70 lines
2 KiB
Ruby
70 lines
2 KiB
Ruby
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# frozen_string_literal: true
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require "net/http"
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require "oj"
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require "provider/adapters/adapter"
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class Provider
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module Adapters
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# Bank Al-Maghrib. Publishes daily mid-market rates for ~30 currencies against MAD.
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# Older data (pre-2016) lacks a mid-rate field; the adapter averages buy/sell.
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class BAM < Adapter
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URL = "https://api.centralbankofmorocco.ma/cours/Version1/api/CoursVirement"
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class << self
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def api_key = ENV["BAM_API_KEY"] || raise(Adapter::Unavailable, "no API key")
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def backfill_range = 7
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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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(after..end_date).each_with_object([]) do |date, dataset|
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next if date.saturday? || date.sunday?
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dataset.concat(fetch_date(date))
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end
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end
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def parse(json)
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data = json.is_a?(String) ? Oj.load(json, mode: :strict) : json
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return [] unless data.is_a?(Array)
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data.filter_map do |record|
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code = record["libDevise"]
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next unless code&.match?(/\A[A-Z]{3}\z/)
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date = Date.parse(record["date"])
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mid = record["moyen"]&.to_f || ((record["achat"].to_f + record["vente"].to_f) / 2).round(4)
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unite = record["uniteDevise"].to_f
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next if mid.zero? || unite.zero?
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{ date:, base: code, quote: "MAD", rate: mid / unite }
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end
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end
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private
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def fetch_date(date)
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uri = URI(URL)
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uri.query = URI.encode_www_form(date: "#{date.strftime("%Y-%m-%d")}T12:30:00")
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request = Net::HTTP::Get.new(uri)
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request["Ocp-Apim-Subscription-Key"] = self.class.api_key
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loop do
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response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) { |http| http.request(request) }
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if response.is_a?(Net::HTTPTooManyRequests)
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sleep(response["retry-after"].to_i)
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else
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sleep(1)
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response.value
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return parse(response.body)
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end
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end
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end
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end
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end
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end
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