hrynco-common/HrynCo.Common/ConfigurationFactory.cs

namespace HrynCo.Common;

using Microsoft.Extensions.Configuration;

public static class ConfigurationFactory
{
    /// <summary>
    ///     Use for .NET Core Console applications.
    /// </summary>
    public static IConfigurationRoot CreateConfiguration()
    {
        return CreateConfiguration(AppContext.BaseDirectory);
    }

    public static IConfigurationRoot CreateConfiguration(string basePath)
    {
        string environmentName = Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT") ?? "Production";
        return CreateConfiguration(basePath, environmentName);
    }

    public static IConfigurationRoot CreateConfiguration(string basePath, string environmentName)
    {
        if (!Directory.Exists(basePath))
        {
            throw new DirectoryNotFoundException(
                $"Directory {basePath} does not exist. Wrong value of the {nameof(basePath)} parameter.");
        }

        return new ConfigurationBuilder()
            .SetBasePath(basePath)
            .AddJsonFile("appsettings.json", false, true)
            .AddJsonFile($"appsettings.{environmentName}.json", true, true)
            .AddJsonFile("local.settings.json", true)
            .AddEnvironmentVariables()
            .Build();
    }
}