feat: implement wrappers for more endpoints

src/bibapi/schemas/bookdata.py

@@ -82,10 +82,12 @@ class BookData:
             setattr(self, key, value)
 
     def get_book_type(self) -> str:
-        if "Online" in self.pages:
-            return "eBook"
-        else:
-            return "Druckausgabe"
+        if isinstance(self.media_type, str):
+            if "Online" in self.pages:
+                return "eBook"
+            else:
+                return "Druckausgabe"
+        return None
 
     def from_string(self, data: str) -> "BookData":
         ndata = json.loads(data)

src/bibapi/schemas/marcxml.py

@@ -54,3 +54,15 @@ class SearchRetrieveResponse:
     numberOfRecords: int
     records: List[Record] = field(default_factory=list)
     echoedSearchRetrieveRequest: Optional[EchoedSearchRequest] = None
+
+
+@dataclass
+class FormattedResponse:
+    title: str
+    edition: Optional[str] = None
+    publisher: Optional[str] = None
+    year: Optional[str] = None
+    authors: List[str] = field(default_factory=list)
+    isbn: List[str] = field(default_factory=list)
+    ppn: Optional[str] = None
+    libraries: List[str] = field(default_factory=list)