Fix CERN DOI prefix metadata check

scripts/metadata_checks.py

@@ -20,6 +20,7 @@
 from invenio_communities.proxies import current_communities
 from invenio_db import db
 from werkzeug.local import LocalProxy
+from flask import current_app
 
 community_service = LocalProxy(lambda: current_communities.service)
 
@@ -50,10 +51,43 @@
                 }
             ],
         },
+        {
+            "id": "cern:doi/prefix-community",
+            "title": "CERN DOI prefix required",
+            "message": "Records with publisher CERN must use the CERN DOI prefix.",
+            "description": "Ensures records published by CERN use the configured DataCite prefix when a DOI is provided.",
+            "level": "error",
+            "error_path": "pids.doi",
+            "condition": {
+                "type": "logical",
+                "operator": "and",
+                "expressions": [
+                    {
+                        "type": "comparison",
+                        "left": {"type": "field", "path": "metadata.publisher"},
+                        "operator": "==",
+                        "right": "CERN",
+                    },
+                    {
+                        "type": "comparison",
+                        "left": {"type": "field", "path": "pids.doi.identifier"},
+                        "operator": "!=",
+                        "right": "",
+                    },
+                ],
+            },
+            "checks": [
+                {
+                    "type": "comparison",
+                    "left": {"type": "field", "path": "pids.doi.identifier"},
+                    "operator": "^=",
+                    "right": current_app.config["DATACITE_PREFIX"],
+                }
+            ],
+        },
     ]
 }
 
-from flask import current_app
 
 CDS_CERN_SCIENTIFIC_COMMUNITY_ID = current_app.config[
     "CDS_CERN_SCIENTIFIC_COMMUNITY_ID"