akismet/lib.php

   1 <?php
   2
   3     /*
   4         Elgg Akismet plugin
   5
   6         Ben Werdmuller, Dec 18 2006
   7         ben@curverider.co.uk
   8
   9         Released under the GPL v2
  10     */
  11
  12         global $CFG;
  13
  14     // Configuration - enter your Akismet API key and blog URL (including http://) here
  15     // See http://akismet.com/commercial/ for more details.
  16         $CFG->akismet->apikey = "";
  17         $CFG->akismet->blogurl = "";
  18
  19     // Menu items
  20         function akismet_pagesetup() {
  21             // TODO: add a menu item to flagged comments
  22         }
  23
  24     // Initialise the database etc
  25         function akismet_init() {
  26
  27             global $CFG, $function, $db, $METATABLES;
  28
  29             /*
  30
  31             TODO: add flagged comments database and interface to manage false positives
  32                   and erase real spam
  33
  34             // Check for the akismet database
  35                 if (!in_array($CFG->prefix . "akismet_comments", $METATABLES) || !in_array($CFG->prefix . "akismet_comments", $METATABLES)) {
  36                     if (file_exists($CFG->dirroot . "mod/akismet/$CFG->dbtype.sql")) {
  37                         modify_database($CFG->dirroot . "mod/akismet/$CFG->dbtype.sql");
  38                     } else {
  39                         error("Error: Your database ($CFG->dbtype) is not yet fully supported by the Elgg Akismet plugin.  See the mod/akismet directory.");
  40                     }
  41                     print_continue("index.php");
  42                     exit;
  43                 }
  44             */
  45             // Register the event: we want to know when a comment is created
  46
  47                 listen_for_event("comment","create","akismet_vet");
  48                 listen_for_event("weblog_comment","create","akismet_vet");
  49
  50         }
  51
  52     // Vet comments for spam
  53         function akismet_vet($object_type, $event, $object) {
  54
  55             global $CFG, $messages;
  56
  57             if (($object_type == "comment" || $object_type == "weblog_comment") && !empty($CFG->akismet->apikey) && !empty($CFG->akismet->blogurl)) {
  58
  59                 // Load Akismet class
  60                     @require_once($CFG->dirroot . "mod/akismet/PHP5Akismet.0.2/Akismet.class.php");
  61
  62                 // Get the parent post
  63                     $post = get_record('weblog_posts','ident',$object->post_id);
  64
  65                 // Generate the post URL
  66                     if (!isset($object->comment_type)) {
  67                         $object->comment_type = "weblog";
  68                     }
  69                     switch($object->comment_type) {
  70                         case "weblog":
  71                             $url = $CFG->wwwroot . user_info("username", $post->weblog) . "/". $object->comment_type ."/" . $post->ident . ".html";
  72                             break;
  73                     }
  74
  75                 // Initialise Akismet
  76                     $akismet = new Akismet($CFG->akismet->blogurl,$CFG->akismet->apikey);
  77                     $akismet->setCommentAuthor($object->postedname);
  78                     $akismet->setCommentAuthorEmail("");
  79                     $akismet->setCommentAuthorURL("");
  80                     $akismet->setCommentContent($object->body);
  81                     $akismet->setPermalink($url);
  82
  83                     if ($akismet->isCommentSpam()) {
  84                         $messages[] = __gettext("Your comment could not be posted.");
  85                         return null;
  86                     } else {
  87                         return $object;
  88                     }
  89
  90             } else {
  91                 return $object;
  92             }
  93
  94         }
  95
  96 ?>