MetadataRelationsTrait::getCodeForMethod() - Code Metrics - Inspection of "Merge pull request #219 from c-harris/metadataRela..." - Algo-Web/POData-Laravel - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 171614...5fca4d )

by Alex

created 2020-02-25 07:33 UTC

MetadataRelationsTrait::getCodeForMethod() A

↳ Parent: MetadataRelationsTrait

Complexity

Conditions	4
Paths	6

Size

Total Lines	25
Code Lines	18

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
eloc	18
c	0
b	0
f	0
dl	0
loc	25
rs	9.6666
cc	4
nc	6
nop	1

<?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;
                }
                $targetClass = $relation == 'morphTo' ?
                    '\Illuminate\Database\Eloquent\Model|\Eloquent' :
                    '\\' . get_class($relObject);
                $targObject = $biDir ? $relationObj : $targetClass;
                $relToKeyMap = [
                    'morphedByMany' => ['UnknownPolyMorphSide','HasMany'],
                    'morphToMany' => ['KnownPolyMorphSide', 'HasMany'],
                    'morphMany' => ['KnownPolyMorphSide', 'HasMany'],
                    'hasMany' => ['HasMany'],
                    'hasManyThrough' => ['HasMany'],
                    'belongsToMany' => ['HasMany'],
                    'morphOne' => ['KnownPolyMorphSide', 'HasOne'],
                    'hasOne' => ['HasOne'],
                    'belongsTo' => ['HasOne'],
                    'morphTo' => ['UnknownPolyMorphSide'],
                ];
                foreach ($relToKeyMap[$relation] as $key) {
                    $relationships[$key][$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			/**
115			* @param bool $biDir
116			*
117			* @throws InvalidOperationException
118			* @throws \ReflectionException
119			* @return array
120			*/
121			protected function getRelationshipsFromMethods(bool $biDir = false)
122			{
123			$biDirVal = intval($biDir);
124			$isCached = isset(static::$relationCategories[$biDirVal]) && !empty(static::$relationCategories[$biDirVal]);
125			if ($isCached) {
126			return static::$relationCategories[$biDirVal];
127			}
128			/** @var Model $model */
129			$model = $this;
130			$relationships = [
131			'HasOne' => [],
132			'UnknownPolyMorphSide' => [],
133			'HasMany' => [],
134			'KnownPolyMorphSide' => []
135			];
136			$methods = $this->getModelClassMethods($model);
137			foreach ($methods as $method) {
138			//Use reflection to inspect the code, based on Illuminate/Support/SerializableClosure.php
139			$reflection = new \ReflectionMethod($model, $method);
140			$code = $this->getCodeForMethod($reflection);
141			foreach (static::$relTypes as $relation) {
142			//Resolve the relation's model to a Relation object.
143			if (
144			!stripos($code, sprintf('$this->%s(', $relation)) \|\|
145			!(($relationObj = $model->$method()) instanceof Relation) \|\|
146			!in_array(MetadataTrait::class, class_uses($relObject = $relationObj->getRelated()))
147			) {
148			continue;
149			}
150			$targetClass = $relation == 'morphTo' ?
151			'\Illuminate\Database\Eloquent\Model\|\Eloquent' :
152			'\\' . get_class($relObject);
153			$targObject = $biDir ? $relationObj : $targetClass;
154			$relToKeyMap = [
155			'morphedByMany' => ['UnknownPolyMorphSide','HasMany'],
156			'morphToMany' => ['KnownPolyMorphSide', 'HasMany'],
157			'morphMany' => ['KnownPolyMorphSide', 'HasMany'],
158			'hasMany' => ['HasMany'],
159			'hasManyThrough' => ['HasMany'],
160			'belongsToMany' => ['HasMany'],
161			'morphOne' => ['KnownPolyMorphSide', 'HasOne'],
162			'hasOne' => ['HasOne'],
163			'belongsTo' => ['HasOne'],
164			'morphTo' => ['UnknownPolyMorphSide'],
165			];
166			foreach ($relToKeyMap[$relation] as $key) {
167			$relationships[$key][$method] = $targObject;
168			}
169			}
170			}
171			return static::$relationCategories[$biDirVal] = $relationships;
172			}
173
174			/**
175			* @param array $rels
176			* @param array $hooks
177			* @throws InvalidOperationException
178			*/
179			protected function getRelationshipsHasMany(array $rels, array &$hooks)
180			{
181			/**
182			* @var string $property
183			* @var Relation $relation
184			*/
185			foreach ($rels['HasMany'] as $property => $relation) {
186			if ($relation instanceof MorphMany \|\| $relation instanceof MorphToMany) {
187			continue;
188			}
189			$mult = '*';
190			$targ = get_class($relation->getRelated());
191			$keyName = $this->polyglotFkKey($relation);
192			$localName = $this->polyglotRkKey($relation);
193			$thruName = $relation instanceof HasManyThrough ?
194			$this->polyglotThroughKey($relation) :
195			null;
196
197			$first = $keyName;
198			$last = $localName;
199			$this->addRelationsHook($hooks, $first, $property, $last, $mult, $targ, null, $thruName);
200			}
201			}
202
203			/**
204			* @param array $rels
205			* @param array $hooks
206			* @throws InvalidOperationException
207			*/
208			protected function getRelationshipsHasOne(array $rels, array &$hooks)
209			{
210			/**
211			* @var string $property
212			* @var Relation $foo
213			*/
214			foreach ($rels['HasOne'] as $property => $foo) {
215			if ($foo instanceof MorphOne) {
216			continue;
217			}
218			$isBelong = $foo instanceof BelongsTo;
219			$mult = $isBelong ? '1' : '0..1';
220			$targ = get_class($foo->getRelated());
221
222			$keyName = $this->polyglotFkKey($foo);
223			$localName = $this->polyglotRkKey($foo);
224			$first = $isBelong ? $localName : $keyName;
225			$last = $isBelong ? $keyName : $localName;
226			$this->addRelationsHook($hooks, $first, $property, $last, $mult, $targ);
227			}
228			}
229
230			/**
231			* @param array $rels
232			* @param array $hooks
233			* @throws InvalidOperationException
234			*/
235			protected function getRelationshipsKnownPolyMorph(array $rels, array &$hooks)
236			{
237			/**
238			* @var string $property
239			* @var Relation $foo
240			*/
241			foreach ($rels['KnownPolyMorphSide'] as $property => $foo) {
242			$isMany = $foo instanceof MorphToMany;
243			$targ = get_class($foo->getRelated());
244			$mult = $isMany \|\| $foo instanceof MorphMany ? '*' : '1';
245			$mult = $foo instanceof MorphOne ? '0..1' : $mult;
246
247			$keyName = $this->polyglotFkKey($foo);
248			$localName = $this->polyglotRkKey($foo);
249			$first = $isMany ? $keyName : $localName;
250			$last = $isMany ? $localName : $keyName;
251			$this->addRelationsHook($hooks, $first, $property, $last, $mult, $targ, 'unknown');
252			}
253			}
254
255			/**
256			* @param array $rels
257			* @param array $hooks
258			* @throws InvalidOperationException
259			*/
260			protected function getRelationshipsUnknownPolyMorph(array $rels, array &$hooks)
261			{
262			/**
263			* @var string $property
264			* @var Relation $foo
265			*/
266			foreach ($rels['UnknownPolyMorphSide'] as $property => $foo) {
267			$isMany = $foo instanceof MorphToMany;
268			$targ = get_class($foo->getRelated());
269			$mult = $isMany ? '*' : '1';
270
271			$keyName = $this->polyglotFkKey($foo);
272			$localName = $this->polyglotRkKey($foo);
273
274			$first = $keyName;
275			$last = (isset($localName) && '' != $localName) ? $localName : $foo->getRelated()->getKeyName();
276			$this->addRelationsHook($hooks, $first, $property, $last, $mult, $targ, 'known');
277			}
278			}
279
280			/**
281			* @param $hooks
282			* @param $foreignField
283			* @param $RelationName
284			* @param $localKey
285			* @param $mult
286			* @param string\|null $relatedObject
287			* @param mixed\|null $type
288			* @param mixed\|null $through
289			*/
290			protected function addRelationsHook(
291			array &$hooks,
292			$foreignField,
293			$RelationName,
294			$localKey,
295			$mult,
296			$relatedObject,
297			$type = null,
298			$through = null
299			) {
300			if (!isset($hooks[$foreignField])) {
301			$hooks[$foreignField] = [];
302			}
303			if (!isset($hooks[$foreignField][$relatedObject])) {
304			$hooks[$foreignField][$relatedObject] = [];
305			}
306			$hooks[$foreignField][$relatedObject][$RelationName] = [
307			'property' => $RelationName,
308			'local' => $localKey,
309			'through' => $through,
310			'multiplicity' => $mult,
311			'type' => $type
312			];
313			}
314			}
315

Algo-Web / POData-Laravel

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