118 lines
3.6 KiB
C#
118 lines
3.6 KiB
C#
using System;
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using System.Collections.Concurrent;
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using System.Linq;
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using MareSynchronos.Services.Mediator;
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using MareSynchronos.WebAPI;
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using Microsoft.Extensions.Logging;
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using MareSynchronos.API.Data;
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namespace MareSynchronos.Services;
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public sealed class TypingIndicatorStateService : IMediatorSubscriber, IDisposable
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{
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private sealed record TypingEntry(UserData User, DateTime FirstSeen, DateTime LastUpdate);
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private readonly ConcurrentDictionary<string, TypingEntry> _typingUsers = new(StringComparer.Ordinal);
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private readonly ApiController _apiController;
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private readonly ILogger<TypingIndicatorStateService> _logger;
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private DateTime _selfTypingLast = DateTime.MinValue;
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private DateTime _selfTypingStart = DateTime.MinValue;
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private bool _selfTypingActive;
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public TypingIndicatorStateService(ILogger<TypingIndicatorStateService> logger, MareMediator mediator, ApiController apiController)
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{
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_logger = logger;
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_apiController = apiController;
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Mediator = mediator;
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mediator.Subscribe<UserTypingStateMessage>(this, OnTypingState);
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}
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public void Dispose()
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{
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Mediator.UnsubscribeAll(this);
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}
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public MareMediator Mediator { get; }
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public void SetSelfTypingLocal(bool isTyping)
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{
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if (isTyping)
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{
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if (!_selfTypingActive)
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_selfTypingStart = DateTime.UtcNow;
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_selfTypingLast = DateTime.UtcNow;
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}
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else
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{
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_selfTypingStart = DateTime.MinValue;
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}
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_selfTypingActive = isTyping;
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}
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private void OnTypingState(UserTypingStateMessage msg)
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{
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var uid = msg.Typing.User.UID;
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var now = DateTime.UtcNow;
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if (string.Equals(uid, _apiController.UID, StringComparison.Ordinal))
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{
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_selfTypingActive = msg.Typing.IsTyping;
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if (_selfTypingActive)
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{
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if (_selfTypingStart == DateTime.MinValue)
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_selfTypingStart = now;
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_selfTypingLast = now;
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}
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else
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{
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_selfTypingStart = DateTime.MinValue;
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}
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_logger.LogInformation("Typing state self -> {state}", _selfTypingActive);
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}
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else if (msg.Typing.IsTyping)
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{
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_typingUsers.AddOrUpdate(uid,
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_ => new TypingEntry(msg.Typing.User, now, now),
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(_, existing) => new TypingEntry(msg.Typing.User, existing.FirstSeen, now));
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}
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else
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{
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_typingUsers.TryRemove(uid, out _);
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}
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}
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public bool TryGetSelfTyping(TimeSpan maxAge, out DateTime startTyping, out DateTime lastTyping)
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{
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startTyping = _selfTypingStart;
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lastTyping = _selfTypingLast;
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if (!_selfTypingActive)
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return false;
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var now = DateTime.UtcNow;
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if ((now - _selfTypingLast) >= maxAge)
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{
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_selfTypingActive = false;
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_selfTypingStart = DateTime.MinValue;
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return false;
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}
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return true;
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}
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public IReadOnlyDictionary<string, (UserData User, DateTime FirstSeen, DateTime LastUpdate)> GetActiveTypers(TimeSpan maxAge)
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{
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var now = DateTime.UtcNow;
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foreach (var kvp in _typingUsers.ToArray())
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{
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if ((now - kvp.Value.LastUpdate) >= maxAge)
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{
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_typingUsers.TryRemove(kvp.Key, out _);
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}
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}
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return _typingUsers.ToDictionary(k => k.Key, v => (v.Value.User, v.Value.FirstSeen, v.Value.LastUpdate), StringComparer.Ordinal);
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}
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}
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