lighttroupe/luz

require 'conditions'

=begin
    Child Index:
        ( ) Every Nth [2 ⟠] Starting at [0 ⟠]
        [ ] Invert

    Event:
        ( ) When [event ⟠] () is on () is off

    Context:
        ( ) Always
        ( ) Studio
        ( ) Performance
=end

class ChildConditions < Conditions
    attr_accessor :event, :child_index_min, :child_index_max
    boolean_accessor :enable_child_index, :enable_event, :event_invert

    def to_yaml_properties
        super + ['@enable_child_index', '@child_index_min', '@child_index_max', '@enable_event', '@event', '@event_invert']
    end

    def initialize
        after_load
    end

    def after_load
        set_default_instance_variables(:enable_child_index => false, :child_index_min => 0, :child_index_max => 0, :enable_event => false, :event => nil, :event_invert => false)
    end

    #
    # When conditions are satisfied, object can be used normally.
    #
    def satisfied?
        event_satisfied? && child_index_satisfied?
    end

    def child_index_satisfied?
        @enable_child_index == false || ($env[:child_index] >= @child_index_min && $env[:child_index] <= @child_index_max)
    end

    def event_satisfied?
        @enable_event == false || @event.nil? || (@event.now? == (@event_invert ? false : true))        # to deal with possible nil (no after_creation method for non userobjects :/)
    end

    def child_number_min
        @child_index_min + 1
    end
    def child_number_min=(num)
        @child_index_min = num - 1
        @child_index_max = @child_index_min if @child_index_min > @child_index_max
    end

    def child_number_max
        @child_index_max + 1
    end
    def child_number_max=(num)
        @child_index_max = num - 1
        @child_index_min = @child_index_max if @child_index_min > @child_index_max
    end
end