<?php
/**
 * @file
 * Handle the display of vertical tabs on a per content type basis.
 */

module_load_include('inc', 'hide_vtabs');

define('HIDE_VTAB_STATUS_HIDDEN', 0);
define('HIDE_VTAB_STATUS_ENABLED', 1);
define('HIDE_VTAB_STATUS_REVISION_ONLY', 2);

/**
 * Implements hook_permission().
 */
function hide_vtabs_permission() {
  return array(
    'administer hide_vtabs' => array(
      'title' => t('Administer vertical tabs on content types'),
    ),
  );
}

/**
 * Implement hook_form_BASE_FORM_ID_alter().
 */
function hide_vtabs_form_node_type_form_alter(&$form, &$form_state) {
  $node_type = $form['#node_type']->type;

  $user_options = user_roles();
  $options = array(
    HIDE_VTAB_STATUS_ENABLED => 'Show vertical tabs',
    HIDE_VTAB_STATUS_HIDDEN => 'Hide vertical tabs',
    HIDE_VTAB_STATUS_REVISION_ONLY => 'Show revision only',
  );

  $form['hide_vtabs'] = array(
    '#type' => 'fieldset',
    '#title' => t('Hide Vertical Tabs'),
    '#access' => user_access('administer hide_vtabs'),
    '#collapsible' => TRUE,
    '#group' => 'additional_settings',
    '#description' => t('Specify display settings of vertical tabs on current content type.'),
  );

  $form['hide_vtabs']['vtabs_status'] = array(
    '#type' => 'radios',
    '#default_value' => variable_get('hide_vtab_node_' . $node_type . '_status', HIDE_VTAB_STATUS_ENABLED),
    '#options' => $options,
    '#description' => t('Options available for vertical tabs visibility. "Show revision only" option will become a fieldset.'),
  );
  $form['hide_vtabs']['vtabs_roles'] = array(
    '#type' => 'checkboxes',
    '#title' => 'User roles',
    '#default_value' => _hide_vtabs_default_roles_content_type($node_type, $user_options),
    '#options' => $user_options,
    '#states' => array(
      'visible' => array(
        ':input[name="vtabs_status"]' => array(
          'value' => HIDE_VTAB_STATUS_HIDDEN,
        ),
      ),
    ),
    '#description' => t('Choose which roles will have the tabs hidden.'),
  );

  $form['#submit'][] = 'hide_vtabs_node_type_submit';
}

/**
 * Submit handler to input the vertical tabs status.
 */
function hide_vtabs_node_type_submit(&$form, &$form_state) {
  $node_type = $form['#node_type']->type;
  variable_set('hide_vtab_node_' . $node_type . '_status', $form_state['values']['vtabs_status']);
  foreach ($form_state['values']['vtabs_roles'] as $rid => $selection) {
    $role_name = _hide_vtabs_retrieve_role_name($rid);
    variable_set('hide_vtab_node_' . $node_type . '_' . $role_name, $selection);
  }
}

/**
 * Implements hook_form_BASE_FORM_ID_alter().
 */
function hide_vtabs_form_node_form_alter(&$form, &$form_state) {
  global $user;
  $hide_tabs = FALSE;
  $node_type = $form['type']['#value'];
  $vtabs_status = variable_get('hide_vtab_node_' . $node_type . '_status', HIDE_VTAB_STATUS_ENABLED);

  if (HIDE_VTAB_STATUS_ENABLED != $vtabs_status) {
    if (HIDE_VTAB_STATUS_REVISION_ONLY == $vtabs_status) {
      unset($form['revision_information']['#group']);
      $form['revision_information']['#collapsible'] = FALSE;
      $form['revision_information']['#collapsed'] = TRUE;
      $hide_tabs = TRUE;
    }

    $vtabs_roles = _hide_vtabs_default_roles_content_type($node_type, $user->roles);
    if ($hide_tabs || $vtabs_roles) {
      foreach ($form as $key => $value) {
        if (is_array($form[$key]) && isset($form[$key]['#group'])) {
          $form[$key]['#access'] = FALSE;
        }
      }
    }
  }
}