ReferencedEntityPageIterator::rewind() - Code Metrics - JeroenDeDauw/Replicator - Measure and Improve Code Quality continuously with Scrutinizer

ReferencedEntityPageIterator::rewind() A
last analyzed 2019-04-21 21:30 UTC

↳ Parent: ReferencedEntityPageIterator

Complexity

Conditions	1
Paths	1

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	0
CRAP Score	2

Importance

Changes

Metric	Value
dl	0
loc	4
ccs	0
cts	4
cp	0
rs	10
c	0
b	0
f	0
cc	1
nc	1
nop	0
crap	2

<?php

namespace Queryr\Replicator\EntitySource;

use Deserializers\Deserializer;
use Deserializers\Exceptions\DeserializationException;
use Iterator;
use Queryr\Replicator\Model\EntityPage;
use Wikibase\DataModel\Entity\EntityDocument;
use Wikibase\DataModel\Entity\EntityId;

/**
 * @licence GNU GPL v2+
 * @author Jeroen De Dauw < [email protected] >
 */
class ReferencedEntityPageIterator implements Iterator {

	private $innerIterator;
	private $fetcher;
	private $entityDeserializer;

	/**
	 * @var ReferencedEntitiesFinder
	 */
	private $referencedEntitiesFinder;

	/**
	 * @var string[]
	 */
	private $extraEntitiesToFetch = [];

	public function __construct( Iterator $entityPageIterator, BatchingEntityPageFetcher $fetcher,
			Deserializer $entityDeserializer ) {

		$this->innerIterator = $entityPageIterator;
		$this->fetcher = $fetcher;
		$this->entityDeserializer = $entityDeserializer;

		$this->referencedEntitiesFinder = new ReferencedEntitiesFinder();
	}

	/**
	 * @return EntityPage|null
	 */
	public function current() {
		/**
		 * @var EntityPage|null $page
		 */
		$page = $this->innerIterator->current();

		if ( $page !== null ) {
			$this->addEntitiesReferencedByPage( $page );
		}

		return $page;
	}

	private function addEntitiesReferencedByPage( EntityPage $page ) {
		try {
			/**
			 * @var EntityDocument $entity
			 */
			$entity = $this->entityDeserializer->deserialize( @json_decode( $page->getEntityJson(), true ) );
		}
		catch ( DeserializationException $ex ) {
			return;
		}

		if ( !$this->entityWasFetchedDueToReference( $entity->getId() ) ) {
/** @return stdClass|null */
function mayReturnNull() { }

function doesNotAcceptNull(stdClass $x) { }

// With potential error.
function withoutCheck() {
    $x = mayReturnNull();
    doesNotAcceptNull($x); // Potential error here.
}

// Safe - Alternative 1
function withCheck1() {
    $x = mayReturnNull();
    if ( ! $x instanceof stdClass) {
        throw new \LogicException('$x must be defined.');
    }
    doesNotAcceptNull($x);
}

// Safe - Alternative 2
function withCheck2() {
    $x = mayReturnNull();
    if ($x instanceof stdClass) {
        doesNotAcceptNull($x);
    }
}
			$this->addEntitiesReferencedByEntity( $entity );
		}
	}

	private function entityWasFetchedDueToReference( EntityId $entityId ) {
		return in_array( $entityId->getSerialization(), $this->extraEntitiesToFetch );
	}

	private function addEntitiesReferencedByEntity( EntityDocument $entity ) {
		if ( $entity->getType() !== 'item' ) {
			return;
		}

		$referencedEntities = $this->referencedEntitiesFinder->findForItem( $entity );


		$extraEntitiesToFetch = [];

		foreach ( $referencedEntities as $referencedEntityId ) {
			$extraEntitiesToFetch[] = $referencedEntityId->getSerialization();
		}

		$this->extraEntitiesToFetch = array_merge( $this->extraEntitiesToFetch, $extraEntitiesToFetch );


		$this->fetcher->addPagesToFetch( $extraEntitiesToFetch );

	}

	public function next() {
		$this->innerIterator->next();
	}

	public function key() {
		return $this->innerIterator->key();
	}

	public function valid() {
		return $this->innerIterator->valid();
	}

	public function rewind() {
		$this->next();
		$this->extraEntitiesToFetch = [];
	}

}

1			<?php
2
3			namespace Queryr\Replicator\EntitySource;
4
5			use Deserializers\Deserializer;
6			use Deserializers\Exceptions\DeserializationException;
7			use Iterator;
8			use Queryr\Replicator\Model\EntityPage;
9			use Wikibase\DataModel\Entity\EntityDocument;
10			use Wikibase\DataModel\Entity\EntityId;
11
12			/**
13			* @licence GNU GPL v2+
14			* @author Jeroen De Dauw < [email protected] >
15			*/
16			class ReferencedEntityPageIterator implements Iterator {
17
18			private $innerIterator;
19			private $fetcher;
20			private $entityDeserializer;
21
22			/**
23			* @var ReferencedEntitiesFinder
24			*/
25			private $referencedEntitiesFinder;
26
27			/**
28			* @var string[]
29			*/
30			private $extraEntitiesToFetch = [];
31
32			public function __construct( Iterator $entityPageIterator, BatchingEntityPageFetcher $fetcher,
33			Deserializer $entityDeserializer ) {
34
35			$this->innerIterator = $entityPageIterator;
36			$this->fetcher = $fetcher;
37			$this->entityDeserializer = $entityDeserializer;
38
39			$this->referencedEntitiesFinder = new ReferencedEntitiesFinder();
40			}
41
42			/**
43			* @return EntityPage\|null
44			*/
45			public function current() {
46			/**
47			* @var EntityPage\|null $page
48			*/
49			$page = $this->innerIterator->current();
50
51			if ( $page !== null ) {
52			$this->addEntitiesReferencedByPage( $page );
53			}
54
55			return $page;
56			}
57
58			private function addEntitiesReferencedByPage( EntityPage $page ) {
59			try {
60			/**
61			* @var EntityDocument $entity
62			*/
63			$entity = $this->entityDeserializer->deserialize( @json_decode( $page->getEntityJson(), true ) );
64			}
65			catch ( DeserializationException $ex ) {
66			return;
67			}
68
69			if ( !$this->entityWasFetchedDueToReference( $entity->getId() ) ) {
			0 ignored issues – show Bug introduced 2016-01-02 05:45 UTC by Report Bug Copy Issue Report It seems like `$entity->getId()` can be `null`; however, `entityWasFetchedDueToReference()` does not accept `null`, maybe add an additional type check? Unless you are absolutely sure that the expression can never be null because of other conditions, we strongly recommend to add an additional type check to your code: /** @return stdClass\|null */ function mayReturnNull() { } function doesNotAcceptNull(stdClass $x) { } // With potential error. function withoutCheck() { $x = mayReturnNull(); doesNotAcceptNull($x); // Potential error here. } // Safe - Alternative 1 function withCheck1() { $x = mayReturnNull(); if ( ! $x instanceof stdClass) { throw new \LogicException('$x must be defined.'); } doesNotAcceptNull($x); } // Safe - Alternative 2 function withCheck2() { $x = mayReturnNull(); if ($x instanceof stdClass) { doesNotAcceptNull($x); } } Loading history...
70			$this->addEntitiesReferencedByEntity( $entity );
71			}
72			}
73
74			private function entityWasFetchedDueToReference( EntityId $entityId ) {
75			return in_array( $entityId->getSerialization(), $this->extraEntitiesToFetch );
76			}
77
78			private function addEntitiesReferencedByEntity( EntityDocument $entity ) {
79			if ( $entity->getType() !== 'item' ) {
80			return;
81			}
82
83			$referencedEntities = $this->referencedEntitiesFinder->findForItem( $entity );
			0 ignored issues – show Compatibility introduced 2016-01-02 05:45 UTC by Report Bug Copy Issue Report `$entity` of type `object<Wikibase\DataModel\Entity\EntityDocument>` is not a sub-type of `object<Wikibase\DataModel\Entity\Item>`. It seems like you assume a concrete implementation of the interface `Wikibase\DataModel\Entity\EntityDocument` to be always present. This check looks for parameters that are defined as one type in their type hint or doc comment but seem to be used as a narrower type, i.e an implementation of an interface or a subclass. Consider changing the type of the parameter or doing an instanceof check before assuming your parameter is of the expected type. Loading history...
84
85			$extraEntitiesToFetch = [];
86
87			foreach ( $referencedEntities as $referencedEntityId ) {
88			$extraEntitiesToFetch[] = $referencedEntityId->getSerialization();
89			}
90
91			$this->extraEntitiesToFetch = array_merge( $this->extraEntitiesToFetch, $extraEntitiesToFetch );
			0 ignored issues – show Documentation Bug introduced 2016-01-02 05:45 UTC by Report Bug Copy Issue Report It seems like `array_merge($this->extra... $extraEntitiesToFetch)` of type `array` is incompatible with the declared type `array<integer,string>` of property `$extraEntitiesToFetch`. Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property. Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property.. Loading history...
92
93			$this->fetcher->addPagesToFetch( $extraEntitiesToFetch );
94
95			}
96
97			public function next() {
98			$this->innerIterator->next();
99			}
100
101			public function key() {
102			return $this->innerIterator->key();
103			}
104
105			public function valid() {
106			return $this->innerIterator->valid();
107			}
108
109			public function rewind() {
110			$this->next();
111			$this->extraEntitiesToFetch = [];
112			}
113
114			}

JeroenDeDauw / Replicator

ReferencedEntityPageIterator::rewind() A last analyzed 2019-04-21 21:30 UTC

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ReferencedEntityPageIterator::rewind() A
last analyzed 2019-04-21 21:30 UTC