[feature] Add Monitoring Checks section in Device Admin #53

Closes #53

openwisp_monitoring/device/admin.py

@@ -1,6 +1,11 @@
 import uuid
 
 from django.contrib import admin
+from django.contrib.contenttypes.admin import GenericStackedInline
+from django.contrib.contenttypes.forms import BaseGenericInlineFormSet
+from django.contrib.contenttypes.models import ContentType
+from django.db.models import TextField
+from django.forms import Textarea
 from django.urls import reverse
 from django.utils.html import format_html
 from django.utils.safestring import mark_safe
@@ -9,13 +14,44 @@
 
 from openwisp_controller.config.admin import DeviceAdmin as BaseDeviceAdmin
 from openwisp_controller.config.models import Device
+from openwisp_utils.admin import TimeReadonlyAdminMixin
 
 from ..monitoring.admin import MetricAdmin
 from . import settings as app_settings
 
 DeviceData = load_model('device_monitoring', 'DeviceData')
 DeviceMonitoring = load_model('device_monitoring', 'DeviceMonitoring')
 Chart = load_model('monitoring', 'Chart')
+Check = load_model('check', 'Check')
+
+
+class CheckInlineFormSet(BaseGenericInlineFormSet):
+    def full_clean(self):
+        for form in self.forms:
+            obj = form.instance
+            if not obj.content_type or not obj.object_id:
+                setattr(
+                    form.instance,
+                    self.ct_field.get_attname(),
+                    ContentType.objects.get_for_model(self.instance).pk,
+                )
+                setattr(form.instance, self.ct_fk_field.get_attname(), self.instance.pk)
+        super().full_clean()
+
+
+class CheckInline(TimeReadonlyAdminMixin, GenericStackedInline):
+    model = Check
+    extra = 0
+    formset = CheckInlineFormSet
+    fieldsets = [
+        (
+            None,
+            {'fields': ('name', 'check', 'active', 'params', 'created', 'modified',)},
+        ),
+    ]
+    formfield_overrides = {
+        TextField: {'widget': Textarea(attrs={'rows': 3, 'cols': 40})},
+    }
 
 
 class DeviceAdmin(BaseDeviceAdmin):
@@ -54,6 +90,8 @@ def get_form(self, request, obj=None, **kwargs):
         return super().get_form(request, obj, **kwargs)
 
 
+DeviceAdmin.inlines.append(CheckInline)
+
 DeviceAdmin.Media.js += MetricAdmin.Media.js + ('monitoring/js/percircle.js',)
 DeviceAdmin.Media.css['all'] += (
     'monitoring/css/percircle.css',

openwisp_monitoring/device/tests/test_admin.py

@@ -1,12 +1,17 @@
 from django.contrib.auth import get_user_model
+from django.contrib.contenttypes.forms import generic_inlineformset_factory
 from django.urls import reverse
-from swapper import load_model
+from django.utils.timezone import now
+from swapper import get_model_name, load_model
 
+from ...check.settings import CHECK_CLASSES
+from ..admin import CheckInline, CheckInlineFormSet
 from . import DeviceMonitoringTestCase
 
 Chart = load_model('monitoring', 'Chart')
 Metric = load_model('monitoring', 'Metric')
 DeviceData = load_model('device_monitoring', 'DeviceData')
+Check = load_model('check', 'Check')
 
 
 class TestAdmin(DeviceMonitoringTestCase):
@@ -21,14 +26,20 @@ def _login_admin(self):
 
     def test_device_admin(self):
         dd = self.create_test_adata()
+        check = Check.objects.create(
+            name='Ping check', check=CHECK_CLASSES[0][0], content_object=dd, params={},
+        )
         url = reverse('admin:config_device_change', args=[dd.pk])
         self._login_admin()
         r = self.client.get(url)
         self.assertContains(r, '<h2>Status</h2>')
         self.assertContains(r, '<h2>Charts</h2>')
+        self.assertContains(r, '<h2>Checks</h2>')
         self.assertContains(r, 'Storage')
         self.assertContains(r, 'CPU')
         self.assertContains(r, 'RAM status')
+        self.assertContains(r, check.name)
+        self.assertContains(r, check.params)
 
     def test_no_device_data(self):
         d = self._create_device(organization=self._create_org())
@@ -64,3 +75,35 @@ def test_uuid_bug(self):
         self._login_admin()
         r = self.client.get(url)
         self.assertContains(r, '<h2>Status</h2>')
+
+    def test_check_inline_formset(self):
+        d = self._create_device(organization=self._create_org())
+        check_inline_formset = generic_inlineformset_factory(
+            model=Check, form=CheckInline.form, formset=CheckInlineFormSet
+        )
+        # model_name changes if swapped
+        model_name = get_model_name('check', 'Check').lower().replace('.', '-')
+        ct = f'{model_name}-content_type-object_id'
+        data = {
+            f'{ct}-TOTAL_FORMS': '1',
+            f'{ct}-INITIAL_FORMS': '0',
+            f'{ct}-MAX_NUM_FORMS': '0',
+            f'{ct}-0-name': 'Ping Check',
+            f'{ct}-0-check': CHECK_CLASSES[0][0],
+            f'{ct}-0-params': '{}',
+            f'{ct}-0-active': True,
+            f'{ct}-0-created': now(),
+            f'{ct}-0-modified': now(),
+        }
+        formset = check_inline_formset(data)
+        formset.instance = d
+        self.assertTrue(formset.is_valid())
+        self.assertEqual(formset.errors, [{}])
+        self.assertEqual(formset.non_form_errors(), [])
+        form = formset.forms[0]
+        form.cleaned_data = data
+        form.save(commit=True)
+        self.assertEqual(Check.objects.count(), 1)
+        c = Check.objects.first()
+        self.assertEqual(c.name, 'Ping Check')
+        self.assertEqual(c.content_object, d)