Cache::delete() - Code Metrics - Inspection of "changes for phpmd" - kemist80/Cache - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — develop ( 26829c...31abed )

by Da Phuture

created 2016-09-15 08:59 UTC

Cache::delete() B

↳ Parent: Cache

Complexity

Conditions	5
Paths	7

Size

Total Lines	17
Code Lines	11

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	17
rs	8.8571
c	0
b	0
f	0
cc	5
eloc	11
nc	7
nop	1

<?php

namespace Kemist\Cache;

use Kemist\Cache\Storage\StorageInterface;

/**
 * Cache object for caching variables
 * 
 * @package Kemist\Cache
 * 
 * @version 1.2.0
 */
class Cache {

  /**
   * Cache storage object
   * @var StorageInterface
   */
  protected $storage;

  /**
   * Caching is enabled
   * @var bool 
   */
  protected $enabled = true;

  /**
   * Key name encryption
   * @var bool 
   */
  protected $encryptKeys = true;

  /**
   * Cache values information
   * @var Info
   */
  protected $info;

  /**
   * Read key names
   * @var array 
   */
  protected $readKeys = array();

  /**
   * System reserved info key
   * @var string 
   */
  protected $infoKey = '_system.info';

  /**
   * Initialised (-1: not yet, 0: in progress, 1: initialised)
   * @var int 
   */
  protected $initialised = -1;

  const STORE_METHOD_SERIALIZE = 1;
  const STORE_METHOD_JSON = 2;

  /**
   * Constructor 
   * 
   * @param StorageInterface $storage
   * @param array $options
   */
  public function __construct(StorageInterface $storage, array $options = array()) {
    $this->storage = $storage;
    $this->enabled = (isset($options['enabled']) ? $options['enabled'] : true);
    $this->encryptKeys = (isset($options['encrypt_keys']) ? $options['encrypt_keys'] : true);
    $this->info = new Info();
  }

  /**
   * Initialise (lazy)
   */
  public function init() {
    if ($this->initialised > -1) {
      return true;
    }

    // Initialising in progress 
    $this->initialised = 0;
    $this->storage->init();

    if ($this->has($this->infoKey)) {
      $info = (array) $this->getOrStore($this->infoKey, array());
      array_walk($info, array($this, 'handleExpiration'));
      $this->info->setData($info);
    }
    $this->initialised = 1;
    return true;
  }

  /**
   * Handles cached value expiration
   * 
   * @param array $data
   * @param string $key
   * 
   * @return boolean
   */
  protected function handleExpiration($data, $key) {
    if (!isset($data['expiry']) || $data['expiry'] == 0) {
      return true;
    } elseif (!$this->has($key)) {
      unset($this->info[$key]);
    } elseif (time() > $data['expiry']) {
      $this->delete($key);
    }
  }

  /**
   * Gets Cache info
   * 
   * @param $name Cache key
   * 
   * @return array
   */
  public function getInfo($name = '') {
    if (!$this->isEnabled()) {
      return false;
    }

    $this->init();
    return $this->info->getData($name);
  }

  /**
   * Check if Cache is enabled
   * 
   * @return bool
   */
  public function isEnabled() {
    return $this->enabled;
  }

  /**
   * Enable/disable caching
   * 
   * @param bool $enabled
   */
  public function setEnabled($enabled) {
    $this->enabled = (bool) $enabled;
  }

  /**
   * Checks if the specified name in cache exists
   * 	 
   * @param string $name cache name
   *
   * @return bool
   */
  public function has($name) {
    if (!$this->isEnabled()) {
      return false;
    }

    $this->init();
    $secret = $this->encryptKey($name);
    return ($this->storage->has($secret) && ($name == $this->infoKey || isset($this->info[$name])));
  }

  /**
   * Deletes the specified cache or each one if '' given
   * 	 
   * @param string $name cache name
   *
   * @return bool
   */
  public function delete($name = '') {
    if (!$this->isEnabled()) {
      return false;
    }

    $this->init();
    $secret = ($name != '' ? $this->encryptKey($name) : $name);
    $ret = $this->storage->delete($secret);

    if ($name == '') {
      $this->info = new Info();
    } elseif (isset($this->info[$name])) {
      unset($this->info[$name]);
    }

    return $ret;
  }

  /**
   * Flush all from cache
   * 	 
   * @return bool
   */
  public function flush() {
    return $this->delete();
  }

  /**
   * Stores the variable to the $name cache
   * 	 
   * @param string $name cache name
   * @param mixed $val variable to be stored
   * @param bool $compressed Compressed storage
   * @param int|string $expiry Expires in the given seconds	(0:never) or the time defined by valid date string (eg. '2014-10-01' or '1week' or '2hours')
   * @param string $storeMethod Storing method (serialize|json)	 	 
   *
   * @return bool
   */
  public function store($name, $val, $compressed = false, $expiry = 0, $storeMethod = self::STORE_METHOD_SERIALIZE) {
    if (!$this->isEnabled()) {
      return false;
    }

    $this->init();
    $secret = $this->encryptKey($name);
    $data = $this->encode($val, $storeMethod);
    if (false !== $ret = $this->storage->store($secret, $data, $compressed)) {
      $expiry = ($expiry == 'never' ? 0 : $this->extractExpiryDate($expiry));

      if (!isset($this->info[$name])) {
        $this->info->createData($name);
      }

      $this->info->touchItem($name, array('last_access', 'last_write'));
      $this->info->appendData($name, array(
          'expiry' => $expiry,
          'size' => strlen($data),
          'compressed' => $compressed,
          'store_method' => $storeMethod,
      ));
      $this->info->increaseItem($name, 'write_count');
    }

    return $ret;
  }

  /**
   * Extracts expiry by string
   * 
   * @param mixed $expiry
   * 
   * @return int
   */
  protected function extractExpiryDate($expiry) {
    if (is_string($expiry)) {
      if (strtotime($expiry) === false) {
        throw new \InvalidArgumentException('Invalid date format!');
      }
      $date = new \DateTime($expiry);
      $expiry = $date->format('U') < time() ? 0 : $date->format('U');
    } elseif ((int) $expiry > 0) {
      $expiry = ($expiry < time() ? time() + $expiry : $expiry);
    } else {
      $expiry = 0;
    }

    return $expiry;
  }

  /**
   * Retrieves the content of $name cache
   * 	 
   * @param string $name cache name
   * @param mixed $default
   * 	 
   * @return mixed
   */
  public function get($name, $default = null) {
    if (!$this->isEnabled() || ($this->init() && $name != $this->infoKey && !isset($this->info[$name]))) {
      $this->storage->miss();
      return $this->processDefault($default);
    }

    list($compressed, $storeMethod) = $this->extractParameters($name);
    $secret = $this->encryptKey($name);
    $raw = $this->storage->get($secret, $compressed);

    $ret = $this->decode($raw, $storeMethod);

    if ($ret !== null) {
      $this->info->touchItem($name, array('last_access', 'last_read'));
      $this->info->increaseItem($name, 'read_count');
      $this->readKeys[] = $name;
      array_unique($this->readKeys);
    } else {
      $this->info->deleteData($name);
    }

    return $ret;
  }

  /**
   * Extract cached value parameters
   * 
   * @param string $name
   * 
   * @return array
   */
  protected function extractParameters($name) {
    $compressed = ($name == $this->infoKey ? true : $this->info->getItem($name, 'compressed'));
    $storeMethod = ($name == $this->infoKey ? self::STORE_METHOD_JSON : $this->info->getItem($name, 'store_method'));
    return array($compressed, $storeMethod);
  }

  /**
   * Attempts to get a value and if not exists store the given default variable
   * 
   * @param string $name cache name
   * @param mixed $default default value
   * @param bool $compressed Compressed storage
   * @param int|string $expiry Expires in the given seconds	(0:never) or the time defined by valid date string (eg. '2014-10-01' or '1week' or '2hours')
   * @param int $storeMethod Storing method (serialize|json)	 	 
   * 
   * @return mixed
   */
  public function getOrStore($name, $default, $compressed = false, $expiry = 0, $storeMethod = self::STORE_METHOD_SERIALIZE) {
    if ($this->has($name)) {
      return $this->get($name);
    }
    $value = $this->processDefault($default);
    $this->store($name, $value, $compressed, $expiry, $storeMethod);
    return $value;
  }

  /**
   * Retrieves and deletes value from cache
   * 
   * @param string $name
   * 
   * @return mixed
   */
  public function pull($name) {
    $ret = $this->get($name);
    $this->delete($name);
    return $ret;
  }

  /**
   * Retrieves information of Cache state
   * 
   * @param bool $getFields
   * 	 
   * @return array|bool
   */
  public function info($getFields = false) {
    if (!$this->isEnabled()) {
      return false;
    }
    $this->init();
    return $this->storage->info($getFields);
  }

  /**
   * Encodes variable with the specified method
   * 
   * @param mixed $var Variable
   * @param int $storeMethod serialize|json	 	 	 
   * 	 
   * @return mixed
   */
  protected function encode($var, $storeMethod = self::STORE_METHOD_SERIALIZE) {
    switch ($storeMethod) {
      case self::STORE_METHOD_JSON:
        $var = json_encode($var);
        break;
      case self::STORE_METHOD_SERIALIZE:
      default:
        $var = serialize($var);
    }
    return $var;
  }

  /**
   * Decodes variable with the specified method
   * 
   * @param mixed $var Variable
   * @param int $storeMethod serialize|json	 	 	 
   * 	 
   * @return mixed
   */
  protected function decode($var, $storeMethod = self::STORE_METHOD_SERIALIZE) {
    if (!$var) {
      return null;
    }

    switch ($storeMethod) {
      case self::STORE_METHOD_JSON:
        $var = json_decode($var, true);
        break;
      case self::STORE_METHOD_SERIALIZE:
      default:
        $var = unserialize($var);
    }

    return $var;
  }

  /**
   * Encrypts key
   * 
   * @param string $key
   * 
   * @return string
   */
  protected function encryptKey($key) {
    return ($this->encryptKeys ? sha1($key) : $key);
  }

  /**
   * Gets cache hits
   * 
   * @return int
   */
  public function getHits() {
    if (!$this->isEnabled()) {
      return 0;
    }
    $this->init();
    return $this->storage->getHits();
  }

  /**
   * Gets cache misses
   * 
   * @return int
   */
  public function getMisses() {
    if (!$this->isEnabled()) {
      return 0;
    }
    $this->init();
    return $this->storage->getMisses();
  }

  /**
   * Stores cache values expiral information into cache
   */
  public function writeExpirals() {
    if (!$this->isEnabled() || $this->initialised < 1) {
      return false;
    }
    return $this->store($this->infoKey, $this->info->getData(), true, 0, self::STORE_METHOD_JSON);
  }

  /**
   * Gets expiry information of a cached value (0: never)
   * 
   * @param string $name Cache name
   * @param string $format Date format
   * 	 
   * @return string
   */
  public function getExpiry($name, $format = 'U') {
    if (!$this->isEnabled()) {
      return false;
    }
    $this->init();
    return $this->info->getExpiry($name, $format);
  }

  /**
   * Calculates Time To Live
   * 
   * @param string $name
   * 
   * @return int
   */
  public function getTTL($name) {
    $expiry = $this->getExpiry($name);
    return ($expiry > 0 ? (int) $expiry - (int) $this->getCreated($name) : 0);
  }

  /**
   * Modifies expiry by setting Time To Live
   * 
   * @param string $name
   * @param int $ttl
   */
  public function setTTL($name, $ttl) {
    if ($this->canModify($name)) {
      $created = (int) $this->getCreated($name);
      $ttl = (int) $ttl;
      $this->info->setItem($name, 'expiry', ($ttl <= 0 ? 0 : $created + $ttl));
    }
  }

  /**
   * Modifies expiry
   * 
   * @param string $name
   * @param mixed $expiry
   */
  public function setExpiry($name, $expiry) {
    if ($this->canModify($name)) {
      $this->info->setItem($name, 'expiry', $this->extractExpiryDate($expiry));
    }
  }

  /**
   * Gets created (first write) time of a cached value
   * 
   * @param string $name Cache name
   * @param string $format Date format
   * 	 
   * @return string
   */
  public function getCreated($name, $format = 'U') {
    return $this->info->getItem($name, 'created', 'date', $format);
  }

  /**
   * Gets last access (either read or write) time of a cached value
   * 
   * @param string $name Cache name
   * @param string $format Date format
   * 	 
   * @return string
   */
  public function getLastAccess($name, $format = 'U') {
    return $this->info->getItem($name, 'last_access', 'date', $format);
  }

  /**
   * Gets last read time of a cached value
   * 
   * @param string $name Cache name
   * @param string $format Date format
   * 	 
   * @return string
   */
  public function getLastRead($name, $format = 'U') {
    return $this->info->getItem($name, 'last_read', 'date', $format);
  }

  /**
   * Gets last write time of a cached value
   * 
   * @param string $name Cache name
   * @param string $format Date format
   * 	 
   * @return string
   */
  public function getLastWrite($name, $format = 'U') {
    return $this->info->getItem($name, 'last_write', 'date', $format);
  }

  /**
   * Gets read count of a cached value
   * 
   * @param string $name Cache name
   * 	 
   * @return int
   */
  public function getReadCount($name) {
    return $this->info->getItem($name, 'read_count', 'int');
  }

  /**
   * Gets write count of a cached value
   * 
   * @param string $name Cache name
   * 	 
   * @return int
   */
  public function getWriteCount($name) {
    return $this->info->getItem($name, 'write_count', 'int');
  }

  /**
   * Gets all cache key names
   *  	 
   * @return array
   */
  public function getKeys() {
    if (!$this->isEnabled()) {
      return false;
    }
    $this->init();
    return $this->info->getKeys();
  }

  /**
   * Gets cache key names which already read
   *  	 
   * @return array
   */
  public function getReadKeys() {
    return $this->readKeys;
  }

  /**
   * Gets storage object
   * 
   * @return StorageInterface
   */
  public function getStorage() {
    return $this->storage;
  }

  /**
   * Retrieves key encryption
   * 
   * @return bool
   */
  public function getEncryptKeys() {
    return $this->encryptKeys;
  }

  /**
   * Sets key encryption
   * 
   * @param bool $encryptKeys
   */
  public function setEncryptKeys($encryptKeys) {
    $this->encryptKeys = (bool) $encryptKeys;
  }

  /**
   * Sets cache storage
   * 
   * @param StorageInterface $storage
   */
  public function setStorage(StorageInterface $storage) {
    $this->storage = $storage;
  }

  /**
   * Destructor
   */
  public function __destruct() {
    $this->writeExpirals();
  }

  /**
   * Sets a tagged cache value
   * 	 
   * @param string $name cache name
   * @param mixed $val variable to be stored
   * @param array $tags tags
   * @param bool $compressed Compressed storage
   * @param int|string $expiry Expires in the given seconds	(0:never) or the time defined by valid date string (eg. '2014-10-01' or '1week' or '2hours')
   * @param int $storeMethod Storing method (serialize|json)	 	 
   *
   * @return bool
   */
  public function storeTagged($name, $val, $tags, $compressed = false, $expiry = 0, $storeMethod = self::STORE_METHOD_SERIALIZE) {
    if ($this->store($name, $val, $compressed, $expiry, $storeMethod)) {
      $this->prepareTags($tags);
      $this->info->setItem($name, 'tags', $tags);
      return true;
    }
  }

  /**
   * Gets tagged cache values
   * 
   * @param array $tags
   * 
   * @return array
   */
  public function getTagged($tags) {
    if (!$this->isEnabled()) {
      return false;
    }

    $this->init();
    $this->prepareTags($tags);
    $filtered = (array) $this->info->filterByTags($tags);
    $ret = array();
    foreach ($filtered as $key) {
      $ret[$key] = $this->get($key);
    }
    return $ret;
  }

  /**
   * Gets tags of a cached variable
   * 
   * @param string $key
   * 
   * @return array
   */
  public function getTags($key) {
    if (!$this->isEnabled()) {
      return false;
    }

    $this->init();
    $ret = $this->info->getItem($key, 'tags', 'array');
    sort($ret);
    return $ret;
  }

  /**
   * Sets tags of a cached variable
   * 
   * @param string $name
   * @param array $tags
   * 
   * @return array
   */
  public function setTags($name, $tags) {
    if ($this->canModify($name)) {
      $this->prepareTags($tags);
      return $this->info->setItem($name, 'tags', $tags);
    }
    return false;
  }

  /**
   * Adds tags for a cached variable
   * 
   * @param string $name
   * @param array $tags
   * 
   * @return array
   */
  public function addTags($name, $tags) {
    if ($this->canModify($name)) {
      $this->prepareTags($tags);
      $tags = array_unique(array_merge($this->getTags($name), $tags));
      return $this->setTags($name, $tags);
    }
    return false;
  }

  /**
   * Deletes cache values matching the given tags
   * 
   * @param array $tags
   * 
   * @return array
   */
  public function deleteTagged($tags) {
    if (!$this->isEnabled()) {
      return false;
    }

    $this->init();
    $this->prepareTags($tags);
    $filtered = (array) $this->info->filterByTags($tags);
    return array_map(array($this, 'delete'), $filtered);
  }

  /**
   * Gets all tags currently in use
   * 
   * @return array
   */
  public function getAllTags() {
    if (!$this->isEnabled()) {
      return false;
    }

    $this->init();
    $tags = array();
    foreach ($this->info as $info) {
      $tags = array_unique(array_merge($tags, $info['tags']));
    }
    sort($tags);
    return $tags;
  }

  /**
   * Prepares tags parameter
   * 
   * @param array|string $tags
   */
  protected function prepareTags(&$tags) {
    if (!is_array($tags)) {
      $tags = array($tags);
    }
    $tags = array_unique($tags);
  }

  /**
   * Checks if cache value info can be modified (cache is enabled and value exists)
   * 
   * @param string $name
   * 
   * @return boolean
   */
  protected function canModify($name) {
    if (!$this->isEnabled()) {
      return false;
    }
    $this->init();
    return $this->has($name);
  }

  /**
   * Processes default value
   * 
   * @param \Closure|mixed $default
   * 
   * @return mixed
   */
  protected function processDefault($default) {
    return ($default instanceof \Closure ? call_user_func($default) : $default);
  }

}


1			<?php
2
3			namespace Kemist\Cache;
4
5			use Kemist\Cache\Storage\StorageInterface;
6
7			/**
8			* Cache object for caching variables
9			*
10			* @package Kemist\Cache
11			*
12			* @version 1.2.0
13			*/
14			class Cache {
15
16			/**
17			* Cache storage object
18			* @var StorageInterface
19			*/
20			protected $storage;
21
22			/**
23			* Caching is enabled
24			* @var bool
25			*/
26			protected $enabled = true;
27
28			/**
29			* Key name encryption
30			* @var bool
31			*/
32			protected $encryptKeys = true;
33
34			/**
35			* Cache values information
36			* @var Info
37			*/
38			protected $info;
39
40			/**
41			* Read key names
42			* @var array
43			*/
44			protected $readKeys = array();
45
46			/**
47			* System reserved info key
48			* @var string
49			*/
50			protected $infoKey = '_system.info';
51
52			/**
53			* Initialised (-1: not yet, 0: in progress, 1: initialised)
54			* @var int
55			*/
56			protected $initialised = -1;
57
58			const STORE_METHOD_SERIALIZE = 1;
59			const STORE_METHOD_JSON = 2;
60
61			/**
62			* Constructor
63			*
64			* @param StorageInterface $storage
65			* @param array $options
66			*/
67			public function __construct(StorageInterface $storage, array $options = array()) {
68			$this->storage = $storage;
69			$this->enabled = (isset($options['enabled']) ? $options['enabled'] : true);
70			$this->encryptKeys = (isset($options['encrypt_keys']) ? $options['encrypt_keys'] : true);
71			$this->info = new Info();
72			}
73
74			/**
75			* Initialise (lazy)
76			*/
77			public function init() {
78			if ($this->initialised > -1) {
79			return true;
80			}
81
82			// Initialising in progress
83			$this->initialised = 0;
84			$this->storage->init();
85
86			if ($this->has($this->infoKey)) {
87			$info = (array) $this->getOrStore($this->infoKey, array());
88			array_walk($info, array($this, 'handleExpiration'));
89			$this->info->setData($info);
90			}
91			$this->initialised = 1;
92			return true;
93			}
94
95			/**
96			* Handles cached value expiration
97			*
98			* @param array $data
99			* @param string $key
100			*
101			* @return boolean
102			*/
103			protected function handleExpiration($data, $key) {
104			if (!isset($data['expiry']) \|\| $data['expiry'] == 0) {
105			return true;
106			} elseif (!$this->has($key)) {
107			unset($this->info[$key]);
108			} elseif (time() > $data['expiry']) {
109			$this->delete($key);
110			}
111			}
112
113			/**
114			* Gets Cache info
115			*
116			* @param $name Cache key
117			*
118			* @return array
119			*/
120			public function getInfo($name = '') {
121			if (!$this->isEnabled()) {
122			return false;
123			}
124
125			$this->init();
126			return $this->info->getData($name);
127			}
128
129			/**
130			* Check if Cache is enabled
131			*
132			* @return bool
133			*/
134			public function isEnabled() {
135			return $this->enabled;
136			}
137
138			/**
139			* Enable/disable caching
140			*
141			* @param bool $enabled
142			*/
143			public function setEnabled($enabled) {
144			$this->enabled = (bool) $enabled;
145			}
146
147			/**
148			* Checks if the specified name in cache exists
149			*
150			* @param string $name cache name
151			*
152			* @return bool
153			*/
154			public function has($name) {
155			if (!$this->isEnabled()) {
156			return false;
157			}
158
159			$this->init();
160			$secret = $this->encryptKey($name);
161			return ($this->storage->has($secret) && ($name == $this->infoKey \|\| isset($this->info[$name])));
162			}
163
164			/**
165			* Deletes the specified cache or each one if '' given
166			*
167			* @param string $name cache name
168			*
169			* @return bool
170			*/
171			public function delete($name = '') {
172			if (!$this->isEnabled()) {
173			return false;
174			}
175
176			$this->init();
177			$secret = ($name != '' ? $this->encryptKey($name) : $name);
178			$ret = $this->storage->delete($secret);
179
180			if ($name == '') {
181			$this->info = new Info();
182			} elseif (isset($this->info[$name])) {
183			unset($this->info[$name]);
184			}
185
186			return $ret;
187			}
188
189			/**
190			* Flush all from cache
191			*
192			* @return bool
193			*/
194			public function flush() {
195			return $this->delete();
196			}
197
198			/**
199			* Stores the variable to the $name cache
200			*
201			* @param string $name cache name
202			* @param mixed $val variable to be stored
203			* @param bool $compressed Compressed storage
204			* @param int\|string $expiry Expires in the given seconds (0:never) or the time defined by valid date string (eg. '2014-10-01' or '1week' or '2hours')
205			* @param string $storeMethod Storing method (serialize\|json)
206			*
207			* @return bool
208			*/
209			public function store($name, $val, $compressed = false, $expiry = 0, $storeMethod = self::STORE_METHOD_SERIALIZE) {
210			if (!$this->isEnabled()) {
211			return false;
212			}
213
214			$this->init();
215			$secret = $this->encryptKey($name);
216			$data = $this->encode($val, $storeMethod);
217			if (false !== $ret = $this->storage->store($secret, $data, $compressed)) {
218			$expiry = ($expiry == 'never' ? 0 : $this->extractExpiryDate($expiry));
219
220			if (!isset($this->info[$name])) {
221			$this->info->createData($name);
222			}
223
224			$this->info->touchItem($name, array('last_access', 'last_write'));
225			$this->info->appendData($name, array(
226			'expiry' => $expiry,
227			'size' => strlen($data),
228			'compressed' => $compressed,
229			'store_method' => $storeMethod,
230			));
231			$this->info->increaseItem($name, 'write_count');
232			}
233
234			return $ret;
235			}
236
237			/**
238			* Extracts expiry by string
239			*
240			* @param mixed $expiry
241			*
242			* @return int
243			*/
244			protected function extractExpiryDate($expiry) {
245			if (is_string($expiry)) {
246			if (strtotime($expiry) === false) {
247			throw new \InvalidArgumentException('Invalid date format!');
248			}
249			$date = new \DateTime($expiry);
250			$expiry = $date->format('U') < time() ? 0 : $date->format('U');
251			} elseif ((int) $expiry > 0) {
252			$expiry = ($expiry < time() ? time() + $expiry : $expiry);
253			} else {
254			$expiry = 0;
255			}
256
257			return $expiry;
258			}
259
260			/**
261			* Retrieves the content of $name cache
262			*
263			* @param string $name cache name
264			* @param mixed $default
265			*
266			* @return mixed
267			*/
268			public function get($name, $default = null) {
269			if (!$this->isEnabled() \|\| ($this->init() && $name != $this->infoKey && !isset($this->info[$name]))) {
270			$this->storage->miss();
271			return $this->processDefault($default);
272			}
273
274			list($compressed, $storeMethod) = $this->extractParameters($name);
275			$secret = $this->encryptKey($name);
276			$raw = $this->storage->get($secret, $compressed);
			0 ignored issues – show Unused Code introduced 2016-09-15 09:04 UTC by Report Bug Copy Issue Report The call to `StorageInterface::get()` has too many arguments starting with `$compressed`. This check compares calls to functions or methods with their respective definitions. If the call has more arguments than are defined, it raises an issue. If a function is defined several times with a different number of parameters, the check may pick up the wrong definition and report false positives. One codebase where this has been known to happen is Wordpress. In this case you can add the `@ignore` PhpDoc annotation to the duplicate definition and it will be ignored. Loading history...
277			$ret = $this->decode($raw, $storeMethod);
278
279			if ($ret !== null) {
280			$this->info->touchItem($name, array('last_access', 'last_read'));
281			$this->info->increaseItem($name, 'read_count');
282			$this->readKeys[] = $name;
283			array_unique($this->readKeys);
284			} else {
285			$this->info->deleteData($name);
286			}
287
288			return $ret;
289			}
290
291			/**
292			* Extract cached value parameters
293			*
294			* @param string $name
295			*
296			* @return array
297			*/
298			protected function extractParameters($name) {
299			$compressed = ($name == $this->infoKey ? true : $this->info->getItem($name, 'compressed'));
300			$storeMethod = ($name == $this->infoKey ? self::STORE_METHOD_JSON : $this->info->getItem($name, 'store_method'));
301			return array($compressed, $storeMethod);
302			}
303
304			/**
305			* Attempts to get a value and if not exists store the given default variable
306			*
307			* @param string $name cache name
308			* @param mixed $default default value
309			* @param bool $compressed Compressed storage
310			* @param int\|string $expiry Expires in the given seconds (0:never) or the time defined by valid date string (eg. '2014-10-01' or '1week' or '2hours')
311			* @param int $storeMethod Storing method (serialize\|json)
312			*
313			* @return mixed
314			*/
315			public function getOrStore($name, $default, $compressed = false, $expiry = 0, $storeMethod = self::STORE_METHOD_SERIALIZE) {
316			if ($this->has($name)) {
317			return $this->get($name);
318			}
319			$value = $this->processDefault($default);
320			$this->store($name, $value, $compressed, $expiry, $storeMethod);
321			return $value;
322			}
323
324			/**
325			* Retrieves and deletes value from cache
326			*
327			* @param string $name
328			*
329			* @return mixed
330			*/
331			public function pull($name) {
332			$ret = $this->get($name);
333			$this->delete($name);
334			return $ret;
335			}
336
337			/**
338			* Retrieves information of Cache state
339			*
340			* @param bool $getFields
341			*
342			* @return array\|bool
343			*/
344			public function info($getFields = false) {
345			if (!$this->isEnabled()) {
346			return false;
347			}
348			$this->init();
349			return $this->storage->info($getFields);
350			}
351
352			/**
353			* Encodes variable with the specified method
354			*
355			* @param mixed $var Variable
356			* @param int $storeMethod serialize\|json
357			*
358			* @return mixed
359			*/
360			protected function encode($var, $storeMethod = self::STORE_METHOD_SERIALIZE) {
361			switch ($storeMethod) {
362			case self::STORE_METHOD_JSON:
363			$var = json_encode($var);
364			break;
365			case self::STORE_METHOD_SERIALIZE:
366			default:
367			$var = serialize($var);
368			}
369			return $var;
370			}
371
372			/**
373			* Decodes variable with the specified method
374			*
375			* @param mixed $var Variable
376			* @param int $storeMethod serialize\|json
377			*
378			* @return mixed
379			*/
380			protected function decode($var, $storeMethod = self::STORE_METHOD_SERIALIZE) {
381			if (!$var) {
382			return null;
383			}
384
385			switch ($storeMethod) {
386			case self::STORE_METHOD_JSON:
387			$var = json_decode($var, true);
388			break;
389			case self::STORE_METHOD_SERIALIZE:
390			default:
391			$var = unserialize($var);
392			}
393
394			return $var;
395			}
396
397			/**
398			* Encrypts key
399			*
400			* @param string $key
401			*
402			* @return string
403			*/
404			protected function encryptKey($key) {
405			return ($this->encryptKeys ? sha1($key) : $key);
406			}
407
408			/**
409			* Gets cache hits
410			*
411			* @return int
412			*/
413			public function getHits() {
414			if (!$this->isEnabled()) {
415			return 0;
416			}
417			$this->init();
418			return $this->storage->getHits();
419			}
420
421			/**
422			* Gets cache misses
423			*
424			* @return int
425			*/
426			public function getMisses() {
427			if (!$this->isEnabled()) {
428			return 0;
429			}
430			$this->init();
431			return $this->storage->getMisses();
432			}
433
434			/**
435			* Stores cache values expiral information into cache
436			*/
437			public function writeExpirals() {
438			if (!$this->isEnabled() \|\| $this->initialised < 1) {
439			return false;
440			}
441			return $this->store($this->infoKey, $this->info->getData(), true, 0, self::STORE_METHOD_JSON);
442			}
443
444			/**
445			* Gets expiry information of a cached value (0: never)
446			*
447			* @param string $name Cache name
448			* @param string $format Date format
449			*
450			* @return string
451			*/
452			public function getExpiry($name, $format = 'U') {
453			if (!$this->isEnabled()) {
454			return false;
455			}
456			$this->init();
457			return $this->info->getExpiry($name, $format);
458			}
459
460			/**
461			* Calculates Time To Live
462			*
463			* @param string $name
464			*
465			* @return int
466			*/
467			public function getTTL($name) {
468			$expiry = $this->getExpiry($name);
469			return ($expiry > 0 ? (int) $expiry - (int) $this->getCreated($name) : 0);
470			}
471
472			/**
473			* Modifies expiry by setting Time To Live
474			*
475			* @param string $name
476			* @param int $ttl
477			*/
478			public function setTTL($name, $ttl) {
479			if ($this->canModify($name)) {
480			$created = (int) $this->getCreated($name);
481			$ttl = (int) $ttl;
482			$this->info->setItem($name, 'expiry', ($ttl <= 0 ? 0 : $created + $ttl));
483			}
484			}
485
486			/**
487			* Modifies expiry
488			*
489			* @param string $name
490			* @param mixed $expiry
491			*/
492			public function setExpiry($name, $expiry) {
493			if ($this->canModify($name)) {
494			$this->info->setItem($name, 'expiry', $this->extractExpiryDate($expiry));
495			}
496			}
497
498			/**
499			* Gets created (first write) time of a cached value
500			*
501			* @param string $name Cache name
502			* @param string $format Date format
503			*
504			* @return string
505			*/
506			public function getCreated($name, $format = 'U') {
507			return $this->info->getItem($name, 'created', 'date', $format);
508			}
509
510			/**
511			* Gets last access (either read or write) time of a cached value
512			*
513			* @param string $name Cache name
514			* @param string $format Date format
515			*
516			* @return string
517			*/
518			public function getLastAccess($name, $format = 'U') {
519			return $this->info->getItem($name, 'last_access', 'date', $format);
520			}
521
522			/**
523			* Gets last read time of a cached value
524			*
525			* @param string $name Cache name
526			* @param string $format Date format
527			*
528			* @return string
529			*/
530			public function getLastRead($name, $format = 'U') {
531			return $this->info->getItem($name, 'last_read', 'date', $format);
532			}
533
534			/**
535			* Gets last write time of a cached value
536			*
537			* @param string $name Cache name
538			* @param string $format Date format
539			*
540			* @return string
541			*/
542			public function getLastWrite($name, $format = 'U') {
543			return $this->info->getItem($name, 'last_write', 'date', $format);
544			}
545
546			/**
547			* Gets read count of a cached value
548			*
549			* @param string $name Cache name
550			*
551			* @return int
552			*/
553			public function getReadCount($name) {
554			return $this->info->getItem($name, 'read_count', 'int');
555			}
556
557			/**
558			* Gets write count of a cached value
559			*
560			* @param string $name Cache name
561			*
562			* @return int
563			*/
564			public function getWriteCount($name) {
565			return $this->info->getItem($name, 'write_count', 'int');
566			}
567
568			/**
569			* Gets all cache key names
570			*
571			* @return array
572			*/
573			public function getKeys() {
574			if (!$this->isEnabled()) {
575			return false;
576			}
577			$this->init();
578			return $this->info->getKeys();
579			}
580
581			/**
582			* Gets cache key names which already read
583			*
584			* @return array
585			*/
586			public function getReadKeys() {
587			return $this->readKeys;
588			}
589
590			/**
591			* Gets storage object
592			*
593			* @return StorageInterface
594			*/
595			public function getStorage() {
596			return $this->storage;
597			}
598
599			/**
600			* Retrieves key encryption
601			*
602			* @return bool
603			*/
604			public function getEncryptKeys() {
605			return $this->encryptKeys;
606			}
607
608			/**
609			* Sets key encryption
610			*
611			* @param bool $encryptKeys
612			*/
613			public function setEncryptKeys($encryptKeys) {
614			$this->encryptKeys = (bool) $encryptKeys;
615			}
616
617			/**
618			* Sets cache storage
619			*
620			* @param StorageInterface $storage
621			*/
622			public function setStorage(StorageInterface $storage) {
623			$this->storage = $storage;
624			}
625
626			/**
627			* Destructor
628			*/
629			public function __destruct() {
630			$this->writeExpirals();
631			}
632
633			/**
634			* Sets a tagged cache value
635			*
636			* @param string $name cache name
637			* @param mixed $val variable to be stored
638			* @param array $tags tags
639			* @param bool $compressed Compressed storage
640			* @param int\|string $expiry Expires in the given seconds (0:never) or the time defined by valid date string (eg. '2014-10-01' or '1week' or '2hours')
641			* @param int $storeMethod Storing method (serialize\|json)
642			*
643			* @return bool
644			*/
645			public function storeTagged($name, $val, $tags, $compressed = false, $expiry = 0, $storeMethod = self::STORE_METHOD_SERIALIZE) {
646			if ($this->store($name, $val, $compressed, $expiry, $storeMethod)) {
647			$this->prepareTags($tags);
648			$this->info->setItem($name, 'tags', $tags);
649			return true;
650			}
651			}
652
653			/**
654			* Gets tagged cache values
655			*
656			* @param array $tags
657			*
658			* @return array
659			*/
660			public function getTagged($tags) {
661			if (!$this->isEnabled()) {
662			return false;
663			}
664
665			$this->init();
666			$this->prepareTags($tags);
667			$filtered = (array) $this->info->filterByTags($tags);
668			$ret = array();
669			foreach ($filtered as $key) {
670			$ret[$key] = $this->get($key);
671			}
672			return $ret;
673			}
674
675			/**
676			* Gets tags of a cached variable
677			*
678			* @param string $key
679			*
680			* @return array
681			*/
682			public function getTags($key) {
683			if (!$this->isEnabled()) {
684			return false;
685			}
686
687			$this->init();
688			$ret = $this->info->getItem($key, 'tags', 'array');
689			sort($ret);
690			return $ret;
691			}
692
693			/**
694			* Sets tags of a cached variable
695			*
696			* @param string $name
697			* @param array $tags
698			*
699			* @return array
700			*/
701			public function setTags($name, $tags) {
702			if ($this->canModify($name)) {
703			$this->prepareTags($tags);
704			return $this->info->setItem($name, 'tags', $tags);
705			}
706			return false;
707			}
708
709			/**
710			* Adds tags for a cached variable
711			*
712			* @param string $name
713			* @param array $tags
714			*
715			* @return array
716			*/
717			public function addTags($name, $tags) {
718			if ($this->canModify($name)) {
719			$this->prepareTags($tags);
720			$tags = array_unique(array_merge($this->getTags($name), $tags));
721			return $this->setTags($name, $tags);
722			}
723			return false;
724			}
725
726			/**
727			* Deletes cache values matching the given tags
728			*
729			* @param array $tags
730			*
731			* @return array
732			*/
733			public function deleteTagged($tags) {
734			if (!$this->isEnabled()) {
735			return false;
736			}
737
738			$this->init();
739			$this->prepareTags($tags);
740			$filtered = (array) $this->info->filterByTags($tags);
741			return array_map(array($this, 'delete'), $filtered);
742			}
743
744			/**
745			* Gets all tags currently in use
746			*
747			* @return array
748			*/
749			public function getAllTags() {
750			if (!$this->isEnabled()) {
751			return false;
752			}
753
754			$this->init();
755			$tags = array();
756			foreach ($this->info as $info) {
757			$tags = array_unique(array_merge($tags, $info['tags']));
758			}
759			sort($tags);
760			return $tags;
761			}
762
763			/**
764			* Prepares tags parameter
765			*
766			* @param array\|string $tags
767			*/
768			protected function prepareTags(&$tags) {
769			if (!is_array($tags)) {
770			$tags = array($tags);
771			}
772			$tags = array_unique($tags);
773			}
774
775			/**
776			* Checks if cache value info can be modified (cache is enabled and value exists)
777			*
778			* @param string $name
779			*
780			* @return boolean
781			*/
782			protected function canModify($name) {
783			if (!$this->isEnabled()) {
784			return false;
785			}
786			$this->init();
787			return $this->has($name);
788			}
789
790			/**
791			* Processes default value
792			*
793			* @param \Closure\|mixed $default
794			*
795			* @return mixed
796			*/
797			protected function processDefault($default) {
798			return ($default instanceof \Closure ? call_user_func($default) : $default);
799			}
800
801			}
802

kemist80 / Cache

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