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from PyQt4.QtCore import SIGNAL
import decimal
import httplib
import json
import threading
class Exchanger(threading.Thread):
def __init__(self, parent):
threading.Thread.__init__(self)
self.daemon = True
self.parent = parent
self.quote_currencies = None
self.lock = threading.Lock()
# Do price discovery
self.start()
def exchange(self, btc_amount, quote_currency):
with self.lock:
if self.quote_currencies is None:
return None
quote_currencies = self.quote_currencies.copy()
if quote_currency not in quote_currencies:
return None
return btc_amount * quote_currencies[quote_currency]
def run(self):
self.discovery()
def discovery(self):
connection = httplib.HTTPSConnection('intersango.com')
connection.request("GET", "/api/ticker.php")
response = connection.getresponse()
if response.reason == httplib.responses[httplib.NOT_FOUND]:
return
response = json.loads(response.read())
# 1 = BTC:GBP
# 2 = BTC:EUR
# 3 = BTC:USD
# 4 = BTC:PLN
quote_currencies = {}
try:
quote_currencies["GBP"] = self._lookup_rate(response, 1)
quote_currencies["EUR"] = self._lookup_rate(response, 2)
quote_currencies["USD"] = self._lookup_rate(response, 3)
with self.lock:
self.quote_currencies = quote_currencies
self.parent.emit(SIGNAL("refresh_balance()"))
except KeyError:
pass
def _lookup_rate(self, response, quote_id):
return decimal.Decimal(response[str(quote_id)]["last"])
if __name__ == "__main__":
exch = Exchanger(("EUR", "USD", "GBP"))
print exch.exchange(1, "EUR")