class DateParamsValidator

# File app/lib/date_params_validator.rb, line 6
def initialize(field_name:, object:, params:)
  @field_name = field_name
  @object = object
  @params = params
end

# File app/lib/date_params_validator.rb, line 12
def date_params_as_struct
  date_params = [
    params["#{field_name}(1i)"],
    params["#{field_name}(2i)"],
    params["#{field_name}(3i)"]
  ]
  Struct.new(:year, :month, :day).new(*date_params)
end

# File app/lib/date_params_validator.rb, line 21
def date_params_valid?
  date = date_params_as_struct

  return true if [date.year, date.month, date.day].all?(&:blank?)

  if date.day.blank?
    object.errors.add(field_name, :missing_day)
  elsif date.month.blank?
    object.errors.add(field_name, :missing_month)
  elsif date.year.blank?
    object.errors.add(field_name, :missing_year)
  elsif date.year.to_i < 1000
    object.errors.add(field_name, :missing_year)
  else
    begin
      Date.new(date.year.to_i, date.month.to_i, date.day.to_i)
    rescue Date::Error
      object.errors.add(field_name, :blank)
    end
  end

  object.errors.none?
end