#50 Overlaying geometries

* refactors geometry field into GeoReferencedMixin, holding more handy methods and used in all models, formerly holding the geometry field
* refactors backend admin configuration, so modified, deleted and created are not editable in the backend which also skips loading of all possible choices
* fixes typo in sanitize_db command
* introduces GeometryConflict model, holding a link between two geometries, where one overlaps the other
* adds first (WIP) messages into detail views of ema and intervention for test purposes

ema/models/ema.py

@@ -7,15 +7,17 @@ Created on: 15.11.21
 """
 import shutil
 
-from django.contrib.auth.models import User
+from django.contrib import messages
 from django.db import models
 from django.db.models import QuerySet
+from django.http import HttpRequest
 
 from compensation.models import AbstractCompensation
 from ema.managers import EmaManager
 from ema.utils.quality import EmaQualityChecker
 from konova.models import AbstractDocument, generate_document_file_upload_path, RecordableObjectMixin, ShareableObjectMixin
 from konova.settings import DEFAULT_SRID_RLP, LANIS_LINK_TEMPLATE
+from konova.utils.message_templates import DATA_UNSHARED_EXPLANATION
 
 
 class Ema(AbstractCompensation, ShareableObjectMixin, RecordableObjectMixin):
@@ -91,6 +93,13 @@ class Ema(AbstractCompensation, ShareableObjectMixin, RecordableObjectMixin):
         )
         return docs
 
+    def set_status_messages(self, request: HttpRequest):
+        if not self.is_shared_with(request.user):
+            messages.info(request, DATA_UNSHARED_EXPLANATION)
+        self._set_overlapped_by_message(request)
+        self._set_overlapping_message(request)
+        return request
+
 
 class EmaDocument(AbstractDocument):
     """

ema/views.py

@@ -138,8 +138,7 @@ def detail_view(request: HttpRequest, id: str):
     sum_after_states = after_states.aggregate(Sum("surface"))["surface__sum"] or 0
     diff_states = abs(sum_before_states - sum_after_states)
 
-    if not is_data_shared:
-        messages.info(request, DATA_UNSHARED_EXPLANATION)
+    ema.set_status_messages(request)
 
     context = {
         "obj": ema,