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Viewing file:     UnusedSystemSniff.php (5.51 KB)      -rw-rw-rw-
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<?php
/**
 * Ensures that systems, asset types and libs are included before they are used.
 *
 * PHP version 5
 *
 * @category  PHP
 * @package   PHP_CodeSniffer_MySource
 * @author    Greg Sherwood <gsherwood@squiz.net>
 * @copyright 2006-2011 Squiz Pty Ltd (ABN 77 084 670 600)
 * @license   http://matrix.squiz.net/developer/tools/php_cs/licence BSD Licence
 * @link      http://pear.php.net/package/PHP_CodeSniffer
 */

/**
 * Ensures that systems and asset types are used if they are included.
 *
 * @category  PHP
 * @package   PHP_CodeSniffer_MySource
 * @author    Greg Sherwood <gsherwood@squiz.net>
 * @copyright 2006-2011 Squiz Pty Ltd (ABN 77 084 670 600)
 * @license   http://matrix.squiz.net/developer/tools/php_cs/licence BSD Licence
 * @version   Release: 1.3.3
 * @link      http://pear.php.net/package/PHP_CodeSniffer
 */
class MySource_Sniffs_Channels_UnusedSystemSniff implements PHP_CodeSniffer_Sniff
{


    
/**
     * Returns an array of tokens this test wants to listen for.
     *
     * @return array
     */
    
public function register()
    {
        return array(
T_DOUBLE_COLON);

    }
//end register()


    /**
     * Processes this sniff, when one of its tokens is encountered.
     *
     * @param PHP_CodeSniffer_File $phpcsFile The file being scanned.
     * @param int                  $stackPtr  The position of the current token in
     *                                        the stack passed in $tokens.
     *
     * @return void
     */
    
public function process(PHP_CodeSniffer_File $phpcsFile$stackPtr)
    {
        
$tokens $phpcsFile->getTokens();

        
// Check if this is a call to includeSystem, includeAsset or includeWidget.
        
$methodName strtolower($tokens[($stackPtr 1)]['content']);
        if (
in_array($methodName, array('includesystem''includeasset''includewidget')) === true) {
            
$systemName $phpcsFile->findNext(T_WHITESPACE, ($stackPtr 3), nulltrue);
            if (
$systemName === false || $tokens[$systemName]['code'] !== T_CONSTANT_ENCAPSED_STRING) {
                
// Must be using a variable instead of a specific system name.
                // We can't accurately check that.
                
return;
            }

            
$systemName trim($tokens[$systemName]['content'], " '");
        } else {
            return;
        }

        if (
$methodName === 'includeasset') {
            
$systemName .= 'assettype';
        } else if (
$methodName === 'includewidget') {
            
$systemName .= 'widgettype';
        }

        
$systemName strtolower($systemName);

        
// Now check if this system is used anywhere in this scope.
        
$level $tokens[$stackPtr]['level'];
        for (
$i = ($stackPtr 1); $i $phpcsFile->numTokens$i++) {
            if (
$tokens[$i]['level'] < $level) {
                
// We have gone out of scope.
                // If the original include was inside an IF statement that
                // is checking if the system exists, check the outer scope
                // as well.
                
if ($tokens[$stackPtr]['level'] === $level) {
                    
// We are still in the base level, so this is the first
                    // time we have got here.
                    
$conditions array_keys($tokens[$stackPtr]['conditions']);
                    if (empty(
$conditions) === false) {
                        
$cond array_pop($conditions);
                        if (
$tokens[$cond]['code'] === T_IF) {
                            
$i $tokens[$cond]['scope_closer'];
                            
$level--;
                            continue;
                        }
                    }
                }

                break;
            }
//end if

            
$validTokens = array(
                            
T_DOUBLE_COLON,
                            
T_EXTENDS,
                            
T_IMPLEMENTS,
                           );

            if (
in_array($tokens[$i]['code'], $validTokens) === false) {
                continue;
            }

            switch (
$tokens[$i]['code']) {
            case 
T_DOUBLE_COLON:
                
$usedName strtolower($tokens[($i 1)]['content']);
                if (
$usedName === $systemName) {
                    
// The included system was used, so it is fine.
                    
return;
                }

                break;
            case 
T_EXTENDS:
                
$classNameToken $phpcsFile->findNext(T_STRING, ($i 1));
                
$className      strtolower($tokens[$classNameToken]['content']);
                if (
$className === $systemName) {
                    
// The included system was used, so it is fine.
                    
return;
                }

                break;
            case 
T_IMPLEMENTS:
                
$endImplements $phpcsFile->findNext(array(T_EXTENDST_OPEN_CURLY_BRACKET), ($i 1));
                for (
$x = ($i 1); $x $endImplements$x++) {
                    if (
$tokens[$x]['code'] === T_STRING) {
                        
$className strtolower($tokens[$x]['content']);
                        if (
$className === $systemName) {
                            
// The included system was used, so it is fine.
                            
return;
                        }
                    }
                }

                break;
            }
//end switch
        
}//end for

        // If we get to here, the system was not use.
        
$error 'Included system "%s" is never used';
        
$data  = array($systemName);
        
$phpcsFile->addError($error$stackPtr'Found'$data);

    }
//end process()


}//end class

?>

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