feat: recent lists

resources/ts/lib/lang.ts

@@ -1,4 +1,4 @@
-import { getCookie, setCookie } from "./cookies";
+import { getCookie, setCookie } from "@/lib/cookies";
 
 export function getLang() {
     const params = new URLSearchParams(document.location.search);

resources/ts/lib/lists.ts

@@ -0,0 +1,20 @@
+import { getCookie, setCookie } from "@/lib/cookies";
+
+const COOKIE_NAME = "recent-lists";
+const MAX_RECENT_LISTS = 32;
+
+export function getRecentLists(): string[] {
+    const rawData = getCookie(COOKIE_NAME, "");
+    if (!rawData) {
+        return [];
+    }
+    return rawData.split(",");
+}
+
+export function saveRecentList(list: string): void {
+    const recentLists = [list]
+        .concat(getRecentLists())
+        .filter((v, i, a) => a.indexOf(v) === i)
+        .slice(0, MAX_RECENT_LISTS);
+    setCookie(COOKIE_NAME, recentLists.join(","));
+}