FileCache::read() - Code Metrics - ICanBoogie/CLDR - Measure and Improve Code Quality continuously with Scrutinizer

FileCache::read() A
last analyzed 2025-06-19 01:32 UTC

↳ Parent: FileCache

Complexity

Conditions	1
Paths	1

Size

Total Lines	3
Code Lines	1

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	1
eloc	1
nc	1
nop	1
dl	0
loc	3
rs	10
c	0
b	0
f	0

<?php

namespace ICanBoogie\CLDR\Cache;

use Exception;
use ICanBoogie\CLDR\Cache;
use Throwable;

use function dirname;
use function fclose;
use function file_exists;
use function file_put_contents;
use function flock;
use function fopen;
use function is_writable;
use function mt_rand;
use function rename;
use function restore_error_handler;
use function rtrim;
use function set_error_handler;
use function str_replace;
use function uniqid;
use function unlink;

/**
 * A storage using the file system.
 */
final class FileCache implements Cache
{
    /**
     * Recommended name for the cache directory.
     */
    public const RECOMMENDED_DIR = '.cldr-cache';

    private static bool $release_after;

    /**
     * Absolute path to the storage directory.
     */
    private string $path;

    /**
     * @param string $path Absolute path to the storage directory.
     */
    public function __construct(string $path)
    {
        $this->path = rtrim($path, DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR;

        self::$release_after ??= !(str_starts_with(PHP_OS, 'WIN'));
    }

    public function get(string $path): ?array
    {
        $pathname = $this->format_absolute_pathname($path);

        if (!file_exists($pathname)) {
            return null;
        }

        return $this->read($pathname);
    }

    /**
     * @throws Throwable
     */
    public function set(string $path, array $data): void
    {
        $this->assert_writable();

        $pathname = $this->format_absolute_pathname($path);

        // @phpstan-ignore-next-line
        set_error_handler(fn() => null);

        try {
            $this->safe_set($pathname, $data);
        } finally {
            restore_error_handler();
        }
    }

    private function format_absolute_pathname(string $path): string
    {
        return $this->path . str_replace('/', '--', $path) . '.php';
    }

    /**
     * @phpstan-ignore-next-line
     */
    private function read(string $pathname): array
    {
        return require $pathname;
    }

    /**
     * @phpstan-ignore-next-line
     */
    private function write(string $pathname, array $data): void
    {
        $var = var_export($data, true);
        $content = <<<PHP
        <?php return $var;
        PHP;

        file_put_contents($pathname, $content);
    }

    /**
     * Safely set the value.
     *
     * @throws Exception
     *
     * @phpstan-ignore-next-line
     */
    private function safe_set(string $pathname, array $data): void
    {
        $dir = dirname($pathname);
        $uniqid = uniqid((string)mt_rand(), true);
        $tmp_pathname = $dir . '/var-' . $uniqid;
        $garbage_pathname = $dir . '/garbage-var-' . $uniqid;

        #
        # We lock the file create/update, but we write the data in a temporary file, which is then
        # renamed once the data is written.
        #

        $fh = fopen($pathname, 'a+');

        if (!$fh) {

            throw new Exception("Unable to open $pathname.");
        }

        if (self::$release_after && !flock($fh, LOCK_EX)) {
            throw new Exception("Unable to get to exclusive lock on $pathname.");
        }

        $this->write($tmp_pathname, $data);

        #
        # Windows, this is for you
        #
        if (!self::$release_after) {
            fclose($fh);
        }

        if (!rename($pathname, $garbage_pathname)) {
            throw new Exception("Unable to rename $pathname as $garbage_pathname.");
        }

        if (!rename($tmp_pathname, $pathname)) {
            throw new Exception("Unable to rename $tmp_pathname as $pathname.");
        }

        if (!unlink($garbage_pathname)) {
            throw new Exception("Unable to delete $garbage_pathname.");
        }

        #
        # Unix, this is for you
        #
        if (self::$release_after) {
            flock($fh, LOCK_UN);
            fclose($fh);
        }
    }

    /**
     * Checks whether the storage directory is writable.
     *
     * @throws Exception when the storage directory is not writable.
     */
    private function assert_writable(): void
    {
        $path = $this->path;

        if (!is_writable($path)) {
            throw new Exception("The directory $path is not writable.");
        }
    }
}


1			<?php
2
3			namespace ICanBoogie\CLDR\Cache;
4
5			use Exception;
6			use ICanBoogie\CLDR\Cache;
7			use Throwable;
8
9			use function dirname;
10			use function fclose;
11			use function file_exists;
12			use function file_put_contents;
13			use function flock;
14			use function fopen;
15			use function is_writable;
16			use function mt_rand;
17			use function rename;
18			use function restore_error_handler;
19			use function rtrim;
20			use function set_error_handler;
21			use function str_replace;
22			use function uniqid;
23			use function unlink;
24
25			/**
26			* A storage using the file system.
27			*/
28			final class FileCache implements Cache
29			{
30			/**
31			* Recommended name for the cache directory.
32			*/
33			public const RECOMMENDED_DIR = '.cldr-cache';
34
35			private static bool $release_after;
36
37			/**
38			* Absolute path to the storage directory.
39			*/
40			private string $path;
41
42			/**
43			* @param string $path Absolute path to the storage directory.
44			*/
45			public function __construct(string $path)
46			{
47			$this->path = rtrim($path, DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR;
48
49			self::$release_after ??= !(str_starts_with(PHP_OS, 'WIN'));
50			}
51
52			public function get(string $path): ?array
53			{
54			$pathname = $this->format_absolute_pathname($path);
55
56			if (!file_exists($pathname)) {
57			return null;
58			}
59
60			return $this->read($pathname);
61			}
62
63			/**
64			* @throws Throwable
65			*/
66			public function set(string $path, array $data): void
67			{
68			$this->assert_writable();
69
70			$pathname = $this->format_absolute_pathname($path);
71
72			// @phpstan-ignore-next-line
73			set_error_handler(fn() => null);
74
75			try {
76			$this->safe_set($pathname, $data);
77			} finally {
78			restore_error_handler();
79			}
80			}
81
82			private function format_absolute_pathname(string $path): string
83			{
84			return $this->path . str_replace('/', '--', $path) . '.php';
85			}
86
87			/**
88			* @phpstan-ignore-next-line
89			*/
90			private function read(string $pathname): array
91			{
92			return require $pathname;
93			}
94
95			/**
96			* @phpstan-ignore-next-line
97			*/
98			private function write(string $pathname, array $data): void
99			{
100			$var = var_export($data, true);
101			$content = <<<PHP
102			<?php return $var;
103			PHP;
104
105			file_put_contents($pathname, $content);
106			}
107
108			/**
109			* Safely set the value.
110			*
111			* @throws Exception
112			*
113			* @phpstan-ignore-next-line
114			*/
115			private function safe_set(string $pathname, array $data): void
116			{
117			$dir = dirname($pathname);
118			$uniqid = uniqid((string)mt_rand(), true);
119			$tmp_pathname = $dir . '/var-' . $uniqid;
120			$garbage_pathname = $dir . '/garbage-var-' . $uniqid;
121
122			#
123			# We lock the file create/update, but we write the data in a temporary file, which is then
124			# renamed once the data is written.
125			#
126
127			$fh = fopen($pathname, 'a+');
128
129			if (!$fh) {
			0 ignored issues – show introduced 2024-08-09 22:13 UTC by Report Bug Copy Issue Report `$fh` is of type `resource`, thus it always evaluated to `false`. Loading history...
130			throw new Exception("Unable to open $pathname.");
131			}
132
133			if (self::$release_after && !flock($fh, LOCK_EX)) {
134			throw new Exception("Unable to get to exclusive lock on $pathname.");
135			}
136
137			$this->write($tmp_pathname, $data);
138
139			#
140			# Windows, this is for you
141			#
142			if (!self::$release_after) {
143			fclose($fh);
144			}
145
146			if (!rename($pathname, $garbage_pathname)) {
147			throw new Exception("Unable to rename $pathname as $garbage_pathname.");
148			}
149
150			if (!rename($tmp_pathname, $pathname)) {
151			throw new Exception("Unable to rename $tmp_pathname as $pathname.");
152			}
153
154			if (!unlink($garbage_pathname)) {
155			throw new Exception("Unable to delete $garbage_pathname.");
156			}
157
158			#
159			# Unix, this is for you
160			#
161			if (self::$release_after) {
162			flock($fh, LOCK_UN);
163			fclose($fh);
164			}
165			}
166
167			/**
168			* Checks whether the storage directory is writable.
169			*
170			* @throws Exception when the storage directory is not writable.
171			*/
172			private function assert_writable(): void
173			{
174			$path = $this->path;
175
176			if (!is_writable($path)) {
177			throw new Exception("The directory $path is not writable.");
178			}
179			}
180			}
181

ICanBoogie / CLDR

FileCache::read() A last analyzed 2025-06-19 01:32 UTC

Complexity

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Duplication

Importance

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FileCache::read() A
last analyzed 2025-06-19 01:32 UTC