i18n: refine Slovak linked nodes and localize validation errors

AppImage/scripts/flask_monitor_links_routes.py

@@ -7,6 +7,13 @@ from jwt_middleware import require_auth, require_admin_scope
 monitor_links_bp = Blueprint("monitor_links", __name__)
 
 
+def link_error(exc):
+    payload = {"error": str(exc), "code": exc.code}
+    if exc.params:
+        payload["params"] = exc.params
+    return jsonify(payload), 400
+
+
 @monitor_links_bp.after_request
 def no_cache(response):
     response.headers["Cache-Control"] = "no-store"
@@ -27,9 +34,9 @@ def add_link():
         monitor_links.refresh()
         return jsonify(success=True, key=key)
     except monitor_links.LinkError as exc:
-        return jsonify(error=str(exc)), 400
+        return link_error(exc)
     except OSError:
-        return jsonify(error="Could not save the node list."), 500
+        return jsonify(error="Could not save the node list.", code="monitor_links_save_failed"), 500
 
 
 @monitor_links_bp.route("/api/monitor-links/<path:key>", methods=["PATCH"])
@@ -40,9 +47,9 @@ def update_link(key):
         monitor_links.refresh()
         return jsonify(success=True)
     except monitor_links.LinkError as exc:
-        return jsonify(error=str(exc)), 400
+        return link_error(exc)
     except OSError:
-        return jsonify(error="Could not save the node list."), 500
+        return jsonify(error="Could not save the node list.", code="monitor_links_save_failed"), 500
 
 
 @monitor_links_bp.route("/api/monitor-links/<path:key>", methods=["DELETE"])
@@ -53,6 +60,6 @@ def delete_link(key):
         monitor_links.refresh()
         return jsonify(success=True)
     except monitor_links.LinkError as exc:
-        return jsonify(error=str(exc)), 400
+        return link_error(exc)
     except OSError:
-        return jsonify(error="Could not save the node list."), 500
+        return jsonify(error="Could not save the node list.", code="monitor_links_save_failed"), 500