Form constructor for the comment reply form.
There are several cases that have to be handled, including:
The node or comment that is being replied to must appear above the comment form to provide the user context while authoring the comment.
Drupal\node\Node $node: Every comment belongs to a node. This is that node.
$pid: (optional) Some comments are replies to other comments. In those cases, $pid is the parent comment's comment ID. Defaults to NULL.
array An associative array containing:
function comment_reply(Node $node, $pid = NULL) {
// Set the breadcrumb trail.
drupal_set_breadcrumb(array(
l(t('Home'), NULL),
l($node
->label(), 'node/' . $node->nid),
));
$op = isset($_POST['op']) ? $_POST['op'] : '';
$build = array();
// The user is previewing a comment prior to submitting it.
if ($op == t('Preview')) {
if (user_access('post comments')) {
$build['comment_form'] = comment_add($node, $pid);
}
else {
drupal_set_message(t('You are not authorized to post comments.'), 'error');
drupal_goto("node/{$node->nid}");
}
}
else {
// $pid indicates that this is a reply to a comment.
if ($pid) {
if (user_access('access comments')) {
// Load the parent comment.
$comment = comment_load($pid);
if ($comment->status == COMMENT_PUBLISHED) {
// If that comment exists, make sure that the current comment and the
// parent comment both belong to the same parent node.
if ($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->node_type = 'comment_node_' . $node->type;
field_attach_load('comment', array(
$comment->cid => $comment,
));
$comment->name = $comment->uid ? $comment->registered_name : $comment->name;
$build['comment_parent'] = comment_view($comment);
}
else {
drupal_set_message(t('The comment you are replying to does not exist.'), 'error');
drupal_goto("node/{$node->nid}");
}
}
else {
drupal_set_message(t('You are not authorized to view comments.'), 'error');
drupal_goto("node/{$node->nid}");
}
}
elseif (user_access('access content')) {
$build['comment_node'] = node_view($node);
}
// Should we show the reply box?
if ($node->comment != COMMENT_NODE_OPEN) {
drupal_set_message(t("This discussion is closed: you can't post new comments."), 'error');
drupal_goto("node/{$node->nid}");
}
elseif (user_access('post comments')) {
$build['comment_form'] = comment_add($node, $pid);
}
else {
drupal_set_message(t('You are not authorized to post comments.'), 'error');
drupal_goto("node/{$node->nid}");
}
}
return $build;
}