L001_tfl_api.rb

require "open-uri"
require "json"

class TflApi
  def initialize
    @url = "https://api.tfl.gov.uk/line/mode/tube,overground,dlr,tflrail/status".freeze
    retrieve_data
  end

  def retrieve_data
    opened = open(@url).read
    @data = JSON.parse(opened)
  end

  def extract_lines
    @data.map do |line|
      newHash = {
        name: line["name"],
        reason: line["lineStatuses"].first["reason"],
        severity: line["lineStatuses"].first["statusSeverityDescription"]
      }
    end
  end
end

# class Line
#   def initialize

#   end
# end

tfl = TflApi.new
p tfl.extract_lines.first