sharp-chat/SharpChatCommon/EventStorage/VirtualEventStorage.cs

54 lines
1.8 KiB
C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.Json;
namespace SharpChat.EventStorage {
public class VirtualEventStorage : IEventStorage {
private readonly Dictionary<long, StoredEventInfo> Events = new();
public void AddEvent(
long id,
string type,
string? channelName,
long senderId,
string? senderName,
Colour senderColour,
int senderRank,
string? senderNick,
UserPermissions senderPerms,
object? data = null
) {
// VES is meant as an emergency fallback but this is something else
JsonDocument hack = JsonDocument.Parse(data == null ? "{}" : JsonSerializer.Serialize(data));
Events.Add(id, new(id, type, senderId < 1 ? null : new UserInfo(
senderId,
senderName ?? string.Empty,
senderColour,
senderRank,
senderPerms,
senderNick
), DateTimeOffset.Now, null, channelName, hack));
}
public StoredEventInfo? GetEvent(long seqId) {
return Events.TryGetValue(seqId, out StoredEventInfo? evt) ? evt : null;
}
public void RemoveEvent(StoredEventInfo evt) {
Events.Remove(evt.Id);
}
public IEnumerable<StoredEventInfo> GetChannelEventLog(string channelName, int amount = 20, int startAt = 0) {
IEnumerable<StoredEventInfo> subset = Events.Values.Where(ev => ev.ChannelName == channelName);
int start = subset.Count() - startAt - amount;
if(start < 0) {
amount += start;
start = 0;
}
return subset.Skip(start).Take(amount).ToArray();
}
}
}