ApcuCache::getMultiple() - Code Metrics - Inspection of "Add namespace prefix and default lifetime" - paillechat/apcu-simple-cache - Measure and Improve Code Quality continuously with Scrutinizer

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by Ilya

created 2017-05-31 09:48 UTC

ApcuCache::getMultiple() B

↳ Parent: ApcuCache

Complexity

Conditions	5
Paths	4

Size

Total Lines	22
Code Lines	12

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	14
CRAP Score	5

Importance

Changes

Metric	Value
dl	0
loc	22
ccs	14
cts	14
cp	1
rs	8.6737
c	0
b	0
f	0
cc	5
eloc	12
nc	4
nop	2
crap	5

<?php

namespace Paillechat\ApcuSimpleCache;

use Paillechat\ApcuSimpleCache\Exception\ApcuInvalidCacheKeyException;
use Psr\SimpleCache\CacheInterface;

class ApcuCache implements CacheInterface
{
    /**
     * @var string
     */
    private $namespace;
    /**
     * @var int
     */
    private $defaultLifetime;

    public function __construct($namespace = '', $defaultLifetime = 0)
    {
        $this->namespace = $namespace;
        $this->defaultLifetime = $defaultLifetime;
    }

    /**
     * {@inheritdoc}
     */
    public function get($key, $default = null)
    {
        $this->assertKeyName($key);
        $key = $this->buildKeyName($key);

        return apcu_fetch($key) ?:$default;
    }

    /**
     * {@inheritdoc}
     */
    public function set($key, $value, $ttl = null)
    {
        $this->assertKeyName($key);
        $key = $this->buildKeyName($key);

        $ttl = is_null($ttl) ? $this->defaultLifetime : $ttl;

        return apcu_store($key, $value, (int) $ttl);

    }

    /**
     * {@inheritdoc}
     */
    public function delete($key)
    {
        $this->assertKeyName($key);
        $key = $this->buildKeyName($key);

        return apcu_delete($key);

    }

    /**
     * {@inheritdoc}
     */
    public function clear()
    {
        return apcu_clear_cache();
    }

    /**
     * {@inheritdoc}
     */
    public function getMultiple($keys, $default = null)
    {
        $this->assertKeyNames($keys);
        $keys = $this->buildKeyNames($keys);

        $result = apcu_fetch($keys);

        if (!is_null($default) && is_array($result) && count($keys) > count($result)) {
            $notFoundKeys = array_diff($keys, array_keys($result));
            $result = array_merge($result, array_fill_keys($notFoundKeys, $default));
        }

        $mappedResult = [];

        foreach ($result as $key => $value) {
            $key = preg_replace("/^$this->namespace/", '', $key);

            $mappedResult[$key] = $value;
        }

        return $mappedResult;
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
    }

    /**
     * {@inheritdoc}
     */
    public function setMultiple($values, $ttl = null)
    {
        $this->assertKeyNames(array_keys($values));

        $mappedByNamespaceValues = [];

        foreach ($values as $key => $value) {
            $mappedByNamespaceValues[$this->buildKeyName($key)] = $value;
        }

        $ttl = is_null($ttl) ? $this->defaultLifetime : $ttl;

        $result = apcu_store($mappedByNamespaceValues, (int) $ttl);

        return $result === true ? true : (is_array($result) && count($result) == 0 ? true: false);
    }

    /**
     * {@inheritdoc}
     */
    public function deleteMultiple($keys)
    {
        $this->assertKeyNames($keys);
        $keys = $this->buildKeyNames($keys);

        $result = apcu_delete($keys);

        return count($result) === count($keys) ? false : true;
    }

    /**
     * {@inheritdoc}
     */
    public function has($key)
    {
        $this->assertKeyName($key);
        $key = $this->buildKeyName($key);

        return apcu_exists($key);

    }

    /**
     * @param string $key
     *
     * @return string
     */
    private function buildKeyName($key)
    {
        return $this->namespace . $key;
    }

    /**
     * @param string[] $keys
     *
     * @return string[]
     */
    private function buildKeyNames(array $keys)
    {
        return array_map(function($key) {
            return $this->buildKeyName($key);
        }, $keys);

    }

    /**
     * @param mixed $key
     *
     * @throws ApcuInvalidCacheKeyException
     */
    private function assertKeyName($key)
    {
        if (!is_string($key)) {
            throw new ApcuInvalidCacheKeyException();
        }
    }

    /**
     * @param string[] $keys
     *
     * @throws ApcuInvalidCacheKeyException
     */
    private function assertKeyNames(array $keys)
    {
        array_map(function ($value) {
            $this->assertKeyName($value);
        }, $keys);
    }
}


1		<?php
2
3		namespace Paillechat\ApcuSimpleCache;
4
5		use Paillechat\ApcuSimpleCache\Exception\ApcuInvalidCacheKeyException;
6		use Psr\SimpleCache\CacheInterface;
7
8		class ApcuCache implements CacheInterface
9		{
10		/**
11		* @var string
12		*/
13		private $namespace;
14		/**
15		* @var int
16		*/
17		private $defaultLifetime;
18
19	20	public function __construct($namespace = '', $defaultLifetime = 0)
20		{
21	20	$this->namespace = $namespace;
22	20	$this->defaultLifetime = $defaultLifetime;
23	20	}
24
25		/**
26		* {@inheritdoc}
27		*/
28	16	public function get($key, $default = null)
29		{
30	16	$this->assertKeyName($key);
31	2	$key = $this->buildKeyName($key);
32
33	2	return apcu_fetch($key) ?:$default;
34		}
35
36		/**
37		* {@inheritdoc}
38		*/
39	2	public function set($key, $value, $ttl = null)
40		{
41	2	$this->assertKeyName($key);
42	2	$key = $this->buildKeyName($key);
43
44	2	$ttl = is_null($ttl) ? $this->defaultLifetime : $ttl;
45
46	2	return apcu_store($key, $value, (int) $ttl);
		0 ignored issues – show Bug Compatibility introduced 2017-05-30 16:48 UTC by Report Bug Copy Issue Report The expression `apcu_store($key, $value, (int) $ttl);` of type `boolean\|array` adds the type `array` to the return on line 46 which is incompatible with the return type declared by the interface `Psr\SimpleCache\CacheInterface::set` of type `boolean`. Loading history...
47		}
48
49		/**
50		* {@inheritdoc}
51		*/
52	2	public function delete($key)
53		{
54	2	$this->assertKeyName($key);
55	2	$key = $this->buildKeyName($key);
56
57	2	return apcu_delete($key);
		0 ignored issues – show Bug Compatibility introduced 2017-05-30 16:48 UTC by Report Bug Copy Issue Report The expression `apcu_delete($key);` of type `boolean\|string[]` adds the type `string[]` to the return on line 57 which is incompatible with the return type declared by the interface `Psr\SimpleCache\CacheInterface::delete` of type `boolean`. Loading history...
58		}
59
60		/**
61		* {@inheritdoc}
62		*/
63	4	public function clear()
64		{
65	4	return apcu_clear_cache();
66		}
67
68		/**
69		* {@inheritdoc}
70		*/
71	2	public function getMultiple($keys, $default = null)
72		{
73	2	$this->assertKeyNames($keys);
74	2	$keys = $this->buildKeyNames($keys);
75
76	2	$result = apcu_fetch($keys);
77
78	2	if (!is_null($default) && is_array($result) && count($keys) > count($result)) {
79	2	$notFoundKeys = array_diff($keys, array_keys($result));
80	2	$result = array_merge($result, array_fill_keys($notFoundKeys, $default));
81	1	}
82
83	2	$mappedResult = [];
84
85	2	foreach ($result as $key => $value) {
86	2	$key = preg_replace("/^$this->namespace/", '', $key);
87
88	2	$mappedResult[$key] = $value;
89	1	}
90
91	2	return $mappedResult;
		0 ignored issues – show Bug Best Practice introduced 2017-05-31 09:46 UTC by Report Bug Copy Issue Report The return type of `return $mappedResult;` (`array`) is incompatible with the return type declared by the interface `Psr\SimpleCache\CacheInterface::getMultiple` of type `Psr\SimpleCache\iterable`. If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design. Let’s take a look at an example: class Author { private $name; public function __construct($name) { $this->name = $name; } public function getName() { return $this->name; } } abstract class Post { public function getAuthor() { return 'Johannes'; } } class BlogPost extends Post { public function getAuthor() { return new Author('Johannes'); } } class ForumPost extends Post { /* ... */ } function my_function(Post $post) { echo strtoupper($post->getAuthor()); } Our function `my_function` expects a `Post` object, and outputs the author of the post. The base class `Post` returns a simple string and outputting a simple string will work just fine. However, the child class `BlogPost` which is a sub-type of `Post` instead decided to return an `object`, and is therefore violating the SOLID principles. If a `BlogPost` were passed to `my_function`, PHP would not complain, but ultimately fail when executing the `strtoupper` call in its body. Loading history...
92		}
93
94		/**
95		* {@inheritdoc}
96		*/
97	2	public function setMultiple($values, $ttl = null)
98		{
99	2	$this->assertKeyNames(array_keys($values));
100
101	2	$mappedByNamespaceValues = [];
102
103	2	foreach ($values as $key => $value) {
104	2	$mappedByNamespaceValues[$this->buildKeyName($key)] = $value;
105	1	}
106
107	2	$ttl = is_null($ttl) ? $this->defaultLifetime : $ttl;
108
109	2	$result = apcu_store($mappedByNamespaceValues, (int) $ttl);
110
111	2	return $result === true ? true : (is_array($result) && count($result) == 0 ? true: false);
112		}
113
114		/**
115		* {@inheritdoc}
116		*/
117	2	public function deleteMultiple($keys)
118		{
119	2	$this->assertKeyNames($keys);
120	2	$keys = $this->buildKeyNames($keys);
121
122	2	$result = apcu_delete($keys);
123
124	2	return count($result) === count($keys) ? false : true;
125		}
126
127		/**
128		* {@inheritdoc}
129		*/
130	4	public function has($key)
131		{
132	4	$this->assertKeyName($key);
133	4	$key = $this->buildKeyName($key);
134
135	4	return apcu_exists($key);
		0 ignored issues – show Bug Compatibility introduced 2017-05-31 09:46 UTC by Report Bug Copy Issue Report The expression `apcu_exists($key);` of type `boolean\|string[]` adds the type `string[]` to the return on line 135 which is incompatible with the return type declared by the interface `Psr\SimpleCache\CacheInterface::has` of type `boolean`. Loading history...
136		}
137
138		/**
139		* @param string $key
140		*
141		* @return string
142		*/
143	4	private function buildKeyName($key)
144		{
145	4	return $this->namespace . $key;
146		}
147
148		/**
149		* @param string[] $keys
150		*
151		* @return string[]
152		*/
153	2	private function buildKeyNames(array $keys)
154		{
155		return array_map(function($key) {
156	2	return $this->buildKeyName($key);
157	2	}, $keys);
158
159		}
160
161		/**
162		* @param mixed $key
163		*
164		* @throws ApcuInvalidCacheKeyException
165		*/
166	18	private function assertKeyName($key)
167		{
168	18	if (!is_string($key)) {
169	14	throw new ApcuInvalidCacheKeyException();
170		}
171	4	}
172
173		/**
174		* @param string[] $keys
175		*
176		* @throws ApcuInvalidCacheKeyException
177		*/
178		private function assertKeyNames(array $keys)
179		{
180	2	array_map(function ($value) {
181	2	$this->assertKeyName($value);
182	2	}, $keys);
183	2	}
184		}
185

paillechat / apcu-simple-cache

Push — master ( 798b29...af14f0 )

ApcuCache::getMultiple() B

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