Switch storage to react-native-mmkv

package.json

@@ -37,6 +37,8 @@
     "react-native": "0.79.6",
     "react-native-draggable-flatlist": "^4.0.3",
     "react-native-gesture-handler": "~2.24.0",
+    "react-native-mmkv": "^4.1.2",
+    "react-native-nitro-modules": "^0.34.1",
     "react-native-reanimated": "~3.17.4",
     "react-native-safe-area-context": "5.4.0",
     "react-native-screens": "~4.11.1",

src/core/storage/storageService.ts

@@ -1,38 +1,36 @@
 // src/core/storage/storageService.ts
-import * as FileSystem from 'expo-file-system';
+import { createMMKV } from 'react-native-mmkv';
 import { AppData } from '../store/appStore';
 
-const dataFilePath = `${FileSystem.documentDirectory}muhsinData.json`;
+const storage = createMMKV();
+const DATA_KEY = 'muhsinData';
 
 /**
- * Loads the application data from the file system.
+ * Loads the application data from storage.
  * @returns {Promise<AppData | null>} The parsed data or null if it doesn't exist.
  */
-export const loadDataFromFile = async (): Promise<AppData | null> => {
+export const loadData = async (): Promise<AppData | null> => {
   try {
-    const fileInfo = await FileSystem.getInfoAsync(dataFilePath);
-    if (!fileInfo.exists) {
-      console.log('Data file does not exist. Starting fresh.');
-      return null;
+    const storedData = storage.getString(DATA_KEY);
+    if (storedData) {
+      return JSON.parse(storedData) as AppData;
     }
-    const content = await FileSystem.readAsStringAsync(dataFilePath);
-    return JSON.parse(content) as AppData;
+
+    return null;
   } catch (error) {
-    console.error('Failed to load data from file:', error);
-    // In case of parsing error, etc., we treat it as no data found.
+    console.error('Failed to load data from storage:', error);
     return null;
   }
 };
 
 /**
- * Saves the application data to the file system.
+ * Saves the application data to MMKV storage.
  * @param {AppData} data The data to save.
  */
-export const saveDataToFile = async (data: AppData): Promise<void> => {
+export const saveData = (data: AppData): void => {
   try {
-    const content = JSON.stringify(data, null, 2); // Pretty print JSON
-    await FileSystem.writeAsStringAsync(dataFilePath, content);
+    storage.set(DATA_KEY, JSON.stringify(data));
   } catch (error) {
-    console.error('Failed to save data to file:', error);
+    console.error('Failed to save data to MMKV:', error);
   }
 };

src/core/store/appStore.ts

@@ -2,7 +2,7 @@
 import { create } from 'zustand';
 import { Deed, DeedLog, DeedStatus } from '../data/models';
 import { GENERIC_STATUSES, MOCK_DEEDS, MOCK_LOGS, SUGGESTED_DEEDS } from '../data/mock';
-import { loadDataFromFile, saveDataToFile } from '../storage/storageService';
+import { loadData, saveData } from '../storage/storageService';
 import { formatISO } from 'date-fns';
 import { Alert, Appearance, I18nManager } from 'react-native';
 import { generateDemoLogs } from '../data/demoData';
@@ -82,7 +82,7 @@ const persistState = (state: AppState) => {
     dataToSave.logs = loadedData.logs;
   }
 
-  saveDataToFile(dataToSave);
+  saveData(dataToSave);
 };
 
 const useAppStore = create<AppState & AppActions>((set, get) => ({
@@ -96,7 +96,7 @@ const useAppStore = create<AppState & AppActions>((set, get) => ({
 
   // --- ACTIONS ---
   initialize: async () => {
-    const loadedData = await loadDataFromFile();
+    const loadedData = await loadData();
     let settings = defaultSettings;
     let initialDeeds = MOCK_DEEDS;
     let initialLogs = MOCK_LOGS;
@@ -310,7 +310,7 @@ const useAppStore = create<AppState & AppActions>((set, get) => ({
       Alert.alert(i18n.t('alerts.demoModeEnabledTitle'), i18n.t('alerts.demoModeEnabledMessage'));
     } else {
       // Disabling Demo Mode: Reload user's original data from disk
-      const originalData = await loadDataFromFile();
+      const originalData = await loadData();
       set({
         deeds: originalData?.deeds || MOCK_DEEDS,
         logs: originalData?.logs || [],
@@ -334,7 +334,7 @@ const useAppStore = create<AppState & AppActions>((set, get) => ({
     } else {
       Appearance.setColorScheme(theme);
     }
-    await saveDataToFile(initialState);
+    saveData(initialState);
     await cancelAllReminders();
   },