GPS-Logger/views.py

import json
from datetime import datetime
from django.shortcuts import render
from django.http import JsonResponse, HttpResponse
from django.views import View
from django.contrib.auth.decorators import permission_required
from django.contrib.auth.mixins import PermissionRequiredMixin

from .models import *

from pprint import pprint

def index(request):
  return render(request, 'gps_logger/index.html')

@permission_required("gps-logger.markers.change")
def upload(request):
  return render(request, 'gps_logger/upload.html')

class MarkerCreateView(View, PermissionRequiredMixin):
  permission_required = ("gps-logger.markers.change")

  def post(self, request):
    status_code = 204
    data = json.loads(request.body)
    for file in data:
      if len(data[file]) == 0:
        continue
      objects = [Marker(
          timestamp=datetime.strptime(x['timestamp'].replace("Z","-0000"), r"%Y-%m-%dT%H:%M:%S.%f%z"),
          lat = x['lat'],
          lng = x['lng'],
          alt = x['alt'],
          hdop = x.get('hdop', None),
          speed = x.get('speed', None)
        ) for x in data[file]]
      start_date = objects[0].timestamp
      end_date = objects[-1].timestamp
      oldMarkers = Marker.objects.filter(timestamp__range=(start_date, end_date)).all()
      identical = len(oldMarkers) == len(objects)
      if identical:
        for i, marker in enumerate(oldMarkers):
          if marker.timestamp != objects[i].timestamp:
            print(type(marker.timestamp), type(objects[i].timestamp))
            identical = False
            break

      print(len(oldMarkers), len(objects), identical)      
      if not identical:
        oldMarkers.delete()
        Marker.objects.bulk_create(objects)
        status_code = 201
    return HttpResponse(status=status_code)


class MarkerView(View):
  def get(self, request):
    return JsonResponse(list(Marker.objects.values()), safe=False)