add initial files

src/server/services/artists.service.ts

@@ -0,0 +1,81 @@
+import { Request } from 'express';
+import { prisma } from '../lib';
+import { OffsetPagination, User } from '../types/types';
+import {
+  ApiError,
+  ApiSuccess,
+  folderPermissions,
+  splitNumberString,
+} from '../utils';
+
+const findById = async (options: { id: number; user: User }) => {
+  const { id, user } = options;
+
+  const artist = await prisma.artist.findUnique({
+    include: { genres: true, serverFolders: true },
+    where: { id },
+  });
+
+  if (!artist) {
+    throw ApiError.notFound('');
+  }
+
+  const serverFolderIds = artist.serverFolders.map(
+    (serverFolder) => serverFolder.id
+  );
+
+  if (!(await folderPermissions(serverFolderIds, user))) {
+    throw ApiError.forbidden('');
+  }
+
+  return ApiSuccess.ok({ data: artist });
+};
+
+const findMany = async (
+  req: Request,
+  options: { serverFolderIds: string; user: User } & OffsetPagination
+) => {
+  const { user, limit, page, serverFolderIds: rServerFolderIds } = options;
+  const serverFolderIds = splitNumberString(rServerFolderIds);
+
+  if (!(await folderPermissions(serverFolderIds!, user))) {
+    throw ApiError.forbidden('');
+  }
+
+  const serverFoldersFilter = serverFolderIds!.map((serverFolderId: number) => {
+    return {
+      serverFolders: {
+        some: {
+          id: { equals: Number(serverFolderId) },
+        },
+      },
+    };
+  });
+
+  const startIndex = limit * page;
+  const totalEntries = await prisma.artist.count({
+    where: { OR: serverFoldersFilter },
+  });
+  const artists = await prisma.artist.findMany({
+    include: { genres: true },
+    skip: startIndex,
+    take: limit,
+    where: { OR: serverFoldersFilter },
+  });
+
+  return ApiSuccess.ok({
+    data: artists,
+    paginationItems: {
+      limit,
+      page,
+      startIndex,
+      totalEntries,
+      url: req.originalUrl,
+    },
+  });
+};
+
+export const artistsService = {
+  findById,
+  findMany,
+};