class ClassDefinitionOpeningBraceSpaceSniff

class ClassDefinitionOpeningBraceSpaceSniff implements Sniff {
    
    /**
     * A list of tokenizers this sniff supports.
     *
     * @var array
     */
    public $supportedTokenizers = [
        'CSS',
    ];
    
    /**
     * Returns the token types that this sniff is interested in.
     *
     * @return array<int|string>
     */
    public function register() {
        return [
            T_OPEN_CURLY_BRACKET,
        ];
    }
    
    //end register()
    
    /**
     * Processes the tokens that this sniff is interested in.
     *
     * @param \PHP_CodeSniffer\Files\File $phpcsFile The file where the token was found.
     * @param int                         $stackPtr  The position in the stack where
     *                                               the token was found.
     *
     * @return void
     */
    public function process(File $phpcsFile, $stackPtr) {
        $tokens = $phpcsFile->getTokens();
        $prevNonWhitespace = $phpcsFile->findPrevious(T_WHITESPACE, $stackPtr - 1, null, true);
        if ($prevNonWhitespace !== false) {
            $length = 0;
            if ($tokens[$stackPtr]['line'] !== $tokens[$prevNonWhitespace]['line']) {
                $length = 'newline';
            }
            else {
                if ($tokens[$stackPtr - 1]['code'] === T_WHITESPACE) {
                    if (strpos($tokens[$stackPtr - 1]['content'], "\t") !== false) {
                        $length = 'tab';
                    }
                    else {
                        $length = $tokens[$stackPtr - 1]['length'];
                    }
                }
            }
            if ($length === 0) {
                $error = 'Expected 1 space before opening brace of class definition; 0 found';
                $fix = $phpcsFile->addFixableError($error, $stackPtr, 'NoneBefore');
                if ($fix === true) {
                    $phpcsFile->fixer
                        ->addContentBefore($stackPtr, ' ');
                }
            }
            else {
                if ($length !== 1) {
                    $error = 'Expected 1 space before opening brace of class definition; %s found';
                    $data = [
                        $length,
                    ];
                    $fix = $phpcsFile->addFixableError($error, $stackPtr, 'Before', $data);
                    if ($fix === true) {
                        $phpcsFile->fixer
                            ->beginChangeset();
                        for ($i = $stackPtr - 1; $i > $prevNonWhitespace; $i--) {
                            $phpcsFile->fixer
                                ->replaceToken($i, '');
                        }
                        $phpcsFile->fixer
                            ->addContentBefore($stackPtr, ' ');
                        $phpcsFile->fixer
                            ->endChangeset();
                    }
                }
            }
            
            //end if
        }
        
        //end if
        $nextNonEmpty = $phpcsFile->findNext(Tokens::$emptyTokens, $stackPtr + 1, null, true);
        if ($nextNonEmpty === false) {
            return;
        }
        if ($tokens[$nextNonEmpty]['line'] === $tokens[$stackPtr]['line']) {
            $error = 'Opening brace should be the last content on the line';
            $fix = $phpcsFile->addFixableError($error, $stackPtr, 'ContentBefore');
            if ($fix === true) {
                $phpcsFile->fixer
                    ->beginChangeset();
                $phpcsFile->fixer
                    ->addNewline($stackPtr);
                // Remove potentially left over trailing whitespace.
                if ($tokens[$stackPtr + 1]['code'] === T_WHITESPACE) {
                    $phpcsFile->fixer
                        ->replaceToken($stackPtr + 1, '');
                }
                $phpcsFile->fixer
                    ->endChangeset();
            }
        }
        else {
            if (isset($tokens[$stackPtr]['bracket_closer']) === false) {
                // Syntax error or live coding, bow out.
                return;
            }
            // Check for nested class definitions.
            $found = $phpcsFile->findNext(T_OPEN_CURLY_BRACKET, $stackPtr + 1, $tokens[$stackPtr]['bracket_closer']);
            if ($found === false) {
                // Not nested.
                return;
            }
            $lastOnLine = $stackPtr;
            for ($lastOnLine; $lastOnLine < $tokens[$stackPtr]['bracket_closer']; $lastOnLine++) {
                if ($tokens[$lastOnLine]['line'] !== $tokens[$lastOnLine + 1]['line']) {
                    break;
                }
            }
            $nextNonWhiteSpace = $phpcsFile->findNext(T_WHITESPACE, $lastOnLine + 1, null, true);
            if ($nextNonWhiteSpace === false) {
                return;
            }
            $foundLines = $tokens[$nextNonWhiteSpace]['line'] - $tokens[$stackPtr]['line'] - 1;
            if ($foundLines !== 1) {
                $error = 'Expected 1 blank line after opening brace of nesting class definition; %s found';
                $data = [
                    max(0, $foundLines),
                ];
                $fix = $phpcsFile->addFixableError($error, $stackPtr, 'AfterNesting', $data);
                if ($fix === true) {
                    $firstOnNextLine = $nextNonWhiteSpace;
                    while ($tokens[$firstOnNextLine]['column'] !== 1) {
                        --$firstOnNextLine;
                    }
                    if ($found < 0) {
                        // First statement on same line as the opening brace.
                        $phpcsFile->fixer
                            ->addContentBefore($nextNonWhiteSpace, $phpcsFile->eolChar . $phpcsFile->eolChar);
                    }
                    else {
                        if ($found === 0) {
                            // Next statement on next line, no blank line.
                            $phpcsFile->fixer
                                ->addNewlineBefore($firstOnNextLine);
                        }
                        else {
                            // Too many blank lines.
                            $phpcsFile->fixer
                                ->beginChangeset();
                            for ($i = $firstOnNextLine - 1; $i > $stackPtr; $i--) {
                                if ($tokens[$i]['code'] !== T_WHITESPACE) {
                                    break;
                                }
                                $phpcsFile->fixer
                                    ->replaceToken($i, '');
                            }
                            $phpcsFile->fixer
                                ->addContentBefore($firstOnNextLine, $phpcsFile->eolChar . $phpcsFile->eolChar);
                            $phpcsFile->fixer
                                ->endChangeset();
                        }
                    }
                }
                
                //end if
            }
            
            //end if
        }
        
        //end if
    }
    
    //end process()

}