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<?php
/**
 * Runs jslint.js on the file.
 *
 * @author    Greg Sherwood <[email protected]>
 * @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600)
 * @license   https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
 */

namespace PHP_CodeSniffer\Standards\Squiz\Sniffs\Debug;

use PHP_CodeSniffer\Config;
use PHP_CodeSniffer\Files\File;
use PHP_CodeSniffer\Sniffs\Sniff;
use PHP_CodeSniffer\Util\Common;

class JSLintSniff implements Sniff
{

    /**
     * A list of tokenizers this sniff supports.
     *
     * @var array
     */
    public $supportedTokenizers = ['JS'];


    /**
     * Returns the token types that this sniff is interested in.
     *
     * @return array<int|string>
     */
    public function register()
    {
        return [T_OPEN_TAG];

    }//end register()


    /**
     * Processes the tokens that this sniff is interested in.
     *
     * @param \PHP_CodeSniffer\Files\File $phpcsFile The file where the token was found.
     * @param int                         $stackPtr  The position in the stack where
     *                                               the token was found.
     *
     * @return int
     * @throws \PHP_CodeSniffer\Exceptions\RuntimeException If jslint.js could not be run
     */
    public function process(File $phpcsFile, $stackPtr)
    {
        $rhinoPath  = Config::getExecutablePath('rhino');
        $jslintPath = Config::getExecutablePath('jslint');
        if ($rhinoPath === null || $jslintPath === null) {
            return ($phpcsFile->numTokens + 1);
        }

        $fileName = $phpcsFile->getFilename();

        $rhinoPath  = Common::escapeshellcmd($rhinoPath);
        $jslintPath = Common::escapeshellcmd($jslintPath);

        $cmd = "$rhinoPath \"$jslintPath\" ".escapeshellarg($fileName);
        exec($cmd, $output, $retval);

        if (is_array($output) === true) {
            foreach ($output as $finding) {
                $matches    = [];
                $numMatches = preg_match('/Lint at line ([0-9]+).*:(.*)$/', $finding, $matches);
                if ($numMatches === 0) {
                    continue;
                }

                $line    = (int) $matches[1];
                $message = 'jslint says: '.trim($matches[2]);
                $phpcsFile->addWarningOnLine($message, $line, 'ExternalTool');
            }
        }

        // Ignore the rest of the file.
        return ($phpcsFile->numTokens + 1);

    }//end process()


}//end class