adding a transform layer to block view

templates/djeocad/includes/layer_update.html

@@ -28,8 +28,8 @@ <h4 class="card-title">
       </form>
     </div>
   </div>
-  {% if object.is_block %}
-    <div class="mx-auto" style="max-width: 480px; margin-top: 20px">
+  <div class="mx-auto" style="max-width: 480px; margin-top: 20px">
+    {% if object.is_block %}
       <h4>{% trans "Instances" %}:</h4>
       {% if object.instances %}
         {% for insert in object.instances.all %}
@@ -42,6 +42,12 @@ <h4>{% trans "Instances" %}:</h4>
         href="{% url 'djeocad:insert_create' username=object.drawing.user.username pk=object.id %}">
         {% trans "Add instance" %}
       </a>
-    </div>
-  {% endif %}
+    {% else %}
+      <a class="btn btn-success"
+        href="{% url 'djeocad:layer_to_block' username=object.drawing.user.username pk=object.id %}"
+      >
+        {% trans "Transform layer to block" %}
+      </a>
+    {% endif %}
+  </div>
 {% endblock content %}

urls.py

@@ -15,6 +15,7 @@
     LayerCreateView,
     LayerDeleteInlineView,
     LayerDetailView,
+    LayerToBlockView,
     LayerUpdateView,
     drawing_download,
 )
@@ -58,6 +59,11 @@
         LayerUpdateView.as_view(),
         name="layer_update",
     ),
+    path(
+        _("<username>/layer/<pk>/to/block/"),
+        LayerToBlockView.as_view(),
+        name="layer_to_block",
+    ),
     path(
         _("<username>/block/<pk>/instance/add/"),
         InsertionCreateView.as_view(),

views.py

@@ -308,6 +308,26 @@ def get_success_url(self):
         )
 
 
+class LayerToBlockView(PermissionRequiredMixin, RedirectView):
+    permission_required = "djeocad.change_layer"
+
+    def setup(self, request, *args, **kwargs):
+        super(LayerToBlockView, self).setup(request, *args, **kwargs)
+        get_object_or_404(User, username=self.kwargs["username"])
+        self.layer = get_object_or_404(Layer, id=self.kwargs["pk"])
+        if request.user != self.layer.drawing.user:
+            raise PermissionDenied
+
+    def get_redirect_url(self, *args, **kwargs):
+        return reverse(
+            "djeocad:drawing_detail",
+            kwargs={
+                "username": self.kwargs["username"],
+                "pk": self.layer.drawing.id,
+            },
+        )
+
+
 class LayerDeleteInlineView(PermissionRequiredMixin, TemplateView):
     permission_required = "djeocad.delete_layer"
     template_name = "djeocad/htmx/item_delete.html"