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<?php
/** @license MIT
* Copyright 2017 J. King, Dustin Wilson et al.
* See LICENSE and AUTHORS files for details */
declare(strict_types=1);
namespace JKingWeb\Arsse\Context;
abstract class AbstractContext {
protected $props = [];
protected $parent = null;
public function __construct(self $c = null) {
$this->parent = $c;
}
public function __clone() {
// if the context was cloned because its parent was cloned, change the parent to the clone
if ($this->parent) {
$t = debug_backtrace(\DEBUG_BACKTRACE_IGNORE_ARGS | \DEBUG_BACKTRACE_PROVIDE_OBJECT, 2)[1];
if (($t['object'] ?? null) instanceof self && $t['function'] === "__clone") {
$this->parent = $t['object'];
}
}
}
/** @codeCoverageIgnore */
public function __destruct() {
unset($this->parent);
}
protected function act(string $prop, int $set, $value) {
if ($set) {
if (is_null($value)) {
unset($this->props[$prop]);
$this->$prop = (new \ReflectionClass($this))->getDefaultProperties()[$prop];
} else {
$this->props[$prop] = true;
$this->$prop = $value;
}
return $this->parent ?? $this;
} else {
return isset($this->props[$prop]);
}
}
}