92 lines
2.7 KiB
PHP
92 lines
2.7 KiB
PHP
<?php
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namespace SilverStripe\Core\Manifest;
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/**
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* Class ClassContentRemover
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* @package SilverStripe\Core\Manifest
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*
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* A utility class to clean the contents of a PHP file containing classes/interfaces/traits/enums.
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*
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* It removes any code with in `$cut_off_depth` number of curly braces.
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*/
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class ClassContentRemover
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{
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/**
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* @param string $filePath
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* @param int $cutOffDepth The number of levels of curly braces to go before ignoring the content
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*
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* @return string
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*/
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public static function remove_class_content($filePath, $cutOffDepth = 1)
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{
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// Use PHP's built in method to strip comments and whitespace
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$contents = php_strip_whitespace($filePath ?? '');
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if (!trim($contents ?? '')) {
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return $contents;
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}
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if (!preg_match('/\b(?:class|interface|trait|enum)/i', $contents ?? '')) {
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return '';
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}
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// tokenize the file contents
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$tokens = token_get_all($contents ?? '');
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$cleanContents = '';
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$depth = 0;
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$startCounting = false;
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// iterate over all the tokens and only store the tokens that are outside $cutOffDepth
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foreach ($tokens as $token) {
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// only store the string literal of the token, that's all we need
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if (!is_array($token)) {
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$token = [
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T_STRING,
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$token,
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null
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];
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}
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// only count if we see a class/interface/trait keyword
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$targetTokens = [T_CLASS, T_INTERFACE, T_TRAIT];
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if (version_compare(phpversion(), '8.1.0', '>')) {
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$targetTokens[] = T_ENUM;
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}
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if (!$startCounting && in_array($token[0], $targetTokens)) {
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$startCounting = true;
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}
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// use curly braces as a sign of depth
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if ($token[1] === '{') {
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if ($depth < $cutOffDepth) {
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$cleanContents .= $token[1];
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}
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if ($startCounting) {
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++$depth;
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}
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} elseif ($token[1] === '}') {
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if ($startCounting) {
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--$depth;
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// stop counting if we've just come out of the
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// class/interface/trait declaration
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if ($depth <= 0) {
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$startCounting = false;
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}
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}
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if ($depth < $cutOffDepth) {
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$cleanContents .= $token[1];
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}
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} elseif ($depth < $cutOffDepth) {
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$cleanContents .= $token[1];
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}
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}
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// return cleaned class
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return trim($cleanContents ?? '');
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}
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}
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