mirror of
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98 lines
2.7 KiB
Ruby
98 lines
2.7 KiB
Ruby
# frozen_string_literal: false
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# Provides the routine to export the collected VAT data to a CSV file.
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class VatExportService
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include ActionView::Helpers::NumberHelper
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attr_reader :encoding, :format, :separator, :date_format, :columns, :decimal_separator
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def initialize(columns, encoding: 'UTF-8', format: 'CSV', separator: ';')
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@encoding = encoding
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@format = format
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@separator = separator
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@decimal_separator = '.'
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@date_format = '%Y-%m-%d'
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@columns = columns
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end
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def set_options(decimal_separator: ',', date_format: '%d/%m/%Y', label_max_length: nil, export_zeros: nil)
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@decimal_separator = decimal_separator
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@date_format = date_format
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end
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def export(start_date, end_date, file)
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# build CSV content
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content = header_row
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invoices = Invoice.where('created_at >= ? AND created_at <= ?', start_date, end_date).order('created_at ASC')
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vat_totals = compute_vat_totals(invoices)
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content << generate_rows(vat_totals, start_date, end_date)
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# write content to file
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File.open(file, "w:#{encoding}") { |f| f.puts content.encode(encoding, invalid: :replace, undef: :replace) }
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end
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private
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def header_row
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row = ''
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columns.each do |column|
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row << I18n.t("vat_export.#{column}") << separator
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end
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"#{row}\n"
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end
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def generate_rows(vat_totals, start_date, end_date)
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rows = ''
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vat_totals.each do |rate, total|
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next if rate.zero?
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rows += "#{row(
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start_date,
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end_date,
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rate,
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total
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)}\n"
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end
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rows
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end
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def compute_vat_totals(invoices)
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vat_total = []
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service = VatHistoryService.new
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invoices.each do |i|
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Rails.logger.info "processing invoice #{i.id}..." unless Rails.env.test?
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vat_total.push service.invoice_vat(i)
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end
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vat_total.map(&:values).flatten.group_by { |tot| tot[:vat_rate] }.map { |k, v| [k, v.map { |t| t[:total_vat] }.reduce(:+)] }.to_h
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end
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# Generate a row of the export, filling the configured columns with the provided values
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def row(start_date, end_date, vat_rate, amount)
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row = ''
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columns.each do |column|
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case column
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when 'start_date'
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row << DateTime.parse(start_date).strftime(date_format)
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when 'end_date'
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row << DateTime.parse(end_date).strftime(date_format)
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when 'vat_rate'
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row << vat_rate.to_s
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when 'amount'
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row << format_number(amount / 100.0)
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else
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Rails.logger.warn "Unsupported column: #{column}"
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end
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row << separator
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end
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row
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end
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# Format the given number as a string, using the configured separator
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def format_number(num)
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number_to_currency(num, unit: '', separator: decimal_separator, delimiter: '', precision: 2)
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end
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end
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