ApcuCache::clear() - Code Metrics - Inspection of "Cleanup" - yiisoft/cache-apcu - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — master (#16)

by Evgeniy

created 2020-12-25 10:23 UTC

ApcuCache::clear() A

↳ Parent: ApcuCache

Complexity

Conditions	1
Paths	1

Size

Total Lines	3
Code Lines	1

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	0
CRAP Score	2

Importance

Changes

Metric	Value
eloc	1
dl	0
loc	3
ccs	0
cts	2
cp	0
rs	10
c	0
b	0
f	0
cc	1
nc	1
nop	0
crap	2

<?php

declare(strict_types=1);

namespace Yiisoft\Cache\Apcu;

use DateInterval;
use DateTime;
use Traversable;
use Psr\SimpleCache\CacheInterface;
filter:
    dependency_paths: ["lib/*"]

use function apcu_delete;
use function apcu_clear_cache;
use function apcu_exists;
use function apcu_fetch;
use function apcu_store;
use function array_fill_keys;
use function array_keys;
use function array_map;
use function gettype;
use function is_int;
use function is_iterable;
use function is_string;
use function iterator_to_array;
use function strpbrk;

/**
 * ApcuCache provides APCu caching in terms of an application component.
 *
 * To use this application component, the [APCu PHP extension](http://www.php.net/apcu) must be loaded.
 * In order to enable APCu for CLI you should add "apc.enable_cli = 1" to your php.ini.
 *
 * See {@see \Psr\SimpleCache\CacheInterface} for common cache operations that ApcCache supports.
 */
final class ApcuCache implements CacheInterface
{
    private const TTL_INFINITY = 0;

    public function get($key, $default = null)
    {
        $this->validateKey($key);
        $value = apcu_fetch($key, $success);
        return $success ? $value : $default;
    }

    public function set($key, $value, $ttl = null): bool
    {
        $this->validateKey($key);
        $ttl = $this->normalizeTtl($ttl);

        if ($ttl < 0) {
            return $this->delete($key);
        }

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

    }

    public function delete($key): bool
    {
        $this->validateKey($key);
        return apcu_delete($key);

    }

    public function clear(): bool
    {
        return apcu_clear_cache();
    }

    public function getMultiple($keys, $default = null): iterable
    {
        $keys = $this->iterableToArray($keys);
        $this->validateKeys($keys);
        $values = array_fill_keys($keys, $default);

        if (($valuesFromCache = apcu_fetch($keys)) === false) {
            return $values;
        }

        $valuesFromCache = $this->normalizeAPCuOutput($valuesFromCache);

        foreach ($values as $key => $value) {
            $values[$key] = $valuesFromCache[(string) $key] ?? $value;
        }

        return $values;
    }

    public function setMultiple($values, $ttl = null): bool
    {
        $ttl = $this->normalizeTtl($ttl);
        $values = $this->iterableToArray($values);
        $this->validateKeysOfValues($values);
        [$valuesWithStringKeys, $valuesWithIntegerKeys] = $this->splitValuesByKeyType($values);

        /** @psalm-suppress RedundantCondition */
        if (apcu_store($valuesWithStringKeys, null, $ttl) !== []) {
            return false;
        }

        foreach ($valuesWithIntegerKeys as $key => $value) {
            if (!apcu_store((string) $key, $value, $ttl)) {
                return false;
            }
        }

        return true;
    }

    public function deleteMultiple($keys): bool
    {
        $keys = $this->iterableToArray($keys);
        $this->validateKeys($keys);
        return apcu_delete($keys) === [];
    }

    public function has($key): bool
    {
        $this->validateKey($key);
        return apcu_exists($key);

    }

    /**
     * Normalizes cache TTL handling `null` value, strings and {@see DateInterval} objects.
     *
     * @param DateInterval|int|string|null $ttl The raw TTL.
     *
     * @return int TTL value as UNIX timestamp.
     */
    private function normalizeTtl($ttl): int
    {
        if ($ttl === null) {
            return self::TTL_INFINITY;
        }

        if ($ttl instanceof DateInterval) {
            return (new DateTime('@0'))->add($ttl)->getTimestamp();
        }

        return (int) $ttl;
    }

    /**
     * Converts iterable to array. If provided value is not iterable it throws an InvalidArgumentException.
     *
     * @param mixed $iterable
     *
     * @return array
     */
    private function iterableToArray($iterable): array
    {
        if (!is_iterable($iterable)) {
            throw new InvalidArgumentException('Iterable is expected, got ' . gettype($iterable));
        }

        /** @psalm-suppress RedundantCast */
        return $iterable instanceof Traversable ? iterator_to_array($iterable) : (array) $iterable;
    }

    /**
     * @param mixed $key
     */
    private function validateKey($key): void
    {
        if (!is_string($key) || $key === '' || strpbrk($key, '{}()/\@:')) {
            throw new InvalidArgumentException('Invalid key value.');
        }
    }

    /**
     * @param array $keys
     */
    private function validateKeys(array $keys): void
    {
        foreach ($keys as $key) {
            $this->validateKey($key);
        }
    }

    /**
     * @param array $values
     */
    private function validateKeysOfValues(array $values): void
    {
        $keys = array_map('strval', array_keys($values));
        $this->validateKeys($keys);
    }

    /**
     * Normalizes keys returned from apcu_fetch in multiple mode. If one of the keys is an integer (123) or a string
     * representation of an integer ('123') the returned key from the cache doesn't equal neither to an integer nor a
     * string ($key !== 123 and $key !== '123'). Coping element from the returned array one by one to the new array
     * fixes this issue.
     *
     * @param array $values
     *
     * @return array
     */
    private function normalizeAPCuOutput(array $values): array
    {
        $normalizedValues = [];

        foreach ($values as $key => $value) {
            $normalizedValues[$key] = $value;
        }

        return $normalizedValues;
    }

    /**
     * Splits the array of values into two arrays, one with int keys and one with string keys
     *
     * @param array $values
     *
     * @return array
     */
    private function splitValuesByKeyType(array $values): array
    {
        $withIntKeys = [];

        foreach ($values as $key => $value) {
            if (is_int($key)) {
                $withIntKeys[$key] = $value;
                unset($values[$key]);
            }
        }

        return [$values, $withIntKeys];
    }
}


1			<?php
2
3			declare(strict_types=1);
4
5			namespace Yiisoft\Cache\Apcu;
6
7			use DateInterval;
8			use DateTime;
9			use Traversable;
10			use Psr\SimpleCache\CacheInterface;
			0 ignored issues – show Bug introduced 2020-12-25 10:25 UTC by Report Bug Copy Issue Report The type `Psr\SimpleCache\CacheInterface` was not found. Maybe you did not declare it correctly or list all dependencies? The issue could also be caused by a filter entry in the build configuration. If the path has been excluded in your configuration, e.g. `excluded_paths: ["lib/"]`, you can move it to the dependency path list as follows: filter: dependency_paths: ["lib/"] For further information see https://scrutinizer-ci.com/docs/tools/php/php-scrutinizer/#list-dependency-paths Loading history...
11
12			use function apcu_delete;
13			use function apcu_clear_cache;
14			use function apcu_exists;
15			use function apcu_fetch;
16			use function apcu_store;
17			use function array_fill_keys;
18			use function array_keys;
19			use function array_map;
20			use function gettype;
21			use function is_int;
22			use function is_iterable;
23			use function is_string;
24			use function iterator_to_array;
25			use function strpbrk;
26
27			/**
28			* ApcuCache provides APCu caching in terms of an application component.
29			*
30			* To use this application component, the [APCu PHP extension](http://www.php.net/apcu) must be loaded.
31			* In order to enable APCu for CLI you should add "apc.enable_cli = 1" to your php.ini.
32			*
33			* See {@see \Psr\SimpleCache\CacheInterface} for common cache operations that ApcCache supports.
34			*/
35			final class ApcuCache implements CacheInterface
36			{
37			private const TTL_INFINITY = 0;
38
39			public function get($key, $default = null)
40			{
41			$this->validateKey($key);
42			$value = apcu_fetch($key, $success);
43			return $success ? $value : $default;
44			}
45
46			public function set($key, $value, $ttl = null): bool
47			{
48			$this->validateKey($key);
49			$ttl = $this->normalizeTtl($ttl);
50
51			if ($ttl < 0) {
52			return $this->delete($key);
53			}
54
55			return apcu_store($key, $value, $ttl);
			0 ignored issues – show Bug Best Practice introduced 2019-08-13 13:04 UTC by Report Bug Copy Issue Report The expression `return apcu_store($key, $value, $ttl)` could return the type `array` which is incompatible with the type-hinted return `boolean`. Consider adding an additional type-check to rule them out. Loading history...
56			}
57
58			public function delete($key): bool
59			{
60			$this->validateKey($key);
61			return apcu_delete($key);
			0 ignored issues – show Bug Best Practice introduced 2019-08-23 10:47 UTC by Report Bug Copy Issue Report The expression `return apcu_delete($key)` could return the type `string[]` which is incompatible with the type-hinted return `boolean`. Consider adding an additional type-check to rule them out. Loading history...
62			}
63
64			public function clear(): bool
65			{
66			return apcu_clear_cache();
67			}
68
69			public function getMultiple($keys, $default = null): iterable
70			{
71			$keys = $this->iterableToArray($keys);
72			$this->validateKeys($keys);
73			$values = array_fill_keys($keys, $default);
74
75			if (($valuesFromCache = apcu_fetch($keys)) === false) {
76			return $values;
77			}
78
79			$valuesFromCache = $this->normalizeAPCuOutput($valuesFromCache);
80
81			foreach ($values as $key => $value) {
82			$values[$key] = $valuesFromCache[(string) $key] ?? $value;
83			}
84
85			return $values;
86			}
87
88			public function setMultiple($values, $ttl = null): bool
89			{
90			$ttl = $this->normalizeTtl($ttl);
91			$values = $this->iterableToArray($values);
92			$this->validateKeysOfValues($values);
93			[$valuesWithStringKeys, $valuesWithIntegerKeys] = $this->splitValuesByKeyType($values);
94
95			/** @psalm-suppress RedundantCondition */
96			if (apcu_store($valuesWithStringKeys, null, $ttl) !== []) {
97			return false;
98			}
99
100			foreach ($valuesWithIntegerKeys as $key => $value) {
101			if (!apcu_store((string) $key, $value, $ttl)) {
102			return false;
103			}
104			}
105
106			return true;
107			}
108
109			public function deleteMultiple($keys): bool
110			{
111			$keys = $this->iterableToArray($keys);
112			$this->validateKeys($keys);
113			return apcu_delete($keys) === [];
114			}
115
116			public function has($key): bool
117			{
118			$this->validateKey($key);
119			return apcu_exists($key);
			0 ignored issues – show Bug Best Practice introduced 2019-08-23 10:47 UTC by Report Bug Copy Issue Report The expression `return apcu_exists($key)` could return the type `string[]` which is incompatible with the type-hinted return `boolean`. Consider adding an additional type-check to rule them out. Loading history...
120			}
121
122			/**
123			* Normalizes cache TTL handling `null` value, strings and {@see DateInterval} objects.
124			*
125			* @param DateInterval\|int\|string\|null $ttl The raw TTL.
126			*
127			* @return int TTL value as UNIX timestamp.
128			*/
129			private function normalizeTtl($ttl): int
130			{
131			if ($ttl === null) {
132			return self::TTL_INFINITY;
133			}
134
135			if ($ttl instanceof DateInterval) {
136			return (new DateTime('@0'))->add($ttl)->getTimestamp();
137			}
138
139			return (int) $ttl;
140			}
141
142			/**
143			* Converts iterable to array. If provided value is not iterable it throws an InvalidArgumentException.
144			*
145			* @param mixed $iterable
146			*
147			* @return array
148			*/
149			private function iterableToArray($iterable): array
150			{
151			if (!is_iterable($iterable)) {
152			throw new InvalidArgumentException('Iterable is expected, got ' . gettype($iterable));
153			}
154
155			/** @psalm-suppress RedundantCast */
156			return $iterable instanceof Traversable ? iterator_to_array($iterable) : (array) $iterable;
157			}
158
159			/**
160			* @param mixed $key
161			*/
162			private function validateKey($key): void
163			{
164			if (!is_string($key) \|\| $key === '' \|\| strpbrk($key, '{}()/\@:')) {
165			throw new InvalidArgumentException('Invalid key value.');
166			}
167			}
168
169			/**
170			* @param array $keys
171			*/
172			private function validateKeys(array $keys): void
173			{
174			foreach ($keys as $key) {
175			$this->validateKey($key);
176			}
177			}
178
179			/**
180			* @param array $values
181			*/
182			private function validateKeysOfValues(array $values): void
183			{
184			$keys = array_map('strval', array_keys($values));
185			$this->validateKeys($keys);
186			}
187
188			/**
189			* Normalizes keys returned from apcu_fetch in multiple mode. If one of the keys is an integer (123) or a string
190			* representation of an integer ('123') the returned key from the cache doesn't equal neither to an integer nor a
191			* string ($key !== 123 and $key !== '123'). Coping element from the returned array one by one to the new array
192			* fixes this issue.
193			*
194			* @param array $values
195			*
196			* @return array
197			*/
198			private function normalizeAPCuOutput(array $values): array
199			{
200			$normalizedValues = [];
201
202			foreach ($values as $key => $value) {
203			$normalizedValues[$key] = $value;
204			}
205
206			return $normalizedValues;
207			}
208
209			/**
210			* Splits the array of values into two arrays, one with int keys and one with string keys
211			*
212			* @param array $values
213			*
214			* @return array
215			*/
216			private function splitValuesByKeyType(array $values): array
217			{
218			$withIntKeys = [];
219
220			foreach ($values as $key => $value) {
221			if (is_int($key)) {
222			$withIntKeys[$key] = $value;
223			unset($values[$key]);
224			}
225			}
226
227			return [$values, $withIntKeys];
228			}
229			}
230

yiisoft / cache-apcu

Pull Request — master (#16)

ApcuCache::clear() A

Complexity

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Duplication

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