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| 1 | <?php |
| 2 | declare(strict_types=1); |
| 3 | /** |
| 4 | * Pop PHP Framework (https://www.popphp.org/) |
| 5 | * |
| 6 | * @link https://github.com/popphp/popphp-framework |
| 7 | * @author Nick Sagona, III <dev@noladev.com> |
| 8 | * @copyright Copyright (c) 2009-2027 NOLA Interactive, LLC. |
| 9 | * @license https://www.popphp.org/license New BSD License |
| 10 | */ |
| 11 | |
| 12 | /** |
| 13 | * @namespace |
| 14 | */ |
| 15 | namespace Pop\Code\Reflection\Support; |
| 16 | |
| 17 | /** |
| 18 | * Source body extractor class |
| 19 | * |
| 20 | * Recovers a method/function/closure's body as source text by slicing its declaring file between |
| 21 | * getStartLine()/getEndLine(). Both ReflectionMethod and ReflectionFunction extend |
| 22 | * ReflectionFunctionAbstract, so one helper serves MethodReflection and FunctionReflection, which |
| 23 | * previously each carried a near-identical, independently written copy of this logic. |
| 24 | * |
| 25 | * @category Pop |
| 26 | * @package Pop\Code |
| 27 | * @author Nick Sagona, III <dev@noladev.com> |
| 28 | * @copyright Copyright (c) 2009-2027 NOLA Interactive, LLC. |
| 29 | * @license https://www.popphp.org/license New BSD License |
| 30 | * @version 6.0.0 |
| 31 | */ |
| 32 | class SourceBodyExtractor |
| 33 | { |
| 34 | |
| 35 | /** |
| 36 | * Cache of file() results, keyed by file path -- avoids re-reading and re-splitting the |
| 37 | * same source file once per method when a class with many methods is reflected. |
| 38 | * @var array<string, array<int, string>> |
| 39 | */ |
| 40 | protected static array $fileCache = []; |
| 41 | |
| 42 | /** |
| 43 | * Extract a method/function's body as source text |
| 44 | * |
| 45 | * @param \ReflectionFunctionAbstract $reflection |
| 46 | * @param bool $stripBraces |
| 47 | * @return string|null |
| 48 | */ |
| 49 | public static function extract(\ReflectionFunctionAbstract $reflection, bool $stripBraces): string|null |
| 50 | { |
| 51 | $file = $reflection->getFileName(); |
| 52 | |
| 53 | if (empty($file) || !file_exists($file)) { |
| 54 | return null; |
| 55 | } |
| 56 | |
| 57 | if (!isset(self::$fileCache[$file])) { |
| 58 | self::$fileCache[$file] = file($file); |
| 59 | } |
| 60 | $lines = self::$fileCache[$file]; |
| 61 | $startLine = $reflection->getStartLine() - 1; |
| 62 | $endLine = $reflection->getEndLine() - 1; |
| 63 | |
| 64 | if (!isset($lines[$startLine]) || !isset($lines[$endLine])) { |
| 65 | return null; |
| 66 | } |
| 67 | |
| 68 | // Locate the line containing the function/method body's opening brace by tracking |
| 69 | // parenthesis depth. It is not necessarily the line immediately after the declaration: |
| 70 | // a parameter list (e.g. constructor property promotion) may span multiple lines. |
| 71 | // |
| 72 | // This is done with PHP's tokenizer rather than a raw character scan so that stray |
| 73 | // '(' / ')' / '{' characters inside a string literal or comment in the parameter list |
| 74 | // (e.g. a default value like `string $close = ')'`) are never mistaken for real parens. |
| 75 | $snippet = '<?php ' . implode('', array_slice($lines, $startLine, $endLine - $startLine + 1)); |
| 76 | $tokens = \PhpToken::tokenize($snippet); |
| 77 | |
| 78 | $parenDepth = 0; |
| 79 | $seenParen = false; |
| 80 | $braceLine = null; |
| 81 | |
| 82 | foreach ($tokens as $token) { |
| 83 | if ($token->text === '(') { |
| 84 | $parenDepth++; |
| 85 | $seenParen = true; |
| 86 | } else if ($token->text === ')') { |
| 87 | $parenDepth--; |
| 88 | } else if (($token->text === '{') && $seenParen && ($parenDepth === 0)) { |
| 89 | $braceLine = $startLine + $token->line - 1; |
| 90 | break; |
| 91 | } |
| 92 | } |
| 93 | |
| 94 | $length = ($braceLine !== null) ? ($endLine - $braceLine) : 0; |
| 95 | |
| 96 | if (($braceLine === null) || ($length <= 0)) { |
| 97 | return null; |
| 98 | } |
| 99 | |
| 100 | if ($stripBraces) { |
| 101 | $lines = array_slice($lines, $braceLine + 1, $length); |
| 102 | |
| 103 | if (preg_match('/[ ]+\}/', $lines[count($lines) - 1])) { |
| 104 | unset($lines[count($lines) - 1]); |
| 105 | } |
| 106 | |
| 107 | $lines = array_values($lines); |
| 108 | } else { |
| 109 | $lines = array_slice($lines, $braceLine + 1, $length - 1); |
| 110 | } |
| 111 | |
| 112 | if (isset($lines[0]) && str_starts_with($lines[0], ' ')) { |
| 113 | $spaces = strlen($lines[0]) - strlen(ltrim($lines[0])); |
| 114 | if ($spaces > 0) { |
| 115 | $lines = array_map(function ($value) use ($spaces) { |
| 116 | if (substr($value, 0, $spaces) === str_repeat(' ', $spaces)) { |
| 117 | $value = substr($value, $spaces); |
| 118 | } |
| 119 | return $value; |
| 120 | }, $lines); |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | $body = implode('', $lines); |
| 125 | |
| 126 | return empty($body) ? null : $body; |
| 127 | } |
| 128 | |
| 129 | } |