File "DeferredCallbackCollection.php"
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<?php
namespace Illuminate\Support\Defer;
use ArrayAccess;
use Closure;
use Countable;
class DeferredCallbackCollection implements ArrayAccess, Countable
{
/**
* All of the deferred callbacks.
*
* @var array
*/
protected array $callbacks = [];
/**
* Get the first callback in the collection.
*
* @return callable
*/
public function first()
{
return array_values($this->callbacks)[0];
}
/**
* Invoke the deferred callbacks.
*
* @return void
*/
public function invoke(): void
{
$this->invokeWhen(fn () => true);
}
/**
* Invoke the deferred callbacks if the given truth test evaluates to true.
*
* @param \Closure|null $when
* @return void
*/
public function invokeWhen(?Closure $when = null): void
{
$when ??= fn () => true;
$this->forgetDuplicates();
foreach ($this->callbacks as $index => $callback) {
if ($when($callback)) {
rescue($callback);
}
unset($this->callbacks[$index]);
}
}
/**
* Remove any deferred callbacks with the given name.
*
* @param string $name
* @return void
*/
public function forget(string $name): void
{
$this->callbacks = collect($this->callbacks)
->reject(fn ($callback) => $callback->name === $name)
->values()
->all();
}
/**
* Remove any duplicate callbacks.
*
* @return $this
*/
protected function forgetDuplicates(): self
{
$this->callbacks = collect($this->callbacks)
->reverse()
->unique(fn ($c) => $c->name)
->reverse()
->values()
->all();
return $this;
}
/**
* Determine if the collection has a callback with the given key.
*
* @param mixed $offset
* @return bool
*/
public function offsetExists(mixed $offset): bool
{
$this->forgetDuplicates();
return isset($this->callbacks[$offset]);
}
/**
* Get the callback with the given key.
*
* @param mixed $offset
* @return mixed
*/
public function offsetGet(mixed $offset): mixed
{
$this->forgetDuplicates();
return $this->callbacks[$offset];
}
/**
* Set the callback with the given key.
*
* @param mixed $offset
* @param mixed $value
* @return void
*/
public function offsetSet(mixed $offset, mixed $value): void
{
if (is_null($offset)) {
$this->callbacks[] = $value;
} else {
$this->callbacks[$offset] = $value;
}
}
/**
* Remove the callback with the given key from the collection.
*
* @param mixed $offset
* @return void
*/
public function offsetUnset(mixed $offset): void
{
$this->forgetDuplicates();
unset($this->callbacks[$offset]);
}
/**
* Determine how many callbacks are in the collection.
*
* @return int
*/
public function count(): int
{
$this->forgetDuplicates();
return count($this->callbacks);
}
}