init
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import 'dart:async';
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import 'package:flutter/foundation.dart';
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import 'package:flutter_riverpod/flutter_riverpod.dart';
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import 'package:in_app_purchase/in_app_purchase.dart';
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import '../../../core/providers/app_providers.dart';
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import '../../config/application/app_config_controller.dart';
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/// Observable state for the in-app purchase flow.
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class IapState {
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const IapState({
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this.product,
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this.isLoading = false,
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this.isPurchasing = false,
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this.errorMessage,
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this.productsAvailable = false,
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this.lastEvent,
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});
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final ProductDetails? product;
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final bool isLoading;
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final bool isPurchasing;
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final String? errorMessage;
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final bool productsAvailable;
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/// Last human-readable event (e.g. "解锁成功").
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final String? lastEvent;
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IapState copyWith({
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ProductDetails? product,
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bool? isLoading,
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bool? isPurchasing,
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String? errorMessage,
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bool? productsAvailable,
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String? lastEvent,
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}) {
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return IapState(
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product: product ?? this.product,
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isLoading: isLoading ?? this.isLoading,
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isPurchasing: isPurchasing ?? this.isPurchasing,
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errorMessage: errorMessage,
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productsAvailable: productsAvailable ?? this.productsAvailable,
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lastEvent: lastEvent,
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);
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}
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}
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final iapControllerProvider = NotifierProvider<IapController, IapState>(
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IapController.new,
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);
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class IapController extends Notifier<IapState> {
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late final InAppPurchase _store = InAppPurchase.instance;
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StreamSubscription<List<PurchaseDetails>>? _sub;
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@override
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IapState build() {
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ref.onDispose(() {
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_sub?.cancel();
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_sub = null;
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});
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_init();
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return const IapState(isLoading: true);
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}
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Future<void> _init() async {
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final available = await _store.isAvailable();
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if (!available) {
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state = state.copyWith(
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isLoading: false,
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productsAvailable: false,
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errorMessage: '无法连接到 App Store，请检查网络设置',
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);
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return;
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}
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_sub = _store.purchaseStream.listen(
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_onPurchaseUpdated,
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onError: (Object e) {
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state = state.copyWith(isPurchasing: false, errorMessage: '支付失败：$e');
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},
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);
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await _loadProduct();
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}
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Future<void> _loadProduct() async {
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final response = await _store.queryProductDetails({kUnlockProductId});
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final error = response.error;
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if (error != null) {
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state = state.copyWith(
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isLoading: false,
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productsAvailable: false,
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errorMessage: '商品信息加载失败：${error.message}',
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);
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return;
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}
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final products = response.productDetails;
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if (products.isEmpty) {
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// No product configured in App Store Connect yet.
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state = state.copyWith(
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isLoading: false,
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productsAvailable: false,
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errorMessage: null,
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);
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return;
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}
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final product = products.first;
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state = state.copyWith(
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isLoading: false,
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productsAvailable: true,
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product: product,
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errorMessage: null,
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);
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}
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Future<void> buy() async {
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final product = state.product;
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if (product == null) {
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state = state.copyWith(errorMessage: '商品尚未就绪，请稍后再试');
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return;
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}
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state = state.copyWith(
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isPurchasing: true,
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errorMessage: null,
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lastEvent: null,
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);
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final param = PurchaseParam(productDetails: product);
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final ok = await _store.buyNonConsumable(purchaseParam: param);
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if (!ok) {
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state = state.copyWith(isPurchasing: false, errorMessage: '支付已取消');
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}
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}
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Future<void> restore() async {
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state = state.copyWith(
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isLoading: true,
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errorMessage: null,
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lastEvent: null,
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);
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await _store.restorePurchases();
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// The purchase stream will deliver restored purchases; clear loading after
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// a short delay in case nothing arrives.
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Future<void>.delayed(const Duration(seconds: 2), () {
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if (state.isLoading) {
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state = state.copyWith(
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isLoading: false,
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lastEvent: state.lastEvent ?? '未找到历史购买记录',
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);
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}
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});
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}
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void _onPurchaseUpdated(List<PurchaseDetails> purchases) {
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for (final purchase in purchases) {
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_handle(purchase);
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}
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}
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Future<void> _handle(PurchaseDetails purchase) async {
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switch (purchase.status) {
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case PurchaseStatus.purchased:
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case PurchaseStatus.restored:
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if (purchase.pendingCompletePurchase) {
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await _store.completePurchase(purchase);
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}
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await ref
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.read(appConfigProvider.notifier)
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.markUnlocked(
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fromRestore: purchase.status == PurchaseStatus.restored,
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);
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state = IapState(
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product: state.product,
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productsAvailable: state.productsAvailable,
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lastEvent: purchase.status == PurchaseStatus.restored
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? '权益已恢复'
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: '解锁成功！已获得无限记分权益',
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);
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break;
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case PurchaseStatus.error:
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state = state.copyWith(
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isPurchasing: false,
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errorMessage: '支付失败：${purchase.error?.message ?? '未知错误'}',
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);
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break;
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case PurchaseStatus.canceled:
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state = state.copyWith(isPurchasing: false, lastEvent: '支付已取消');
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break;
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case PurchaseStatus.pending:
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// Purchase awaiting approval/processing; keep the loading state.
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state = state.copyWith(isPurchasing: true);
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break;
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}
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}
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/// Debug-only unlock used so the app remains usable without App Store
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/// Connect configuration during development.
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Future<void> debugUnlock() async {
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await ref.read(appConfigProvider.notifier).debugUnlock();
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state = state.copyWith(lastEvent: '已通过开发模式解锁');
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}
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void clearEvent() {
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state = state.copyWith(lastEvent: null, errorMessage: null);
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}
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}
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@visibleForTesting
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IapState iapStateForTest({
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ProductDetails? product,
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bool isLoading = false,
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bool isPurchasing = false,
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String? errorMessage,
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bool productsAvailable = false,
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String? lastEvent,
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}) {
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return IapState(
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product: product,
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isLoading: isLoading,
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isPurchasing: isPurchasing,
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errorMessage: errorMessage,
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productsAvailable: productsAvailable,
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lastEvent: lastEvent,
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);
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}
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@@ -0,0 +1,156 @@
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import 'package:flutter/foundation.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter_riverpod/flutter_riverpod.dart';
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import 'package:arcx/app/app_theme.dart';
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import 'package:arcx/features/iap/application/iap_controller.dart';
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class IapUnlockDialog extends ConsumerWidget {
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const IapUnlockDialog({super.key});
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@override
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Widget build(BuildContext context, WidgetRef ref) {
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final iap = ref.watch(iapControllerProvider);
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final product = iap.product;
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ref.listen(iapControllerProvider, (prev, next) {
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if (next.lastEvent != null) {
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(content: Text(next.lastEvent!)),
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);
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if (next.lastEvent!.contains('解锁') ||
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next.lastEvent!.contains('恢复')) {
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Navigator.of(context).pop();
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}
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} else if (next.errorMessage != null) {
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(content: Text(next.errorMessage!)),
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);
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}
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});
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return AlertDialog(
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title: const Text('解锁记分本'),
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content: SingleChildScrollView(
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child: Column(
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mainAxisSize: MainAxisSize.min,
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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const Text(
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'免费试用次数已用完。购买后即可永久解锁无限记分权益，无需联网即可使用。',
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style: TextStyle(fontSize: 14),
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),
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const SizedBox(height: 16),
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_PriceRow(
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title: product?.title ?? '记分本永久解锁',
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price: iap.productsAvailable && product != null
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? product.price
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: '—',
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),
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const SizedBox(height: 8),
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_FeatureItem(text: '无限次记分训练'),
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_FeatureItem(text: '本地永久保存训练数据'),
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_FeatureItem(text: '一次购买，永久使用'),
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if (iap.isLoading) ...[
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const SizedBox(height: 12),
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const Center(child: CircularProgressIndicator()),
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],
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],
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),
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),
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actions: [
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TextButton(
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onPressed: iap.isPurchasing
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? null
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: () => Navigator.of(context).pop(),
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child: const Text('暂不解锁'),
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),
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TextButton(
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onPressed: iap.isPurchasing ? null : () => ref.read(iapControllerProvider.notifier).restore(),
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child: const Text('恢复购买'),
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),
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FilledButton(
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onPressed: iap.isPurchasing || iap.isLoading
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? null
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: () => _unlock(context, ref, iap),
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child: iap.isPurchasing
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? const SizedBox(
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width: 18,
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height: 18,
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child: CircularProgressIndicator(strokeWidth: 2, color: Colors.white),
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)
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: const Text('立即解锁'),
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),
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],
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);
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}
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Future<void> _unlock(
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BuildContext context,
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WidgetRef ref,
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IapState iap,
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) async {
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// In debug builds with no App Store product configured, fall back to a
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// dev unlock so the app remains usable for testing.
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if (kDebugMode && !iap.productsAvailable) {
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await ref.read(iapControllerProvider.notifier).debugUnlock();
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if (context.mounted) Navigator.of(context).pop();
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return;
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}
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await ref.read(iapControllerProvider.notifier).buy();
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}
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}
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class _PriceRow extends StatelessWidget {
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const _PriceRow({required this.title, required this.price});
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final String title;
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final String price;
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@override
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Widget build(BuildContext context) {
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return Container(
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padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 10),
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decoration: BoxDecoration(
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color: AppTheme.surfaceMuted,
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borderRadius: BorderRadius.circular(8),
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),
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child: Row(
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children: [
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Expanded(
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child: Text(
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title,
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style: const TextStyle(fontWeight: FontWeight.w600),
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),
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),
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Text(
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price,
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style: const TextStyle(
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fontSize: 18,
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fontWeight: FontWeight.w700,
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color: AppTheme.primary,
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),
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),
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],
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),
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);
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}
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}
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class _FeatureItem extends StatelessWidget {
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const _FeatureItem({required this.text});
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final String text;
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@override
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Widget build(BuildContext context) {
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return Padding(
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padding: const EdgeInsets.only(top: 8),
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child: Row(
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children: [
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const Icon(Icons.check_circle, color: AppTheme.primary, size: 18),
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const SizedBox(width: 8),
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Text(text, style: const TextStyle(fontSize: 13)),
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],
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),
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);
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}
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}
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