recyclarr/src/TrashLib/Services/Common/QualityDefinition/QualityGuideParser.cs

using System.IO.Abstractions;
using Common.Extensions;
using Newtonsoft.Json;
using Newtonsoft.Json.Serialization;
using Serilog;

namespace TrashLib.Services.Common.QualityDefinition;

internal class QualityGuideParser<T> where T : class
{
    private readonly ILogger _log;

    public QualityGuideParser(ILogger log)
    {
        _log = log;
    }

    public ICollection<T> GetQualities(IEnumerable<IDirectoryInfo> jsonDirectories)
    {
        return jsonDirectories
            .SelectMany(x => x.GetFiles("*.json"))
            .Select(ParseQuality)
            .NotNull()
            .ToList();
    }

    private T? ParseQuality(IFileInfo jsonFile)
    {
        var serializer = JsonSerializer.Create(new JsonSerializerSettings
        {
            ContractResolver = new DefaultContractResolver
            {
                NamingStrategy = new SnakeCaseNamingStrategy()
            }
        });

        using var json = new JsonTextReader(jsonFile.OpenText());
        var quality = serializer.Deserialize<T>(json);
        if (quality is null)
        {
            _log.Debug("Failed to parse quality definition JSON file: {Filename}", jsonFile.FullName);
        }

        return quality;
    }
}