refactored sync & bangs

2024-06-12 08:34:48 +02:00
parent ff40d57ce7
commit b1e2b65a0c
22 changed files with 1023 additions and 327 deletions
@@ -0,0 +1,85 @@
+import 'package:bang_navigator/features/bangs/data/database/database.dart';
+import 'package:bang_navigator/features/bangs/data/models/bang.dart';
+import 'package:drift/drift.dart';
+
+part 'sync.g.dart';
+
+@DriftAccessor()
+class SyncDao extends DatabaseAccessor<BangDatabase> with _$SyncDaoMixin {
+  SyncDao(super.db);
+
+  SingleOrNullSelectable<DateTime?> lastSyncOfGroup(BangGroup group) {
+    final query = selectOnly(db.bangSync)
+      ..addColumns([db.bangSync.lastSync])
+      ..where(db.bangSync.group.equalsValue(group));
+
+    return query.map((row) => row.read(db.bangSync.lastSync));
+  }
+
+  Future<void> upsertLastSyncOfGroup(BangGroup group, DateTime lastSync) {
+    return db.bangSync.insertOne(
+      BangSyncCompanion.insert(
+        group: Value(group),
+        lastSync: lastSync,
+      ),
+      onConflict: DoUpdate(
+        (old) => BangSyncCompanion.custom(lastSync: Variable(lastSync)),
+      ),
+    );
+  }
+
+  Future<void> insertBangs(Iterable<Bang> bangs) {
+    return db.bang.insertAll(bangs);
+  }
+
+  Future<void> replaceBangs(Iterable<Bang> bangs) {
+    return batch(
+      (batch) {
+        batch.replaceAll(db.bang, bangs);
+      },
+    );
+  }
+
+  Future<int> deleteBangs(Iterable<String> triggers) {
+    final statement = delete(db.bang)..where((t) => t.trigger.isIn(triggers));
+    return statement.go();
+  }
+
+  Future<void> syncBangs({
+    required BangGroup group,
+    required Iterable<Bang> remoteBangs,
+    required DateTime syncTime,
+  }) async {
+    final remoteBangMap =
+        Map.fromEntries(remoteBangs.map((e) => MapEntry(e.trigger, e)));
+    final localBangMap =
+        await db.bangDao.getBangList(groups: [group]).get().then(
+              (bangs) =>
+                  Map.fromEntries(bangs.map((e) => MapEntry(e.trigger, e))),
+            );
+
+    final remoteBangTriggers = remoteBangMap.keys.toSet();
+    final localBangTriggers = localBangMap.keys.toSet();
+
+    final removedBangs = localBangTriggers.difference(remoteBangTriggers);
+    final addedBangs = remoteBangTriggers.difference(localBangTriggers).map(
+          (e) => remoteBangMap[e]!,
+        );
+
+    final changedBangs = remoteBangTriggers
+        .intersection(localBangTriggers)
+        .where((e) => remoteBangMap[e] != localBangMap[e])
+        .map(
+          (e) => remoteBangMap[e]!,
+        );
+
+    await db.transaction(
+      () async {
+        await deleteBangs(removedBangs);
+        await insertBangs(addedBangs);
+        await replaceBangs(changedBangs);
+        await upsertLastSyncOfGroup(group, syncTime);
+      },
+    );
+  }
+}