Limit User Booking Length and Extensions

Jira: PHAROS-363

Bookings can now only be 3 weeks upon creation with a maximum of 2
1 week extensions.

Change-Id: I677770de3f62f188d23e60be6d71b42b25bf007e
Signed-off-by: Sawyer Bergeron <sbergeron@iol.unh.edu>

3 files changed, 48 insertions, 2 deletions

diff --git a/src/booking/migrations/0004_booking_ext_count.py b/src/booking/migrations/0004_booking_ext_count.py
new file mode 100644
index 0000000..6bcc3ce
--- /dev/null
+++ b/src/booking/migrations/0004_booking_ext_count.py
@@ -0,0 +1,27 @@
+##############################################################################
+# Copyright (c) 2018 Sawyer Bergeron and others.
+#
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+# http://www.apache.org/licenses/LICENSE-2.0
+##############################################################################
+
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('booking', '0003_auto_20180108_2024'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='booking',
+            name='ext_count',
+            field=models.IntegerField(default=2),
+        ),
+    ]
diff --git a/src/booking/models.py b/src/booking/models.py
index 9156484..8762d46 100644
--- a/src/booking/models.py
+++ b/src/booking/models.py
@@ -55,6 +55,7 @@ class Booking(models.Model):
     installer = models.ForeignKey(Installer, models.DO_NOTHING, null=True)
     scenario = models.ForeignKey(Scenario, models.DO_NOTHING, null=True)
     purpose = models.CharField(max_length=300, blank=False)
+    ext_count = models.IntegerField(default=2)
 
     class Meta:
         db_table = 'booking'
diff --git a/src/booking/views.py b/src/booking/views.py
index 7e35af2..a52cfe2 100644
--- a/src/booking/views.py
+++ b/src/booking/views.py
@@ -66,6 +66,11 @@ class BookingFormView(FormView):
                                  'You need to be logged in to book a Pod.')
             return super(BookingFormView, self).form_invalid(form)
 
+        if form.cleaned_data['end'] - form.cleaned_data['start'] > timezone.timedelta(days=21):
+            messages.add_message(self.request, messages.ERROR,
+                                 'Bookings can be no more than 3 weeks long.')
+            return super(BookingFormView, self).form_invalid(form)
+
         user = self.request.user
         booking = Booking(start=form.cleaned_data['start'],
                           end=form.cleaned_data['end'],
@@ -107,7 +112,7 @@ class BookingEditFormView(FormView):
     def get_context_data(self, **kwargs):
         title = 'Editing Booking on: ' + self.resource.name
         context = super(BookingEditFormView, self).get_context_data(**kwargs)
-        context.update({'title': title, 'resource': self.resource})
+        context.update({'title': title, 'resource': self.resource, 'booking': self.original_booking})
         return context
 
     def get_form_kwargs(self):
@@ -141,6 +146,19 @@ class BookingEditFormView(FormView):
             return super(BookingEditFormView, self).form_invalid(form)
 
         #Do Conflict Checks
+        if self.original_booking.end != form.cleaned_data['end']:
+            if form.cleaned_data['end'] - self.original_booking.end > timezone.timedelta(days=7):
+                messages.add_message(self.request, messages.ERROR,
+                                     'Extensions can not be longer than one week.')
+                return super(BookingEditFormView, self).form_invalid(form)
+            elif self.original_booking.ext_count <= 0:
+                messages.add_message(self.request, messages.ERROR,
+                                     'Cannot change end date after maximum number of extensions reached.')
+                return super(BookingEditFormView, self).form_invalid(form)
+
+            else:
+                self.original_booking.ext_count -= 1
+
         if self.original_booking.start != form.cleaned_data['start']:
             if timezone.now() > form.cleaned_data['start']:
                 messages.add_message(self.request, messages.ERROR,
@@ -205,4 +223,4 @@ class ResourceBookingsJSON(View):
         bookings = resource.booking_set.get_queryset().values('id', 'start', 'end', 'purpose',
                                                               'jira_issue_status', 'opsys__name',
                                                               'installer__name', 'scenario__name')
-        return JsonResponse({'bookings': list(bookings)})
\ No newline at end of file
+        return JsonResponse({'bookings': list(bookings)})