single responsibility principle

    public interface IFatController
    {
        bool IsAuthorised(string userName);
        void ExecuteCommand(string command);
        string QueryData(string query);
    }

    public interface IAuthorisationExpert
    {
        bool IsAuthorised(string userName);
    }
 
    public interface ICommand
    {
        void Execute();
    }
 
    public interface IQuery
    {
        string QueryData(string query);
    }

    public class OutOfControlController
    {
        public string DoStuff(int id, string command, string data)
        {
            if (Thread.CurrentPrincipal.Identity == null)
                throw new UnauthorizedAccessException();
 
            if (!Thread.CurrentPrincipal.IsInRole("Administrator"))
                throw new UnauthorizedAccessException();                
 
            if (command == "Update")
            {
                var response = Update(id, data);
 
                Cache(response);
 
                return response;
            }
 
            return null;
        }
 
        // Connects to database, finds record and updates it's data
        protected string Update(int id, string data)
  
        // Stores data in a cache
        protected void Cache(string data)
     }

    public class FocussedController
    {
        private readonly ISomeRepository _someRepository;
 
        [Authorize("Administator")]
        [CachableResponse]
        public string Update(int id, string data)
        {
            var response = _someRepository.Update(id, data);
 
            return response;
        }
    }

1. Get VS2010 + MVC4
2. Get the code: https://github.com/lyndsp/GOL-Katas
3. Get Fiddler or Chrome's REST Client App.
   
4. Build and run the code.

• POST creates a new civilisation.

• GET gets it's current state.

• PUT applies N evolutions to civilisation.

• Code has examples of requests.
  

• GET to api/civilisation/0 returns sample.

1. Fiddler - recording, filters, composer
   
2. Chrome's Advanced REST Client
   
3. Web API
   

1. Apply the SRP to the GenerationController.
   
2. Ensure tests all pass.
3. Ensure Post, Get and Put still work.

• Implement caching on the Get.
• Implement authorisation on all methods.
• Implement Civilisation.Evolve().

1. Work in pairs with a guide.
   
2. Apply SRP to either