47 lines
1.6 KiB
C#
47 lines
1.6 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text.Json;
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namespace SharpChat.EventStorage
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{
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public class VirtualEventStorage : IEventStorage {
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private readonly Dictionary<long, StoredEventInfo> Events = new();
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public long AddEvent(string type, ChatUser user, ChatChannel channel, object data = null, StoredEventFlags flags = StoredEventFlags.None) {
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if(type == null)
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throw new ArgumentNullException(nameof(type));
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// VES is meant as an emergency fallback but this is something else
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JsonDocument hack = JsonDocument.Parse(data == null ? "{}" : JsonSerializer.Serialize(data));
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long id = SharpId.Next();
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Events.Add(id, new(id, type, user, DateTimeOffset.Now, null, channel?.Name ?? null, hack, flags));
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return id;
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}
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public StoredEventInfo GetEvent(long seqId) {
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return Events.TryGetValue(seqId, out StoredEventInfo evt) ? evt : null;
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}
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public void RemoveEvent(StoredEventInfo evt) {
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if(evt == null)
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throw new ArgumentNullException(nameof(evt));
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Events.Remove(evt.Id);
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}
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public IEnumerable<StoredEventInfo> GetChannelEventLog(string channelName, int amount = 20, int offset = 0) {
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IEnumerable<StoredEventInfo> subset = Events.Values.Where(ev => ev.ChannelName == channelName);
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int start = subset.Count() - offset - amount;
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if(start < 0) {
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amount += start;
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start = 0;
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}
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return subset.Skip(start).Take(amount).ToArray();
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}
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}
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}
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