5772374863

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93.44

/src/Caching/Cache.php

<?php

/**
 * This file is part of the Nette Framework (https://nette.org)
 * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
 */

declare(strict_types=1);

namespace Nette\Caching;

use Nette;


/**
 * Implements the cache for a application.
 */
class Cache
{
        use Nette\SmartObject;

        /** dependency */
        public const
                Priority = 'priority',
                Expire = 'expire',
                Sliding = 'sliding',
                Tags = 'tags',
                Files = 'files',
                Items = 'items',
                Constants = 'consts',
                Callbacks = 'callbacks',
                Namespaces = 'namespaces',
                All = 'all';

        /** @deprecated use Cache::Priority */
        public const PRIORITY = self::Priority;

        /** @deprecated use Cache::Expire */
        public const EXPIRATION = self::Expire;

        /** @deprecated use Cache::Expire */
        public const EXPIRE = self::Expire;

        /** @deprecated use Cache::Sliding */
        public const SLIDING = self::Sliding;

        /** @deprecated use Cache::Tags */
        public const TAGS = self::Tags;

        /** @deprecated use Cache::Files */
        public const FILES = self::Files;

        /** @deprecated use Cache::Items */
        public const ITEMS = self::Items;

        /** @deprecated use Cache::Constants */
        public const CONSTS = self::Constants;

        /** @deprecated use Cache::Callbacks */
        public const CALLBACKS = self::Callbacks;

        /** @deprecated use Cache::Namespaces */
        public const NAMESPACES = self::Namespaces;

        /** @deprecated use Cache::All */
        public const ALL = self::All;

        /** @internal */
        public const NamespaceSeparator = "\x00";

        private Storage $storage;
        private string $namespace;


        public function __construct(Storage $storage, ?string $namespace = null)
        {
                $this->storage = $storage;
                $this->namespace = $namespace . self::NamespaceSeparator;
        }


        /**
         * Returns cache storage.
         */
        final public function getStorage(): Storage
        {
                return $this->storage;
        }


        /**
         * Returns cache namespace.
         */
        final public function getNamespace(): string
        {
                return substr($this->namespace, 0, -1);
        }


        /**
         * Returns new nested cache object.
         */
        public function derive(string $namespace): static
        {
                return new static($this->storage, $this->namespace . $namespace);
        }


        /**
         * Reads the specified item from the cache or generate it.
         */
        public function load(mixed $key, ?callable $generator = null, ?array $dependencies = null): mixed
        {
                $storageKey = $this->generateKey($key);
                $data = $this->storage->read($storageKey);
                if ($data === null && $generator) {
                        $this->storage->lock($storageKey);
                        try {
                                $data = $generator(...[&$dependencies]);
                        } catch (\Throwable $e) {
                                $this->storage->remove($storageKey);
                                throw $e;
                        }

                        $this->save($key, $data, $dependencies);
                }

                return $data;
        }


        /**
         * Reads multiple items from the cache.
         */
        public function bulkLoad(array $keys, ?callable $generator = null): array
        {
                if (count($keys) === 0) {
                        return [];
                }

                foreach ($keys as $key) {
                        if (!is_scalar($key)) {
                                throw new Nette\InvalidArgumentException('Only scalar keys are allowed in bulkLoad()');
                        }
                }

                $result = [];
                if (!$this->storage instanceof BulkReader) {
                        foreach ($keys as $key) {
                                $result[$key] = $this->load(
                                        $key,
                                        $generator
                                                ? fn(&$dependencies) => $generator(...[$key, &$dependencies])
                                                : null,
                                );
                        }

                        return $result;
                }

                $storageKeys = array_map([$this, 'generateKey'], $keys);
                $cacheData = $this->storage->bulkRead($storageKeys);
                foreach ($keys as $i => $key) {
                        $storageKey = $storageKeys[$i];
                        if (isset($cacheData[$storageKey])) {
                                $result[$key] = $cacheData[$storageKey];
                        } elseif ($generator) {
                                $result[$key] = $this->load($key, fn(&$dependencies) => $generator(...[$key, &$dependencies]));
                        } else {
                                $result[$key] = null;
                        }
                }

                return $result;
        }


        /**
         * Writes item into the cache.
         * Dependencies are:
         * - Cache::Priority => (int) priority
         * - Cache::Expire => (timestamp) expiration
         * - Cache::Sliding => (bool) use sliding expiration?
         * - Cache::Tags => (array) tags
         * - Cache::Files => (array|string) file names
         * - Cache::Items => (array|string) cache items
         * - Cache::Constants => (array|string) cache items
         * @return mixed  value itself
         * @throws Nette\InvalidArgumentException
         */
        public function save(mixed $key, mixed $data, ?array $dependencies = null): mixed
        {
                $key = $this->generateKey($key);

                if ($data instanceof \Closure) {
                        $this->storage->lock($key);
                        try {
                                $data = $data(...[&$dependencies]);
                        } catch (\Throwable $e) {
                                $this->storage->remove($key);
                                throw $e;
                        }
                }

                if ($data === null) {
                        $this->storage->remove($key);
                        return null;
                } else {
                        $dependencies = $this->completeDependencies($dependencies);
                        if (isset($dependencies[self::Expire]) && $dependencies[self::Expire] <= 0) {
                                $this->storage->remove($key);
                        } else {
                                $this->storage->write($key, $data, $dependencies);
                        }

                        return $data;
                }
        }


        private function completeDependencies(?array $dp): array
        {
                // convert expire into relative amount of seconds
                if (isset($dp[self::Expire])) {
                        $dp[self::Expire] = Nette\Utils\DateTime::from($dp[self::Expire])->format('U') - time();
                }

                // make list from TAGS
                if (isset($dp[self::Tags])) {
                        $dp[self::Tags] = array_values((array) $dp[self::Tags]);
                }

                // make list from NAMESPACES
                if (isset($dp[self::Namespaces])) {
                        $dp[self::Namespaces] = array_values((array) $dp[self::Namespaces]);
                }

                // convert FILES into CALLBACKS
                if (isset($dp[self::Files])) {
                        foreach (array_unique((array) $dp[self::Files]) as $item) {
                                $dp[self::Callbacks][] = [[self::class, 'checkFile'], $item, @filemtime($item) ?: null]; // @ - stat may fail
                        }

                        unset($dp[self::Files]);
                }

                // add namespaces to items
                if (isset($dp[self::Items])) {
                        $dp[self::Items] = array_unique(array_map([$this, 'generateKey'], (array) $dp[self::Items]));
                }

                // convert CONSTS into CALLBACKS
                if (isset($dp[self::Constants])) {
                        foreach (array_unique((array) $dp[self::Constants]) as $item) {
                                $dp[self::Callbacks][] = [[self::class, 'checkConst'], $item, constant($item)];
                        }

                        unset($dp[self::Constants]);
                }

                if (!is_array($dp)) {
                        $dp = [];
                }

                return $dp;
        }


        /**
         * Removes item from the cache.
         */
        public function remove(mixed $key): void
        {
                $this->save($key, null);
        }


        /**
         * Removes items from the cache by conditions.
         * Conditions are:
         * - Cache::Priority => (int) priority
         * - Cache::Tags => (array) tags
         * - Cache::All => true
         */
        public function clean(?array $conditions = null): void
        {
                $conditions = (array) $conditions;
                if (isset($conditions[self::Tags])) {
                        $conditions[self::Tags] = array_values((array) $conditions[self::Tags]);
                }

                $this->storage->clean($conditions);
        }


        /**
         * Caches results of function/method calls.
         */
        public function call(callable $function): mixed
        {
                $key = func_get_args();
                if (is_array($function) && is_object($function[0])) {
                        $key[0][0] = get_class($function[0]);
                }

                return $this->load($key, fn() => $function(...array_slice($key, 1)));
        }


        /**
         * Caches results of function/method calls.
         */
        public function wrap(callable $function, ?array $dependencies = null): \Closure
        {
                return function () use ($function, $dependencies) {
                        $key = [$function, $args = func_get_args()];
                        if (is_array($function) && is_object($function[0])) {
                                $key[0][0] = get_class($function[0]);
                        }

                        return $this->load($key, function (&$deps) use ($function, $args, $dependencies) {
                                $deps = $dependencies;
                                return $function(...$args);
                        });
                };
        }


        /**
         * Starts the output cache.
         */
        public function capture(mixed $key): ?OutputHelper
        {
                $data = $this->load($key);
                if ($data === null) {
                        return new OutputHelper($this, $key);
                }

                echo $data;
                return null;
        }


        /**
         * @deprecated  use capture()
         */
        public function start($key): ?OutputHelper
        {
                trigger_error(__METHOD__ . '() was renamed to capture()', E_USER_DEPRECATED);
                return $this->capture($key);
        }


        /**
         * Generates internal cache key.
         */
        protected function generateKey($key): string
        {
                return $this->namespace . md5(is_scalar($key) ? (string) $key : serialize($key));
        }


        /********************* dependency checkers ****************d*g**/


        /**
         * Checks CALLBACKS dependencies.
         */
        public static function checkCallbacks(array $callbacks): bool
        {
                foreach ($callbacks as $callback) {
                        if (!array_shift($callback)(...$callback)) {
                                return false;
                        }
                }

                return true;
        }


        /**
         * Checks CONSTS dependency.
         */
        private static function checkConst(string $const, $value): bool
        {
                return defined($const) && constant($const) === $value;
        }


        /**
         * Checks FILES dependency.
         */
        private static function checkFile(string $file, ?int $time): bool
        {
                return @filemtime($file) == $time; // @ - stat may fail
        }
}

1	<?php
2
3	/**
4	* This file is part of the Nette Framework (https://nette.org)
5	* Copyright (c) 2004 David Grudl (https://davidgrudl.com)
6	*/
7
8	declare(strict_types=1);
9
10	namespace Nette\Caching;
11
12	use Nette;
13
14
15	/**
16	* Implements the cache for a application.
17	*/
18	class Cache
19	{
20	use Nette\SmartObject;
21
22	/** dependency */
23	public const
24	Priority = 'priority',
25	Expire = 'expire',
26	Sliding = 'sliding',
27	Tags = 'tags',
28	Files = 'files',
29	Items = 'items',
30	Constants = 'consts',
31	Callbacks = 'callbacks',
32	Namespaces = 'namespaces',
33	All = 'all';
34
35	/** @deprecated use Cache::Priority */
36	public const PRIORITY = self::Priority;
37
38	/** @deprecated use Cache::Expire */
39	public const EXPIRATION = self::Expire;
40
41	/** @deprecated use Cache::Expire */
42	public const EXPIRE = self::Expire;
43
44	/** @deprecated use Cache::Sliding */
45	public const SLIDING = self::Sliding;
46
47	/** @deprecated use Cache::Tags */
48	public const TAGS = self::Tags;
49
50	/** @deprecated use Cache::Files */
51	public const FILES = self::Files;
52
53	/** @deprecated use Cache::Items */
54	public const ITEMS = self::Items;
55
56	/** @deprecated use Cache::Constants */
57	public const CONSTS = self::Constants;
58
59	/** @deprecated use Cache::Callbacks */
60	public const CALLBACKS = self::Callbacks;
61
62	/** @deprecated use Cache::Namespaces */
63	public const NAMESPACES = self::Namespaces;
64
65	/** @deprecated use Cache::All */
66	public const ALL = self::All;
67
68	/** @internal */
69	public const NamespaceSeparator = "\x00";
70
71	private Storage $storage;
72	private string $namespace;
73
74
75	public function __construct(Storage $storage, ?string $namespace = null)	1✔
76	{
77	$this->storage = $storage;	1✔
78	$this->namespace = $namespace . self::NamespaceSeparator;	1✔
79	}	1✔
80
81
82	/**
83	* Returns cache storage.
84	*/
85	final public function getStorage(): Storage
86	{
87	return $this->storage;	×
88	}
89
90
91	/**
92	* Returns cache namespace.
93	*/
94	final public function getNamespace(): string
95	{
96	return substr($this->namespace, 0, -1);	1✔
97	}
98
99
100	/**
101	* Returns new nested cache object.
102	*/
103	public function derive(string $namespace): static	1✔
104	{
105	return new static($this->storage, $this->namespace . $namespace);	1✔
106	}
107
108
109	/**
110	* Reads the specified item from the cache or generate it.
111	*/
112	public function load(mixed $key, ?callable $generator = null, ?array $dependencies = null): mixed	1✔
113	{
114	$storageKey = $this->generateKey($key);	1✔
115	$data = $this->storage->read($storageKey);	1✔
116	if ($data === null && $generator) {	1✔
117	$this->storage->lock($storageKey);	1✔
118	try {
119	$data = $generator(...[&$dependencies]);	1✔
120	} catch (\Throwable $e) {	1✔
121	$this->storage->remove($storageKey);	1✔
122	throw $e;	1✔
123	}
124
125	$this->save($key, $data, $dependencies);	1✔
126	}
127
128	return $data;	1✔
129	}
130
131
132	/**
133	* Reads multiple items from the cache.
134	*/
135	public function bulkLoad(array $keys, ?callable $generator = null): array	1✔
136	{
137	if (count($keys) === 0) {	1✔
138	return [];	×
139	}
140
141	foreach ($keys as $key) {	1✔
142	if (!is_scalar($key)) {	1✔
143	throw new Nette\InvalidArgumentException('Only scalar keys are allowed in bulkLoad()');	1✔
144	}
145	}
146
147	$result = [];	1✔
148	if (!$this->storage instanceof BulkReader) {	1✔
149	foreach ($keys as $key) {	1✔
150	$result[$key] = $this->load(	1✔
151	$key,	1✔
152	$generator	1✔
153	? fn(&$dependencies) => $generator(...[$key, &$dependencies])	1✔
154	: null,	1✔
155	);
156	}
157
158	return $result;	1✔
159	}
160
161	$storageKeys = array_map([$this, 'generateKey'], $keys);	1✔
162	$cacheData = $this->storage->bulkRead($storageKeys);	1✔
163	foreach ($keys as $i => $key) {	1✔
164	$storageKey = $storageKeys[$i];	1✔
165	if (isset($cacheData[$storageKey])) {	1✔
166	$result[$key] = $cacheData[$storageKey];	1✔
167	} elseif ($generator) {	1✔
168	$result[$key] = $this->load($key, fn(&$dependencies) => $generator(...[$key, &$dependencies]));	1✔
169	} else {
170	$result[$key] = null;	1✔
171	}
172	}
173
174	return $result;	1✔
175	}
176
177
178	/**
179	* Writes item into the cache.
180	* Dependencies are:
181	* - Cache::Priority => (int) priority
182	* - Cache::Expire => (timestamp) expiration
183	* - Cache::Sliding => (bool) use sliding expiration?
184	* - Cache::Tags => (array) tags
185	* - Cache::Files => (array\|string) file names
186	* - Cache::Items => (array\|string) cache items
187	* - Cache::Constants => (array\|string) cache items
188	* @return mixed value itself
189	* @throws Nette\InvalidArgumentException
190	*/
191	public function save(mixed $key, mixed $data, ?array $dependencies = null): mixed	1✔
192	{
193	$key = $this->generateKey($key);	1✔
194
195	if ($data instanceof \Closure) {	1✔
196	$this->storage->lock($key);	1✔
197	try {
198	$data = $data(...[&$dependencies]);	1✔
199	} catch (\Throwable $e) {	×
200	$this->storage->remove($key);	×
201	throw $e;	×
202	}
203	}
204
205	if ($data === null) {	1✔
206	$this->storage->remove($key);	1✔
207	return null;	1✔
208	} else {
209	$dependencies = $this->completeDependencies($dependencies);	1✔
210	if (isset($dependencies[self::Expire]) && $dependencies[self::Expire] <= 0) {	1✔
211	$this->storage->remove($key);	1✔
212	} else {
213	$this->storage->write($key, $data, $dependencies);	1✔
214	}
215
216	return $data;	1✔
217	}
218	}
219
220
221	private function completeDependencies(?array $dp): array	1✔
222	{
223	// convert expire into relative amount of seconds
224	if (isset($dp[self::Expire])) {	1✔
225	$dp[self::Expire] = Nette\Utils\DateTime::from($dp[self::Expire])->format('U') - time();	1✔
226	}
227
228	// make list from TAGS
229	if (isset($dp[self::Tags])) {	1✔
230	$dp[self::Tags] = array_values((array) $dp[self::Tags]);	1✔
231	}
232
233	// make list from NAMESPACES
234	if (isset($dp[self::Namespaces])) {	1✔
235	$dp[self::Namespaces] = array_values((array) $dp[self::Namespaces]);	×
236	}
237
238	// convert FILES into CALLBACKS
239	if (isset($dp[self::Files])) {	1✔
240	foreach (array_unique((array) $dp[self::Files]) as $item) {	1✔
241	$dp[self::Callbacks][] = [[self::class, 'checkFile'], $item, @filemtime($item) ?: null]; // @ - stat may fail	1✔
242	}
243
244	unset($dp[self::Files]);	1✔
245	}
246
247	// add namespaces to items
248	if (isset($dp[self::Items])) {	1✔
249	$dp[self::Items] = array_unique(array_map([$this, 'generateKey'], (array) $dp[self::Items]));	1✔
250	}
251
252	// convert CONSTS into CALLBACKS
253	if (isset($dp[self::Constants])) {	1✔
254	foreach (array_unique((array) $dp[self::Constants]) as $item) {	1✔
255	$dp[self::Callbacks][] = [[self::class, 'checkConst'], $item, constant($item)];	1✔
256	}
257
258	unset($dp[self::Constants]);	1✔
259	}
260
261	if (!is_array($dp)) {	1✔
262	$dp = [];	1✔
263	}
264
265	return $dp;	1✔
266	}
267
268
269	/**
270	* Removes item from the cache.
271	*/
272	public function remove(mixed $key): void	1✔
273	{
274	$this->save($key, null);	1✔
275	}	1✔
276
277
278	/**
279	* Removes items from the cache by conditions.
280	* Conditions are:
281	* - Cache::Priority => (int) priority
282	* - Cache::Tags => (array) tags
283	* - Cache::All => true
284	*/
285	public function clean(?array $conditions = null): void	1✔
286	{
287	$conditions = (array) $conditions;	1✔
288	if (isset($conditions[self::Tags])) {	1✔
289	$conditions[self::Tags] = array_values((array) $conditions[self::Tags]);	1✔
290	}
291
292	$this->storage->clean($conditions);	1✔
293	}	1✔
294
295
296	/**
297	* Caches results of function/method calls.
298	*/
299	public function call(callable $function): mixed	1✔
300	{
301	$key = func_get_args();	1✔
302	if (is_array($function) && is_object($function[0])) {	1✔
303	$key[0][0] = get_class($function[0]);	1✔
304	}
305
306	return $this->load($key, fn() => $function(...array_slice($key, 1)));	1✔
307	}
308
309
310	/**
311	* Caches results of function/method calls.
312	*/
313	public function wrap(callable $function, ?array $dependencies = null): \Closure	1✔
314	{
315	return function () use ($function, $dependencies) {	1✔
316	$key = [$function, $args = func_get_args()];	1✔
317	if (is_array($function) && is_object($function[0])) {	1✔
318	$key[0][0] = get_class($function[0]);	1✔
319	}
320
321	return $this->load($key, function (&$deps) use ($function, $args, $dependencies) {	1✔
322	$deps = $dependencies;	1✔
323	return $function(...$args);	1✔
324	});	1✔
325	};	1✔
326	}
327
328
329	/**
330	* Starts the output cache.
331	*/
332	public function capture(mixed $key): ?OutputHelper	1✔
333	{
334	$data = $this->load($key);	1✔
335	if ($data === null) {	1✔
336	return new OutputHelper($this, $key);	1✔
337	}
338
339	echo $data;	1✔
340	return null;	1✔
341	}
342
343
344	/**
345	* @deprecated use capture()
346	*/
347	public function start($key): ?OutputHelper
348	{
349	trigger_error(__METHOD__ . '() was renamed to capture()', E_USER_DEPRECATED);	×
350	return $this->capture($key);	×
351	}
352
353
354	/**
355	* Generates internal cache key.
356	*/
357	protected function generateKey($key): string
358	{
359	return $this->namespace . md5(is_scalar($key) ? (string) $key : serialize($key));	1✔
360	}
361
362
363	/******************* dependency checkers *************dg**/
364
365
366	/**
367	* Checks CALLBACKS dependencies.
368	*/
369	public static function checkCallbacks(array $callbacks): bool	1✔
370	{
371	foreach ($callbacks as $callback) {	1✔
372	if (!array_shift($callback)(...$callback)) {	1✔
373	return false;	1✔
374	}
375	}
376
377	return true;	1✔
378	}
379
380
381	/**
382	* Checks CONSTS dependency.
383	*/
384	private static function checkConst(string $const, $value): bool	1✔
385	{
386	return defined($const) && constant($const) === $value;	1✔
387	}
388
389
390	/**
391	* Checks FILES dependency.
392	*/
393	private static function checkFile(string $file, ?int $time): bool	1✔
394	{
395	return @filemtime($file) == $time; // @ - stat may fail	1✔
396	}
397	}

nette / caching / 5772374863

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