class ElseIfSniff

class ElseIfSniff implements Sniff {
    
    /**
     * Returns an array of tokens this test wants to listen for.
     *
     * @return array<int|string>
     */
    public function register() {
        return [
            T_ELSE,
        ];
    }
    
    //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();
        $nextNonWhiteSpace = $phpcsFile->findNext(T_WHITESPACE, $stackPtr + 1, null, true, null, true);
        if ($tokens[$nextNonWhiteSpace]['code'] === T_IF) {
            $fix = $phpcsFile->addFixableError('Use "elseif" in place of "else if"', $nextNonWhiteSpace, 'ElseIfDeclaration');
            if ($fix === true) {
                $phpcsFile->fixer
                    ->beginChangeset();
                $phpcsFile->fixer
                    ->replaceToken($stackPtr, 'elseif');
                for ($i = $stackPtr + 1; $i < $nextNonWhiteSpace; $i++) {
                    if ($tokens[$i]['code'] === T_WHITESPACE) {
                        $phpcsFile->fixer
                            ->replaceToken($i, '');
                    }
                }
                $phpcsFile->fixer
                    ->replaceToken($nextNonWhiteSpace, '');
                $phpcsFile->fixer
                    ->endChangeset();
            }
        }
    }
    
    //end process()

}