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