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 2017-09-03 04:20 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  $app
     */
    public function __construct($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];
    }

    /**
     * Get round-trip relations before inserting polymorphic-powered placeholders
     *
     * @return array[]
     */
    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 $app
34		*/
35		public function __construct($app)
36		{
37		parent::__construct($app);
38		$this->relationHolder = new MetadataRelationHolder();
39		}
40
41		/**
42		* Bootstrap the application services. Post-boot.
43		*
44		* @return void
45		*/
46		public function boot()
47		{
48		self::$metaNAMESPACE = env('ODataMetaNamespace', 'Data');
49		// If we aren't migrated, there's no DB tables to pull metadata _from_, so bail out early
50		try {
51		if (!Schema::hasTable(config('database.migrations'))) {
52		return;
53		}
54		} catch (\Exception $e) {
55		return;
56		}
57
58		$isCaching = true === $this->getIsCaching();
59		$meta = Cache::get('metadata');
60		$hasCache = null != $meta;
61
62		if ($isCaching && $hasCache) {
63		App::instance('metadata', $meta);
64		return;
65		}
66		$meta = App::make('metadata');
67		$this->reset();
68
69		$stdRef = new \ReflectionClass(Model::class);
70		$abstract = $meta->addEntityType($stdRef, static::POLYMORPHIC, true, null);
71		$meta->addKeyProperty($abstract, 'PrimaryKey', TypeCode::STRING);
72
73		$meta->addResourceSet(static::POLYMORPHIC, $abstract);
74
75		$modelNames = $this->getCandidateModels();
76
77		list($entityTypes) = $this->getEntityTypesAndResourceSets($meta, $modelNames);
78		$entityTypes[static::POLYMORPHIC] = $abstract;
79
80		// need to lift EntityTypes, adjust for polymorphic-affected relations, etc
81		$biDirect = $this->getRepairedRoundTripRelations();
82
83		// now that endpoints are hooked up, tackle the relationships
84		// if we'd tried earlier, we'd be guaranteed to try to hook a relation up to null, which would be bad
85		foreach ($biDirect as $line) {
86		$this->processRelationLine($line, $entityTypes, $meta);
87		}
88
89		$key = 'metadata';
90		$this->handlePostBoot($isCaching, $hasCache, $key, $meta);
91		}
92
93		/**
94		* Register the application services. Boot-time only.
95		*
96		* @return void
97		*/
98		public function register()
99		{
100		$this->app->singleton('metadata', function ($app) {
		0 ignored issues – show Unused Code introduced 2016-11-01 11:02 UTC by Report Bug Copy Issue Report The parameter `$app` is not used and could be removed. This check looks from parameters that have been defined for a function or method, but which are not used in the method body. Loading history...
101		return new SimpleMetadataProvider('Data', self::$metaNAMESPACE);
102		});
103		}
104
105		/**
106		* @return array
107		*/
108		protected function getCandidateModels()
109		{
110		$classes = $this->getClassMap();
111		$ends = [];
112		$startName = defined('PODATA_LARAVEL_APP_ROOT_NAMESPACE') ? PODATA_LARAVEL_APP_ROOT_NAMESPACE : 'App';
113		foreach ($classes as $name) {
114		if (\Illuminate\Support\Str::startsWith($name, $startName)) {
115		if (in_array('AlgoWeb\\PODataLaravel\\Models\\MetadataTrait', class_uses($name))) {
116		$ends[] = $name;
117		}
118		}
119		}
120		return $ends;
121		}
122
123		/**
124		* @param $meta
125		* @param $ends
126		* @return array[]
127		*/
128		protected function getEntityTypesAndResourceSets($meta, $ends)
129		{
130		assert($meta instanceof IMetadataProvider, get_class($meta));
131		$entityTypes = [];
132		$resourceSets = [];
133		$begins = [];
134		$numEnds = count($ends);
135
136		for ($i = 0; $i < $numEnds; $i++) {
137		$bitter = $ends[$i];
138		$fqModelName = $bitter;
139
140		$instance = App::make($fqModelName);
141		$name = strtolower($instance->getEndpointName());
142		$metaSchema = $instance->getXmlSchema();
143
144		// if for whatever reason we don't get an XML schema, move on to next entry and drop current one from
145		// further processing
146		if (null == $metaSchema) {
147		continue;
148		}
149		$entityTypes[$fqModelName] = $metaSchema;
150		$resourceSets[$fqModelName] = $meta->addResourceSet($name, $metaSchema);
151		$begins[] = $bitter;
152		}
153
154		return [$entityTypes, $resourceSets, $begins];
155		}
156
157		/**
158		* Get round-trip relations before inserting polymorphic-powered placeholders
159		*
160		* @return array[]
161		*/
162		public function calculateRoundTripRelations()
163		{
164		if (!isset(static::$rawRelationCache)) {
165		$modelNames = $this->getCandidateModels();
166
167		foreach ($modelNames as $name) {
168		$model = new $name();
169		$this->getRelationHolder()->addModel($model);
170		}
171
172		// model relation gubbins are assembled, now fish out relation results from holder
173		$lines = [];
174		foreach ($modelNames as $name) {
175		$workLines = $this->getRelationHolder()->getRelationsByClass($name);
176		foreach ($workLines as $work) {
177		// if this relation line is already in $rawLines, don't add it again
178		$work['principalRSet'] = $work['principalType'];
179		$work['dependentRSet'] = $work['dependentType'];
180		if (!in_array($work, $lines)) {
181		$lines[] = $work;
182		}
183		}
184		}
185		static::$rawRelationCache = $lines;
186		}
187
188		return static::$rawRelationCache;
189		}
190
191		public function getPolymorphicRelationGroups()
192		{
193		$modelNames = $this->getCandidateModels();
194
195		$knownSide = [];
196		$unknownSide = [];
197
198		$hooks = [];
199		// fish out list of polymorphic-affected models for further processing
200		foreach ($modelNames as $name) {
201		$model = new $name();
202		$isPoly = false;
203		if ($model->isKnownPolymorphSide()) {
204		$knownSide[$name] = [];
205		$isPoly = true;
206		}
207		if ($model->isUnknownPolymorphSide()) {
208		$unknownSide[$name] = [];
209		$isPoly = true;
210		}
211		if (false === $isPoly) {
212		continue;
213		}
214
215		$rels = $model->getRelationships();
216		// it doesn't matter if a model has no relationships here, that lack will simply be skipped over
217		// during hookup processing
218		$hooks[$name] = $rels;
219		}
220		// ensure we've only loaded up polymorphic-affected models
221		$knownKeys = array_keys($knownSide);
222		$unknownKeys = array_keys($unknownSide);
223		$dualKeys = array_intersect($knownKeys, $unknownKeys);
224		assert(count($hooks) == (count($unknownKeys) + count($knownKeys) - count($dualKeys)));
225		// if either list is empty, bail out - there's nothing to do
226		if (0 === count($knownSide) \|\| 0 === count($unknownSide)) {
227		return [];
228		}
229
230		// commence primary ignition
231
232		foreach ($unknownKeys as $key) {
233		assert(isset($hooks[$key]));
234		$hook = $hooks[$key];
235		foreach ($hook as $barb) {
236		foreach ($barb as $knownType => $propData) {
237		$propName = array_keys($propData)[0];
238		if (in_array($knownType, $knownKeys)) {
239		if (!isset($knownSide[$knownType][$key])) {
240		$knownSide[$knownType][$key] = [];
241		}
242		assert(isset($knownSide[$knownType][$key]));
243		$knownSide[$knownType][$key][] = $propData[$propName]['property'];
244		}
245		}
246		}
247		}
248
249		return $knownSide;
250		}
251
252		/**
253		* Get round-trip relations after inserting polymorphic-powered placeholders
254		*
255		* @return array
256		*/
257		public function getRepairedRoundTripRelations()
258		{
259		if (!isset(self::$relationCache)) {
260		$rels = $this->calculateRoundTripRelations();
261		$groups = $this->getPolymorphicRelationGroups();
262
263		if (0 === count($groups)) {
264		self::$relationCache = $rels;
265		return $rels;
266		}
267
268		$placeholder = static::POLYMORPHIC;
269
270		$groupKeys = array_keys($groups);
271
272		// we have at least one polymorphic relation, need to dig it out
273		$numRels = count($rels);
274		for ($i = 0; $i < $numRels; $i++) {
275		$relation = $rels[$i];
276		$principalType = $relation['principalType'];
277		$dependentType = $relation['dependentType'];
278		$principalPoly = in_array($principalType, $groupKeys);
279		$dependentPoly = in_array($dependentType, $groupKeys);
280		// if relation is not polymorphic, then move on
281		if (!($principalPoly \|\| $dependentPoly)) {
282		continue;
283		} else {
284		// if only one end is a known end of a polymorphic relation
285		// for moment we're punting on both
286		$oneEnd = $principalPoly !== $dependentPoly;
287		assert($oneEnd, 'Multi-generational polymorphic relation chains not implemented');
288		$targRels = $principalPoly ? $groups[$principalType] : $groups[$dependentType];
289		$targUnknown = $targRels[$principalPoly ? $dependentType : $principalType];
290		$targProperty = $principalPoly ? $relation['dependentProp'] : $relation['principalProp'];
291		$msg = 'Specified unknown-side property ' . $targProperty
292		. ' not found in polymorphic relation map';
293		assert(in_array($targProperty, $targUnknown), $msg);
294
295		$targType = $principalPoly ? 'dependentRSet' : 'principalRSet';
296		$rels[$i][$targType] = $placeholder;
297		continue;
298		}
299		}
300		self::$relationCache = $rels;
301		}
302		return self::$relationCache;
303		}
304
305		private function processRelationLine($line, $entityTypes, &$meta)
306		{
307		$principalType = $line['principalType'];
308		$principalMult = $line['principalMult'];
309		$principalProp = $line['principalProp'];
310		$principalRSet = $line['principalRSet'];
311		$dependentType = $line['dependentType'];
312		$dependentMult = $line['dependentMult'];
313		$dependentProp = $line['dependentProp'];
314		$dependentRSet = $line['dependentRSet'];
315
316		if (!isset($entityTypes[$principalType]) \|\| !isset($entityTypes[$dependentType])) {
317		return;
318		}
319		$principal = $entityTypes[$principalType];
320		$dependent = $entityTypes[$dependentType];
321		$isPoly = static::POLYMORPHIC == $principalRSet \|\| static::POLYMORPHIC == $dependentRSet;
322
323		if ($isPoly) {
324		$this->attachReferencePolymorphic(
325		$meta,
326		$principalMult,
327		$dependentMult,
328		$principal,
329		$dependent,
330		$principalProp,
331		$dependentProp,
332		$principalRSet,
333		$dependentRSet
334		);
335		return null;
336		}
337		$this->attachReferenceNonPolymorphic(
338		$meta,
339		$principalMult,
340		$dependentMult,
341		$principal,
342		$dependent,
343		$principalProp,
344		$dependentProp
345		);
346		return null;
347		}
348
349		/**
350		* @param $meta
351		* @param $principalMult
352		* @param $dependentMult
353		* @param $principal
354		* @param $dependent
355		* @param $principalProp
356		* @param $dependentProp
357		*/
358		private function attachReferenceNonPolymorphic(
359		&$meta,
360		$principalMult,
361		$dependentMult,
362		$principal,
363		$dependent,
364		$principalProp,
365		$dependentProp
366		) {
367		//many-to-many
368		if ('' == $principalMult && '' == $dependentMult) {
369		$meta->addResourceSetReferencePropertyBidirectional(
370		$principal,
371		$dependent,
372		$principalProp,
373		$dependentProp
374		);
375		return;
376		}
377		//one-to-one
378		if ('0..1' == $principalMult \|\| '0..1' == $dependentMult) {
379		assert($principalMult != $dependentMult, 'Cannot have both ends with 0..1 multiplicity');
380		$meta->addResourceReferenceSinglePropertyBidirectional(
381		$principal,
382		$dependent,
383		$principalProp,
384		$dependentProp
385		);
386		return;
387		}
388		assert($principalMult != $dependentMult, 'Cannot have both ends same multiplicity for 1:N relation');
389		//principal-one-to-dependent-many
390		if ('*' == $principalMult) {
391		$meta->addResourceReferencePropertyBidirectional(
392		$principal,
393		$dependent,
394		$principalProp,
395		$dependentProp
396		);
397		return;
398		}
399		//dependent-one-to-principal-many
400		$meta->addResourceReferencePropertyBidirectional(
401		$dependent,
402		$principal,
403		$dependentProp,
404		$principalProp
405		);
406		return;
407		}
408
409		/**
410		* @param $meta
411		* @param $principalMult
412		* @param $dependentMult
413		* @param $principal
414		* @param $dependent
415		* @param $principalProp
416		* @param $dependentProp
417		*/
418		private function attachReferencePolymorphic(
419		&$meta,
420		$principalMult,
421		$dependentMult,
422		$principal,
423		$dependent,
424		$principalProp,
425		$dependentProp,
426		$principalRSet,
427		$dependentRSet
428		) {
429		$prinPoly = static::POLYMORPHIC == $principalRSet;
430		$depPoly = static::POLYMORPHIC == $dependentRSet;
431		$principalSet = (!$prinPoly) ? $principal->getCustomState()
432		: $meta->resolveResourceSet(static::POLYMORPHIC_PLURAL);
433		$dependentSet = (!$depPoly) ? $dependent->getCustomState()
434		: $meta->resolveResourceSet(static::POLYMORPHIC_PLURAL);
435		assert($principalSet instanceof ResourceSet, $principalRSet);
436		assert($dependentSet instanceof ResourceSet, $dependentRSet);
437
438		$isPrincipalAdded = null !== $principal->resolveProperty($principalProp);
439		$isDependentAdded = null !== $dependent->resolveProperty($dependentProp);
440		$prinMany = '*' == $principalMult;
441		$depMany = '*' == $dependentMult;
442
443		if (!$isPrincipalAdded) {
444		if ('*' == $principalMult \|\| $depMany) {
445		$meta->addResourceSetReferenceProperty($principal, $principalProp, $dependentSet);
446		} else {
447		$meta->addResourceReferenceProperty($principal, $principalProp, $dependentSet, $prinPoly, $depMany);
448		}
449		}
450		if (!$isDependentAdded) {
451		if ('*' == $dependentMult \|\| $prinMany) {
452		$meta->addResourceSetReferenceProperty($dependent, $dependentProp, $principalSet);
453		} else {
454		$meta->addResourceReferenceProperty($dependent, $dependentProp, $principalSet, $depPoly, $prinMany);
455		}
456		}
457		return;
458		}
459
460		public function reset()
461		{
462		self::$relationCache = null;
463		self::$rawRelationCache = null;
464		$this->getRelationHolder()->reset();
465		}
466
467		/**
468		* Resolve possible reverse relation property names
469		*
470		* @param Model $source
471		* @param Model $target
472		* @param $propName
473		* @return string\|null
474		*/
475		public function resolveReverseProperty(Model $source, Model $target, $propName)
476		{
477		assert(is_string($propName), 'Property name must be string');
478		$relations = $this->getRepairedRoundTripRelations();
479
480		$sourceName = get_class($source);
481		$targName = get_class($target);
482
483		$filter = function ($segment) use ($sourceName, $targName, $propName) {
484		$match = $sourceName == $segment['principalType'];
485		$match &= $targName == $segment['dependentType'];
486		$match &= $propName == $segment['principalProp'];
487
488		return $match;
489		};
490
491		// array_filter does not reset keys - we have to do it ourselves
492		$trim = array_values(array_filter($relations, $filter));
493		$result = 0 === count($trim) ? null : $trim[0]['dependentProp'];
494
495		return $result;
496		}
497
498		/**
499		* @return MetadataRelationHolder
500		*/
501		public function getRelationHolder()
502		{
503		assert(null !== $this->relationHolder, 'Relation holder must not be null');
504		return $this->relationHolder;
505		}
506		}
507

Algo-Web / POData-Laravel

Pull Request — master (#106)

MetadataProvider::attachReferencePolymorphic() D

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