- // Update models only if there's a change in parent chain or ordering.
- if ($model->priority !== $priority || $model->book_id !== $bookId || ($isPage && $model->chapter_id !== $chapterId)) {
- $this->entityRepo->changeBook($isPage?'page':'chapter', $bookId, $model);
- $model->priority = $priority;
- if ($isPage) $model->chapter_id = $chapterId;
+ // Get the books involved in the sort
+ $bookIdsInvolved = $bookIdsInvolved->unique()->toArray();
+ $booksInvolved = $this->entityRepo->book->newQuery()->whereIn('id', $bookIdsInvolved)->get();
+ // Throw permission error if invalid ids or inaccessible books given.
+ if (count($bookIdsInvolved) !== count($booksInvolved)) {
+ $this->showPermissionError();
+ }
+ // Check permissions of involved books
+ $booksInvolved->each(function (Book $book) {
+ $this->checkOwnablePermission('book-update', $book);
+ });
+
+ // Perform the sort
+ $sortMap->each(function ($mapItem) {
+ $model = $mapItem->model;
+
+ $priorityChanged = intval($model->priority) !== intval($mapItem->sort);
+ $bookChanged = intval($model->book_id) !== intval($mapItem->book);
+ $chapterChanged = ($mapItem->type === 'page') && intval($model->chapter_id) !== $mapItem->parentChapter;
+
+ if ($bookChanged) {
+ $this->entityRepo->changeBook($mapItem->type, $mapItem->book, $model);
+ }
+ if ($chapterChanged) {
+ $model->chapter_id = intval($mapItem->parentChapter);