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   1  <?php // $Id: filters.php,v 1.38.4.2 2007/12/25 10:03:17 skodak Exp $
   2  
   3      require_once ('../config.php');
   4  
   5      $action     = optional_param('action', '', PARAM_ACTION);
   6      $filterpath = optional_param('filterpath', '', PARAM_PATH);
   7  
   8      require_login();
   9      require_capability('moodle/site:config', get_context_instance(CONTEXT_SYSTEM));
  10  
  11      $returnurl = "$CFG->wwwroot/$CFG->admin/settings.php?section=managefilters";
  12  
  13      if (!confirm_sesskey()) {
  14          redirect($returnurl);
  15      }
  16  
  17      // get a list of installed filters
  18      $installedfilters = array();
  19      $filterlocations = array('mod','filter');
  20      foreach ($filterlocations as $filterlocation) {
  21          $plugins = get_list_of_plugins($filterlocation);
  22          foreach ($plugins as $plugin) {
  23              $pluginpath = "$CFG->dirroot/$filterlocation/$plugin/filter.php";
  24              if (is_readable($pluginpath)) {
  25                  $installedfilters["$filterlocation/$plugin"] = "$filterlocation/$plugin";
  26              }
  27          }
  28      }
  29  
  30      // get all the currently selected filters
  31      if (!empty($CFG->textfilters)) {
  32          $activefilters = explode(',', $CFG->textfilters);
  33      } else {
  34          $activefilters = array();
  35      }
  36  
  37      //======================
  38      // Process Actions
  39      //======================
  40  
  41      switch ($action) {
  42  
  43      case 'hide':
  44          $key=array_search($filterpath, $activefilters);
  45          // check filterpath is valid
  46          if ($key===false) {
  47              break;
  48          }
  49          // just delete it
  50          unset($activefilters[$key]);
  51          break;
  52  
  53      case 'show':
  54          // check filterpath is valid
  55          if (!array_key_exists($filterpath, $installedfilters)) {
  56              error("Filter $filterpath is not currently installed", $url);
  57          } elseif (array_search($filterpath,$activefilters)) {
  58              // filterpath is already active - doubleclick??
  59          } else {
  60              // add it to installed filters
  61              $activefilters[] = $filterpath;
  62              $activefilters = array_unique($activefilters);
  63          }
  64          break;
  65  
  66      case 'down':
  67          $key=array_search($filterpath, $activefilters);
  68          // check filterpath is valid
  69          if ($key===false) {
  70              error("Filter $filterpath is not currently active", $url);
  71          } elseif ($key>=(count($activefilters)-1)) {
  72              // cannot be moved any further down - doubleclick??
  73          } else {
  74              // swap with $key+1
  75              $fsave = $activefilters[$key];
  76              $activefilters[$key] = $activefilters[$key+1];
  77              $activefilters[$key+1] = $fsave;
  78          }
  79          break;
  80  
  81      case 'up':
  82          $key=array_search($filterpath, $activefilters);
  83          // check filterpath is valid
  84          if ($key===false) {
  85              error("Filter $filterpath is not currently active", $url);
  86          } elseif ($key<1) {
  87              //cannot be moved any further up - doubleclick??
  88          } else {
  89              // swap with $key-1
  90              $fsave = $activefilters[$key];
  91              $activefilters[$key] = $activefilters[$key-1];
  92              $activefilters[$key-1] = $fsave;
  93          }
  94          break;
  95      }
  96  
  97      // save, reset cache and return
  98      set_config('textfilters', implode(',', $activefilters));
  99      reset_text_filters_cache();
 100      redirect($returnurl);
 101  
 102  ?>