def query():
"""
given {start_time, end_time, aggregation}
return -> [{time, freq}, ...]
"""
start_time = datetime.strptime(request.query.get("start_time"), '%Y-%m-%dT%H:%M:%SZ')
end_time = datetime.strptime(request.query.get("end_time"), '%Y-%m-%dT%H:%M:%SZ')
aggregation = request.query.get("aggregation")
mg = MongoDB()
mg.connect()
print("querying time series...")
results = mg.find( {'created_at': {'$gt': start_time, '$lt': end_time}} )
results = Grid.get_ts(results, aggregation)
ret = []
for result in results:
ret.append({'start_time': result[0].to_datetime().strftime('%Y-%m-%dT%H:%M:%SZ'),
'frequency': result[1].item()})
response.content_type = 'application/json'
return json_dumps(ret, indent=2)
