/// <summary>Checks against the guards for the command.</summary>
/// <param name="actionInput">The full input specified for executing the command.</param>
/// <returns>A string with the error message for the user upon guard failure, else null.</returns>
public override string Guards(ActionInput actionInput)
{
IController sender = actionInput.Controller;
Thing wielder = sender.Thing;
Thing room = wielder.Parent;
string commonFailure = VerifyCommonGuards(actionInput, ActionGuards);
if (commonFailure != null)
{
return commonFailure;
}
string itemName = actionInput.Tail.Trim().ToLower();
// First look for a matching item in inventory and make sure it can
// be wielded. If nothing was found in inventory, look for a matching
// wieldable item in the surrounding environment.
this.itemToUnwield = wielder.FindChild(item => item.Name.ToLower() == itemName && item.HasBehavior<WieldableBehavior>() && item.Behaviors.FindFirst<WieldableBehavior>().Wielder == sender.Thing);
if (this.itemToUnwield == null)
{
this.itemToUnwield = wielder.Parent.FindChild(item => item.Name.ToLower() == itemName && item.HasBehavior<WieldableBehavior>() && item.Behaviors.FindFirst<WieldableBehavior>().Wielder == sender.Thing);
}
if (this.itemToUnwield == null)
{
return "You are not wielding the " + itemName + ".";
}
this.itemToUnwieldBehavior = this.itemToUnwield.Behaviors.FindFirst<WieldableBehavior>();
return null;
}
/// <summary>Checks against the guards for the command.</summary>
/// <param name="actionInput">The full input specified for executing the command.</param>
/// <returns>A string with the error message for the user upon guard failure, else null.</returns>
public override string Guards(ActionInput actionInput)
{
string commonFailure = VerifyCommonGuards(actionInput, ActionGuards);
if (commonFailure != null)
{
return commonFailure;
}
IController sender = actionInput.Controller;
Thing wielder = sender.Thing;
Thing room = wielder.Parent;
string itemName = actionInput.Tail.Trim().ToLower();
// First look for a matching item in inventory and make sure it can
// be wielded. If nothing was found in inventory, look for a matching
// wieldable item in the surrounding environment.
Thing itemInInventory = wielder.FindChild(itemName);
if (itemInInventory != null)
{
this.itemToWieldBehavior = itemInInventory.Behaviors.FindFirst<WieldableBehavior>();
// Item was found in inventory, but it cannot be wielded.
if (this.itemToWieldBehavior == null)
{
return "This item cannot be wielded!";
}
this.itemToWield = itemInInventory;
}
else
{
Thing itemInRoom = room.FindChild(itemName);
// Item was not found in inventory or the room.
if (itemInRoom == null)
{
return "Unable to find: " + itemName;
}
this.itemToWieldBehavior = itemInRoom.Behaviors.FindFirst<WieldableBehavior>();
// Item was found in the room, but it cannot be wielded.
if (this.itemToWieldBehavior == null)
{
return "This item cannot be wielded!";
}
// Item was found in the room, but it must be picked up first.
if (this.itemToWieldBehavior.MustBeHeld)
{
return "You are not holding the " + itemInRoom.FullName + ".";
}
this.itemToWield = itemInRoom;
}
// Make sure the item is not already wielded by someone else.
// This shouldn't happen (famous last words) if the item is in
// inventory, but it could happen with stationary wieldable items
// in the room.
if (this.itemToWieldBehavior.Wielder != null)
{
return string.Format("The {0} is already wielded by {1}.", this.itemToWield.Name, this.itemToWieldBehavior.Wielder.FullName);
}
return null;
}