ivyforms / backend / vendor / php-di / phpdoc-reader / src / PhpDocReader / PhpParser / UseStatementParser.php

UseStatementParser.php in The Innovative Form Builder – IvyForms 0.3, at backend/vendor/php-di/phpdoc-reader/src/PhpDocReader/PhpParser/UseStatementParser.php

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1	<?php declare(strict_types=1);
2
3	namespace PhpDocReader\PhpParser;
4
5	use SplFileObject;
6
7	/**
8	* Parses a file for "use" declarations.
9	*
10	* Class taken and adapted from doctrine/annotations to avoid pulling the whole package.
11	*
12	* Authors: Fabien Potencier <[email protected]> and Christian Kaps <[email protected]>
13	*/
14	class UseStatementParser
15	{
16	/**
17	* @return array A list with use statements in the form (Alias => FQN).
18	*/
19	public function parseUseStatements(\ReflectionClass $class): array
20	{
21	$filename = $class->getFilename();
22	if ($filename === false) {
23	return [];
24	}
25
26	$content = $this->getFileContent($filename, $class->getStartLine());
27
28	if ($content === null) {
29	return [];
30	}
31
32	$namespace = preg_quote($class->getNamespaceName(), '/');
33	$content = preg_replace('/^.?(\bnamespace\s+' . $namespace . '\s[;{].*)$/s', '\\1', $content);
34	$tokenizer = new TokenParser('<?php ' . $content);
35
36	return $tokenizer->parseUseStatements($class->getNamespaceName());
37	}
38
39	/**
40	* Gets the content of the file right up to the given line number.
41	*
42	* @param string $filename The name of the file to load.
43	* @param int $lineNumber The number of lines to read from file.
44	*/
45	private function getFileContent(string $filename, int $lineNumber): string
46	{
47	if (! is_file($filename)) {
48	throw new \RuntimeException("Unable to read file $filename");
49	}
50
51	$content = '';
52	$lineCnt = 0;
53	$file = new SplFileObject($filename);
54	while (! $file->eof()) {
55	if ($lineCnt++ === $lineNumber) {
56	break;
57	}
58
59	$content .= $file->fgets();
60	}
61
62	return $content;
63	}
64	}
65