function comment_reply

This function is responsible for generating a comment reply form. There are several cases that have to be handled, including:

• replies to comments
• replies to nodes
• attempts to reply to nodes that can no longer accept comments
• respecting access permissions ('access comments', 'post comments', etc.)

The node or comment that is being replied to must appear above the comment form to provide the user context while authoring the comment.

Parameters

$node: Every comment belongs to a node. This is that node.

$pid: Some comments are replies to other comments. In those cases, $pid is the parent comment's cid.

Return value

The rendered parent node or comment plus the new comment form.

File

modules/comment/comment.pages.inc, line 50

User page callbacks for the comment module.

Code

function comment_reply($node, $pid = NULL) {

  // Set the breadcrumb trail.
  drupal_set_breadcrumb(array(
    l(t('Home'), NULL),
    l($node->title, 'node/' . $node->nid),
  ));
  $op = isset($_POST['op']) ? $_POST['op'] : '';
  $output = '';
  if (user_access('access comments')) {

    // The user is previewing a comment prior to submitting it.
    if ($op == t('Preview')) {
      if (user_access('post comments')) {
        $output .= comment_form_box(array(
          'pid' => $pid,
          'nid' => $node->nid,
        ), NULL);
      }
      else {
        drupal_set_message(t('You are not authorized to post comments.'), 'error');
        drupal_goto("node/{$node->nid}");
      }
    }
    else {

      // $pid indicates that this is a reply to a comment.
      if ($pid) {

        // load the comment whose cid = $pid
        if ($comment = db_fetch_object(db_query('SELECT c.*, u.uid, u.name AS registered_name, u.signature, u.signature_format, u.picture, u.data FROM {comments} c INNER JOIN {users} u ON c.uid = u.uid WHERE c.cid = %d AND c.status = %d', $pid, COMMENT_PUBLISHED))) {

          // If that comment exists, make sure that the current comment and the parent comment both
          // belong to the same parent node.
          if ($comment->nid != $node->nid) {

            // Attempting to reply to a comment not belonging to the current nid.
            drupal_set_message(t('The comment you are replying to does not exist.'), 'error');
            drupal_goto("node/{$node->nid}");
          }

          // Display the parent comment
          $comment = drupal_unpack($comment);
          $comment->name = $comment->uid ? $comment->registered_name : $comment->name;
          $output .= theme('comment_view', $comment, $node);
        }
        else {
          drupal_set_message(t('The comment you are replying to does not exist.'), 'error');
          drupal_goto("node/{$node->nid}");
        }
      }
      else {
        if (user_access('access content')) {
          $output .= node_view($node);
        }
      }

      // Should we show the reply box?
      if (node_comment_mode($node->nid) != COMMENT_NODE_READ_WRITE) {
        drupal_set_message(t("This discussion is closed: you can't post new comments."), 'error');
        drupal_goto("node/{$node->nid}");
      }
      else {
        if (user_access('post comments')) {
          $output .= comment_form_box(array(
            'pid' => $pid,
            'nid' => $node->nid,
          ), t('Reply'));
        }
        else {
          drupal_set_message(t('You are not authorized to post comments.'), 'error');
          drupal_goto("node/{$node->nid}");
        }
      }
    }
  }
  else {
    drupal_set_message(t('You are not authorized to view comments.'), 'error');
    drupal_goto("node/{$node->nid}");
  }
  return $output;
}