recyclarr/src/Common/ResourceDataReader.cs

using System;
using System.IO;
using System.Reflection;
using System.Text;

namespace Common;

public class ResourceDataReader
{
    private readonly Assembly? _assembly;
    private readonly string? _namespace;
    private readonly string _subdirectory;

    public ResourceDataReader(Type typeWithNamespaceToUse, string subdirectory = "")
    {
        _subdirectory = subdirectory;
        _namespace = typeWithNamespaceToUse.Namespace;
        _assembly = Assembly.GetAssembly(typeWithNamespaceToUse);
    }

    public string ReadData(string filename)
    {
        var nameBuilder = new StringBuilder();
        nameBuilder.Append(_namespace);
        if (!string.IsNullOrEmpty(_subdirectory))
        {
            nameBuilder.Append($".{_subdirectory}");
        }

        nameBuilder.Append($".{filename}");

        var resourceName = nameBuilder.ToString();
        using var stream = _assembly?.GetManifestResourceStream(resourceName);
        if (stream == null)
        {
            throw new ArgumentException($"Embedded resource not found: {resourceName}");
        }

        using var reader = new StreamReader(stream);
        return reader.ReadToEnd();
    }
}