feat(platform): route scheduler notifications through platform messenger

src/GmRelay.DiscordBot/Infrastructure/Discord/DiscordPlatformMessenger.cs

@@ -1,21 +1,43 @@
+using System.Globalization;
+using System.Text;
 using GmRelay.DiscordBot.Rendering;
+using GmRelay.Shared.Domain;
 using GmRelay.Shared.Platform;
 using GmRelay.Shared.Rendering;
+using Microsoft.Extensions.Logging;
 using NetCord;
 using NetCord.Rest;
 
 namespace GmRelay.DiscordBot.Infrastructure.Discord;
 
-public sealed class DiscordPlatformMessenger(
-    RestClient restClient,
-    DiscordInteractionReplyCache interactionReplies) : IPlatformMessenger
+public sealed class DiscordPlatformMessenger : IPlatformMessenger
 {
+    private readonly RestClient restClient;
+    private readonly DiscordInteractionReplyCache interactionReplies;
+    private readonly ILogger<DiscordPlatformMessenger>? logger;
+
+    public DiscordPlatformMessenger(
+        RestClient restClient,
+        DiscordInteractionReplyCache interactionReplies)
+        : this(restClient, interactionReplies, logger: null)
+    {
+    }
+
+    public DiscordPlatformMessenger(
+        RestClient restClient,
+        DiscordInteractionReplyCache interactionReplies,
+        ILogger<DiscordPlatformMessenger>? logger)
+    {
+        this.restClient = restClient;
+        this.interactionReplies = interactionReplies;
+        this.logger = logger;
+    }
+
     public async Task<PlatformMessageRef> SendScheduleAsync(PlatformScheduleMessage message, CancellationToken ct)
     {
         var (embeds, actionRows) = DiscordSessionBatchRenderer.Render(message.View);
 
-        var channelId = ulong.Parse(message.Group.ExternalChannelId
-            ?? message.Group.ExternalGroupId);
+        var channelId = GetChannelId(message.Group);
 
         var msg = await restClient.SendMessageAsync(
             channelId,
@@ -27,7 +49,7 @@ public sealed class DiscordPlatformMessenger(
             PlatformKind.Discord,
             message.Group.ExternalGroupId,
             null,
-            msg.Id.ToString());
+            msg.Id.ToString(CultureInfo.InvariantCulture));
     }
 
     public async Task UpdateScheduleAsync(PlatformScheduleMessage message, CancellationToken ct)
@@ -37,9 +59,8 @@ public sealed class DiscordPlatformMessenger(
 
         var (embeds, actionRows) = DiscordSessionBatchRenderer.Render(message.View);
 
-        var channelId = ulong.Parse(message.Group.ExternalChannelId
-            ?? message.Group.ExternalGroupId);
-        var messageId = ulong.Parse(message.ExistingMessage.ExternalMessageId);
+        var channelId = GetChannelId(message.Group);
+        var messageId = ParseSnowflake(message.ExistingMessage.ExternalMessageId);
 
         await restClient.ModifyMessageAsync(
             channelId,
@@ -53,18 +74,12 @@ public sealed class DiscordPlatformMessenger(
 
     public async Task SendGroupMessageAsync(PlatformGroup group, string htmlText, CancellationToken ct)
     {
-        var channelIdStr = group.ExternalChannelId ?? group.ExternalGroupId
-            ?? throw new InvalidOperationException("Group has no ExternalChannelId or ExternalGroupId.");
-
-        if (!ulong.TryParse(channelIdStr, out var channelId))
-            throw new InvalidOperationException($"Invalid Discord channel/group ID: '{channelIdStr}'.");
-
-        await restClient.SendMessageAsync(channelId, htmlText);
+        await restClient.SendMessageAsync(GetChannelId(group), htmlText);
     }
 
-    public Task SendPrivateMessageAsync(PlatformPrivateMessage message, CancellationToken ct)
+    public async Task SendPrivateMessageAsync(PlatformPrivateMessage message, CancellationToken ct)
     {
-        return Task.CompletedTask;
+        await SendDirectContentAsync(message.Recipient, message.HtmlText, ct);
     }
 
     public Task AnswerInteractionAsync(PlatformInteractionReply reply, CancellationToken ct)
@@ -77,4 +92,281 @@ public sealed class DiscordPlatformMessenger(
     {
         return Task.CompletedTask;
     }
+
+    public async Task<PlatformMessageRef> SendConfirmationRequestAsync(
+        PlatformConfirmationRequest request,
+        CancellationToken ct)
+    {
+        var channelId = GetChannelId(request.Group);
+        var message = await restClient.SendMessageAsync(
+            channelId,
+            new MessageProperties()
+                .WithEmbeds([BuildConfirmationEmbed(request)])
+                .WithComponents(BuildRsvpRows(request.SessionId, disabled: false)));
+
+        return new PlatformMessageRef(
+            PlatformKind.Discord,
+            request.Group.ExternalGroupId,
+            null,
+            message.Id.ToString(CultureInfo.InvariantCulture));
+    }
+
+    public async Task UpdateConfirmationRequestAsync(PlatformRsvpMessageUpdate update, CancellationToken ct)
+    {
+        if (update.Request.ExistingMessage is null)
+            return;
+
+        var channelId = GetChannelId(update.Request.Group);
+        var messageId = ParseSnowflake(update.Request.ExistingMessage.ExternalMessageId);
+        var components = BuildRsvpRows(update.Request.SessionId, update.DisableActions);
+
+        await restClient.ModifyMessageAsync(
+            channelId,
+            messageId,
+            options =>
+            {
+                options.Embeds = [BuildConfirmationEmbed(update.Request)];
+                options.Components = components;
+            });
+    }
+
+    public async Task<PlatformMessageRef> SendJoinLinkNotificationAsync(
+        PlatformJoinLinkNotification notification,
+        CancellationToken ct)
+    {
+        var channelId = GetChannelId(notification.Group);
+        var message = await restClient.SendMessageAsync(
+            channelId,
+            new MessageProperties().WithEmbeds([BuildJoinLinkEmbed(notification)]));
+
+        return new PlatformMessageRef(
+            PlatformKind.Discord,
+            notification.Group.ExternalGroupId,
+            null,
+            message.Id.ToString(CultureInfo.InvariantCulture));
+    }
+
+    public async Task SendDirectSessionNotificationAsync(
+        PlatformDirectSessionNotification notification,
+        CancellationToken ct)
+    {
+        try
+        {
+            await SendDirectContentAsync(
+                notification.Recipient,
+                BuildDirectContent(notification),
+                ct);
+        }
+        catch (Exception ex)
+        {
+            logger?.LogWarning(
+                ex,
+                "Failed to send Discord direct notification {NotificationKind} for session {SessionId} to user {ExternalUserId}",
+                notification.Kind,
+                notification.SessionId,
+                notification.Recipient.ExternalUserId);
+        }
+    }
+
+    public async Task SendRsvpOutcomeAsync(PlatformRsvpOutcomeNotification notification, CancellationToken ct)
+    {
+        if (notification.Kind == PlatformRsvpOutcomeKind.GroupAllConfirmed && notification.Group is not null)
+        {
+            await restClient.SendMessageAsync(
+                GetChannelId(notification.Group),
+                BuildRsvpGroupOutcomeContent(notification));
+            return;
+        }
+
+        var directKind = notification.Kind == PlatformRsvpOutcomeKind.GmPlayerDeclined
+            ? PlatformDirectSessionNotificationKind.RsvpDeclined
+            : PlatformDirectSessionNotificationKind.RsvpAllConfirmed;
+
+        foreach (var recipient in notification.Recipients)
+        {
+            await SendDirectSessionNotificationAsync(
+                new PlatformDirectSessionNotification(
+                    directKind,
+                    recipient,
+                    notification.SessionId,
+                    notification.Title,
+                    notification.ScheduledAt,
+                    ActorDisplayName: notification.ActorDisplayName),
+                ct);
+        }
+    }
+
+    public async Task UpdateRescheduleVoteAsync(PlatformRescheduleVoteUpdate update, CancellationToken ct)
+    {
+        var (embed, actionRow) = DiscordRescheduleVotingRenderer.Render(
+            update.Title,
+            update.CurrentScheduledAt,
+            update.VotingDeadlineAt,
+            update.Options,
+            update.Participants,
+            update.Votes);
+
+        var disabledRow = new ActionRowProperties();
+        foreach (var button in actionRow.OfType<ButtonProperties>())
+        {
+            disabledRow.Add(new ButtonProperties(
+                button.CustomId,
+                button.Label ?? string.Empty,
+                ButtonStyle.Secondary)
+            {
+                Disabled = true
+            });
+        }
+
+        var updatedEmbed = embed.WithDescription(
+            $"{embed.Description}\n\n{BuildRescheduleResultText(update)}");
+
+        await restClient.ModifyMessageAsync(
+            GetChannelId(update.Group),
+            ParseSnowflake(update.ExistingMessage.ExternalMessageId),
+            options =>
+            {
+                options.Embeds = [updatedEmbed];
+                options.Components = [disabledRow];
+            });
+    }
+
+    private static EmbedProperties BuildConfirmationEmbed(PlatformConfirmationRequest request)
+    {
+        var embed = new EmbedProperties()
+            .WithTitle($"Подтверждение: {request.Title}")
+            .WithDescription(BuildConfirmationDescription(request))
+            .WithColor(new Color(0x5865F2));
+
+        return embed.AddFields(
+        [
+            BuildParticipantField("Подтвердили", request.Participants, RsvpStatus.Confirmed),
+            BuildParticipantField("Отказались", request.Participants, RsvpStatus.Declined),
+            BuildParticipantField("Ожидаем ответ", request.Participants, RsvpStatus.Pending)
+        ]);
+    }
+
+    private static string BuildConfirmationDescription(PlatformConfirmationRequest request) =>
+        $"Время: **{request.ScheduledAt.FormatMoscow()}** (МСК)\n" +
+        "Подтвердите участие кнопкой ниже.";
+
+    private static EmbedFieldProperties BuildParticipantField(
+        string title,
+        IReadOnlyList<PlatformSessionParticipant> participants,
+        string status)
+    {
+        var values = participants
+            .Where(participant => participant.RsvpStatus == status)
+            .Select(FormatDiscordParticipant)
+            .ToList();
+
+        return new EmbedFieldProperties()
+            .WithName(title)
+            .WithValue(values.Count == 0 ? "—" : string.Join("\n", values))
+            .WithInline();
+    }
+
+    private static EmbedProperties BuildJoinLinkEmbed(PlatformJoinLinkNotification notification)
+    {
+        var mentions = notification.ConfirmedPlayers.Count == 0
+            ? "—"
+            : string.Join(", ", notification.ConfirmedPlayers.Select(p => Mention(p.User)));
+
+        return new EmbedProperties()
+            .WithTitle($"Ссылка на игру: {notification.Title}")
+            .WithDescription(
+                $"Время: **{notification.ScheduledAt.FormatMoscow()}** (МСК)\n" +
+                $"Ссылка: {notification.JoinLink}\n\n" +
+                $"Участники: {mentions}")
+            .WithUrl(notification.JoinLink)
+            .WithColor(new Color(0x57F287));
+    }
+
+    private static IReadOnlyList<ActionRowProperties> BuildRsvpRows(Guid sessionId, bool disabled)
+    {
+        var row = new ActionRowProperties();
+        row.Add(new ButtonProperties($"rsvp:confirm:{sessionId}", "Буду", ButtonStyle.Success)
+        {
+            Disabled = disabled
+        });
+        row.Add(new ButtonProperties($"rsvp:decline:{sessionId}", "Не смогу", ButtonStyle.Danger)
+        {
+            Disabled = disabled
+        });
+
+        return [row];
+    }
+
+    private static string BuildDirectContent(PlatformDirectSessionNotification notification)
+    {
+        var builder = new StringBuilder();
+        builder.AppendLine(notification.Kind switch
+        {
+            PlatformDirectSessionNotificationKind.ConfirmationRequest => "Нужно подтвердить участие",
+            PlatformDirectSessionNotificationKind.OneHourReminder => "Напоминание: сессия через час",
+            PlatformDirectSessionNotificationKind.JoinLink => "Ссылка на игру",
+            PlatformDirectSessionNotificationKind.RsvpAllConfirmed => "Все игроки подтвердили участие",
+            PlatformDirectSessionNotificationKind.RsvpDeclined => "Игрок отказался от участия",
+            PlatformDirectSessionNotificationKind.RescheduleApproved => "Сессия перенесена",
+            PlatformDirectSessionNotificationKind.RescheduleRejected => "Перенос сессии отклонен",
+            _ => "Уведомление по сессии"
+        });
+
+        builder.AppendLine();
+        builder.AppendLine($"**{notification.Title}**");
+        builder.AppendLine($"Время: **{notification.ScheduledAt.FormatMoscow()}** (МСК)");
+
+        if (!string.IsNullOrWhiteSpace(notification.JoinLink))
+            builder.AppendLine($"Ссылка: {notification.JoinLink}");
+
+        if (!string.IsNullOrWhiteSpace(notification.ActorDisplayName))
+            builder.AppendLine($"Игрок: {notification.ActorDisplayName}");
+
+        if (!string.IsNullOrWhiteSpace(notification.Reason))
+            builder.AppendLine($"Причина: {notification.Reason}");
+
+        return builder.ToString();
+    }
+
+    private static string BuildRsvpGroupOutcomeContent(PlatformRsvpOutcomeNotification notification) =>
+        $"Все участники подтвердили сессию **{notification.Title}** на " +
+        $"**{notification.ScheduledAt.FormatMoscow()}** (МСК).";
+
+    private static string BuildRescheduleResultText(PlatformRescheduleVoteUpdate update)
+    {
+        if (update.SelectedOption is not null)
+        {
+            return "Голосование завершено. " +
+                $"Победил вариант {update.SelectedOption.DisplayOrder}: " +
+                $"**{update.SelectedOption.ProposedAt.FormatMoscow()}** (МСК).";
+        }
+
+        return $"Голосование завершено. {update.Decision.Reason}";
+    }
+
+    private async Task SendDirectContentAsync(PlatformUser recipient, string content, CancellationToken ct)
+    {
+        var userId = ParseSnowflake(recipient.ExternalUserId);
+        var dm = await restClient.GetDMChannelAsync(userId, cancellationToken: ct);
+        await restClient.SendMessageAsync(
+            dm.Id,
+            new MessageProperties().WithContent(content),
+            cancellationToken: ct);
+    }
+
+    private static string FormatDiscordParticipant(PlatformSessionParticipant participant) =>
+        $"{Mention(participant.User)} ({participant.User.DisplayName})";
+
+    private static string Mention(PlatformUser user) => $"<@{user.ExternalUserId}>";
+
+    private static ulong GetChannelId(PlatformGroup group)
+    {
+        var channelId = group.ExternalChannelId ?? group.ExternalGroupId
+            ?? throw new InvalidOperationException("Discord group has no channel or group identifier.");
+
+        return ParseSnowflake(channelId);
+    }
+
+    private static ulong ParseSnowflake(string value) =>
+        ulong.Parse(value, CultureInfo.InvariantCulture);
 }