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DSLs
class Adventure
attr_reader \
:current_room,
:rooms
class Room
attr_accessor \
:exits,
:long,
:short
def initialize( short , long , exits )
@short = short
@long = long
@exits = exits
end
def long( val = false )
if val
self.long = val
else
self.long
end
end
def short( val = false )
if val
self.short = val
else
self.short
end
end
def door(direction, destination, &block)
if exits.has_key?( direction )
puts "Error: Room #{@current_room} already has an exit defined in #{direction}"
else
exits[ direction ] = {:where => destination, :condition => block_given? ? block : true}
end
end
end
def initialize
@rooms = Hash.new
@current_room = nil
end
def room(reference, &block)
@current_room =
if @rooms.has_key?(reference)
puts "Error: Room #{reference} has already been defined"
@rooms[ reference ]
else
@rooms[ reference ] = Room.new '' , '' , Hash.new
end
@current_room.instance_eval( &block ) if block_given?
end
end
class Object
def adventure(&block)
a = Adventure.new
a.instance_eval( &block ) if block_given?
end
end
adventure do
room :cave do
short "You are in a large cave"
long "You are in a very large cave"
door :west, :another_cave
door :east, :exit do
if player.has_item(:key)
true
else
false
end
end
end
room :another_cave do
short "A cave"
long "Oh great ... another cave"
door :east, :cave
end
room :exit do
short "Freedom"
long "Freeeeeeeeeeedom!!!!!!"
door :west, :cave
end
require 'pp'
pp @rooms
end
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