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<?php |
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namespace Nip\AutoLoader\Generators; |
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/** |
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* Class ClassMap |
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* @package Nip\AutoLoader\Generators |
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*/ |
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class ClassMap |
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{ |
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/** |
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* Generate a class map file. |
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* |
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* @param array|string $dirs Directories or a single path to search in |
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* @param string $file The name of the class map file |
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*/ |
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public static function dump($dirs, $file) |
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{ |
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$dirs = (array)$dirs; |
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$maps = []; |
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foreach ($dirs as $dir) { |
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$maps = array_merge($maps, static::createMap($dir)); |
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} |
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return file_put_contents($file, sprintf('<?php return %s;', var_export($maps, true))); |
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} |
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/** |
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* Iterate over all files in the given directory searching for classes. |
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* @param \Iterator|string $dir The directory to search in or an iterator |
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* @return array A class map array |
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*/ |
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public static function createMap($dir) |
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{ |
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ini_set('memory_limit', '300M'); |
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if (is_string($dir)) { |
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$dir = new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($dir)); |
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} |
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$map = []; |
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foreach ($dir as $file) { |
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if (!$file->isFile()) { |
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continue; |
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} |
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$path = $file->getRealPath(); |
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if (pathinfo($path, PATHINFO_EXTENSION) !== 'php') { |
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continue; |
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} |
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$classes = self::findClasses($path); |
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if (PHP_VERSION_ID >= 70000) { |
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// PHP 7 memory manager will not release after token_get_all(), see https://bugs.php.net/70098 |
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gc_mem_caches(); |
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} |
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foreach ($classes as $class) { |
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$map[$class] = $path; |
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} |
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} |
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return $map; |
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} |
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/** |
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* Extract the classes in the given file. |
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* @param string $path The file to check |
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* @return array The found classes |
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*/ |
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private static function findClasses($path) |
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{ |
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$contents = file_get_contents($path); |
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$tokens = token_get_all($contents); |
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$classes = []; |
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$namespace = ''; |
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for ($i = 0; isset($tokens[$i]); ++$i) { |
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$token = $tokens[$i]; |
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if (!isset($token[1])) { |
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continue; |
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} |
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$class = ''; |
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switch ($token[0]) { |
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case T_NAMESPACE: |
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$namespace = ''; |
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// If there is a namespace, extract it |
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while (isset($tokens[++$i][1])) { |
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if (in_array($tokens[$i][0], array(T_STRING, T_NS_SEPARATOR))) { |
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$namespace .= $tokens[$i][1]; |
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} |
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} |
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$namespace .= '\\'; |
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break; |
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case T_CLASS: |
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case T_INTERFACE: |
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case T_TRAIT: |
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// Skip usage of ::class constant |
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$isClassConstant = false; |
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for ($j = $i - 1; $j > 0; --$j) { |
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if (!isset($tokens[$j][1])) { |
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break; |
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} |
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if (T_DOUBLE_COLON === $tokens[$j][0]) { |
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$isClassConstant = true; |
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break; |
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} elseif (!in_array($tokens[$j][0], array(T_WHITESPACE, T_DOC_COMMENT, T_COMMENT))) { |
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break; |
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} |
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} |
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if ($isClassConstant) { |
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break; |
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} |
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// Find the classname |
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while (isset($tokens[++$i][1])) { |
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$t = $tokens[$i]; |
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if (T_STRING === $t[0]) { |
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$class .= $t[1]; |
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} elseif ('' !== $class && T_WHITESPACE === $t[0]) { |
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break; |
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} |
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} |
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$classes[] = ltrim($namespace.$class, '\\'); |
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break; |
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default: |
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break; |
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} |
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} |
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return $classes; |
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} |
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} |
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