Initial commit: 风影 OA 全栈源码（API/Web/Flutter/IM）

含 Phase 1.1 IM seq 排序、断线重连、多端已读同步与微信式语音转文字 UI。排除 node_modules、构建产物、安装包与 .env 密钥。 Co-authored-by: Cursor <cursoragent@cursor.com>
2026-09-02 10:04:03 +00:00
commit 76f266645d
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+import 'package:shared_preferences/shared_preferences.dart';
+
+/// 本地记录各会话已同步到的最大 seq，断线重连后用于 gap fill。
+class ImSeqStore {
+  ImSeqStore._();
+  static SharedPreferences? _p;
+
+  static Future<void> ensure() async {
+    _p ??= await SharedPreferences.getInstance();
+  }
+
+  static Future<int> lastSeq(String conversationId) async {
+    if (conversationId.isEmpty) return 0;
+    await ensure();
+    return _p?.getInt('im.seq.$conversationId') ?? 0;
+  }
+
+  static Future<void> setLastSeq(String conversationId, int seq) async {
+    if (conversationId.isEmpty || seq <= 0) return;
+    await ensure();
+    final prev = _p?.getInt('im.seq.$conversationId') ?? 0;
+    if (seq > prev) await _p!.setInt('im.seq.$conversationId', seq);
+  }
+
+  static Future<void> applyItems(String conversationId, Iterable<Map<String, dynamic>> items) async {
+    var max = 0;
+    for (final e in items) {
+      final s = (e['seq'] as num?)?.toInt() ?? 0;
+      if (s > max) max = s;
+    }
+    if (max > 0) await setLastSeq(conversationId, max);
+  }
+}