<?php
/**
 * Ensures all language constructs contain a single space between themselves and their content.
 *
 * @author    Greg Sherwood <gsherwood@squiz.net>
 * @copyright 2006-2015 Squiz Pty Ltd (ABN 77 084 670 600)
 * @license   https://github.com/squizlabs/PHP_CodeSniffer/blob/master/licence.txt BSD Licence
 */

namespace PHP_CodeSniffer\Standards\Squiz\Sniffs\WhiteSpace;

use PHP_CodeSniffer\Sniffs\Sniff;
use PHP_CodeSniffer\Files\File;
use PHP_CodeSniffer\Util;

class LanguageConstructSpacingSniff implements Sniff
{


    /**
     * Returns an array of tokens this test wants to listen for.
     *
     * @return array
     */
    public function register()
    {
        return [
            T_ECHO,
            T_PRINT,
            T_RETURN,
            T_INCLUDE,
            T_INCLUDE_ONCE,
            T_REQUIRE,
            T_REQUIRE_ONCE,
            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();

        if (isset($tokens[($stackPtr + 1)]) === false) {
            // Skip if there is no next token.
            return;
        }

        if ($tokens[($stackPtr + 1)]['code'] === T_SEMICOLON) {
            // No content for this language construct.
            return;
        }

        if ($tokens[($stackPtr + 1)]['code'] === T_WHITESPACE) {
            $content = $tokens[($stackPtr + 1)]['content'];
            if ($content !== ' ') {
                $error = 'Language constructs must be followed by a single space; expected 1 space but found "%s"';
                $data  = [Util\Common::prepareForOutput($content)];
                $fix   = $phpcsFile->addFixableError($error, $stackPtr, 'IncorrectSingle', $data);
                if ($fix === true) {
                    $phpcsFile->fixer->replaceToken(($stackPtr + 1), ' ');
                }
            }
        } else if ($tokens[($stackPtr + 1)]['code'] !== T_OPEN_PARENTHESIS) {
            $error = 'Language constructs must be followed by a single space; expected "%s" but found "%s"';
            $data  = [
                $tokens[$stackPtr]['content'].' '.$tokens[($stackPtr + 1)]['content'],
                $tokens[$stackPtr]['content'].$tokens[($stackPtr + 1)]['content'],
            ];
            $fix   = $phpcsFile->addFixableError($error, $stackPtr, 'Incorrect', $data);
            if ($fix === true) {
                $phpcsFile->fixer->addContent($stackPtr, ' ');
            }
        }//end if

    }//end process()


}//end class
