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<?php |
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declare(strict_types=1); |
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namespace Ray\Aop; |
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use Ray\Aop\Exception\InvalidSourceClassException; |
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use ReflectionClass; |
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use ReflectionNamedType; |
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use ReflectionUnionType; |
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use function array_keys; |
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use function file_exists; |
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use function file_get_contents; |
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use function implode; |
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use function in_array; |
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use function preg_replace; |
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use function preg_replace_callback; |
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use function sprintf; |
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use function token_get_all; |
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use const T_CLASS; |
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use const T_EXTENDS; |
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use const T_STRING; |
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final class AopCode |
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{ |
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public const INTERCEPT_STATEMENT = '\$this->_intercept(__FUNCTION__, func_get_args());'; |
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/** @var string */ |
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private $code = ''; |
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/** @var int */ |
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private $curlyBraceCount = 0; |
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/** @var MethodSignatureString */ |
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private $methodSignature; |
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public function __construct(MethodSignatureString $methodSignature) |
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{ |
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$this->methodSignature = $methodSignature; |
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} |
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/** @param ReflectionClass<object> $sourceClass */ |
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public function generate(ReflectionClass $sourceClass, BindInterface $bind, string $postfix): string |
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{ |
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$this->parseClass($sourceClass, $postfix); |
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$this->implementsInterface(WeavedInterface::class); |
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$this->addMethods($sourceClass, $bind); |
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return $this->getCodeText(); |
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} |
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/** @return void */ |
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private function add(string $text) |
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{ |
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if ($text === '{') { |
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$this->curlyBraceCount++; |
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} |
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if ($text === '}') { |
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// @codeCoverageIgnoreStart |
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$this->curlyBraceCount--; |
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// @codeCoverageIgnoreEnd |
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} |
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$this->code .= $text; |
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} |
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/** @param non-empty-string $code */ |
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private function insert(string $code): void |
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{ |
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$replacement = $code . '}'; |
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$this->code = (string) preg_replace('/}\s*$/', $replacement, $this->code); |
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} |
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private function addClassName(string $className, string $postfix): void |
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{ |
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$newClassName = $className . $postfix; |
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$this->add($newClassName . ' extends ' . $className . ' '); |
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} |
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/** @param ReflectionClass<object> $sourceClass */ |
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private function parseClass(ReflectionClass $sourceClass, string $postfix): void |
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{ |
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$fileName = (string) $sourceClass->getFileName(); |
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if (! file_exists($fileName)) { |
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throw new InvalidSourceClassException($sourceClass->getName()); |
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} |
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$code = (string) file_get_contents($fileName); |
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/** @var array<int, array{int, string, int}|string> $tokens */ |
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$tokens = token_get_all($code); |
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$iterator = new TokenIterator($tokens); |
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$inClass = false; |
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$className = ''; |
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for ($iterator->rewind(); $iterator->valid(); $iterator->next()) { |
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[$id, $text] = $iterator->getToken(); |
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$isClassKeyword = $id === T_CLASS; |
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if ($isClassKeyword) { |
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$inClass = true; |
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$this->add($text); |
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continue; |
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} |
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$isClassName = $inClass && $id === T_STRING && empty($className); |
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if ($isClassName) { |
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$className = $text; |
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$this->addClassName($className, $postfix); |
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continue; |
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} |
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$isExtendsKeyword = $id === T_EXTENDS; |
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if ($isExtendsKeyword) { |
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$iterator->skipExtends(); |
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continue; |
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} |
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$isClassSignatureEnds = $inClass && $text === '{'; |
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if ($isClassSignatureEnds) { |
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$this->addIntercepterTrait(); |
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return; |
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} |
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$this->add($text); |
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} |
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} |
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private function implementsInterface(string $interfaceName): void |
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{ |
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$pattern = '/(class\s+[\w\s]+extends\s+\w+)(?:\s+implements\s+(.+))?/'; |
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$this->code = (string) preg_replace_callback($pattern, static function ($matches) use ($interfaceName) { |
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if (isset($matches[2])) { |
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// 既に implements が存在する場合 |
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// $match[0] class FakePhp8Types_test extends FakePhp8Types implements FakeNullInterface, \Ray\Aop\FakeNullInterface1 |
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// $match[1] class FakePhp8Types_test extends FakePhp8Types |
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// $match[2] FakeNullInterface, \Ray\Aop\FakeNullInterface1 |
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return sprintf('%s implements %s, \%s', $matches[1], $matches[2], $interfaceName); |
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} |
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// implements が存在しない場合 |
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return sprintf('%s implements \%s', $matches[0], $interfaceName); |
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}, $this->code); |
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} |
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/** @param ReflectionClass<object> $class */ |
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private function addMethods(ReflectionClass $class, BindInterface $bind): void |
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{ |
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$bindings = array_keys($bind->getBindings()); |
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$parentMethods = $class->getMethods(); |
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$interceptedMethods = []; |
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foreach ($parentMethods as $method) { |
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if (! in_array($method->getName(), $bindings)) { |
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continue; |
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} |
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$signature = $this->methodSignature->get($method); |
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$isVoid = false; |
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if ($method->hasReturnType() && (! $method->getReturnType() instanceof ReflectionUnionType)) { |
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$nt = $method->getReturnType(); |
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$isVoid = $nt instanceof ReflectionNamedType && $nt->getName() === 'void'; |
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} |
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$return = $isVoid ? '' : 'return '; |
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$interceptedMethods[] = sprintf(" %s\n {\n %s%s\n }\n", $signature, $return, self::INTERCEPT_STATEMENT); |
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} |
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if (! $interceptedMethods) { |
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return; |
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} |
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$this->insert(implode("\n", $interceptedMethods)); |
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} |
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private function addIntercepterTrait(): void |
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{ |
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$this->add(sprintf("{\n use \%s;\n}\n", InterceptTrait::class)); |
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} |
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private function getCodeText(): string |
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{ |
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// close opened curly brace |
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while ($this->curlyBraceCount !== 0) { |
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$this->code .= '}'; |
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$this->curlyBraceCount--; |
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} |
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return $this->code; |
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} |
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} |
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koriym /
Ray.Aop
Loading history...
Let?s assume that you have a directory layout like this:
. |-- OtherDir | |-- Bar.php | `-- Foo.php `-- SomeDir `-- Foo.phpand let?s assume the following content of
Bar.php:If both files
OtherDir/Foo.phpandSomeDir/Foo.phpare loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.phpHowever, as
OtherDir/Foo.phpdoes not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: