blog/tags.php

   1 <?php
   2 require_once('../config.php');
   3 require_login();
   4
   5 if (isguest()) {
   6     error ('Guests can not modify tags!');
   7 }
   8 //form process
   9 $mode = optional_param('mode','',PARAM_ALPHA);
  10
  11 switch ($mode) {
  12     case 'addofficial':    /// adding official tags
  13
  14         if (!isadmin() || !confirm_sesskey()) {
  15             die('you can not add official tags');
  16         }
  17
  18         if (($otag = optional_param('otag', '', PARAM_NOTAGS)) && (!get_record('tags','text',$otag))) {
  19             $tag->userid = $USER->id;
  20             $tag->text = $otag;
  21             $tag->type = 'official';
  22             $tagid = insert_record('tags', $tag);
  23
  24             /// write newly added tags back into window opener
  25             echo '<script language="JavaScript" type="text/javascript">
  26             var o = opener.document.createElement("option");
  27             o.innerHTML = "<option>'.$tag->text.'</option>";
  28             o.value = '.$tagid.';
  29             opener.document.entry[\'otags[]\'].insertBefore(o, null);
  30             </script>';
  31         } else {  // tag already exist
  32             notify(get_string('tagalready'));
  33         }
  34
  35     break;
  36
  37     case 'addpersonal':    /// everyone can add personal tags
  38         if (!confirm_sesskey() || isguest() || !isset($USER->id)) {
  39             error ('you can not add tags');
  40         }
  41
  42         if (($ptag = optional_param('ptag', '', PARAM_NOTAGS)) && (!get_record('tags','text',$ptag))) {
  43             $tag->userid = $USER->id;
  44             $tag->text = $ptag;
  45             $tag->type = 'personal';
  46             $tagid = insert_record('tags', $tag);
  47
  48             /// write newly added tags back into window opener
  49             echo '<script language="JavaScript" type="text/javascript">
  50             var o = opener.document.createElement("option");
  51             o.innerHTML = "<option>'.$tag->text.'</option>";
  52             o.value = '.$tagid.';
  53             opener.document.entry[\'ptags[]\'].insertBefore(o, null);
  54             </script>';
  55         } else {  //tag already exist
  56             notify(get_string('tagalready'));
  57         }
  58
  59     break;
  60
  61     case 'delete':  /// delete a tag
  62         if (!confirm_sesskey()) {
  63             error('you can not delete tags');
  64         }
  65
  66         if ($tags = optional_param('tags', 0, PARAM_INT)) {
  67
  68             foreach ($tags as $tag) {
  69
  70                 $blogtag = get_record('tags','id',$tag);
  71
  72                 // you can only delete your own tags, or you have to be an admin
  73                 if (!isadmin() and $USER->id != $blogtag->userid) {
  74                     notify(get_string('norighttodeletetag','blog', $blogtag->text));
  75                     continue;
  76                 }
  77
  78                 /// Only admin can delete tags that are referenced
  79                 if (!isadmin() && get_records('blog_tag_instance','tagid', $tag)) {
  80                     notify('tag is used by other users, can not delete!');
  81                     continue;
  82                 }
  83
  84                 delete_records('tags','id',$tag);
  85                 delete_records('blog_tag_instance', 'tagid', $tag);
  86
  87                 /// remove parent window option via javascript
  88                 echo '<script>
  89                 var i=0;
  90                 while (i < window.opener.document.entry[\'otags[]\'].length) {
  91                     if (window.opener.document.entry[\'otags[]\'].options[i].value == '.$tag.') {
  92                         window.opener.document.entry[\'otags[]\'].removeChild(opener.document.entry[\'otags[]\'].options[i]);
  93                     }
  94                     i++;
  95                 }
  96
  97                 var i=0;
  98                 while (i < window.opener.document.entry[\'ptags[]\'].length) {
  99                     if (window.opener.document.entry[\'ptags[]\'].options[i].value == '.$tag.') {
 100                         window.opener.document.entry[\'ptags[]\'].removeChild(opener.document.entry[\'ptags[]\'].options[i]);
 101                     }
 102                     i++;
 103                 }
 104
 105                 </script>';
 106             }
 107         }
 108     break;
 109
 110     default:  // just displaying tags form
 111     break;
 112 }
 113
 114 //print the table
 115
 116 print_header();
 117
 118 include_once('tags.html');
 119
 120 print_footer();
 121
 122
 123 ?>