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CommandInvoker.cs
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CommandInvoker.cs
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using System;
using System.Collections.Generic;
using Nasa.MarsRover.LandingSurface;
using Nasa.MarsRover.Rovers;
namespace Nasa.MarsRover.Command
{
public class CommandInvoker : ICommandInvoker
{
private readonly Func<IRover> roverFactory;
private readonly IDictionary<CommandType, Action<ICommand>> setReceiversMethodDictionary;
private ILandingSurface landingSurface;
private IList<IRover> rovers;
private IEnumerable<ICommand> commandList;
public CommandInvoker(Func<IRover> aRoverFactory)
{
roverFactory = aRoverFactory;
setReceiversMethodDictionary = new Dictionary<CommandType, Action<ICommand>>
{
{CommandType.LandingSurfaceSizeCommand, SetReceiversOnLandingSurfaceSizeCommand},
{CommandType.RoverDeployCommand, SetReceiversOnRoverDeployCommand},
{CommandType.RoverExploreCommand, SetReceiversOnRoverExploreCommand}
};
}
public void SetLandingSurface(ILandingSurface aLandingSurface)
{
landingSurface = aLandingSurface;
}
public void SetRovers(IList<IRover> someRovers)
{
rovers = someRovers;
}
public void Assign(IEnumerable<ICommand> aCommandList)
{
commandList = aCommandList;
}
public void InvokeAll()
{
foreach (var command in commandList)
{
setReceivers(command);
command.Execute();
}
}
private void setReceivers(ICommand command)
{
setReceiversMethodDictionary[command.GetCommandType()]
.Invoke(command);
}
private void SetReceiversOnLandingSurfaceSizeCommand(ICommand command)
{
var landingSurfaceSizeCommand = (ILandingSurfaceSizeCommand) command;
landingSurfaceSizeCommand.SetReceiver(landingSurface);
}
private void SetReceiversOnRoverDeployCommand(ICommand command)
{
var roverDeployCommand = (IRoverDeployCommand) command;
var newRover = roverFactory();
rovers.Add(newRover);
roverDeployCommand.SetReceivers(newRover, landingSurface);
}
private void SetReceiversOnRoverExploreCommand(ICommand command)
{
var roverExploreCommand = (IRoverExploreCommand) command;
var latestRover = rovers[rovers.Count - 1];
roverExploreCommand.SetReceiver(latestRover);
}
}
}