fix：第一轮跑

2026-08-24 19:07:31 +08:00
1 parent e834ec7586
commit 33235f450b
@@ -0,0 +1,236 @@
+import 'dart:typed_data';
+
+import 'package:dio/dio.dart';
+import 'package:flutter/foundation.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:uuid/uuid.dart';
+
+import '../../../common/network/dio_provider.dart';
+
+/// 金值商城广告位的公共契约；商城是否展示完全由服务端配置决定。
+const mallSourceApp = 'jinzhi';
+
+class MallTabConfig {
+  const MallTabConfig({
+    required this.enabled,
+    required this.url,
+    this.title = '商城',
+    this.adId = '',
+    this.trackingId = '',
+    this.openMode = 'in_app',
+    this.badgeText = '',
+  });
+
+  const MallTabConfig.disabled() : this(enabled: false, url: '');
+
+  final bool enabled;
+  final String url;
+  final String title;
+  final String adId;
+  final String trackingId;
+  final String openMode;
+  final String badgeText;
+
+  bool get isVisible => enabled && initialUri != null;
+  bool get opensInApp => openMode == 'in_app';
+
+  Uri? get initialUri => attributedUri(clickId: '');
+
+  Uri? attributedUri({required String clickId, bool isDark = false}) {
+    final uri = Uri.tryParse(url.trim());
+    if (!_isAllowed(uri)) return null;
+    return uri!.replace(
+      queryParameters: {
+        ...uri.queryParameters,
+        'from': uri.queryParameters['from']?.trim().isNotEmpty == true
+            ? uri.queryParameters['from']!
+            : mallSourceApp,
+        'source_app': mallSourceApp,
+        'source_entry': 'mall_tab',
+        'placement': 'mall_tab',
+        'hook_type': 'mall_tab',
+        'target_app': 'mall',
+        if (adId.isNotEmpty) 'ad_id': adId,
+        if (trackingId.isNotEmpty) 'tracking_id': trackingId,
+        if (clickId.isNotEmpty) 'click_id': clickId,
+        if (clickId.isNotEmpty)
+          'ts': DateTime.now().millisecondsSinceEpoch.toString(),
+        'isNight': isDark ? '1' : '0',
+      },
+    );
+  }
+
+  static bool _isAllowed(Uri? uri) {
+    if (uri == null || uri.host.isEmpty) return false;
+    if (uri.scheme == 'https') return true;
+    return !kReleaseMode &&
+        uri.scheme == 'http' &&
+        const {'localhost', '127.0.0.1', '::1'}.contains(uri.host);
+  }
+}
+
+class MallTabConfigController extends StateNotifier<MallTabConfig> {
+  MallTabConfigController(this._dio) : super(const MallTabConfig.disabled()) {
+    refresh();
+  }
+
+  final Dio _dio;
+  Future<void>? _loading;
+
+  Future<MallTabConfig> ensureLoaded() async {
+    if (state.isVisible) return state;
+    await (_loading ??= refresh().whenComplete(() => _loading = null));
+    return state;
+  }
+
+  Future<void> refresh() async {
+    try {
+      final response = await _dio.get<List<int>>(
+        '/api/v1/ads',
+        queryParameters: const {'placement': 'mall_tab'},
+        options: protobufOptions(),
+      );
+      final reply = _ProtoMessage(response.data ?? const []).message(2);
+      final enabled = _ProtoMessage(response.data ?? const []).integer(1) != 0;
+      final trackedUrl = reply.string(14);
+      final h5Url = reply.string(9);
+      final url = _validUrl(trackedUrl) ?? _validUrl(h5Url);
+      if (!enabled || url == null) {
+        state = const MallTabConfig.disabled();
+        return;
+      }
+      state = MallTabConfig(
+        enabled: true,
+        url: url,
+        title: _nonEmpty(reply.string(4), '商城'),
+        adId: reply.string(1),
+        trackingId: reply.string(10),
+        openMode: _openMode(reply.integer(15)),
+        badgeText: reply.string(17).trim(),
+      );
+      await _report('ad_impression');
+    } catch (_) {
+      state = const MallTabConfig.disabled();
+    }
+  }
+
+  Future<String?> recordClick() async {
+    if (!state.isVisible) return null;
+    final clickId = const Uuid().v4();
+    try {
+      await _report('ad_click', clickId: clickId);
+    } catch (_) {
+      // 归因上报失败不能阻断商城入口。
+    }
+    return clickId;
+  }
+
+  Future<void> _report(String event, {String clickId = ''}) =>
+      _dio.post<List<int>>(
+        '/api/v1/ads/events',
+        data: _ProtoWriter()
+            .string(1, event)
+            .string(2, 'mall_tab')
+            .string(3, state.adId)
+            .string(4, state.trackingId)
+            .string(5, clickId)
+            .integer(6, DateTime.now().millisecondsSinceEpoch)
+            .toBytes(),
+        options: protobufOptions(),
+      );
+}
+
+final mallTabConfigProvider =
+    StateNotifierProvider<MallTabConfigController, MallTabConfig>(
+      (ref) => MallTabConfigController(ref.watch(dioProvider)),
+    );
+
+String _nonEmpty(String value, String fallback) =>
+    value.trim().isEmpty ? fallback : value.trim();
+
+String? _validUrl(String raw) {
+  final uri = Uri.tryParse(raw.trim());
+  return MallTabConfig._isAllowed(uri) ? uri.toString() : null;
+}
+
+String _openMode(int value) => switch (value) {
+  1 => 'native_app',
+  2 => 'in_app',
+  _ => 'external',
+};
+
+class _ProtoMessage {
+  _ProtoMessage(this._bytes);
+  final List<int> _bytes;
+
+  int integer(int wanted) =>
+      _fields()[wanted] is int ? _fields()[wanted]! as int : 0;
+  String string(int wanted) => _fields()[wanted] is List<int>
+      ? String.fromCharCodes(_fields()[wanted]! as List<int>)
+      : '';
+  _ProtoMessage message(int wanted) => _ProtoMessage(
+    _fields()[wanted] is List<int> ? _fields()[wanted]! as List<int> : const [],
+  );
+
+  Map<int, Object> _fields() {
+    final values = <int, Object>{};
+    var index = 0;
+    int readVarint() {
+      var value = 0;
+      var shift = 0;
+      while (index < _bytes.length && shift < 64) {
+        final byte = _bytes[index++];
+        value |= (byte & 127) << shift;
+        if (byte < 128) return value;
+        shift += 7;
+      }
+      throw const FormatException('Invalid protobuf');
+    }
+
+    while (index < _bytes.length) {
+      final key = readVarint();
+      final tag = key >> 3;
+      switch (key & 7) {
+        case 0:
+          values[tag] = readVarint();
+        case 2:
+          final length = readVarint();
+          final end = index + length;
+          if (end > _bytes.length) {
+            throw const FormatException('Invalid protobuf');
+          }
+          values[tag] = _bytes.sublist(index, end);
+          index = end;
+        default:
+          throw const FormatException('Unsupported protobuf');
+      }
+    }
+    return values;
+  }
+}
+
+class _ProtoWriter {
+  final _bytes = BytesBuilder(copy: false);
+  _ProtoWriter string(int tag, String value) {
+    final data = value.codeUnits;
+    _varint((tag << 3) | 2);
+    _varint(data.length);
+    _bytes.add(data);
+    return this;
+  }
+
+  _ProtoWriter integer(int tag, int value) {
+    _varint(tag << 3);
+    _varint(value);
+    return this;
+  }
+
+  Uint8List toBytes() => _bytes.toBytes();
+  void _varint(int value) {
+    while (value > 127) {
+      _bytes.addByte((value & 127) | 128);
+      value >>= 7;
+    }
+    _bytes.addByte(value);
+  }
+}