dashboard/src/workflow/views.py

   1 ##############################################################################
   2 # Copyright (c) 2018 Parker Berberian, Sawyer Bergeron, and others.
   3 #
   4 # All rights reserved. This program and the accompanying materials
   5 # are made available under the terms of the Apache License, Version 2.0
   6 # which accompanies this distribution, and is available at
   7 # http://www.apache.org/licenses/LICENSE-2.0
   8 ##############################################################################
   9
  10
  11 from django.http import HttpResponseGone, JsonResponse
  12 from django.shortcuts import render
  13 from django.urls import reverse
  14
  15 import uuid
  16
  17 from workflow.workflow_manager import ManagerTracker, SessionManager
  18 from booking.models import Booking
  19
  20 import logging
  21 logger = logging.getLogger(__name__)
  22
  23
  24 def attempt_auth(request):
  25     try:
  26         manager = ManagerTracker.managers[request.session['manager_session']]
  27
  28         return manager
  29
  30     except KeyError:
  31         return None
  32
  33
  34 def get_redirect_response(result):
  35     if not result:
  36         return {}
  37
  38     # need to get type of result, and switch on the type
  39     # since has_result, result must be populated with a valid object
  40     if isinstance(result, Booking):
  41         return {
  42             'redir_url': reverse('booking:booking_detail', kwargs={'booking_id': result.id})
  43         }
  44     else:
  45         return {}
  46
  47
  48 def delete_session(request):
  49     manager = attempt_auth(request)
  50
  51     if not manager:
  52         return HttpResponseGone("No session found that relates to current request")
  53
  54     not_last_workflow, result = manager.pop_workflow()
  55
  56     if not_last_workflow:  # this was not the last workflow, so don't redirect away
  57         return JsonResponse({})
  58     else:
  59         del ManagerTracker.managers[request.session['manager_session']]
  60         return JsonResponse(get_redirect_response(result))
  61
  62
  63 def step_view(request):
  64     manager = attempt_auth(request)
  65     if not manager:
  66         # no manager found, redirect to "lost" page
  67         return no_workflow(request)
  68     if request.GET.get('step') is not None:
  69         if request.GET.get('step') == 'next':
  70             manager.go_next()
  71         elif request.GET.get('step') == 'prev':
  72             manager.go_prev()
  73         else:
  74             raise Exception("requested action for new step had malformed contents: " + request.GET.get('step'))
  75     return manager.render(request)
  76
  77
  78 def manager_view(request):
  79     manager = attempt_auth(request)
  80
  81     if not manager:
  82         return HttpResponseGone("No session found that relates to current request")
  83
  84     if request.method == 'GET':
  85         # no need for this statement if only intercepting post requests
  86
  87         # return general context for viewport page
  88         return manager.status(request)
  89
  90     if request.method == 'POST':
  91         if request.POST.get('add') is not None:
  92             logger.debug("add found")
  93             target_id = None
  94             if 'target' in request.POST:
  95                 target_id = int(request.POST.get('target'))
  96             manager.add_workflow(workflow_type=int(request.POST.get('add')), target_id=target_id)
  97         elif request.POST.get('edit') is not None and request.POST.get('edit_id') is not None:
  98             logger.debug("edit found")
  99             manager.add_workflow(workflow_type=request.POST.get('edit'), edit_object=int(request.POST.get('edit_id')))
 100         elif request.POST.get('cancel') is not None:
 101             if not manager.pop_workflow():
 102                 del ManagerTracker.managers[request.session['manager_session']]
 103
 104     return manager.status(request)
 105
 106
 107 def viewport_view(request):
 108     if not request.user.is_authenticated:
 109         return login(request)
 110
 111     manager = attempt_auth(request)
 112     if manager is None:
 113         return no_workflow(request)
 114
 115     if request.method == 'GET':
 116         return render(request, 'workflow/viewport-base.html')
 117     else:
 118         pass
 119
 120
 121 def create_session(wf_type, request):
 122     wf = int(wf_type)
 123     smgr = SessionManager(request=request)
 124     smgr.add_workflow(workflow_type=wf, target_id=request.POST.get("target"))
 125     manager_uuid = uuid.uuid4().hex
 126     ManagerTracker.getInstance().managers[manager_uuid] = smgr
 127
 128     return manager_uuid
 129
 130
 131 def no_workflow(request):
 132
 133     logger.debug("There is no active workflow")
 134
 135     return render(request, 'workflow/no_workflow.html', {'title': "Not Found"})
 136
 137
 138 def login(request):
 139     return render(request, "dashboard/login.html", {'title': 'Authentication Required'})