[TYPO3-dev] Conditions in Templates

[Elmar Hinz]

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Here is the code, for the curious. It is still alpha.


/**
 * Use or remove subparts with ISSET_var patterns
 * Example of usage see below.
 */


  function substituteMarkers($subpart, $markers){

    foreach(split(chr(10), $subpart) as $line){
      // works only on it's own line
      $pattern = '/###ISSET_+([^#]*)_*###/';
      // set for odd ISSET_xyz, else reset
      if(preg_match($pattern, $line, $matches)) {
        if(!$flags[$matches[1]]) { // Setzen
          $flags[$matches[1]] = true;

          // set nowrite flag if required until the next ISSET_xyz
          // (only if not already set by envelop)
          if(     (!$this->markersCountAsSet($markers, $matches[1])  )
             &&   (! $nowrite )  ) $nowrite = $matches[1];

        }else{ // close it
          $flags[$matches[1]] = false;
          if($nowrite == $matches[1]) $nowrite = 0;
        }
      } else { // It is no ISSET_line. Write if permission is given.
        if($nowrite == false) $out .= $line;
      }
    }
    $out = $this->cObj->substituteMarkerArrayCached($out, $markers);
    return $out;
  }

  /**
   * If markers count as set depends on && or || of marker condition
   */

  function markersCountAsSet($markers, $conditionValue) {
    // Find first || or &&
    $pattern = '/_*([A-Za-z0-9]+)_*(\|\||&&)_*([^_]+)_*/';
    // recurse if there are more
    if( preg_match($pattern, $conditionValue, $matches) ){
      $isset = isset($markers['###' . $matches[1] . '###']);
      if($matches[2] == '||' && $isset)
         $return = true;
       elseif($matches[2] == '||' && !$isset)
         $return = $this-> markersCountAsSet($markers, $matches[3]);
       elseif($matches[2] == '&&' && $isset)
         $return = $this-> markersCountAsSet($markers, $matches[3]);

       elseif($matches[2] == '&&' && !$isset)
         $return = false;
       else
         debug("Invalid format of ISSET Marker. Hint: " . $matches[2] );

    } else {
      // remove underscores
      $pattern = '/_*/';
      $str = preg_replace($pattern, $str, '');
      // end of recursion
      $return = isset($markers['###' . $conditionValue . '###']);

    }
    return $return;
  }

Example template:


<!----  ###ISSET_projectBegin_||_projectEnd### -->
<p> Laufzeit:

<!--  ###ISSET_projectBegin### -->
 von ###projectBegin###
<!--  ###ISSET_projectBegin### -->

<!--  ###ISSET_projectEnd### -->
 bis ###projectEnd###
<!--  ###ISSET_projectEnd### -->

</p>
<!----  ###ISSET_projectBegin_||_projectEnd### -->





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