# frozen_string_literal: true

require 'nokogiri'
require_relative './event'
require_relative './updated'

module ForwardCalendar
  class ForwardCalendar
    def initialize(file)
      @file = file
    end

    ##
    # Immidiately returns the Updated element as soon as it gets parsed.
    # (Avoids the complete traverse of the file if the Updated element is set
    # at the beggining of the file)
    #
    def updated
      Nokogiri::XML::Reader(@file).each do |node|
        next unless node.name == 'updated' && node.node_type == Nokogiri::XML::Reader::TYPE_ELEMENT
        return Updated.parse(Nokogiri::XML(node.outer_xml), single: true)
      end
    end

    ##
    # Yields each Event from the Snapshot file being parsed.
    #
    def each_event
      Nokogiri::XML::Reader(@file).each do |node|
        next unless node.name == 'event' && node.node_type == Nokogiri::XML::Reader::TYPE_ELEMENT
        parsed_event = Nokogiri::XML.parse(node.outer_xml).remove_namespaces!
        yield Event.parse(parsed_event, single: true)
      end
    end
  end
end