sharee.bike-App/TINKLib/Model/Bikes/BikeCollection.cs

using System;
using System.Collections;
using System.Collections.Generic;

using System.Linq;

using BikeInfo = TINK.Model.Bikes.BikeInfoNS.BC.BikeInfo;

namespace TINK.Model.Bikes
{
	public class BikeCollection : IBikeDictionary<BikeInfo>
	{
		/// <summary> Holds the bike dictionary object.</summary>
		private Dictionary<string, BikeInfo> BikeDictionary { get; }

		/// <summary>Constructs an empty bike info dictionary object.</summary>
		public BikeCollection()
		{
			BikeDictionary = new Dictionary<string, BikeInfo>();
		}

		/// <summary> Constructs a bike collection object.</summary>
		/// <param name="bikeDictionary"></param>
		public BikeCollection(Dictionary<string, BikeInfo> bikeDictionary)
		{
			BikeDictionary = bikeDictionary ??
				throw new ArgumentNullException(nameof(bikeDictionary), "Can not construct BikeCollection object.");
		}

		/// <summary> Gets a bike by its id.</summary>
		/// <param name="id">Id of the bike to get.</param>
		/// <returns></returns>
		public BikeInfo GetById(string id)
		{
			return BikeDictionary.FirstOrDefault(x => x.Key == id).Value;
		}

		/// <summary> Gets the count of bikes. </summary>
		public int Count => BikeDictionary.Count;

		/// <summary> Gets if a bike with given id exists.</summary>
		/// <param name="id">Id of bike.</param>
		/// <returns>True if bike is contained, false otherwise.</returns>
		public bool ContainsKey(string id) => BikeDictionary.Keys.Contains(id);

		/// <summary> Gets the enumerator. </summary>
		/// <returns>Enumerator object.</returns>
		public IEnumerator<BikeInfo> GetEnumerator() => BikeDictionary.Values.GetEnumerator();

		/// <summary> Gets the enumerator. </summary>
		/// <returns>Enumerator object.</returns>
		IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
	}
}