Class: Capwatch::Providers::CoinMarketCap

Inherits:
Object
  • Object
show all
Defined in:
lib/capwatch/providers/coin_market_cap.rb

Constant Summary collapse

NoCoinInProvider = 
Class.new(RuntimeError)
TICKER_URL = 
"https://api.coinmarketcap.com/v1/ticker/"

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#body ⇒ Object

Returns the value of attribute body.



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# File 'lib/capwatch/providers/coin_market_cap.rb', line 10

def body
  @body
end

Instance Method Details

#fetch ⇒ Object 



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# File 'lib/capwatch/providers/coin_market_cap.rb', line 22

def fetch
  @body ||= open(TICKER_URL).read
end

#fetched_json ⇒ Object 



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# File 'lib/capwatch/providers/coin_market_cap.rb', line 16

def fetched_json
  response = parse(fetch)
  update_rates(response)
  response
end

#parse(response) ⇒ Object 



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# File 'lib/capwatch/providers/coin_market_cap.rb', line 26

def parse(response)
  JSON.parse(response)
end

#update_coin(coin) ⇒ Object 



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# File 'lib/capwatch/providers/coin_market_cap.rb', line 39

def update_coin(coin)
  provider_coin = fetched_json.find { |c| c["symbol"] == coin.symbol }
  fail NoCoinInProvider, "No #{coin.symbol} in provider response" if provider_coin.nil?
  coin.name               = provider_coin["name"]
  coin.price_usd          = provider_coin["price_usd"].to_f
  coin.price_btc          = provider_coin["price_btc"].to_f
  coin.percent_change_1h  = provider_coin["percent_change_1h"].to_f
  coin.percent_change_24h = provider_coin["percent_change_24h"].to_f
  coin.percent_change_7d  = provider_coin["percent_change_7d"].to_f
end

#update_rates(response) ⇒ Object 



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# File 'lib/capwatch/providers/coin_market_cap.rb', line 30

def update_rates(response)
  response.each do |coin_json|
    Capwatch::Exchange.rate(
      coin_json['symbol'],
      coin_json["price_btc"].to_f
    )
  end
end