/// <summary>
/// Initializes a new instance of the <see cref="ContextCommand"/> class.
/// </summary>
/// <param name="commandScript">The command script.</param>
/// <param name="commandKey">The command key.</param>
/// <param name="availability">The availability.</param>
/// <param name="securityRole">The security role.</param>
public ContextCommand(
GameAction commandScript,
string commandKey,
ContextAvailability availability,
SecurityRole securityRole)
{
this.CommandScript = commandScript;
this.CommandKey = commandKey;
this.Availability = availability;
this.SecurityRole = securityRole;
}
/// <summary>Prepare for, and determine if the command's prerequisites have been met.</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;
string commonFailure = VerifyCommonGuards(actionInput, ActionGuards);
if (commonFailure != null)
{
return(commonFailure);
}
// Check to see if the first word is a number.
// If so, shunt up the positions of our other params.
int itemParam = 0;
int numberWords = actionInput.Params.Length;
if (int.TryParse(actionInput.Params[0], out this.numberToGive))
{
itemParam = 1;
// If the user specified a number, but it is less than 1, error!
if (this.numberToGive < 1)
{
return("You can't give less than 1 of something.");
}
// Rule: We should now have at least 3 items in our words array.
// (IE "give 10 coins to Karak" or "give 10 coins Karak")
if (numberWords < 3)
{
return("You must specify something to give, and a target.");
}
}
// The next parameter should be the item name (possibly pluralized).
string itemName = actionInput.Params[itemParam];
// Do we have an item matching the name in our inventory?
this.thing = sender.Thing.FindChild(itemName.ToLower());
if (this.thing == null)
{
return("You do not hold " + itemName + ".");
}
// The final argument should be the target name.
string targetName = actionInput.Params[actionInput.Params.Length - 1];
// Rule: Do we have a target?
if (string.IsNullOrEmpty(targetName))
{
return("You must specify someone to give that to.");
}
// @@@ Shared targeting code should be used, and this rule should be implemented like:
// if (this.target == sender.Thing) ...
// Rule: The giver cannot also be the receiver.
if (targetName == "me")
{
return("You can't give something to yourself.");
}
// Rule: Is the target an entity?
this.target = GameAction.GetPlayerOrMobile(targetName);
if (this.target == null)
{
return("You cannot see " + targetName + ".");
}
// Rule: Is the target in the same room?
if (sender.Thing.Parent.ID != this.target.Parent.ID)
{
return("You cannot see " + targetName + ".");
}
// Rule: The thing being given must be movable.
this.movableBehavior = this.thing.Behaviors.FindFirst <MovableBehavior>();
return(null);
}