feat(social): standard NIP-56 reporting — ReportTransport in commons_core, report sheet on offers and chats, local hide + optional block

packages/commons_core/test/social/nostr_report_transport_test.dart

@@ -0,0 +1,85 @@
+import 'dart:typed_data';
+
+import 'package:commons_core/commons_core.dart';
+import 'package:nostr/nostr.dart';
+import 'package:test/test.dart';
+
+import '../support/mini_relay.dart';
+
+/// Reports are standard NIP-56 events (kind 1984): a `p` tag naming the
+/// reported key (with the report type), optionally an `e` tag naming the
+/// offending event, and free text in the content. Standard on purpose — any
+/// Nostr relay or moderation tool understands them.
+void main() {
+  late MiniRelay relay;
+  setUp(() async => relay = await MiniRelay.start());
+  tearDown(() async => relay.stop());
+
+  Future<NostrIdentity> idFor(int fill) => NostrKeyDerivation.deriveFromSeed(
+        Uint8List(32)..fillRange(0, 32, fill),
+      );
+
+  test('reporting a person publishes a kind-1984 event with the typed p tag',
+      () async {
+    final alice = await idFor(1);
+    final conn = await NostrConnection.connect(relay.url, identity: alice);
+    final reports = NostrReportTransport(conn);
+
+    await reports.report(
+      subjectPubkey: 'ab' * 32,
+      reason: ReportReason.spam,
+      details: 'floods the market with fake offers',
+    );
+
+    final stored = await conn
+        .reqOnce(Filter(kinds: const [NostrReportTransport.kindReport]));
+    expect(stored, hasLength(1));
+    final event = stored.single;
+    expect(event.pubkey, alice.publicKeyHex);
+    expect(event.content, 'floods the market with fake offers');
+    expect(event.tags, anyElement(equals(['p', 'ab' * 32, 'spam'])));
+    await reports.close();
+  });
+
+  test('reporting an offending event adds the typed e tag too', () async {
+    final alice = await idFor(1);
+    final conn = await NostrConnection.connect(relay.url, identity: alice);
+    final reports = NostrReportTransport(conn);
+
+    await reports.report(
+      subjectPubkey: 'cd' * 32,
+      eventId: 'ef' * 32,
+      reason: ReportReason.illegal,
+    );
+
+    final stored = await conn
+        .reqOnce(Filter(kinds: const [NostrReportTransport.kindReport]));
+    final event = stored.single;
+    expect(event.tags, anyElement(equals(['e', 'ef' * 32, 'illegal'])));
+    expect(event.tags, anyElement(equals(['p', 'cd' * 32, 'illegal'])));
+    expect(event.content, isEmpty);
+    await reports.close();
+  });
+
+  test('reporting addressable content (an offer) adds the typed a tag',
+      () async {
+    final alice = await idFor(1);
+    final conn = await NostrConnection.connect(relay.url, identity: alice);
+    final reports = NostrReportTransport(conn);
+    final address = '30402:${'cd' * 32}:tomate-1';
+
+    await reports.report(
+      subjectPubkey: 'cd' * 32,
+      eventAddress: address,
+      reason: ReportReason.spam,
+    );
+
+    final stored = await conn
+        .reqOnce(Filter(kinds: const [NostrReportTransport.kindReport]));
+    expect(
+      stored.single.tags,
+      anyElement(equals(['a', address, 'spam'])),
+    );
+    await reports.close();
+  });
+}