class Holidays::Definition::Context::Load

def call(region)
  region_definition_file = "#{@full_definitions_path}/#{region}"
  require region_definition_file
  target_region_module = Module.const_get("Holidays").const_get(region.upcase)
  @definition_merger.call(
    region,
    target_region_module.holidays_by_month,
    target_region_module.custom_methods,
  )
  target_region_module.defined_regions
rescue  NameError, LoadError => e
  raise UnknownRegionError.new(e), "Could not load region prefix: #{region.to_s}"
end

def initialize(definition_merger, full_definitions_path)
  @definition_merger = definition_merger
  @full_definitions_path = full_definitions_path
end