PiwigoDirectorySync/PiwigoDirectorySync/AppSettings.cs

using Microsoft.Extensions.Configuration;

namespace PiwigoDirectorySync;

internal static class AppSettings
{
    public static readonly IReadOnlySet<string> SupportedExtensions = new HashSet<string> { "jpg", "jpeg", "png" };

    public static IConfigurationRoot Config { get; } = new ConfigurationBuilder().SetBasePath(AppContext.BaseDirectory)
        .AddJsonFile("appsettings.json", true)
        .AddJsonFile(Path.Combine(Environment.CurrentDirectory, "appsettings.json"), true)
        .AddJsonFile("/etc/PiwigoDirectorySync/appsettings.json", true)
        .AddEnvironmentVariables()
        .Build();

    public static Settings Settings { get; } = Config.GetSection("settings").Get<Settings>() ?? throw new InvalidOperationException("Could not parse settings");

    public static string ConnectionString =>
        Config.GetConnectionString(Settings.DbProvider) ?? throw new InvalidOperationException($"Could not find connection string for provider {Settings.DbProvider}");
}