chore: extract marcxml dataclasses from SRU classes and move to schemas folder

src/bibapi/schemas/marcxml.py

@@ -0,0 +1,56 @@
+from dataclasses import dataclass, field
+from typing import List, Optional
+
+
+# --- MARC XML structures ---
+@dataclass
+class ControlField:
+    tag: str
+    value: str
+
+
+@dataclass
+class SubField:
+    code: str
+    value: str
+
+
+@dataclass
+class DataField:
+    tag: str
+    ind1: str = " "
+    ind2: str = " "
+    subfields: List[SubField] = field(default_factory=list)
+
+
+@dataclass
+class MarcRecord:
+    leader: str
+    controlfields: List[ControlField] = field(default_factory=list)
+    datafields: List[DataField] = field(default_factory=list)
+
+
+# --- SRU record wrapper ---
+@dataclass
+class Record:
+    recordSchema: str
+    recordPacking: str
+    recordData: MarcRecord
+    recordPosition: int
+
+
+@dataclass
+class EchoedSearchRequest:
+    version: str
+    query: str
+    maximumRecords: int
+    recordPacking: str
+    recordSchema: str
+
+
+@dataclass
+class SearchRetrieveResponse:
+    version: str
+    numberOfRecords: int
+    records: List[Record] = field(default_factory=list)
+    echoedSearchRetrieveRequest: Optional[EchoedSearchRequest] = None