Viewing file:  Once.php (1.86 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
<?php
namespace Illuminate\Support;
use WeakMap;
class Once
{
/**
* The current globally used instance.
*
* @var static|null
*/
protected static ?self $instance = null;
/**
* Indicates if the once instance is enabled.
*
* @var bool
*/
protected static bool $enabled = true;
/**
* Create a new once instance.
*
* @param \WeakMap<object, array<string, mixed>> $values
*/
protected function __construct(protected WeakMap $values)
{
//
}
/**
* Create a new once instance.
*
* @return static
*/
public static function instance()
{
return static::$instance ??= new static(new WeakMap);
}
/**
* Get the value of the given onceable.
*
* @param Onceable $onceable
* @return mixed
*/
public function value(Onceable $onceable)
{
if (! static::$enabled) {
return call_user_func($onceable->callable);
}
$object = $onceable->object ?: $this;
$hash = $onceable->hash;
if (! isset($this->values[$object])) {
$this->values[$object] = [];
}
if (array_key_exists($hash, $this->values[$object])) {
return $this->values[$object][$hash];
}
return $this->values[$object][$hash] = call_user_func($onceable->callable);
}
/**
* Re-enable the once instance if it was disabled.
*
* @return void
*/
public static function enable()
{
static::$enabled = true;
}
/**
* Disable the once instance.
*
* @return void
*/
public static function disable()
{
static::$enabled = false;
}
/**
* Flush the once instance.
*
* @return void
*/
public static function flush()
{
static::$instance = null;
}
}
|