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module StateManager
# State helper methods. Examples:
#
# @post.event! # send_event! :event
# @post.active? # in_state? :active
# @post.can_event? # respond_to_event? :event
#
module Helpers
module Methods
def self.define_methods(specification, target_class, property)
self.define_methods_helper(specification, target_class, [], property)
end
def self.define_methods_helper(specification, target_class, name_parts, property)
sm_proc = Proc.new do
self.send "#{property}_manager"
end
specification.events.each do |name, event|
target_class.send :define_method, "#{name.to_s}!" do | *args |
state_manager = instance_eval &sm_proc
state_manager.send_event! name, *args
end
target_class.send :define_method, "can_#{name.to_s}?" do
state_manager = instance_eval &sm_proc
state_manager.respond_to_event?(name)
end
end
specification.states.each do |name, child_class|
state_name_parts = name_parts.dup << name
method = state_name_parts.join('_')
path = state_name_parts.join('.')
target_class.send :define_method, "#{method}?" do
state_manager = instance_eval &sm_proc
state_manager.in_state?(path)
end
define_methods_helper(child_class.specification, target_class, state_name_parts, property)
end
end
end
end
end
Version data entries
18 entries across 18 versions & 1 rubygems