Fix string index

Flashbacks to my java days...

RIGS/migrations/0050_event_forum_url.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.2.18 on 2023-06-26 17:46
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('RIGS', '0049_auto_20230529_1123'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='event',
+            name='forum_url',
+            field=models.URLField(blank=True, null=True),
+        ),
+    ]

RIGS/models.py

@@ -357,6 +357,8 @@ class Event(models.Model, RevisionMixin):
     auth_request_at = models.DateTimeField(null=True, blank=True)
     auth_request_to = models.EmailField(blank=True, default='')
 
+    forum_url = models.URLField(null=True, blank=True)
+
     @property
     def display_id(self):
         if self.pk:

RIGS/templates/partials/event_details.html

@@ -77,6 +77,15 @@
                 <dt class="col-sm-6">PO</dt>
                 <dd class="col-sm-6">{{ object.purchase_order }}</dd>
             {% endif %}
+
+            <dt class="col-6">Forum Thread</dt>
+            {% if event.forum_thread %}
+            <dd class="col-6"><a href="{{event.forum_thread}}">{{event.forum_thread}}</a></dd>
+            {% else %}
+            <a href="{% url 'event_thread' event.pk %}" class="btn btn-primary" title="Create Forum Thread"><span
+            class="fas fa-plus"></span> <span
+            class="hidden-xs">Create Forum Thread</span></a>
+            {% endif %}
         </dl>
     </div>
 </div>

RIGS/urls.py

@@ -110,6 +110,9 @@ urlpatterns = [
     path('event/<int:pk>/checkin/add/', login_required(views.EventCheckInOverride.as_view()),
          name='event_checkin_override'),
 
+    path('event/<int:pk>/thread/', permission_required_with_403('RIGS.change_event')(views.CreateForumThread.as_view()), name='event_thread'),
+    path('event/webhook/', views.RecieveForumWebhook.as_view(), name='webhook_recieve'),
+
     # Finance
     path('invoice/', permission_required_with_403('RIGS.view_invoice')(views.InvoiceIndex.as_view()),
          name='invoice_list'),

RIGS/views/rigboard.py

@@ -3,6 +3,12 @@ import datetime
 import re
 import premailer
 import simplejson
+import urllib
+import hmac
+import hashlib
+
+from envparse import env
+from bs4 import BeautifulSoup
 
 from django.conf import settings
 from django.contrib import messages
@@ -19,6 +25,7 @@ from django.urls import reverse_lazy
 from django.utils import timezone
 from django.utils.decorators import method_decorator
 from django.views import generic
+from django.views.decorators.csrf import csrf_exempt
 
 from PyRIGS import decorators
 from PyRIGS.views import OEmbedView, is_ajax, ModalURLMixin, PrintView, get_related
@@ -377,3 +384,40 @@ class EventAuthoriseRequestEmailPreview(generic.DetailView):
         context['to_name'] = self.request.GET.get('to_name', None)
         context['target'] = 'event_authorise_form_preview'
         return context
+
+
+class CreateForumThread(generic.base.RedirectView):
+    permanent = False
+
+    def get_redirect_url(self, *args, **kwargs):
+        event = get_object_or_404(models.Event, pk=kwargs['pk'])
+
+        if event.forum_url:
+            return event.forum_url
+
+        params = {
+            'title': str(event),
+            'body': f'https://rigs.nottinghamtec.co.uk/event/{event.pk}',
+            'category': 'rig-info'
+        }
+        return f'https://forum.nottinghamtec.co.uk/new-topic?{urllib.parse.urlencode(params)}'
+
+
+class RecieveForumWebhook(generic.View):
+    @method_decorator(csrf_exempt)
+    def dispatch(self, request, *args, **kwargs):
+        return super().dispatch(request, *args, **kwargs)
+
+    def post(self, request, *args, **kwargs):
+        computed = f"sha256={hmac.new(env('FORUM_WEBHOOK_SECRET').encode(), request.body, hashlib.sha256).hexdigest()}"
+        print(computed)
+        if not hmac.compare_digest(request.headers.get('X-Discourse-Event-Signature'), computed):
+            return HttpResponseForbidden('Invalid signature header')
+        body = simplejson.loads(request.body.decode('utf-8'))
+        event_id = int(body['topic']['title'][1:6]) # find the ID, force convert it to an int to eliminate leading zeros
+        event = models.Event.objects.filter(pk=event_id).first()
+        if event:
+            event.forum_url = f"https://forum.nottinghamtec.co.uk/t/{body['topic']['slug']}"
+            event.save()
+            return HttpResponse(status=202)
+        return HttpResponse(status=204)