add web support - sqlite, indexeddb, asyncstorage

.eslintignore

@@ -0,0 +1 @@
+expo-env.d.ts

.eslintrc.js

@@ -3,7 +3,7 @@ module.exports = {
   extends: ['expo', 'prettier', 'plugin:prettier/recommended'],
   plugins: ['prettier'],
   rules: {
-    "eslint-comments/no-unlimited-disable": 0,
-    "prettier/prettier": ["error"],
-  }
+    'eslint-comments/no-unlimited-disable': 0,
+    'prettier/prettier': ['error'],
+  },
 };

README.md

@@ -1,21 +1,29 @@
 # React Native SQLite Expo Demo
 
 A demo application built with Expo and React Native, showcasing the integration of SQLite 
-using expo-sqlite within an expo-router project. This app serves as an example of:
-- Database SQLite Migration
-- Integration Testing: Run integration tests for expo-sqlite in a Node.js environment.
-The app functions as a simple "CRUD" (Create, Read, Delete) tasks manager.
+using expo-sqlite within an expo-router project. 
+Works natively and on the web.
 
+# Chapters
+## 1. Database migrations and integration testing
+I made first version of the app to showcase how you can to database migrations 
+and configure integration tests to be run in a Node.js environment.
 Read more about it in my blog post on [expo sqlite migrations and integration testing](https://www.amarjanica.com/bridging-the-gap-between-expo-sqlite-and-node-js/)
 or [watch my YT tutorial](https://youtu.be/5OBi4JtlGfY).
+[Codebase](https://github.com/amarjanica/react-native-sqlite-expo-demo/tree/98c355d5b1fa065a5ec6585273232908edfe50ec)
+
+## 2. Web support with SQLite, AsyncStorage and IndexedDB
+I've added web support to the app, so it can run on the web. You can dynamically switch between
+different storage types: SQLite, AsyncStorage and IndexedDB. SQLite is supported on the web via
+[sql.js](https://github.com/sql-js/sql.js/).
 
 # App Screenshot
 <p align="center">
 <img src="preview.png" alt="App Screenshot example" height="300"/>
 </p>
 
 # Run it on Android
-I've tested this demo only on android emulator.
+I've tested this demo natively on android emulator.
 ```sh
 npm i
 # runs on expo go
@@ -24,5 +32,16 @@ npm run go:android
 npm run dev:android
 ```
 
+# Web App Screenshot
+<p align="center">
+<img src="preview-web.png" alt="Web app Screenshot example" height="300"/>
+</p>
+
+# Run it on the web
+```sh
+npm i
+npm run web
+```
+
 # Tests
 Tests don't need an emulator. They're just `jest` tests that you can run with `npm test` like any nodejs project.

app.config.ts

@@ -1,31 +1,34 @@
 /* eslint-env node */
-import { ExpoConfig } from "@expo/config-types";
+import { ExpoConfig } from '@expo/config-types';
 
 const config: ExpoConfig = {
-  jsEngine: "hermes",
-  scheme: "demo",
-  name: "react-native-sqlite-expo-demo",
-  slug: "react-native-sqlite-expo-demo",
-  version: "1.0.0",
-  orientation: "portrait",
-  icon: "./assets/icon.png",
-  userInterfaceStyle: "light",
+  jsEngine: 'hermes',
+  scheme: 'demo',
+  name: 'react-native-sqlite-expo-demo',
+  slug: 'react-native-sqlite-expo-demo',
+  version: '1.0.0',
+  orientation: 'portrait',
+  icon: './assets/icon.png',
+  userInterfaceStyle: 'light',
   splash: {
-    image: "./assets/splash.png",
-    resizeMode: "contain",
-    backgroundColor: "#ffffff",
+    image: './assets/splash.png',
+    resizeMode: 'contain',
+    backgroundColor: '#ffffff',
+  },
+  extra: {
+    dbName: 'test',
   },
   ios: {
     supportsTablet: true,
   },
   android: {
-    package: "com.amarjanica.reactnativesqliteexpodemo",
+    package: 'com.amarjanica.reactnativesqliteexpodemo',
     adaptiveIcon: {
-      foregroundImage: "./assets/adaptive-icon.png",
-      backgroundColor: "#ffffff",
+      foregroundImage: './assets/adaptive-icon.png',
+      backgroundColor: '#ffffff',
     },
   },
-  plugins: ["expo-router"],
+  plugins: ['expo-router'],
   experiments: {
     typedRoutes: true,
   },

app/_layout.tsx

@@ -1,47 +1,62 @@
 import { Slot } from 'expo-router';
 import { SafeAreaView } from 'react-native-safe-area-context';
-import { KeyboardAvoidingView, Platform, StyleSheet } from 'react-native';
+import { Button, KeyboardAvoidingView, Platform, StyleSheet, View, Text } from 'react-native';
 import React from 'react';
-import migrations from '../migrations';
-import DbMigrationRunner from '@/DbMigrationRunner';
-import logger from '@/logger';
-import { SQLiteDatabase } from 'expo-sqlite';
-import SQLiteProvider from '@/SQLiteProvider';
+import AppDataProvider from '@/data/providers/AppDataProvider';
+import { PersistenceType } from '@/data/types';
 
 const Root = () => {
-  const [ready, setReady] = React.useState(false);
-  const migrateDbIfNeeded = async (db: SQLiteDatabase) => {
-    try {
-      await new DbMigrationRunner(db).apply(migrations);
-      logger.log('All migrations applied.');
-      setReady(true);
-    } catch (err) {
-      logger.error(err);
-    }
-  };
+  const [persistenceType, setPersistenceType] = React.useState<PersistenceType>(
+    Platform.select({ web: PersistenceType.indexedDB, default: PersistenceType.sqlite })
+  );
+
   return (
     <SafeAreaView style={styles.container}>
       <KeyboardAvoidingView
         behavior={Platform.OS === 'ios' ? 'padding' : 'height'}
         style={styles.keyboardView}>
-        <SQLiteProvider
-          databaseName="test.db"
-          onInit={migrateDbIfNeeded}>
-          {ready && <Slot />}
-        </SQLiteProvider>
+        <AppDataProvider persistenceType={persistenceType}>
+          <Text style={styles.title}>
+            Persistence type: {persistenceType}, OS: {Platform.OS}
+          </Text>
+          <View style={styles.buttons}>
+            <Button
+              title={PersistenceType.localstorage}
+              onPress={() => setPersistenceType(PersistenceType.localstorage)}></Button>
+            <Button
+              title={PersistenceType.indexedDB}
+              onPress={() => setPersistenceType(PersistenceType.indexedDB)}></Button>
+            <Button
+              title={PersistenceType.sqlite}
+              onPress={() => setPersistenceType(PersistenceType.sqlite)}></Button>
+          </View>
+          <Slot />
+        </AppDataProvider>
       </KeyboardAvoidingView>
     </SafeAreaView>
   );
 };
 
 const styles = StyleSheet.create({
+  buttons: {
+    flexDirection: 'row',
+    justifyContent: 'space-around',
+    alignSelf: 'center',
+    width: '50%',
+    padding: 10,
+  },
   container: {
     flex: 1,
     backgroundColor: '#f8f8f8',
   },
   keyboardView: {
     flex: 1,
   },
+  title: {
+    textAlign: 'center',
+    fontSize: 20,
+    padding: 10,
+  },
 });
 
 export default Root;

app/detail/[id].tsx

@@ -1,34 +1,38 @@
 import { router, useLocalSearchParams } from 'expo-router';
-import TaskClient from '@/TaskClient';
 import React, { useState } from 'react';
 import { Task } from '@/types';
 import { Unmatched } from 'expo-router';
 import { Button, StyleSheet, Text, View } from 'react-native';
 import logger from '@/logger';
-import { useSQLiteContext } from '@/SQLiteProvider';
+import { useDataContext } from '@/data/DataContext';
 
 const Page = () => {
   const { id } = useLocalSearchParams<{ id: string }>();
-  const ctx = useSQLiteContext();
-  const client = new TaskClient(ctx);
+  const decodedId = parseInt(id);
+  const { tasksClient: client } = useDataContext();
   const [task, setTask] = useState<Task | null>(null);
   const [ready, setReady] = useState(false);
 
   const goBack = () => {
-    router.back();
+    if (router.canGoBack()) {
+      router.back();
+    } else {
+      router.push('/');
+    }
   };
+
   const handleDelete = async () => {
-    await client.delete(parseInt(id));
+    await client.delete(decodedId);
     goBack();
   };
 
   React.useEffect(() => {
     const prepare = async () => {
-      setTask(await client.task(id));
+      setTask(await client.task(decodedId));
     };
     logger.log('prepare detail');
     prepare().finally(() => setReady(true));
-  }, [id]);
+  }, [client, decodedId]);
 
   if (!ready) {
     return false;

app/index.tsx

@@ -1,16 +1,14 @@
 import { FlatList, Text, TextInput, TouchableOpacity, View } from 'react-native';
 import React, { useState } from 'react';
-import { useSQLiteContext } from '@/SQLiteProvider';
-import TaskClient from '@/TaskClient';
 import { Task } from '@/types';
 import logger from '@/logger';
 import type { ListRenderItem } from '@react-native/virtualized-lists';
 import { router } from 'expo-router';
 import globalStyles from '@/globalStyles';
+import { useDataContext } from '@/data/DataContext';
 
 const LandingPage = () => {
-  const ctx = useSQLiteContext();
-  const client = new TaskClient(ctx);
+  const { tasksClient: client } = useDataContext();
   const [tasks, setTasks] = useState<Task[]>([]);
   const [newTask, setNewTask] = useState('');
 

babel.config.js

@@ -1,4 +1,4 @@
-module.exports = function(api) {
+module.exports = function (api) {
   api.cache(true);
   return {
     presets: ['babel-preset-expo'],

migrations/001_initial.ts

@@ -1,17 +1,16 @@
-import { SQLiteDatabase } from 'expo-sqlite';
+import { SQLiteDatabase } from '@/data/sqliteDatabase';
 import { DatabaseMigration } from '@/types';
 
 const migration: DatabaseMigration = {
   name: 'create initial tables',
   async up(db: SQLiteDatabase): Promise<void> {
     await db.execAsync(`
 CREATE TABLE task (
-    id INTEGER PRIMARY KEY,
-    task TEXT NOT NULL,
+    id         INTEGER PRIMARY KEY,
+    task       TEXT NOT NULL,
     created_at TEXT DEFAULT CURRENT_TIMESTAMP,
     updated_at TEXT DEFAULT CURRENT_TIMESTAMP
-);
-`);
+);`);
   },
 };
 

migrations/002_populate.ts

@@ -1,4 +1,4 @@
-import { SQLiteDatabase } from 'expo-sqlite';
+import { SQLiteDatabase } from '@/data/sqliteDatabase';
 import { DatabaseMigration } from '@/types';
 
 const migration: DatabaseMigration = {