Transients::invalidate() - Code Metrics - mundschenk-at/wp-data-storage - Measure and Improve Code Quality continuously with Scrutinizer

Transients::invalidate() A
last analyzed 2019-02-08 20:28 UTC

↳ Parent: Transients

Complexity

Conditions	3
Paths	2

Size

Total Lines	12
Code Lines	5

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	6
CRAP Score	3

Importance

Changes

Metric	Value
cc	3
eloc	5
nc	2
nop	0
dl	0
loc	12
ccs	6
cts	6
cp	1
crap	3
rs	10
c	0
b	0
f	0

<?php
/**
 * This file is part of mundschenk-at/wp-data-storage.
 *
 * Copyright 2017-2019 Peter Putzer.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or ( at your option ) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * @package mundschenk-at/wp-data-storage/tests
 * @license http://www.gnu.org/licenses/gpl-2.0.html
 */

namespace Mundschenk\Data_Storage;

/**
 * Implements an interface to the WordPress Transients API.
 *
 * @since 1.0.0
 *
 * @author Peter Putzer <[email protected]>
 */
class Transients extends Abstract_Cache {

	const TRANSIENT_SQL_PREFIX = '_transient_';

	/**
	 * The incrementor transient key.
	 *
	 * @var string
	 */
	protected $incrementor_key;

	/**
	 * Create new cache instance.
	 *
	 * @param string $prefix The prefix automatically added to transient names.
	 */
	public function __construct( $prefix ) {
		$this->incrementor_key = $prefix . 'transients_incrementor';
		$this->incrementor     = $this->get( $this->incrementor_key, true );

		parent::__construct( $prefix );
	}

	/**
	 * Invalidate all cached elements by reseting the incrementor.
	 */
	public function invalidate() {

		if ( ! \wp_using_ext_object_cache() ) {
			// Clean up old transients.
			foreach ( $this->get_keys_from_database() as $old_transient ) {
				$this->delete( $old_transient, true );
			}
		}

		// Update incrementor.
		$this->incrementor = time();
		$this->set( $this->incrementor_key, $this->incrementor, 0, true );
	}

	/**
	 * Retrieves a list of transients set by the plugin from the options table.
	 *
	 * @return string[]
	 */
	public function get_keys_from_database() {
		/**
		 * WordPress database handler.
		 *
		 * @var \wpdb
		 */
		global $wpdb;

		$results = $wpdb->get_results(
			$wpdb->prepare(
				"SELECT option_name FROM {$wpdb->options} WHERE option_name like %s",
				static::TRANSIENT_SQL_PREFIX . "{$this->get_prefix()}%"
			),
			ARRAY_A
		); // WPCS: db call ok, cache ok.

		return \str_replace( static::TRANSIENT_SQL_PREFIX, '', \wp_list_pluck( $results, 'option_name' ) );
	}

	/**
	 * Retrieves a cached value.
	 *
	 * @param string $key The cache key.
	 * @param bool   $raw Optional. Use the raw key name (i.e. don't call get_key). Default false.
	 *
	 * @return mixed
	 */
	public function get( $key, $raw = false ) {
		return \get_transient( $raw ? $key : $this->get_key( $key ) );
	}

	/**
	 * Retrieves a cached large object.
	 *
	 * @param string $key The cache key.
	 *
	 * @return mixed
	 */
	public function get_large_object( $key ) {
		$encoded = $this->get( $key );
		if ( false === $encoded ) {
			return false;
		}

		$uncompressed = @\gzdecode( \base64_decode( $encoded ) ); // @codingStandardsIgnoreLine
		if ( false === $uncompressed ) {
			return false;
		}

		return $this->maybe_fix_object( \unserialize( $uncompressed ) ); // @codingStandardsIgnoreLine
	}

	/**
	 * Sets an entry in the cache and stores the key.
	 *
	 * @param string $key       The cache key.
	 * @param mixed  $value     The value to store.
	 * @param int    $duration  Optional. The duration in seconds. Default 0 (no expiration).
	 * @param bool   $raw       Optional. Use the raw key name (i.e. don't call get_key). Default false.
	 *
	 * @return bool True if the cache could be set successfully.
	 */
	public function set( $key, $value, $duration = 0, $raw = false ) {
		return \set_transient( $raw ? $key : $this->get_key( $key ), $value, $duration );
	}

	/**
	 * Sets a transient for a large PHP object. The object will be stored in
	 * serialized and gzip encoded form using Base64 encoding to ensure binary safety.
	 *
	 * @param string $key       The cache key.
	 * @param mixed  $value     The value to store.
	 * @param int    $duration  Optional. The duration in seconds. Default 0 (no expiration).
	 *
	 * @return bool True if the cache could be set successfully.
	 */
	public function set_large_object( $key, $value, $duration = 0 ) {
		$compressed = \gzencode( \serialize( $value ) ); // @codingStandardsIgnoreLine

		if ( false === $compressed ) {
			return false; // @codeCoverageIgnore
		}

		// base64_encode() is used to safely store the gzipped serialized object
		// in the WordPress database.
		return $this->set( $key, \base64_encode( $compressed ), $duration ); // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode
	}

	/**
	 * Deletes an entry from the cache.
	 *
	 * @param string $key The cache key root.
	 * @param bool   $raw Optional. Use the raw key name (i.e. don't call get_key). Default false.
	 *
	 * @return bool True on successful removal, false on failure.
	 */
	public function delete( $key, $raw = false ) {
		return \delete_transient( $raw ? $key : $this->get_key( $key ) );
	}

	/**
	 * Tries to fix object cache implementations sometimes returning __PHP_Incomplete_Class.
	 *
	 * Originally based on http://stackoverflow.com/a/1173769/6646342 and refactored
	 * for PHP 7.2 compatibility.
	 *
	 * @param  object $object An object that should have been unserialized, but may be of __PHP_Incomplete_Class.
	 *
	 * @return object         The object with its real class.
	 */
	protected function maybe_fix_object( $object ) {
		if ( '__PHP_Incomplete_Class' === \get_class( $object ) ) {
			$object = \unserialize( \serialize( $object ) ); // phpcs:disable WordPress.PHP.DiscouragedPHPFunctions.serialize_unserialize,WordPress.PHP.DiscouragedPHPFunctions.serialize_serialize
		}

		return $object;
	}
}


1		<?php
2		/**
3		* This file is part of mundschenk-at/wp-data-storage.
4		*
5		* Copyright 2017-2019 Peter Putzer.
6		*
7		* This program is free software; you can redistribute it and/or
8		* modify it under the terms of the GNU General Public License
9		* as published by the Free Software Foundation; either version 2
10		* of the License, or ( at your option ) any later version.
11		*
12		* This program is distributed in the hope that it will be useful,
13		* but WITHOUT ANY WARRANTY; without even the implied warranty of
14		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15		* GNU General Public License for more details.
16		*
17		* You should have received a copy of the GNU General Public License
18		* along with this program; if not, write to the Free Software
19		* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20		*
21		* @package mundschenk-at/wp-data-storage/tests
22		* @license http://www.gnu.org/licenses/gpl-2.0.html
23		*/
24
25		namespace Mundschenk\Data_Storage;
26
27		/**
28		* Implements an interface to the WordPress Transients API.
29		*
30		* @since 1.0.0
31		*
32		* @author Peter Putzer <[email protected]>
33		*/
34		class Transients extends Abstract_Cache {
35
36		const TRANSIENT_SQL_PREFIX = '_transient_';
37
38		/**
39		* The incrementor transient key.
40		*
41		* @var string
42		*/
43		protected $incrementor_key;
44
45		/**
46		* Create new cache instance.
47		*
48		* @param string $prefix The prefix automatically added to transient names.
49		*/
50	2	public function __construct( $prefix ) {
51	2	$this->incrementor_key = $prefix . 'transients_incrementor';
52	2	$this->incrementor = $this->get( $this->incrementor_key, true );
53
54	2	parent::__construct( $prefix );
55	2	}
56
57		/**
58		* Invalidate all cached elements by reseting the incrementor.
59		*/
60	4	public function invalidate() {
61
62	4	if ( ! \wp_using_ext_object_cache() ) {
63		// Clean up old transients.
64	2	foreach ( $this->get_keys_from_database() as $old_transient ) {
65	2	$this->delete( $old_transient, true );
66		}
67		}
68
69		// Update incrementor.
70	4	$this->incrementor = time();
71	4	$this->set( $this->incrementor_key, $this->incrementor, 0, true );
72	4	}
73
74		/**
75		* Retrieves a list of transients set by the plugin from the options table.
76		*
77		* @return string[]
78		*/
79	1	public function get_keys_from_database() {
80		/**
81		* WordPress database handler.
82		*
83		* @var \wpdb
84		*/
85	1	global $wpdb;
86
87	1	$results = $wpdb->get_results(
88	1	$wpdb->prepare(
89	1	"SELECT option_name FROM {$wpdb->options} WHERE option_name like %s",
90	1	static::TRANSIENT_SQL_PREFIX . "{$this->get_prefix()}%"
91		),
92	1	ARRAY_A
93		); // WPCS: db call ok, cache ok.
94
95	1	return \str_replace( static::TRANSIENT_SQL_PREFIX, '', \wp_list_pluck( $results, 'option_name' ) );
96		}
97
98		/**
99		* Retrieves a cached value.
100		*
101		* @param string $key The cache key.
102		* @param bool $raw Optional. Use the raw key name (i.e. don't call get_key). Default false.
103		*
104		* @return mixed
105		*/
106	1	public function get( $key, $raw = false ) {
107	1	return \get_transient( $raw ? $key : $this->get_key( $key ) );
108		}
109
110		/**
111		* Retrieves a cached large object.
112		*
113		* @param string $key The cache key.
114		*
115		* @return mixed
116		*/
117	6	public function get_large_object( $key ) {
118	6	$encoded = $this->get( $key );
119	6	if ( false === $encoded ) {
120	2	return false;
121		}
122
123	4	$uncompressed = @\gzdecode( \base64_decode( $encoded ) ); // @codingStandardsIgnoreLine
124	4	if ( false === $uncompressed ) {
125	2	return false;
126		}
127
128	2	return $this->maybe_fix_object( \unserialize( $uncompressed ) ); // @codingStandardsIgnoreLine
129		}
130
131		/**
132		* Sets an entry in the cache and stores the key.
133		*
134		* @param string $key The cache key.
135		* @param mixed $value The value to store.
136		* @param int $duration Optional. The duration in seconds. Default 0 (no expiration).
137		* @param bool $raw Optional. Use the raw key name (i.e. don't call get_key). Default false.
138		*
139		* @return bool True if the cache could be set successfully.
140		*/
141	1	public function set( $key, $value, $duration = 0, $raw = false ) {
142	1	return \set_transient( $raw ? $key : $this->get_key( $key ), $value, $duration );
143		}
144
145		/**
146		* Sets a transient for a large PHP object. The object will be stored in
147		* serialized and gzip encoded form using Base64 encoding to ensure binary safety.
148		*
149		* @param string $key The cache key.
150		* @param mixed $value The value to store.
151		* @param int $duration Optional. The duration in seconds. Default 0 (no expiration).
152		*
153		* @return bool True if the cache could be set successfully.
154		*/
155	2	public function set_large_object( $key, $value, $duration = 0 ) {
156	2	$compressed = \gzencode( \serialize( $value ) ); // @codingStandardsIgnoreLine
157
158	2	if ( false === $compressed ) {
159		return false; // @codeCoverageIgnore
160		}
161
162		// base64_encode() is used to safely store the gzipped serialized object
163		// in the WordPress database.
164	2	return $this->set( $key, \base64_encode( $compressed ), $duration ); // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode
165		}
166
167		/**
168		* Deletes an entry from the cache.
169		*
170		* @param string $key The cache key root.
171		* @param bool $raw Optional. Use the raw key name (i.e. don't call get_key). Default false.
172		*
173		* @return bool True on successful removal, false on failure.
174		*/
175	1	public function delete( $key, $raw = false ) {
176	1	return \delete_transient( $raw ? $key : $this->get_key( $key ) );
177		}
178
179		/**
180		* Tries to fix object cache implementations sometimes returning __PHP_Incomplete_Class.
181		*
182		* Originally based on http://stackoverflow.com/a/1173769/6646342 and refactored
183		* for PHP 7.2 compatibility.
184		*
185		* @param object $object An object that should have been unserialized, but may be of __PHP_Incomplete_Class.
186		*
187		* @return object The object with its real class.
188		*/
189	2	protected function maybe_fix_object( $object ) {
190	2	if ( '__PHP_Incomplete_Class' === \get_class( $object ) ) {
191	2	$object = \unserialize( \serialize( $object ) ); // phpcs:disable WordPress.PHP.DiscouragedPHPFunctions.serialize_unserialize,WordPress.PHP.DiscouragedPHPFunctions.serialize_serialize
192		}
193
194	2	return $object;
195		}
196		}
197

mundschenk-at / wp-data-storage

Transients::invalidate() A last analyzed 2019-02-08 20:28 UTC

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Transients::invalidate() A
last analyzed 2019-02-08 20:28 UTC