# 349 LANIS link improvements

* replaces 'dumb' link template with LANIS mapinterface support
* adds fallback default LANIS link

konova/models/object.py

@@ -12,7 +12,7 @@ from abc import abstractmethod
 from django.contrib import messages
 from django.db.models import QuerySet
 
-from konova.sub_settings.lanis_settings import DEFAULT_SRID_RLP, LANIS_ZOOM_LUT, LANIS_LINK_TEMPLATE
+from konova.sub_settings.lanis_settings import LANIS_LINK_TEMPLATE, LANIS_LINK_DEFAULT
 from konova.tasks import celery_send_mail_shared_access_removed, celery_send_mail_shared_access_given, \
     celery_send_mail_shared_data_recorded, celery_send_mail_shared_data_unrecorded, \
     celery_send_mail_shared_data_deleted, celery_send_mail_shared_data_checked, \
@@ -706,32 +706,23 @@ class GeoReferencedMixin(models.Model):
         return request
 
     def get_LANIS_link(self) -> str:
-        """ Generates a link for LANIS depending on the geometry
+        """ Creates the link for 'LANIS' button on detail view of an entry.
 
         Returns:
 
         """
-        try:
-            geom = self.geometry.geom.transform(DEFAULT_SRID_RLP, clone=True)
-            x = geom.centroid.x
-            y = geom.centroid.y
-            area = int(geom.envelope.area)
-            z_l = 16
-            for k_area, v_zoom in LANIS_ZOOM_LUT.items():
-                if k_area < area:
-                    z_l = v_zoom
-                    break
-            zoom_lvl = z_l
-        except (AttributeError, IndexError) as e:
-            # If no geometry has been added, yet.
-            x = 1
-            y = 1
-            zoom_lvl = 6
-        return LANIS_LINK_TEMPLATE.format(
-            zoom_lvl,
-            x,
-            y,
-        )
+        entry_has_geometry = not self.geometry.geom.empty
+        if entry_has_geometry:
+            link = LANIS_LINK_TEMPLATE.format(
+                self.get_lanis_layer_name(),
+                self.identifier
+            )
+        else:
+            link = LANIS_LINK_DEFAULT
+        return link
+
+    def get_lanis_layer_name(self):
+        raise NotImplementedError("Must be implemented in subclasses!")
 
 
 class ResubmitableObjectMixin(models.Model):