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import constants
import readdata
import sys
import json
import requests
from pytz import UTC
from sys import stdout, stderr
from datetime import timedelta, datetime
from time import sleep
from itertools import islice, takewhile
from database_records import GenericTimestampedRecord
from optparse import OptionParser
G5_IS_DEFAULT = True
parser = OptionParser()
parser.add_option("--g4", action="store_false", dest="g5", default=G5_IS_DEFAULT, help="use Dexcom G4 instead of Dexcom G5")
parser.add_option("--g5", action="store_true", dest="g5", default=G5_IS_DEFAULT, help="use Dexcom G5 instead of Dexcom G4")
parser.add_option("-a", "--all", action="store_const", dest="command", const="dump_everything", help="dump all available records")
parser.add_option("-p", "--poll", action="store_const", dest="command", const="poll", help="poll for latest CGM record")
parser.add_option("--test", action="store_const", dest="command", const="test", help="test")
parser.add_option("--hours", type="int", dest="hours", default=None, help="display N most recent hours of CGM records")
parser.add_option("-n", type="int", dest="num_records", default=None, help="number of CGM records to display")
parser.add_option("-v", "--verbose", action="store_true", dest="verbose", help="verbosity (currently for debugging)")
parser.add_option("-H", "--human", action="store_true", dest="human", help="print human-readable times")
parser.add_option("-j", "--json", action="store_true", dest="json", help="print JSON output")
parser.add_option("--http", type="string", dest="host", help="submit via HTTP")
(options, args) = parser.parse_args()
command = options.command or "dump_cgm"
VERBOSE = options.verbose
HUMAN = options.human
JSON = options.json
HOST = options.host
if command is 'dump_cgm' and options.num_records is None and not options.hours:
options.hours = 2
def get_dexcom_reader():
if options.g5:
dd = readdata.DexcomG5.FindDevice()
return readdata.DexcomG5(dd)
else:
dd = readdata.Dexcom.FindDevice()
return readdata.Dexcom(dd)
dr = get_dexcom_reader()
def parseable_record_types():
unparseable = ['FIRMWARE_PARAMETER_DATA', 'RECEIVER_LOG_DATA', 'USER_SETTING_DATA', 'MAX_VALUE']
parsed_to_xml = ['MANUFACTURING_DATA', 'PC_SOFTWARE_PARAMETER']
skip = unparseable + parsed_to_xml
return filter(lambda v: not v in skip, constants.RECORD_TYPES)
def choose_range(rs):
if options.hours:
now = dr.ReadSystemTime()
when = now - timedelta(hours=options.hours)
return takewhile(lambda r: r.system_time > when, rs)
else:
return islice(rs, options.num_records)
def dump_everything():
for t in parseable_record_types():
print t + ":"
for r in choose_range(dr.iter_records(t)):
print toJSON(r) if JSON else r
def dump_cgm():
for cr in reversed(list(choose_range(dr.iter_records('EGV_DATA')))):
if not cr.display_only:
print toJSON(cr) if JSON else cr
def recent(t):
now = dr.ReadSystemTime()
return t.system_time > now - timedelta(minutes=5)
def print_verbose(s):
global VERBOSE
if VERBOSE:
stderr.write('%s\n' % str(s))
def read_recent_egv_data():
try:
r = dr.ReadRecords('EGV_DATA', 1)[-1]
if recent(r) and not r.is_special and not r.display_only:
return r
else:
return None
except ValueError as v:
if (v.args[0] == 'Attempting to use a port that is not open'):
return False
else:
print_verbose(v)
return None
except:
print_verbose(sys.exc_info)
return None
def time_fmt(t):
global HUMAN
return t.strftime('%c' if HUMAN else '%s')
def format_times(now, stamp):
diff = (stamp - now).total_seconds()
operand = '-' if diff < 0 else '+' # should always be -
return '%s %s %d' % (time_fmt(now), operand, abs(diff))
def print_localtime(str):
print '%s (system): %s' % (time_fmt(datetime.now()), str)
CONNECTED = None
def connected(state):
global CONNECTED
if (state == CONNECTED):
return
else:
CONNECTED = state
print_localtime('dexcom receiver %s connected' % ('is' if state else 'is not'))
def sleep_verbose(n):
print_verbose('sleep(%d)' % n)
sleep(n)
def POST(path, json_str):
try:
resp = requests.post(HOST + path, data=json_str,
headers={'Content-type':
'application/json'})
print_verbose(resp.text)
resp.raise_for_status()
return True
except:
print_verbose(sys.exc_info())
return False
def send_ping(now):
if HOST:
POST('/ping', toJSON(now))
def print_cgm_bg(now, r):
if HOST:
r.trend_arrow.replace('45_', 'DIAGONAL_', 1)
POST('/bgevent', toJSON(r))
send_ping(now)
return
elif JSON:
print toJSON(r)
else:
print '%s: %s %s' % (format_times(now, r.system_time), r.glucose, r.trend_arrow)
stdout.flush()
def poll():
print_localtime('dexcom_dumper started')
while True:
r = read_recent_egv_data()
if r is None:
connected(True)
if HOST:
now = dr.ReadSystemTime()
send_ping(now)
sleep_verbose(10)
elif r is False:
connected(False)
sleep_verbose(10)
else:
now = dr.ReadSystemTime()
print_cgm_bg(now, r)
next_reading = (r.system_time - now + timedelta(minutes=5, seconds=2)).total_seconds()
if (next_reading > 0):
sleep_verbose(next_reading)
def since(when, rectype='EGV_DATA'):
return reversed(list(takewhile(lambda r: r.system_time > when, dr.iter_records(rectype))))
def test():
now = dr.ReadSystemTime()
POST('/ping', toJSON(now))
for t in parseable_record_types():
rs = dr.ReadRecords(t, 1)
if not rs:
continue
r=rs[-1]
print toJSON([t,r])
class JSON_Time(json.JSONEncoder):
def default(self, o):
if isinstance(o, datetime):
if o.tzinfo is None:
return o.replace(tzinfo=UTC).isoformat()
else:
return o.isoformat()
return json.JSONEncoder.default(self, o)
class JSON_CGM(JSON_Time):
def default(self, o):
if isinstance(o, GenericTimestampedRecord):
op={}
for k in o.BASE_FIELDS + o.FIELDS:
op[k] = getattr(o, k)
return op
return JSON_Time.default(self, o)
def toJSON(o):
return json.dumps(o, cls=JSON_CGM)
{"dump_everything": dump_everything,
"dump_cgm": dump_cgm,
"poll": poll,
"test": test,
}[command]()
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