Only show export if a user has annotated a volume.

This adds the logged-in user's ID to the annotation table in `owner_id`,
recording the ownership of each annotation.  It then uses this to
determine whether or not to display the "Export" button on the volume
home page.

apps/iiif/canvases/views.py

@@ -30,9 +30,11 @@ def post(self, request, *args, **kwargs):
         payload = json.loads(request.body.decode('utf-8'))
         oa_annotation = json.loads(payload['oa_annotation'])
         canvas = Canvas.objects.get(pid=oa_annotation['on'][0]['full'].split('/')[-1])
+        user_id = request.user.id
         annotation = Annotation()
         annotation.canvas = canvas
         annotation.oa_annotation = oa_annotation
+        annotation.owner_id = user_id
         annotation.save()
         return JsonResponse(oa_annotation, safe=False)
 

apps/readux/views.py

@@ -5,6 +5,7 @@
 from ..iiif.kollections.models import Collection
 from ..iiif.canvases.models import Canvas
 from ..iiif.manifests.models import Manifest
+from ..iiif.annotations.models import Annotation
 
 
 class CollectionsList(ListView):
@@ -61,7 +62,9 @@ class PageDetail(TemplateView):
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
         context['page'] = Canvas.objects.filter(pid=kwargs['page']).first()
-        context['volume'] = Manifest.objects.filter(pid=kwargs['volume']).first()
+        manifest = Manifest.objects.filter(pid=kwargs['volume']).first()
+        context['volume'] = manifest
+        context['user_annotation_count'] = Annotation.objects.filter(owner_id=self.request.user.id).filter(canvas__manifest__id=manifest.id).count()
         return context
 
 class ExportOptions(TemplateView):

apps/templates/export.html

@@ -6,9 +6,10 @@
 
 {% block content %}
 
-<h1> NEW EXPORT PAGE</h1>
+<h1>{{request.user.id}}</h1>
 <h1 class='uk-text-truncate'>
-  {{volume.label}}
+  {{volume.label}}    
+
 </h1>
 {% endblock content %}
 {% block viewer %}

apps/templates/page.html

@@ -53,7 +53,9 @@ <h1 class='uk-text-truncate'>
         <br />
         <b>Stable page URL:</b> <span class="link" id="mySpan"></span>
         <br />
+        {% if user_annotation_count > 0 %}
         <form action="{% url 'export' col.pid volume.pid %}" class="button_to" method="GET"><div><input type="submit" value="Export" title="Export in a variety of formats"/>{% csrf_token %}</div></form>
+        {% endif %}
 <!-- 
         <p id="test"></p>
         <a class="facebook" href='http://www.facebook.com/sharer.php?s=100&p[url]=http://{{ request.META.HTTP_HOST }}{{ request.path }}&p[images][0]{{ page.IIIF_IMAGE_SERVER_BASE }}{{ page.pid }}/full/600,/0/default.jpg' target="_blank">