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 HttpResponse, HttpResponseGone
  12 from django.shortcuts import render
  13
  14 import uuid
  15
  16 from workflow.workflow_manager import ManagerTracker, SessionManager
  17
  18 import logging
  19 logger = logging.getLogger(__name__)
  20
  21
  22 def attempt_auth(request):
  23     try:
  24         manager = ManagerTracker.managers[request.session['manager_session']]
  25
  26         return manager
  27
  28     except KeyError:
  29         return None
  30
  31
  32 def delete_session(request):
  33     manager = attempt_auth(request)
  34
  35     if not manager:
  36         return HttpResponseGone("No session found that relates to current request")
  37
  38     if manager.pop_workflow():
  39         return HttpResponse('')
  40     else:
  41         del ManagerTracker.managers[request.session['manager_session']]
  42         return render(request, 'workflow/exit_redirect.html')
  43
  44     try:
  45         del ManagerTracker.managers[request.session['manager_session']]
  46         return HttpResponse('')
  47     except Exception:
  48         return None
  49
  50
  51 def step_view(request):
  52     manager = attempt_auth(request)
  53     if not manager:
  54         # no manager found, redirect to "lost" page
  55         return no_workflow(request)
  56     if request.GET.get('step') is not None:
  57         if request.GET.get('step') == 'next':
  58             manager.go_next()
  59         elif request.GET.get('step') == 'prev':
  60             manager.go_prev()
  61         else:
  62             raise Exception("requested action for new step had malformed contents: " + request.GET.get('step'))
  63     return manager.render(request)
  64
  65
  66 def manager_view(request):
  67     manager = attempt_auth(request)
  68
  69     if not manager:
  70         return HttpResponseGone("No session found that relates to current request")
  71
  72     if request.method == 'GET':
  73         # no need for this statement if only intercepting post requests
  74
  75         # return general context for viewport page
  76         return manager.status(request)
  77
  78     if request.method == 'POST':
  79         if request.POST.get('add') is not None:
  80             logger.debug("add found")
  81             target_id = None
  82             if 'target' in request.POST:
  83                 target_id = int(request.POST.get('target'))
  84             manager.add_workflow(workflow_type=int(request.POST.get('add')), target_id=target_id)
  85         elif request.POST.get('edit') is not None and request.POST.get('edit_id') is not None:
  86             logger.debug("edit found")
  87             manager.add_workflow(workflow_type=request.POST.get('edit'), edit_object=int(request.POST.get('edit_id')))
  88         elif request.POST.get('cancel') is not None:
  89             if not manager.pop_workflow():
  90                 del ManagerTracker.managers[request.session['manager_session']]
  91
  92     return manager.status(request)
  93
  94
  95 def viewport_view(request):
  96     if not request.user.is_authenticated:
  97         return login(request)
  98
  99     manager = attempt_auth(request)
 100     if manager is None:
 101         return no_workflow(request)
 102
 103     if request.method == 'GET':
 104         return render(request, 'workflow/viewport-base.html')
 105     else:
 106         pass
 107
 108
 109 def create_session(wf_type, request):
 110     wf = int(wf_type)
 111     smgr = SessionManager(request=request)
 112     smgr.add_workflow(workflow_type=wf, target_id=request.POST.get("target"))
 113     manager_uuid = uuid.uuid4().hex
 114     ManagerTracker.getInstance().managers[manager_uuid] = smgr
 115
 116     return manager_uuid
 117
 118
 119 def no_workflow(request):
 120
 121     logger.debug("There is no active workflow")
 122
 123     return render(request, 'workflow/no_workflow.html', {'title': "Not Found"})
 124
 125
 126 def login(request):
 127     return render(request, "dashboard/login.html", {'title': 'Authentication Required'})