Class: CoinTools::CoinCap

Inherits:
Object
  • Object
show all
Defined in:
lib/cointools/coincap.rb

Defined Under Namespace

Classes: BadRequestException, DataPoint, InvalidDateException, InvalidResponseException

Constant Summary collapse

BASE_URL = 
"https://coincap.io"
USER_AGENT = 
"cointools/#{CoinTools::VERSION}"
PERIODS = 
[1, 7, 30, 90, 180, 365]

Instance Method Summary collapse

Instance Method Details

#get_current_price(symbol) ⇒ Object 



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# File 'lib/cointools/coincap.rb', line 65

def get_current_price(symbol)
  url = URI("#{BASE_URL}/page/#{symbol.upcase}")

  response = make_request(url)

  case response
  when Net::HTTPSuccess
    json = JSON.load(response.body)

    usd_price = json['price_usd']
    eur_price = json['price_eur']
    btc_price = json['price_btc']

    return DataPoint.new(nil, usd_price, eur_price, btc_price)
  when Net::HTTPBadRequest
    raise BadRequestException.new(response)
  else
    raise InvalidResponseException.new(response)
  end
end

#get_price(symbol, time = nil) ⇒ Object 



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# File 'lib/cointools/coincap.rb', line 31

def get_price(symbol, time = nil)
  return get_current_price(symbol) if time.nil?

  (time <= Time.now) or raise InvalidDateException.new('Future date was passed')
  (time.year >= 2009) or raise InvalidDateException.new('Too early date was passed')

  period = period_for_time(time)

  if period
    url = URI("#{BASE_URL}/history/#{period}day/#{symbol.upcase}")
  else
    url = URI("#{BASE_URL}/history/#{symbol.upcase}")
  end

  unixtime = time.to_i

  response = make_request(url)

  case response
  when Net::HTTPSuccess
    json = JSON.load(response.body)
    data = json['price']

    timestamp, price = best_matching_record(data, unixtime)
    actual_time = Time.at(timestamp / 1000)

    return DataPoint.new(actual_time, price, nil, nil)
  when Net::HTTPBadRequest
    raise BadRequestException.new(response)
  else
    raise InvalidResponseException.new(response)
  end
end