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fab-manager/app/services/vat_history_service.rb

48 lines
1.6 KiB
Ruby

# frozen_string_literal: true
# Provides the VAT rate in use at the given date
class VatHistoryService
# return the VAT rate for the given Invoice/Avoir
def invoice_vat(invoice)
if invoice.is_a?(Avoir)
vat_rate(invoice.avoir_date)
else
vat_rate(invoice.created_at)
end
end
# return the VAT rate for the given date
def vat_rate(date)
@vat_rates = vat_history if @vat_rates.nil?
first_rate = @vat_rates.first
return first_rate[:rate] if date < first_rate[:date]
@vat_rates.each_index do |i|
return @vat_rates[i][:rate] if date >= @vat_rates[i][:date] && (@vat_rates[i + 1].nil? || date < @vat_rates[i + 1][:date])
end
end
private
def vat_history
chronology = []
end_date = DateTime.current
Setting.find_by(name: 'invoice_VAT-active').history_values.order(created_at: 'DESC').each do |v|
chronology.push(start: v.created_at, end: end_date, enabled: v.value == 'true')
end_date = v.created_at
end
chronology.push(start: DateTime.new(0), end: end_date, enabled: false)
date_rates = []
Setting.find_by(name: 'invoice_VAT-rate').history_values.order(created_at: 'ASC').each do |rate|
range = chronology.select { |p| rate.created_at.to_i.between?(p[:start].to_i, p[:end].to_i) }.first
date = range[:enabled] ? rate.created_at : range[:end]
date_rates.push(date: date, rate: rate.value.to_i)
end
chronology.reverse_each do |period|
date_rates.push(date: period[:start], rate: 0) unless period[:enabled]
end
date_rates.sort_by { |k| k[:date] }
end
end