added chapter view, fixes, added ratings, added chapter updates/deletions

app/server/graphql/resolvers/bookChapterDelete.ts

@@ -0,0 +1,25 @@
+import { ensureIdentity } from '@app/server/helpers';
+import { IdentityContext } from '@app/server/identity';
+import { prisma } from '@app/server/prisma/client';
+import { updateBookStats } from '@app/server/service/book';
+import { Book, MutationBookChapterDeleteArgs } from '@generated/types';
+import { toBookSchema } from './mappers/bookMapper';
+
+export async function BookChapterDeleteResolver(
+  _: any,
+  { id }: MutationBookChapterDeleteArgs,
+  { req, res, identity }: IdentityContext
+): Promise<Book> {
+  ensureIdentity(identity);
+  const model = await prisma.bookChapter.findUniqueOrThrow({
+    where: { id },
+    select: { book: { select: { id: true, authorId: true } } }
+  });
+  if (identity.id !== model.book.authorId) throw new Error('Operation is not permitted.');
+
+  await prisma.bookChapter.delete({ where: { id } });
+
+  await updateBookStats(model.book.id);
+  const book = await prisma.book.findUniqueOrThrow({ where: { id: model.book.id } });
+  return toBookSchema(book, { req, res, identity });
+}