feat: add campaign templates and recurring schedules

tests/GmRelay.Bot.Tests/Features/Sessions/CreateSession/NewSessionCommandParserTests.cs

@@ -33,6 +33,32 @@ public sealed class NewSessionCommandParserTests
         Assert.Empty(result.InvalidTimeInputs);
     }
 
+    [Fact]
+    public void Parse_ShouldExpandRecurringSchedule_WhenRepeatCountAndIntervalProvided()
+    {
+        var nowUtc = new DateTimeOffset(2026, 4, 23, 12, 0, 0, TimeSpan.Zero);
+        var text = """
+            /newsession
+            Название: Kingmaker
+            Время: 30.04.2026 19:30
+            Игр: 4
+            Интервал: 14
+            Ссылка: https://example.test/kingmaker
+            """;
+
+        var result = NewSessionCommandParser.Parse(text, nowUtc);
+
+        Assert.True(result.IsValid);
+        Assert.Equal(
+            [
+                new DateTimeOffset(2026, 4, 30, 16, 30, 0, TimeSpan.Zero),
+                new DateTimeOffset(2026, 5, 14, 16, 30, 0, TimeSpan.Zero),
+                new DateTimeOffset(2026, 5, 28, 16, 30, 0, TimeSpan.Zero),
+                new DateTimeOffset(2026, 6, 11, 16, 30, 0, TimeSpan.Zero)
+            ],
+            result.ScheduledTimes);
+    }
+
     [Fact]
     public void Parse_ShouldCollectPastAndInvalidTimes()
     {

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

@@ -460,13 +460,153 @@ public sealed class AuthorizedSessionServiceTests
         Assert.Equal(BatchCloneInterval.NextWeek, store.LastCloneInterval);
     }
 
+    [Fact]
+    public async Task CreateCampaignTemplateForGmAsync_CreatesTemplate_WhenGroupBelongsToGm()
+    {
+        var gmId = 1001L;
+        var groupId = Guid.NewGuid();
+        var store = new FakeSessionStore(
+            groups:
+            [
+                new(groupId, 42, "Alpha", gmId)
+            ]);
+        var service = new AuthorizedSessionService(store);
+
+        await service.CreateCampaignTemplateForGmAsync(
+            groupId,
+            gmId,
+            new CreateCampaignTemplateRequest(
+                "  Weekly arc  ",
+                "  Kingmaker  ",
+                "  https://example.test/kingmaker  ",
+                SessionCount: 6,
+                IntervalDays: 7,
+                MaxPlayers: 5,
+                SessionNotificationMode.GroupOnly));
+
+        Assert.True(store.CreateCampaignTemplateCalled);
+        Assert.Equal(groupId, store.LastCreatedCampaignTemplateGroupId);
+        Assert.Equal("Weekly arc", store.LastCreatedCampaignTemplateRequest?.Name);
+        Assert.Equal("Kingmaker", store.LastCreatedCampaignTemplateRequest?.Title);
+        Assert.Equal("https://example.test/kingmaker", store.LastCreatedCampaignTemplateRequest?.JoinLink);
+        Assert.Equal(6, store.LastCreatedCampaignTemplateRequest?.SessionCount);
+        Assert.Equal(7, store.LastCreatedCampaignTemplateRequest?.IntervalDays);
+        Assert.Equal(5, store.LastCreatedCampaignTemplateRequest?.MaxPlayers);
+        Assert.Equal(SessionNotificationMode.GroupOnly, store.LastCreatedCampaignTemplateRequest?.NotificationMode);
+    }
+
+    [Fact]
+    public async Task CreateCampaignTemplateForGmAsync_AllowsNoSeatLimit()
+    {
+        var gmId = 1001L;
+        var groupId = Guid.NewGuid();
+        var store = new FakeSessionStore(
+            groups:
+            [
+                new(groupId, 42, "Alpha", gmId)
+            ]);
+        var service = new AuthorizedSessionService(store);
+
+        await service.CreateCampaignTemplateForGmAsync(
+            groupId,
+            gmId,
+            new CreateCampaignTemplateRequest(
+                "Open table",
+                "West Marches",
+                "https://example.test/west",
+                8,
+                7,
+                null,
+                SessionNotificationMode.GroupAndDirect));
+
+        Assert.True(store.CreateCampaignTemplateCalled);
+        Assert.Null(store.LastCreatedCampaignTemplateRequest?.MaxPlayers);
+    }
+
+    [Fact]
+    public async Task CreateCampaignTemplateForGmAsync_Throws_WhenGroupBelongsToAnotherGm()
+    {
+        var groupId = Guid.NewGuid();
+        var store = new FakeSessionStore(
+            groups:
+            [
+                new(groupId, 42, "Alpha", 2002L)
+            ]);
+        var service = new AuthorizedSessionService(store);
+
+        var action = () => service.CreateCampaignTemplateForGmAsync(
+            groupId,
+            1001L,
+            new CreateCampaignTemplateRequest(
+                "Weekly arc",
+                "Kingmaker",
+                "https://example.test/kingmaker",
+                SessionCount: 6,
+                IntervalDays: 7,
+                MaxPlayers: 5,
+                SessionNotificationMode.GroupOnly));
+
+        await Assert.ThrowsAsync<SessionAccessDeniedException>(action);
+        Assert.False(store.CreateCampaignTemplateCalled);
+    }
+
+    [Fact]
+    public async Task CreateBatchFromCampaignTemplateForGmAsync_CreatesBatch_WhenTemplateGroupBelongsToGm()
+    {
+        var gmId = 1001L;
+        var groupId = Guid.NewGuid();
+        var templateId = Guid.NewGuid();
+        var firstScheduledAt = DateTime.UtcNow.AddDays(3);
+        var store = new FakeSessionStore(
+            groups:
+            [
+                new(groupId, 42, "Alpha", gmId)
+            ],
+            templates:
+            [
+                new(templateId, groupId, "Weekly arc", "Kingmaker", "https://example.test/kingmaker", 6, 7, 5, SessionNotificationModeExtensions.GroupOnlyValue, DateTime.UtcNow, DateTime.UtcNow)
+            ]);
+        var service = new AuthorizedSessionService(store);
+
+        await service.CreateBatchFromCampaignTemplateForGmAsync(templateId, gmId, firstScheduledAt);
+
+        Assert.True(store.CreateBatchFromTemplateCalled);
+        Assert.Equal(templateId, store.LastCreatedBatchTemplateId);
+        Assert.Equal(groupId, store.LastCreatedBatchTemplateGroupId);
+        Assert.Equal(firstScheduledAt, store.LastCreatedBatchFirstScheduledAt);
+    }
+
+    [Fact]
+    public async Task CreateBatchFromCampaignTemplateForGmAsync_Throws_WhenTemplateGroupBelongsToAnotherGm()
+    {
+        var groupId = Guid.NewGuid();
+        var templateId = Guid.NewGuid();
+        var store = new FakeSessionStore(
+            groups:
+            [
+                new(groupId, 42, "Alpha", 2002L)
+            ],
+            templates:
+            [
+                new(templateId, groupId, "Weekly arc", "Kingmaker", "https://example.test/kingmaker", 6, 7, 5, SessionNotificationModeExtensions.GroupOnlyValue, DateTime.UtcNow, DateTime.UtcNow)
+            ]);
+        var service = new AuthorizedSessionService(store);
+
+        var action = () => service.CreateBatchFromCampaignTemplateForGmAsync(templateId, 1001L, DateTime.UtcNow.AddDays(3));
+
+        await Assert.ThrowsAsync<SessionAccessDeniedException>(action);
+        Assert.False(store.CreateBatchFromTemplateCalled);
+    }
+
     private sealed class FakeSessionStore(
         IEnumerable<WebGameGroup>? groups = null,
         IEnumerable<WebSession>? sessions = null,
-        IEnumerable<FakeGroupManager>? managers = null) : ISessionStore
+        IEnumerable<FakeGroupManager>? managers = null,
+        IEnumerable<WebCampaignTemplate>? templates = null) : ISessionStore
     {
         private readonly Dictionary<Guid, WebGameGroup> groupsById = groups?.ToDictionary(group => group.Id) ?? [];
         private readonly Dictionary<Guid, WebSession> sessionsById = sessions?.ToDictionary(session => session.Id) ?? [];
+        private readonly Dictionary<Guid, WebCampaignTemplate> templatesById = templates?.ToDictionary(template => template.Id) ?? [];
         private readonly List<FakeGroupManager> managers = managers?.ToList() ?? [];
 
         public bool UpdateCalled { get; private set; }
@@ -475,6 +615,9 @@ public sealed class AuthorizedSessionServiceTests
         public bool UpdateBatchNotificationModeCalled { get; private set; }
         public bool RescheduleBatchCalled { get; private set; }
         public bool CloneBatchCalled { get; private set; }
+        public bool CreateCampaignTemplateCalled { get; private set; }
+        public bool DeleteCampaignTemplateCalled { get; private set; }
+        public bool CreateBatchFromTemplateCalled { get; private set; }
         public bool AddCoGmCalled { get; private set; }
         public bool RemoveCoGmCalled { get; private set; }
         public Guid? LastUpdatedSessionId { get; private set; }
@@ -499,6 +642,13 @@ public sealed class AuthorizedSessionServiceTests
         public Guid? LastClonedBatchId { get; private set; }
         public Guid? LastClonedBatchGroupId { get; private set; }
         public BatchCloneInterval? LastCloneInterval { get; private set; }
+        public Guid? LastCreatedCampaignTemplateGroupId { get; private set; }
+        public CreateCampaignTemplateRequest? LastCreatedCampaignTemplateRequest { get; private set; }
+        public Guid? LastDeletedCampaignTemplateId { get; private set; }
+        public Guid? LastDeletedCampaignTemplateGroupId { get; private set; }
+        public Guid? LastCreatedBatchTemplateId { get; private set; }
+        public Guid? LastCreatedBatchTemplateGroupId { get; private set; }
+        public DateTime? LastCreatedBatchFirstScheduledAt { get; private set; }
         public Guid? LastAddedCoGmGroupId { get; private set; }
         public long? LastAddedCoGmTelegramId { get; private set; }
         public string? LastAddedCoGmDisplayName { get; private set; }
@@ -642,6 +792,66 @@ public sealed class AuthorizedSessionServiceTests
                 1));
         }
 
+        public Task<List<WebCampaignTemplate>> GetCampaignTemplatesAsync(Guid groupId) =>
+            Task.FromResult(templatesById.Values.Where(template => template.GroupId == groupId).ToList());
+
+        public Task<WebCampaignTemplate?> GetCampaignTemplateAsync(Guid templateId)
+        {
+            templatesById.TryGetValue(templateId, out var template);
+            return Task.FromResult(template);
+        }
+
+        public Task<WebCampaignTemplate> CreateCampaignTemplateAsync(Guid groupId, CreateCampaignTemplateRequest request)
+        {
+            CreateCampaignTemplateCalled = true;
+            LastCreatedCampaignTemplateGroupId = groupId;
+            LastCreatedCampaignTemplateRequest = request;
+
+            var template = new WebCampaignTemplate(
+                Guid.NewGuid(),
+                groupId,
+                request.Name,
+                request.Title,
+                request.JoinLink,
+                request.SessionCount,
+                request.IntervalDays,
+                request.MaxPlayers,
+                request.NotificationMode.ToDatabaseValue(),
+                DateTime.UtcNow,
+                DateTime.UtcNow);
+
+            templatesById[template.Id] = template;
+            return Task.FromResult(template);
+        }
+
+        public Task DeleteCampaignTemplateAsync(Guid templateId, Guid groupId)
+        {
+            DeleteCampaignTemplateCalled = true;
+            LastDeletedCampaignTemplateId = templateId;
+            LastDeletedCampaignTemplateGroupId = groupId;
+            templatesById.Remove(templateId);
+            return Task.CompletedTask;
+        }
+
+        public Task<WebSessionBatch> CreateBatchFromTemplateAsync(Guid templateId, Guid groupId, DateTime firstScheduledAt)
+        {
+            CreateBatchFromTemplateCalled = true;
+            LastCreatedBatchTemplateId = templateId;
+            LastCreatedBatchTemplateGroupId = groupId;
+            LastCreatedBatchFirstScheduledAt = firstScheduledAt;
+
+            var template = templatesById[templateId];
+            return Task.FromResult(new WebSessionBatch(
+                Guid.NewGuid(),
+                groupId,
+                template.Title,
+                template.JoinLink,
+                firstScheduledAt,
+                firstScheduledAt.AddDays(template.IntervalDays * (template.SessionCount - 1)),
+                template.SessionCount,
+                template.NotificationMode));
+        }
+
         public Task AddGroupCoGmAsync(Guid groupId, long ownerTelegramId, long coGmTelegramId, string displayName, string? telegramUsername)
         {
             AddCoGmCalled = true;

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

@@ -37,6 +37,35 @@ public sealed class BatchSchedulePlannerTests
         Assert.Throws<ArgumentOutOfRangeException>(action);
     }
 
+    [Fact]
+    public void BuildRecurringSchedule_CreatesFixedIntervalScheduleFromFirstDate()
+    {
+        var firstScheduledAt = new DateTime(2026, 5, 4, 16, 0, 0, DateTimeKind.Utc);
+
+        var result = BatchSchedulePlanner.BuildRecurringSchedule(firstScheduledAt, sessionCount: 3, intervalDays: 14);
+
+        Assert.Equal(
+            [
+                firstScheduledAt,
+                firstScheduledAt.AddDays(14),
+                firstScheduledAt.AddDays(28)
+            ],
+            result);
+    }
+
+    [Theory]
+    [InlineData(0, 7)]
+    [InlineData(53, 7)]
+    [InlineData(3, 0)]
+    public void BuildRecurringSchedule_RejectsInvalidTemplateShape(int sessionCount, int intervalDays)
+    {
+        var firstScheduledAt = new DateTime(2026, 5, 4, 16, 0, 0, DateTimeKind.Utc);
+
+        var action = () => BatchSchedulePlanner.BuildRecurringSchedule(firstScheduledAt, sessionCount, intervalDays);
+
+        Assert.Throws<ArgumentOutOfRangeException>(action);
+    }
+
     [Theory]
     [InlineData(BatchCloneInterval.NextWeek, 2026, 5, 8)]
     [InlineData(BatchCloneInterval.NextMonth, 2026, 6, 1)]