Textconf diff for minecraft files using TheFrozenFire/PHP-NBT-Decoder-Encoder

nbt-gitdiff.php

<?php
/**
 * test - gitdiff.cmd.php
 *
 * written      : 2018-05-01 by Radon8472
 * last modified: 2019-06-22 by Radon8472
 *
 * @requires: https://github.com/TheFrozenFire/PHP-NBT-Decoder-Encoder
 *
 * reads nbt or dat-file from commdline parameter or Standard-input, to use it in git-diff textconv
 *
 * @todo 2019-06-22: add parameter to switch between php and json-format (-php. -json) / or/and encoding for output
 */

  $format   = "json"; // json / php
  $encoding = "utf8"; // utf8 / ascii


  function utf8_encode_strings(&$data)
  {
    if(is_string($data))
    {
      $data = utf8_encode($data);
    }
  }



  if(isset($argv[1]))
  {
    $inputFile = $argv[1];
    echo "Read file '".$inputFile."'\n";
  }
  else
  {
    $inputFile = fopen("compress.zlib://php://stdin",'rb');
    ## INFO 2018-05-01: nbt-class dont accepts "php://"-Wrapper as String, maybe because "is_file" is used to check arguments
  }



  require(dirname(__FILE__)."/nbt.class.php");
  $nbt = new nbt();
  # $nbt->verbose = true;
  #$nbt->loadFile("servers.dat");

  if(is_resource($inputFile)) $nbt->loadFile($inputFile, null);
  else                        $nbt->loadFile($inputFile);

  $nbt->writeFile($tmp = tempnam(sys_get_temp_dir(), "nbt"));


  if($format=="json" || $encoding=="utf8") array_walk_recursive($nbt->root, "utf8_encode_strings");

  if($format!="json")
  {
    print_r($nbt->root);
  }
  else
  {
    $output = json_encode($nbt->root, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
    $output = str_replace("},", "},".PHP_EOL, $output);

    $errorCode = json_last_error();
    if($output !== false && $errorCode == JSON_ERROR_NONE)
    {
      ## doent work correctly, cause UTF-8 signs are changed in the json_encode()
      #if($encoding!="utf8") $output = utf8_decode();
      echo $output;
    }
    else
    {
      $error = json_last_error().PHP_EOL;
      if(function_exists("json_last_error_msg")) echo "JSON-Error: " .json_last_error_msg().PHP_EOL;
      else                                       echo "JSON-Error: #".$errorCode.PHP_EOL;
      exit ($errorCode);
    }
  }


?>