feat: implement random book background feature in ClientLayout, allowing dynamic background images from selected Komga libraries

src/app/api/komga/random-book/route.ts

@@ -0,0 +1,53 @@
+import { NextResponse } from "next/server";
+import type { NextRequest } from "next/server";
+import { BookService } from "@/lib/services/book.service";
+import { ERROR_CODES } from "@/constants/errorCodes";
+import { AppError } from "@/utils/errors";
+import { getErrorMessage } from "@/utils/errors";
+
+export const dynamic = "force-dynamic";
+
+export async function GET(request: NextRequest) {
+  try {
+    const { searchParams } = new URL(request.url);
+    const libraryIds = searchParams.get("libraryIds")?.split(",") || [];
+
+    if (libraryIds.length === 0) {
+      return NextResponse.json(
+        {
+          error: {
+            code: ERROR_CODES.LIBRARY.FETCH_ERROR,
+            message: "Au moins une bibliothèque doit être sélectionnée",
+          },
+        },
+        { status: 400 }
+      );
+    }
+
+    const bookId = await BookService.getRandomBookFromLibraries(libraryIds);
+    return NextResponse.json({ bookId });
+  } catch (error) {
+    console.error("Erreur lors de la récupération d'un livre aléatoire:", error);
+    if (error instanceof AppError) {
+      return NextResponse.json(
+        {
+          error: {
+            code: error.code,
+            message: getErrorMessage(error.code),
+          },
+        },
+        { status: 500 }
+      );
+    }
+    return NextResponse.json(
+      {
+        error: {
+          code: ERROR_CODES.SERIES.FETCH_ERROR,
+          message: getErrorMessage(ERROR_CODES.SERIES.FETCH_ERROR),
+        },
+      },
+      { status: 500 }
+    );
+  }
+}
+