Group contacts by last seen

2026-08-11 16:30:28 +00:00 · 2026-03-10 08:54:55 +01:00
parent 07b675dec6
commit 025bd737e7
11 changed files with 902 additions and 110 deletions
--- a/test/utils/contact_grouping_test.dart
+++ b/test/utils/contact_grouping_test.dart
@@ -0,0 +1,120 @@
+import 'dart:typed_data';
+
+import 'package:flutter_test/flutter_test.dart';
+import 'package:meshcore_sar_app/models/contact.dart';
+import 'package:meshcore_sar_app/utils/contact_grouping.dart';
+
+void main() {
+  Contact buildContact({
+    required int seed,
+    required String name,
+    required DateTime lastSeen,
+  }) {
+    return Contact(
+      publicKey: Uint8List.fromList(
+        List<int>.generate(32, (index) => (seed + index) % 255),
+      ),
+      type: ContactType.chat,
+      flags: 0,
+      outPathLen: 0,
+      outPath: Uint8List(64),
+      advName: name,
+      lastAdvert: lastSeen.millisecondsSinceEpoch ~/ 1000,
+      advLat: 0,
+      advLon: 0,
+      lastMod: lastSeen.millisecondsSinceEpoch ~/ 1000,
+    );
+  }
+
+  group('ContactGrouping.buildItems', () {
+    test(
+      'groups prefixed contacts only when at least four share the prefix',
+      () {
+        final now = DateTime(2026, 3, 10, 12);
+        final items = ContactGrouping.buildItems([
+          buildContact(seed: 1, name: 'SI-1', lastSeen: now),
+          buildContact(
+            seed: 2,
+            name: 'SI-2',
+            lastSeen: now.subtract(const Duration(minutes: 1)),
+          ),
+          buildContact(
+            seed: 3,
+            name: 'SI-3',
+            lastSeen: now.subtract(const Duration(minutes: 2)),
+          ),
+          buildContact(
+            seed: 4,
+            name: 'SI-4',
+            lastSeen: now.subtract(const Duration(minutes: 3)),
+          ),
+          buildContact(
+            seed: 5,
+            name: 'OTHER',
+            lastSeen: now.subtract(const Duration(minutes: 4)),
+          ),
+        ]);
+
+        expect(items, hasLength(2));
+        expect(items.first.isGroup, isTrue);
+        expect(items.first.group!.label, 'SI-');
+        expect(
+          items.first.group!.contacts.map((contact) => contact.displayName),
+          ['SI-1', 'SI-2', 'SI-3', 'SI-4'],
+        );
+        expect(items.last.contact!.displayName, 'OTHER');
+      },
+    );
+
+    test('does not group when only three contacts share a prefix', () {
+      final now = DateTime(2026, 3, 10, 12);
+      final items = ContactGrouping.buildItems([
+        buildContact(seed: 1, name: 'SI-1', lastSeen: now),
+        buildContact(
+          seed: 2,
+          name: 'SI-2',
+          lastSeen: now.subtract(const Duration(minutes: 1)),
+        ),
+        buildContact(
+          seed: 3,
+          name: 'SI-3',
+          lastSeen: now.subtract(const Duration(minutes: 2)),
+        ),
+      ]);
+
+      expect(items, hasLength(3));
+      expect(items.every((item) => !item.isGroup), isTrue);
+    });
+
+    test('orders groups and ungrouped contacts by latest last seen', () {
+      final now = DateTime(2026, 3, 10, 12);
+      final items = ContactGrouping.buildItems([
+        buildContact(
+          seed: 1,
+          name: 'Lone',
+          lastSeen: now.subtract(const Duration(minutes: 1)),
+        ),
+        buildContact(seed: 2, name: 'SI-1', lastSeen: now),
+        buildContact(
+          seed: 3,
+          name: 'SI-2',
+          lastSeen: now.subtract(const Duration(minutes: 2)),
+        ),
+        buildContact(
+          seed: 4,
+          name: 'SI-3',
+          lastSeen: now.subtract(const Duration(minutes: 3)),
+        ),
+        buildContact(
+          seed: 5,
+          name: 'SI-4',
+          lastSeen: now.subtract(const Duration(minutes: 4)),
+        ),
+      ]);
+
+      expect(items, hasLength(2));
+      expect(items.first.isGroup, isTrue);
+      expect(items.last.contact!.displayName, 'Lone');
+    });
+  });
+}