POData\ObjectModel\CynicDeserialiser

Complexity

Total Complexity

55

Size/Duplication

Total Lines	340
Duplicated Lines	3.24 %

Coupling/Cohesion

Components	1
Dependencies	14

Importance

Changes	4
Bugs	0	Features	0

11 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	6	1
A	processPayload()	0	11	2
C	isEntryOK()	0	39	11
A	getMetaProvider()	0	4	1
A	getWrapper()	0	4	1
A	getDeserialiser()	0	4	1
B	generateKeyDescriptor()	0	32	4
B	processLink()	0	24	6
B	processLinkSingleton()	0	57	8
C	processLinkFeed()	11	75	15
B	processEntryContent()	0	31	5

<?php

namespace POData\ObjectModel;

use POData\Providers\Metadata\IMetadataProvider;
use POData\Providers\Metadata\ResourceEntityType;
use POData\Providers\Metadata\ResourceSet;
use POData\Providers\Metadata\Type\IType;
use POData\Providers\ProvidersWrapper;
use POData\Providers\Query\IQueryProvider;
use POData\UriProcessor\ResourcePathProcessor\SegmentParser\KeyDescriptor;

class CynicDeserialiser
{
    /**
     * @var IMetadataProvider
     */
    private $metaProvider;

    /**
     * @var ProvidersWrapper
     */
    private $wrapper;

    /**
     * @var ModelDeserialiser
     */
    private $cereal;

    public function __construct(IMetadataProvider $meta, ProvidersWrapper $wrapper)
    {
        $this->metaProvider = $meta;
        $this->wrapper = $wrapper;
        $this->cereal = new ModelDeserialiser();
    }

    /**
     * @param ODataEntry $payload
     */
    public function processPayload(ODataEntry &$payload)
    {
        assert($this->isEntryOK($payload));
        list($sourceSet, $source) = $this->processEntryContent($payload);
        assert($sourceSet instanceof ResourceSet);
        $numLinks = count($payload->links);
        for ($i = 0; $i < $numLinks; $i++) {
            $this->processLink($payload->links[$i], $sourceSet, $source);
        }
        return $source;
    }

    protected function isEntryOK(ODataEntry $payload)
    {
        // check links
        foreach ($payload->links as $link) {
            $hasUrl = isset($link->url);
            $hasExpanded = isset($link->expandedResult);
            if ($hasUrl) {
                if (!is_string($link->url)) {
                    $msg = 'Url must be either string or null';
                    throw new \InvalidArgumentException($msg);
                }
            }
            if ($hasExpanded) {
                $isGood = $link->expandedResult instanceof ODataEntry || $link->expandedResult instanceof ODataFeed;
                if (!$isGood) {
                    $msg = 'Expanded result must null, or be instance of ODataEntry or ODataFeed';
                    throw new \InvalidArgumentException($msg);
                }
            }
            $isEntry = $link->expandedResult instanceof ODataEntry;

            if ($hasExpanded) {
                if ($isEntry) {
                    $this->isEntryOK($link->expandedResult);
                } else {
                    foreach ($link->expandedResult->entries as $expanded) {
                        $this->isEntryOK($expanded);
                    }
                }
            }
        }

        $set = $this->getMetaProvider()->resolveResourceSet($payload->resourceSetName);
        if (null === $set) {
            $msg = 'Specified resource set could not be resolved';
            throw new \InvalidArgumentException($msg);
        }
        return true;
    }

    protected function processEntryContent(ODataEntry &$content)
    {
        assert(null === $content->id || is_string($content->id), 'Entry id must be null or string');

        $isCreate = null === $content->id || empty($content->id);
        $set = $this->getMetaProvider()->resolveResourceSet($content->resourceSetName);
        assert($set instanceof ResourceSet, get_class($set));
        $type = $set->getResourceType();
        $properties = $this->getDeserialiser()->bulkDeserialise($type, $content);
        $properties = (object) $properties;

        if ($isCreate) {
            $result = $this->getWrapper()->createResourceforResourceSet($set, null, $properties);
            assert(isset($result), get_class($result));
            $key = $this->generateKeyDescriptor($type, $result);
            $keyProp = $key->getODataProperties();
            foreach ($keyProp as $keyName => $payload) {
                $content->propertyContent->properties[$keyName] = $payload;
            }
        } else {
            $key = $this->generateKeyDescriptor($type, $content->propertyContent, $content->id);
            assert($key instanceof KeyDescriptor, get_class($key));
            $source = $this->getWrapper()->getResourceFromResourceSet($set, $key);
            assert(isset($source), get_class($source));
            $result = $this->getWrapper()->updateResource($set, $source, $key, $properties);
        }

        assert($key instanceof KeyDescriptor, get_class($key));
        $content->id = $key;
        return [$set, $result];
    }

    /**
     * @return IMetadataProvider
     */
    protected function getMetaProvider()
    {
        return $this->metaProvider;
    }

    /**
     * @return ProvidersWrapper
     */
    protected function getWrapper()
    {
        return $this->wrapper;
    }

    /**
     * @return ModelDeserialiser
     */
    protected function getDeserialiser()
    {
        return $this->cereal;
    }

    /**
     * @param ResourceEntityType $type
     * @param ODataPropertyContent|object $result
     * @param string|null $id
     * @return null|KeyDescriptor
     */
    protected function generateKeyDescriptor(ResourceEntityType $type, $result, $id = null)
    {
        $isOData = $result instanceof ODataPropertyContent;
        $keyProp = $type->getKeyProperties();
        if (null === $id) {
            $keyPredicate = '';
            foreach ($keyProp as $prop) {
                $iType = $prop->getInstanceType();
                assert($iType instanceof IType, get_class($iType));
                $keyName = $prop->getName();
                $rawKey = $isOData ? $result->properties[$keyName]->value : $result->$keyName;
                $keyVal = $iType->convertToOData($rawKey);
                assert(isset($keyVal), 'Key property ' . $keyName . ' must not be null');
                $keyPredicate .= $keyName . '=' . $keyVal . ', ';
            }
            $keyPredicate[strlen($keyPredicate) - 2] = ' ';
        } else {
            $idBits = explode('/', $id);
            $keyRaw = $idBits[count($idBits)-1];
            $rawBits = explode('(', $keyRaw, 2);
            $rawBits = explode(')', $rawBits[count($rawBits)-1]);
            $keyPredicate = $rawBits[0];
        }
        $keyPredicate = trim($keyPredicate);
        $keyDesc = null;
        $isParsed = KeyDescriptor::tryParseKeysFromKeyPredicate($keyPredicate, $keyDesc);
        assert(true === $isParsed, 'Key descriptor not successfully parsed');
        $keyDesc->validate($keyPredicate, $type);
        // this is deliberate - ODataEntry/Feed has the structure we need for processing, and we're inserting
        // keyDescriptor objects in id fields to indicate the given record has been processed
        return $keyDesc;
    }

    protected function processLink(ODataLink &$link, ResourceSet $sourceSet, $source)
    {
        $hasUrl = isset($link->url);
        $hasPayload = isset($link->expandedResult);
        assert(
            null == $link->expandedResult
            || $link->expandedResult instanceof ODataEntry
            || $link->expandedResult instanceof ODataFeed,
            get_class($link->expandedResult)
        );
        $isFeed = $link->expandedResult instanceof ODataFeed;

        // if nothing to hook up, bail out now
        if (!$hasUrl && !$hasPayload) {
            return;
        }

        if ($isFeed) {
            $this->processLinkFeed($link, $sourceSet, $source, $hasUrl, $hasPayload);
        } else {
            $this->processLinkSingleton($link, $sourceSet, $source, $hasUrl, $hasPayload);
        }
        return;
    }

    /**
     * @param ODataLink $link
     * @param ResourceSet $sourceSet
     * @param $source
     * @param $hasUrl
     * @param $hasPayload
     */
    protected function processLinkSingleton(ODataLink &$link, ResourceSet $sourceSet, $source, $hasUrl, $hasPayload)
    {
        assert(
            null === $link->expandedResult || $link->expandedResult instanceof ODataEntry,
            get_class($link->expandedResult)
        );
        if ($hasUrl) {
            $urlBitz = explode('/', $link->url);
            $rawPredicate = $urlBitz[count($urlBitz) - 1];
            $rawPredicate = explode('(', $rawPredicate);
            $setName = $rawPredicate[0];
            $rawPredicate = trim($rawPredicate[count($rawPredicate) - 1], ')');
            $targSet = $this->getMetaProvider()->resolveResourceSet($setName);
            assert(null !== $targSet, get_class($targSet));
            $type = $targSet->getResourceType();
        } else {
            $type = $this->getMetaProvider()->resolveResourceType($link->expandedResult->type->term);
        }
        assert($type instanceof ResourceEntityType, get_class($type));
        $propName = $link->title;

        if ($hasUrl) {
            $keyDesc = null;
            assert(isset($rawPredicate));
            KeyDescriptor::tryParseKeysFromKeyPredicate($rawPredicate, $keyDesc);
            $keyDesc->validate($rawPredicate, $type);
            assert(null !== $keyDesc, 'Key description must not be null');
        }

        // hooking up to existing resource
        if ($hasUrl && !$hasPayload) {
            assert(isset($targSet));
            assert(isset($keyDesc));
            $target = $this->getWrapper()->getResourceFromResourceSet($targSet, $keyDesc);
            assert(isset($target));
            $this->getWrapper()->hookSingleModel($sourceSet, $source, $targSet, $target, $propName);
            $link->url = $keyDesc;
            return;
        }
        // creating new resource
        if (!$hasUrl && $hasPayload) {
            list($targSet, $target) = $this->processEntryContent($link->expandedResult);
            assert(isset($target));
            $key = $this->generateKeyDescriptor($type, $link->expandedResult->propertyContent);
            $link->url = $key;
            $link->expandedResult->id = $key;
            $this->getWrapper()->hookSingleModel($sourceSet, $source, $targSet, $target, $propName);
            return;
        }
        // updating existing resource and connecting to it
        list($targSet, $target) = $this->processEntryContent($link->expandedResult);
        assert(isset($target));
        $link->url = $keyDesc;
        $link->expandedResult->id = $keyDesc;
        $this->getWrapper()->hookSingleModel($sourceSet, $source, $targSet, $target, $propName);
        return;
    }

    protected function processLinkFeed(ODataLink &$link, ResourceSet $sourceSet, $source, $hasUrl, $hasPayload)
    {
        assert(
            $link->expandedResult instanceof ODataFeed,
            get_class($link->expandedResult)
        );
        $propName = $link->title;

        // if entries is empty, bail out - nothing to do
        $numEntries = count($link->expandedResult->entries);
        if (0 === $numEntries) {
            return;
        }
        // check that each entry is of consistent resource set
        $first = $link->expandedResult->entries[0]->resourceSetName;
        for ($i = 1; $i < $numEntries; $i++) {
            if ($first !== $link->expandedResult->entries[$i]->resourceSetName) {
                $msg = 'All entries in given feed must have same resource set';
                throw new \InvalidArgumentException($msg);
            }
        }

        $targSet = $this->getMetaProvider()->resolveResourceSet($first);
        assert($targSet instanceof ResourceSet);
        $targType = $targSet->getResourceType();
        assert($targType instanceof ResourceEntityType);
        $instanceType = $targType->getInstanceType();
        assert($instanceType instanceof \ReflectionClass);
        $targObj = $instanceType->newInstanceArgs();

        // assemble payload
        $data = [];
        $keys = [];
        for ($i = 0; $i < $numEntries; $i++) {
            $data[] = $this->getDeserialiser()->bulkDeserialise(
                $targType,
                $link->expandedResult->entries[$i]
            );
            $keys[] = $hasUrl ? $this->generateKeyDescriptor(
                $targType,
                $link->expandedResult->entries[$i]->propertyContent
            ) : null;
        }

        // creation
        if (!$hasUrl && $hasPayload) {
            $bulkResult = $this->getWrapper()->createBulkResourceforResourceSet($targSet, $data);
            assert(is_array($bulkResult));
            for ($i = 0; $i < $numEntries; $i++) {
                $targEntityInstance = $bulkResult[$i];
                $this->getWrapper()->hookSingleModel($sourceSet, $source, $targSet, $targEntityInstance, $propName);
                $key = $this->generateKeyDescriptor($targType, $targEntityInstance);
                $link->expandedResult->entries[$i]->id = $key;
            }
        }
        // update
        if ($hasUrl && $hasPayload) {
            $bulkResult = $this->getWrapper()->updateBulkResource($targSet, $targObj, $keys, $data);
            for ($i = 0; $i < $numEntries; $i++) {
                $targEntityInstance = $bulkResult[$i];
                $this->getWrapper()->hookSingleModel($sourceSet, $source, $targSet, $targEntityInstance, $propName);
                $link->expandedResult->entries[$i]->id = $keys[$i];
            }
        }
        assert(isset($bulkResult) && is_array($bulkResult));

        for ($i = 0; $i < $numEntries; $i++) {
            $numLinks = count($link->expandedResult->entries[$i]->links);
            for ($j = 0; $j < $numLinks; $j++) {
                $this->processLink($link->expandedResult->entries[$i]->links[$j], $targSet, $bulkResult[$i]);
            }
        }

        return;
    }
}