Add /api/statistics/type GET proxy call

src/routes/api/statistics/type/+server.ts

@@ -0,0 +1,27 @@
+import type { ErrorMessage } from "$lib/api";
+import { get_stats_for, type StatsTypeCurrencyChart } from "$lib/entities";
+import type { RequestHandler } from "./$types";
+
+function isErrorMessage(value: any): value is ErrorMessage {
+  return value && typeof value.message === 'string';
+}
+
+export const GET: RequestHandler = async ({ cookies }): Promise<Response> => {
+  const session = cookies.get('session');
+
+  // const queryParams = url.searchParams.toString();
+  // Check if the entity is valid
+  if (!session) {
+    return new Response(JSON.stringify("no cookies"), { status: 401 });
+  }
+
+  // TypeScript type inference for entity
+  const result = await get_stats_for<StatsTypeCurrencyChart[]>("type", session);
+
+  if (isErrorMessage(result)) {
+    console.log("ERROR");
+    return new Response(JSON.stringify(result), { status: 500 });
+  }
+
+  return new Response(JSON.stringify(result), { status: 200 });
+}