61 lines
No EOL
2.3 KiB
C#
61 lines
No EOL
2.3 KiB
C#
using Foxnouns.Backend.Database;
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using Foxnouns.Backend.Database.Models;
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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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private readonly ILogger _logger = logger.ForContext<KeyCacheService>();
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public Task SetKeyAsync(string key, string value, Duration expireAfter, CancellationToken ct = default) =>
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SetKeyAsync(key, value, clock.GetCurrentInstant() + expireAfter, ct);
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public async Task SetKeyAsync(string key, string value, Instant expires, CancellationToken ct = default)
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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(ct);
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}
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public async Task<string?> GetKeyAsync(string key, bool delete = false, CancellationToken ct = default)
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{
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var value = await db.TemporaryKeys.FirstOrDefaultAsync(k => k.Key == key, ct);
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if (value == null) return null;
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if (delete) await db.TemporaryKeys.Where(k => k.Key == key).ExecuteDeleteAsync(ct);
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return value.Value;
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}
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public async Task DeleteKeyAsync(string key, CancellationToken ct = default) =>
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await db.TemporaryKeys.Where(k => k.Key == key).ExecuteDeleteAsync(ct);
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public async Task DeleteExpiredKeysAsync(CancellationToken ct)
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{
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var count = await db.TemporaryKeys.Where(k => k.Expires < clock.GetCurrentInstant()).ExecuteDeleteAsync(ct);
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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, CancellationToken ct = default) where T : class =>
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SetKeyAsync(key, obj, clock.GetCurrentInstant() + expiresAt, ct);
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public async Task SetKeyAsync<T>(string key, T obj, Instant expires, CancellationToken ct = default) 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, ct);
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}
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public async Task<T?> GetKeyAsync<T>(string key, bool delete = false, CancellationToken ct = default)
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where T : class
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{
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var value = await GetKeyAsync(key, delete, ct);
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return value == null ? default : JsonConvert.DeserializeObject<T>(value);
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}
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} |