ContentService - Code Metrics - Inspection of "EZP-29899: Content loading can end up loading wron..." - ezsystems/ezpublish-kernel - Measure and Improve Code Quality continuously with Scrutinizer

Completed
Push — EZP-29899 ( ab51a2 )

by André
created 2018-12-14 15:05 UTC
ContentService F

↳ Parent: Project
Complexity

Total Complexity
228
Size/Duplication

Total Lines	1984
Duplicated Lines	9.38 %
Coupling/Cohesion

Components	1
Dependencies	57
Importance

Changes
Metric	Value
dl	186
loc	1984
rs	0.8
c	0
b	0
f	0
wmc	228
lcom	1
cbo	57
44 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	21	1
A	loadContentInfo()	9	9	2
A	internalLoadContentInfo()	0	16	3
A	loadContentInfoByRemoteId()	10	10	2
A	loadVersionInfo()	0	4	1
A	loadVersionInfoById()	0	36	5
A	loadContentByContentInfo()	0	14	3
A	loadContentByVersionInfo()	0	14	3
A	loadContent()	17	17	4
B	internalLoadContent()	0	48	9
A	loadContentByRemoteId()	17	17	4
B	loadContentListByContentInfo()	0	35	7
F	createContent()	19	198	28
A	getDefaultObjectStates()	0	15	3
A	getLanguageCodesForCreate()	0	24	5
B	mapFieldsForCreate()	6	33	6
A	cloneField()	0	14	1
B	buildSPILocationCreateStructs()	0	42	5
F	updateContentMetadata()	0	86	19
A	publishUrlAliasesForContent()	10	19	4
A	deleteContent()	0	26	4
B	createContentDraft()	0	62	9
A	loadContentDrafts()	8	25	5
A	translateVersion()	0	4	1
F	updateContent()	19	174	29
A	getUpdatedLanguageCodes()	16	16	4
A	getLanguageCodesForUpdate()	0	12	2
B	mapFieldsForUpdate()	6	38	7
A	publishVersion()	0	27	5
B	internalPublishVersion()	0	45	6
B	deleteVersion()	7	42	5
A	loadVersions()	8	20	4
B	copyContent()	10	51	5
A	loadRelations()	12	35	5
A	loadReverseRelations()	12	26	4
A	addRelation()	0	41	4
B	deleteRelation()	0	50	7
A	addTranslationInfo()	0	4	1
A	loadTranslationInfos()	0	4	1
A	newContentCreateStruct()	0	10	1
A	newContentMetadataUpdateStruct()	0	4	1
A	newContentUpdateStruct()	0	4	1
A	newTranslationInfo()	0	4	1
A	newTranslationValues()	0	4	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 ContentService 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 ContentService, and based on these observations, apply Extract Interface, too.
<?php

/**
 * File containing the eZ\Publish\Core\Repository\ContentService 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\ContentService as ContentServiceInterface;
use eZ\Publish\API\Repository\Repository as RepositoryInterface;
use eZ\Publish\API\Repository\Values\Content\Language;
use eZ\Publish\Core\Repository\Values\Content\Location;
use eZ\Publish\SPI\Persistence\Handler;
use eZ\Publish\API\Repository\Values\Content\ContentUpdateStruct as APIContentUpdateStruct;
use eZ\Publish\API\Repository\Values\ContentType\ContentType;
use eZ\Publish\API\Repository\Values\Content\TranslationInfo;
use eZ\Publish\API\Repository\Values\Content\TranslationValues as APITranslationValues;
use eZ\Publish\API\Repository\Values\Content\ContentCreateStruct as APIContentCreateStruct;
use eZ\Publish\API\Repository\Values\Content\ContentMetadataUpdateStruct;
use eZ\Publish\API\Repository\Values\Content\Content as APIContent;
use eZ\Publish\API\Repository\Values\Content\VersionInfo as APIVersionInfo;
use eZ\Publish\API\Repository\Values\Content\ContentInfo;
use eZ\Publish\API\Repository\Values\User\User;
use eZ\Publish\API\Repository\Values\Content\LocationCreateStruct;
use eZ\Publish\API\Repository\Values\Content\Field;
use eZ\Publish\API\Repository\Values\Content\Relation as APIRelation;
use eZ\Publish\API\Repository\Exceptions\NotFoundException as APINotFoundException;
use eZ\Publish\Core\Base\Exceptions\BadStateException;
use eZ\Publish\Core\Base\Exceptions\NotFoundException;
use eZ\Publish\Core\Base\Exceptions\InvalidArgumentException;
use eZ\Publish\Core\Base\Exceptions\ContentValidationException;
use eZ\Publish\Core\Base\Exceptions\ContentFieldValidationException;
use eZ\Publish\Core\Base\Exceptions\UnauthorizedException;
use eZ\Publish\Core\FieldType\ValidationError;
use eZ\Publish\Core\Repository\Values\Content\VersionInfo;
use eZ\Publish\Core\Repository\Values\Content\ContentCreateStruct;
use eZ\Publish\Core\Repository\Values\Content\ContentUpdateStruct;
use eZ\Publish\Core\Repository\Values\Content\TranslationValues;
use eZ\Publish\SPI\Persistence\Content\MetadataUpdateStruct as SPIMetadataUpdateStruct;
use eZ\Publish\SPI\Persistence\Content\CreateStruct as SPIContentCreateStruct;
use eZ\Publish\SPI\Persistence\Content\UpdateStruct as SPIContentUpdateStruct;
use eZ\Publish\SPI\Persistence\Content\Field as SPIField;
use eZ\Publish\SPI\Persistence\Content\Relation\CreateStruct as SPIRelationCreateStruct;
use Exception;
use eZ\Publish\API\Repository\Exceptions\NotImplementedException;

/**
 * This class provides service methods for managing content.
 *
 * @example Examples/content.php
 */
class ContentService implements ContentServiceInterface
{
    /**
     * @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\DomainMapper
     */
    protected $domainMapper;

    /**
     * @var \eZ\Publish\Core\Repository\Helper\RelationProcessor
     */
    protected $relationProcessor;

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

    /**
     * @var \eZ\Publish\Core\Repository\Helper\FieldTypeRegistry
     */
    protected $fieldTypeRegistry;

    /**
     * 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\DomainMapper $domainMapper
     * @param \eZ\Publish\Core\Repository\Helper\RelationProcessor $relationProcessor
     * @param \eZ\Publish\Core\Repository\Helper\NameSchemaService $nameSchemaService
     * @param \eZ\Publish\Core\Repository\Helper\FieldTypeRegistry $fieldTypeRegistry,
/**
 * @param array $germany
 * @param array $ireland
 */
function finale($germany, $island) {
    return "2:1";
}
     * @param array $settings
     */
    public function __construct(
        RepositoryInterface $repository,
        Handler $handler,
        Helper\DomainMapper $domainMapper,
        Helper\RelationProcessor $relationProcessor,
        Helper\NameSchemaService $nameSchemaService,
        Helper\FieldTypeRegistry $fieldTypeRegistry,
        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->domainMapper = $domainMapper;
        $this->relationProcessor = $relationProcessor;
        $this->nameSchemaService = $nameSchemaService;
        $this->fieldTypeRegistry = $fieldTypeRegistry;
        // Union makes sure default settings are ignored if provided in argument
        $this->settings = $settings + array(
            // Version archive limit (0-50), only enforced on publish, not on un-publish.
            'default_version_archive_limit' => 5,
        );
    }

    /**
     * Loads a content info object.
     *
     * To load fields use loadContent
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the user is not allowed to read the content
     * @throws \eZ\Publish\API\Repository\Exceptions\NotFoundException - if the content with the given id does not exist
     *
     * @param int $contentId
     *
     * @return \eZ\Publish\API\Repository\Values\Content\ContentInfo
     */
    public function loadContentInfo($contentId)
    {
        $contentInfo = $this->internalLoadContentInfo($contentId);
        if (!$this->repository->canUser('content', 'read', $contentInfo)) {

            throw new UnauthorizedException('content', 'read', array('contentId' => $contentId));
        }

        return $contentInfo;
    }

    /**
     * Loads a content info object.
     *
     * To load fields use loadContent
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\NotFoundException - if the content with the given id does not exist
     *
     * @param mixed $id
     * @param bool $isRemoteId
     *
     * @return \eZ\Publish\API\Repository\Values\Content\ContentInfo
     */
    public function internalLoadContentInfo($id, $isRemoteId = false)
    {
        try {
            $method = $isRemoteId ? 'loadContentInfoByRemoteId' : 'loadContentInfo';

            return $this->domainMapper->buildContentInfoDomainObject(
                $this->persistenceHandler->contentHandler()->$method($id)
            );
        } catch (APINotFoundException $e) {
            throw new NotFoundException(
                'Content',
                $id,
                $e
            );
        }
    }

    /**
     * Loads a content info object for the given remoteId.
     *
     * To load fields use loadContent
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the user is not allowed to read the content
     * @throws \eZ\Publish\API\Repository\Exceptions\NotFoundException - if the content with the given remote id does not exist
     *
     * @param string $remoteId
     *
     * @return \eZ\Publish\API\Repository\Values\Content\ContentInfo
     */
    public function loadContentInfoByRemoteId($remoteId)
    {
        $contentInfo = $this->internalLoadContentInfo($remoteId, true);

        if (!$this->repository->canUser('content', 'read', $contentInfo)) {

            throw new UnauthorizedException('content', 'read', array('remoteId' => $remoteId));
        }

        return $contentInfo;
    }

    /**
     * Loads a version info of the given content object.
     *
     * If no version number is given, the method returns the current version
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\NotFoundException - if the version with the given number does not exist
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the user is not allowed to load this version
     *
     * @param \eZ\Publish\API\Repository\Values\Content\ContentInfo $contentInfo
     * @param int $versionNo the version number. If not given the current version is returned.
     *
     * @return \eZ\Publish\API\Repository\Values\Content\VersionInfo
     */
    public function loadVersionInfo(ContentInfo $contentInfo, $versionNo = null)
    {
        return $this->loadVersionInfoById($contentInfo->id, $versionNo);
    }

    /**
     * Loads a version info of the given content object id.
     *
     * If no version number is given, the method returns the current version
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\NotFoundException - if the version with the given number does not exist
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the user is not allowed to load this version
     *
     * @param mixed $contentId
     * @param int $versionNo the version number. If not given the current version is returned.
     *
     * @return \eZ\Publish\API\Repository\Values\Content\VersionInfo
     */
    public function loadVersionInfoById($contentId, $versionNo = null)
    {
        if ($versionNo === null) {
            $versionNo = $this->loadContentInfo($contentId)->currentVersionNo;
        }

        try {
            $spiVersionInfo = $this->persistenceHandler->contentHandler()->loadVersionInfo(
                $contentId,
                $versionNo
            );
        } catch (APINotFoundException $e) {
            throw new NotFoundException(
                'VersionInfo',
                array(
                    'contentId' => $contentId,
                    'versionNo' => $versionNo,
                ),
                $e
            );
        }

        $versionInfo = $this->domainMapper->buildVersionInfoDomainObject($spiVersionInfo);

        if ($versionInfo->status === APIVersionInfo::STATUS_PUBLISHED) {
            $function = 'read';
        } else {
            $function = 'versionread';
        }

        if (!$this->repository->canUser('content', $function, $versionInfo)) {

            throw new UnauthorizedException('content', $function, array('contentId' => $contentId));
        }

        return $versionInfo;
    }

    /**
     * Loads content in a version for the given content info object.
     *
     * If no version number is given, the method returns the current version
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\NotFoundException - if version with the given number does not exist
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the user is not allowed to load this version
     *
     * @param \eZ\Publish\API\Repository\Values\Content\ContentInfo $contentInfo
     * @param array $languages A language filter for fields. If not given all languages are returned
     * @param int $versionNo the version number. If not given the current version is returned
     * @param bool $useAlwaysAvailable Add Main language to \$languages if true (default) and if alwaysAvailable is true
     *
     * @return \eZ\Publish\API\Repository\Values\Content\Content
     */
    public function loadContentByContentInfo(ContentInfo $contentInfo, array $languages = null, $versionNo = null, $useAlwaysAvailable = true)
    {
        // Change $useAlwaysAvailable to false to avoid contentInfo lookup if we know alwaysAvailable is disabled
        if ($useAlwaysAvailable && !$contentInfo->alwaysAvailable) {
            $useAlwaysAvailable = false;
        }

        return $this->loadContent(
            $contentInfo->id,
            $languages,
            $versionNo,
            $useAlwaysAvailable
        );
    }

    /**
     * Loads content in the version given by version info.
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the user is not allowed to load this version
     *
     * @param \eZ\Publish\API\Repository\Values\Content\VersionInfo $versionInfo
     * @param array $languages A language filter for fields. If not given all languages are returned
     * @param bool $useAlwaysAvailable Add Main language to \$languages if true (default) and if alwaysAvailable is true
     *
     * @return \eZ\Publish\API\Repository\Values\Content\Content
     */
    public function loadContentByVersionInfo(APIVersionInfo $versionInfo, array $languages = null, $useAlwaysAvailable = true)
    {
        // Change $useAlwaysAvailable to false to avoid contentInfo lookup if we know alwaysAvailable is disabled
        if ($useAlwaysAvailable && !$versionInfo->getContentInfo()->alwaysAvailable) {
            $useAlwaysAvailable = false;
        }

        return $this->loadContent(
            $versionInfo->getContentInfo()->id,
            $languages,
            $versionInfo->versionNo,
            $useAlwaysAvailable
        );
    }

    /**
     * Loads content in a version of the given content object.
     *
     * If no version number is given, the method returns the current version
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\NotFoundException if the content or version with the given id and languages does not exist
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException If the user has no access to read content and in case of un-published content: read versions
     *
     * @param int $contentId
     * @param array|null $languages A language filter for fields. If not given all languages are returned
     * @param int|null $versionNo the version number. If not given the current version is returned
     * @param bool $useAlwaysAvailable Add Main language to \$languages if true (default) and if alwaysAvailable is true
     *
     * @return \eZ\Publish\API\Repository\Values\Content\Content
     */
    public function loadContent($contentId, array $languages = null, $versionNo = null, $useAlwaysAvailable = true)
    {
        $content = $this->internalLoadContent($contentId, $languages, $versionNo, false, $useAlwaysAvailable);

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

            throw new UnauthorizedException('content', 'read', array('contentId' => $contentId));
        }

        if (
            $content->getVersionInfo()->status !== APIVersionInfo::STATUS_PUBLISHED
            && !$this->repository->canUser('content', 'versionread', $content)

        ) {
            throw new UnauthorizedException('content', 'versionread', array('contentId' => $contentId, 'versionNo' => $versionNo));
        }

        return $content;
    }

    /**
     * Loads content in a version of the given content object.
     *
     * If no version number is given, the method returns the current version
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\NotFoundException if the content or version with the given id and languages does not exist
     *
     * @param mixed $id
     * @param array|null $languages A language filter for fields. If not given all languages are returned
     * @param int|null $versionNo the version number. If not given the current version is returned
     * @param bool $isRemoteId
     * @param bool $useAlwaysAvailable Add Main language to \$languages if true (default) and if alwaysAvailable is true
     *
     * @return \eZ\Publish\API\Repository\Values\Content\Content
     */
    public function internalLoadContent($id, array $languages = null, $versionNo = null, $isRemoteId = false, $useAlwaysAvailable = true)
    {
        try {
            // Get Content ID if lookup by remote ID
            if ($isRemoteId) {
                $spiContentInfo = $this->persistenceHandler->contentHandler()->loadContentInfoByRemoteId($id);
                $id = $spiContentInfo->id;
            }

            $loadLanguages = $languages;
            $alwaysAvailableLanguageCode = null;
            // Set main language on $languages filter if not empty (all) and $useAlwaysAvailable being true
            // @todo Move use always available logic to SPI load methods, like done in location handler in 7.x
            if (!empty($loadLanguages) && $useAlwaysAvailable) {
                if (!isset($spiContentInfo)) {
                    $spiContentInfo = $this->persistenceHandler->contentHandler()->loadContentInfo($id);
                }

                if ($spiContentInfo->alwaysAvailable) {
                    $loadLanguages[] = $alwaysAvailableLanguageCode = $spiContentInfo->mainLanguageCode;
                    $loadLanguages = array_unique($loadLanguages);
                }
            }

            $spiContent = $this->persistenceHandler->contentHandler()->load(
                $id,
                $versionNo,
                $loadLanguages
/**
 * @return array|string
 */
function returnsDifferentValues($x) {
    if ($x) {
        return 'foo';
    }

    return array();
}

$x = returnsDifferentValues($y);
if (is_array($x)) {
    // $x is an array.
}
            );
        } catch (APINotFoundException $e) {
            throw new NotFoundException(
                'Content',
                array(
                    $isRemoteId ? 'remoteId' : 'id' => $id,
                    'languages' => $languages,
                    'versionNo' => $versionNo,
                ),
                $e
            );
        }

        return $this->domainMapper->buildContentDomainObject(
            $spiContent,
            null,
            empty($languages) ? null : $languages,
            $alwaysAvailableLanguageCode
        );
    }

    /**
     * Loads content in a version for the content object reference by the given remote id.
     *
     * If no version is given, the method returns the current version
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\NotFoundException - if the content or version with the given remote id does not exist
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException If the user has no access to read content and in case of un-published content: read versions
     *
     * @param string $remoteId
     * @param array $languages A language filter for fields. If not given all languages are returned
     * @param int $versionNo the version number. If not given the current version is returned
     * @param bool $useAlwaysAvailable Add Main language to \$languages if true (default) and if alwaysAvailable is true
     *
     * @return \eZ\Publish\API\Repository\Values\Content\Content
     */
    public function loadContentByRemoteId($remoteId, array $languages = null, $versionNo = null, $useAlwaysAvailable = true)
    {
        $content = $this->internalLoadContent($remoteId, $languages, $versionNo, true, $useAlwaysAvailable);

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

            throw new UnauthorizedException('content', 'read', array('remoteId' => $remoteId));
        }

        if (
            $content->getVersionInfo()->status !== APIVersionInfo::STATUS_PUBLISHED
            && !$this->repository->canUser('content', 'versionread', $content)

        ) {
            throw new UnauthorizedException('content', 'versionread', array('remoteId' => $remoteId, 'versionNo' => $versionNo));
        }

        return $content;
    }

    /**
     * Bulk-load Content items by the list of ContentInfo Value Objects.
     *
     * Note: it does not throw exceptions on load, just ignores erroneous Content item.
     * Moreover, since the method works on pre-loaded ContentInfo list, it is assumed that user is
     * allowed to access every Content on the list.
     *
     * @param \eZ\Publish\API\Repository\Values\Content\ContentInfo[] $contentInfoList
     * @param string[] $languages A language priority, filters returned fields and is used as prioritized language code on
     *                            returned value object. If not given all languages are returned.
     * @param bool $useAlwaysAvailable Add Main language to \$languages if true (default) and if alwaysAvailable is true,
     *                                 unless all languages have been asked for.
     *
     * @return \eZ\Publish\API\Repository\Values\Content\Content[] list of Content items with Content Ids as keys
     */
    public function loadContentListByContentInfo(
        array $contentInfoList,
        array $languages = [],
        $useAlwaysAvailable = true
    ) {
        $loadAllLanguages = $languages === Language::ALL;
        $contentIds = [];
        $translations = $languages;
        foreach ($contentInfoList as $contentInfo) {
            $contentIds[] = $contentInfo->id;
            // Unless we are told to load all languages, we add main language to translations so they are loaded too
            // Might in some case load more languages then intended, but prioritised handling will pick right one
            if (!$loadAllLanguages && $useAlwaysAvailable && $contentInfo->alwaysAvailable) {
                $translations[] = $contentInfo->mainLanguageCode;
            }
        }
        $translations = array_unique($translations);

        $spiContentList = $this->persistenceHandler->contentHandler()->loadContentList(
            $contentIds,
            $translations
        );
        $contentList = [];
        foreach ($spiContentList as $contentId => $spiContent) {
            $contentInfo = $spiContent->versionInfo->contentInfo;
            $contentList[$contentId] = $this->domainMapper->buildContentDomainObject(
                $spiContent,
                null,
                $languages,
                $contentInfo->alwaysAvailable ? $contentInfo->mainLanguageCode : null
            );
        }

        return $contentList;
    }

    /**
     * Creates a new content draft assigned to the authenticated user.
     *
     * If a different userId is given in $contentCreateStruct it is assigned to the given user
     * but this required special rights for the authenticated user
     * (this is useful for content staging where the transfer process does not
     * have to authenticate with the user which created the content object in the source server).
     * The user has to publish the draft if it should be visible.
     * In 4.x at least one location has to be provided in the location creation array.
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the user is not allowed to create the content in the given location
     * @throws \eZ\Publish\API\Repository\Exceptions\InvalidArgumentException if the provided remoteId exists in the system, required properties on
     *                                                                        struct are missing or invalid, or if multiple locations are under the
     *                                                                        same parent.
     * @throws \eZ\Publish\API\Repository\Exceptions\ContentFieldValidationException if a field in the $contentCreateStruct is not valid,
     *                                                                               or if a required field is missing / set to an empty value.
     * @throws \eZ\Publish\API\Repository\Exceptions\ContentValidationException If field definition does not exist in the ContentType,
     *                                                                          or value is set for non-translatable field in language
     *                                                                          other than main.
     *
     * @param \eZ\Publish\API\Repository\Values\Content\ContentCreateStruct $contentCreateStruct
     * @param \eZ\Publish\API\Repository\Values\Content\LocationCreateStruct[] $locationCreateStructs For each location parent under which a location should be created for the content
     *
     * @return \eZ\Publish\API\Repository\Values\Content\Content - the newly created content draft
     */
    public function createContent(APIContentCreateStruct $contentCreateStruct, array $locationCreateStructs = array())
    {
        if ($contentCreateStruct->mainLanguageCode === null) {
            throw new InvalidArgumentException('$contentCreateStruct', "'mainLanguageCode' property must be set");
        }

        if ($contentCreateStruct->contentType === null) {
            throw new InvalidArgumentException('$contentCreateStruct', "'contentType' property must be set");
        }

        $contentCreateStruct = clone $contentCreateStruct;

        if ($contentCreateStruct->ownerId === null) {
            $contentCreateStruct->ownerId = $this->repository->getCurrentUserReference()->getUserId();

        }

        if ($contentCreateStruct->alwaysAvailable === null) {
            $contentCreateStruct->alwaysAvailable = $contentCreateStruct->contentType->defaultAlwaysAvailable ?: false;
        }

        $contentCreateStruct->contentType = $this->repository->getContentTypeService()->loadContentType(
            $contentCreateStruct->contentType->id
        );

        if (empty($contentCreateStruct->sectionId)) {
            if (isset($locationCreateStructs[0])) {
                $location = $this->repository->getLocationService()->loadLocation(
                    $locationCreateStructs[0]->parentLocationId
                );
                $contentCreateStruct->sectionId = $location->contentInfo->sectionId;
            } else {
                $contentCreateStruct->sectionId = 1;
            }
        }

        if (!$this->repository->canUser('content', 'create', $contentCreateStruct, $locationCreateStructs)) {

            throw new UnauthorizedException(
                'content',
                'create',
                array(
                    'parentLocationId' => isset($locationCreateStructs[0]) ?
                            $locationCreateStructs[0]->parentLocationId :
                            null,
                    'sectionId' => $contentCreateStruct->sectionId,
                )
            );
        }

        if (!empty($contentCreateStruct->remoteId)) {
            try {
                $this->loadContentByRemoteId($contentCreateStruct->remoteId);

                throw new InvalidArgumentException(
                    '$contentCreateStruct',
                    "Another content with remoteId '{$contentCreateStruct->remoteId}' exists"
                );
            } catch (APINotFoundException $e) {
                // Do nothing
            }
        } else {
            $contentCreateStruct->remoteId = $this->domainMapper->getUniqueHash($contentCreateStruct);
        }

        $spiLocationCreateStructs = $this->buildSPILocationCreateStructs($locationCreateStructs);

        $languageCodes = $this->getLanguageCodesForCreate($contentCreateStruct);
        $fields = $this->mapFieldsForCreate($contentCreateStruct);

        $fieldValues = array();
        $spiFields = array();
        $allFieldErrors = array();
        $inputRelations = array();
        $locationIdToContentIdMapping = array();

        foreach ($contentCreateStruct->contentType->getFieldDefinitions() as $fieldDefinition) {
            /** @var $fieldType \eZ\Publish\Core\FieldType\FieldType */
            $fieldType = $this->fieldTypeRegistry->getFieldType(
                $fieldDefinition->fieldTypeIdentifier
            );

            foreach ($languageCodes as $languageCode) {
                $isEmptyValue = false;
                $valueLanguageCode = $fieldDefinition->isTranslatable ? $languageCode : $contentCreateStruct->mainLanguageCode;
                $isLanguageMain = $languageCode === $contentCreateStruct->mainLanguageCode;
                if (isset($fields[$fieldDefinition->identifier][$valueLanguageCode])) {
                    $fieldValue = $fields[$fieldDefinition->identifier][$valueLanguageCode]->value;
                } else {
                    $fieldValue = $fieldDefinition->defaultValue;
                }

                $fieldValue = $fieldType->acceptValue($fieldValue);

                if ($fieldType->isEmptyValue($fieldValue)) {

                    $isEmptyValue = true;
                    if ($fieldDefinition->isRequired) {
                        $allFieldErrors[$fieldDefinition->id][$languageCode] = new ValidationError(
                            "Value for required field definition '%identifier%' with language '%languageCode%' is empty",
                            null,
                            ['%identifier%' => $fieldDefinition->identifier, '%languageCode%' => $languageCode],
                            'empty'
                        );
                    }
                } else {
                    $fieldErrors = $fieldType->validate(
                        $fieldDefinition,
                        $fieldValue
                    );
                    if (!empty($fieldErrors)) {
                        $allFieldErrors[$fieldDefinition->id][$languageCode] = $fieldErrors;
                    }
                }

                if (!empty($allFieldErrors)) {
                    continue;
                }

                $this->relationProcessor->appendFieldRelations(
                    $inputRelations,
                    $locationIdToContentIdMapping,
                    $fieldType,
                    $fieldValue,
                    $fieldDefinition->id
                );
                $fieldValues[$fieldDefinition->identifier][$languageCode] = $fieldValue;

                // Only non-empty value for: translatable field or in main language
                if (
                    (!$isEmptyValue && $fieldDefinition->isTranslatable) ||
                    (!$isEmptyValue && $isLanguageMain)
                ) {
                    $spiFields[] = new SPIField(
                        array(
                            'id' => null,
                            'fieldDefinitionId' => $fieldDefinition->id,
                            'type' => $fieldDefinition->fieldTypeIdentifier,
                            'value' => $fieldType->toPersistenceValue($fieldValue),
                            'languageCode' => $languageCode,
                            'versionNo' => null,
                        )
                    );
                }
            }
        }

        if (!empty($allFieldErrors)) {
            throw new ContentFieldValidationException($allFieldErrors);
        }

        $spiContentCreateStruct = new SPIContentCreateStruct(
            array(
                'name' => $this->nameSchemaService->resolve(
                    $contentCreateStruct->contentType->nameSchema,
                    $contentCreateStruct->contentType,
                    $fieldValues,
                    $languageCodes
                ),
                'typeId' => $contentCreateStruct->contentType->id,
                'sectionId' => $contentCreateStruct->sectionId,
                'ownerId' => $contentCreateStruct->ownerId,
                'locations' => $spiLocationCreateStructs,
                'fields' => $spiFields,
                'alwaysAvailable' => $contentCreateStruct->alwaysAvailable,
                'remoteId' => $contentCreateStruct->remoteId,
                'modified' => isset($contentCreateStruct->modificationDate) ? $contentCreateStruct->modificationDate->getTimestamp() : time(),
                'initialLanguageId' => $this->persistenceHandler->contentLanguageHandler()->loadByLanguageCode(
                    $contentCreateStruct->mainLanguageCode
                )->id,
            )
        );

        $defaultObjectStates = $this->getDefaultObjectStates();

        $this->repository->beginTransaction();
        try {
            $spiContent = $this->persistenceHandler->contentHandler()->create($spiContentCreateStruct);
            $this->relationProcessor->processFieldRelations(
                $inputRelations,
                $spiContent->versionInfo->contentInfo->id,
                $spiContent->versionInfo->versionNo,
                $contentCreateStruct->contentType
            );

            foreach ($defaultObjectStates as $objectStateGroupId => $objectState) {
                $this->persistenceHandler->objectStateHandler()->setContentState(
                    $spiContent->versionInfo->contentInfo->id,
                    $objectStateGroupId,
                    $objectState->id
                );
            }

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

        return $this->domainMapper->buildContentDomainObject($spiContent);
    }

    /**
     * Returns an array of default content states with content state group id as key.
     *
     * @return \eZ\Publish\SPI\Persistence\Content\ObjectState[]
     */
    protected function getDefaultObjectStates()
    {
        $defaultObjectStatesMap = array();
        $objectStateHandler = $this->persistenceHandler->objectStateHandler();

        foreach ($objectStateHandler->loadAllGroups() as $objectStateGroup) {
            foreach ($objectStateHandler->loadObjectStates($objectStateGroup->id) as $objectState) {
                // Only register the first object state which is the default one.
                $defaultObjectStatesMap[$objectStateGroup->id] = $objectState;
                break;
            }
        }

        return $defaultObjectStatesMap;
    }

    /**
     * Returns all language codes used in given $fields.
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\ContentValidationException if no field value is set in main language
     *
     * @param \eZ\Publish\API\Repository\Values\Content\ContentCreateStruct $contentCreateStruct
     *
     * @return string[]
     */
    protected function getLanguageCodesForCreate(APIContentCreateStruct $contentCreateStruct)
    {
        $languageCodes = array();

        foreach ($contentCreateStruct->fields as $field) {
            if ($field->languageCode === null || isset($languageCodes[$field->languageCode])) {
                continue;
            }

            $this->persistenceHandler->contentLanguageHandler()->loadByLanguageCode(
                $field->languageCode
            );
            $languageCodes[$field->languageCode] = true;
        }

        if (!isset($languageCodes[$contentCreateStruct->mainLanguageCode])) {
            $this->persistenceHandler->contentLanguageHandler()->loadByLanguageCode(
                $contentCreateStruct->mainLanguageCode
            );
            $languageCodes[$contentCreateStruct->mainLanguageCode] = true;
        }

        return array_keys($languageCodes);
    }

    /**
     * Returns an array of fields like $fields[$field->fieldDefIdentifier][$field->languageCode].
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\ContentValidationException If field definition does not exist in the ContentType
     *                                                                          or value is set for non-translatable field in language
     *                                                                          other than main
     *
     * @param \eZ\Publish\API\Repository\Values\Content\ContentCreateStruct $contentCreateStruct
     *
     * @return array
     */
    protected function mapFieldsForCreate(APIContentCreateStruct $contentCreateStruct)
    {
        $fields = array();

        foreach ($contentCreateStruct->fields as $field) {
            $fieldDefinition = $contentCreateStruct->contentType->getFieldDefinition($field->fieldDefIdentifier);

            if ($fieldDefinition === null) {
                throw new ContentValidationException(
                    "Field definition '%identifier%' does not exist in given ContentType",
                    ['%identifier%' => $field->fieldDefIdentifier]
                );
            }

            if ($field->languageCode === null) {
                $field = $this->cloneField(
                    $field,
                    array('languageCode' => $contentCreateStruct->mainLanguageCode)
                );
            }

            if (!$fieldDefinition->isTranslatable && ($field->languageCode != $contentCreateStruct->mainLanguageCode)) {

                throw new ContentValidationException(
                    "A value is set for non translatable field definition '%identifier%' with language '%languageCode%'",
                    ['%identifier%' => $field->fieldDefIdentifier, '%languageCode%' => $field->languageCode]
                );
            }

            $fields[$field->fieldDefIdentifier][$field->languageCode] = $field;
        }

        return $fields;
    }

    /**
     * Clones $field with overriding specific properties from given $overrides array.
     *
     * @param Field $field
     * @param array $overrides
     *
     * @return Field
     */
    private function cloneField(Field $field, array $overrides = array())
    {
        $fieldData = array_merge(
            array(
                'id' => $field->id,
                'value' => $field->value,
                'languageCode' => $field->languageCode,
                'fieldDefIdentifier' => $field->fieldDefIdentifier,
            ),
            $overrides
        );

        return new Field($fieldData);
    }

    /**
     * @throws \eZ\Publish\API\Repository\Exceptions\InvalidArgumentException
     *
     * @param \eZ\Publish\API\Repository\Values\Content\LocationCreateStruct[] $locationCreateStructs
     *
     * @return \eZ\Publish\SPI\Persistence\Content\Location\CreateStruct[]
     */
    protected function buildSPILocationCreateStructs(array $locationCreateStructs)
    {
        $spiLocationCreateStructs = array();
        $parentLocationIdSet = array();
        $mainLocation = true;

        foreach ($locationCreateStructs as $locationCreateStruct) {
            if (isset($parentLocationIdSet[$locationCreateStruct->parentLocationId])) {
                throw new InvalidArgumentException(
                    '$locationCreateStructs',
                    "Multiple LocationCreateStructs with the same parent Location '{$locationCreateStruct->parentLocationId}' are given"
                );
            }

            if (!array_key_exists($locationCreateStruct->sortField, Location::SORT_FIELD_MAP)) {
                $locationCreateStruct->sortField = Location::SORT_FIELD_NAME;
            }

            if (!array_key_exists($locationCreateStruct->sortOrder, Location::SORT_ORDER_MAP)) {
                $locationCreateStruct->sortOrder = Location::SORT_ORDER_ASC;
            }

            $parentLocationIdSet[$locationCreateStruct->parentLocationId] = true;
            $parentLocation = $this->repository->getLocationService()->loadLocation(
                $locationCreateStruct->parentLocationId
            );

            $spiLocationCreateStructs[] = $this->domainMapper->buildSPILocationCreateStruct(
                $locationCreateStruct,
                $parentLocation,
                $mainLocation,
                // For Content draft contentId and contentVersionNo are set in ContentHandler upon draft creation
                null,
                null
            );

            // First Location in the list will be created as main Location
            $mainLocation = false;
        }

        return $spiLocationCreateStructs;
    }

    /**
     * Updates the metadata.
     *
     * (see {@link ContentMetadataUpdateStruct}) of a content object - to update fields use updateContent
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the user is not allowed to update the content meta data
     * @throws \eZ\Publish\API\Repository\Exceptions\InvalidArgumentException if the remoteId in $contentMetadataUpdateStruct is set but already exists
     *
     * @param \eZ\Publish\API\Repository\Values\Content\ContentInfo $contentInfo
     * @param \eZ\Publish\API\Repository\Values\Content\ContentMetadataUpdateStruct $contentMetadataUpdateStruct
     *
     * @return \eZ\Publish\API\Repository\Values\Content\Content the content with the updated attributes
     */
    public function updateContentMetadata(ContentInfo $contentInfo, ContentMetadataUpdateStruct $contentMetadataUpdateStruct)
    {
        $propertyCount = 0;
        foreach ($contentMetadataUpdateStruct as $propertyName => $propertyValue) {

            if (isset($contentMetadataUpdateStruct->$propertyName)) {
                $propertyCount += 1;
            }
        }
        if ($propertyCount === 0) {
            throw new InvalidArgumentException(
                '$contentMetadataUpdateStruct',
                'At least one property must be set'
            );
        }

        $loadedContentInfo = $this->loadContentInfo($contentInfo->id);

        if (!$this->repository->canUser('content', 'edit', $loadedContentInfo)) {

            throw new UnauthorizedException('content', 'edit', array('contentId' => $loadedContentInfo->id));
        }

        if (isset($contentMetadataUpdateStruct->remoteId)) {
            try {
                $existingContentInfo = $this->loadContentInfoByRemoteId($contentMetadataUpdateStruct->remoteId);

                if ($existingContentInfo->id !== $loadedContentInfo->id) {
                    throw new InvalidArgumentException(
                        '$contentMetadataUpdateStruct',
                        "Another content with remoteId '{$contentMetadataUpdateStruct->remoteId}' exists"
                    );
                }
            } catch (APINotFoundException $e) {
                // Do nothing
            }
        }

        $this->repository->beginTransaction();
        try {
            if ($propertyCount > 1 || !isset($contentMetadataUpdateStruct->mainLocationId)) {
                $this->persistenceHandler->contentHandler()->updateMetadata(
                    $loadedContentInfo->id,
                    new SPIMetadataUpdateStruct(
                        array(
                            'ownerId' => $contentMetadataUpdateStruct->ownerId,
                            'publicationDate' => isset($contentMetadataUpdateStruct->publishedDate) ?
                                $contentMetadataUpdateStruct->publishedDate->getTimestamp() :
                                null,
                            'modificationDate' => isset($contentMetadataUpdateStruct->modificationDate) ?
                                $contentMetadataUpdateStruct->modificationDate->getTimestamp() :
                                null,
                            'mainLanguageId' => isset($contentMetadataUpdateStruct->mainLanguageCode) ?
                                $this->repository->getContentLanguageService()->loadLanguage(
                                    $contentMetadataUpdateStruct->mainLanguageCode
                                )->id :
                                null,
                            'alwaysAvailable' => $contentMetadataUpdateStruct->alwaysAvailable,
                            'remoteId' => $contentMetadataUpdateStruct->remoteId,
                        )
                    )
                );
            }

            // Change main location
            if (isset($contentMetadataUpdateStruct->mainLocationId)
                && $loadedContentInfo->mainLocationId !== $contentMetadataUpdateStruct->mainLocationId) {
                $this->persistenceHandler->locationHandler()->changeMainLocation(
                    $loadedContentInfo->id,
                    $contentMetadataUpdateStruct->mainLocationId
                );
            }

            // Republish URL aliases to update always-available flag
            if (isset($contentMetadataUpdateStruct->alwaysAvailable)
                && $loadedContentInfo->alwaysAvailable !== $contentMetadataUpdateStruct->alwaysAvailable) {
                $content = $this->loadContent($loadedContentInfo->id);
                $this->publishUrlAliasesForContent($content, false);
            }

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

        return isset($content) ? $content : $this->loadContent($loadedContentInfo->id);
    }

    /**
     * Publishes URL aliases for all locations of a given content.
     *
     * @param \eZ\Publish\API\Repository\Values\Content\Content $content
     * @param bool $updatePathIdentificationString this parameter is legacy storage specific for updating
     *                      ezcontentobject_tree.path_identification_string, it is ignored by other storage engines
     */
    protected function publishUrlAliasesForContent(APIContent $content, $updatePathIdentificationString = true)
    {
        $urlAliasNames = $this->nameSchemaService->resolveUrlAliasSchema($content);
        $locations = $this->repository->getLocationService()->loadLocations(
            $content->getVersionInfo()->getContentInfo()
        );
        foreach ($locations as $location) {
            foreach ($urlAliasNames as $languageCode => $name) {

                $this->persistenceHandler->urlAliasHandler()->publishUrlAliasForLocation(
                    $location->id,
                    $location->parentLocationId,
                    $name,
                    $languageCode,
                    $content->contentInfo->alwaysAvailable,
                    $updatePathIdentificationString ? $languageCode === $content->contentInfo->mainLanguageCode : false
                );
            }
        }
    }

    /**
     * Deletes a content object including all its versions and locations including their subtrees.
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the user is not allowed to delete the content (in one of the locations of the given content object)
     *
     * @param \eZ\Publish\API\Repository\Values\Content\ContentInfo $contentInfo
     *
     * @return mixed[] Affected Location Id's
     */
    public function deleteContent(ContentInfo $contentInfo)
    {
        $contentInfo = $this->internalLoadContentInfo($contentInfo->id);

        if (!$this->repository->canUser('content', 'remove', $contentInfo)) {

            throw new UnauthorizedException('content', 'remove', array('contentId' => $contentInfo->id));
        }

        $affectedLocations = [];
        $this->repository->beginTransaction();
        try {
            // Load Locations first as deleting Content also deletes belonging Locations
            $spiLocations = $this->persistenceHandler->locationHandler()->loadLocationsByContent($contentInfo->id);
            $this->persistenceHandler->contentHandler()->deleteContent($contentInfo->id);
            foreach ($spiLocations as $spiLocation) {
                $this->persistenceHandler->urlAliasHandler()->locationDeleted($spiLocation->id);
                $affectedLocations[] = $spiLocation->id;
            }
            $this->repository->commit();
        } catch (Exception $e) {
            $this->repository->rollback();
            throw $e;
        }

        return $affectedLocations;
    }

    /**
     * Creates a draft from a published or archived version.
     *
     * If no version is given, the current published version is used.
     * 4.x: The draft is created with the initialLanguage code of the source version or if not present with the main language.
     * It can be changed on updating the version.
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the current-user is not allowed to create the draft
     *
     * @param \eZ\Publish\API\Repository\Values\Content\ContentInfo $contentInfo
     * @param \eZ\Publish\API\Repository\Values\Content\VersionInfo $versionInfo
     * @param \eZ\Publish\API\Repository\Values\User\User $creator if set given user is used to create the draft - otherwise the current-user is used
     *
     * @return \eZ\Publish\API\Repository\Values\Content\Content - the newly created content draft
     */
    public function createContentDraft(ContentInfo $contentInfo, APIVersionInfo $versionInfo = null, User $creator = null)
    {
        $contentInfo = $this->loadContentInfo($contentInfo->id);

        if ($versionInfo !== null) {
            // Check that given $contentInfo and $versionInfo belong to the same content
            if ($versionInfo->getContentInfo()->id != $contentInfo->id) {
                throw new InvalidArgumentException(
                    '$versionInfo',
                    'VersionInfo does not belong to the same content as given ContentInfo'
                );
            }

            $versionInfo = $this->loadVersionInfoById($contentInfo->id, $versionInfo->versionNo);

            switch ($versionInfo->status) {
                case VersionInfo::STATUS_PUBLISHED:
                case VersionInfo::STATUS_ARCHIVED:
                    break;

                default:
                    // @todo: throw an exception here, to be defined
                    throw new BadStateException(
                        '$versionInfo',
                        'Draft can not be created from a draft version'
                    );
            }

            $versionNo = $versionInfo->versionNo;
        } elseif ($contentInfo->published) {
            $versionNo = $contentInfo->currentVersionNo;
        } else {
            // @todo: throw an exception here, to be defined
            throw new BadStateException(
                '$contentInfo',
                'Content is not published, draft can be created only from published or archived version'
            );
        }

        if ($creator === null) {
            $creator = $this->repository->getCurrentUserReference();

        }

        if (!$this->repository->canUser('content', 'edit', $contentInfo)) {

            throw new UnauthorizedException('content', 'edit', array('contentId' => $contentInfo->id));
        }

        $this->repository->beginTransaction();
        try {
            $spiContent = $this->persistenceHandler->contentHandler()->createDraftFromVersion(
                $contentInfo->id,
                $versionNo,
                $creator->getUserId()
            );
            $this->repository->commit();
        } catch (Exception $e) {
            $this->repository->rollback();
            throw $e;
        }

        return $this->domainMapper->buildContentDomainObject($spiContent);
    }

    /**
     * Loads drafts for a user.
     *
     * If no user is given the drafts for the authenticated user a returned
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the current-user is not allowed to load the draft list
     *
     * @param \eZ\Publish\API\Repository\Values\User\UserReference $user
     *
     * @return \eZ\Publish\API\Repository\Values\Content\VersionInfo the drafts ({@link VersionInfo}) owned by the given user
     */
    public function loadContentDrafts(User $user = null)
    {
        if ($user === null) {
            $user = $this->repository->getCurrentUserReference();

        }

        // throw early if user has absolutely no access to versionread
        if ($this->repository->hasAccess('content', 'versionread') === false) {

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

        $spiVersionInfoList = $this->persistenceHandler->contentHandler()->loadDraftsForUser($user->getUserId());
        $versionInfoList = array();
        foreach ($spiVersionInfoList as $spiVersionInfo) {

            $versionInfo = $this->domainMapper->buildVersionInfoDomainObject($spiVersionInfo);
            // @todo: Change this to filter returned drafts by permissions instead of throwing
            if (!$this->repository->canUser('content', 'versionread', $versionInfo)) {

                throw new UnauthorizedException('content', 'versionread', array('contentId' => $versionInfo->contentInfo->id));
            }

            $versionInfoList[] = $versionInfo;
        }

        return $versionInfoList;
    }

    /**
     * Translate a version.
     *
     * updates the destination version given in $translationInfo with the provided translated fields in $translationValues
     *
     * @example Examples/translation_5x.php
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the current-user is not allowed to update this version
     * @throws \eZ\Publish\API\Repository\Exceptions\BadStateException if the given destination version is not a draft
     * @throws \eZ\Publish\API\Repository\Exceptions\ContentFieldValidationException if a field in the $translationValues is not valid, or if a required field is missing or is set to an empty value.
     * @throws \eZ\Publish\API\Repository\Exceptions\ContentValidationException If field definition does not exist in the ContentType
     *                                                                          or value is set for non-translatable field in language
     *                                                                          other than main.
     *
     * @param \eZ\Publish\API\Repository\Values\Content\TranslationInfo $translationInfo
     * @param \eZ\Publish\API\Repository\Values\Content\TranslationValues $translationValues
     * @param \eZ\Publish\API\Repository\Values\User\User $modifier If set, this user is taken as modifier of the version
     *
     * @return \eZ\Publish\API\Repository\Values\Content\Content the content draft with the translated fields
     *
     * @since 5.0
     */
    public function translateVersion(TranslationInfo $translationInfo, APITranslationValues $translationValues, User $modifier = null)
    {
        throw new NotImplementedException(__METHOD__);
    }

    /**
     * Updates the fields of a draft.
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the user is not allowed to update this version
     * @throws \eZ\Publish\API\Repository\Exceptions\BadStateException if the version is not a draft
     * @throws \eZ\Publish\API\Repository\Exceptions\InvalidArgumentException if a property on the struct is invalid.
     * @throws \eZ\Publish\API\Repository\Exceptions\ContentFieldValidationException if a field in the $contentCreateStruct is not valid,
     *                                                                               or if a required field is missing / set to an empty value.
     * @throws \eZ\Publish\API\Repository\Exceptions\ContentValidationException If field definition does not exist in the ContentType,
     *                                                                          or value is set for non-translatable field in language
     *                                                                          other than main.
     *
     * @param \eZ\Publish\API\Repository\Values\Content\VersionInfo $versionInfo
     * @param \eZ\Publish\API\Repository\Values\Content\ContentUpdateStruct $contentUpdateStruct
     *
     * @return \eZ\Publish\API\Repository\Values\Content\Content the content draft with the updated fields
     */
    public function updateContent(APIVersionInfo $versionInfo, APIContentUpdateStruct $contentUpdateStruct)
    {
        $contentUpdateStruct = clone $contentUpdateStruct;

        /** @var $content \eZ\Publish\Core\Repository\Values\Content\Content */
        $content = $this->loadContent(
            $versionInfo->getContentInfo()->id,
            null,
            $versionInfo->versionNo
        );
        if ($content->versionInfo->status !== APIVersionInfo::STATUS_DRAFT) {
            throw new BadStateException(
                '$versionInfo',
                'Version is not a draft and can not be updated'
            );
        }

        if (!$this->repository->canUser('content', 'edit', $content)) {

            throw new UnauthorizedException('content', 'edit', array('contentId' => $content->id));
        }

        $mainLanguageCode = $content->contentInfo->mainLanguageCode;
        if ($contentUpdateStruct->initialLanguageCode === null) {
            $contentUpdateStruct->initialLanguageCode = $mainLanguageCode;
        }

        $allLanguageCodes = $this->getLanguageCodesForUpdate($contentUpdateStruct, $content);
        foreach ($allLanguageCodes as $languageCode) {
            $this->persistenceHandler->contentLanguageHandler()->loadByLanguageCode($languageCode);
        }

        $updatedLanguageCodes = $this->getUpdatedLanguageCodes($contentUpdateStruct);
        $contentType = $this->repository->getContentTypeService()->loadContentType(
            $content->contentInfo->contentTypeId
        );
        $fields = $this->mapFieldsForUpdate(
            $contentUpdateStruct,
            $contentType,
            $mainLanguageCode
        );

        $fieldValues = array();
        $spiFields = array();
        $allFieldErrors = array();
        $inputRelations = array();
        $locationIdToContentIdMapping = array();

        foreach ($contentType->getFieldDefinitions() as $fieldDefinition) {
            /** @var $fieldType \eZ\Publish\SPI\FieldType\FieldType */
            $fieldType = $this->fieldTypeRegistry->getFieldType(
                $fieldDefinition->fieldTypeIdentifier
            );

            foreach ($allLanguageCodes as $languageCode) {
                $isCopied = $isEmpty = $isRetained = false;
                $isLanguageNew = !in_array($languageCode, $content->versionInfo->languageCodes);
                $isLanguageUpdated = in_array($languageCode, $updatedLanguageCodes);
                $valueLanguageCode = $fieldDefinition->isTranslatable ? $languageCode : $mainLanguageCode;
                $isFieldUpdated = isset($fields[$fieldDefinition->identifier][$valueLanguageCode]);
                $isProcessed = isset($fieldValues[$fieldDefinition->identifier][$valueLanguageCode]);

                if (!$isFieldUpdated && !$isLanguageNew) {
                    $isRetained = true;
                    $fieldValue = $content->getField($fieldDefinition->identifier, $valueLanguageCode)->value;
                } elseif (!$isFieldUpdated && $isLanguageNew && !$fieldDefinition->isTranslatable) {
                    $isCopied = true;
                    $fieldValue = $content->getField($fieldDefinition->identifier, $valueLanguageCode)->value;
                } elseif ($isFieldUpdated) {
                    $fieldValue = $fields[$fieldDefinition->identifier][$valueLanguageCode]->value;
                } else {
                    $fieldValue = $fieldDefinition->defaultValue;
                }

                $fieldValue = $fieldType->acceptValue($fieldValue);

                if ($fieldType->isEmptyValue($fieldValue)) {

                    $isEmpty = true;
                    if ($isLanguageUpdated && $fieldDefinition->isRequired) {
                        $allFieldErrors[$fieldDefinition->id][$languageCode] = new ValidationError(
                            "Value for required field definition '%identifier%' with language '%languageCode%' is empty",
                            null,
                            ['%identifier%' => $fieldDefinition->identifier, '%languageCode%' => $languageCode],
                            'empty'
                        );
                    }
                } elseif ($isLanguageUpdated) {
                    $fieldErrors = $fieldType->validate(
                        $fieldDefinition,
                        $fieldValue
                    );
                    if (!empty($fieldErrors)) {
                        $allFieldErrors[$fieldDefinition->id][$languageCode] = $fieldErrors;
                    }
                }

                if (!empty($allFieldErrors)) {
                    continue;
                }

                $this->relationProcessor->appendFieldRelations(
                    $inputRelations,
                    $locationIdToContentIdMapping,
                    $fieldType,
                    $fieldValue,

                    $fieldDefinition->id
                );
                $fieldValues[$fieldDefinition->identifier][$languageCode] = $fieldValue;

                if ($isRetained || $isCopied || ($isLanguageNew && $isEmpty) || $isProcessed) {
                    continue;
                }

                $spiFields[] = new SPIField(
                    array(
                        'id' => $isLanguageNew ?
                            null :
                            $content->getField($fieldDefinition->identifier, $languageCode)->id,
                        'fieldDefinitionId' => $fieldDefinition->id,
                        'type' => $fieldDefinition->fieldTypeIdentifier,
                        'value' => $fieldType->toPersistenceValue($fieldValue),
                        'languageCode' => $languageCode,
                        'versionNo' => $versionInfo->versionNo,
                    )
                );
            }
        }

        if (!empty($allFieldErrors)) {
            throw new ContentFieldValidationException($allFieldErrors);
        }

        $spiContentUpdateStruct = new SPIContentUpdateStruct(
            array(
                'name' => $this->nameSchemaService->resolveNameSchema(
                    $content,
                    $fieldValues,
                    $allLanguageCodes,
                    $contentType
                ),
                'creatorId' => $contentUpdateStruct->creatorId ?: $this->repository->getCurrentUserReference()->getUserId(),

                'fields' => $spiFields,
                'modificationDate' => time(),
                'initialLanguageId' => $this->persistenceHandler->contentLanguageHandler()->loadByLanguageCode(
                    $contentUpdateStruct->initialLanguageCode
                )->id,
            )
        );
        $existingRelations = $this->loadRelations($versionInfo);

        $this->repository->beginTransaction();
        try {
            $spiContent = $this->persistenceHandler->contentHandler()->updateContent(
                $versionInfo->getContentInfo()->id,
                $versionInfo->versionNo,
                $spiContentUpdateStruct
            );
            $this->relationProcessor->processFieldRelations(
                $inputRelations,
                $spiContent->versionInfo->contentInfo->id,
                $spiContent->versionInfo->versionNo,
                $contentType,
                $existingRelations
            );
            $this->repository->commit();
        } catch (Exception $e) {
            $this->repository->rollback();
            throw $e;
        }

        return $this->domainMapper->buildContentDomainObject(
            $spiContent,
            $contentType
        );
    }

    /**
     * Returns only updated language codes.
     *
     * @param \eZ\Publish\API\Repository\Values\Content\ContentUpdateStruct $contentUpdateStruct
     *
     * @return array
     */
    private function getUpdatedLanguageCodes(APIContentUpdateStruct $contentUpdateStruct)
    {
        $languageCodes = [
            $contentUpdateStruct->initialLanguageCode => true,
        ];

        foreach ($contentUpdateStruct->fields as $field) {
            if ($field->languageCode === null || isset($languageCodes[$field->languageCode])) {
                continue;
            }

            $languageCodes[$field->languageCode] = true;
        }

        return array_keys($languageCodes);
    }

    /**
     * Returns all language codes used in given $fields.
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\ContentValidationException if no field value exists in initial language
     *
     * @param \eZ\Publish\API\Repository\Values\Content\ContentUpdateStruct $contentUpdateStruct
     * @param \eZ\Publish\API\Repository\Values\Content\Content $content
     *
     * @return array
     */
    protected function getLanguageCodesForUpdate(APIContentUpdateStruct $contentUpdateStruct, APIContent $content)
    {
        $languageCodes = array_fill_keys($content->versionInfo->languageCodes, true);
        $languageCodes[$contentUpdateStruct->initialLanguageCode] = true;

        $updatedLanguageCodes = $this->getUpdatedLanguageCodes($contentUpdateStruct);
        foreach ($updatedLanguageCodes as $languageCode) {
            $languageCodes[$languageCode] = true;
        }

        return array_keys($languageCodes);
    }

    /**
     * Returns an array of fields like $fields[$field->fieldDefIdentifier][$field->languageCode].
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\ContentValidationException If field definition does not exist in the ContentType
     *                                                                          or value is set for non-translatable field in language
     *                                                                          other than main
     *
     * @param \eZ\Publish\API\Repository\Values\Content\ContentUpdateStruct $contentUpdateStruct
     * @param \eZ\Publish\API\Repository\Values\ContentType\ContentType $contentType
     * @param string $mainLanguageCode
     *
     * @return array
     */
    protected function mapFieldsForUpdate(
        APIContentUpdateStruct $contentUpdateStruct,
        ContentType $contentType,
        $mainLanguageCode
    ) {
        $fields = array();

        foreach ($contentUpdateStruct->fields as $field) {
            $fieldDefinition = $contentType->getFieldDefinition($field->fieldDefIdentifier);

            if ($fieldDefinition === null) {
                throw new ContentValidationException(
                    "Field definition '%identifier%' does not exist in given ContentType",
                    ['%identifier%' => $field->fieldDefIdentifier]
                );
            }

            if ($field->languageCode === null) {
                if ($fieldDefinition->isTranslatable) {
                    $languageCode = $contentUpdateStruct->initialLanguageCode;
                } else {
                    $languageCode = $mainLanguageCode;
                }
                $field = $this->cloneField($field, array('languageCode' => $languageCode));
            }

            if (!$fieldDefinition->isTranslatable && ($field->languageCode != $mainLanguageCode)) {

                throw new ContentValidationException(
                    "A value is set for non translatable field definition '%identifier%' with language '%languageCode%'",
                    ['%identifier%' => $field->fieldDefIdentifier, '%languageCode%' => $field->languageCode]
                );
            }

            $fields[$field->fieldDefIdentifier][$field->languageCode] = $field;
        }

        return $fields;
    }

    /**
     * Publishes a content version.
     *
     * Publishes a content version and deletes archive versions if they overflow max archive versions.
     * Max archive versions are currently a configuration, but might be moved to be a param of ContentType in the future.
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the user is not allowed to publish this version
     * @throws \eZ\Publish\API\Repository\Exceptions\BadStateException if the version is not a draft
     *
     * @param \eZ\Publish\API\Repository\Values\Content\VersionInfo $versionInfo
     *
     * @return \eZ\Publish\API\Repository\Values\Content\Content
     */
    public function publishVersion(APIVersionInfo $versionInfo)
    {
        $content = $this->internalLoadContent(
            $versionInfo->contentInfo->id,
            null,
            $versionInfo->versionNo
        );

        if (!$content->getVersionInfo()->getContentInfo()->published) {
            if (!$this->repository->canUser('content', 'create', $content)) {

                throw new UnauthorizedException('content', 'create', array('contentId' => $content->id));
            }
        } elseif (!$this->repository->canUser('content', 'edit', $content)) {

            throw new UnauthorizedException('content', 'edit', array('contentId' => $content->id));
        }

        $this->repository->beginTransaction();
        try {
            $content = $this->internalPublishVersion($content->getVersionInfo());
            $this->repository->commit();
        } catch (Exception $e) {
            $this->repository->rollback();
            throw $e;
        }

        return $content;
    }

    /**
     * Publishes a content version.
     *
     * Publishes a content version and deletes archive versions if they overflow max archive versions.
     * Max archive versions are currently a configuration, but might be moved to be a param of ContentType in the future.
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\BadStateException if the version is not a draft
     *
     * @param \eZ\Publish\API\Repository\Values\Content\VersionInfo $versionInfo
     * @param int|null $publicationDate If null existing date is kept if there is one, otherwise current time is used.
     *
     * @return \eZ\Publish\API\Repository\Values\Content\Content
     */
    protected function internalPublishVersion(APIVersionInfo $versionInfo, $publicationDate = null)
    {
        if ($versionInfo->status !== APIVersionInfo::STATUS_DRAFT) {
            throw new BadStateException('$versionInfo', 'Only versions in draft status can be published.');
        }

        $currentTime = time();
        if ($publicationDate === null && $versionInfo->versionNo === 1) {
            $publicationDate = $currentTime;
        }

        $metadataUpdateStruct = new SPIMetadataUpdateStruct();
        $metadataUpdateStruct->publicationDate = $publicationDate;
        $metadataUpdateStruct->modificationDate = $currentTime;

        $contentId = $versionInfo->getContentInfo()->id;
        $spiContent = $this->persistenceHandler->contentHandler()->publish(
            $contentId,
            $versionInfo->versionNo,
            $metadataUpdateStruct
        );

        $content = $this->domainMapper->buildContentDomainObject($spiContent);

        $this->publishUrlAliasesForContent($content);

        // Delete version archive overflow if any, limit is 0-50 (however 0 will mean 1 if content is unpublished)
        $archiveList = $this->persistenceHandler->contentHandler()->listVersions(
            $contentId,
            APIVersionInfo::STATUS_ARCHIVED,
            100 // Limited to avoid publishing taking to long, besides SE limitations this is why limit is max 50
        );

        $maxVersionArchiveCount = max(0, min(50, $this->settings['default_version_archive_limit']));
        while (!empty($archiveList) && count($archiveList) > $maxVersionArchiveCount) {
            /** @var \eZ\Publish\SPI\Persistence\Content\VersionInfo $archiveVersion */
            $archiveVersion = array_shift($archiveList);
            $this->persistenceHandler->contentHandler()->deleteVersion(
                $contentId,
                $archiveVersion->versionNo
            );
        }

        return $content;
    }

    /**
     * Removes the given version.
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\BadStateException if the version is in
     *         published state or is the last version of the Content
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the user is not allowed to remove this version
     *
     * @param \eZ\Publish\API\Repository\Values\Content\VersionInfo $versionInfo
     */
    public function deleteVersion(APIVersionInfo $versionInfo)
    {
        if ($versionInfo->status === APIVersionInfo::STATUS_PUBLISHED) {
            throw new BadStateException(
                '$versionInfo',
                'Version is published and can not be removed'
            );
        }

        if (!$this->repository->canUser('content', 'versionremove', $versionInfo)) {

            throw new UnauthorizedException(
                'content',
                'versionremove',
                array('contentId' => $versionInfo->contentInfo->id, 'versionNo' => $versionInfo->versionNo)
            );
        }

        $versionList = $this->persistenceHandler->contentHandler()->listVersions(
            $versionInfo->contentInfo->id,
            null,
            2
        );

        if (count($versionList) === 1) {
            throw new BadStateException(
                '$versionInfo',
                'Version is the last version of the Content and can not be removed'
            );
        }

        $this->repository->beginTransaction();
        try {
            $this->persistenceHandler->contentHandler()->deleteVersion(
                $versionInfo->getContentInfo()->id,
                $versionInfo->versionNo
            );
            $this->repository->commit();
        } catch (Exception $e) {
            $this->repository->rollback();
            throw $e;
        }
    }

    /**
     * Loads all versions for the given content.
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the user is not allowed to list versions
     *
     * @param \eZ\Publish\API\Repository\Values\Content\ContentInfo $contentInfo
     *
     * @return \eZ\Publish\API\Repository\Values\Content\VersionInfo[] Sorted by creation date
     */
    public function loadVersions(ContentInfo $contentInfo)
    {
        if (!$this->repository->canUser('content', 'versionread', $contentInfo)) {

            throw new UnauthorizedException('content', 'versionread', array('contentId' => $contentInfo->id));
        }

        $spiVersionInfoList = $this->persistenceHandler->contentHandler()->listVersions($contentInfo->id);

        $versions = array();
        foreach ($spiVersionInfoList as $spiVersionInfo) {

            $versionInfo = $this->domainMapper->buildVersionInfoDomainObject($spiVersionInfo);
            if (!$this->repository->canUser('content', 'versionread', $versionInfo)) {

                throw new UnauthorizedException('content', 'versionread', array('versionId' => $versionInfo->id));
            }

            $versions[] = $versionInfo;
        }

        return $versions;
    }

    /**
     * Copies the content to a new location. If no version is given,
     * all versions are copied, otherwise only the given version.
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the user is not allowed to copy the content to the given location
     *
     * @param \eZ\Publish\API\Repository\Values\Content\ContentInfo $contentInfo
     * @param \eZ\Publish\API\Repository\Values\Content\LocationCreateStruct $destinationLocationCreateStruct the target location where the content is copied to
     * @param \eZ\Publish\API\Repository\Values\Content\VersionInfo $versionInfo
     *
     * @return \eZ\Publish\API\Repository\Values\Content\Content
     */
    public function copyContent(ContentInfo $contentInfo, LocationCreateStruct $destinationLocationCreateStruct, APIVersionInfo $versionInfo = null)
    {
        $destinationLocation = $this->repository->getLocationService()->loadLocation(
            $destinationLocationCreateStruct->parentLocationId
        );
        if (!$this->repository->canUser('content', 'create', $contentInfo, [$destinationLocation])) {

            throw new UnauthorizedException(
                'content',
                'create',
                [
                    'parentLocationId' => $destinationLocationCreateStruct->parentLocationId,
                    'sectionId' => $contentInfo->sectionId,
                ]
            );
        }

        $defaultObjectStates = $this->getDefaultObjectStates();

        $this->repository->beginTransaction();
        try {
            $spiContent = $this->persistenceHandler->contentHandler()->copy(
                $contentInfo->id,
                $versionInfo ? $versionInfo->versionNo : null,
                $this->repository->getPermissionResolver()->getCurrentUserReference()->getUserId()
            );

            foreach ($defaultObjectStates as $objectStateGroupId => $objectState) {
                $this->persistenceHandler->objectStateHandler()->setContentState(
                    $spiContent->versionInfo->contentInfo->id,
                    $objectStateGroupId,
                    $objectState->id
                );
            }

            $content = $this->internalPublishVersion(
                $this->domainMapper->buildVersionInfoDomainObject($spiContent->versionInfo),
                $spiContent->versionInfo->creationDate
            );

            $this->repository->getLocationService()->createLocation(
                $content->getVersionInfo()->getContentInfo(),
                $destinationLocationCreateStruct
            );
            $this->repository->commit();
        } catch (Exception $e) {
            $this->repository->rollback();
            throw $e;
        }

        return $this->internalLoadContent($content->id);
    }

    /**
     * Loads all outgoing relations for the given version.
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the user is not allowed to read this version
     *
     * @param \eZ\Publish\API\Repository\Values\Content\VersionInfo $versionInfo
     *
     * @return \eZ\Publish\API\Repository\Values\Content\Relation[]
     */
    public function loadRelations(APIVersionInfo $versionInfo)
    {
        if ($versionInfo->status === APIVersionInfo::STATUS_PUBLISHED) {
            $function = 'read';
        } else {
            $function = 'versionread';
        }

        if (!$this->repository->canUser('content', $function, $versionInfo)) {

            throw new UnauthorizedException('content', $function);
        }

        $contentInfo = $versionInfo->getContentInfo();
        $spiRelations = $this->persistenceHandler->contentHandler()->loadRelations(
            $contentInfo->id,
            $versionInfo->versionNo
        );

        /** @var $relations \eZ\Publish\API\Repository\Values\Content\Relation[] */
        $relations = array();
        foreach ($spiRelations as $spiRelation) {

            $destinationContentInfo = $this->internalLoadContentInfo($spiRelation->destinationContentId);
            if (!$this->repository->canUser('content', 'read', $destinationContentInfo)) {

                continue;
            }

            $relations[] = $this->domainMapper->buildRelationDomainObject(
                $spiRelation,
                $contentInfo,
                $destinationContentInfo
            );
        }

        return $relations;
    }

    /**
     * Loads all incoming relations for a content object.
     *
     * The relations come only from published versions of the source content objects
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the user is not allowed to read this version
     *
     * @param \eZ\Publish\API\Repository\Values\Content\ContentInfo $contentInfo
     *
     * @return \eZ\Publish\API\Repository\Values\Content\Relation[]
     */
    public function loadReverseRelations(ContentInfo $contentInfo)
    {
        if (!$this->repository->canUser('content', 'reverserelatedlist', $contentInfo)) {

            throw new UnauthorizedException('content', 'reverserelatedlist', array('contentId' => $contentInfo->id));
        }

        $spiRelations = $this->persistenceHandler->contentHandler()->loadReverseRelations(
            $contentInfo->id
        );

        $returnArray = array();
        foreach ($spiRelations as $spiRelation) {

            $sourceContentInfo = $this->internalLoadContentInfo($spiRelation->sourceContentId);
            if (!$this->repository->canUser('content', 'read', $sourceContentInfo)) {

                continue;
            }

            $returnArray[] = $this->domainMapper->buildRelationDomainObject(
                $spiRelation,
                $sourceContentInfo,
                $contentInfo
            );
        }

        return $returnArray;
    }

    /**
     * Adds a relation of type common.
     *
     * The source of the relation is the content and version
     * referenced by $versionInfo.
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the user is not allowed to edit this version
     * @throws \eZ\Publish\API\Repository\Exceptions\BadStateException if the version is not a draft
     *
     * @param \eZ\Publish\API\Repository\Values\Content\VersionInfo $sourceVersion
     * @param \eZ\Publish\API\Repository\Values\Content\ContentInfo $destinationContent the destination of the relation
     *
     * @return \eZ\Publish\API\Repository\Values\Content\Relation the newly created relation
     */
    public function addRelation(APIVersionInfo $sourceVersion, ContentInfo $destinationContent)
    {
        $sourceVersion = $this->loadVersionInfoById(
            $sourceVersion->contentInfo->id,
            $sourceVersion->versionNo
        );

        if ($sourceVersion->status !== APIVersionInfo::STATUS_DRAFT) {
            throw new BadStateException(
                '$sourceVersion',
                'Relations of type common can only be added to versions of status draft'
            );
        }

        if (!$this->repository->canUser('content', 'edit', $sourceVersion)) {

            throw new UnauthorizedException('content', 'edit', array('contentId' => $sourceVersion->contentInfo->id));
        }

        $sourceContentInfo = $sourceVersion->getContentInfo();

        $this->repository->beginTransaction();
        try {
            $spiRelation = $this->persistenceHandler->contentHandler()->addRelation(
                new SPIRelationCreateStruct(
                    array(
                        'sourceContentId' => $sourceContentInfo->id,
                        'sourceContentVersionNo' => $sourceVersion->versionNo,
                        'sourceFieldDefinitionId' => null,
                        'destinationContentId' => $destinationContent->id,
                        'type' => APIRelation::COMMON,
                    )
                )
            );
            $this->repository->commit();
        } catch (Exception $e) {
            $this->repository->rollback();
            throw $e;
        }

        return $this->domainMapper->buildRelationDomainObject($spiRelation, $sourceContentInfo, $destinationContent);
    }

    /**
     * Removes a relation of type COMMON from a draft.
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the user is not allowed edit this version
     * @throws \eZ\Publish\API\Repository\Exceptions\BadStateException if the version is not a draft
     * @throws \eZ\Publish\API\Repository\Exceptions\InvalidArgumentException if there is no relation of type COMMON for the given destination
     *
     * @param \eZ\Publish\API\Repository\Values\Content\VersionInfo $sourceVersion
     * @param \eZ\Publish\API\Repository\Values\Content\ContentInfo $destinationContent
     */
    public function deleteRelation(APIVersionInfo $sourceVersion, ContentInfo $destinationContent)
    {
        $sourceVersion = $this->loadVersionInfoById(
            $sourceVersion->contentInfo->id,
            $sourceVersion->versionNo
        );

        if ($sourceVersion->status !== APIVersionInfo::STATUS_DRAFT) {
            throw new BadStateException(
                '$sourceVersion',
                'Relations of type common can only be removed from versions of status draft'
            );
        }

        if (!$this->repository->canUser('content', 'edit', $sourceVersion)) {

            throw new UnauthorizedException('content', 'edit', array('contentId' => $sourceVersion->contentInfo->id));
        }

        $spiRelations = $this->persistenceHandler->contentHandler()->loadRelations(
            $sourceVersion->getContentInfo()->id,
            $sourceVersion->versionNo,
            APIRelation::COMMON
        );

        if (empty($spiRelations)) {
            throw new InvalidArgumentException(
                '$sourceVersion',
                'There are no relations of type COMMON for the given destination'
            );
        }

        // there should be only one relation of type COMMON for each destination,
        // but in case there were ever more then one, we will remove them all
        // @todo: alternatively, throw BadStateException?
        $this->repository->beginTransaction();
        try {
            foreach ($spiRelations as $spiRelation) {
                if ($spiRelation->destinationContentId == $destinationContent->id) {
                    $this->persistenceHandler->contentHandler()->removeRelation(
                        $spiRelation->id,
                        APIRelation::COMMON
                    );
                }
            }
            $this->repository->commit();
        } catch (Exception $e) {
            $this->repository->rollback();
            throw $e;
        }
    }

    /**
     * Adds translation information to the content object.
     *
     * @example Examples/translation_5x.php
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the user is not allowed add a translation info
     *
     * @param \eZ\Publish\API\Repository\Values\Content\TranslationInfo $translationInfo
     *
     * @since 5.0
     */
    public function addTranslationInfo(TranslationInfo $translationInfo)
    {
        throw new NotImplementedException(__METHOD__);
    }

    /**
     * lists the translations done on this content object.
     *
     * @throws \eZ\Publish\API\Repository\Exceptions\UnauthorizedException if the user is not allowed read translation infos
     *
     * @param \eZ\Publish\API\Repository\Values\Content\ContentInfo $contentInfo
     * @param array $filter
     *
     * @todo TBD - filter by source version destination version and languages
     *
     * @return \eZ\Publish\API\Repository\Values\Content\TranslationInfo[]
     *
     * @since 5.0
     */
    public function loadTranslationInfos(ContentInfo $contentInfo, array $filter = array())
    {
        throw new NotImplementedException(__METHOD__);
    }

    /**
     * Instantiates a new content create struct object.
     *
     * alwaysAvailable is set to the ContentType's defaultAlwaysAvailable
     *
     * @param \eZ\Publish\API\Repository\Values\ContentType\ContentType $contentType
     * @param string $mainLanguageCode
     *
     * @return \eZ\Publish\API\Repository\Values\Content\ContentCreateStruct
     */
    public function newContentCreateStruct(ContentType $contentType, $mainLanguageCode)
    {
        return new ContentCreateStruct(
            array(
                'contentType' => $contentType,
                'mainLanguageCode' => $mainLanguageCode,
                'alwaysAvailable' => $contentType->defaultAlwaysAvailable,
            )
        );
    }

    /**
     * Instantiates a new content meta data update struct.
     *
     * @return \eZ\Publish\API\Repository\Values\Content\ContentMetadataUpdateStruct
     */
    public function newContentMetadataUpdateStruct()
    {
        return new ContentMetadataUpdateStruct();
    }

    /**
     * Instantiates a new content update struct.
     *
     * @return \eZ\Publish\API\Repository\Values\Content\ContentUpdateStruct
     */
    public function newContentUpdateStruct()
    {
        return new ContentUpdateStruct();
    }

    /**
     * Instantiates a new TranslationInfo object.
     *
     * @return \eZ\Publish\API\Repository\Values\Content\TranslationInfo
     */
    public function newTranslationInfo()
    {
        return new TranslationInfo();
    }

    /**
     * Instantiates a Translation object.
     *
     * @return \eZ\Publish\API\Repository\Values\Content\TranslationValues
     */
    public function newTranslationValues()
    {
        return new TranslationValues();
    }
}

ezsystems / ezpublish-kernel
