feat: send personal player notifications

tests/GmRelay.Bot.Tests/Domain/SessionNotificationModeTests.cs

@@ -0,0 +1,16 @@
+using GmRelay.Shared.Domain;
+
+namespace GmRelay.Bot.Tests.Domain;
+
+public sealed class SessionNotificationModeTests
+{
+    [Theory]
+    [InlineData(SessionNotificationMode.GroupAndDirect, true)]
+    [InlineData(SessionNotificationMode.GroupOnly, false)]
+    public void ShouldSendDirectMessages_ReturnsExpectedDecision(
+        SessionNotificationMode mode,
+        bool expected)
+    {
+        Assert.Equal(expected, mode.ShouldSendDirectMessages());
+    }
+}

tests/GmRelay.Bot.Tests/Web/AuthorizedSessionServiceTests.cs

@@ -1,4 +1,5 @@
 using GmRelay.Web.Services;
+using GmRelay.Shared.Domain;
 
 namespace GmRelay.Bot.Tests.Web;
 
@@ -210,6 +211,53 @@ public sealed class AuthorizedSessionServiceTests
         Assert.Equal("https://example.test/b", store.LastUpdatedBatchJoinLink);
     }
 
+    [Fact]
+    public async Task UpdateBatchNotificationModeForGmAsync_Throws_WhenBatchBelongsToAnotherGm()
+    {
+        var batchId = Guid.NewGuid();
+        var groupId = Guid.NewGuid();
+        var store = new FakeSessionStore(
+            groups:
+            [
+                new(groupId, 42, "Alpha", 2002L)
+            ],
+            sessions:
+            [
+                new(Guid.NewGuid(), groupId, "Session A", DateTime.UtcNow, "Planned", "https://example.test/a", batchId, 10, 42, 4, 1, 0)
+            ]);
+        var service = new AuthorizedSessionService(store);
+
+        var action = () => service.UpdateBatchNotificationModeForGmAsync(batchId, 1001L, SessionNotificationMode.GroupOnly);
+
+        await Assert.ThrowsAsync<SessionAccessDeniedException>(action);
+        Assert.False(store.UpdateBatchNotificationModeCalled);
+    }
+
+    [Fact]
+    public async Task UpdateBatchNotificationModeForGmAsync_UpdatesOwnedBatch()
+    {
+        var gmId = 1001L;
+        var groupId = Guid.NewGuid();
+        var batchId = Guid.NewGuid();
+        var store = new FakeSessionStore(
+            groups:
+            [
+                new(groupId, 42, "Alpha", gmId)
+            ],
+            sessions:
+            [
+                new(Guid.NewGuid(), groupId, "Session A", DateTime.UtcNow, "Planned", "https://example.test/a", batchId, 10, 42, 4, 1, 0)
+            ]);
+        var service = new AuthorizedSessionService(store);
+
+        await service.UpdateBatchNotificationModeForGmAsync(batchId, gmId, SessionNotificationMode.GroupOnly);
+
+        Assert.True(store.UpdateBatchNotificationModeCalled);
+        Assert.Equal(batchId, store.LastUpdatedNotificationBatchId);
+        Assert.Equal(groupId, store.LastUpdatedNotificationGroupId);
+        Assert.Equal(SessionNotificationMode.GroupOnly, store.LastUpdatedNotificationMode);
+    }
+
     [Fact]
     public async Task RescheduleBatchForGmAsync_RejectsNonPositiveInterval()
     {
@@ -295,6 +343,7 @@ public sealed class AuthorizedSessionServiceTests
         public bool UpdateCalled { get; private set; }
         public bool PromoteCalled { get; private set; }
         public bool UpdateBatchDetailsCalled { get; private set; }
+        public bool UpdateBatchNotificationModeCalled { get; private set; }
         public bool RescheduleBatchCalled { get; private set; }
         public bool CloneBatchCalled { get; private set; }
         public Guid? LastUpdatedSessionId { get; private set; }
@@ -309,6 +358,9 @@ public sealed class AuthorizedSessionServiceTests
         public Guid? LastUpdatedBatchGroupId { get; private set; }
         public string? LastUpdatedBatchTitle { get; private set; }
         public string? LastUpdatedBatchJoinLink { get; private set; }
+        public Guid? LastUpdatedNotificationBatchId { get; private set; }
+        public Guid? LastUpdatedNotificationGroupId { get; private set; }
+        public SessionNotificationMode? LastUpdatedNotificationMode { get; private set; }
         public Guid? LastRescheduledBatchId { get; private set; }
         public Guid? LastRescheduledBatchGroupId { get; private set; }
         public DateTime? LastRescheduledFirstScheduledAt { get; private set; }
@@ -388,6 +440,15 @@ public sealed class AuthorizedSessionServiceTests
             return Task.CompletedTask;
         }
 
+        public Task UpdateBatchNotificationModeAsync(Guid batchId, Guid groupId, SessionNotificationMode notificationMode)
+        {
+            UpdateBatchNotificationModeCalled = true;
+            LastUpdatedNotificationBatchId = batchId;
+            LastUpdatedNotificationGroupId = groupId;
+            LastUpdatedNotificationMode = notificationMode;
+            return Task.CompletedTask;
+        }
+
         public Task RescheduleBatchAsync(Guid batchId, Guid groupId, DateTime firstScheduledAt, int intervalDays)
         {
             RescheduleBatchCalled = true;