MetadataRelationsTrait::getRelationshipsUnknownPolyMorph() - Code Metrics - Inspection of "WIP: Metadata relation clean" - Algo-Web/POData-Laravel - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#219)

by Christopher

created 2020-02-24 16:57 UTC

getRelationshipsUnknownPolyMorph() A

↳ Parent: MetadataRelationsTrait

Complexity

Conditions	5
Paths	9

Size

Total Lines	17
Code Lines	9

Duplication

Lines	0
Ratio	0 %

Importance

Changes	2
Bugs	0	Features	0

Metric	Value
eloc	9
c	2
b	0
f	0
dl	0
loc	17
rs	9.6111
cc	5
nc	9
nop	2

<?php
/**
 * Created by PhpStorm.
 * User: alex
 * Date: 13/02/20
 * Time: 1:08 PM.
 */
namespace AlgoWeb\PODataLaravel\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasManyThrough;
use Illuminate\Database\Eloquent\Relations\MorphMany;
use Illuminate\Database\Eloquent\Relations\MorphOne;
use Illuminate\Database\Eloquent\Relations\MorphToMany;
use Illuminate\Database\Eloquent\Relations\Relation;
use POData\Common\InvalidOperationException;

trait MetadataRelationsTrait
{
    use MetadataKeyMethodNamesTrait;

    protected static $relationHooks = [];
    protected static $relationCategories = [];


    /**
     * Get model's relationships.
     *
     * @throws InvalidOperationException
     * @throws \ReflectionException
     * @return array
     */
    public function getRelationships()
    {
        if (empty(static::$relationHooks)) {
            $hooks = [];

            $rels = $this->getRelationshipsFromMethods(true);

            $this->getRelationshipsUnknownPolyMorph($rels, $hooks);

            $this->getRelationshipsKnownPolyMorph($rels, $hooks);

            $this->getRelationshipsHasOne($rels, $hooks);

            $this->getRelationshipsHasMany($rels, $hooks);

            static::$relationHooks = $hooks;
        }

        return static::$relationHooks;
    }

    /**
     * Is this model the known side of at least one polymorphic relation?
     *
     * @throws InvalidOperationException
     * @throws \ReflectionException
     */
    public function isKnownPolymorphSide()
    {
        // isKnownPolymorph needs to be checking KnownPolymorphSide results - if you're checking UnknownPolymorphSide,
        // you're turned around
        $rels = $this->getRelationshipsFromMethods();
        return !empty($rels['KnownPolyMorphSide']);
    }

    /**
     * Is this model on the unknown side of at least one polymorphic relation?
     *
     * @throws InvalidOperationException
     * @throws \ReflectionException
     */
    public function isUnknownPolymorphSide()
    {
        // isUnknownPolymorph needs to be checking UnknownPolymorphSide results - if you're checking KnownPolymorphSide,
        // you're turned around
        $rels = $this->getRelationshipsFromMethods();
        return !empty($rels['UnknownPolyMorphSide']);
    }
    /**
     * @param \ReflectionMethod $method
     * @return string
     * @throws InvalidOperationException
     */
    protected function getCodeForMethod(\ReflectionMethod $method) : string
    {
        $fileName = $method->getFileName();

        $file = new \SplFileObject($fileName);
        $file->seek($method->getStartLine() - 1);
        $code = '';
        while ($file->key() < $method->getEndLine()) {
            $code .= $file->current();
            $file->next();
        }

        $code = trim(preg_replace('/\s\s+/', '', $code));
        if (false === stripos($code, 'function')) {
            $msg = 'Function definition must have keyword \'function\'';
            throw new InvalidOperationException($msg);
        }
        $begin = strpos($code, 'function(');
        $code = substr($code, $begin, strrpos($code, '}') - $begin + 1);
        $lastCode = $code[strlen($code) - 1];
        if ('}' != $lastCode) {
            $msg = 'Final character of function definition must be closing brace';
            throw new InvalidOperationException($msg);
        }
        return $code;
    }
    /**
     * @param bool $biDir
     *
     * @throws InvalidOperationException
     * @throws \ReflectionException
     * @return array
     */
    protected function getRelationshipsFromMethods(bool $biDir = false)
    {
        $biDirVal = intval($biDir);
        $isCached = isset(static::$relationCategories[$biDirVal]) && !empty(static::$relationCategories[$biDirVal]);
        if ($isCached) {
            return static::$relationCategories[$biDirVal];
        }
        /** @var Model $model */
        $model = $this;
        $relationships = [
            'HasOne' => [],
            'UnknownPolyMorphSide' => [],
            'HasMany' => [],
            'KnownPolyMorphSide' => []
        ];
        $methods = $this->getModelClassMethods($model);
        foreach ($methods as $method) {
            //Use reflection to inspect the code, based on Illuminate/Support/SerializableClosure.php
            $reflection = new \ReflectionMethod($model, $method);
            $code = $this->getCodeForMethod($reflection);
            foreach (static::$relTypes as $relation) {
                //Resolve the relation's model to a Relation object.
                if (
                    !stripos($code, sprintf('$this->%s(', $relation)) ||
                    !(($relationObj = $model->$method()) instanceof Relation) ||
                    !in_array(MetadataTrait::class, class_uses($relObject = $relationObj->getRelated()))
                ) {
                    continue;
                }
                $targObject = $biDir ? $relationObj : '\\' . get_class($relObject);
                if (in_array($relation, static::$manyRelTypes)) {
                    //Collection or array of models (because Collection is Arrayable)
                    $relationships['HasMany'][$method] = $targObject;
                } elseif ('morphTo' === $relation) {
                    // Model isn't specified because relation is polymorphic
                    $relationships['UnknownPolyMorphSide'][$method] =
                        $biDir ? $relationObj : '\Illuminate\Database\Eloquent\Model|\Eloquent';
                } else {
                    //Single model is returned
                    $relationships['HasOne'][$method] = $targObject;
                }
                if (in_array($relation, ['morphMany', 'morphOne', 'morphToMany'])) {
                    $relationships['KnownPolyMorphSide'][$method] = $targObject;
                }
                if (in_array($relation, ['morphedByMany'])) {
                    $relationships['UnknownPolyMorphSide'][$method] = $targObject;
                }
            }
        }
        return static::$relationCategories[$biDirVal] = $relationships;
    }

    /**
     * @param  array                     $rels
     * @param  array                     $hooks
     * @throws InvalidOperationException
     */
    protected function getRelationshipsHasMany(array $rels, array &$hooks)
    {
        /**
         * @var string   $property
         * @var Relation $relation
         */
        foreach ($rels['HasMany'] as $property => $relation) {
            if ($relation instanceof MorphMany || $relation instanceof MorphToMany) {
                continue;
            }
            $mult = '*';
            $targ = get_class($relation->getRelated());
            $keyName = $this->polyglotFkKey($relation);
            $localName = $this->polyglotRkKey($relation);
            $thruName = $relation instanceof HasManyThrough ?
                $this->polyglotThroughKey($relation) :
                null;

            $first = $keyName;
            $last = $localName;
            $this->addRelationsHook($hooks, $first, $property, $last, $mult, $targ, null, $thruName);
        }
    }

    /**
     * @param  array                     $rels
     * @param  array                     $hooks
     * @throws InvalidOperationException
     */
    protected function getRelationshipsHasOne(array $rels, array &$hooks)
    {
        /**
         * @var string   $property
         * @var Relation $foo
         */
        foreach ($rels['HasOne'] as $property => $foo) {
            if ($foo instanceof MorphOne) {
                continue;
            }
            $isBelong = $foo instanceof BelongsTo;
            $mult = $isBelong ? '1' : '0..1';
            $targ = get_class($foo->getRelated());

            $keyName = $this->polyglotFkKey($foo);
            $localName = $this->polyglotRkKey($foo);
            $first = $isBelong ? $localName : $keyName;
            $last = $isBelong ? $keyName : $localName;
            $this->addRelationsHook($hooks, $first, $property, $last, $mult, $targ);
        }
    }

    /**
     * @param  array                     $rels
     * @param  array                     $hooks
     * @throws InvalidOperationException
     */
    protected function getRelationshipsKnownPolyMorph(array $rels, array &$hooks)
    {
        /**
         * @var string   $property
         * @var Relation $foo
         */
        foreach ($rels['KnownPolyMorphSide'] as $property => $foo) {
            $isMany = $foo instanceof MorphToMany;
            $targ = get_class($foo->getRelated());
            $mult = $isMany || $foo instanceof MorphMany ? '*' : '1';
            $mult = $foo instanceof MorphOne ? '0..1' : $mult;

            $keyName = $this->polyglotFkKey($foo);
            $localName = $this->polyglotRkKey($foo);
            $first = $isMany ? $keyName : $localName;
            $last = $isMany ? $localName : $keyName;
            $this->addRelationsHook($hooks, $first, $property, $last, $mult, $targ, 'unknown');
        }
    }

    /**
     * @param  array                     $rels
     * @param  array                     $hooks
     * @throws InvalidOperationException
     */
    protected function getRelationshipsUnknownPolyMorph(array $rels, array &$hooks)
    {
        /**
         * @var string   $property
         * @var Relation $foo
         */
        foreach ($rels['UnknownPolyMorphSide'] as $property => $foo) {
            $isMany = $foo instanceof MorphToMany;
            $targ = get_class($foo->getRelated());
            $mult = $isMany ? '*' : '1';

            $keyName = $this->polyglotFkKey($foo);
            $localName = $this->polyglotRkKey($foo);

            $first = $keyName;
            $last = (isset($localName) && '' != $localName) ? $localName : $foo->getRelated()->getKeyName();
            $this->addRelationsHook($hooks, $first, $property, $last, $mult, $targ, 'known');
        }
    }

    /**
     * @param             $hooks
     * @param             $foreignField
     * @param             $RelationName
     * @param             $localKey
     * @param             $mult
     * @param string|null $relatedObject
     * @param mixed|null  $type
     * @param mixed|null  $through
     */
    protected function addRelationsHook(
        array &$hooks,
        $foreignField,
        $RelationName,
        $localKey,
        $mult,
        $relatedObject,
        $type = null,
        $through = null
    ) {
        if (!isset($hooks[$foreignField])) {
            $hooks[$foreignField] = [];
        }
        if (!isset($hooks[$foreignField][$relatedObject])) {
            $hooks[$foreignField][$relatedObject] = [];
        }
        $hooks[$foreignField][$relatedObject][$RelationName] = [
            'property' => $RelationName,
            'local' => $localKey,
            'through' => $through,
            'multiplicity' => $mult,
            'type' => $type
        ];
    }
}


1			<?php
2			/**
3			* Created by PhpStorm.
4			* User: alex
5			* Date: 13/02/20
6			* Time: 1:08 PM.
7			*/
8			namespace AlgoWeb\PODataLaravel\Models;
9
10			use Illuminate\Database\Eloquent\Model;
11			use Illuminate\Database\Eloquent\Relations\BelongsTo;
12			use Illuminate\Database\Eloquent\Relations\HasManyThrough;
13			use Illuminate\Database\Eloquent\Relations\MorphMany;
14			use Illuminate\Database\Eloquent\Relations\MorphOne;
15			use Illuminate\Database\Eloquent\Relations\MorphToMany;
16			use Illuminate\Database\Eloquent\Relations\Relation;
17			use POData\Common\InvalidOperationException;
18
19			trait MetadataRelationsTrait
20			{
21			use MetadataKeyMethodNamesTrait;
22
23			protected static $relationHooks = [];
24			protected static $relationCategories = [];
25
26
27			/**
28			* Get model's relationships.
29			*
30			* @throws InvalidOperationException
31			* @throws \ReflectionException
32			* @return array
33			*/
34			public function getRelationships()
35			{
36			if (empty(static::$relationHooks)) {
37			$hooks = [];
38
39			$rels = $this->getRelationshipsFromMethods(true);
40
41			$this->getRelationshipsUnknownPolyMorph($rels, $hooks);
42
43			$this->getRelationshipsKnownPolyMorph($rels, $hooks);
44
45			$this->getRelationshipsHasOne($rels, $hooks);
46
47			$this->getRelationshipsHasMany($rels, $hooks);
48
49			static::$relationHooks = $hooks;
50			}
51
52			return static::$relationHooks;
53			}
54
55			/**
56			* Is this model the known side of at least one polymorphic relation?
57			*
58			* @throws InvalidOperationException
59			* @throws \ReflectionException
60			*/
61			public function isKnownPolymorphSide()
62			{
63			// isKnownPolymorph needs to be checking KnownPolymorphSide results - if you're checking UnknownPolymorphSide,
64			// you're turned around
65			$rels = $this->getRelationshipsFromMethods();
66			return !empty($rels['KnownPolyMorphSide']);
67			}
68
69			/**
70			* Is this model on the unknown side of at least one polymorphic relation?
71			*
72			* @throws InvalidOperationException
73			* @throws \ReflectionException
74			*/
75			public function isUnknownPolymorphSide()
76			{
77			// isUnknownPolymorph needs to be checking UnknownPolymorphSide results - if you're checking KnownPolymorphSide,
78			// you're turned around
79			$rels = $this->getRelationshipsFromMethods();
80			return !empty($rels['UnknownPolyMorphSide']);
81			}
82			/**
83			* @param \ReflectionMethod $method
84			* @return string
85			* @throws InvalidOperationException
86			*/
87			protected function getCodeForMethod(\ReflectionMethod $method) : string
88			{
89			$fileName = $method->getFileName();
90
91			$file = new \SplFileObject($fileName);
92			$file->seek($method->getStartLine() - 1);
93			$code = '';
94			while ($file->key() < $method->getEndLine()) {
95			$code .= $file->current();
96			$file->next();
97			}
98
99			$code = trim(preg_replace('/\s\s+/', '', $code));
100			if (false === stripos($code, 'function')) {
101			$msg = 'Function definition must have keyword \'function\'';
102			throw new InvalidOperationException($msg);
103			}
104			$begin = strpos($code, 'function(');
105			$code = substr($code, $begin, strrpos($code, '}') - $begin + 1);
106			$lastCode = $code[strlen($code) - 1];
107			if ('}' != $lastCode) {
108			$msg = 'Final character of function definition must be closing brace';
109			throw new InvalidOperationException($msg);
110			}
111			return $code;
112			}
113			/**
114			* @param bool $biDir
115			*
116			* @throws InvalidOperationException
117			* @throws \ReflectionException
118			* @return array
119			*/
120			protected function getRelationshipsFromMethods(bool $biDir = false)
121			{
122			$biDirVal = intval($biDir);
123			$isCached = isset(static::$relationCategories[$biDirVal]) && !empty(static::$relationCategories[$biDirVal]);
124			if ($isCached) {
125			return static::$relationCategories[$biDirVal];
126			}
127			/** @var Model $model */
128			$model = $this;
129			$relationships = [
130			'HasOne' => [],
131			'UnknownPolyMorphSide' => [],
132			'HasMany' => [],
133			'KnownPolyMorphSide' => []
134			];
135			$methods = $this->getModelClassMethods($model);
136			foreach ($methods as $method) {
137			//Use reflection to inspect the code, based on Illuminate/Support/SerializableClosure.php
138			$reflection = new \ReflectionMethod($model, $method);
139			$code = $this->getCodeForMethod($reflection);
140			foreach (static::$relTypes as $relation) {
141			//Resolve the relation's model to a Relation object.
142			if (
143			!stripos($code, sprintf('$this->%s(', $relation)) \|\|
144			!(($relationObj = $model->$method()) instanceof Relation) \|\|
145			!in_array(MetadataTrait::class, class_uses($relObject = $relationObj->getRelated()))
146			) {
147			continue;
148			}
149			$targObject = $biDir ? $relationObj : '\\' . get_class($relObject);
150			if (in_array($relation, static::$manyRelTypes)) {
151			//Collection or array of models (because Collection is Arrayable)
152			$relationships['HasMany'][$method] = $targObject;
153			} elseif ('morphTo' === $relation) {
154			// Model isn't specified because relation is polymorphic
155			$relationships['UnknownPolyMorphSide'][$method] =
156			$biDir ? $relationObj : '\Illuminate\Database\Eloquent\Model\|\Eloquent';
157			} else {
158			//Single model is returned
159			$relationships['HasOne'][$method] = $targObject;
160			}
161			if (in_array($relation, ['morphMany', 'morphOne', 'morphToMany'])) {
162			$relationships['KnownPolyMorphSide'][$method] = $targObject;
163			}
164			if (in_array($relation, ['morphedByMany'])) {
165			$relationships['UnknownPolyMorphSide'][$method] = $targObject;
166			}
167			}
168			}
169			return static::$relationCategories[$biDirVal] = $relationships;
170			}
171
172			/**
173			* @param array $rels
174			* @param array $hooks
175			* @throws InvalidOperationException
176			*/
177			protected function getRelationshipsHasMany(array $rels, array &$hooks)
178			{
179			/**
180			* @var string $property
181			* @var Relation $relation
182			*/
183			foreach ($rels['HasMany'] as $property => $relation) {
184			if ($relation instanceof MorphMany \|\| $relation instanceof MorphToMany) {
185			continue;
186			}
187			$mult = '*';
188			$targ = get_class($relation->getRelated());
189			$keyName = $this->polyglotFkKey($relation);
190			$localName = $this->polyglotRkKey($relation);
191			$thruName = $relation instanceof HasManyThrough ?
192			$this->polyglotThroughKey($relation) :
193			null;
194
195			$first = $keyName;
196			$last = $localName;
197			$this->addRelationsHook($hooks, $first, $property, $last, $mult, $targ, null, $thruName);
198			}
199			}
200
201			/**
202			* @param array $rels
203			* @param array $hooks
204			* @throws InvalidOperationException
205			*/
206			protected function getRelationshipsHasOne(array $rels, array &$hooks)
207			{
208			/**
209			* @var string $property
210			* @var Relation $foo
211			*/
212			foreach ($rels['HasOne'] as $property => $foo) {
213			if ($foo instanceof MorphOne) {
214			continue;
215			}
216			$isBelong = $foo instanceof BelongsTo;
217			$mult = $isBelong ? '1' : '0..1';
218			$targ = get_class($foo->getRelated());
219
220			$keyName = $this->polyglotFkKey($foo);
221			$localName = $this->polyglotRkKey($foo);
222			$first = $isBelong ? $localName : $keyName;
223			$last = $isBelong ? $keyName : $localName;
224			$this->addRelationsHook($hooks, $first, $property, $last, $mult, $targ);
225			}
226			}
227
228			/**
229			* @param array $rels
230			* @param array $hooks
231			* @throws InvalidOperationException
232			*/
233			protected function getRelationshipsKnownPolyMorph(array $rels, array &$hooks)
234			{
235			/**
236			* @var string $property
237			* @var Relation $foo
238			*/
239			foreach ($rels['KnownPolyMorphSide'] as $property => $foo) {
240			$isMany = $foo instanceof MorphToMany;
241			$targ = get_class($foo->getRelated());
242			$mult = $isMany \|\| $foo instanceof MorphMany ? '*' : '1';
243			$mult = $foo instanceof MorphOne ? '0..1' : $mult;
244
245			$keyName = $this->polyglotFkKey($foo);
246			$localName = $this->polyglotRkKey($foo);
247			$first = $isMany ? $keyName : $localName;
248			$last = $isMany ? $localName : $keyName;
249			$this->addRelationsHook($hooks, $first, $property, $last, $mult, $targ, 'unknown');
250			}
251			}
252
253			/**
254			* @param array $rels
255			* @param array $hooks
256			* @throws InvalidOperationException
257			*/
258			protected function getRelationshipsUnknownPolyMorph(array $rels, array &$hooks)
259			{
260			/**
261			* @var string $property
262			* @var Relation $foo
263			*/
264			foreach ($rels['UnknownPolyMorphSide'] as $property => $foo) {
265			$isMany = $foo instanceof MorphToMany;
266			$targ = get_class($foo->getRelated());
267			$mult = $isMany ? '*' : '1';
268
269			$keyName = $this->polyglotFkKey($foo);
270			$localName = $this->polyglotRkKey($foo);
271
272			$first = $keyName;
273			$last = (isset($localName) && '' != $localName) ? $localName : $foo->getRelated()->getKeyName();
274			$this->addRelationsHook($hooks, $first, $property, $last, $mult, $targ, 'known');
275			}
276			}
277
278			/**
279			* @param $hooks
280			* @param $foreignField
281			* @param $RelationName
282			* @param $localKey
283			* @param $mult
284			* @param string\|null $relatedObject
285			* @param mixed\|null $type
286			* @param mixed\|null $through
287			*/
288			protected function addRelationsHook(
289			array &$hooks,
290			$foreignField,
291			$RelationName,
292			$localKey,
293			$mult,
294			$relatedObject,
295			$type = null,
296			$through = null
297			) {
298			if (!isset($hooks[$foreignField])) {
299			$hooks[$foreignField] = [];
300			}
301			if (!isset($hooks[$foreignField][$relatedObject])) {
302			$hooks[$foreignField][$relatedObject] = [];
303			}
304			$hooks[$foreignField][$relatedObject][$RelationName] = [
305			'property' => $RelationName,
306			'local' => $localKey,
307			'through' => $through,
308			'multiplicity' => $mult,
309			'type' => $type
310			];
311			}
312			}
313

Algo-Web / POData-Laravel

Pull Request — master (#219)

getRelationshipsUnknownPolyMorph() A

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