function content_lock_form_alter in Content locking (anti-concurrent editing) 6

Same name and namespace in other branches

1. 8.2 content_lock.module \content_lock_form_alter()
2. 8 content_lock.module \content_lock_form_alter()
3. 6.2 content_lock.module \content_lock_form_alter()
4. 7.3 content_lock.module \content_lock_form_alter()
5. 7 content_lock.module \content_lock_form_alter()
6. 7.2 content_lock.module \content_lock_form_alter()

Implementation of hook_form_alter().

File

./content_lock.module, line 155

Allows users to lock documents for modification.

Code

function content_lock_form_alter(&$form, $form_state, $form_id) {
  global $user;
  $node = $form['#node'];
  $nid = $form['nid']['#value'];

  /** ******************* General preconditions for locking ***************** */

  // Veto-API. Let other modules veto the locking - so force skiping out of any conditions they want
  // We will use | logic, so if any module denies locking - we deny
  // Be sure to noticte that content_lock also implements this api for his own vetos!
  $skip_lock = FALSE;

  // no veto yet
  $result = module_invoke_all('content_lock_skip_locking', $node, $form_id, $form, $form_state);
  foreach ($result as $bool) {
    if (is_bool($bool)) {
      $skip_lock = $skip_lock | $bool;
    }
  }
  if ($skip_lock == FALSE) {

    // if we should lock or already have been locked, load the unload js. Dont use
    // form alter but rather after build, so it works even for previews
    if (variable_get('content_lock_unload_js', true)) {
      $form['#after_build'][] = '_content_lock_add_unload_js';
    }

    // Add some minor things to the form
    _content_lock_add_nodeadministration($form, $form_state, $form_id);

    // Adding cancel button, if configured
    if (variable_get('content_lock_admin_cancelbutton', true)) {
      _content_lock_add_cancelbutton($form, $form_state, $form_id);
    }

    // If we are handling a preview, skip locking
    if ($form_state['rebuild'] == TRUE) {

      // We dont need anything here right now
    }
    else {
      if ($form_state['submitted'] === FALSE) {

        // Finally set the lock if everthing passed.
        if (content_lock_node($nid, $user->uid) == false) {

          // could not lock node, its locked by someone else
          drupal_goto("node/{$nid}");
        }
      }
    }

    // else if($form_state['submitted'] === TRUE)
    // if it is a submission, we would not need to lock once again, as we had before.
    // as nodeapi insert/update are not called on preview, the node should stay locked until saved or canceled.
  }
}