drupal/modules/tracker.module

<?php
// $Id$

function tracker_help($section = "admin/help#tracker") {
  $output = "";

  switch ($section) {
    case 'admin/help#tracer':
      $output =  t("<p>The tracker module is a handy module for displaying the most recent posts.  By following the <i>recent posts</i> link in the user block, a user may quickly review all recent postings.</p>");
      break;
    case 'admin/system/modules#description':
      $output = t("Enables tracking of recent posts for users.");
      break;
  }

  return $output;
}

function tracker_link($type) {

  $links = array();

  if ($type == "system") {
    if (user_access("access content")) {
      menu("tracker", t("recent posts"), "tracker_page", 1);
    }
  }

  return $links;
}

function tracker_posts($id = 0) {

  $header = array(
    array("data" => t("type"), "field" => "type"),
    array("data" => t("title"), "field" => "title"),
    array("data" => t("author"), "field" => "u.name"),
    array("data" => t("last post"), "field" => "last_activity", "sort" => "desc")
  );
  if ($id) {

    $sql = "SELECT n.nid, n.title, n.type, n.changed, n.uid, u.name, MAX(GREATEST(n.changed, c.timestamp)) AS last_activity FROM {node} n LEFT JOIN {comments} c ON n.nid = c.nid INNER JOIN {users} u ON n.uid = u.uid WHERE n.uid = '". check_query($id) ."' AND n.status = 1 GROUP BY n.nid, n.title, n.type, n.changed, n.uid, u.name";
    $sql .= tablesort_sql($header);
    $sresult = pager_query($sql, 10, 0, "SELECT COUNT(nid) FROM {node} WHERE status = 1 AND uid = '". check_query($id) ."'");

  }
  else {

    $sql = "SELECT n.nid, n.title, n.type, n.changed, n.uid, u.name, MAX(GREATEST(n.changed, c.timestamp)) AS last_activity FROM {node} n LEFT JOIN {comments} c ON n.nid = c.nid INNER JOIN {users} u ON n.uid = u.uid WHERE n.status = 1 GROUP BY n.nid, n.title, n.type, n.changed, n.uid, u.name";
    $sql .= tablesort_sql($header);
    $sresult = pager_query($sql, 10, 0, "SELECT COUNT(nid) FROM {node} WHERE status = 1");

  }

  while ($node = db_fetch_object($sresult)) {
    if ($id) {
      $cresult = db_query("SELECT c.*, u.name FROM {comments} c INNER JOIN {users} u ON c.uid = u.uid WHERE c.uid = %d AND c.nid = %d AND c.status = 0 ORDER BY c.cid DESC", $id, $node->nid);
    }
    else {
      $cresult = db_query("SELECT c.*, u.name FROM {comments} c INNER JOIN {users} u ON c.uid = u.uid WHERE c.nid = %d AND c.status = 0 ORDER BY c.cid DESC", $node->nid);
    }

    $type = ucfirst(module_invoke($node->type, "node", "name"));
    $title = l($node->title, "node/view/$node->nid") ." ". (node_is_new($node->nid, $node->changed) ? theme("mark") : "");
    $author = format_name($node);

    $comments = array();
    while ($comment = db_fetch_object($cresult)) {
      $comments[] = "<li>". t("%subject by %author", array("%subject" => l($comment->subject, "node/view/$node->nid#$comment->cid"), "%author" => format_name($comment))) ." ". (node_is_new($comment->nid, $comment->timestamp) ? theme("mark") : "") ."</li>\n";
    }

    if ($comments) {
      $comments = "<ul>". implode("\n", $comments) ."</ul>";
    }
    else {
      $comments = "";
    }

    $rows[] = array(array("data" => $type, "class" => "type"), array("data" => $title . $comments, "class" => "content"), array("data" => $author, "class" => "author"), array("data" => format_date($node->last_activity, "small"), "class" => "last_post"));
  }

  if ($pager = theme("pager", NULL, 10, 0, tablesort_pager())) {
   $rows[] = array(array("data" => $pager, "colspan" => 4));
  }

  $output  = "<div id=\"tracker\">";
  $output .= theme("table", $header, $rows);
  $output .= "</div>";

  return $output;
}

function tracker_user($type, &$edit, &$user) {
  switch ($type) {
    case "view_private":
    case "view_public":
      if (user_access("access content")) {
        return form_item(t("Recent posts"), l(t("recent posts"), "tracker/$user->uid"));
      }
  }
}

function tracker_page() {
  global $user;

  if (user_access("access content")) {
    print theme("page", tracker_posts(arg(1)), t("Recent posts"));
  }
  else {
    print theme("page", message_access());
  }
}

?>