Persist slice of redux state in local storage

ui/src/localStorage.ts

@@ -0,0 +1,24 @@
+import { AppState } from "./store";
+
+const LOCAL_STORAGE_KEY = "asynqmon:state";
+
+export function loadState(): AppState | undefined {
+  try {
+    const serializedState = localStorage.getItem(LOCAL_STORAGE_KEY);
+    if (serializedState === null) {
+      return undefined;
+    }
+    return JSON.parse(serializedState);
+  } catch (err) {
+    return undefined;
+  }
+}
+
+export function saveState(state: AppState) {
+  try {
+    const serializedState = JSON.stringify({ settings: state.settings });
+    localStorage.setItem(LOCAL_STORAGE_KEY, serializedState);
+  } catch (err) {
+    console.error("saveState: could not save state: ", err);
+  }
+}