61 lines
1.8 KiB
C#
61 lines
1.8 KiB
C#
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using SharpChat.Configuration;
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using System;
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using System.IO;
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using System.Linq;
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namespace SharpChat {
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public class WelcomeMessage {
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private CachedValue<string> RandomFile { get; }
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private TimeSpan CacheLife { get; } = TimeSpan.FromMinutes(10);
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private bool HasRandomValue { get; set; }
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private DateTimeOffset LastRandomRead { get; set; } = DateTimeOffset.MinValue;
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private readonly object Sync = new();
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public bool HasRandom {
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get {
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lock(Sync) {
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if(DateTimeOffset.Now - LastRandomRead >= CacheLife)
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ReloadRandomFile();
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return HasRandomValue;
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}
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}
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}
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private string[] RandomStrings { get; set; }
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public WelcomeMessage(IConfig config) {
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if(config == null)
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throw new ArgumentNullException(nameof(config));
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RandomFile = config.ReadCached(@"random", string.Empty, CacheLife);
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}
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public void ReloadRandomFile() {
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lock(Sync) {
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string randomFile = RandomFile;
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if(File.Exists(randomFile)) {
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RandomStrings = File.ReadAllLines(randomFile).Where(x => !string.IsNullOrWhiteSpace(x)).ToArray();
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HasRandomValue = RandomStrings.Length > 0;
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} else {
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HasRandomValue = false;
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RandomStrings = null;
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}
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HasRandomValue = RandomStrings?.Length > 0;
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LastRandomRead = DateTimeOffset.Now;
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}
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}
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public string GetRandomString() {
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lock(Sync)
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return HasRandom
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? RandomStrings.ElementAtOrDefault(RNG.Next(RandomStrings.Length))
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: string.Empty;
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}
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}
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}
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