51 lines
1.2 KiB
Ruby
51 lines
1.2 KiB
Ruby
|
# frozen_string_literal: true
|
||
|
|
|
||
|
|
require "net/http"
|
||
|
|
require "oj"
|
||
|
|
|
||
|
|
require "provider/adapters/adapter"
|
||
|
|
|
||
|
|
class Provider
|
||
|
|
module Adapters
|
||
|
|
# National Bank of Ukraine. Publishes daily rates for ~45 currencies against UAH.
|
||
|
|
class NBU < Adapter
|
||
|
|
URL = URI("https://bank.gov.ua/NBU_Exchange/exchange_site")
|
||
|
|
|
||
|
|
class << self
|
||
|
|
def backfill_range = 365
|
||
|
|
end
|
||
|
|
|
||
|
|
def fetch(after: nil, upto: nil)
|
||
|
|
url = URL.dup
|
||
|
|
url.query = URI.encode_www_form(
|
||
|
|
start: after.strftime("%Y%m%d"),
|
||
|
|
end: (upto || Date.today).strftime("%Y%m%d"),
|
||
|
|
sort: "exchangedate",
|
||
|
|
order: "asc",
|
||
|
|
json: "",
|
||
|
|
)
|
||
|
|
|
||
|
|
parse(Net::HTTP.get(url))
|
||
|
|
end
|
||
|
|
|
||
|
|
def parse(json)
|
||
|
|
data = json.is_a?(String) ? Oj.load(json, mode: :strict) : json
|
||
|
|
|
||
|
|
data.filter_map do |row|
|
||
|
|
date = Date.strptime(row.fetch("exchangedate"), "%d.%m.%Y")
|
||
|
|
next if date.saturday? || date.sunday?
|
||
|
|
|
||
|
|
iso = row.fetch("cc")
|
||
|
|
next unless iso.match?(/\A[A-Z]{3}\z/)
|
||
|
|
|
||
|
|
units = row.fetch("units", 1).to_f
|
||
|
|
rate = row.fetch("rate").to_f
|
||
|
|
next if rate.zero? || units.zero?
|
||
|
|
|
||
|
|
{ date:, base: iso, quote: "UAH", rate: rate / units }
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|
||
|
|
end
|