39 lines
1.4 KiB
C#
39 lines
1.4 KiB
C#
using System;
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namespace SharpChat.RateLimiting {
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public class RateLimiter {
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private int Size { get; }
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private int WarnSize { get; }
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private int MinimumDelay { get; }
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private long[] Times { get; }
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public RateLimiter(int size, int warnSize, int minimumDelay) {
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if(size < 3)
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throw new ArgumentException(@"Size must be more than 1.", nameof(size));
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if(warnSize >= size && warnSize > 0)
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throw new ArgumentException(@"Warning Size must be less than Size, or less than 0 to be disabled.", nameof(warnSize));
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if(minimumDelay < 1000)
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throw new ArgumentException(@"Minimum Delay must be more than 999 milliseconds.", nameof(minimumDelay));
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Size = size;
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WarnSize = warnSize;
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MinimumDelay = minimumDelay;
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Times = new long[Size];
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}
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private bool IsSeeding
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=> (Times[0] < 1 && Times[1] < 1);
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public bool ShouldKick
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=> !IsSeeding && Times[0] + MinimumDelay >= Times[Size - 1];
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public bool ShouldWarn
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=> WarnSize > 0 && !IsSeeding && Times[0] + MinimumDelay >= Times[WarnSize - 1];
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public void Update() {
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for(int i = 0; i < Size - 1; ++i)
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Times[i] = Times[i + 1];
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Times[Size - 1] = DateTimeOffset.Now.ToUnixTimeMilliseconds();
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}
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}
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}
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