add matching using similar types

Author: Kraysent

app/crossmatch/layered/object_type.py

@@ -5,6 +5,15 @@
 )
 from app.crossmatch.models import PendingReason, RecordEvidence
 
+SIMILAR_TYPE_MAP = {
+    "G": {"ext", "?", "QSO"},
+    "ext": {"G", "?", "QSO"},
+}
+
+
+def _types_match(record_type: str, other_type: str) -> bool:
+    return record_type == other_type or other_type in SIMILAR_TYPE_MAP.get(record_type, set())
+
 
 def object_type_resolver(
     evidence: RecordEvidence, previous_result: PreliminaryCrossmatchStatus
@@ -21,15 +30,17 @@ def object_type_resolver(
         neighbor = next((n for n in evidence.neighbors if n.pgc == previous_result.pgc), None)
         existing_type = neighbor.type_name if neighbor is not None else None
 
-        if existing_type is not None and record_type != existing_type:
+        if existing_type is not None and not _types_match(record_type, existing_type):
             return previous_result, PendingReason.TYPE_MISMATCH
 
         return previous_result, None
 
     same_type_neighbors = [
         n
         for n in evidence.neighbors
-        if n.pgc in previous_result.pgcs and record_type is not None and n.type_name == record_type
+        if n.pgc in previous_result.pgcs
+        and n.type_name is not None
+        and _types_match(record_type, n.type_name)
     ]
     if len(same_type_neighbors) == 1:
         return PreliminaryCrossmatchStatusExisting(same_type_neighbors[0].pgc), None