MetadataProvider::attachReferencePolymorphic() - Code Metrics - Inspection of "Relax multi-level polymorph chain prohibition" - Algo-Web/POData-Laravel - Measure and Improve Code Quality continuously with Scrutinizer

Test Failed

Pull Request — master (#108)

by Alex

created 2017-09-05 10:39 UTC

MetadataProvider::attachReferencePolymorphic() D

↳ Parent: MetadataProvider

Complexity

Conditions	9
Paths	36

Size

Total Lines	41
Code Lines	33

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	0
CRAP Score	90

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
c	1
b	0
f	0
dl	0
loc	41
ccs	0
cts	0
cp	0
rs	4.909
cc	9
eloc	33
nc	36
nop	9
crap	90

How to fix Many Parameters

<?php

namespace AlgoWeb\PODataLaravel\Providers;

use AlgoWeb\PODataLaravel\Models\MetadataRelationHolder;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Facades\App;
use Illuminate\Support\ServiceProvider;
use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Str;
use POData\Providers\Metadata\IMetadataProvider;
use POData\Providers\Metadata\ResourceEntityType;
use POData\Providers\Metadata\ResourceSet;
use POData\Providers\Metadata\ResourceType;
use POData\Providers\Metadata\SimpleMetadataProvider;
use Illuminate\Support\Facades\Route;
use Illuminate\Support\Facades\Schema as Schema;
use POData\Providers\Metadata\Type\TypeCode;

class MetadataProvider extends MetadataBaseProvider
{
    protected $multConstraints = [ '0..1' => ['1'], '1' => ['0..1', '*'], '*' => ['1', '*']];
    protected static $metaNAMESPACE = 'Data';
    protected static $relationCache;
    protected static $isBooted = false;
    const POLYMORPHIC = 'polyMorphicPlaceholder';
    const POLYMORPHIC_PLURAL = 'polyMorphicPlaceholders';

    protected $relationHolder;

    public function __construct($app)
    {
        parent::__construct($app);
        $this->relationHolder = new MetadataRelationHolder();
        self::$isBooted = false;
    }

    /**
     * Bootstrap the application services.  Post-boot.
     *
     * @return void
     */
    public function boot()
    {
        self::$metaNAMESPACE = env('ODataMetaNamespace', 'Data');
        // If we aren't migrated, there's no DB tables to pull metadata _from_, so bail out early
        try {
            if (!Schema::hasTable(config('database.migrations'))) {
                return;
            }
        } catch (\Exception $e) {
            return;
        }

        assert(false === self::$isBooted, 'Provider booted twice');
        $isCaching = true === $this->getIsCaching();
        $meta = Cache::get('metadata');
        $hasCache = null != $meta;

        if ($isCaching && $hasCache) {
            App::instance('metadata', $meta);
            return;
        }
        $meta = App::make('metadata');
        $this->reset();

        $stdRef = new \ReflectionClass(Model::class);
        $abstract = $meta->addEntityType($stdRef, static::POLYMORPHIC, true, null);
        $meta->addKeyProperty($abstract, 'PrimaryKey', TypeCode::STRING);

        $meta->addResourceSet(static::POLYMORPHIC, $abstract);

        $modelNames = $this->getCandidateModels();

        list($entityTypes) = $this->getEntityTypesAndResourceSets($meta, $modelNames);
        $entityTypes[static::POLYMORPHIC] = $abstract;

        // need to lift EntityTypes, adjust for polymorphic-affected relations, etc
        $biDirect = $this->getRepairedRoundTripRelations();

        // now that endpoints are hooked up, tackle the relationships
        // if we'd tried earlier, we'd be guaranteed to try to hook a relation up to null, which would be bad
        foreach ($biDirect as $line) {
            $this->processRelationLine($line, $entityTypes, $meta);
        }

        $key = 'metadata';
        $this->handlePostBoot($isCaching, $hasCache, $key, $meta);
        self::$isBooted = true;
    }

    /**
     * Register the application services.  Boot-time only.
     *
     * @return void
     */
    public function register()
    {
        $this->app->singleton('metadata', function ($app) {

            return new SimpleMetadataProvider('Data', self::$metaNAMESPACE);
        });
    }

    /**
     * @return array
     */
    protected function getCandidateModels()
    {
        $classes = $this->getClassMap();
        $ends = [];
        $startName = defined('PODATA_LARAVEL_APP_ROOT_NAMESPACE') ? PODATA_LARAVEL_APP_ROOT_NAMESPACE : 'App';
        foreach ($classes as $name) {
            if (\Illuminate\Support\Str::startsWith($name, $startName)) {
                if (in_array('AlgoWeb\\PODataLaravel\\Models\\MetadataTrait', class_uses($name))) {
                    $ends[] = $name;
                }
            }
        }
        return $ends;
    }

    /**
     * @param $meta
     * @param $ends
     * @return array[]
     */
    protected function getEntityTypesAndResourceSets($meta, $ends)
    {
        assert($meta instanceof IMetadataProvider, get_class($meta));
        $entityTypes = [];
        $resourceSets = [];
        $begins = [];
        $numEnds = count($ends);

        for ($i = 0; $i < $numEnds; $i++) {
            $bitter = $ends[$i];
            $fqModelName = $bitter;

            $instance = App::make($fqModelName);
            $name = strtolower($instance->getEndpointName());
            $metaSchema = $instance->getXmlSchema();

            // if for whatever reason we don't get an XML schema, move on to next entry and drop current one from
            // further processing
            if (null == $metaSchema) {
                continue;
            }
            $entityTypes[$fqModelName] = $metaSchema;
            $resourceSets[$fqModelName] = $meta->addResourceSet($name, $metaSchema);
            $begins[] = $bitter;
        }

        return [$entityTypes, $resourceSets, $begins];
    }

    /**
     * @return MetadataRelationHolder
     */
    public function getRelationHolder()
    {
        return $this->relationHolder;
    }

    public function calculateRoundTripRelations()
    {
        $modelNames = $this->getCandidateModels();

        foreach ($modelNames as $name) {
            if (!$this->getRelationHolder()->hasClass($name)) {
                $model = new $name();
                $this->getRelationHolder()->addModel($model);
            }
        }

        return $this->getRelationHolder()->getRelations();
    }

    public function getPolymorphicRelationGroups()
    {
        $modelNames = $this->getCandidateModels();

        $knownSide = [];
        $unknownSide = [];

        $hooks = [];
        // fish out list of polymorphic-affected models for further processing
        foreach ($modelNames as $name) {
            $model = new $name();
            $isPoly = false;
            if ($model->isKnownPolymorphSide()) {
                $knownSide[$name] = [];
                $isPoly = true;
            }
            if ($model->isUnknownPolymorphSide()) {
                $unknownSide[$name] = [];
                $isPoly = true;
            }
            if (false === $isPoly) {
                continue;
            }

            $rels = $model->getRelationships();
            // it doesn't matter if a model has no relationships here, that lack will simply be skipped over
            // during hookup processing
            $hooks[$name] = $rels;
        }
        // ensure we've only loaded up polymorphic-affected models
        $knownKeys = array_keys($knownSide);
        $unknownKeys = array_keys($unknownSide);
        $dualKeys = array_intersect($knownKeys, $unknownKeys);
        assert(count($hooks) == (count($unknownKeys) + count($knownKeys) - count($dualKeys)));
        // if either list is empty, bail out - there's nothing to do
        if (0 === count($knownSide) || 0 === count($unknownSide)) {
            return [];
        }

        // commence primary ignition

        foreach ($unknownKeys as $key) {
            assert(isset($hooks[$key]));
            $hook = $hooks[$key];
            foreach ($hook as $barb) {
                foreach ($barb as $knownType => $propData) {
                    $propName = array_keys($propData)[0];
                    if (in_array($knownType, $knownKeys)) {
                        if (!isset($knownSide[$knownType][$key])) {
                            $knownSide[$knownType][$key] = [];
                        }
                        assert(isset($knownSide[$knownType][$key]));
                        $knownSide[$knownType][$key][] = $propData[$propName]['property'];
                    }
                }
            }
        }

        return $knownSide;
    }

    /**
     * Get round-trip relations after inserting polymorphic-powered placeholders
     *
     * @return array
     */
    public function getRepairedRoundTripRelations()
    {
        if (!isset(self::$relationCache)) {
            $rels = $this->calculateRoundTripRelations();
            $groups = $this->getPolymorphicRelationGroups();

            if (0 === count($groups)) {
                self::$relationCache = $rels;
                return $rels;
            }

            $placeholder = static::POLYMORPHIC;

            $groupKeys = array_keys($groups);

            // we have at least one polymorphic relation, need to dig it out
            $numRels = count($rels);
            for ($i = 0; $i < $numRels; $i++) {
                $relation = $rels[$i];
                $principalType = $relation['principalType'];
                $dependentType = $relation['dependentType'];
                $principalPoly = in_array($principalType, $groupKeys);
                $dependentPoly = in_array($dependentType, $groupKeys);
                // if relation is not polymorphic, then move on
                if (!($principalPoly || $dependentPoly)) {
                    continue;
                } elseif ($principalPoly && $dependentPoly) {
                    // both ends are known-side, so mark them appropriately and keep on trucking
                    $rels[$i]['principalRSet'] = $placeholder;
                    $rels[$i]['dependentRSet'] = $placeholder;
                } else {
                    // if only one end is a known end of a polymorphic relation
                    $targRels = $principalPoly ? $groups[$principalType] : $groups[$dependentType];
                    $targUnknown = $targRels[$principalPoly ? $dependentType : $principalType];
                    $targProperty = $principalPoly ? $relation['dependentProp'] : $relation['principalProp'];
                    $msg = 'Specified unknown-side property ' . $targProperty
                           . ' not found in polymorphic relation map';
                    assert(in_array($targProperty, $targUnknown), $msg);

                    $targType = $principalPoly ? 'dependentRSet' : 'principalRSet';
                    $rels[$i][$targType] = $placeholder;
                    continue;
                }
            }
            self::$relationCache = $rels;
        }
        return self::$relationCache;
    }

    private function processRelationLine($line, $entityTypes, &$meta)
    {
        $principalType = $line['principalType'];
        $principalMult = $line['principalMult'];
        $principalProp = $line['principalProp'];
        $principalRSet = $line['principalRSet'];
        $dependentType = $line['dependentType'];
        $dependentMult = $line['dependentMult'];
        $dependentProp = $line['dependentProp'];
        $dependentRSet = $line['dependentRSet'];

        if (!isset($entityTypes[$principalType]) || !isset($entityTypes[$dependentType])) {
            return;
        }
        $principal = $entityTypes[$principalType];
        $dependent = $entityTypes[$dependentType];
        $isPoly = static::POLYMORPHIC == $principalRSet || static::POLYMORPHIC == $dependentRSet;

        if ($isPoly) {
            $this->attachReferencePolymorphic(
                $meta,
                $principalMult,
                $dependentMult,
                $principal,
                $dependent,
                $principalProp,
                $dependentProp,
                $principalRSet,
                $dependentRSet
            );
            return null;
        }
        $this->attachReferenceNonPolymorphic(
            $meta,
            $principalMult,
            $dependentMult,
            $principal,
            $dependent,
            $principalProp,
            $dependentProp
        );
        return null;
    }

    /**
     * @param $meta
     * @param $principalMult
     * @param $dependentMult
     * @param $principal
     * @param $dependent
     * @param $principalProp
     * @param $dependentProp
     */
    private function attachReferenceNonPolymorphic(
        &$meta,
        $principalMult,
        $dependentMult,
        $principal,
        $dependent,
        $principalProp,
        $dependentProp
    ) {
        //many-to-many
        if ('*' == $principalMult && '*' == $dependentMult) {
            $meta->addResourceSetReferencePropertyBidirectional(
                $principal,
                $dependent,
                $principalProp,
                $dependentProp
            );
            return;
        }
        //one-to-one
        if ('0..1' == $principalMult || '0..1' == $dependentMult) {
            assert($principalMult != $dependentMult, 'Cannot have both ends with 0..1 multiplicity');
            $meta->addResourceReferenceSinglePropertyBidirectional(
                $principal,
                $dependent,
                $principalProp,
                $dependentProp
            );
            return;
        }
        assert($principalMult != $dependentMult, 'Cannot have both ends same multiplicity for 1:N relation');
        //principal-one-to-dependent-many
        if ('*' == $principalMult) {
            $meta->addResourceReferencePropertyBidirectional(
                $principal,
                $dependent,
                $principalProp,
                $dependentProp
            );
            return;
        }
        //dependent-one-to-principal-many
        $meta->addResourceReferencePropertyBidirectional(
            $dependent,
            $principal,
            $dependentProp,
            $principalProp
        );
        return;
    }

    /**
     * @param $meta
     * @param $principalMult
     * @param $dependentMult
     * @param $principal
     * @param $dependent
     * @param $principalProp
     * @param $dependentProp
     */
    private function attachReferencePolymorphic(
        &$meta,
        $principalMult,
        $dependentMult,
        $principal,
        $dependent,
        $principalProp,
        $dependentProp,
        $principalRSet,
        $dependentRSet
    ) {
        $prinPoly = static::POLYMORPHIC == $principalRSet;
        $depPoly = static::POLYMORPHIC == $dependentRSet;
        $principalSet = (!$prinPoly) ? $principal->getCustomState()
            : $meta->resolveResourceSet(static::POLYMORPHIC_PLURAL);
        $dependentSet = (!$depPoly) ? $dependent->getCustomState()
            : $meta->resolveResourceSet(static::POLYMORPHIC_PLURAL);
        assert($principalSet instanceof ResourceSet, $principalRSet);
        assert($dependentSet instanceof ResourceSet, $dependentRSet);

        $isPrincipalAdded = null !== $principal->resolveProperty($principalProp);
        $isDependentAdded = null !== $dependent->resolveProperty($dependentProp);
        $prinMany = '*' == $principalMult;
        $depMany = '*' == $dependentMult;

        if (!$isPrincipalAdded) {
            if ('*' == $principalMult || $depMany) {
                $meta->addResourceSetReferenceProperty($principal, $principalProp, $dependentSet);
            } else {
                $meta->addResourceReferenceProperty($principal, $principalProp, $dependentSet, $prinPoly, $depMany);
            }
        }
        if (!$isDependentAdded) {
            if ('*' == $dependentMult || $prinMany) {
                $meta->addResourceSetReferenceProperty($dependent, $dependentProp, $principalSet);
            } else {
                $meta->addResourceReferenceProperty($dependent, $dependentProp, $principalSet, $depPoly, $prinMany);
            }
        }
        return;
    }

    public function reset()
    {
        self::$relationCache = null;
        self::$isBooted = false;
    }

    /**
     * Resolve possible reverse relation property names
     *
     * @param Model $source
     * @param Model $target
     * @param $propName
     * @return string|null
     */
    public function resolveReverseProperty(Model $source, Model $target, $propName)
    {
        assert(is_string($propName), 'Property name must be string');
        $relations = $this->getRepairedRoundTripRelations();

        $sourceName = get_class($source);
        $targName = get_class($target);

        $filter = function ($segment) use ($sourceName, $targName, $propName) {
            $match = $sourceName == $segment['principalType'];
            $match &= $targName == $segment['dependentType'];
            $match &= $propName == $segment['principalProp'];

            return $match;
        };

        // array_filter does not reset keys - we have to do it ourselves
        $trim = array_values(array_filter($relations, $filter));
        $result = 0 === count($trim) ? null : $trim[0]['dependentProp'];

        return $result;
    }
}


1		<?php
2
3		namespace AlgoWeb\PODataLaravel\Providers;
4
5		use AlgoWeb\PODataLaravel\Models\MetadataRelationHolder;
6		use Illuminate\Database\Eloquent\Model;
7		use Illuminate\Support\Facades\App;
8		use Illuminate\Support\ServiceProvider;
9		use Illuminate\Support\Facades\Cache;
10		use Illuminate\Support\Str;
11		use POData\Providers\Metadata\IMetadataProvider;
12		use POData\Providers\Metadata\ResourceEntityType;
13		use POData\Providers\Metadata\ResourceSet;
14		use POData\Providers\Metadata\ResourceType;
15		use POData\Providers\Metadata\SimpleMetadataProvider;
16		use Illuminate\Support\Facades\Route;
17		use Illuminate\Support\Facades\Schema as Schema;
18		use POData\Providers\Metadata\Type\TypeCode;
19
20	1	class MetadataProvider extends MetadataBaseProvider
21		{
22	1	protected $multConstraints = [ '0..1' => ['1'], '1' => ['0..1', ''], '' => ['1', '*']];
23		protected static $metaNAMESPACE = 'Data';
24		protected static $relationCache;
25	1	protected static $isBooted = false;
26		const POLYMORPHIC = 'polyMorphicPlaceholder';
27		const POLYMORPHIC_PLURAL = 'polyMorphicPlaceholders';
28	1
29	1	protected $relationHolder;
30
31		public function __construct($app)
32		{
33		parent::__construct($app);
34		$this->relationHolder = new MetadataRelationHolder();
35		self::$isBooted = false;
36		}
37
38		/**
39		* Bootstrap the application services. Post-boot.
40		*
41		* @return void
42		*/
43		public function boot()
44		{
45		self::$metaNAMESPACE = env('ODataMetaNamespace', 'Data');
46		// If we aren't migrated, there's no DB tables to pull metadata _from_, so bail out early
47		try {
48		if (!Schema::hasTable(config('database.migrations'))) {
49		return;
50		}
51		} catch (\Exception $e) {
52		return;
53		}
54
55		assert(false === self::$isBooted, 'Provider booted twice');
56		$isCaching = true === $this->getIsCaching();
57		$meta = Cache::get('metadata');
58		$hasCache = null != $meta;
59
60		if ($isCaching && $hasCache) {
61		App::instance('metadata', $meta);
62		return;
63		}
64		$meta = App::make('metadata');
65		$this->reset();
66
67		$stdRef = new \ReflectionClass(Model::class);
68		$abstract = $meta->addEntityType($stdRef, static::POLYMORPHIC, true, null);
69		$meta->addKeyProperty($abstract, 'PrimaryKey', TypeCode::STRING);
70
71		$meta->addResourceSet(static::POLYMORPHIC, $abstract);
72
73		$modelNames = $this->getCandidateModels();
74
75		list($entityTypes) = $this->getEntityTypesAndResourceSets($meta, $modelNames);
76		$entityTypes[static::POLYMORPHIC] = $abstract;
77
78		// need to lift EntityTypes, adjust for polymorphic-affected relations, etc
79		$biDirect = $this->getRepairedRoundTripRelations();
80
81		// now that endpoints are hooked up, tackle the relationships
82		// if we'd tried earlier, we'd be guaranteed to try to hook a relation up to null, which would be bad
83		foreach ($biDirect as $line) {
84		$this->processRelationLine($line, $entityTypes, $meta);
85		}
86
87		$key = 'metadata';
88		$this->handlePostBoot($isCaching, $hasCache, $key, $meta);
89		self::$isBooted = true;
90		}
91
92		/**
93		* Register the application services. Boot-time only.
94		*
95		* @return void
96		*/
97		public function register()
98		{
99		$this->app->singleton('metadata', function ($app) {
		0 ignored issues – show Unused Code introduced 2016-11-01 11:02 UTC by Report Bug Copy Issue Report The parameter `$app` is not used and could be removed. This check looks from parameters that have been defined for a function or method, but which are not used in the method body. Loading history...
100		return new SimpleMetadataProvider('Data', self::$metaNAMESPACE);
101		});
102		}
103
104		/**
105		* @return array
106		*/
107		protected function getCandidateModels()
108		{
109		$classes = $this->getClassMap();
110		$ends = [];
111		$startName = defined('PODATA_LARAVEL_APP_ROOT_NAMESPACE') ? PODATA_LARAVEL_APP_ROOT_NAMESPACE : 'App';
112		foreach ($classes as $name) {
113		if (\Illuminate\Support\Str::startsWith($name, $startName)) {
114		if (in_array('AlgoWeb\\PODataLaravel\\Models\\MetadataTrait', class_uses($name))) {
115		$ends[] = $name;
116		}
117		}
118		}
119		return $ends;
120		}
121
122		/**
123		* @param $meta
124		* @param $ends
125		* @return array[]
126		*/
127		protected function getEntityTypesAndResourceSets($meta, $ends)
128		{
129		assert($meta instanceof IMetadataProvider, get_class($meta));
130		$entityTypes = [];
131		$resourceSets = [];
132		$begins = [];
133		$numEnds = count($ends);
134
135		for ($i = 0; $i < $numEnds; $i++) {
136		$bitter = $ends[$i];
137		$fqModelName = $bitter;
138
139		$instance = App::make($fqModelName);
140		$name = strtolower($instance->getEndpointName());
141		$metaSchema = $instance->getXmlSchema();
142
143		// if for whatever reason we don't get an XML schema, move on to next entry and drop current one from
144		// further processing
145		if (null == $metaSchema) {
146		continue;
147		}
148		$entityTypes[$fqModelName] = $metaSchema;
149		$resourceSets[$fqModelName] = $meta->addResourceSet($name, $metaSchema);
150		$begins[] = $bitter;
151		}
152
153		return [$entityTypes, $resourceSets, $begins];
154		}
155
156		/**
157		* @return MetadataRelationHolder
158		*/
159		public function getRelationHolder()
160		{
161		return $this->relationHolder;
162		}
163
164		public function calculateRoundTripRelations()
165		{
166		$modelNames = $this->getCandidateModels();
167
168		foreach ($modelNames as $name) {
169		if (!$this->getRelationHolder()->hasClass($name)) {
170		$model = new $name();
171		$this->getRelationHolder()->addModel($model);
172		}
173		}
174
175		return $this->getRelationHolder()->getRelations();
176		}
177
178		public function getPolymorphicRelationGroups()
179		{
180		$modelNames = $this->getCandidateModels();
181
182		$knownSide = [];
183		$unknownSide = [];
184
185		$hooks = [];
186		// fish out list of polymorphic-affected models for further processing
187		foreach ($modelNames as $name) {
188		$model = new $name();
189		$isPoly = false;
190		if ($model->isKnownPolymorphSide()) {
191		$knownSide[$name] = [];
192		$isPoly = true;
193		}
194		if ($model->isUnknownPolymorphSide()) {
195		$unknownSide[$name] = [];
196		$isPoly = true;
197		}
198		if (false === $isPoly) {
199		continue;
200		}
201
202		$rels = $model->getRelationships();
203		// it doesn't matter if a model has no relationships here, that lack will simply be skipped over
204		// during hookup processing
205		$hooks[$name] = $rels;
206		}
207		// ensure we've only loaded up polymorphic-affected models
208		$knownKeys = array_keys($knownSide);
209		$unknownKeys = array_keys($unknownSide);
210		$dualKeys = array_intersect($knownKeys, $unknownKeys);
211		assert(count($hooks) == (count($unknownKeys) + count($knownKeys) - count($dualKeys)));
212		// if either list is empty, bail out - there's nothing to do
213		if (0 === count($knownSide) \|\| 0 === count($unknownSide)) {
214		return [];
215		}
216
217		// commence primary ignition
218
219		foreach ($unknownKeys as $key) {
220		assert(isset($hooks[$key]));
221		$hook = $hooks[$key];
222		foreach ($hook as $barb) {
223		foreach ($barb as $knownType => $propData) {
224		$propName = array_keys($propData)[0];
225		if (in_array($knownType, $knownKeys)) {
226		if (!isset($knownSide[$knownType][$key])) {
227		$knownSide[$knownType][$key] = [];
228		}
229		assert(isset($knownSide[$knownType][$key]));
230		$knownSide[$knownType][$key][] = $propData[$propName]['property'];
231		}
232		}
233		}
234		}
235
236		return $knownSide;
237		}
238
239		/**
240		* Get round-trip relations after inserting polymorphic-powered placeholders
241		*
242		* @return array
243		*/
244		public function getRepairedRoundTripRelations()
245		{
246		if (!isset(self::$relationCache)) {
247		$rels = $this->calculateRoundTripRelations();
248		$groups = $this->getPolymorphicRelationGroups();
249
250		if (0 === count($groups)) {
251		self::$relationCache = $rels;
252		return $rels;
253		}
254
255		$placeholder = static::POLYMORPHIC;
256
257		$groupKeys = array_keys($groups);
258
259		// we have at least one polymorphic relation, need to dig it out
260		$numRels = count($rels);
261		for ($i = 0; $i < $numRels; $i++) {
262		$relation = $rels[$i];
263		$principalType = $relation['principalType'];
264		$dependentType = $relation['dependentType'];
265		$principalPoly = in_array($principalType, $groupKeys);
266		$dependentPoly = in_array($dependentType, $groupKeys);
267		// if relation is not polymorphic, then move on
268		if (!($principalPoly \|\| $dependentPoly)) {
269		continue;
270		} elseif ($principalPoly && $dependentPoly) {
271		// both ends are known-side, so mark them appropriately and keep on trucking
272		$rels[$i]['principalRSet'] = $placeholder;
273		$rels[$i]['dependentRSet'] = $placeholder;
274		} else {
275		// if only one end is a known end of a polymorphic relation
276		$targRels = $principalPoly ? $groups[$principalType] : $groups[$dependentType];
277		$targUnknown = $targRels[$principalPoly ? $dependentType : $principalType];
278		$targProperty = $principalPoly ? $relation['dependentProp'] : $relation['principalProp'];
279		$msg = 'Specified unknown-side property ' . $targProperty
280		. ' not found in polymorphic relation map';
281		assert(in_array($targProperty, $targUnknown), $msg);
282
283		$targType = $principalPoly ? 'dependentRSet' : 'principalRSet';
284		$rels[$i][$targType] = $placeholder;
285		continue;
286		}
287		}
288		self::$relationCache = $rels;
289		}
290		return self::$relationCache;
291		}
292
293		private function processRelationLine($line, $entityTypes, &$meta)
294		{
295		$principalType = $line['principalType'];
296		$principalMult = $line['principalMult'];
297		$principalProp = $line['principalProp'];
298		$principalRSet = $line['principalRSet'];
299		$dependentType = $line['dependentType'];
300		$dependentMult = $line['dependentMult'];
301		$dependentProp = $line['dependentProp'];
302		$dependentRSet = $line['dependentRSet'];
303
304		if (!isset($entityTypes[$principalType]) \|\| !isset($entityTypes[$dependentType])) {
305		return;
306		}
307		$principal = $entityTypes[$principalType];
308		$dependent = $entityTypes[$dependentType];
309		$isPoly = static::POLYMORPHIC == $principalRSet \|\| static::POLYMORPHIC == $dependentRSet;
310
311		if ($isPoly) {
312		$this->attachReferencePolymorphic(
313		$meta,
314		$principalMult,
315		$dependentMult,
316		$principal,
317		$dependent,
318		$principalProp,
319		$dependentProp,
320		$principalRSet,
321		$dependentRSet
322		);
323		return null;
324		}
325		$this->attachReferenceNonPolymorphic(
326		$meta,
327		$principalMult,
328		$dependentMult,
329		$principal,
330		$dependent,
331		$principalProp,
332		$dependentProp
333		);
334		return null;
335		}
336
337		/**
338		* @param $meta
339		* @param $principalMult
340		* @param $dependentMult
341		* @param $principal
342		* @param $dependent
343		* @param $principalProp
344		* @param $dependentProp
345		*/
346		private function attachReferenceNonPolymorphic(
347		&$meta,
348		$principalMult,
349		$dependentMult,
350		$principal,
351		$dependent,
352		$principalProp,
353		$dependentProp
354		) {
355		//many-to-many
356		if ('' == $principalMult && '' == $dependentMult) {
357		$meta->addResourceSetReferencePropertyBidirectional(
358		$principal,
359		$dependent,
360		$principalProp,
361		$dependentProp
362		);
363		return;
364		}
365		//one-to-one
366		if ('0..1' == $principalMult \|\| '0..1' == $dependentMult) {
367		assert($principalMult != $dependentMult, 'Cannot have both ends with 0..1 multiplicity');
368		$meta->addResourceReferenceSinglePropertyBidirectional(
369		$principal,
370		$dependent,
371		$principalProp,
372		$dependentProp
373		);
374		return;
375		}
376		assert($principalMult != $dependentMult, 'Cannot have both ends same multiplicity for 1:N relation');
377		//principal-one-to-dependent-many
378		if ('*' == $principalMult) {
379		$meta->addResourceReferencePropertyBidirectional(
380		$principal,
381		$dependent,
382		$principalProp,
383		$dependentProp
384		);
385		return;
386		}
387		//dependent-one-to-principal-many
388		$meta->addResourceReferencePropertyBidirectional(
389		$dependent,
390		$principal,
391		$dependentProp,
392		$principalProp
393		);
394		return;
395		}
396
397		/**
398		* @param $meta
399		* @param $principalMult
400		* @param $dependentMult
401		* @param $principal
402		* @param $dependent
403		* @param $principalProp
404		* @param $dependentProp
405		*/
406		private function attachReferencePolymorphic(
407		&$meta,
408		$principalMult,
409		$dependentMult,
410		$principal,
411		$dependent,
412		$principalProp,
413		$dependentProp,
414		$principalRSet,
415		$dependentRSet
416		) {
417		$prinPoly = static::POLYMORPHIC == $principalRSet;
418		$depPoly = static::POLYMORPHIC == $dependentRSet;
419		$principalSet = (!$prinPoly) ? $principal->getCustomState()
420		: $meta->resolveResourceSet(static::POLYMORPHIC_PLURAL);
421		$dependentSet = (!$depPoly) ? $dependent->getCustomState()
422		: $meta->resolveResourceSet(static::POLYMORPHIC_PLURAL);
423		assert($principalSet instanceof ResourceSet, $principalRSet);
424		assert($dependentSet instanceof ResourceSet, $dependentRSet);
425
426		$isPrincipalAdded = null !== $principal->resolveProperty($principalProp);
427		$isDependentAdded = null !== $dependent->resolveProperty($dependentProp);
428		$prinMany = '*' == $principalMult;
429		$depMany = '*' == $dependentMult;
430
431		if (!$isPrincipalAdded) {
432		if ('*' == $principalMult \|\| $depMany) {
433		$meta->addResourceSetReferenceProperty($principal, $principalProp, $dependentSet);
434		} else {
435		$meta->addResourceReferenceProperty($principal, $principalProp, $dependentSet, $prinPoly, $depMany);
436		}
437		}
438		if (!$isDependentAdded) {
439		if ('*' == $dependentMult \|\| $prinMany) {
440		$meta->addResourceSetReferenceProperty($dependent, $dependentProp, $principalSet);
441		} else {
442		$meta->addResourceReferenceProperty($dependent, $dependentProp, $principalSet, $depPoly, $prinMany);
443		}
444		}
445		return;
446		}
447
448		public function reset()
449		{
450		self::$relationCache = null;
451		self::$isBooted = false;
452		}
453
454		/**
455		* Resolve possible reverse relation property names
456		*
457		* @param Model $source
458		* @param Model $target
459		* @param $propName
460		* @return string\|null
461		*/
462		public function resolveReverseProperty(Model $source, Model $target, $propName)
463		{
464		assert(is_string($propName), 'Property name must be string');
465		$relations = $this->getRepairedRoundTripRelations();
466
467		$sourceName = get_class($source);
468		$targName = get_class($target);
469
470		$filter = function ($segment) use ($sourceName, $targName, $propName) {
471		$match = $sourceName == $segment['principalType'];
472		$match &= $targName == $segment['dependentType'];
473		$match &= $propName == $segment['principalProp'];
474
475		return $match;
476		};
477
478		// array_filter does not reset keys - we have to do it ourselves
479		$trim = array_values(array_filter($relations, $filter));
480		$result = 0 === count($trim) ? null : $trim[0]['dependentProp'];
481
482		return $result;
483		}
484		}
485

Algo-Web / POData-Laravel

Pull Request — master (#108)

MetadataProvider::attachReferencePolymorphic() D

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