Twee to Gemini Converter

<?php
// converts twee markup to gemini files
// note: does not consider markup, formatting, etc. most gemini clients will not parse
// markdown and instead leave it verbatim. this works best with games that use no logic
// and don't rely on styling, macros, or additional scripting to work.

if ($argc < 2) {
  echo "Error: No twee file provided in arguments";
  die(1);
}

if ($argv[1] == "--help") {
  echo "SYNTAX: php gemitwee.php twee_file_name.twee [output_directory]\n";
  die(1);
}

$gamefile = explode("\n", file_get_contents($argv[1]));
if (!$gamefile) {
  echo 'Error: File not read. Check permissions and file format';
  die(1);
}
$buffer = "";
$sections = array();
$currentheader = "";
$endbuffer = "";
$results = array();
$footnotecounter = 1;
$start;
foreach ($gamefile as $i => $line) {
  $results[$i] = array();
  preg_match('/:: (.+)\s?[\[{<]/', $line, $results[$i]['header']);
  if (count($results[$i]['header']) > 0) {
    // this is a section header
    print_r('Header: '.$currentheader."\n");
    if ($currentheader != "" && (!preg_match('/\[stylesheet\]/', $line, $results[$i]['stylesheet']) || !preg_match('/\[script\]/', $line, $results[$i]['script']))) {
      // skip and dump buffer if this is a stylesheet or script block
      // then write the content
      $sections[$currentheader] = $buffer;
      if ($endbuffer != "") {
        $sections[$currentheader] .= "\n".$endbuffer;
      }
    }
    // reset variables
    $footnotecounter = 1;
    $endbuffer = "";
    $buffer = "";
    $currentheader = trim($results[$i]['header'][1]);
    if (preg_match('/\[Start\]/', $currentheader, $isstart) == 1) {
      // if this is the start block, remember that
      $start = trim($currentheader);
    }
    $sections[$currentheader] = "";
  } else {
    // add line to buffer
    preg_match('/^\[\[(.+)->(.+)\]\]$/', $line, $results[$i]['standalone']);
    if (count($results[$i]['standalone']) > 0) {
    // this is a link on its own line
      $line = "=> !!".$results[$i]['standalone'][2]."!! ".$results[$i]['standalone'][1]."\n";
    }
    preg_match('/^\[\[(.+)\]\]$/', $line, $results[$i]['standalone_noarrow']);
    if (count($results[$i]['standalone_noarrow']) > 0) {
      // this is a link on its own line
      $line = "=> !!".$results[$i]['standalone_noarrow'][1]."!! ".$results[$i]['standalone_noarrow'][1]."\n";
    }
    $c = preg_match_all('/\[\[([\w\d\s,\.:!\"?+-]+)->([\w\d\s,\.:!\"?+-]+)\]\]/', $line, $results[$i]['inline_arrow']);
    if ($c > 0) {
      // this is a link in the middle of a line. we'll add a footnote
      for ($j = 0; $j < count($results[$i]['inline_arrow'][0]); $j++) {
        $linktext = $results[$i]['inline_arrow'][1][$j];
        $line = str_replace($results[$i]['inline_arrow'][0][$j], "$linktext"."[$footnotecounter]", $line);
        $endbuffer .= "=> !!".$results[$i]['inline_arrow'][2][$j]."!! [$footnotecounter] ".$results[$i]['inline_arrow'][1][$j]."\n";
        $footnotecounter++;
      }
    }
    $c = preg_match_all('/\[\[([\w\d\s,\.:!\"?+-]+)\]\]/', $line, $results[$i]['inline_noarrow']);
    if ($c > 0) {
      // this is a link in the middle of a line. we'll add a footnote
      for ($k = 0; $k < count($results[$i]['inline_noarrow'][0]); $k++) {
        $linktext = $results[$i]['inline_noarrow'][1][$k];
        $line = str_replace($results[$i]['inline_noarrow'][0][$k], "$linktext"."[$footnotecounter]", $line);
        $endbuffer .= "=> !!".$results[$i]['inline_noarrow'][1][$k]."!! [$footnotecounter] ".$results[$i]['inline_noarrow'][1][$k]."\n";
        $footnotecounter++;
      }
    }

    $buffer .= $line."\n";
  }
}


$sections[$currentheader] = $buffer;
if ($endbuffer != "") {
  $sections[$currentheader] .= "\n".$endbuffer;
}

$uuids = array();
foreach (array_keys($sections) as $key) {
  if ($key == $start) {
    $uuids[$key] = "index";
  } else {
    $uuids[$key] = uniqid("", true);
  }
}

foreach($sections as $key=>$section) {
  $c = preg_match_all('/!!([\w\s\d\.,:;"-+=]+)!!/', $section, $output_array);
  if ($c > 0) {
    for ($l = 0; $l < count($output_array[0]); $l++) {
      $search = $output_array[0][$l];
      $section = str_replace($search, $uuids[$output_array[1][$l]].".gmi", $section);
    }
  }
  file_put_contents(dirname(__FILE__)."/".$argv[2]."/".$uuids[$key].".gmi", $section);
}
echo "\nTwee > Gemini conversion complete.";