[api] Add PersistentStorage

Wrapper for LocalStorage on browsers and Storage plugin on capacitor

api/index.ts

@@ -4,5 +4,6 @@ export * from './src/stores/';
 
 export * from './src/utils/datetime';
 export * from './src/utils/permission';
+export * from './src/utils/persistent';
 export * from './src/utils/validators';
 export * from './src/utils/misc';

api/src/utils/persistent.ts

@@ -0,0 +1,35 @@
+import { LocalStorage, Platform } from 'quasar';
+import { Storage } from '@capacitor/storage';
+
+type GetReturn = Date | number | boolean | string | object;
+
+export class PersistentStorage {
+  static clear() {
+    if (Platform.is.capacitor) return Storage.clear();
+    else return Promise.resolve(LocalStorage.clear());
+  }
+
+  static remove(key: string) {
+    if (Platform.is.capacitor) return Storage.remove({ key: key });
+    else return Promise.resolve(LocalStorage.remove(key));
+  }
+
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  static set(key: string, value: any) {
+    if (Platform.is.capacitor) return Storage.set({ key, value: JSON.stringify(value) });
+    else return Promise.resolve(LocalStorage.set(key, value));
+  }
+
+  static get<T extends GetReturn>(key: string) {
+    if (Platform.is.capacitor)
+      return Storage.get({ key }).then((v) =>
+        v.value === null ? null : (JSON.parse(v.value) as T)
+      );
+    else return Promise.resolve(LocalStorage.getItem<T>(key));
+  }
+
+  static keys() {
+    if (Platform.is.capacitor) return Storage.keys().then((v) => v.keys);
+    else return Promise.resolve(LocalStorage.getAllKeys());
+  }
+}