from django.contrib.auth.models import User from django.db import models from jira import JIRA from jira import JIRAError from dashboard.models import Resource from django.conf import settings class Booking(models.Model): id = models.AutoField(primary_key=True) user = models.ForeignKey(User, models.CASCADE) # delete if user is deleted resource = models.ForeignKey(Resource, models.PROTECT) start = models.DateTimeField() end = models.DateTimeField() jira_issue_id = models.IntegerField(null=True) jira_issue_status = models.CharField(max_length=50) purpose = models.CharField(max_length=300, blank=False) class Meta: db_table = 'booking' def get_jira_issue(self): try: jira = JIRA(server=settings.JIRA_URL, basic_auth=(settings.JIRA_USER_NAME, settings.JIRA_USER_PASSWORD)) issue = jira.issue(self.jira_issue_id) return issue except JIRAError: return None def authorization_test(self): """ Return True if self.user is authorized to make this booking. """ user = self.user # Check if User is troubleshooter / admin if user.has_perm('booking.add_booking'): return True # Check if User owns this resource if user == self.resource.owner: return True return False def save(self, *args, **kwargs): """ Save the booking if self.user is authorized and there is no overlapping booking. Raise PermissionError if the user is not authorized Raise ValueError if there is an overlapping booking """ if not self.authorization_test(): raise PermissionError('Insufficient permissions to save this booking.') if self.start >= self.end: raise ValueError('Start date is after end date') # conflicts end after booking starts, and start before booking ends conflicting_dates = Booking.objects.filter(resource=self.resource).exclude(id=self.id) conflicting_dates = conflicting_dates.filter(end__gt=self.start) conflicting_dates = conflicting_dates.filter(start__lt=self.end) if conflicting_dates.count() > 0: raise ValueError('This booking overlaps with another booking') return super(Booking, self).save(*args, **kwargs) def __str__(self): return str(self.resource) + ' from ' + str(self.start) + ' until ' + str(self.end)