Greatly reduce repeated code

functions/api/mod-queue/list.ts

@@ -1,3 +1,5 @@
+import { jsonError, jsonResponse } from "../../common.js";
+
 export async function onRequestGet(context: RequestContext) {
   const { searchParams } = new URL(context.request.url);
   const before = parseInt(searchParams.get("before") || `${Date.now()}`);
@@ -21,28 +23,13 @@ export async function onRequestGet(context: RequestContext) {
   const { current_user: currentUser } = context.data;
 
   if (!entryType || !types[entryType])
-    return new Response('{"error":"Invalid filter type"}', {
-      headers: {
-        "content-type": "application/json",
-      },
-      status: 400,
-    });
+    return jsonError("Invalid filter type", 400);
 
   if (!permissions[entryType].find((p) => currentUser.permissions & p))
-    return new Response('{"error":"You cannot use this filter"}', {
-      headers: {
-        "content-type": "application/json",
-      },
-      status: 403,
-    });
+    return jsonError("You cannot use this filter", 403);
 
   if (isNaN(before) || before > Date.now())
-    return new Response('{"error":"Invalid `before` parameter"}', {
-      headers: {
-        "content-type": "application/json",
-      },
-      status: 400,
-    });
+    return jsonError("Invalid `before` parameter", 400);
 
   const prefix = types[entryType];
   const table = tables[entryType];
@@ -77,9 +64,5 @@ export async function onRequestGet(context: RequestContext) {
       }
     }
 
-  return new Response(JSON.stringify(items.filter((v) => v !== null)), {
-    headers: {
-      "content-type": "application/json",
-    },
-  });
+  return jsonResponse(JSON.stringify(items.filter((v) => v !== null)));
 }