class DeclareStatementSniff

class DeclareStatementSniff implements Sniff {
    
    /**
     * Returns an array of tokens this test wants to listen for.
     *
     * @return array<int|string>
     */
    public function register() {
        return [
            T_DECLARE,
        ];
    }
    
    //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) {
        // Allow a byte-order mark.
        $tokens = $phpcsFile->getTokens();
        // There should be no space between declare keyword and opening parenthesis.
        $parenthesis = $stackPtr + 1;
        if ($tokens[$stackPtr + 1]['type'] !== 'T_OPEN_PARENTHESIS') {
            $parenthesis = $phpcsFile->findNext(T_WHITESPACE, $stackPtr + 1, null, true);
            $error = 'Expected no space between declare keyword and opening parenthesis in a declare statement';
            if ($tokens[$parenthesis]['type'] === 'T_OPEN_PARENTHESIS') {
                $fix = $phpcsFile->addFixableError($error, $stackPtr, 'SpaceFoundAfterDeclare');
                if ($fix === true) {
                    $phpcsFile->fixer
                        ->replaceToken($stackPtr + 1, '');
                }
            }
            else {
                $phpcsFile->addError($error, $parenthesis, 'SpaceFoundAfterDeclare');
                $parenthesis = $phpcsFile->findNext(T_OPEN_PARENTHESIS, $parenthesis + 1);
            }
        }
        // There should be no space between open parenthesis and the directive.
        $string = $phpcsFile->findNext(T_WHITESPACE, $parenthesis + 1, null, true);
        if ($parenthesis !== false) {
            if ($tokens[$parenthesis + 1]['type'] !== 'T_STRING') {
                $error = 'Expected no space between opening parenthesis and directive in a declare statement';
                if ($tokens[$string]['type'] === 'T_STRING') {
                    $fix = $phpcsFile->addFixableError($error, $parenthesis, 'SpaceFoundBeforeDirective');
                    if ($fix === true) {
                        $phpcsFile->fixer
                            ->replaceToken($parenthesis + 1, '');
                    }
                }
                else {
                    $phpcsFile->addError($error, $string, 'SpaceFoundBeforeDirective');
                    $string = $phpcsFile->findNext(T_STRING, $string + 1);
                }
            }
        }
        // There should be no space between directive and the equal sign.
        $equals = $phpcsFile->findNext(T_WHITESPACE, $string + 1, null, true);
        if ($string !== false) {
            // The directive must be in lowercase.
            if ($tokens[$string]['content'] !== strtolower($tokens[$string]['content'])) {
                $error = 'The directive of a declare statement must be in lowercase';
                $fix = $phpcsFile->addFixableError($error, $string, 'DirectiveNotLowercase');
                if ($fix === true) {
                    $phpcsFile->fixer
                        ->replaceToken($string, strtolower($tokens[$string]['content']));
                }
            }
            if ($tokens[$string + 1]['type'] !== 'T_EQUAL') {
                $error = 'Expected no space between directive and the equals sign in a declare statement';
                if ($tokens[$equals]['type'] === 'T_EQUAL') {
                    $fix = $phpcsFile->addFixableError($error, $equals, 'SpaceFoundAfterDirective');
                    if ($fix === true) {
                        $phpcsFile->fixer
                            ->replaceToken($string + 1, '');
                    }
                }
                else {
                    $phpcsFile->addError($error, $equals, 'SpaceFoundAfterDirective');
                    $equals = $phpcsFile->findNext(T_EQUAL, $equals + 1);
                }
            }
        }
        
        //end if
        // There should be no space between equal sign and directive value.
        $value = $phpcsFile->findNext(T_WHITESPACE, $equals + 1, null, true);
        if ($value === false) {
            // Live coding / parse error.
            return;
        }
        if ($equals !== false) {
            if ($tokens[$equals + 1]['type'] !== 'T_LNUMBER') {
                $error = 'Expected no space between equal sign and the directive value in a declare statement';
                if ($tokens[$value]['type'] === 'T_LNUMBER') {
                    $fix = $phpcsFile->addFixableError($error, $value, 'SpaceFoundBeforeDirectiveValue');
                    if ($fix === true) {
                        $phpcsFile->fixer
                            ->replaceToken($equals + 1, '');
                    }
                }
                else {
                    $phpcsFile->addError($error, $value, 'SpaceFoundBeforeDirectiveValue');
                    $value = $phpcsFile->findNext(T_LNUMBER, $value + 1);
                }
            }
        }
        $parenthesis = $phpcsFile->findNext(T_WHITESPACE, $value + 1, null, true);
        if ($value !== false) {
            if ($tokens[$value + 1]['type'] !== 'T_CLOSE_PARENTHESIS') {
                $error = 'Expected no space between the directive value and closing parenthesis in a declare statement';
                if ($tokens[$parenthesis]['type'] === 'T_CLOSE_PARENTHESIS') {
                    $fix = $phpcsFile->addFixableError($error, $parenthesis, 'SpaceFoundAfterDirectiveValue');
                    if ($fix === true) {
                        $phpcsFile->fixer
                            ->replaceToken($value + 1, '');
                    }
                }
                else {
                    $phpcsFile->addError($error, $parenthesis, 'SpaceFoundAfterDirectiveValue');
                    $parenthesis = $phpcsFile->findNext(T_CLOSE_PARENTHESIS, $parenthesis + 1);
                }
            }
        }
        // Check for semicolon.
        $curlyBracket = false;
        if ($tokens[$parenthesis + 1]['type'] !== 'T_SEMICOLON') {
            $token = $phpcsFile->findNext(T_WHITESPACE, $parenthesis + 1, null, true);
            if ($tokens[$token]['type'] === 'T_OPEN_CURLY_BRACKET') {
                // Block declaration.
                $curlyBracket = $token;
            }
            else {
                if ($tokens[$token]['type'] === 'T_SEMICOLON') {
                    $error = 'Expected no space between the closing parenthesis and the semicolon in a declare statement';
                    $fix = $phpcsFile->addFixableError($error, $parenthesis, 'SpaceFoundBeforeSemicolon');
                    if ($fix === true) {
                        $phpcsFile->fixer
                            ->replaceToken($parenthesis + 1, '');
                    }
                }
                else {
                    if ($tokens[$token]['type'] === 'T_CLOSE_TAG') {
                        if ($tokens[$parenthesis]['line'] !== $tokens[$token]['line']) {
                            // Close tag must be on the same line..
                            $error = 'The close tag must be on the same line as the declare statement';
                            $fix = $phpcsFile->addFixableError($error, $parenthesis, 'CloseTagOnNewLine');
                            if ($fix === true) {
                                $phpcsFile->fixer
                                    ->replaceToken($parenthesis + 1, ' ');
                            }
                        }
                    }
                    else {
                        $error = 'Expected no space between the closing parenthesis and the semicolon in a declare statement';
                        $phpcsFile->addError($error, $parenthesis, 'SpaceFoundBeforeSemicolon');
                        // See if there is a semicolon or curly bracket after this token.
                        $token = $phpcsFile->findNext([
                            T_WHITESPACE,
                            T_COMMENT,
                        ], $token + 1, null, true);
                        if ($tokens[$token]['type'] === 'T_OPEN_CURLY_BRACKET') {
                            $curlyBracket = $token;
                        }
                    }
                }
            }
            
            //end if
        }
        
        //end if
        if ($curlyBracket !== false) {
            $prevToken = $phpcsFile->findPrevious(T_WHITESPACE, $curlyBracket - 1, null, true);
            $error = 'Expected one space between closing parenthesis and opening curly bracket in a declare statement';
            // The opening curly bracket must on the same line with a single space between closing bracket.
            if ($tokens[$prevToken]['type'] !== 'T_CLOSE_PARENTHESIS') {
                $phpcsFile->addError($error, $curlyBracket, 'ExtraSpaceFoundAfterBracket');
            }
            else {
                if ($phpcsFile->getTokensAsString($prevToken + 1, $curlyBracket - $prevToken - 1) !== ' ') {
                    $fix = $phpcsFile->addFixableError($error, $curlyBracket, 'ExtraSpaceFoundAfterBracket');
                    if ($fix === true) {
                        $phpcsFile->fixer
                            ->beginChangeset();
                        $phpcsFile->fixer
                            ->replaceToken($prevToken + 1, ' ');
                        $nextToken = $prevToken + 2;
                        while ($nextToken !== $curlyBracket) {
                            $phpcsFile->fixer
                                ->replaceToken($nextToken, '');
                            $nextToken++;
                        }
                        $phpcsFile->fixer
                            ->endChangeset();
                    }
                }
            }
            
            //end if
            $closeCurlyBracket = $tokens[$curlyBracket]['bracket_closer'];
            $prevToken = $phpcsFile->findPrevious(T_WHITESPACE, $closeCurlyBracket - 1, null, true);
            $nextToken = $phpcsFile->findNext([
                T_WHITESPACE,
                T_COMMENT,
            ], $closeCurlyBracket + 1, null, true);
            $line = $tokens[$closeCurlyBracket]['line'];
            // The closing curly bracket must be on a new line.
            if ($tokens[$prevToken]['line'] === $line || $tokens[$nextToken]['line'] === $line) {
                if ($tokens[$prevToken]['line'] === $line) {
                    $error = 'The closing curly bracket of a declare statement must be on a new line';
                    $fix = $phpcsFile->addFixableError($error, $prevToken, 'CurlyBracketNotOnNewLine');
                    if ($fix === true) {
                        $phpcsFile->fixer
                            ->addNewline($prevToken);
                    }
                }
            }
            
            //end if
            // Closing curly bracket must align with the declare keyword.
            if ($tokens[$stackPtr]['column'] !== $tokens[$closeCurlyBracket]['column']) {
                $error = 'The closing curly bracket of a declare statements must be aligned with the declare keyword';
                $fix = $phpcsFile->addFixableError($error, $closeCurlyBracket, 'CloseBracketNotAligned');
                if ($fix === true) {
                    $phpcsFile->fixer
                        ->replaceToken($closeCurlyBracket - 1, str_repeat(' ', $tokens[$stackPtr]['column'] - 1));
                }
            }
            // The open curly bracket must be the last code on the line.
            $token = $phpcsFile->findNext(Tokens::$emptyTokens, $curlyBracket + 1, null, true);
            if ($tokens[$curlyBracket]['line'] === $tokens[$token]['line']) {
                $error = 'The open curly bracket of a declare statement must be the last code on the line';
                $fix = $phpcsFile->addFixableError($error, $token, 'CodeFoundAfterCurlyBracket');
                if ($fix === true) {
                    $phpcsFile->fixer
                        ->beginChangeset();
                    $prevToken = $phpcsFile->findPrevious(T_WHITESPACE, $token - 1, null, true);
                    for ($i = $prevToken + 1; $i < $token; $i++) {
                        $phpcsFile->fixer
                            ->replaceToken($i, '');
                    }
                    $phpcsFile->fixer
                        ->addNewLineBefore($token);
                    $phpcsFile->fixer
                        ->endChangeset();
                }
            }
        }
        
        //end if
    }
    
    //end process()

}