From 07fc14091e49954d9c26675ba8f2be25a88c5dbf Mon Sep 17 00:00:00 2001
From: Manuel Cillero <manuel@cillero.es>
Date: Wed, 26 Jul 2017 08:45:10 +0200
Subject: [PATCH] Disable outline information on node types not enabled for
 book outlines

---
 modules/book/book.admin.inc | 9 +++++++++
 modules/book/book.module    | 8 ++++++--
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/modules/book/book.admin.inc b/modules/book/book.admin.inc
index 84cbe13..43607dc 100644
--- a/modules/book/book.admin.inc
+++ b/modules/book/book.admin.inc
@@ -27,6 +27,15 @@ function book_admin_overview() {
  */
 function book_admin_settings() {
   $types = node_get_types('names');
+
+  // Patch http://drupal.org/node/502430:
+  $form['book_restrict_to_types'] = array(
+    '#type' => 'checkbox',
+    '#title' => t('Enforce Allowed Types Restrictions'),
+    '#description' => t('Restrict outline capabilities to only the enabled content types below, even with "administer book outlines" permission.'),
+    '#default_value' => variable_get('book_restrict_to_types', false),
+  );
+
   $form['book_allowed_types'] = array(
     '#type' => 'checkboxes',
     '#title' => t('Allowed book outline types'),
diff --git a/modules/book/book.module b/modules/book/book.module
index 56f839a..fa116b8 100644
--- a/modules/book/book.module
+++ b/modules/book/book.module
@@ -149,7 +149,10 @@ function book_menu() {
  * Menu item access callback - determine if the outline tab is accessible.
  */
 function _book_outline_access($node) {
-  return user_access('administer book outlines') && node_access('view', $node);
+  // Patch http://drupal.org/node/502430:
+  $restrict = variable_get('book_restrict_to_types', false);
+  $types = variable_get('book_allowed_types', array('book'));
+  return (user_access('administer book outlines') && ((in_array($node->type, $types)) || (!$restrict))) && node_access('update', $node);
 }
 
 /**
@@ -286,7 +289,8 @@ function book_form_alter(&$form, $form_state, $form_id) {
     // Add elements to the node form
     $node = $form['#node'];
 
-    $access = user_access('administer book outlines');
+    // Patch http://drupal.org/node/502430:
+    $access = _book_outline_access($node);
     if (!$access) {
       if (user_access('add content to books') && ((!empty($node->book['mlid']) && !empty($node->nid)) || book_type_is_allowed($node->type))) {
         // Already in the book hierarchy or this node type is allowed