43 lines
1.3 KiB
C#
43 lines
1.3 KiB
C#
 
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using Blazored.LocalStorage;
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using decePubClient.Models;
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namespace decePubClient.Services
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{
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/// <summary>
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/// Asks a persona, once, before its first reaction or poll vote, to accept that these are public and visible as that
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/// persona (an owner decision). PublicNoticeHost shows the question; Confirm returns true at once for a persona that
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/// already accepted it, and false when the reader declines.
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/// </summary>
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public class PublicNoticeService(ILocalStorageService localStorage)
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{
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TaskCompletionSource<bool> pending;
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public event Action Changed;
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public bool IsAsking => pending is not null;
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public async Task<bool> Confirm(string personaId, CancellationToken cancellationToken = default)
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{
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if (string.IsNullOrEmpty(personaId))
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return false;
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var seen = await localStorage.GetItemAsync<PublicActionNotices>(nameof(PublicActionNotices), cancellationToken) ?? new();
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if (seen.PersonaIds.Contains(personaId))
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return true;
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pending = new TaskCompletionSource<bool>();
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Changed?.Invoke();
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var accepted = await pending.Task;
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pending = null;
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Changed?.Invoke();
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if (!accepted)
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return false;
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seen.PersonaIds.Add(personaId);
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await localStorage.SetItemAsync(nameof(PublicActionNotices), seen, cancellationToken);
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return true;
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}
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public void Answer(bool accepted) => pending?.TrySetResult(accepted);
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}
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}
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