update device detail

Author: silvioheinze

app/devices/templatetags/__init__.py

@@ -0,0 +1,8 @@
+# devices/templatetags/custom_tags.py
+from django import template
+
+register = template.Library()
+
+@register.filter
+def get(dictionary, key):
+    return dictionary.get(key)

app/devices/templatetags/custom_tags.py

@@ -3,9 +3,12 @@
 from django.views.generic.edit import UpdateView
 from django.contrib.auth.mixins import UserPassesTestMixin, LoginRequiredMixin
 from django.urls import reverse_lazy, reverse
+from django.utils import timezone
+from django.core.serializers.json import DjangoJSONEncoder
+from django.core.paginator import Paginator
+import json
 
-
-from .models import Device, DeviceStatus
+from .models import Device, DeviceStatus, DeviceLogs
 from .forms import DeviceForm, DeviceNotesForm
 
 class DeviceListView(UserPassesTestMixin, ListView):
@@ -21,18 +24,67 @@ def get_queryset(self):
         return Device.objects.all().order_by('id')
 
 
-class DeviceDetailView(UserPassesTestMixin, DetailView):
+class DeviceDetailView(LoginRequiredMixin, UserPassesTestMixin, DetailView):
     model = Device
     context_object_name = 'device'
     template_name = 'devices/detail.html'
 
     def test_func(self):
+        # Only superusers can access this view
         return self.request.user.is_authenticated and self.request.user.is_superuser
 
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
-        # Fetch all DeviceStatus entries related to this Device, ordered by most recent
-        context['device_statuses'] = DeviceStatus.objects.filter(device=self.object).order_by('-time_received')
+        device = self.object
+
+        # Fetch all DeviceStatus entries related to this Device, ordered by time_received ascendingly
+        device_status_qs = DeviceStatus.objects.filter(device=device).order_by('time_received')
+        context['battery_status'] = device_status_qs.exists()
+
+        if context['battery_status']:
+            # Prepare data for Chart.js
+            battery_times = [
+                status.time_received.strftime('%Y-%m-%d %H:%M') 
+                for status in device_status_qs 
+                if status.battery_soc is not None and status.battery_voltage is not None
+            ]
+            battery_charges = [
+                min(max(status.battery_soc, 0), 100) 
+                for status in device_status_qs 
+                if status.battery_soc is not None and status.battery_voltage is not None
+            ]
+            battery_voltages = [
+                round(status.battery_voltage, 2) 
+                for status in device_status_qs 
+                if status.battery_soc is not None and status.battery_voltage is not None
+            ]
+
+            # Serialize data to JSON format
+            context['battery_times'] = json.dumps(battery_times, cls=DjangoJSONEncoder)
+            context['battery_charges'] = json.dumps(battery_charges, cls=DjangoJSONEncoder)
+            context['battery_voltages'] = json.dumps(battery_voltages, cls=DjangoJSONEncoder)
+
+        # Fetch all DeviceLogs entries related to this Device, ordered by timestamp descendingly
+        device_logs_qs = DeviceLogs.objects.filter(device=device).order_by('-timestamp')
+        
+        # Implement pagination (10 logs per page)
+        paginator = Paginator(device_logs_qs, 10)
+        page_number = self.request.GET.get('page')
+        page_obj = paginator.get_page(page_number)
+
+        context['device_logs'] = page_obj
+        context['paginator'] = paginator
+        context['page_obj'] = page_obj
+
+        # Define a level to badge class mapping
+        context['level_badge_map'] = {
+            10: 'bg-secondary',  # DEBUG
+            20: 'bg-info',        # INFO
+            30: 'bg-warning',     # WARNING
+            40: 'bg-danger',      # ERROR
+            50: 'bg-dark',        # CRITICAL
+        }
+
         return context
 
 

app/devices/views.py

@@ -49,8 +49,9 @@
     'django.contrib.admin',
     'django.contrib.auth',
     'django.contrib.contenttypes',
-    'django.contrib.sessions',
+    'django.contrib.humanize',
     'django.contrib.messages',
+    'django.contrib.sessions',
     'django.contrib.staticfiles',
     'django.contrib.sites',
     # Third-party