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Update Server for returning time

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Server now return lastUpdateTZ, so that the requesting
client receives the last update time in his respective
local time (given GPS coordinates are provided).

Lots of print statements still in place.
This commit is contained in:
Tim Staat 2025-08-28 16:59:29 +02:00
parent e44761db8f
commit be390de996
1 changed files with 60 additions and 22 deletions
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82
server/python_server.py
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@ -3,6 +3,8 @@ from datetime import datetime
import pint
import sqlite3
from pyproj import Geod
import timezonefinder, pytz
from datetime import timezone as dttz
app = Flask(__name__)
@ -15,10 +17,16 @@ with sqlite3.connect('location.db', check_same_thread=False) as conn:
lat REAL,
long REAL,
gpsDateTime INTEGER,
insertDateTime TEXT DEFUALT CURRENT_TIMESTAMP
insertDateTime TEXT DEFAULT CURRENT_TIMESTAMP
);"""
)
with sqlite3.connect('location.db', check_same_thread=False) as conn:
cur = conn.cursor()
res = cur.execute("SELECT * FROM location_data;")
print(res.fetchall())
ureg = pint.UnitRegistry()
geodesic = Geod(ellps='WGS84')
@ -30,8 +38,11 @@ def hello():
def getGpsDistance():
own_id = request.args.get('id')
req_id = request.args.get('req_id')
lat = dm(request.args.get('lat')) if request.args.get('lat') != '0' else 0.0
long = dm(request.args.get('long')) if request.args.get('long') != '0' else 0.0
lat = request.args.get('lat').translate(str.maketrans('', '', ':'))
long = request.args.get('long').translate(str.maketrans('', '', ':'))
lat = dm(lat) if lat and len(lat) > 1 else 0.0
long = dm(long) if long and len(long) > 1 else 0.0
try:
gpsDateTime = datetime.strptime(request.args.get('gpsDateTime')[:11], '%d%m%y%H%M%S')
@ -41,34 +52,61 @@ def getGpsDistance():
gpsDateTime = datetime.now()
print(request.args)
with sqlite3.connect('location.db', check_same_thread=False) as conn:
timezone = None
time = None
cur = conn.cursor()
try:
if (lat != 0.0 and long != 0.0):
with sqlite3.connect('location.db', check_same_thread=False) as conn:
cur = conn.cursor()
cur.execute(f'INSERT INTO location_data(sender_id, lat, long, gpsDateTime) VALUES({own_id}, {lat}, {long}, "{gpsDateTime}");')
conn.commit()
res = cur.execute(f'SELECT lat, long, gpsDateTime, insertDateTime FROM location_data WHERE sender_id = {req_id} ORDER BY insertDateTime DESC;')
row = res.fetchone()
try:
res = cur.execute(f'SELECT lat, long, gpsDateTime, insertDateTime FROM location_data WHERE sender_id = {req_id} ORDER BY insertDateTime DESC')
req_lat, req_long, req_dateTime, insertDateTime = res.fetchone()
except sqlite3.Error as error:
print("Failed to read data from table, using default values", error)
if row:
req_lat, req_long, req_dateTime, insertDateTime = row
time = datetime.fromisoformat(req_dateTime)
else:
req_lat = 0.0
req_long = 0.0
req_dateTime = datetime.now()
time = datetime.now()
except sqlite3.Error as error:
print("Failed to read data from table, using default values", error)
req_lat = 0.0
req_long = 0.0
req_dateTime = datetime.now()
if (lat != 0.0 and long != 0.0):
cur.execute(f'INSERT INTO location_data(sender_id, lat, long, gpsDateTime) VALUES({own_id}, {lat}, {long}, "{gpsDateTime.isoformat()}");')
conn.commit()
print(f'lat: {lat}, long: {long}, req_lat: {req_lat}, req_long: {req_long}, req_dateTime: {req_dateTime}')
fwd_azimuth, back_azimuth, distance = geodesic.inv(long, lat, req_long, req_lat)
distance = distance * ureg.meter
prettyDistance = f"{distance:.1f~#P}"
print(f'fwd: {fwd_azimuth}, bwd: {back_azimuth}, dist: {prettyDistance}')
tf = timezonefinder.TimezoneFinder()
timezone_str = tf.certain_timezone_at(lat=lat, lng=long)
if timezone_str is None:
print("Could not determine the time zone")
else:
print(timezone_str)
print(pytz.timezone(timezone_str))
time = time.replace(tzinfo=dttz.utc).astimezone(pytz.timezone(timezone_str))
print(time)
else:
prettyDistance = "No GPS Signal"
fwd_azimuth = 0.0
time = datetime.utcnow
print(f'lat: {lat}, long: {long}, req_lat: {req_lat}, req_long: {req_long}, req_dateTime: {req_dateTime}')
fwd_azimuth, back_azimuth, distance = geodesic.inv(long, lat, req_long, req_lat)
distance = distance * ureg.meter
prettyDistance = f"{distance:.1f~#P}"
print(f'fwd: {fwd_azimuth}, bwd: {back_azimuth}, dist: {prettyDistance}')
return jsonify({'distance': prettyDistance, 'azimuth': fwd_azimuth})
return jsonify({'distance': prettyDistance, 'azimuth': fwd_azimuth, 'lastUpdateTZ': time.strftime("%H:%M:%S")})