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using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text.Json;
using System.Threading;
using System.Threading.Tasks;
using Jellyfin.LiveTv.Configuration;
using Jellyfin.LiveTv.Guide;
using MediaBrowser.Common.Configuration;
using MediaBrowser.Common.Extensions;
using MediaBrowser.Controller.LiveTv;
using MediaBrowser.Model.Dto;
using MediaBrowser.Model.LiveTv;
using MediaBrowser.Model.Tasks;
using Microsoft.Extensions.Logging;
namespace Jellyfin.LiveTv.TunerHosts;
/// <inheritdoc />
public class TunerHostManager : ITunerHostManager
{
private const int TunerDiscoveryDurationMs = 3000;
private readonly ILogger<TunerHostManager> _logger;
private readonly IConfigurationManager _config;
private readonly ITaskManager _taskManager;
private readonly ITunerHost[] _tunerHosts;
/// <summary>
/// Initializes a new instance of the <see cref="TunerHostManager"/> class.
/// </summary>
/// <param name="logger">The <see cref="ILogger{T}"/>.</param>
/// <param name="config">The <see cref="IConfigurationManager"/>.</param>
/// <param name="taskManager">The <see cref="ITaskManager"/>.</param>
/// <param name="tunerHosts">The <see cref="IEnumerable{T}"/>.</param>
public TunerHostManager(
ILogger<TunerHostManager> logger,
IConfigurationManager config,
ITaskManager taskManager,
IEnumerable<ITunerHost> tunerHosts)
{
_logger = logger;
_config = config;
_taskManager = taskManager;
_tunerHosts = tunerHosts.Where(t => t.IsSupported).ToArray();
}
/// <inheritdoc />
public IReadOnlyList<ITunerHost> TunerHosts => _tunerHosts;
/// <inheritdoc />
public IEnumerable<NameIdPair> GetTunerHostTypes()
=> _tunerHosts.OrderBy(i => i.Name).Select(i => new NameIdPair
{
Name = i.Name,
Id = i.Type
});
/// <inheritdoc />
public async Task<TunerHostInfo> SaveTunerHost(TunerHostInfo info, bool dataSourceChanged = true)
{
info = JsonSerializer.Deserialize<TunerHostInfo>(JsonSerializer.SerializeToUtf8Bytes(info))!;
var provider = _tunerHosts.FirstOrDefault(i => string.Equals(info.Type, i.Type, StringComparison.OrdinalIgnoreCase));
if (provider is null)
{
throw new ResourceNotFoundException();
}
if (provider is IConfigurableTunerHost configurable)
{
await configurable.Validate(info).ConfigureAwait(false);
}
var config = _config.GetLiveTvConfiguration();
var list = config.TunerHosts;
var index = Array.FindIndex(list, i => string.Equals(i.Id, info.Id, StringComparison.OrdinalIgnoreCase));
if (index == -1 || string.IsNullOrWhiteSpace(info.Id))
{
info.Id = Guid.NewGuid().ToString("N", CultureInfo.InvariantCulture);
config.TunerHosts = [..list, info];
}
else
{
config.TunerHosts[index] = info;
}
_config.SaveConfiguration("livetv", config);
if (dataSourceChanged)
{
_taskManager.CancelIfRunningAndQueue<RefreshGuideScheduledTask>();
}
return info;
}
/// <inheritdoc />
public async IAsyncEnumerable<TunerHostInfo> DiscoverTuners(bool newDevicesOnly)
{
var configuredDeviceIds = _config.GetLiveTvConfiguration().TunerHosts
.Where(i => !string.IsNullOrWhiteSpace(i.DeviceId))
.Select(i => i.DeviceId)
.ToList();
foreach (var host in _tunerHosts)
{
var discoveredDevices = await DiscoverDevices(host, TunerDiscoveryDurationMs, CancellationToken.None).ConfigureAwait(false);
foreach (var tuner in discoveredDevices)
{
if (!newDevicesOnly || !configuredDeviceIds.Contains(tuner.DeviceId, StringComparer.OrdinalIgnoreCase))
{
yield return tuner;
}
}
}
}
/// <inheritdoc />
public async Task ScanForTunerDeviceChanges(CancellationToken cancellationToken)
{
foreach (var host in _tunerHosts)
{
await ScanForTunerDeviceChanges(host, cancellationToken).ConfigureAwait(false);
}
}
private async Task ScanForTunerDeviceChanges(ITunerHost host, CancellationToken cancellationToken)
{
var discoveredDevices = await DiscoverDevices(host, TunerDiscoveryDurationMs, cancellationToken).ConfigureAwait(false);
var configuredDevices = _config.GetLiveTvConfiguration().TunerHosts
.Where(i => string.Equals(i.Type, host.Type, StringComparison.OrdinalIgnoreCase))
.ToList();
foreach (var device in discoveredDevices)
{
var configuredDevice = configuredDevices.FirstOrDefault(i => string.Equals(i.DeviceId, device.DeviceId, StringComparison.OrdinalIgnoreCase));
if (configuredDevice is not null && !string.Equals(device.Url, configuredDevice.Url, StringComparison.OrdinalIgnoreCase))
{
_logger.LogInformation("Tuner url has changed from {PreviousUrl} to {NewUrl}", configuredDevice.Url, device.Url);
configuredDevice.Url = device.Url;
await SaveTunerHost(configuredDevice).ConfigureAwait(false);
}
}
}
private async Task<IList<TunerHostInfo>> DiscoverDevices(ITunerHost host, int discoveryDurationMs, CancellationToken cancellationToken)
{
try
{
var discoveredDevices = await host.DiscoverDevices(discoveryDurationMs, cancellationToken).ConfigureAwait(false);
foreach (var device in discoveredDevices)
{
_logger.LogInformation("Discovered tuner device {0} at {1}", host.Name, device.Url);
}
return discoveredDevices;
}
catch (Exception ex)
{
_logger.LogError(ex, "Error discovering tuner devices");
return Array.Empty<TunerHostInfo>();
}
}
}
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