class ClassInstantiationSniff

class ClassInstantiationSniff implements Sniff {
    
    /**
     * Returns an array of tokens this test wants to listen for.
     *
     * @return array<int|string>
     */
    public function register() {
        return [
            T_NEW,
        ];
    }
    
    //end register()
    
    /**
     * Processes this test, 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) {
        $tokens = $phpcsFile->getTokens();
        // Find the class name.
        $allowed = [
            T_STRING => T_STRING,
            T_NS_SEPARATOR => T_NS_SEPARATOR,
            T_SELF => T_SELF,
            T_STATIC => T_STATIC,
            T_PARENT => T_PARENT,
            T_VARIABLE => T_VARIABLE,
            T_DOLLAR => T_DOLLAR,
            T_OBJECT_OPERATOR => T_OBJECT_OPERATOR,
            T_NULLSAFE_OBJECT_OPERATOR => T_NULLSAFE_OBJECT_OPERATOR,
            T_DOUBLE_COLON => T_DOUBLE_COLON,
        ];
        $allowed += Tokens::$emptyTokens;
        $classNameEnd = null;
        for ($i = $stackPtr + 1; $i < $phpcsFile->numTokens; $i++) {
            if (isset($allowed[$tokens[$i]['code']]) === true) {
                continue;
            }
            // Bow out when this is an anonymous class.
            // Anonymous classes are the only situation which would allow for an attribute
            // or for the readonly keyword between "new" and the class "name".
            if ($tokens[$i]['code'] === T_ATTRIBUTE || $tokens[$i]['code'] === T_READONLY || $tokens[$i]['code'] === T_ANON_CLASS) {
                return;
            }
            if ($tokens[$i]['code'] === T_OPEN_SQUARE_BRACKET || $tokens[$i]['code'] === T_OPEN_CURLY_BRACKET) {
                $i = $tokens[$i]['bracket_closer'];
                continue;
            }
            $classNameEnd = $i;
            break;
        }
        
        //end for
        if ($classNameEnd === null) {
            return;
        }
        if ($tokens[$classNameEnd]['code'] === T_OPEN_PARENTHESIS) {
            // Using parenthesis.
            return;
        }
        if ($classNameEnd === $stackPtr) {
            // Failed to find the class name.
            return;
        }
        $error = 'Parentheses must be used when instantiating a new class';
        $fix = $phpcsFile->addFixableError($error, $stackPtr, 'MissingParentheses');
        if ($fix === true) {
            $prev = $phpcsFile->findPrevious(Tokens::$emptyTokens, $classNameEnd - 1, null, true);
            $phpcsFile->fixer
                ->addContent($prev, '()');
        }
    }
    
    //end process()

}