/// <summary>
/// Returns the next arg
/// </summary>
/// <param name="request">The request.</param>
/// <returns>The next arg</returns>
/// <exception cref="ArgumentOutOfRangeException">
/// Max - Cannot get next arg because it is outside the range of consumable
/// values
/// </exception>
public static string Next(this ConsumptionRequest request)
{
if (request.Max < 2)
{
throw new ArgumentOutOfRangeException(nameof(request.Max),
"Cannot get next arg because it is outside the range of consumable values");
}
return(request.Info.Args[request.Info.Index + 1]);
}
/// <summary>
/// Gets the last arg allowed to be consumed
/// </summary>
/// <param name="request">The request.</param>
/// <returns>The last arg allowed to be consumed</returns>
/// <exception cref="ArgumentOutOfRangeException"></exception>
public static string Last(this ConsumptionRequest request)
{
var from = request.AllToBeConsumed().ToList();
if (!from.Any())
{
throw new ArgumentOutOfRangeException();
}
return(from.Last());
}
/// <summary>
/// Consumes the specified instance.
/// </summary>
/// <param name="instance">The instance.</param>
/// <param name="request">The request.</param>
/// <returns>ConsumptionResult.</returns>
/// <exception cref="MissingValueException"></exception>
public virtual ConsumptionResult Consume(object instance, ConsumptionRequest request)
{
try
{
if (request.Max < MinRequired)
{
throw new MissingValueException(Parser,
$"Switch {this} expected to have at least {MinRequired} values, but was told it can only have {request.Max}. Are you sure you passed enough values to satisfy the switch?");
}
HasBeenConsumed = true;
var values = request.AllToBeConsumed().Take(MaxAllowed).ToArray();
ConsumeCallback(instance, values);
return(new ConsumptionResult(request.Info, values.Length, this));
}
catch (ParseException pe)
{
return(new ConsumptionResult(pe));
}
}
/// <summary> /// Gets the rest of the args allowed to be consumed /// </summary> /// <param name="request">The request.</param> /// <returns>The rest of the args allowed to be consumed</returns> public static IEnumerable <string> Rest(this ConsumptionRequest request) => request.Info.Args.Skip(request.Info.Index + 1).Take(request.Max - 1);
/// <summary> /// Determines whether the specified request has a second argument. /// </summary> /// <param name="request">The request.</param> /// <returns><c>true</c> if the specified request has a second argument; otherwise, <c>false</c>.</returns> public static bool HasNext(this ConsumptionRequest request) => request.Info.Index + 1 < request.Info.Index + request.Max;
/// <summary> /// Returns all args to be consumed /// </summary> /// <param name="request">The request.</param> /// <returns>Args to be consumed</returns> public static IEnumerable <string> AllToBeConsumed(this ConsumptionRequest request) => request.Info.Args.Skip(request.Info.Index).Take(request.Max);
/// <summary>
/// Consumes the args and populate the provided instance
/// </summary>
/// <param name="instance">The instance.</param>
/// <param name="request">The request.</param>
/// <returns>ConsumptionResult.</returns>
public virtual ConsumptionResult Consume(object instance, ConsumptionRequest request)
{
var parameter = Parameters.First(x => x.CanConsume(instance, request.Info).Info != request.Info);
return(parameter.Consume(instance, request));
}
