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bite/bite/telemetry/views.py

107 lines
3.7 KiB
Python

# -*- coding: utf-8 -*-
# vim: tabstop=4 shiftwidth=4 softtabstop=4
#
# BITE - A Basic/IoT/Example
# Copyright (C) 2020 Daniele Viganò <daniele@vigano.me>
#
# BITE is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# BITE is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
from django.http import Http404
from django.utils import timezone
from django.utils.dateparse import parse_datetime
from rest_framework.views import APIView
from rest_framework.viewsets import ModelViewSet
from telemetry.models import Telemetry
from telemetry.serializers import (TelemetrySerializer,
TelemetrySummarySerializer)
from rest_framework.response import Response
from rest_framework.exceptions import ParseError
class TelemetryView(ModelViewSet):
queryset = Telemetry.objects.all()
serializer_class = TelemetrySerializer
lookup_field = 'device'
def list(self, request, device=None):
queryset = Telemetry.objects.filter(device__serial=device)
if not queryset:
raise Http404
serializer = TelemetrySerializer(queryset, many=True)
return Response(serializer.data)
class TelemetrySummaryView(APIView):
def get(self, request, device, format=None):
count = Telemetry.objects.filter(device__serial=device).count()
if count == 0:
raise Http404
first = Telemetry.objects.filter(
device__serial=device).order_by('time')[:1][0]
last = Telemetry.objects.filter(
device__serial=device).order_by('-time')[:1][0]
data = {
'device': device,
'stats': {
'count_samples': count,
'first_sample': first.time,
'last_sample': last.time}
}
serializer = TelemetrySummarySerializer(data)
return Response(serializer.data)
class TelemetryRange(ModelViewSet):
queryset = Telemetry.objects.all()
serializer_class = TelemetrySerializer
lookup_field = 'device'
@staticmethod
def datetime_validation(datetime):
parsed_datetime = parse_datetime(datetime)
if parsed_datetime is None:
raise ParseError({
datetime: 'Invalid date format'
})
return timezone.make_aware(parsed_datetime)
def list(self, request, device, time_from, time_to=None):
time_from = self.datetime_validation(time_from)
time_to = (
timezone.now() if time_to is None else
self.datetime_validation(time_to)
)
queryset = Telemetry.objects.filter(
device__serial=device,
time__range=[time_from, time_to])
if not queryset:
raise Http404
serializer = TelemetrySerializer(queryset, many=True)
return Response(serializer.data)
class TelemetryLatest(ModelViewSet):
queryset = Telemetry.objects.all()
serializer_class = TelemetrySerializer
lookup_field = 'device'
def retrieve(self, request, device=None):
queryset = Telemetry.objects.filter(
device__serial=device).order_by('-time')[:1]
if not queryset:
raise Http404
serializer = TelemetrySerializer(queryset[0])
return Response(serializer.data)