fix: show error if user tries to add same manga

Author: oae

src/components/addManga/form.tsx

@@ -91,6 +91,7 @@ export function AddMangaForm({ onClose }: { onClose: () => void }) {
       form.setFieldValue('query', '');
       form.setFieldValue('mangaOrder', -1);
       form.setFieldValue('mangaTitle', '');
+      form.setFieldValue('interval', '');
     }
     if (active === 3) {
       form.setFieldValue('interval', '');
@@ -117,7 +118,7 @@ export function AddMangaForm({ onClose }: { onClose: () => void }) {
         title: 'Manga',
         message: (
           <Text>
-            Failed to create add manga. <Code color="red">{`${err}`}</Code>
+            <Code color="red">{`${err}`}</Code>
           </Text>
         ),
       });

src/server/trpc/router/manga.ts

@@ -1,3 +1,4 @@
+import { TRPCError } from '@trpc/server';
 import { z } from 'zod';
 import { getAvailableSources, getMangaDetail, search } from '../../../utils/mangal';
 import { t } from '../trpc';
@@ -71,7 +72,10 @@ export const mangaRouter = t.router({
         },
       });
       if (result) {
-        return result;
+        throw new TRPCError({
+          code: 'CONFLICT',
+          message: `${title} already exists in the library.`,
+        });
       }
 
       return ctx.prisma.manga.create({