카테고리 페이지에 파일 목록 부분 구현

src/lib/server/schemas/category.ts

@@ -17,6 +17,16 @@ export const categoryInfoResponse = z.object({
 });
 export type CategoryInfoResponse = z.infer<typeof categoryInfoResponse>;
 
+export const categoryFileAddRequest = z.object({
+  file: z.number().int().positive(),
+});
+export type CategoryFileAddRequest = z.infer<typeof categoryFileAddRequest>;
+
+export const categoryFileListResponse = z.object({
+  files: z.number().int().positive().array(),
+});
+export type CategoryFileListResponse = z.infer<typeof categoryFileListResponse>;
+
 export const categoryCreateRequest = z.object({
   parent: categoryIdSchema,
   mekVersion: z.number().int().positive(),

src/lib/server/services/category.ts

@@ -7,6 +7,7 @@ import {
   type NewCategory,
 } from "$lib/server/db/category";
 import { IntegrityError } from "$lib/server/db/error";
+import { getAllFilesByCategory, getFile, addFileToCategory } from "$lib/server/db/file";
 
 export const getCategoryInformation = async (userId: number, categoryId: CategoryId) => {
   const category = categoryId !== "root" ? await getCategory(userId, categoryId) : undefined;
@@ -27,6 +28,35 @@ export const getCategoryInformation = async (userId: number, categoryId: Categor
   };
 };
 
+export const addCategoryFile = async (userId: number, categoryId: number, fileId: number) => {
+  const category = await getCategory(userId, categoryId);
+  const file = await getFile(userId, fileId);
+  if (!category) {
+    error(404, "Invalid category id");
+  } else if (!file) {
+    error(404, "Invalid file id");
+  }
+
+  try {
+    await addFileToCategory(fileId, categoryId);
+  } catch (e) {
+    if (e instanceof IntegrityError && e.message === "File already added to category") {
+      error(400, "File already added");
+    }
+    throw e;
+  }
+};
+
+export const getCategoryFiles = async (userId: number, categoryId: number) => {
+  const category = await getCategory(userId, categoryId);
+  if (!category) {
+    error(404, "Invalid category id");
+  }
+
+  const files = await getAllFilesByCategory(userId, categoryId);
+  return { files: files.map(({ id }) => id) };
+};
+
 export const createCategory = async (params: NewCategory) => {
   const oneMinuteAgo = new Date(Date.now() - 60 * 1000);
   const oneMinuteLater = new Date(Date.now() + 60 * 1000);