using System.Collections.Generic;
using DHT.Server.Data;

namespace DHT.Server.Database {
	public static class DatabaseExtensions {
		public static void AddFrom(this IDatabaseFile target, IDatabaseFile source) {
			target.AddServers(source.GetAllServers());
			target.AddChannels(source.GetAllChannels());
			target.AddUsers(source.GetAllUsers().ToArray());
			target.AddMessages(source.GetMessages().ToArray());
			
			foreach (var download in source.GetDownloadsWithoutData()) {
				target.AddDownload(download.Status == DownloadStatus.Success ? source.GetDownloadWithData(download) : download);
			}
		}

		internal static void AddServers(this IDatabaseFile target, IEnumerable<Data.Server> servers) {
			foreach (var server in servers) {
				target.AddServer(server);
			}
		}

		internal static void AddChannels(this IDatabaseFile target, IEnumerable<Channel> channels) {
			foreach (var channel in channels) {
				target.AddChannel(channel);
			}
		}
	}
}