Module: Coinpare::Fetcher

Defined in:
lib/coinpare/fetcher.rb

Overview

Handle all data fetching from remote api

Constant Summary collapse

API_URL = 
"https://min-api.cryptocompare.com/data/"

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.fetch_json(url) ⇒ Object 



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# File 'lib/coinpare/fetcher.rb', line 21

def fetch_json(url)
  uri = URI.parse(url)
  http = Net::HTTP.new(uri.host, uri.port)
  http.read_timeout = 5
  http.use_ssl = uri.scheme == "https"
  response = http.start { |req| req.get(uri.request_uri) }
  case response
  when Net::HTTPSuccess
    handle_response(JSON.parse(response.body))
  else
    response.value
  end
rescue Net::ReadTimeout
end

.fetch_prices(from_symbols, to_symbols, options) ⇒ Object 



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# File 'lib/coinpare/fetcher.rb', line 55

def fetch_prices(from_symbols, to_symbols, options)
  url = ["#{API_URL}pricemultifull"]
  url << "?fsyms=#{from_symbols}&tsyms=#{to_symbols}"
  url << "&e=#{options['exchange']}" if options["exchange"]
  url << "&tryConversion=true"

  fetch_json(url.join)
end

.fetch_top_coins_by_volume(to_symbol, options) ⇒ Object 



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# File 'lib/coinpare/fetcher.rb', line 46

def fetch_top_coins_by_volume(to_symbol, options)
  url = ["#{API_URL}top/totalvol"]
  url << "?tsym=#{to_symbol}"
  url << "&limit=#{options['top']}&page=0" if options["top"]

  fetch_json(url.join)
end

.fetch_top_exchanges_by_pair(from_symbol, to_symbol, options) ⇒ Object 



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# File 'lib/coinpare/fetcher.rb', line 65

def fetch_top_exchanges_by_pair(from_symbol, to_symbol, options)
  url = ["#{API_URL}top/exchanges/full"]
  url << "?fsym=#{from_symbol}&tsym=#{to_symbol}"
  url << "&limit=#{options['top']}&page=0" if options["top"]

  fetch_json(url.join)
end

.handle_response(response) ⇒ Object 



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# File 'lib/coinpare/fetcher.rb', line 11

def handle_response(response)
  status = response["Response"]
  if status == "Error"
    puts response["Message"]
    exit
  end
  response
end

Instance Method Details

#fetch_daily_hist(from_symbol, to_symbol, options) ⇒ Object 



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# File 'lib/coinpare/fetcher.rb', line 37

def fetch_daily_hist(from_symbol, to_symbol, options)
  url = ["#{API_URL}histoday"]
  url << "?fsym=#{from_symbol}&tsym=#{to_symbol}"
  url << "&limit=#{options['top']}" if options["top"]
  url << "&aggregate=7"

  fetch_json(url.join)
end