<?php

// $Id: comment.pages.inc,v 1.2.2.2 2009/07/01 20:51:55 goba Exp $

/**

 * @file

 * User page callbacks for the comment module.

 */

/**

 * Form builder; generate a comment editing form.

 *

 * @param $cid

 *   ID of the comment to be edited.

 * @ingroup forms

 */

function comment_edit($cid) {

  global $user;

  $comment = db_fetch_object(db_query('SELECT c.*, u.uid, u.name AS registered_name, u.data FROM {comments} c INNER JOIN {users} u ON c.uid = u.uid WHERE c.cid = %d', $cid));

  $comment = drupal_unpack($comment);

  $comment->name = $comment->uid ? $comment->registered_name : $comment->name;

  if (comment_access('edit', $comment)) {

    return comment_form_box((array)$comment);

  }

  else {

    drupal_access_denied();

  }

}

/**

 * 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.

 *

 * @param $node

 *   Every comment belongs to a node. This is that node.

 *

 * @param $pid

 *   Some comments are replies to other comments. In those cases, $pid is the parent

 *   comment's cid.

 *

 * @return

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

 */

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");

        }

      }

      // This is the case where the comment is in response to a node. Display the node.

      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;

}