Class: James::Conversation

Inherits:
Object
  • Object
show all
Defined in:
lib/james/conversation.rb

Overview

A conversation has a number of markers (position in dialog), whose dialogs are visited in order of preference.

Why? Conversations have multiple points where they can be. (Politics, then this joke, then back again, finally “Oh, bye I have to go!”)

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(initial) ⇒ Conversation

A Conversation keeps a stack of markers with an initial one.



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# File 'lib/james/conversation.rb', line 17

def initialize initial
  @markers = [initial]
end

Instance Attribute Details

#markers ⇒ Object

Returns the value of attribute markers.



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# File 'lib/james/conversation.rb', line 12

def markers
  @markers
end

Instance Method Details

#enter ⇒ Object

Enter enters the first visitor.



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# File 'lib/james/conversation.rb', line 44

def enter
  markers.first.enter
end

#expects ⇒ Object

Simply returns the sum of what phrases all dialogs do expect, front-to-back.

Stops as soon as a marker is not on a chainable state anymore.



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# File 'lib/james/conversation.rb', line 52

def expects
  markers.inject([]) do |expects, marker|
    total = marker.expects + expects
    break total unless marker.chainable?
    total
  end
end

#hear(phrase, &block) ⇒ Object

Hear tries all visitors in order until one hears a phrase he knows.

If a dialog boundary has been crossed: A new visitor is added with the target state of that heard phrase at the position.

After that, all remaining visitors are removed from the current stack (since we are obviously not in one of the later dialogs anymore).



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# File 'lib/james/conversation.rb', line 33

def hear phrase, &block
  self.markers = markers.inject([]) do |remaining, marker|
    markers = marker.hear phrase, &block
    remaining = remaining + markers
    break remaining if remaining.last && remaining.last.current?
    remaining
  end
end