--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/comment/comment.pages.inc	Tue Dec 23 14:28:28 2008 +0100
@@ -0,0 +1,116 @@
+<?php
+// $Id: comment.pages.inc,v 1.2.2.1 2008/02/07 18:53:38 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.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;
+}