<?php
/**
 * Squiz_Sniffs_CSS_DuplicateStyleDefinitionSniff.
 *
 * PHP version 5
 *
 * @category  PHP
 * @package   PHP_CodeSniffer
 * @author    Greg Sherwood <gsherwood@squiz.net>
 * @copyright 2006-2014 Squiz Pty Ltd (ABN 77 084 670 600)
 * @license   https://github.com/squizlabs/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
 * @link      http://pear.php.net/package/PHP_CodeSniffer
 */

/**
 * Squiz_Sniffs_CSS_DuplicateStyleDefinitionSniff.
 *
 * Check for duplicate style definitions in the same class.
 *
 * @category  PHP
 * @package   PHP_CodeSniffer
 * @author    Greg Sherwood <gsherwood@squiz.net>
 * @copyright 2006-2014 Squiz Pty Ltd (ABN 77 084 670 600)
 * @license   https://github.com/squizlabs/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
 * @version   Release: @package_version@
 * @link      http://pear.php.net/package/PHP_CodeSniffer
 */
class Squiz_Sniffs_CSS_DuplicateStyleDefinitionSniff implements PHP_CodeSniffer_Sniff
{

    /**
     * A list of tokenizers this sniff supports.
     *
     * @var array
     */
    public $supportedTokenizers = array('CSS');


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

    }//end register()


    /**
     * Processes the tokens that this sniff is interested in.
     *
     * @param PHP_CodeSniffer_File $phpcsFile The file where the token was found.
     * @param int                  $stackPtr  The position in the stack where
     *                                        the token was found.
     *
     * @return void
     */
    public function process(PHP_CodeSniffer_File $phpcsFile, $stackPtr)
    {
        $tokens = $phpcsFile->getTokens();

        // Find the content of each style definition name.
        $styleNames = array();

        $next = $stackPtr;
        $end  = $tokens[$stackPtr]['bracket_closer'];

        do {
            $next = $phpcsFile->findNext(array(T_STYLE, T_OPEN_CURLY_BRACKET), ($next + 1), $end);
            if ($next === false) {
                // Class definition is empty.
                break;
            }

            if ($tokens[$next]['code'] === T_OPEN_CURLY_BRACKET) {
                $next = $tokens[$next]['bracket_closer'];
                continue;
            }

            $name = $tokens[$next]['content'];
            if (isset($styleNames[$name]) === true) {
                $first = $styleNames[$name];
                $error = 'Duplicate style definition found; first defined on line %s';
                $data  = array($tokens[$first]['line']);
                $phpcsFile->addError($error, $next, 'Found', $data);
            } else {
                $styleNames[$name] = $next;
            }
        } while ($next !== false);

    }//end process()


}//end class
