings = array()
    ) {
        $this->repository = $repository;
class Alien {}

class Dalek extends Alien {}

class Plot
{
    /** @var  Dalek */
    public $villain;
}

$alien = new Alien();
$plot = new Plot();
if ($alien instanceof Dalek) {
    $plot->villain = $alien;
}
        $this->persistenceHandler = $handler;
        $this->nameSchemaService = $nameSchemaService;
        // Union makes sure default settings are ignored if provided in argument
        $this->settings = $settings + array(
            //'defaultSetting' => array(),
        );
    }

    /**
     * Loads a trashed location object from its $id.
     *
     * Note that $id is identical to original location, which has been previously trashed
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the user is not allowed to read the trashed location
     * @throws \eZ\Publish\API\Repository\Exceptions\NotFoundException - if the location with the given id does not exist
     *
     * @param mixed $trashItemId
     *
     * @return \eZ\Publish\API\Repository\Values\Content\TrashItem
     */
    public function loadTrashItem($trashItemId)
    {
        $spiTrashItem = $this->persistenceHandler->trashHandler()->loadTrashItem($trashItemId);
        $trash = $this->buildDomainTrashItemObject(
            $spiTrashItem,
            $this->repository->getContentService()->internalLoadContent($spiTrashItem->contentId)

        );
        if (!$this->repository->canUser('content', 'read', $trash->getContentInfo())) {

            throw new UnauthorizedException('content', 'read');
        }

        if (!$this->repository->canUser('content', 'restore', $trash->getContentInfo())) {

            throw new UnauthorizedException('content', 'restore');
        }

        return $trash;
    }

    /**
     * Sends $location and all its children to trash and returns the corresponding trash item.
     *
     * The current user may not have access to the returned trash item, check before using it.
     * Content is left untouched.
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the user is not allowed to trash the given location
     *
     * @param \eZ\Publish\API\Repository\Values\Content\Location $location
     *
     * @return null|\eZ\Publish\API\Repository\Values\Content\TrashItem null if location was deleted, otherwise TrashItem
     */
    public function trash(Location $location)
    {
        if (!is_numeric($location->id)) {
            throw new InvalidArgumentValue('id', $location->id, 'Location');
        }

        if (!$this->repository->canUser('content', 'remove', $location->getContentInfo(), [$location])) {

            throw new UnauthorizedException('content', 'remove');
        }

        $this->repository->beginTransaction();
        try {
            $spiTrashItem = $this->persistenceHandler->trashHandler()->trashSubtree($location->id);
            $this->persistenceHandler->urlAliasHandler()->locationDeleted($location->id);
            $this->repository->commit();
        } catch (Exception $e) {
            $this->repository->rollback();
            throw $e;
        }

        // Use internalLoadContent() as we want a trash item regardless of user access to the trash or not.
        try {
            return isset($spiTrashItem)
                ? $this->buildDomainTrashItemObject(
                    $spiTrashItem,
                    $this->repository->getContentService()->internalLoadContent($spiTrashItem->contentId)

                )
                : null;
        } catch (Exception $e) {
            return null;
        }
    }

    /**
     * Recovers the $trashedLocation at its original place if possible.
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the user is not allowed to recover the trash item at the parent location location
     *
     * If $newParentLocation is provided, $trashedLocation will be restored under it.
     *
     * @param \eZ\Publish\API\Repository\Values\Content\TrashItem $trashItem
     * @param \eZ\Publish\API\Repository\Values\Content\Location $newParentLocation
     *
     * @return \eZ\Publish\API\Repository\Values\Content\Location the newly created or recovered location
     */
    public function recover(APITrashItem $trashItem, Location $newParentLocation = null)
    {
        if (!is_numeric($trashItem->id)) {
            throw new InvalidArgumentValue('id', $trashItem->id, 'TrashItem');
        }

        if ($newParentLocation === null && !is_numeric($trashItem->parentLocationId)) {
            throw new InvalidArgumentValue('parentLocationId', $trashItem->parentLocationId, 'TrashItem');
        }

        if ($newParentLocation !== null && !is_numeric($newParentLocation->id)) {
            throw new InvalidArgumentValue('parentLocationId', $newParentLocation->id, 'Location');
        }

        if (!$this->repository->canUser(

            'content',
            'restore',
            $trashItem->getContentInfo(),
            [$newParentLocation ?: $trashItem]
        )) {
            throw new UnauthorizedException('content', 'restore');
        }

        $this->repository->beginTransaction();
        try {
            $newParentLocationId = $newParentLocation ? $newParentLocation->id : $trashItem->parentLocationId;
            $newLocationId = $this->persistenceHandler->trashHandler()->recover(
                $trashItem->id,
                $newParentLocationId
            );

            $content = $this->repository->getContentService()->loadContent($trashItem->contentId);
            $urlAliasNames = $this->nameSchemaService->resolveUrlAliasSchema($content);

            // Publish URL aliases for recovered location
            foreach ($urlAliasNames as $languageCode => $name) {
                $this->persistenceHandler->urlAliasHandler()->publishUrlAliasForLocation(
                    $newLocationId,
                    $newParentLocationId,
                    $name,
                    $languageCode,
                    $content->contentInfo->alwaysAvailable
                );
            }

            $this->repository->commit();
        } catch (Exception $e) {
            $this->repository->rollback();
            throw $e;
        }

        return $this->repository->getLocationService()->loadLocation($newLocationId);
    }

    /**
     * Empties trash.
     *
     * All locations contained in the trash will be removed. Content objects will be removed
     * if all locations of the content are gone.
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the user is not allowed to empty the trash
     */
    public function emptyTrash()
    {
        // Will throw if you have Role assignment limitation where you have content/cleantrash permission.
        // This is by design and means you can only delete one and one trash item, or you'll need to change how
        // permissions is assigned to be on separate role with no Role assignment limitation.
        if ($this->repository->hasAccess('content', 'cleantrash') !== true) {

            throw new UnauthorizedException('content', 'cleantrash');
        }

        $this->repository->beginTransaction();
        try {
            // Persistence layer takes care of deleting content objects
            $this->persistenceHandler->trashHandler()->emptyTrash();
            $this->repository->commit();
        } catch (Exception $e) {
            $this->repository->rollback();
            throw $e;
        }
    }

    /**
     * Deletes a trash item.
     *
     * The corresponding content object will be removed
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the user is not allowed to delete this trash item
     *
     * @param \eZ\Publish\API\Repository\Values\Content\TrashItem $trashItem
     */
    public function deleteTrashItem(APITrashItem $trashItem)
    {
        if (!$this->repository->canUser('content', 'cleantrash', $trashItem->getContentInfo())) {

            throw new UnauthorizedException('content', 'cleantrash');
        }

        if (!is_numeric($trashItem->id)) {
            throw new InvalidArgumentValue('id', $trashItem->id, 'TrashItem');
        }

        $this->repository->beginTransaction();
        try {
            $this->persistenceHandler->trashHandler()->deleteTrashItem($trashItem->id);
            $this->repository->commit();
        } catch (Exception $e) {
            $this->repository->rollback();
            throw $e;
        }
    }

    /**
     * Returns a collection of Trashed locations contained in the trash, which are readable by the current user.
     *
     * $query allows to filter/sort the elements to be contained in the collection.
     *
     * @param \eZ\Publish\API\Repository\Values\Content\Query $query
     *
     * @return \eZ\Publish\API\Repository\Values\Content\Trash\SearchResult
     */
    public function findTrashItems(Query $query)
    {
        if ($query->filter !== null && !$query->filter instanceof Criterion) {
            throw new InvalidArgumentValue('query->filter', $query->filter, 'Query');
        }

        if ($query->sortClauses !== null) {
            if (!is_array($query->sortClauses)) {
                throw new InvalidArgumentValue('query->sortClauses', $query->sortClauses, 'Query');
            }

            foreach ($query->sortClauses as $sortClause) {
                if (!$sortClause instanceof SortClause) {
                    throw new InvalidArgumentValue('query->sortClauses', 'only instances of SortClause class are allowed');
                }
            }
        }

        if ($query->offset !== null && !is_numeric($query->offset)) {

            throw new InvalidArgumentValue('query->offset', $query->offset, 'Query');
        }

        if ($query->limit !== null && !is_numeric($query->limit)) {

            throw new InvalidArgumentValue('query->limit', $query->limit, 'Query');
        }

        $spiTrashItems = $this->persistenceHandler->trashHandler()->findTrashItems(
            $query->filter,
            $query->offset !== null && $query->offset > 0 ? (int)$query->offset : 0,
            $query->limit !== null && $query->limit >= 1 ? (int)$query->limit : null,
            $query->sortClauses
        );

        $trashItems = $this->buildDomainTrashItems($spiTrashItems);
        $searchResult = new SearchResult();
        $searchResult->totalCount = $searchResult->count = count($trashItems);

        $searchResult->items = $trashItems;

        return $searchResult;
    }

    protected function buildDomainTrashItems(array $spiTrashItems): array
    {
        $trashItems = array();
        // TODO: load content in bulk once API allows for it
        foreach ($spiTrashItems as $spiTrashItem) {
            try {
                $trashItems[] = $this->buildDomainTrashItemObject(
                    $spiTrashItem,
                    $this->repository->getContentService()->loadContent($spiTrashItem->contentId)
                );
            } catch (APIUnauthorizedException $e) {
                // Do nothing, thus exclude items the current user doesn't have read access to.
            }
        }

        return $trashItems;
    }

    protected function buildDomainTrashItemObject(Trashed $spiTrashItem, Content $content): APITrashItem
    {
        return new TrashItem(
            array(
                'content' => $content,
                'contentInfo' => $content->contentInfo,
                'id' => $spiTrashItem->id,
                'priority' => $spiTrashItem->priority,
                'hidden' => $spiTrashItem->hidden,
                'invisible' => $spiTrashItem->invisible,
                'remoteId' => $spiTrashItem->remoteId,
                'parentLocationId' => $spiTrashItem->parentId,
                'pathString' => $spiTrashItem->pathString,
                'depth' => $spiTrashItem->depth,
                'sortField' => $spiTrashItem->sortField,
                'sortOrder' => $spiTrashItem->sortOrder,
            )
        );
    }

    /**
     * @param int $timestamp
     *
     * @return \DateTime
     */
    protected function getDateTime($timestamp)
    {
        $dateTime = new DateTime();
        $dateTime->setTimestamp($timestamp);

        return $dateTime;
    }
}


ezsystems / ezpublish-kernel