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