161 lines
8.5 KiB
C#
161 lines
8.5 KiB
C#
using Evergreen.Health.Application.Health.Devices.Contracts;
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using Evergreen.Health.Application.Health.Integrations.HomeAssistant;
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using System.Globalization;
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namespace Evergreen.Health.Application.Health.Scenes;
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/// <summary>共用发送、取消、回读和有限重试，任何家具都可复用。</summary>
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public sealed class DeviceActionRunner
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{
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private readonly IHomeAssistantGateway _gateway;
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private readonly TimeProvider _time;
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private readonly DeviceExecutionOptions _options;
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private readonly IReadOnlyList<IDeviceActionSafetyRule> _safety;
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private readonly SemaphoreSlim _commandGate = new(1, 1);
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public DeviceActionRunner(IHomeAssistantGateway gateway, TimeProvider time, DeviceExecutionOptions options,
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IEnumerable<IDeviceActionSafetyRule>? safety = null)
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=> (_gateway, _time, _options, _safety) = (gateway, time, options, safety?.ToArray() ?? []);
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public static bool IsAvailable(HomeAssistantState state)
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=> !string.IsNullOrWhiteSpace(state.State) &&
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!string.Equals(state.State, "unavailable", StringComparison.OrdinalIgnoreCase) &&
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(!string.Equals(state.State, "unknown", StringComparison.OrdinalIgnoreCase) ||
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state.EntityId.StartsWith("button.", StringComparison.OrdinalIgnoreCase));
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public async Task<HomeAssistantState> ReadAvailableStateAsync(string entityId, CancellationToken cancellationToken)
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{
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if (string.IsNullOrWhiteSpace(entityId)) throw new InvalidOperationException("参数实体尚未配置");
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var state = (await _gateway.GetStatesAsync(cancellationToken)).FirstOrDefault(item =>
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string.Equals(item.EntityId, entityId, StringComparison.OrdinalIgnoreCase));
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if (state is null || !IsAvailable(state)) throw new InvalidOperationException("目标参数实体当前离线或不可用");
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return state;
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}
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public async Task SendAsync(DeviceCommand command, CancellationToken cancellationToken)
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{
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cancellationToken.ThrowIfCancellationRequested();
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if (string.IsNullOrWhiteSpace(command.EntityId))
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throw new InvalidOperationException("参数实体尚未配置");
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await _commandGate.WaitAsync(cancellationToken);
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try
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{
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using var timeout = new CancellationTokenSource(_options.CommandTimeout, _time);
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using var bounded = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken, timeout.Token);
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try
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{
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if (command.ValidateCurrentState is not null)
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command.ValidateCurrentState(await ReadAvailableStateAsync(command.EntityId, bounded.Token));
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foreach (var rule in _safety) await rule.ValidateAsync(command, bounded.Token);
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await _gateway.CallServiceAsync(command.Domain, command.Service, command.ToServiceData(), bounded.Token);
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}
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catch (OperationCanceledException) when (!cancellationToken.IsCancellationRequested && timeout.IsCancellationRequested)
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{
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throw new TimeoutException($"{command.Name}发送超时，未确认完成");
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}
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foreach (var rule in _safety) rule.Accepted(command, _time.GetUtcNow());
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}
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finally { _commandGate.Release(); }
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}
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public Task DelayAsync(TimeSpan delay, CancellationToken cancellationToken)
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=> Task.Delay(delay, _time, cancellationToken);
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public async Task RunAsync(IReadOnlyDictionary<string, HomeAssistantState> states,
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List<HomeAssistantActionResult> results, DeviceCommand command, CancellationToken cancellationToken,
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bool requireAvailable = true)
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{
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cancellationToken.ThrowIfCancellationRequested();
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var action = new HomeAssistantActionResult { Name = command.Name, EntityId = command.EntityId };
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results.Add(action);
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if (string.IsNullOrWhiteSpace(command.EntityId))
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{
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action.Status = "Skipped"; action.Message = "实体未配置"; return;
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}
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if (requireAvailable && (!states.TryGetValue(command.EntityId, out var state) || !IsAvailable(state)))
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{
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action.Status = "Skipped"; action.Message = "实体不存在或当前离线"; return;
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}
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try
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{
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await SendAsync(command, cancellationToken);
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action.Status = "Succeeded"; action.Message = "控制指令已发送";
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}
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catch (Exception exception) when (exception is not OperationCanceledException)
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{
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action.Status = "Failed"; action.Message = exception.Message;
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}
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}
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public async Task VerifyParameterAsync(DeviceCommand command, CancellationToken cancellationToken)
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{
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var results = new List<HomeAssistantActionResult>
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{
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new() { Name = command.Name, EntityId = command.EntityId, Status = "Succeeded" }
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};
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await VerifyBatchAsync([command], results, cancellationToken);
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if (results[0].Status != "Succeeded") throw new InvalidOperationException(results[0].Message);
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}
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public async Task VerifyBatchAsync(IReadOnlyList<DeviceCommand> commands,
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List<HomeAssistantActionResult> results, CancellationToken cancellationToken)
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{
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var pending = commands.Where(command => !string.IsNullOrWhiteSpace(command.EntityId) &&
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command.ExpectedState is not null).ToList();
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for (var round = 0; round < _options.VerificationAttempts && pending.Count > 0; round++)
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{
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await DelayAsync(_options.VerificationDelay, cancellationToken);
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IReadOnlyList<HomeAssistantState> states;
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try { states = await _gateway.GetStatesAsync(cancellationToken); }
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catch (Exception exception) when (exception is not OperationCanceledException)
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{
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foreach (var command in pending)
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{
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var action = FindResult(results, command);
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action.Status = "Failed"; action.Message = $"无法回读确认：{exception.Message}";
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}
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return;
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}
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foreach (var command in pending.ToArray())
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{
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var action = FindResult(results, command);
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var state = states.FirstOrDefault(item => string.Equals(item.EntityId, command.EntityId, StringComparison.OrdinalIgnoreCase));
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var actual = state is null ? null : command.ExpectedAttribute is null
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? state.State : state.GetStringAttribute(command.ExpectedAttribute);
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if (state is not null && IsAvailable(state) && actual is not null && Matches(actual, command.ExpectedState!))
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{
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action.Status = "Succeeded"; action.Message = round == 0 ? "已回读确认目标状态" : "重试后已回读确认目标状态";
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pending.Remove(command); continue;
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}
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if (round == _options.VerificationAttempts - 1)
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{
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action.Status = "Failed"; action.Message = $"未确认目标{(command.ExpectedAttribute is null ? "状态" : command.ExpectedAttribute)} {command.ExpectedState}（当前：{actual ?? "未读取到"}）";
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pending.Remove(command); continue;
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}
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if (!command.RetryOnVerificationMismatch) continue;
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// 关闭属于尽力而为：缓存离线不能阻止发出重试，发送失败也不影响其他家具。
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try { await SendAsync(command, cancellationToken); }
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catch (Exception exception) when (exception is not OperationCanceledException)
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{
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action.Status = "Failed"; action.Message = $"重试失败：{exception.Message}";
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}
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}
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}
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}
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private static HomeAssistantActionResult FindResult(List<HomeAssistantActionResult> results, DeviceCommand command)
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=> results.Last(item => item.Name == command.Name && item.EntityId == command.EntityId);
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private static bool Matches(string actual, string expected)
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=> string.Equals(actual, expected, StringComparison.OrdinalIgnoreCase) ||
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(decimal.TryParse(actual, NumberStyles.Number, CultureInfo.InvariantCulture, out var actualNumber) &&
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decimal.TryParse(expected, NumberStyles.Number, CultureInfo.InvariantCulture, out var expectedNumber) &&
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actualNumber == expectedNumber);
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}
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public sealed class DeviceExecutionOptions
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{
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public TimeSpan CommandTimeout { get; init; } = TimeSpan.FromSeconds(10);
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public int VerificationAttempts { get; init; } = 3;
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public TimeSpan VerificationDelay { get; init; } = TimeSpan.FromSeconds(2);
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}
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