live_recorder/src/LiveRecorder.Application/Services/LiveRoomStatusService.cs

using LiveRecorder.Application.Abstractions.Notifications;
using LiveRecorder.Application.Abstractions.Platforms;
using LiveRecorder.Application.Abstractions.Scripting;
using LiveRecorder.Domain.Entities;
using LiveRecorder.Domain.Enums;

namespace LiveRecorder.Application.Services;

public sealed class LiveRoomStatusService
{
    private readonly IEmailNotificationService _emailNotificationService;
    private readonly IWebhookNotificationService _webhookNotificationService;
    private readonly IEventScriptService _eventScriptService;

    public LiveRoomStatusService(
        IEmailNotificationService emailNotificationService,
        IWebhookNotificationService webhookNotificationService,
        IEventScriptService eventScriptService)
    {
        _emailNotificationService = emailNotificationService;
        _webhookNotificationService = webhookNotificationService;
        _eventScriptService = eventScriptService;
    }

    public async Task ApplySnapshotAsync(
        LiveRoom liveRoom,
        LiveStatusSnapshot liveStatus,
        DateTimeOffset observedAt,
        bool updateMetadata = true,
        CancellationToken cancellationToken = default)
    {
        ArgumentNullException.ThrowIfNull(liveRoom);
        ArgumentNullException.ThrowIfNull(liveStatus);

        var wasLive = liveRoom.AvailabilityStatus == LiveRoomAvailabilityStatus.Live;

        if (updateMetadata)
        {
            liveRoom.UpdateMetadata(
                liveStatus.Title,
                liveStatus.AnchorName,
                liveStatus.AnchorId,
                liveStatus.AvatarUrl,
                liveStatus.CoverUrl,
                observedAt);
        }

        liveRoom.UpdateAvailability(
            liveStatus.IsLive ? LiveRoomAvailabilityStatus.Live : LiveRoomAvailabilityStatus.Offline,
            observedAt);

        if (wasLive && !liveStatus.IsLive)
        {
            await _eventScriptService.RunLiveEndedAsync(liveRoom, observedAt, cancellationToken);
            return;
        }

        if (!liveStatus.IsLive || liveRoom.HasSentLiveNotificationForCurrentSession)
        {
            return;
        }

        var eventScriptResult = await _eventScriptService.RunLiveStartedAsync(liveRoom, observedAt, cancellationToken);
        await _emailNotificationService.SendLiveStartedAsync(
            liveRoom,
            cancellationToken,
            eventScriptOutput: eventScriptResult?.CustomLogOutput);
        await _webhookNotificationService.SendLiveStartedAsync(
            liveRoom,
            cancellationToken,
            eventScriptOutput: eventScriptResult?.CustomLogOutput);
        liveRoom.MarkLiveNotificationSent(observedAt);
    }
}