63 lines
1.8 KiB
Ruby
63 lines
1.8 KiB
Ruby
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# frozen_string_literal: true
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require "net/http"
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require "ox"
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require "provider/adapters/adapter"
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class Provider
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module Adapters
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# National Bank of Romania. Publishes daily reference rates for ~35
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# currencies against the Romanian leu (RON). Yearly XML archives back to
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# 2005 are kept current within the year. The 10-day feed is a redundant
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# window over the same data, so we always use the yearly archive.
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class BNR < Adapter
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BASE_URL = "https://www.bnr.ro"
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class << self
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def backfill_range = 365
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end
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def fetch(after: nil, upto: nil)
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end_date = upto || Date.today
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records = if after.nil? || after.year == end_date.year
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fetch_year(after&.year || end_date.year)
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else
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(after.year..end_date.year).flat_map { |year| fetch_year(year) }
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end
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records.select { |r| (after.nil? || r[:date] > after) && r[:date] <= end_date }
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end
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def parse(xml)
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doc = Ox.load(xml)
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doc.locate("DataSet/Body/Cube").flat_map do |cube|
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date = Date.parse(cube[:date])
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cube.locate("Rate").filter_map do |rate_node|
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currency = rate_node[:currency]
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next unless currency&.match?(/\A[A-Z]{3}\z/)
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multiplier = rate_node[:multiplier]&.to_i || 1
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rate_value = Float(rate_node.text, exception: false)
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next unless rate_value
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rate_value /= multiplier if multiplier > 1
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rate_value *= GRAMS_PER_TROY_OUNCE if currency == "XAU"
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next if rate_value.zero?
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{ date:, base: currency, quote: "RON", rate: rate_value }
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end
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end
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end
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private
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def fetch_year(year)
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parse(Net::HTTP.get(URI("#{BASE_URL}/files/xml/years/nbrfxrates#{year}.xml")))
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end
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end
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end
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end
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