Prevent deleting features with Wikidata tags (close #5853)

data/core.yaml

@@ -146,6 +146,9 @@ en:
       connected_to_hidden:
         single: This feature can't be deleted because it is connected to a hidden feature.
         multiple: These features can't be deleted because some are connected to hidden features.
+      has_wikidata_tag:
+        single: This feature can't be deleted because it has a Wikidata tag.
+        multiple: These feature can't be deleted because some have Wikidata tags.
     add_member:
       annotation: Added a member to a relation.
     delete_member:

dist/locales/en.json

@@ -185,6 +185,10 @@
                 "connected_to_hidden": {
                     "single": "This feature can't be deleted because it is connected to a hidden feature.",
                     "multiple": "These features can't be deleted because some are connected to hidden features."
+                },
+                "has_wikidata_tag": {
+                    "single": "This feature can't be deleted because it has a Wikidata tag.",
+                    "multiple": "These feature can't be deleted because some have Wikidata tags."
                 }
             },
             "add_member": {

modules/operations/delete.js

@@ -76,9 +76,16 @@ export function operationDelete(selectedIDs, context) {
             reason = 'part_of_relation';
         } else if (selectedIDs.some(incompleteRelation)) {
             reason = 'incomplete_relation';
+        } else if (selectedIDs.some(hasWikidataTag)) {
+            reason = 'has_wikidata_tag';
         }
         return reason;
 
+        function hasWikidataTag(id) {
+            var entity = context.entity(id);
+            return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
+        }
+
         function incompleteRelation(id) {
             var entity = context.entity(id);
             return entity.type === 'relation' && !entity.isComplete(context.graph());