dpot-backend/Infrastructure/Cache/RedisCacheService.cs

using Application.Abstractions.Cache;
using StackExchange.Redis;
using System.Text.Json;

namespace Infrastructure.Cache;

public sealed class RedisCacheService(IConnectionMultiplexer redis) : ICacheService
{
    private readonly IDatabase _db = redis.GetDatabase();

    private static readonly JsonSerializerOptions _jsonOptions = new()
    {
        PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
        WriteIndented = false
    };

    public async Task<T?> GetAsync<T>(string key, CancellationToken ct = default)
    {
        var value = await _db.StringGetAsync(key);
        if (value.IsNullOrEmpty)
        {
            return default;
        }

        return JsonSerializer.Deserialize<T>((string)value!, _jsonOptions);
    }

    public async Task SetAsync<T>(string key, T value, CancellationToken ct = default)
    {
        await _db.StringSetAsync(key, JsonSerializer.Serialize(value, _jsonOptions));
    }

    public async Task SetAsync<T>(string key, T value, TimeSpan expiry, CancellationToken ct = default)
    {
        await _db.StringSetAsync(key, JsonSerializer.Serialize(value, _jsonOptions), expiry);
    }

    public async Task RemoveAsync(string key, CancellationToken ct = default)
    {
        await _db.KeyDeleteAsync(key);
    }

    public async Task RemoveByPrefixAsync(string prefix, CancellationToken ct = default)
    {
        var server = redis.GetServer(_db.Multiplexer.GetEndPoints().First());
        var keys = server.Keys(pattern: $"{prefix}*").ToArray();

        if (keys.Length > 0)
        {
            await _db.KeyDeleteAsync(keys);
        }
    }
}