move rarankToABC into a different file

src/models/rank.ts

@@ -3,7 +3,7 @@
 import server$ from "solid-start/server";
 import {db, init} from "~/models/db";
 import predefinedCommunities from "~/predefined-communities";
-import { rankToABC } from "../routes/rank/[category]";
+import rankToABC from "~/models/rank-to-abc";
 
 interface Row {
     id: number,

src/routes/rank/[category].tsx

@@ -4,6 +4,8 @@ import { useParams, RouteDataArgs } from "solid-start";
 import { createServerData$ } from "solid-start/server";
 
 import Rank from "~/models/rank";
+import rankToABC from "~/models/rank-to-abc";
+
 import predefinedCommunities from "~/predefined-communities";
 
 
@@ -26,13 +28,6 @@ export function routeData({ params } : RouteDataArgs) {
     return ranks;
 }
 
-export const rankToABC = (rank: number, total: number) => {
-    rank /= total;
-    if (rank <= 0.01) return "A*";
-    if (rank <= 0.05) return "A";
-    if (rank <= 0.25) return "B";
-    return "C";
-}
 
 const EmptyRow = () => <>
 <tr class="bg-white border-b dark:bg-gray-800 dark:border-gray-700 hover:bg-gray-50 dark:hover:bg-gray-600">