<?php
/**
 * MethodDeclarationSniff.
 *
 * 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
 */
namespace PSR2Stock\Sniffs\Methods;

use \PHP_CodeSniffer\Sniffs\AbstractScopeSniff;
use \PHP_CodeSniffer\Files\File;
use \PHP_CodeSniffer\Util\Tokens;

/**
 * MethodDeclarationSniff.
 *
 * Checks that the method declaration is correct.
 *
 * @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: 2.3.4
 * @link      http://pear.php.net/package/PHP_CodeSniffer
 */
class MethodDeclarationSniff extends AbstractScopeSniff
{


    /**
     * Constructs a Squiz_Sniffs_Scope_MethodScopeSniff.
     */
    public function __construct()
    {
        parent::__construct(array(T_CLASS, T_INTERFACE), array(T_FUNCTION));

    }//end __construct()


    /**
     * Processes the function tokens within the class.
     *
     * @param File $phpcsFile The file where this token was found.
     * @param int  $stackPtr  The position where the token was found.
     * @param int  $currScope The current scope opener token.
     *
     * @return void
     */
    protected function processTokenWithinScope(File $phpcsFile, $stackPtr, $currScope)
    {
        $tokens = $phpcsFile->getTokens();

        $methodName = $phpcsFile->getDeclarationName($stackPtr);
        if ($methodName === null) {
            // Ignore closures.
            return;
        }

        $visibility = 0;
        $static     = 0;
        $abstract   = 0;
        $final      = 0;

        $find   = Tokens::$methodPrefixes;
        $find[] = T_WHITESPACE;
        $prev   = $phpcsFile->findPrevious($find, ($stackPtr - 1), null, true);

        $prefix = $stackPtr;
        while (($prefix = $phpcsFile->findPrevious(Tokens::$methodPrefixes, ($prefix - 1), $prev)) !== false) {
            switch ($tokens[$prefix]['code']) {
            case T_STATIC:
                $static = $prefix;
                break;
            case T_ABSTRACT:
                $abstract = $prefix;
                break;
            case T_FINAL:
                $final = $prefix;
                break;
            default:
                $visibility = $prefix;
                break;
            }
        }

        $fixes = array();

        if ($visibility !== 0 && $final > $visibility) {
            $error = 'The final declaration must precede the visibility declaration';
            $fix   = $phpcsFile->addFixableError($error, $final, 'FinalAfterVisibility');
            if ($fix === true) {
                $fixes[$final]       = '';
                $fixes[($final + 1)] = '';
                if (isset($fixes[$visibility]) === true) {
                    $fixes[$visibility] = 'final '.$fixes[$visibility];
                } else {
                    $fixes[$visibility] = 'final '.$tokens[$visibility]['content'];
                }
            }
        }

        if ($visibility !== 0 && $abstract > $visibility) {
            $error = 'The abstract declaration must precede the visibility declaration';
            $fix   = $phpcsFile->addFixableError($error, $abstract, 'AbstractAfterVisibility');
            if ($fix === true) {
                $fixes[$abstract]       = '';
                $fixes[($abstract + 1)] = '';
                if (isset($fixes[$visibility]) === true) {
                    $fixes[$visibility] = 'abstract '.$fixes[$visibility];
                } else {
                    $fixes[$visibility] = 'abstract '.$tokens[$visibility]['content'];
                }
            }
        }

        if ($static !== 0 && $static < $visibility) {
            $error = 'The static declaration must come after the visibility declaration';
            $fix   = $phpcsFile->addFixableError($error, $static, 'StaticBeforeVisibility');
            if ($fix === true) {
                $fixes[$static]       = '';
                $fixes[($static + 1)] = '';
                if (isset($fixes[$visibility]) === true) {
                    $fixes[$visibility] = $fixes[$visibility].' static';
                } else {
                    $fixes[$visibility] = $tokens[$visibility]['content'].' static';
                }
            }
        }

        // Batch all the fixes together to reduce the possibility of conflicts.
        if (empty($fixes) === false) {
            $phpcsFile->fixer->beginChangeset();
            foreach ($fixes as $stackPtr => $content) {
                $phpcsFile->fixer->replaceToken($stackPtr, $content);
            }

            $phpcsFile->fixer->endChangeset();
        }

    }//end processTokenWithinScope()

    /**
     * AbstractScopeSniff requires implementing this, but we don't need to process
     * tokens outside classes and interfaces.
     *
     * {@inheritdoc}
     */
    protected function processTokenOutsideScope(File $phpcsFile, $stackPtr)
    {
    }

}//end class