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AppSettings.cs

using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

namespace Nop.Core.Configuration;

/// <summary>
/// Represents the app settings
/// </summary>
public partial class AppSettings
{
    #region Fields

    protected readonly Dictionary<Type, IConfig> _configurations;

    #endregion

    #region Ctor

    public AppSettings(IList<IConfig> configurations = null)
    {
        _configurations = configurations
                              ?.OrderBy(config => config.GetOrder())
                              ?.ToDictionary(config => config.GetType(), config => config)
                          ?? new Dictionary<Type, IConfig>();
    }

    #endregion
        
    #region Methods

    /// <summary>
    /// Get configuration parameters by type
    /// </summary>
    /// <typeparam name="TConfig">Configuration type</typeparam>
    /// <returns>Configuration parameters</returns>
    public virtual TConfig Get<TConfig>() where TConfig : class, IConfig
    {
        if (_configurations[typeof(TConfig)] is not TConfig config)
            throw new NopException($"No configuration with type '{typeof(TConfig)}' found");

        return config;
    }

    /// <summary>
    /// Update app settings
    /// </summary>
    /// <param name="configurations">Configurations to update</param>
    public virtual void Update(IList<IConfig> configurations)
    {
        foreach (var config in configurations)
        {
            _configurations[config.GetType()] = config;
        }
    }

    #endregion

    #region Properties

    /// <summary>
    /// Gets or sets raw configuration parameters
    /// </summary>
    [JsonExtensionData]
    public Dictionary<string, JToken> Configuration { get; set; }

    #endregion
}