✨ Join channel hint

🗃️ Realm local db

lib/providers/sn_realm.dart

@@ -1,13 +1,20 @@
+import 'dart:convert';
+
+import 'package:drift/drift.dart';
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
+import 'package:surface/database/database.dart';
+import 'package:surface/providers/database.dart';
 import 'package:surface/providers/sn_network.dart';
 import 'package:surface/types/realm.dart';
 
 class SnRealmProvider {
   late final SnNetworkProvider _sn;
+  late final DatabaseProvider _dt;
 
   SnRealmProvider(BuildContext context) {
     _sn = context.read<SnNetworkProvider>();
+    _dt = context.read<DatabaseProvider>();
   }
 
   final Map<String, SnRealm> _cache = {};
@@ -28,6 +35,7 @@ class SnRealmProvider {
       _cache[realm.alias] = realm;
       _cache[realm.id.toString()] = realm;
     }
+    _saveToLocal(out);
     return out;
   }
 
@@ -35,10 +43,43 @@ class SnRealmProvider {
     if (_cache.containsKey(aliasOrId.toString())) {
       return _cache[aliasOrId.toString()]!;
     }
+    final localResp = await (_dt.db.snLocalRealm.select()
+          ..where((e) =>
+              e.id.equals(aliasOrId is int ? aliasOrId : 0) |
+              e.alias.equals(aliasOrId.toString()))
+          ..where((e) => e.cacheExpiredAt.isBiggerThanValue(DateTime.now())))
+        .getSingleOrNull();
+    if (localResp != null) {
+      _cache[localResp.content.id.toString()] = localResp.content;
+      _cache[localResp.content.alias] = localResp.content;
+      return localResp.content;
+    }
     final resp = await _sn.client.get('/cgi/id/realms/$aliasOrId');
     final out = SnRealm.fromJson(resp.data);
     _cache[out.alias] = out;
     _cache[out.id.toString()] = out;
+    _saveToLocal([out]);
     return out;
   }
+
+  Future<void> _saveToLocal(Iterable<SnRealm> out) async {
+    for (final ele in out) {
+      await _dt.db.snLocalRealm.insertOne(
+        SnLocalRealmCompanion.insert(
+          id: Value(ele.id),
+          alias: ele.alias,
+          content: ele,
+          accountId: ele.accountId,
+          cacheExpiredAt: DateTime.now().add(const Duration(hours: 1)),
+        ),
+        onConflict: DoUpdate(
+          (_) => SnLocalRealmCompanion.custom(
+            content: Constant(jsonEncode(ele.toJson())),
+            cacheExpiredAt:
+                Constant(DateTime.now().add(const Duration(hours: 1))),
+          ),
+        ),
+      );
+    }
+  }
 }