blog/tags.php

   1 <?php  // $Id$
   2 require_once('../config.php');
   3
   4 /// main switch for form processing to perform, add/delete etc
   5 $action = optional_param('action','',PARAM_ALPHA);
   6
   7 require_login();
   8
   9 /// blogs could be disabled altogether
  10 if (empty($CFG->bloglevel)) {
  11     error('Blogging is disabled!');
  12 }
  13
  14 if (isguest()) {
  15     error(get_string('noguestpost', 'blog'));
  16 }
  17
  18 /// blogs are site level
  19 $sitecontext = get_context_instance(CONTEXT_SYSTEM, SITEID);
  20
  21 $error = '';
  22
  23 $script = '';
  24 switch ($action) {
  25     /// Adding an official tag from submitted value
  26     case 'addofficial':
  27         // Double check to make sure user has capability
  28         if (!has_capability('moodle/blog:manageofficialtags', $sitecontext)) {
  29             error('Can not add official tags tags');
  30         }
  31         if (data_submitted() and confirm_sesskey()) {
  32
  33             $otag = trim(required_param('otag', PARAM_NOTAGS));
  34             // When adding ofical tag, we see if there's already a personal tag
  35             // With the same Name, if there is, we just change the type
  36             if ($tag = get_record('tags', 'text', $otag)) {
  37                 if ($tag->type == 'official') {
  38                     // official tag already exist
  39                     $error = get_string('tagalready');
  40                     break;
  41                 } else {
  42                     $tag->type = 'official';
  43                     update_record('tags', $tag);
  44                     $tagid = $tag->id;
  45                 }
  46
  47             } else { // Brand new offical tag
  48
  49                 $tag = new object();
  50                 $tag->userid = $USER->id;
  51                 $tag->text   = $otag;
  52                 $tag->type   = 'official';
  53
  54                 if (!$tagid = insert_record('tags', $tag)) {
  55                     error('Can not create tag!');
  56                 }
  57             }
  58
  59             /// Write newly added tags back into window opener.
  60             $script = '<script type="text/javascript">
  61 //<![CDATA[
  62             var o = opener.document.createElement("option");
  63             o.innerHTML = "<option>'.$tag->text.'</option>";
  64             o.value = '.$tagid.';
  65             opener.document.entry[\'otags[]\'].insertBefore(o, null);
  66 //]]>
  67             </script>';
  68         }
  69
  70     break;
  71
  72     /// Deletes a tag.
  73     case 'delete':
  74
  75         if (data_submitted() and confirm_sesskey()) {
  76             $tagids = optional_param('tags', array(), PARAM_INT);
  77
  78             if (empty($tagids) or !is_array($tagids)) {
  79                 // TODO add error message here
  80                 // $error = 'no data selected';
  81                 break;
  82             }
  83
  84             foreach ($tagids as $tagid) {
  85
  86                 if (!$tag = get_record('tags', 'id', $tagid)) {
  87                     continue; // page refreshed?
  88                 }
  89
  90                 if ($tag->type == 'official' and !has_capability('moodle/blog:manageofficialtags', $sitecontext)) {
  91                     //can not delete
  92                     continue;
  93                 }
  94
  95                 if ($tag->type == 'personal' and !has_capability('moodle/blog:managepersonaltags', $sitecontext)) {
  96                     //can not delete
  97                     continue;
  98                 }
  99
 100                 // Delete the tag itself
 101                 if (!delete_records('tags', 'id', $tagid)) {
 102                     error('Can not delete tag');
 103                 }
 104
 105                 // Deleteing all references to this tag
 106                 if (!delete_records('blog_tag_instance', 'tagid', $tagid)) {
 107                     error('Can not delete blog tag instances');
 108                 }
 109
 110                 /// Remove parent window option via javascript.
 111                 $script = '<script>
 112 //<![CDATA[
 113                 var i=0;
 114                 while (i < window.opener.document.entry[\'otags[]\'].length) {
 115                     if (window.opener.document.entry[\'otags[]\'].options[i].value == '.$tagid.') {
 116                         window.opener.document.entry[\'otags[]\'].removeChild(opener.document.entry[\'otags[]\'].options[i]);
 117                     }
 118                     i++;
 119                 }
 120
 121                 var i=0;
 122                 while (i < window.opener.document.entry[\'ptags[]\'].length) {
 123                     if (window.opener.document.entry[\'ptags[]\'].options[i].value == '.$tagid.') {
 124                         window.opener.document.entry[\'ptags[]\'].removeChild(opener.document.entry[\'ptags[]\'].options[i]);
 125                     }
 126                     i++;
 127                 }
 128 //]]>
 129                 </script>';
 130             }
 131
 132         }
 133     break;
 134
 135     default:
 136         /// Just display the tags form.
 137     break;
 138 }
 139
 140
 141 /// Print the table.
 142 print_header (get_string('tagmanagement'), '', '', '', $script);
 143 include_once('tags.html');
 144 print_footer();
 145
 146
 147 ?>