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cli-old/lib/obredux.rb
2017-07-28 02:34:58 +00:00

43 lines
744 B
Ruby

# frozen_string_literal: true
module Obredux
UNDEFINED = Object.new.freeze
class Action; end
class Init < Action; end
class Store
attr_reader :reducer_klass, :state
def initialize(reducer_klass)
@reducer_klass = reducer_klass
@state = UNDEFINED
dispatch Init.new
end
def dispatch(action)
@state = reducer_klass.new(state, action).call
end
end
class Reducer
def initialize(state, action)
@state = state
@action = action
end
def call
@state = initial_state if state.equal? UNDEFINED
reduce
end
private
attr_reader :state, :action
def initial_state
raise NotImplementedError, "#{self.class}#initial_state"
end
end
end