Adds Downtime Awareness

This adds a Downtime model and relevant operations so that
the dashboard knows when a lab is down for maintenance and
can act accordingly.

This change doesn't modify the front end at all,
but it does pass relevant downtime info to the
templates so that they can be updated in a future change.

Change-Id: Idb88b15838b949f352f11a31a1fce9749d283d28
Signed-off-by: Parker Berberian <pberberian@iol.unh.edu>

1 files changed, 34 insertions, 0 deletions

diff --git a/src/api/models.py b/src/api/models.py
index 1f708ae..682785b 100644
--- a/src/api/models.py
+++ b/src/api/models.py
@@ -13,6 +13,7 @@ from django.db import models
 from django.core.exceptions import PermissionDenied
 from django.shortcuts import get_object_or_404
 from django.urls import reverse
+from django.utils import timezone
 
 import json
 import uuid
@@ -30,6 +31,7 @@ from resource_inventory.models import (
 )
 from resource_inventory.idf_templater import IDFTemplater
 from resource_inventory.pdf_templater import PDFTemplater
+from account.models import Downtime
 
 
 class JobStatus(object):
@@ -67,6 +69,38 @@ class LabManager(object):
     def __init__(self, lab):
         self.lab = lab
 
+    def get_downtime(self):
+        return Downtime.objects.filter(start__lt=timezone.now(), end__gt=timezone.now(), lab=self.lab)
+
+    def get_downtime_json(self):
+        downtime = self.get_downtime().first()  # should only be one item in queryset
+        if downtime:
+            return {
+                "is_down": True,
+                "start": downtime.start,
+                "end": downtime.end,
+                "description": downtime.description
+            }
+        return {"is_down": False}
+
+    def create_downtime(self, form):
+        """
+        takes in a dictionary that describes the model.
+        {
+          "start": utc timestamp
+          "end": utc timestamp
+          "description": human text (optional)
+        }
+        For timestamp structure, https://docs.djangoproject.com/en/2.2/ref/forms/fields/#datetimefield
+        """
+        Downtime.objects.create(
+            start=form.cleaned_data['start'],
+            end=form.cleaned_data['end'],
+            description=form.cleaned_data['description'],
+            lab=self.lab
+        )
+        return self.get_downtime_json()
+
     def update_host_remote_info(self, data, host_id):
         host = get_object_or_404(Host, labid=host_id, lab=self.lab)
         info = {}