MetadataProvider::attachReferencePolymorphic() - Code Metrics - Inspection of "Fix relation calculation" - Algo-Web/POData-Laravel - Measure and Improve Code Quality continuously with Scrutinizer

Test Failed

Pull Request — master (#106)

by Alex

created 2017-09-02 17:29 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 $rawRelationCache;
    const POLYMORPHIC = 'polyMorphicPlaceholder';
    const POLYMORPHIC_PLURAL = 'polyMorphicPlaceholders';
    protected $relationHolder;

    /**
     * Create a new service provider instance.
     *
     * @param  \Illuminate\Contracts\Foundation\Application  $app
     * @return void

     */
    public function __construct($app)
    {
        parent::__construct($app);
        $this->relationHolder = new MetadataRelationHolder();
    }

    /**
     * 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;
        }

        $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);
    }

    /**
     * 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];
    }

    public function calculateRoundTripRelations()

    {
        if (!isset(static::$rawRelationCache)) {
            $modelNames = $this->getCandidateModels();

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

            // model relation gubbins are assembled, now fish out relation results from holder
            $lines = [];
            foreach ($modelNames as $name) {
                $workLines = $this->getRelationHolder()->getRelationsByClass($name);
                foreach ($workLines as $work) {
                    // if this relation line is already in $rawLines, don't add it again
                    $work['principalRSet'] = $work['principalType'];
                    $work['dependentRSet'] = $work['dependentType'];
                    if (!in_array($work, $lines)) {
                        $lines[] = $work;
                    }
                }
            }
            static::$rawRelationCache = $lines;
        }

        return static::$rawRelationCache;
    }

    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;
                } else {
                    // if only one end is a known end of a polymorphic relation
                    // for moment we're punting on both
                    $oneEnd = $principalPoly !== $dependentPoly;
                    assert($oneEnd, 'Multi-generational polymorphic relation chains not implemented');
                    $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::$relationCache = null;
        self::$rawRelationCache = null;
        $this->getRelationHolder()->reset();
    }

    /**
     * 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;
    }

    /**
     * @return MetadataRelationHolder
     */
    public function getRelationHolder()
    {
        assert(null !== $this->relationHolder, 'Relation holder must not be null');
        return $this->relationHolder;
    }
}


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 $rawRelationCache;
26		const POLYMORPHIC = 'polyMorphicPlaceholder';
27		const POLYMORPHIC_PLURAL = 'polyMorphicPlaceholders';
28	1	protected $relationHolder;
29	1
30		/**
31		* Create a new service provider instance.
32		*
33		* @param \Illuminate\Contracts\Foundation\Application $app
34		* @return void
		0 ignored issues – show Comprehensibility Best Practice introduced 2017-09-02 17:37 UTC by Report Bug Copy Issue Report Adding a `@return` annotation to constructors is generally not recommended as a constructor does not have a meaningful return value. Adding a `@return` annotation to a constructor is not recommended, since a constructor does not have a meaningful return value. Please refer to the PHP core documentation on constructors. Loading history...
35		*/
36		public function __construct($app)
37		{
38		parent::__construct($app);
39		$this->relationHolder = new MetadataRelationHolder();
40		}
41
42		/**
43		* Bootstrap the application services. Post-boot.
44		*
45		* @return void
46		*/
47		public function boot()
48		{
49		self::$metaNAMESPACE = env('ODataMetaNamespace', 'Data');
50		// If we aren't migrated, there's no DB tables to pull metadata _from_, so bail out early
51		try {
52		if (!Schema::hasTable(config('database.migrations'))) {
53		return;
54		}
55		} catch (\Exception $e) {
56		return;
57		}
58
59		$isCaching = true === $this->getIsCaching();
60		$meta = Cache::get('metadata');
61		$hasCache = null != $meta;
62
63		if ($isCaching && $hasCache) {
64		App::instance('metadata', $meta);
65		return;
66		}
67		$meta = App::make('metadata');
68		$this->reset();
69
70		$stdRef = new \ReflectionClass(Model::class);
71		$abstract = $meta->addEntityType($stdRef, static::POLYMORPHIC, true, null);
72		$meta->addKeyProperty($abstract, 'PrimaryKey', TypeCode::STRING);
73
74		$meta->addResourceSet(static::POLYMORPHIC, $abstract);
75
76		$modelNames = $this->getCandidateModels();
77
78		list($entityTypes) = $this->getEntityTypesAndResourceSets($meta, $modelNames);
79		$entityTypes[static::POLYMORPHIC] = $abstract;
80
81		// need to lift EntityTypes, adjust for polymorphic-affected relations, etc
82		$biDirect = $this->getRepairedRoundTripRelations();
83
84		// now that endpoints are hooked up, tackle the relationships
85		// if we'd tried earlier, we'd be guaranteed to try to hook a relation up to null, which would be bad
86		foreach ($biDirect as $line) {
87		$this->processRelationLine($line, $entityTypes, $meta);
88		}
89
90		$key = 'metadata';
91		$this->handlePostBoot($isCaching, $hasCache, $key, $meta);
92		}
93
94		/**
95		* Register the application services. Boot-time only.
96		*
97		* @return void
98		*/
99		public function register()
100		{
101		$this->app->singleton('metadata', function ($app) {
		0 ignored issues – show Unused Code introduced 2016-11-01 11:02 UTC by Report Bug Copy Issue Report The parameter `$app` is not used and could be removed. This check looks from parameters that have been defined for a function or method, but which are not used in the method body. Loading history...
102		return new SimpleMetadataProvider('Data', self::$metaNAMESPACE);
103		});
104		}
105
106		/**
107		* @return array
108		*/
109		protected function getCandidateModels()
110		{
111		$classes = $this->getClassMap();
112		$ends = [];
113		$startName = defined('PODATA_LARAVEL_APP_ROOT_NAMESPACE') ? PODATA_LARAVEL_APP_ROOT_NAMESPACE : 'App';
114		foreach ($classes as $name) {
115		if (\Illuminate\Support\Str::startsWith($name, $startName)) {
116		if (in_array('AlgoWeb\\PODataLaravel\\Models\\MetadataTrait', class_uses($name))) {
117		$ends[] = $name;
118		}
119		}
120		}
121		return $ends;
122		}
123
124		/**
125		* @param $meta
126		* @param $ends
127		* @return array[]
128		*/
129		protected function getEntityTypesAndResourceSets($meta, $ends)
130		{
131		assert($meta instanceof IMetadataProvider, get_class($meta));
132		$entityTypes = [];
133		$resourceSets = [];
134		$begins = [];
135		$numEnds = count($ends);
136
137		for ($i = 0; $i < $numEnds; $i++) {
138		$bitter = $ends[$i];
139		$fqModelName = $bitter;
140
141		$instance = App::make($fqModelName);
142		$name = strtolower($instance->getEndpointName());
143		$metaSchema = $instance->getXmlSchema();
144
145		// if for whatever reason we don't get an XML schema, move on to next entry and drop current one from
146		// further processing
147		if (null == $metaSchema) {
148		continue;
149		}
150		$entityTypes[$fqModelName] = $metaSchema;
151		$resourceSets[$fqModelName] = $meta->addResourceSet($name, $metaSchema);
152		$begins[] = $bitter;
153		}
154
155		return [$entityTypes, $resourceSets, $begins];
156		}
157
158		public function calculateRoundTripRelations()
		0 ignored issues – show Documentation introduced 2017-09-02 17:37 UTC by Report Bug Copy Issue Report The return type could not be reliably inferred; please add a `@return` annotation. Our type inference engine in quite powerful, but sometimes the code does not provide enough clues to go by. In these cases we request you to add a `@return` annotation as described here. Loading history...
159		{
160		if (!isset(static::$rawRelationCache)) {
161		$modelNames = $this->getCandidateModels();
162
163		foreach ($modelNames as $name) {
164		$model = new $name();
165		$this->getRelationHolder()->addModel($model);
166		}
167
168		// model relation gubbins are assembled, now fish out relation results from holder
169		$lines = [];
170		foreach ($modelNames as $name) {
171		$workLines = $this->getRelationHolder()->getRelationsByClass($name);
172		foreach ($workLines as $work) {
173		// if this relation line is already in $rawLines, don't add it again
174		$work['principalRSet'] = $work['principalType'];
175		$work['dependentRSet'] = $work['dependentType'];
176		if (!in_array($work, $lines)) {
177		$lines[] = $work;
178		}
179		}
180		}
181		static::$rawRelationCache = $lines;
182		}
183
184		return static::$rawRelationCache;
185		}
186
187		public function getPolymorphicRelationGroups()
188		{
189		$modelNames = $this->getCandidateModels();
190
191		$knownSide = [];
192		$unknownSide = [];
193
194		$hooks = [];
195		// fish out list of polymorphic-affected models for further processing
196		foreach ($modelNames as $name) {
197		$model = new $name();
198		$isPoly = false;
199		if ($model->isKnownPolymorphSide()) {
200		$knownSide[$name] = [];
201		$isPoly = true;
202		}
203		if ($model->isUnknownPolymorphSide()) {
204		$unknownSide[$name] = [];
205		$isPoly = true;
206		}
207		if (false === $isPoly) {
208		continue;
209		}
210
211		$rels = $model->getRelationships();
212		// it doesn't matter if a model has no relationships here, that lack will simply be skipped over
213		// during hookup processing
214		$hooks[$name] = $rels;
215		}
216		// ensure we've only loaded up polymorphic-affected models
217		$knownKeys = array_keys($knownSide);
218		$unknownKeys = array_keys($unknownSide);
219		$dualKeys = array_intersect($knownKeys, $unknownKeys);
220		assert(count($hooks) == (count($unknownKeys) + count($knownKeys) - count($dualKeys)));
221		// if either list is empty, bail out - there's nothing to do
222		if (0 === count($knownSide) \|\| 0 === count($unknownSide)) {
223		return [];
224		}
225
226		// commence primary ignition
227
228		foreach ($unknownKeys as $key) {
229		assert(isset($hooks[$key]));
230		$hook = $hooks[$key];
231		foreach ($hook as $barb) {
232		foreach ($barb as $knownType => $propData) {
233		$propName = array_keys($propData)[0];
234		if (in_array($knownType, $knownKeys)) {
235		if (!isset($knownSide[$knownType][$key])) {
236		$knownSide[$knownType][$key] = [];
237		}
238		assert(isset($knownSide[$knownType][$key]));
239		$knownSide[$knownType][$key][] = $propData[$propName]['property'];
240		}
241		}
242		}
243		}
244
245		return $knownSide;
246		}
247
248		/**
249		* Get round-trip relations after inserting polymorphic-powered placeholders
250		*
251		* @return array
252		*/
253		public function getRepairedRoundTripRelations()
254		{
255		if (!isset(self::$relationCache)) {
256		$rels = $this->calculateRoundTripRelations();
257		$groups = $this->getPolymorphicRelationGroups();
258
259		if (0 === count($groups)) {
260		self::$relationCache = $rels;
261		return $rels;
262		}
263
264		$placeholder = static::POLYMORPHIC;
265
266		$groupKeys = array_keys($groups);
267
268		// we have at least one polymorphic relation, need to dig it out
269		$numRels = count($rels);
270		for ($i = 0; $i < $numRels; $i++) {
271		$relation = $rels[$i];
272		$principalType = $relation['principalType'];
273		$dependentType = $relation['dependentType'];
274		$principalPoly = in_array($principalType, $groupKeys);
275		$dependentPoly = in_array($dependentType, $groupKeys);
276		// if relation is not polymorphic, then move on
277		if (!($principalPoly \|\| $dependentPoly)) {
278		continue;
279		} else {
280		// if only one end is a known end of a polymorphic relation
281		// for moment we're punting on both
282		$oneEnd = $principalPoly !== $dependentPoly;
283		assert($oneEnd, 'Multi-generational polymorphic relation chains not implemented');
284		$targRels = $principalPoly ? $groups[$principalType] : $groups[$dependentType];
285		$targUnknown = $targRels[$principalPoly ? $dependentType : $principalType];
286		$targProperty = $principalPoly ? $relation['dependentProp'] : $relation['principalProp'];
287		$msg = 'Specified unknown-side property ' . $targProperty
288		. ' not found in polymorphic relation map';
289		assert(in_array($targProperty, $targUnknown), $msg);
290
291		$targType = $principalPoly ? 'dependentRSet' : 'principalRSet';
292		$rels[$i][$targType] = $placeholder;
293		continue;
294		}
295		}
296		self::$relationCache = $rels;
297		}
298		return self::$relationCache;
299		}
300
301		private function processRelationLine($line, $entityTypes, &$meta)
302		{
303		$principalType = $line['principalType'];
304		$principalMult = $line['principalMult'];
305		$principalProp = $line['principalProp'];
306		$principalRSet = $line['principalRSet'];
307		$dependentType = $line['dependentType'];
308		$dependentMult = $line['dependentMult'];
309		$dependentProp = $line['dependentProp'];
310		$dependentRSet = $line['dependentRSet'];
311
312		if (!isset($entityTypes[$principalType]) \|\| !isset($entityTypes[$dependentType])) {
313		return;
314		}
315		$principal = $entityTypes[$principalType];
316		$dependent = $entityTypes[$dependentType];
317		$isPoly = static::POLYMORPHIC == $principalRSet \|\| static::POLYMORPHIC == $dependentRSet;
318
319		if ($isPoly) {
320		$this->attachReferencePolymorphic(
321		$meta,
322		$principalMult,
323		$dependentMult,
324		$principal,
325		$dependent,
326		$principalProp,
327		$dependentProp,
328		$principalRSet,
329		$dependentRSet
330		);
331		return null;
332		}
333		$this->attachReferenceNonPolymorphic(
334		$meta,
335		$principalMult,
336		$dependentMult,
337		$principal,
338		$dependent,
339		$principalProp,
340		$dependentProp
341		);
342		return null;
343		}
344
345		/**
346		* @param $meta
347		* @param $principalMult
348		* @param $dependentMult
349		* @param $principal
350		* @param $dependent
351		* @param $principalProp
352		* @param $dependentProp
353		*/
354		private function attachReferenceNonPolymorphic(
355		&$meta,
356		$principalMult,
357		$dependentMult,
358		$principal,
359		$dependent,
360		$principalProp,
361		$dependentProp
362		) {
363		//many-to-many
364		if ('' == $principalMult && '' == $dependentMult) {
365		$meta->addResourceSetReferencePropertyBidirectional(
366		$principal,
367		$dependent,
368		$principalProp,
369		$dependentProp
370		);
371		return;
372		}
373		//one-to-one
374		if ('0..1' == $principalMult \|\| '0..1' == $dependentMult) {
375		assert($principalMult != $dependentMult, 'Cannot have both ends with 0..1 multiplicity');
376		$meta->addResourceReferenceSinglePropertyBidirectional(
377		$principal,
378		$dependent,
379		$principalProp,
380		$dependentProp
381		);
382		return;
383		}
384		assert($principalMult != $dependentMult, 'Cannot have both ends same multiplicity for 1:N relation');
385		//principal-one-to-dependent-many
386		if ('*' == $principalMult) {
387		$meta->addResourceReferencePropertyBidirectional(
388		$principal,
389		$dependent,
390		$principalProp,
391		$dependentProp
392		);
393		return;
394		}
395		//dependent-one-to-principal-many
396		$meta->addResourceReferencePropertyBidirectional(
397		$dependent,
398		$principal,
399		$dependentProp,
400		$principalProp
401		);
402		return;
403		}
404
405		/**
406		* @param $meta
407		* @param $principalMult
408		* @param $dependentMult
409		* @param $principal
410		* @param $dependent
411		* @param $principalProp
412		* @param $dependentProp
413		*/
414		private function attachReferencePolymorphic(
415		&$meta,
416		$principalMult,
417		$dependentMult,
418		$principal,
419		$dependent,
420		$principalProp,
421		$dependentProp,
422		$principalRSet,
423		$dependentRSet
424		) {
425		$prinPoly = static::POLYMORPHIC == $principalRSet;
426		$depPoly = static::POLYMORPHIC == $dependentRSet;
427		$principalSet = (!$prinPoly) ? $principal->getCustomState()
428		: $meta->resolveResourceSet(static::POLYMORPHIC_PLURAL);
429		$dependentSet = (!$depPoly) ? $dependent->getCustomState()
430		: $meta->resolveResourceSet(static::POLYMORPHIC_PLURAL);
431		assert($principalSet instanceof ResourceSet, $principalRSet);
432		assert($dependentSet instanceof ResourceSet, $dependentRSet);
433
434		$isPrincipalAdded = null !== $principal->resolveProperty($principalProp);
435		$isDependentAdded = null !== $dependent->resolveProperty($dependentProp);
436		$prinMany = '*' == $principalMult;
437		$depMany = '*' == $dependentMult;
438
439		if (!$isPrincipalAdded) {
440		if ('*' == $principalMult \|\| $depMany) {
441		$meta->addResourceSetReferenceProperty($principal, $principalProp, $dependentSet);
442		} else {
443		$meta->addResourceReferenceProperty($principal, $principalProp, $dependentSet, $prinPoly, $depMany);
444		}
445		}
446		if (!$isDependentAdded) {
447		if ('*' == $dependentMult \|\| $prinMany) {
448		$meta->addResourceSetReferenceProperty($dependent, $dependentProp, $principalSet);
449		} else {
450		$meta->addResourceReferenceProperty($dependent, $dependentProp, $principalSet, $depPoly, $prinMany);
451		}
452		}
453		return;
454		}
455
456		public function reset()
457		{
458		self::$relationCache = null;
459		self::$rawRelationCache = null;
460		$this->getRelationHolder()->reset();
461		}
462
463		/**
464		* Resolve possible reverse relation property names
465		*
466		* @param Model $source
467		* @param Model $target
468		* @param $propName
469		* @return string\|null
470		*/
471		public function resolveReverseProperty(Model $source, Model $target, $propName)
472		{
473		assert(is_string($propName), 'Property name must be string');
474		$relations = $this->getRepairedRoundTripRelations();
475
476		$sourceName = get_class($source);
477		$targName = get_class($target);
478
479		$filter = function ($segment) use ($sourceName, $targName, $propName) {
480		$match = $sourceName == $segment['principalType'];
481		$match &= $targName == $segment['dependentType'];
482		$match &= $propName == $segment['principalProp'];
483
484		return $match;
485		};
486
487		// array_filter does not reset keys - we have to do it ourselves
488		$trim = array_values(array_filter($relations, $filter));
489		$result = 0 === count($trim) ? null : $trim[0]['dependentProp'];
490
491		return $result;
492		}
493
494		/**
495		* @return MetadataRelationHolder
496		*/
497		public function getRelationHolder()
498		{
499		assert(null !== $this->relationHolder, 'Relation holder must not be null');
500		return $this->relationHolder;
501		}
502		}
503

Algo-Web / POData-Laravel

Pull Request — master (#106)

MetadataProvider::attachReferencePolymorphic() D

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