Chris Chen
40 lines
1.4 KiB
C#
40 lines
1.4 KiB
C#
using Microsoft.AspNetCore.SignalR;
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using ROLAC.API.Services;
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namespace ROLAC.API.Hubs;
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/// <summary>
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/// Real-time hub backing the public Sunday attendance counter. Anonymous
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/// (no [Authorize]) so volunteers can use it without logging in. Every
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/// increment is broadcast to all connected clients so multiple people can
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/// count the same Sunday together and see each other's changes instantly.
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/// </summary>
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public class AttendanceHub : Hub
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{
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private readonly IMealAttendanceService _svc;
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public AttendanceHub(IMealAttendanceService svc) => _svc = svc;
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// Push the current counts to a client the moment it connects.
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public override async Task OnConnectedAsync()
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{
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var counts = await _svc.GetOrCreateAsync(_svc.Today);
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await Clients.Caller.SendAsync("ReceiveCounts", counts);
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await base.OnConnectedAsync();
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}
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// Apply a batched delta for one age group, then broadcast the new totals to everyone.
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public async Task Increment(string category, int delta)
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{
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var counts = await _svc.IncrementAsync(_svc.Today, category, delta);
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await Clients.All.SendAsync("ReceiveCounts", counts);
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}
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// Overwrite one age group with an absolute value, then broadcast the new totals to everyone.
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public async Task SetCount(string category, int value)
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{
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var counts = await _svc.SetAsync(_svc.Today, category, value);
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await Clients.All.SendAsync("ReceiveCounts", counts);
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}
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}
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