def preload_chart(chart, file_path, allow_time_gap_in_sec=90):
loaded_bar = {}
for line in open(file_path):
line = line.strip()
if len(line) == 0: continue
# DATE,BEGIN,END,LOW,HIGH
data = line.split(",")
start_date = dateutil.parser.parse(data[0])
begin = float(data[1])
end = float(data[2])
low = float(data[3])
high = float(data[4])
timestamp = TimeUtil.timestamp_utc(start_date)
loaded_bar[timestamp] = (begin, end, low, high)
keys = sorted(loaded_bar.keys())
latest_date = keys[-1]
if (TimeUtil.now_timestamp_utc() - latest_date) > allow_time_gap_in_sec:
print("Cannot load preloaded chart due to timegap: ",
(TimeUtil.now_timestamp_utc() - latest_date))
return
one_sec = 1
for timestamp in keys:
begin, end, low, high = loaded_bar[timestamp]
chart.add_new_data(timestamp + one_sec, begin)
chart.add_new_data(timestamp + one_sec, low)
chart.add_new_data(timestamp + one_sec, high)
chart.add_new_data(timestamp + one_sec, end)
print("Load preloaded chart!!")
def on_message(self, ws, msg):
now = TimeUtil.now_timestamp_utc()
received_data = json.loads(msg)
#print("msg:"+str(msg))
if not isinstance(received_data, list):
print("error: recieved data is not array: " + str(msg))
return
if len(received_data) < 5:
print("error: recieved array length is less than 5: " +
str(received_data))
return
msg_id = received_data[0]
pair = received_data[1]
price = float(received_data[2])
amount = float(received_data[3])
trade_type = received_data[4]
update_only_high_or_low = False
if self.last_received_id is not None and msg_id < self.last_received_id:
# this is not clever solution!!!
# because old message possibly update (high&low)
# but I ignore it. my algorithm cannot handle high & low value
#print("old message recieved (latest:%d, received:%d)" % (self.last_received_id, msg_id,))
update_only_high_or_low = True
return
if pair != "btc_jpy":
print("received data is not btc_jpy data: " + str(pair))
return
self.last_received_id = max(msg_id, self.last_received_id)
# update chart
self.chart.add_new_data(now, price, update_only_high_or_low)
# callback after update
if self.callback_on_update is not None:
self.callback_on_update(0)