lighttroupe/luz

require 'user_object'

class EventInput < ChildUserObject
    attr_reader :current_value, :last_activation_time        # for use by plugins

    def self.new_renderer
        GuiUserObjectClassRenderer.new(self)
    end
    def new_renderer
        GuiEventInputRenderer.new(self)
    end

    def after_load
        set_default_instance_variables(:current_value => 0, :current_value_raw => false, :last_value => false, :last_activation_time => 0.0)
        super
    end

    def now?
        @current_value > 0
    end

    def last_value
        @current_value_raw
    end

    def previous_frame?
        @last_value
    end

    def time_since_last_activation
        $env[:time] - @last_activation_time
    end

    def do_value
        return 0 unless enabled?
        return @current_value if $env[:frame_number] == @last_resolve_frame_number

        @last_resolve_frame_number = $env[:frame_number]    # Do this first to avoid any possible recurrsion issues.
        @last_value = @current_value

        resolve_settings

        user_object_try {
            @current_value_raw = self.value
            @current_value = clean_value(@current_value_raw)
            @last_activation_time = $env[:time] if @current_value > 0
            return @current_value
        }
        0        # In case of exceptions
    end

    def changed?
        @current_value != @last_value
    end

private

    def clean_value(value)
        case value
        when true
            1
        when false
            0
        when Integer
            value
        else
            raise "Event Input plugins should return true, false, or an Integer (got: #{value.class})"
        end
    end
end