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<?php
/**
* This file is part of the Nette Framework (https://nette.org)
* Copyright (c) 2004 David Grudl (https://davidgrudl.com)
*/
declare(strict_types=1);
namespace Nette;
use Nette\Utils\ObjectHelpers;
/**
* Strict class for better experience.
* - 'did you mean' hints
* - access to undeclared members throws exceptions
* - support for @property annotations
* - support for calling event handlers stored in $onEvent via onEvent()
*/
trait SmartObject
{
/**
* @return mixed
* @throws MemberAccessException
*/
public function __call(string $name, array $args)
{
$class = static::class;
if (ObjectHelpers::hasProperty($class, $name) === 'event') { // calling event handlers
$handlers = $this->$name ?? null;
if (is_iterable($handlers)) {
foreach ($handlers as $handler) {
$handler(...$args);
}
} elseif ($handlers !== null) {
throw new UnexpectedValueException("Property $class::$$name must be iterable or null, " . get_debug_type($handlers) . ' given.');
}
return null;
}
ObjectHelpers::strictCall($class, $name);
}
/**
* @throws MemberAccessException
*/
public static function __callStatic(string $name, array $args)
{
ObjectHelpers::strictStaticCall(static::class, $name);
}
/**
* @return mixed
* @throws MemberAccessException if the property is not defined.
*/
public function &__get(string $name)
{
$class = static::class;
if ($prop = ObjectHelpers::getMagicProperties($class)[$name] ?? null) { // property getter
if (!($prop & 0b0001)) {
throw new MemberAccessException("Cannot read a write-only property $class::\$$name.");
}
$m = ($prop & 0b0010 ? 'get' : 'is') . ucfirst($name);
if ($prop & 0b10000) {
$trace = debug_backtrace(0, 1)[0]; // suppose this method is called from __call()
$loc = isset($trace['file'], $trace['line'])
? " in $trace[file] on line $trace[line]"
: '';
trigger_error("Property $class::\$$name is deprecated, use $class::$m() method$loc.", E_USER_DEPRECATED);
}
if ($prop & 0b0100) { // return by reference
return $this->$m();
} else {
$val = $this->$m();
return $val;
}
} else {
ObjectHelpers::strictGet($class, $name);
}
}
/**
* @throws MemberAccessException if the property is not defined or is read-only
*/
public function __set(string $name, mixed $value): void
{
$class = static::class;
if (ObjectHelpers::hasProperty($class, $name)) { // unsetted property
$this->$name = $value;
} elseif ($prop = ObjectHelpers::getMagicProperties($class)[$name] ?? null) { // property setter
if (!($prop & 0b1000)) {
throw new MemberAccessException("Cannot write to a read-only property $class::\$$name.");
}
$m = 'set' . ucfirst($name);
if ($prop & 0b10000) {
$trace = debug_backtrace(0, 1)[0]; // suppose this method is called from __call()
$loc = isset($trace['file'], $trace['line'])
? " in $trace[file] on line $trace[line]"
: '';
trigger_error("Property $class::\$$name is deprecated, use $class::$m() method$loc.", E_USER_DEPRECATED);
}
$this->$m($value);
} else {
ObjectHelpers::strictSet($class, $name);
}
}
/**
* @throws MemberAccessException
*/
public function __unset(string $name): void
{
$class = static::class;
if (!ObjectHelpers::hasProperty($class, $name)) {
throw new MemberAccessException("Cannot unset the property $class::\$$name.");
}
}
public function __isset(string $name): bool
{
return isset(ObjectHelpers::getMagicProperties(static::class)[$name]);
}
}
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