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<?php namespace ElementPack\Base\Support; use ArrayAccess; use ArrayObject; class Optional implements ArrayAccess { /** * The underlying object. * * @var mixed */ protected $value; /** * Create a new optional instance. * * @param mixed $value * @return void */ public function __construct($value) { $this->value = $value; } /** * Dynamically access a property on the underlying object. * * @param string $key * @return mixed */ public function __get($key) { if (is_object($this->value)) { return isset($this->value->{$key}) ? $this->value->{$key} : null; } } /** * Dynamically check a property exists on the underlying object. * * @param mixed $name * @return bool */ public function __isset($name) { if (is_object($this->value)) { return isset($this->value->{$name}); } if (is_array($this->value) || $this->value instanceof ArrayObject) { return isset($this->value[$name]); } return false; } /** * Determine if an item exists at an offset. * * @param mixed $key * @return bool */ public function offsetExists($key): bool { return $this->accessible($this->value) && $this->exists($this->value, $key); } protected function accessible($value) { return is_array($value) || $value instanceof ArrayAccess; } protected function exists($array, $key) { if ($array instanceof ArrayAccess) { return $array->offsetExists($key); } return array_key_exists($key, $array); } /** * Get an item at a given offset. * * @param mixed $key * @return mixed */ #[\ReturnTypeWillChange] public function offsetGet($key) { return $this->get($this->value, $key); } protected function get($array, $key, $default = null) { if (!$this->accessible($array)) { return $this->value($default); } if (is_null($key)) { return $array; } if ($this->exists($array, $key)) { return $array[$key]; } if (strpos($key, '.') === false) { return isset($array[$key]) ? $array[$key] : $this->value($default); } foreach (explode('.', $key) as $segment) { if ($this->accessible($array) && $this->exists($array, $segment)) { $array = $array[$segment]; } else { return $this->value($default); } } return $array; } protected function value($value) { return $value instanceof \Closure ? $value() : $value; } /** * Set the item at a given offset. * * @param mixed $key * @param mixed $value * @return void */ public function offsetSet($key, $value): void { if ($this->accessible($this->value)) { $this->value[$key] = $value; } } /** * Unset the item at a given offset. * * @param string $key * @return void */ public function offsetUnset($key): void { if ($this->accessible($this->value)) { unset($this->value[$key]); } } }
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