MemorySimpleCache::clear() - Code Metrics - Inspection of "Add simple cache implementations" - yiisoft/test-support - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — master (#16)

by Aleksei

created 2020-12-09 15:17 UTC

MemorySimpleCache::clear() A

↳ Parent: MemorySimpleCache

Complexity

Conditions	1
Paths	1

Size

Total Lines	4
Code Lines	2

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	3
CRAP Score	1

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	1
eloc	2
c	1
b	0
f	0
nc	1
nop	0
dl	0
loc	4
ccs	3
cts	3
cp	1
crap	1
rs	10

<?php

declare(strict_types=1);

namespace Yiisoft\Test\Support\SimpleCache;

use DateInterval;
use DateTime;
use Psr\SimpleCache\CacheInterface;
use Traversable;
use Yiisoft\Test\Support\SimpleCache\Exception\InvalidArgumentException;
use function array_key_exists;
use function is_object;
use function is_string;

final class MemorySimpleCache implements CacheInterface
{
    protected const EXPIRATION_INFINITY = 0;
    protected const EXPIRATION_EXPIRED = -1;

    public bool $returnOnSet = true;
    public bool $returnOnDelete = true;
    public bool $returnOnClear = true;

    /** @var array<string, array<int, mixed>> */
    protected array $cache = [];

    public function __construct(array $cacheData = [])
    {
        $this->setMultiple($cacheData);
    }

    /**
     * @return mixed
     */
    public function get($key, $default = null)
    {
        $this->validateKey($key);
        /** @psalm-var string $key */
        if (array_key_exists($key, $this->cache) && !$this->isExpired($key)) {
            /** @psalm-var mixed $value */
            $value = $this->cache[$key][0];
            if (is_object($value)) {
                $value = clone $value;
            }

            return $value;
        }

        return $default;
    }

    public function set($key, $value, $ttl = null): bool
    {
        $this->validateKey($key);
        /** @psalm-var string $key */
        $expiration = $this->ttlToExpiration($ttl);
        if ($expiration < 0) {
            return $this->delete($key);
        }
        if (is_object($value)) {
            $value = clone $value;
        }
        $this->cache[$key] = [$value, $expiration];
        return $this->returnOnSet;
    }

    public function delete($key): bool
    {
        $this->validateKey($key);
        /** @psalm-var string $key */
        unset($this->cache[$key]);
        return $this->returnOnDelete;
    }

    public function clear(): bool
    {
        $this->cache = [];
        return $this->returnOnClear;
    }

    /**
     * @return mixed[]
     */
    public function getMultiple($keys, $default = null): iterable
    {
        $keys = $this->iterableToArray($keys);
        $this->validateKeys($keys);
        /** @psalm-var string[] $keys */
        $result = [];
        foreach ($keys as $key) {
            /** @psalm-var mixed */
            $result[$key] = $this->get($key, $default);
        }
        return $result;
    }

    public function setMultiple($values, $ttl = null): bool
    {
        $values = $this->iterableToArray($values);
        $this->validateKeysOfValues($values);
        /**
         * @psalm-var mixed $value
         */
        foreach ($values as $key => $value) {
            $this->set((string) $key, $value, $ttl);
        }
        return $this->returnOnSet;
    }

    public function deleteMultiple($keys): bool
    {
        $keys = $this->iterableToArray($keys);
        $this->validateKeys($keys);
        /** @var string[] $keys */
        foreach ($keys as $key) {
            $this->delete($key);
        }
        return $this->returnOnDelete;
    }

    public function has($key): bool
    {
        $this->validateKey($key);
        /** @psalm-var string $key */
        return isset($this->cache[$key]) && !$this->isExpired($key);
    }

    /**
     * Get stored data
     *
     * @return array<array-key, mixed>

     */
    public function getValues(): array
    {
        $result = [];
        foreach ($this->cache as $key => $value) {
            /** @psalm-var mixed */
            $result[$key] = $value[0];
        }
        return $result;
    }

    /**
     * Checks whether item is expired or not
     */
    private function isExpired(string $key): bool
    {
        return $this->cache[$key][1] !== 0 && $this->cache[$key][1] <= time();
    }

    /**
     * Converts TTL to expiration
     *
     * @param DateInterval|int|null $ttl
     *
     * @return int
     */
    private function ttlToExpiration($ttl): int
    {
        $ttl = $this->normalizeTtl($ttl);

        if ($ttl === null) {
            $expiration = self::EXPIRATION_INFINITY;
        } elseif ($ttl <= 0) {
            $expiration = self::EXPIRATION_EXPIRED;
        } else {
            $expiration = $ttl + time();
        }

        return $expiration;
    }

    /**
     * Normalizes cache TTL handling strings and {@see DateInterval} objects.
     *
     * @param DateInterval|int|string|null $ttl raw TTL.
     *
     * @return int|null TTL value as UNIX timestamp or null meaning infinity
     */
    private function normalizeTtl($ttl): ?int
    {
        if ($ttl instanceof DateInterval) {
            return (new DateTime('@0'))->add($ttl)->getTimestamp();
        }

        if (is_string($ttl)) {
            return (int)$ttl;
        }

        return $ttl;
    }

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

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

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

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


1		<?php
2
3		declare(strict_types=1);
4
5		namespace Yiisoft\Test\Support\SimpleCache;
6
7		use DateInterval;
8		use DateTime;
9		use Psr\SimpleCache\CacheInterface;
10		use Traversable;
11		use Yiisoft\Test\Support\SimpleCache\Exception\InvalidArgumentException;
12		use function array_key_exists;
13		use function is_object;
14		use function is_string;
15
16		final class MemorySimpleCache implements CacheInterface
17		{
18		protected const EXPIRATION_INFINITY = 0;
19		protected const EXPIRATION_EXPIRED = -1;
20
21		public bool $returnOnSet = true;
22		public bool $returnOnDelete = true;
23		public bool $returnOnClear = true;
24
25		/** @var array<string, array<int, mixed>> */
26		protected array $cache = [];
27
28	285	public function __construct(array $cacheData = [])
29		{
30	285	$this->setMultiple($cacheData);
31	285	}
32
33		/**
34		* @return mixed
35		*/
36	159	public function get($key, $default = null)
37		{
38	159	$this->validateKey($key);
39		/** @psalm-var string $key */
40	143	if (array_key_exists($key, $this->cache) && !$this->isExpired($key)) {
41		/** @psalm-var mixed $value */
42	117	$value = $this->cache[$key][0];
43	117	if (is_object($value)) {
44	16	$value = clone $value;
45		}
46
47	117	return $value;
48		}
49
50	53	return $default;
51		}
52
53	200	public function set($key, $value, $ttl = null): bool
54		{
55	200	$this->validateKey($key);
56		/** @psalm-var string $key */
57	184	$expiration = $this->ttlToExpiration($ttl);
58	184	if ($expiration < 0) {
59	2	return $this->delete($key);
60		}
61	184	if (is_object($value)) {
62	42	$value = clone $value;
63		}
64	184	$this->cache[$key] = [$value, $expiration];
65	184	return $this->returnOnSet;
66		}
67
68	46	public function delete($key): bool
69		{
70	46	$this->validateKey($key);
71		/** @psalm-var string $key */
72	30	unset($this->cache[$key]);
73	30	return $this->returnOnDelete;
74		}
75
76	167	public function clear(): bool
77		{
78	167	$this->cache = [];
79	167	return $this->returnOnClear;
80		}
81
82		/**
83		* @return mixed[]
84		*/
85	30	public function getMultiple($keys, $default = null): iterable
86		{
87	30	$keys = $this->iterableToArray($keys);
88	29	$this->validateKeys($keys);
89		/** @psalm-var string[] $keys */
90	15	$result = [];
91	15	foreach ($keys as $key) {
92		/** @psalm-var mixed */
93	15	$result[$key] = $this->get($key, $default);
94		}
95	15	return $result;
96		}
97
98	285	public function setMultiple($values, $ttl = null): bool
99		{
100	285	$values = $this->iterableToArray($values);
101	285	$this->validateKeysOfValues($values);
102		/**
103		* @psalm-var mixed $value
104		*/
105	285	foreach ($values as $key => $value) {
106	26	$this->set((string) $key, $value, $ttl);
107		}
108	285	return $this->returnOnSet;
109		}
110
111	18	public function deleteMultiple($keys): bool
112		{
113	18	$keys = $this->iterableToArray($keys);
114	17	$this->validateKeys($keys);
115		/** @var string[] $keys */
116	3	foreach ($keys as $key) {
117	3	$this->delete($key);
118		}
119	3	return $this->returnOnDelete;
120		}
121
122	70	public function has($key): bool
123		{
124	70	$this->validateKey($key);
125		/** @psalm-var string $key */
126	54	return isset($this->cache[$key]) && !$this->isExpired($key);
127		}
128
129		/**
130		* Get stored data
131		*
132		* @return array<array-key, mixed>
		0 ignored issues – show Documentation Bug introduced 2020-12-08 16:11 UTC by Report Bug Copy Issue Report The doc comment `array<array-key, mixed>` at position `2` could not be parsed: Unknown type name 'array-key' at position 2 in array<array-key, mixed>. Loading history...
133		*/
134	1	public function getValues(): array
135		{
136	1	$result = [];
137	1	foreach ($this->cache as $key => $value) {
138		/** @psalm-var mixed */
139	1	$result[$key] = $value[0];
140		}
141	1	return $result;
142		}
143
144		/**
145		* Checks whether item is expired or not
146		*/
147	133	private function isExpired(string $key): bool
148		{
149	133	return $this->cache[$key][1] !== 0 && $this->cache[$key][1] <= time();
150		}
151
152		/**
153		* Converts TTL to expiration
154		*
155		* @param DateInterval\|int\|null $ttl
156		*
157		* @return int
158		*/
159	184	private function ttlToExpiration($ttl): int
160		{
161	184	$ttl = $this->normalizeTtl($ttl);
162
163	184	if ($ttl === null) {
164	182	$expiration = self::EXPIRATION_INFINITY;
165	6	} elseif ($ttl <= 0) {
166	2	$expiration = self::EXPIRATION_EXPIRED;
167		} else {
168	4	$expiration = $ttl + time();
169		}
170
171	184	return $expiration;
172		}
173
174		/**
175		* Normalizes cache TTL handling strings and {@see DateInterval} objects.
176		*
177		* @param DateInterval\|int\|string\|null $ttl raw TTL.
178		*
179		* @return int\|null TTL value as UNIX timestamp or null meaning infinity
180		*/
181	184	private function normalizeTtl($ttl): ?int
182		{
183	184	if ($ttl instanceof DateInterval) {
184	2	return (new DateTime('@0'))->add($ttl)->getTimestamp();
185		}
186
187	184	if (is_string($ttl)) {
188		return (int)$ttl;
189		}
190
191	184	return $ttl;
192		}
193
194		/**
195		* @param mixed $iterable
196		*
197		* Converts iterable to array. If provided value is not iterable it throws an InvalidArgumentException
198		*/
199	285	private function iterableToArray($iterable): array
200		{
201	285	if (!is_iterable($iterable)) {
202	3	throw new InvalidArgumentException(sprintf('Iterable is expected, got %s.', gettype($iterable)));
203		}
204	285	return $iterable instanceof Traversable ? iterator_to_array($iterable) : $iterable;
205		}
206
207		/**
208		* @param mixed $key
209		*/
210	278	private function validateKey($key): void
211		{
212	278	if (!is_string($key) \|\| $key === '' \|\| strpbrk($key, '{}()/\@:')) {
213	106	throw new InvalidArgumentException('Invalid key value.');
214		}
215	200	}
216
217		/**
218		* @param mixed[] $keys
219		*/
220	285	private function validateKeys(array $keys): void
221		{
222		/** @psalm-var mixed $key */
223	285	foreach ($keys as $key) {
224	68	$this->validateKey($key);
225		}
226	285	}
227
228	285	private function validateKeysOfValues(array $values): void
229		{
230	285	$keys = array_map('strval', array_keys($values));
231	285	$this->validateKeys($keys);
232	285	}
233		}
234

yiisoft / test-support

Pull Request — master (#16)

MemorySimpleCache::clear() A

Complexity

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Duplication

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