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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\Utils;
use Nette;
use Nette\MemberAccessException;
/**
* Nette\SmartObject helpers.
*/
final class ObjectHelpers
{
use Nette\StaticClass;
/**
* @return never
* @throws MemberAccessException
*/
public static function strictGet(string $class, string $name): void
{
$rc = new \ReflectionClass($class);
$hint = self::getSuggestion(array_merge(
array_filter($rc->getProperties(\ReflectionProperty::IS_PUBLIC), function ($p) { return !$p->isStatic(); }),
self::parseFullDoc($rc, '~^[ \t*]*@property(?:-read)?[ \t]+(?:\S+[ \t]+)??\$(\w+)~m')
), $name);
throw new MemberAccessException("Cannot read an undeclared property $class::\$$name" . ($hint ? ", did you mean \$$hint?" : '.'));
}
/**
* @return never
* @throws MemberAccessException
*/
public static function strictSet(string $class, string $name): void
{
$rc = new \ReflectionClass($class);
$hint = self::getSuggestion(array_merge(
array_filter($rc->getProperties(\ReflectionProperty::IS_PUBLIC), function ($p) { return !$p->isStatic(); }),
self::parseFullDoc($rc, '~^[ \t*]*@property(?:-write)?[ \t]+(?:\S+[ \t]+)??\$(\w+)~m')
), $name);
throw new MemberAccessException("Cannot write to an undeclared property $class::\$$name" . ($hint ? ", did you mean \$$hint?" : '.'));
}
/**
* @return never
* @throws MemberAccessException
*/
public static function strictCall(string $class, string $method, array $additionalMethods = []): void
{
$trace = debug_backtrace(0, 3); // suppose this method is called from __call()
$context = ($trace[1]['function'] ?? null) === '__call'
? ($trace[2]['class'] ?? null)
: null;
if ($context && is_a($class, $context, true) && method_exists($context, $method)) { // called parent::$method()
$class = get_parent_class($context);
}
if (method_exists($class, $method)) { // insufficient visibility
$rm = new \ReflectionMethod($class, $method);
$visibility = $rm->isPrivate()
? 'private '
: ($rm->isProtected() ? 'protected ' : '');
throw new MemberAccessException("Call to {$visibility}method $class::$method() from " . ($context ? "scope $context." : 'global scope.'));
} else {
$hint = self::getSuggestion(array_merge(
get_class_methods($class),
self::parseFullDoc(new \ReflectionClass($class), '~^[ \t*]*@method[ \t]+(?:static[ \t]+)?(?:\S+[ \t]+)??(\w+)\(~m'),
$additionalMethods
), $method);
throw new MemberAccessException("Call to undefined method $class::$method()" . ($hint ? ", did you mean $hint()?" : '.'));
}
}
/**
* @return never
* @throws MemberAccessException
*/
public static function strictStaticCall(string $class, string $method): void
{
$trace = debug_backtrace(0, 3); // suppose this method is called from __callStatic()
$context = ($trace[1]['function'] ?? null) === '__callStatic'
? ($trace[2]['class'] ?? null)
: null;
if ($context && is_a($class, $context, true) && method_exists($context, $method)) { // called parent::$method()
$class = get_parent_class($context);
}
if (method_exists($class, $method)) { // insufficient visibility
$rm = new \ReflectionMethod($class, $method);
$visibility = $rm->isPrivate()
? 'private '
: ($rm->isProtected() ? 'protected ' : '');
throw new MemberAccessException("Call to {$visibility}method $class::$method() from " . ($context ? "scope $context." : 'global scope.'));
} else {
$hint = self::getSuggestion(
array_filter((new \ReflectionClass($class))->getMethods(\ReflectionMethod::IS_PUBLIC), function ($m) { return $m->isStatic(); }),
$method
);
throw new MemberAccessException("Call to undefined static method $class::$method()" . ($hint ? ", did you mean $hint()?" : '.'));
}
}
/**
* Returns array of magic properties defined by annotation @property.
* @return array of [name => bit mask]
* @internal
*/
public static function getMagicProperties(string $class): array
{
static $cache;
$props = &$cache[$class];
if ($props !== null) {
return $props;
}
$rc = new \ReflectionClass($class);
preg_match_all(
'~^ [ \t*]* @property(|-read|-write|-deprecated) [ \t]+ [^\s$]+ [ \t]+ \$ (\w+) ()~mx',
(string) $rc->getDocComment(),
$matches,
PREG_SET_ORDER
);
$props = [];
foreach ($matches as [, $type, $name]) {
$uname = ucfirst($name);
$write = $type !== '-read'
&& $rc->hasMethod($nm = 'set' . $uname)
&& ($rm = $rc->getMethod($nm))->name === $nm && !$rm->isPrivate() && !$rm->isStatic();
$read = $type !== '-write'
&& ($rc->hasMethod($nm = 'get' . $uname) || $rc->hasMethod($nm = 'is' . $uname))
&& ($rm = $rc->getMethod($nm))->name === $nm && !$rm->isPrivate() && !$rm->isStatic();
if ($read || $write) {
$props[$name] = $read << 0 | ($nm[0] === 'g') << 1 | $rm->returnsReference() << 2 | $write << 3 | ($type === '-deprecated') << 4;
}
}
foreach ($rc->getTraits() as $trait) {
$props += self::getMagicProperties($trait->name);
}
if ($parent = get_parent_class($class)) {
$props += self::getMagicProperties($parent);
}
return $props;
}
/**
* Finds the best suggestion (for 8-bit encoding).
* @param (\ReflectionFunctionAbstract|\ReflectionParameter|\ReflectionClass|\ReflectionProperty|string)[] $possibilities
* @internal
*/
public static function getSuggestion(array $possibilities, string $value): ?string
{
$norm = preg_replace($re = '#^(get|set|has|is|add)(?=[A-Z])#', '+', $value);
$best = null;
$min = (strlen($value) / 4 + 1) * 10 + .1;
foreach (array_unique($possibilities, SORT_REGULAR) as $item) {
$item = $item instanceof \Reflector ? $item->name : $item;
if ($item !== $value && (
($len = levenshtein($item, $value, 10, 11, 10)) < $min
|| ($len = levenshtein(preg_replace($re, '*', $item), $norm, 10, 11, 10)) < $min
)) {
$min = $len;
$best = $item;
}
}
return $best;
}
private static function parseFullDoc(\ReflectionClass $rc, string $pattern): array
{
do {
$doc[] = $rc->getDocComment();
$traits = $rc->getTraits();
while ($trait = array_pop($traits)) {
$doc[] = $trait->getDocComment();
$traits += $trait->getTraits();
}
} while ($rc = $rc->getParentClass());
return preg_match_all($pattern, implode($doc), $m) ? $m[1] : [];
}
/**
* Checks if the public non-static property exists.
* @return bool|string returns 'event' if the property exists and has event like name
* @internal
*/
public static function hasProperty(string $class, string $name)
{
static $cache;
$prop = &$cache[$class][$name];
if ($prop === null) {
$prop = false;
try {
$rp = new \ReflectionProperty($class, $name);
if ($rp->isPublic() && !$rp->isStatic()) {
$prop = $name >= 'onA' && $name < 'on_' ? 'event' : true;
}
} catch (\ReflectionException $e) {
}
}
return $prop;
}
}