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# snag
# Matt Kohls
# (c) 2023
from flask import (
Blueprint, flash, g, redirect, render_template, request, url_for, json
)
from werkzeug.exceptions import abort
from datetime import datetime, timedelta
from snag.db import get_db
from snag.graphs import get_table
import time
bp = Blueprint('data', __name__, url_prefix='/data')
# Check if device is aware of daylight savings, we may need to adjust their reported time
def is_dst_aware(deviceId):
db = get_db()
sql = "SELECT dstAware FROM devices WHERE deviceId = ?"
data = db.execute(sql, [deviceId])
if data is None:
return False
else:
return data.fetchone()['dstAware'] != 0
# Process json data
#
# Expects something like this:
# {
# "scheme": "1",
# "deviceId": 1,
# "readings": [
# {
# "env": "outdoor",
# "temp": 123
# },
# {
# "env": "enclosed",
# "temp": 456
# }
# ],
# "status": [
# {
# "heater": "off",
# "battery": 10
# }
# ]
# }
def unpack_json_scheme_1(req):
try:
deviceId = req['deviceId']
db = get_db()
dstAware = is_dst_aware(deviceId)
# Status only has one object in it, and is optional
if 'status' in req:
if 'timeStamp' in req['status'][0]:
now = req['status'][0]['timeStamp']
now = datetime.strptime(now, "%Y-%m-%dT%H:%M:%SZ")
if not dstAware and time.daylight:
now = now + timedelta(hours=1)
now = now.strftime("%Y-%m-%d %H:%M:%S")
else:
now = datetime.now()
battery = req['status'][0]['battery']
heater = req['status'][0]['heater']
db.execute('INSERT INTO device_status (date, deviceId, batteryCharge, heaterRunning) VALUES (?, ?, ?, ?)', [now, deviceId, battery, heater])
for environment in req['readings']:
env = environment['environment']
temp = environment['temperature']
humidity = environment['humidity']
pressure = environment['pressure']
now = environment['timeStamp']
now = datetime.strptime(now, "%Y-%m-%dT%H:%M:%SZ")
if not dstAware and time.daylight:
now = now + timedelta(hours=1)
now = now.strftime("%Y-%m-%d %H:%M:%S")
if env == 'outdoor':
lux = environment['lux']
uv = environment['uv']
db.execute('INSERT INTO env_outdoor (date, deviceId, temperature, humidity, pressure, lux, uv_intensity) VALUES (?, ?, ?, ?, ?, ?, ?)', [now, deviceId, temp, humidity, pressure, lux, uv])
elif env == 'indoor':
db.execute('INSERT INTO env_indoor (date, deviceId, temperature, humidity, pressure) VALUES (?, ?, ?, ?, ?)', [now, deviceId, temp, humidity, pressure])
elif env == 'enclosed':
light = environment['light']
db.execute('INSERT INTO env_enclosed (date, deviceId, temperature, humidity, pressure, light) VALUES (?, ?, ?, ?, ?, ?)', [now, deviceId, temp, humidity, pressure, light])
else:
raise 'Bad reading environment'
db.commit()
except Exception as err:
print(err)
return "Bad JSON", 400
return "Data received", 200
## For submitting data to server
@bp.route('/json', methods=['POST'])
def add_json_data():
if request.is_json:
req = request.get_json()
if 'scheme' in req:
if req['scheme'] == '1':
return unpack_json_scheme_1(req)
else:
abort(400, "Unknown scheme")
else:
abort(400, "Unknown JSON")
else:
abort(400, "Unknown payload type")
### Information Routes ###
## Gives information about all the devices
@bp.route('/info/devices', methods=['GET', 'POST'])
def get_info_devices():
db = get_db()
out = []
devices = db.execute('SELECT * FROM devices ORDER BY deviceId').fetchall()
for device in devices:
envList = []
envs = db.execute('SELECT * FROM device_env WHERE deviceId = ?', [device['deviceId']]).fetchall()
for env in envs:
envDict = {
"environment" : env["environment"],
#"environmentDesc" : env["environmentDescription"]
}
envList.append(envDict)
deviceLine = {
"deviceId" : device["deviceId"],
"deviceName" : device["deviceName"],
"deviceDescription" : device["deviceLocation"]
}
deviceLine['environments'] = envList
out.append(deviceLine)
return out
## Grabs data from db, or None if not
def get_data_selection(device_ids, start_time, end_time, columns, environment):
if end_time is None:
end_time = datetime.now()
if start_time is None:
start_time = end_time - timedelta(days=1)
if end_time < start_time:
start_time, end_time = end_time, start_time
db = get_db()
if environment is not None:
devqs = "{0}".format(', '.join(['?'] * len(device_ids)))
argument_list = [start_time.isoformat(" ", "seconds"), end_time.isoformat(" ", "seconds")] + device_ids
sql = (f"SELECT {columns} "
f"FROM {environment} "
f"WHERE (date BETWEEN ? AND ?) AND deviceId IN ( {devqs} )")
subset = db.execute(sql, argument_list).fetchall()
else:
subset = None
return subset
### Device Routes ###
## Get data by devices
#
# Expected json payload
# {
# "devices" : [ "", "", .. ] ; Required
# "environment" : "", ; Required
# "startTime" : "", ; Optional
# "endTime" : "", ; Optional
# "measurements" : [ "", "", .. ] ; Required
# }
#
# Returns a json payload like this
# [
# {"timeStamp":"2112-09-21T09:21:00", "":"", ..}, ..
# ]
#
@bp.route('/device', methods=['GET', 'POST'])
def get_n_device_data():
if request.is_json:
payload = request.get_json()
return process_device_data_req(payload)
else:
abort(400, "Missing request data")
## Get data by deviceId
#
# Expected json payload
# {
# "environment" : "", ; Required
# "startTime" : "", ; Optional
# "endTime" : "", ; Optional
# "measurements" : [ "", "", ..] ; Required
# }
#
# Returns a json payload like this
# [
# {"timeStamp":"2112-09-21T09:21:00", "":"", ..}, ..
# ]
#
@bp.route('/device/<int:device_id>', methods=['GET', 'POST'])
def get_device_data(device_id):
if request.is_json:
payload = request.get_json()
payload['devices'] = [device_id]
return process_device_data_req(payload)
else:
abort(400, "Missing request data")
## Processes a device data request
#
# Expected json payload
# {
# "devices" : [ "", "", .. ] ; Required
# "environment" : "", ; Required
# "startTime" : "", ; Optional
# "endTime" : "", ; Optional
# "measurements" : [ "", "", .. ] ; Required
# }
#
# Returns a json payload like this
# [
# {"timeStamp":"2112-09-21T09:21:00", "":"", ..}, ..
# ]
#
def process_device_data_req(payload):
if 'environment' in payload and 'measurements' in payload and 'devices' in payload:
env = get_table(payload['environment'])
if env is None:
abort(400, "Unknown environment: " + payload['environment'])
end_time = datetime.now()
start_time = end_time - timedelta(days=1)
if 'startTime' in payload:
start_time = payload['startTime']
start_time = datetime.strptime(start_time, "%Y-%m-%dT%H:%M:%SZ")
if 'endTime' in payload:
end_time = payload['endTime']
end_time = datetime.strptime(end_time, "%Y-%m-%dT%H:%M:%SZ")
selected_columns = "date, deviceId"
for measurement in payload['measurements']:
selected_columns = selected_columns + ", " + measurement
if selected_columns == "date, deviceId":
abort(400, "Bad json payload - missing measurements")
else:
device_ids = []
for device in payload['devices']:
device_ids.append(device)
if device_ids == []:
abort(400, "Bad json payload - missing devices")
data = get_data_selection(device_ids, start_time, end_time, selected_columns, env)
if data is None:
abort(404, "No data found")
outlist = []
for row in data:
reading = { "timeStamp":row["date"].strftime('%Y-%m-%dT%H:%M:%SZ'),
"deviceId":row["deviceId"]}
for measurement in payload['measurements']:
reading[measurement] = row[measurement]
outlist.append(reading)
return outlist
else:
abort(400, "Bad json payload")
# Get data by environment type
@bp.route('/environment', methods=['GET', 'POST'])
def get_env_data():
if request.args['type'] is not None:
return "todo"
else:
abort(400, "Unknown environment type")
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