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<?php |
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declare(strict_types=1); |
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namespace Yiisoft\VarDumper; |
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use RuntimeException; |
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use function defined; |
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/** |
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* UseStatementParser given a PHP file, returns a set of `use` statements from the code. |
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*/ |
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final class UseStatementParser |
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{ |
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/** |
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* @param string $file File to read. |
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* |
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* @throws RuntimeException if there is a problem reading file. |
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* |
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* @return array Use statements data. |
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* @psalm-return array<string, string> |
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*/ |
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public function fromFile(string $file): array |
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{ |
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if (!file_exists($file)) { |
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throw new RuntimeException('File "' . $file . '" does not exist.'); |
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} |
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if (!is_readable($file)) { |
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throw new RuntimeException('File "' . $file . '" is not readable.'); |
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} |
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$fileContent = file_get_contents($file); |
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if ($fileContent === false) { |
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throw new RuntimeException('Failed to read file "' . $file . '".'); |
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} |
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$tokens = token_get_all($fileContent); |
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array_shift($tokens); |
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$uses = []; |
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foreach ($tokens as $i => $token) { |
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if (!isset($token[0])) { |
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continue; |
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} |
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if ($token[0] === T_USE) { |
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$uses = array_merge($uses, $this->normalizeUse(array_slice($tokens, $i + 1))); |
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continue; |
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} |
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} |
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return $uses; |
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} |
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/** |
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* Normalizes raw tokens into uniform use statement data. |
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* |
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* @param array $tokens Raw tokens. |
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* |
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* @return array Normalized use statement data. |
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* @psalm-return array<string, string> |
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*/ |
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private function normalizeUse(array $tokens): array |
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{ |
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$commonNamespace = '\\'; |
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$current = ''; |
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$uses = []; |
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/** @psalm-var array<int, int|string>|string $token */ |
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foreach ($tokens as $token) { |
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if (!isset($token[0])) { |
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continue; |
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} |
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if ( |
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$token[0] === T_STRING |
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|| $token[0] === T_NS_SEPARATOR |
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|| (defined('T_NAME_QUALIFIED') && $token[0] === T_NAME_QUALIFIED) |
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|| (defined('T_NAME_FULLY_QUALIFIED') && $token[0] === T_NAME_FULLY_QUALIFIED) |
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|| (defined('T_NAME_RELATIVE') && $token[0] === T_NAME_RELATIVE) |
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) { |
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$current .= $token[1]; |
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continue; |
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} |
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if ($token === ',' || $token === ';') { |
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if ($current !== '') { |
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$uses[] = $commonNamespace . $current; |
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$current = ''; |
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} |
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} |
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if ($token === ';') { |
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break; |
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} |
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if ($token === '{') { |
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$commonNamespace .= $current; |
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$current = ''; |
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continue; |
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} |
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if ($token[0] === T_AS) { |
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$current .= '@'; |
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} |
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} |
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return $this->replaceAliases($uses); |
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} |
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/** |
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* @param array $uses |
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* @psalm-param list<string> $uses |
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* |
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* @return array<string, string> |
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*/ |
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private function replaceAliases(array $uses): array |
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{ |
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$result = []; |
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foreach ($uses as $use) { |
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$delimiterPosition = strpos($use, '@'); |
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if ($delimiterPosition !== false) { |
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$alias = mb_substr($use, $delimiterPosition + 1); |
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$result[$alias] = mb_substr($use, 0, $delimiterPosition); |
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} else { |
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$part = strrchr($use, '\\'); |
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$result[$part === false ? $use : substr($part, 1)] = $use; |
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} |
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} |
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return $result; |
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} |
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} |
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yiisoft /
var-dumper
