class IncludeOwnSystemSniff

class IncludeOwnSystemSniff implements Sniff {
    
    /**
     * Returns an array of tokens this test wants to listen for.
     *
     * @return array<int|string>
     */
    public function register() {
        return [
            T_DOUBLE_COLON,
        ];
    }
    
    //end register()
    
    /**
     * Processes this sniff, when one of its tokens is encountered.
     *
     * @param \PHP_CodeSniffer\Files\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(File $phpcsFile, $stackPtr) {
        $fileName = $phpcsFile->getFilename();
        $matches = [];
        if (preg_match('|/systems/(.*)/([^/]+)?actions.inc$|i', $fileName, $matches) === 0) {
            // Not an actions file.
            return;
        }
        $ownClass = $matches[2];
        $tokens = $phpcsFile->getTokens();
        $typeName = $phpcsFile->findNext(T_CONSTANT_ENCAPSED_STRING, $stackPtr + 2, null, false, true);
        $typeName = trim($tokens[$typeName]['content'], " '");
        switch (strtolower($tokens[$stackPtr + 1]['content'])) {
            case 'includesystem':
                $included = strtolower($typeName);
                break;
            case 'includeasset':
                $included = strtolower($typeName) . 'assettype';
                break;
            case 'includewidget':
                $included = strtolower($typeName) . 'widgettype';
                break;
            default:
                return;
        }
        if ($included === strtolower($ownClass)) {
            $error = "You do not need to include \"%s\" from within the system's own actions file";
            $data = [
                $ownClass,
            ];
            $phpcsFile->addError($error, $stackPtr, 'NotRequired', $data);
        }
    }
    
    //end process()
    
    /**
     * Determines the included class name from given token.
     *
     * @param \PHP_CodeSniffer\Files\File $phpcsFile The file where this token was found.
     * @param array                       $tokens    The array of file tokens.
     * @param int                         $stackPtr  The position in the tokens array of the
     *                                               potentially included class.
     *
     * @return bool
     */
    protected function getIncludedClassFromToken($phpcsFile, array $tokens, $stackPtr) {
        return false;
    }
    
    //end getIncludedClassFromToken()

}