namespace Illuminate\Cache; use Closure; use DateTime; use ArrayAccess; use Carbon\Carbon; use BadMethodCallException; use Illuminate\Contracts\Cache\Store; use Illuminate\Support\Traits\Macroable; use Illuminate\Contracts\Events\Dispatcher; use Illuminate\Contracts\Cache\Repository as CacheContract; // a namespace be used enough class Repository implements CacheContract, ArrayAccess {// two interface that should be implements by Repository use Macroable { __call as macroCall; }// use Macroable that we will be a __call /** * The cache store implementation. * The cache store * @var \Illuminate\Contracts\Cache\Store */ protected $store;// a Cache Store instance of the implementation /** * The event dispatcher implementation. * * @var \Illuminate\Contracts\Events\Dispatcher */ protected $events;// The event dispatcher implementation a events interface /** * The default number of minutes to store items. * * @var int */ protected $default = 60; // a normal time[minutes]or[seconds] to set the value into the store items . // normal set it is 60 second /** * Create a new cache repository instance. * * @param \Illuminate\Contracts\Cache\Store $store * @return void */ public function __construct(Store $store) { $this->store = $store; }// a big __set to Create a new instance about Cache, repository // a library to store. /** * Set the event dispatcher instance. * * @param \Illuminate\Contracts\Events\Dispatcher $events * @return void */ public function setEventDispatcher(Dispatcher $events) { $this->events = $events; }// Set the event dispatcher instance. // a big set to the events. /** * Fire an event for this cache instance. * * @param string $event * @param array $payload * @return void */ // Fire an event for this cache instance. protected function fireCacheEvent($event, $payload)// fire cache event { if (! isset($this->events)) { return; }// check this is a normal events switch ($event) {// this->events is a instance about a class, then the events is a way or a type case 'hit':// case hit: if (count($payload) == 2) { $payload[] = []; } return $this->events->fire(new Events\CacheHit($payload[0], $payload[1], $payload[2])); case 'missed':// case missed: if (count($payload) == 1) { $payload[] = []; } return $this->events->fire(new Events\CacheMissed($payload[0], $payload[1])); case 'delete':// case delete: if (count($payload) == 1) { $payload[] = []; } return $this->events->fire(new Events\KeyForgotten($payload[0], $payload[1])); case 'write':// cache write: if (count($payload) == 3) { $payload[] = []; } return $this->events->fire(new Events\KeyWritten($payload[0], $payload[1], $payload[2], $payload[3])); } }// a switch way to change the result /** * Determine if an item exists in the cache. * * @param string $key * @return bool */ public function has($key) { return ! is_null($this->get($key)); }// determine[check] the item has exists in the cache. /** * Retrieve an item from the cache by key. Retrieve an item from the cache by key. * * @param string $key * @param mixed $default * @return mixed */ public function get($key, $default = null)// get item by key. { if (is_array($key)) { return $this->many($key); }// the key is a array ,will back a item array by many. $value = $this->store->get($this->itemKey($key));// get item[value] by key if (is_null($value)) {// null the value $this->fireCacheEvent('missed', [$key]);//missed $value = value($default); } else { $this->fireCacheEvent('hit', [$key, $value]);// hit } return $value; } /** * Retrieve multiple items from the cache by key.// Retrieve multiple items from the cache * * Items not found in the cache will have a null value.// items not found in the cache will have a null value * * @param array $keys * @return array */ public function many(array $keys) { $normalizedKeys = []; foreach ($keys as $key => $value) { $normalizedKeys[] = is_string($key) ? $key : $value; } $values = $this->store->many($normalizedKeys); foreach ($values as $key => &$value) { if (is_null($value)) { $this->fireCacheEvent('missed', [$key]); $value = isset($keys[$key]) ? value($keys[$key]) : null; } else { $this->fireCacheEvent('hit', [$key, $value]); } } return $values; }
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