Validate and deduplicate custom difficulty presets

lib/api.ts

@@ -13,7 +13,11 @@ import {
   viewpointSchema,
 } from "../shared/protocol";
 import { mediaUrl, mediaUrls } from "./catalog";
-import { ServiceError, checkServiceError } from "./service-error";
+import {
+  ServiceError,
+  checkServiceError,
+  checkDifficultyPresetError,
+} from "./service-error";
 import { requestOrigin, verifyOrigin } from "./request-origin";
 import { browserAccount } from "./request-security";
 import { jsonBody } from "./json-body";
@@ -165,12 +169,7 @@ export async function handle(request: NextRequest, path: string[]) {
           .insert(body)
           .select("id,name,seconds,zoom")
           .single();
-        if (error?.code === "23505")
-          throw new ServiceError(
-            "A difficulty with that name already exists",
-            409,
-          );
-        checkServiceError(error);
+        checkDifficultyPresetError(error);
         return NextResponse.json({ preset: data });
       }
     }
@@ -202,10 +201,7 @@ export async function handle(request: NextRequest, path: string[]) {
         const body = z
           .object({
             datasetId: idSchema,
-            difficulty: z.union([
-              z.enum(["easy", "normal", "hard"]),
-              idSchema,
-            ]),
+            difficulty: z.union([z.enum(["easy", "normal", "hard"]), idSchema]),
           })
           .parse(await jsonBody(request));
         const secret = cookieSecret(request) || randomBytes(32).toString("hex");