1# frozen_string_literal: true
 2
 3require_relative "sim_pricing"
 4
 5module MonthlyDataLimit
 6	MAX_MULTIPLIER = 10
 7
 8	def self.for_sims(sims, currency, config)
 9		sims.empty? ? {} : for_currency(currency, config)
10	end
11
12	def self.for_currency(currency, config)
13		step = SIMPricing.five_gb_refill_price(currency, config).ceil
14		{
15			step: step,
16			max: step * MAX_MULTIPLIER
17		}
18	end
19
20	def self.from_form(form, step:, max:)
21		limit = form.field("monthly_data_limit")&.value
22		return if limit.to_s.empty?
23
24		parse(limit, step: step, max: max)
25	end
26
27	def self.parse(limit, step:, max:)
28		limit = Integer(limit, 10)
29		unless (0..max).cover?(limit)
30			raise "Monthly data limit must be between 0 and #{max}"
31		end
32		unless (limit % step).zero?
33			raise "Monthly data limit must be a multiple of #{step}"
34		end
35
36		limit
37	end
38end