class PostStatementCommentSniff

class PostStatementCommentSniff implements Sniff {
    
    /**
     * A list of tokenizers this sniff supports.
     *
     * @var array
     */
    public $supportedTokenizers = [
        'PHP',
        'JS',
    ];
    
    /**
     * Exceptions to the rule.
     *
     * If post statement comments are found within the condition
     * parenthesis of these structures, leave them alone.
     *
     * @var array
     */
    private $controlStructureExceptions = [
        T_IF => true,
        T_ELSEIF => true,
        T_SWITCH => true,
        T_WHILE => true,
        T_FOR => true,
        T_FOREACH => true,
        T_MATCH => true,
    ];
    
    /**
     * Returns an array of tokens this test wants to listen for.
     *
     * @return array<int|string>
     */
    public function register() {
        return [
            T_COMMENT,
        ];
    }
    
    //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) {
        $tokens = $phpcsFile->getTokens();
        if (substr($tokens[$stackPtr]['content'], 0, 2) !== '//') {
            return;
        }
        $commentLine = $tokens[$stackPtr]['line'];
        $lastContent = $phpcsFile->findPrevious(T_WHITESPACE, $stackPtr - 1, null, true);
        if ($lastContent === false || $tokens[$lastContent]['line'] !== $commentLine || $tokens[$stackPtr]['column'] === 1) {
            return;
        }
        if ($tokens[$lastContent]['code'] === T_CLOSE_CURLY_BRACKET) {
            return;
        }
        // Special case for JS files and PHP closures.
        if ($tokens[$lastContent]['code'] === T_COMMA || $tokens[$lastContent]['code'] === T_SEMICOLON) {
            $lastContent = $phpcsFile->findPrevious(T_WHITESPACE, $lastContent - 1, null, true);
            if ($lastContent === false || $tokens[$lastContent]['code'] === T_CLOSE_CURLY_BRACKET) {
                return;
            }
        }
        // Special case for (trailing) comments within multi-line control structures.
        if (isset($tokens[$stackPtr]['nested_parenthesis']) === true) {
            $nestedParens = $tokens[$stackPtr]['nested_parenthesis'];
            foreach ($nestedParens as $open => $close) {
                if (isset($tokens[$open]['parenthesis_owner']) === true && isset($this->controlStructureExceptions[$tokens[$tokens[$open]['parenthesis_owner']]['code']]) === true) {
                    return;
                }
            }
        }
        if ($phpcsFile->tokenizerType === 'PHP' && preg_match('|^//[ \\t]*@[^\\s]+|', $tokens[$stackPtr]['content']) === 1) {
            $error = 'Annotations may not appear after statements';
            $phpcsFile->addError($error, $stackPtr, 'AnnotationFound');
            return;
        }
        $error = 'Comments may not appear after statements';
        $fix = $phpcsFile->addFixableError($error, $stackPtr, 'Found');
        if ($fix === true) {
            $phpcsFile->fixer
                ->addNewlineBefore($stackPtr);
        }
    }
    
    //end process()

}