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InterceptorGenerator.php
01 <?php
02
03 declare(strict_types=1);
04
05 namespace ProxyManager\ProxyGenerator\AccessInterceptorScopeLocalizer\MethodGenerator\Util;
06
07 use ProxyManager\Generator\MethodGenerator;
08 use ProxyManager\Generator\Util\ProxiedMethodReturnExpression;
09 use Zend\Code\Generator\PropertyGenerator;
10
11 /**
12 * Utility to create pre- and post- method interceptors around a given method body
13 *
14 * @author Marco Pivetta <ocramius@gmail.com>
15 * @license MIT
16 *
17 * @private - this class is just here as a small utility for this component, don't use it in your own code
18 */
19 class InterceptorGenerator
20 {
21 /**
22 * @param string $methodBody the body of the previously generated code.
23 * It MUST assign the return value to a variable
24 * `$returnValue` instead of directly returning
25 * @param \ProxyManager\Generator\MethodGenerator $method
26 * @param \Zend\Code\Generator\PropertyGenerator $prefixInterceptors
27 * @param \Zend\Code\Generator\PropertyGenerator $suffixInterceptors
28 * @param \ReflectionMethod|null $originalMethod
29 */
30 public static function createInterceptedMethodBody(
31 string $methodBody,
32 MethodGenerator $method,
33 PropertyGenerator $prefixInterceptors,
34 PropertyGenerator $suffixInterceptors,
35 ?\ReflectionMethod $originalMethod
36 ) : string {
37 $name = var_export($method->getName(), true);
38 $prefixInterceptorsName = $prefixInterceptors->getName();
39 $suffixInterceptorsName = $suffixInterceptors->getName();
40 $params = [];
41
42 foreach ($method->getParameters() as $parameter) {
43 $parameterName = $parameter->getName();
44 $params[] = var_export($parameterName, true) . ' => $' . $parameter->getName();
45 }
46
47 $paramsString = 'array(' . implode(', ', $params) . ')';
48
49 return "if (isset(\$this->$prefixInterceptorsName" . "[$name])) {\n"
50 . " \$returnEarly = false;\n"
51 . " \$prefixReturnValue = \$this->$prefixInterceptorsName" . "[$name]->__invoke("
52 . "\$this, \$this, $name, $paramsString, \$returnEarly);\n\n"
53 . " if (\$returnEarly) {\n"
54 . ' ' . ProxiedMethodReturnExpression::generate('$prefixReturnValue', $originalMethod) . "\n"
55 . " }\n"
56 . "}\n\n"
57 . $methodBody . "\n\n"
58 . "if (isset(\$this->$suffixInterceptorsName" . "[$name])) {\n"
59 . " \$returnEarly = false;\n"
60 . " \$suffixReturnValue = \$this->$suffixInterceptorsName" . "[$name]->__invoke("
61 . "\$this, \$this, $name, $paramsString, \$returnValue, \$returnEarly);\n\n"
62 . " if (\$returnEarly) {\n"
63 . ' ' . ProxiedMethodReturnExpression::generate('$suffixReturnValue', $originalMethod) . "\n"
64 . " }\n"
65 . "}\n\n"
66 . ProxiedMethodReturnExpression::generate('$returnValue', $originalMethod);
67 }
68 }
69