From: Adam Akhtar <adamtemporary@...>
Date: 2008-11-11T18:53:36+09:00
Subject: Re: implementing mvc - using observer pattern - beginner to OOP

Hi thanks for the replies. I looked into MVC and i think its proably 
overkill for what im doing and probably stretching my abilities too far 
at this stage though does look like a good pattern. One think I dont 
understand is what the controller would actually do in my case where im 
just using the command line. I feel like i only need a model and then a 
view/controller wrapped into one.

Well ive decided to just scrap mvc and just get the thing working. I 
created two classes. One is a database class which wraps up kirbybase (a 
flat file db plugin for ruby) and the second is basically the U.I i.e. 
menu logic, getting input and presenting menus and stuff.

Im just not sure how to code their communication to each other.

class DB
..
..

def insert (task)
...
#some kirybbase calls here.
..
end

end


class UI

blahblahblah

def menu
puts "|A| to add a task"
...
...
end

def navigation
menu
input = gets.chomp
case input
when "A"
add task
etc
etc
etc
end




def add_task
new_task = new_task_form
add_task_to_db(new_task)
end

def add_task_to_db(new_task)
**what goes here?
end

def new_task_form
puts "Enter title for task"
new_task = Task.new
new_task.title = gets.chomp
return new_task
end

in add_task_to_db Im wondering the best way to pass the new_task 
completed in the UI object over to my db object. Is there someway to let 
the db class see the value of new_task? Should i be using an observer 
pattern here? Should they be observing one another (if possible?)?

Im probably overlooking somthing dead simple here but im way confused.

any help most appreciated.



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