refactor: #6 check update over one hour and debound scroll

app/store/update.ts

@@ -0,0 +1,49 @@
+import { create } from "zustand";
+import { persist } from "zustand/middleware";
+import { FETCH_COMMIT_URL } from "../constant";
+import { getCurrentCommitId } from "../utils";
+
+export interface UpdateStore {
+  lastUpdate: number;
+  remoteId: string;
+
+  getLatestCommitId: (force: boolean) => Promise<string>;
+}
+
+export const UPDATE_KEY = "chat-update";
+
+export const useUpdateStore = create<UpdateStore>()(
+  persist(
+    (set, get) => ({
+      lastUpdate: 0,
+      remoteId: "",
+
+      async getLatestCommitId(force = false) {
+        const overOneHour = Date.now() - get().lastUpdate > 3600 * 1000;
+        const shouldFetch = force || overOneHour;
+        if (!shouldFetch) {
+          return getCurrentCommitId();
+        }
+
+        try {
+          const data = await (await fetch(FETCH_COMMIT_URL)).json();
+          const sha = data[0].sha as string;
+          const remoteId = sha.substring(0, 7);
+          set(() => ({
+            lastUpdate: Date.now(),
+            remoteId,
+          }));
+          console.log("[Got Upstream] ", remoteId);
+          return remoteId;
+        } catch (error) {
+          console.error("[Fetch Upstream Commit Id]", error);
+          return getCurrentCommitId();
+        }
+      },
+    }),
+    {
+      name: UPDATE_KEY,
+      version: 1,
+    }
+  )
+);