Class: CoinTools::CoinMarketCap

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

Defined Under Namespace

Classes: CoinData, Listing

Constant Summary collapse

BASE_URL = 
"https://api.coinmarketcap.com"
FIAT_CURRENCIES = 
[
  'AUD', 'BRL', 'CAD', 'CHF', 'CLP', 'CNY', 'CZK', 'DKK', 'EUR', 'GBP',
  'HKD', 'HUF', 'IDR', 'ILS', 'INR', 'JPY', 'KRW', 'MXN', 'MYR', 'NOK',
  'NZD', 'PHP', 'PKR', 'PLN', 'RUB', 'SEK', 'SGD', 'THB', 'TRY', 'TWD',
  'ZAR'
]

Instance Method Summary collapse

Instance Method Details

#get_all_prices(convert_to: nil, &block) ⇒ Object 



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# File 'lib/cointools/coinmarketcap.rb', line 170

def get_all_prices(convert_to: nil, &block)
  url = URI("#{BASE_URL}/v2/ticker/?structure=array&sort=id&limit=100")

  if convert_to
    validate_fiat_currency(convert_to)
    url.query += "&convert=#{convert_to.upcase}"
  else
    url.query += "&convert=BTC"
  end

  coins = []

  loop do
    new_batch = fetch_full_ticker_page(url, convert_to, coins.length + 1, &block)

    if new_batch.empty?
      break
    else
      coins.concat(new_batch)
    end
  end

  coins.sort_by(&:rank)
end

#get_price(coin_name, convert_to: nil) ⇒ Object

Raises:



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# File 'lib/cointools/coinmarketcap.rb', line 119

def get_price(coin_name, convert_to: nil)
  raise InvalidSymbolError if coin_name.to_s.empty?

  validate_fiat_currency(convert_to) if convert_to

  listing = id_map[coin_name.to_s]
  raise InvalidSymbolError if listing.nil?

  get_price_for_listing(listing, convert_to: convert_to)
end

#get_price_by_symbol(coin_symbol, convert_to: nil) ⇒ Object

Raises:



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# File 'lib/cointools/coinmarketcap.rb', line 130

def get_price_by_symbol(coin_symbol, convert_to: nil)
  raise InvalidSymbolError if coin_symbol.to_s.empty?

  validate_fiat_currency(convert_to) if convert_to

  listing = symbol_map[coin_symbol.to_s]
  raise InvalidSymbolError if listing.nil?

  get_price_for_listing(listing, convert_to: convert_to)
end

#get_price_for_listing(listing, convert_to: nil) ⇒ Object 



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# File 'lib/cointools/coinmarketcap.rb', line 141

def get_price_for_listing(listing, convert_to: nil)
  url = URI("#{BASE_URL}/v2/ticker/#{listing.numeric_id}/")

  if convert_to
    url.query = "convert=#{convert_to.upcase}"
  else
    url.query = "convert=BTC"
  end

  response = Request.get(url)

  case response
  when Net::HTTPSuccess
    record = parse_response(response, Hash)

    begin
      return CoinData.new(record, convert_to)
    rescue ArgumentError => e
      raise JSONError.new(response, e.message)
    end
  when Net::HTTPNotFound
    raise UnknownCoinError.new(response)
  when Net::HTTPClientError
    raise BadRequestError.new(response)
  else
    raise ServiceUnavailableError.new(response)
  end
end

#id_map ⇒ Object 



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# File 'lib/cointools/coinmarketcap.rb', line 82

def id_map
  load_listings if @id_map.nil?
  @id_map
end

#load_listings ⇒ Object 



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# File 'lib/cointools/coinmarketcap.rb', line 87

def load_listings
  url = URI("#{BASE_URL}/v2/listings/")

  response = Request.get(url)

  case response
  when Net::HTTPSuccess
    data = parse_response(response, Array)

    @id_map = {}
    @symbol_map = {}

    begin
      data.each do |record|
        listing = Listing.new(record)

        @id_map[listing.text_id] = listing
        @symbol_map[listing.symbol] = listing
      end
    rescue ArgumentError => e
      # TODO: JSONError vs. NoDataError? + error class docs
      raise JSONError.new(response, e.message)
    end

    data.length
  when Net::HTTPClientError
    raise BadRequestError.new(response)
  else
    raise ServiceUnavailableError.new(response)
  end
end

#symbol_map ⇒ Object 



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# File 'lib/cointools/coinmarketcap.rb', line 77

def symbol_map
  load_listings if @symbol_map.nil?
  @symbol_map
end