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InMemoryStore.cs
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InMemoryStore.cs
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namespace PlanningPoker.Server;
public class InMemoryStore : IStore {
static readonly Dictionary<string, Session> _sessions = [];
private static Task UpdateSession(string sessionId, Func<Session, Session> update) {
var session = _sessions[sessionId];
_sessions[sessionId] = update(session);
return Task.CompletedTask;
}
private static Task UpdateParticipant(string sessionId, string participantId, Func<Participant, Participant> update) {
var participant = _sessions[sessionId].Participants.SingleOrDefault(p => p.ParticipantId == participantId);
return UpdateSession(sessionId, session => session with { Participants = [ ..session.Participants.Except([participant]), update(participant!) ] });
}
public Task CreateParticipantAsync(string sessionId, string participantId, string name) =>
UpdateSession(sessionId, session => session with {
Participants = [..session.Participants, new(participantId, name, "", 0) ]
});
public Task AddPointAsync(string sessionId, string point) =>
UpdateSession(sessionId, session => session with {
Points = [..session.Points, point]
});
public Task<string> CreateSessionAsync(string title, IEnumerable<string> points) {
string newSessionId;
do {
newSessionId = Guid.NewGuid().ToString().Split('-').First();
}
while (_sessions.ContainsKey(newSessionId));
_sessions.Add(newSessionId, new(title, [], State.Hidden, points));
return Task.FromResult(newSessionId);
}
public Task DeleteParticipantAsync(string sessionId, string participantId) =>
UpdateSession(sessionId, session => session with {
Participants = session.Participants.Where(p => p.ParticipantId != participantId).ToArray()
});
public Task<bool> ExistsSessionAsync(string sessionId) =>
Task.FromResult(_sessions.ContainsKey(sessionId));
public Task<Session?> GetSessionAsync(string sessionId) =>
Task.FromResult(_sessions.TryGetValue(sessionId, out var session) ? session : null);
public Task IncrementParticipantStarsAsync(string sessionId, string participantId, int count = 1) =>
UpdateParticipant(sessionId, participantId, participant => participant with {
Stars = participant.Stars + count
});
public Task RemovePointAsync(string sessionId, string point) =>
UpdateSession(sessionId, session => session with {
Points = session.Points.Except([point]).ToArray()
});
public Task UpdateAllParticipantPointsAsync(string sessionId, string points = "") =>
UpdateSession(sessionId, session => session with {
Participants = session.Participants.Select(p => p with { Points = points}).ToArray()
});
public Task UpdateParticipantNameAsync(string sessionId, string participantId, string name) =>
UpdateParticipant(sessionId, participantId, participant => participant with {
Name = name
});
public Task UpdateParticipantPointsAsync(string sessionId, string participantId, string points) =>
UpdateParticipant(sessionId, participantId, participant => participant with {
Points = points
});
public Task UpdateSessionStateAsync(string sessionId, State state) =>
UpdateSession(sessionId, session => session with {
State = state
});
public Task UpdateSessionTitleAsync(string sessionId, string title) =>
UpdateSession(sessionId, session => session with {
Title = title
});
}