96 lines
2.7 KiB
C#
96 lines
2.7 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(
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string key,
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string value,
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Duration expireAfter,
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CancellationToken ct = default
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) => SetKeyAsync(key, value, clock.GetCurrentInstant() + expireAfter, ct);
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public async Task SetKeyAsync(
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string key,
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string value,
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Instant expires,
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CancellationToken ct = default
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)
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{
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db.TemporaryKeys.Add(
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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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);
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await db.SaveChangesAsync(ct);
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}
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public async Task<string?> GetKeyAsync(
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string key,
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bool delete = false,
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CancellationToken ct = default
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)
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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)
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return null;
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if (delete)
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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
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.TemporaryKeys.Where(k => k.Expires < clock.GetCurrentInstant())
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.ExecuteDeleteAsync(ct);
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if (count != 0)
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_logger.Information("Removed {Count} expired keys from the database", count);
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}
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public Task SetKeyAsync<T>(
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string key,
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T obj,
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Duration expiresAt,
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CancellationToken ct = default
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)
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where T : class => SetKeyAsync(key, obj, clock.GetCurrentInstant() + expiresAt, ct);
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public async Task SetKeyAsync<T>(
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string key,
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T obj,
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Instant expires,
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CancellationToken ct = default
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)
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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>(
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string key,
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bool delete = false,
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CancellationToken ct = default
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)
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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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}
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