60 lines
No EOL
2 KiB
C#
60 lines
No EOL
2 KiB
C#
using Foxnouns.Backend.Database;
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using Foxnouns.Backend.Database.Models;
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using Foxnouns.Backend.Utils;
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using Microsoft.EntityFrameworkCore;
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using Newtonsoft.Json;
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using NodaTime;
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namespace Foxnouns.Backend.Services;
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public class KeyCacheService(DatabaseContext db, IClock clock, ILogger logger)
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{
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public Task SetKeyAsync(string key, string value, Duration expireAfter) =>
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SetKeyAsync(key, value, clock.GetCurrentInstant() + expireAfter);
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public async Task SetKeyAsync(string key, string value, Instant expires)
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{
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db.TemporaryKeys.Add(new TemporaryKey
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{
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Expires = expires,
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Key = key,
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Value = value,
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});
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await db.SaveChangesAsync();
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}
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public async Task<string?> GetKeyAsync(string key, bool delete = false)
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{
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var value = await db.TemporaryKeys.FirstOrDefaultAsync(k => k.Key == key);
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if (value == null) return null;
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if (delete)
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{
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await db.TemporaryKeys.Where(k => k.Key == key).ExecuteDeleteAsync();
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await db.SaveChangesAsync();
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}
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return value.Value;
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}
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public async Task DeleteExpiredKeysAsync()
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{
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var count = await db.TemporaryKeys.Where(k => k.Expires < clock.GetCurrentInstant()).ExecuteDeleteAsync();
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if (count != 0) logger.Information("Removed {Count} expired keys from the database", count);
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}
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public Task SetKeyAsync<T>(string key, T obj, Duration expiresAt) where T : class =>
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SetKeyAsync(key, obj, clock.GetCurrentInstant() + expiresAt);
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public async Task SetKeyAsync<T>(string key, T obj, Instant expires) where T : class
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{
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var value = JsonConvert.SerializeObject(obj);
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await SetKeyAsync(key, value, expires);
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}
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public async Task<T?> GetKeyAsync<T>(string key, bool delete = false) where T : class
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{
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var value = await GetKeyAsync(key, delete: false);
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return value == null ? default : JsonConvert.DeserializeObject<T>(value);
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}
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} |