Shelf permissions: reverted create removal

Reverted work in 847a57a49a.
Left test in but updated to new expectation.
Left migration in but removed content to prevent new pre-v23.06
upgraders loosing shelf create permission status.
Added note to permission to describe use-case.

For #4375

database/migrations/2023_06_25_181952_remove_bookshelf_create_entity_permissions.php

@@ -12,9 +12,10 @@ return new class extends Migration
      */
     public function up()
     {
-        DB::table('entity_permissions')
-            ->where('entity_type', '=', 'bookshelf')
-            ->update(['create' => 0]);
+        // Note: v23.06.2
+        // Migration removed since change to remove bookshelf create permissions was reverted.
+        // Create permissions were removed as incorrectly thought to be unused, but they did
+        // have a use via shelf permission copy-down to books.
     }
 
     /**

lang/en/entities.php

@@ -106,6 +106,7 @@ return [
     'shelves_permissions_updated' => 'Shelf Permissions Updated',
     'shelves_permissions_active' => 'Shelf Permissions Active',
     'shelves_permissions_cascade_warning' => 'Permissions on shelves do not automatically cascade to contained books. This is because a book can exist on multiple shelves. Permissions can however be copied down to child books using the option found below.',
+    'shelves_permissions_create' => 'Shelf create permissions are only used for copying permissions to child books using the action below. They do not control the ability to create books.',
     'shelves_copy_permissions_to_books' => 'Copy Permissions to Books',
     'shelves_copy_permissions' => 'Copy Permissions',
     'shelves_copy_permissions_explain' => 'This will apply the current permission settings of this shelf to all books contained within. Before activating, ensure any changes to the permissions of this shelf have been saved.',

resources/views/form/entity-permissions-row.blade.php

@@ -44,11 +44,11 @@ $inheriting - Boolean if the current row should be marked as inheriting default
                 'disabled' => $inheriting
             ])
         </div>
-        @if($entityType !== 'page' && $entityType !== 'bookshelf')
+        @if($entityType !== 'page')
             <div class="px-l">
                 @include('form.custom-checkbox', [
                     'name' =>  'permissions[' . $role->id . '][create]',
-                    'label' => trans('common.create'),
+                    'label' => trans('common.create') . ($entityType === 'bookshelf' ? ' *'  : ''),
                     'value' => 'true',
                     'checked' => $permission->create,
                     'disabled' => $inheriting

resources/views/form/entity-permissions.blade.php

@@ -70,8 +70,17 @@
 
     <hr class="mb-m">
 
+    <div class="flex-container-row justify-space-between gap-m wrap">
+        <div class="flex min-width-m">
+            @if($model instanceof \BookStack\Entities\Models\Bookshelf)
+                <p class="small text-muted mb-none">
+                    * {{ trans('entities.shelves_permissions_create') }}
+                </p>
+            @endif
+        </div>
         <div class="text-right">
             <a href="{{ $model->getUrl() }}" class="button outline">{{ trans('common.cancel') }}</a>
             <button type="submit" class="button">{{ trans('entities.permissions_save') }}</button>
         </div>
+    </div>
 </form>

tests/Permissions/EntityPermissionsTest.php

@@ -413,13 +413,14 @@ class EntityPermissionsTest extends TestCase
         $this->entityRestrictionFormTest(Page::class, 'Page Permissions', 'delete', '2');
     }
 
-    public function test_shelf_create_permission_not_visible()
+    public function test_shelf_create_permission_visible_with_notice()
     {
         $shelf = $this->entities->shelf();
 
         $resp = $this->asAdmin()->get($shelf->getUrl('/permissions'));
         $html = $this->withHtml($resp);
-        $html->assertElementNotExists('input[name$="[create]"]');
+        $html->assertElementExists('input[name$="[create]"]');
+        $resp->assertSee('Shelf create permissions are only used for copying permissions to child books using the action below.');
     }
 
     public function test_restricted_pages_not_visible_in_book_navigation_on_pages()