feat: add json store utils

app/javascript/shared/helpers/localStorage.js

@@ -19,7 +19,7 @@ export const LocalStorage = {
     } else {
       window.localStorage.setItem(key, value);
     }
-    window.localStorage.setItem(key + ':ts', Date.now());
+    window.localStorage.setItem(key + ':ts', Date.now().toString());
   },
 
   setFlag(store, accountId, key, expiry = 24 * 60 * 60 * 1000) {
@@ -46,4 +46,39 @@ export const LocalStorage = {
     window.localStorage.removeItem(key);
     window.localStorage.removeItem(key + ':ts');
   },
+
+  updateJsonStore(storeName, key, value) {
+    try {
+      const storedValue = this.get(storeName) || {};
+      storedValue[key] = value;
+      this.set(storeName, storedValue);
+    } catch (e) {
+      // eslint-disable-next-line no-console
+      console.error('Error updating JSON store in localStorage', e);
+    }
+  },
+
+  getFromJsonStore(storeName, key) {
+    try {
+      const storedValue = this.get(storeName) || {};
+      return storedValue[key] || null;
+    } catch (e) {
+      // eslint-disable-next-line no-console
+      console.error('Error getting value from JSON store in localStorage', e);
+      return null;
+    }
+  },
+
+  deleteFromJsonStore(storeName, key) {
+    try {
+      const storedValue = this.get(storeName);
+      if (storedValue && key in storedValue) {
+        delete storedValue[key];
+        this.set(storeName, storedValue);
+      }
+    } catch (e) {
+      // eslint-disable-next-line no-console
+      console.error('Error deleting entry from JSON store in localStorage', e);
+    }
+  },
 };