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<?php namespace Illuminate\Cache;
use Closure;
use DateTime;
use Carbon\Carbon;
class TaggedCache implements StoreInterface {
/**
* The cache store implementation.
*
* @var \Illuminate\Cache\StoreInterface
*/
protected $store;
/**
* The tag set instance.
*
* @var \Illuminate\Cache\TagSet
*/
protected $tags;
/**
* Create a new tagged cache instance.
*
* @param \Illuminate\Cache\StoreInterface $store
* @param \Illuminate\Cache\TagSet $tags
* @return void
*/
public function __construct(StoreInterface $store, TagSet $tags)
{
$this->tags = $tags;
$this->store = $store;
}
/**
* Determine if an item exists in the cache.
*
* @param string $key
* @return bool
*/
public function has($key)
{
return ! is_null($this->get($key));
}
/**
* Retrieve an item from the cache by key.
*
* @param string $key
* @param mixed $default
* @return mixed
*/
public function get($key, $default = null)
{
$value = $this->store->get($this->taggedItemKey($key));
return ! is_null($value) ? $value : value($default);
}
/**
* Store an item in the cache for a given number of minutes.
*
* @param string $key
* @param mixed $value
* @param \DateTime|int $minutes
* @return void
*/
public function put($key, $value, $minutes)
{
$minutes = $this->getMinutes($minutes);
if ( ! is_null($minutes))
{
$this->store->put($this->taggedItemKey($key), $value, $minutes);
}
}
/**
* Store an item in the cache if the key does not exist.
*
* @param string $key
* @param mixed $value
* @param \DateTime|int $minutes
* @return bool
*/
public function add($key, $value, $minutes)
{
if (is_null($this->get($key)))
{
$this->put($key, $value, $minutes); return true;
}
return false;
}
/**
* Increment the value of an item in the cache.
*
* @param string $key
* @param mixed $value
* @return void
*/
public function increment($key, $value = 1)
{
$this->store->increment($this->taggedItemKey($key), $value);
}
/**
* Increment the value of an item in the cache.
*
* @param string $key
* @param mixed $value
* @return void
*/
public function decrement($key, $value = 1)
{
$this->store->decrement($this->taggedItemKey($key), $value);
}
/**
* Store an item in the cache indefinitely.
*
* @param string $key
* @param mixed $value
* @return void
*/
public function forever($key, $value)
{
$this->store->forever($this->taggedItemKey($key), $value);
}
/**
* Remove an item from the cache.
*
* @param string $key
* @return bool
*/
public function forget($key)
{
return $this->store->forget($this->taggedItemKey($key));
}
/**
* Remove all items from the cache.
*
* @return void
*/
public function flush()
{
$this->tags->reset();
}
/**
* Get an item from the cache, or store the default value.
*
* @param string $key
* @param \DateTime|int $minutes
* @param \Closure $callback
* @return mixed
*/
public function remember($key, $minutes, Closure $callback)
{
// If the item exists in the cache we will just return this immediately
// otherwise we will execute the given Closure and cache the result
// of that execution for the given number of minutes in storage.
if ($this->has($key)) return $this->get($key);
$this->put($key, $value = $callback(), $minutes);
return $value;
}
/**
* Get an item from the cache, or store the default value forever.
*
* @param string $key
* @param \Closure $callback
* @return mixed
*/
public function sear($key, Closure $callback)
{
return $this->rememberForever($key, $callback);
}
/**
* Get an item from the cache, or store the default value forever.
*
* @param string $key
* @param \Closure $callback
* @return mixed
*/
public function rememberForever($key, Closure $callback)
{
// If the item exists in the cache we will just return this immediately
// otherwise we will execute the given Closure and cache the result
// of that execution for the given number of minutes. It's easy.
if ($this->has($key)) return $this->get($key);
$this->forever($key, $value = $callback());
return $value;
}
/**
* Get a fully qualified key for a tagged item.
*
* @param string $key
* @return string
*/
public function taggedItemKey($key)
{
return sha1($this->tags->getNamespace()).':'.$key;
}
/**
* Get the cache key prefix.
*
* @return string
*/
public function getPrefix()
{
return $this->store->getPrefix();
}
/**
* Calculate the number of minutes with the given duration.
*
* @param \DateTime|int $duration
* @return int|null
*/
protected function getMinutes($duration)
{
if ($duration instanceof DateTime)
{
$fromNow = Carbon::instance($duration)->diffInMinutes();
return $fromNow > 0 ? $fromNow : null;
}
return is_string($duration) ? (int) $duration : $duration;
}
}
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