/**

* Previews the comment.

*/

function modern_comments_preview_submit($form, &$form_state) {

// Return the actual form if it contains errors.

if (form_get_errors()) {

return $form;

}

$comment = comment_form_submit_build_comment($form, $form_state);

$comment_pre_render = comment_preview($comment);

$comment_output = drupal_render($comment_pre_render['comment_preview']);

$node = $form['#node'];

// This is a reply.

if (isset($form_state['values']['pid'])) {

$form_el = "#comment-id-{$comment->pid} form.comment-form";

$new_form_state = array();

$new_form_state['build_info']['args'][] = (object) array('nid' => $node->nid);

$new_form_state['input'] = $form_state['input'];

$form['#action'] = '/modern_comments/reply/' . $comment->nid . '/' . $comment->pid;

$new_form_build = drupal_build_form($form['#form_id'], $new_form_state);

// Don't build comment and body.

unset($new_form_build['comment_preview']);

unset($new_form_build['comment_output_below']);

$new_form_output = drupal_render($new_form_build);

$commands[] = ajax_command_prepend($form_el, $comment_output);

}

// Or is this a brand new comment.

else {

$new_form_state = array();

$new_form_state['build_info']['args'][] = (object) array('nid' => $node->nid);

$new_form_state['input'] = $form_state['input'];

$new_form_build = drupal_build_form($form['#form_id'], $new_form_state);

// Don't build comment and body.

unset($new_form_build['comment_preview']);

unset($new_form_build['comment_output_below']);

$new_form_output = drupal_render($new_form_build);

$form_el = "#comments > form.comment-form";

$commands[] = ajax_command_prepend('#comments > .content', $comment_output);

}

$commands[] = ajax_command_replace($form_el, $new_form_output);

return array('#type' => 'ajax', '#commands' => $commands);

}