feat(DNBApi): add api from deutsche national bibliothek

frontend/src/pages/Main/utils/tryDeutscheNationalBibliothekApi.ts

@@ -0,0 +1,29 @@
+import { XMLParser } from "fast-xml-parser";
+import { Book } from "../../../types/Book";
+
+export const tryDeutscheNationalBibliothekApi = async (
+  isbn: string
+): Promise<Pick<Book, "published" | "title"> | undefined> => {
+  const parser = new XMLParser();
+
+  const foundBooks = parser.parse(
+    await (
+      await fetch(
+        "https://services.dnb.de/sru/dnb?version=1.1&operation=searchRetrieve&query=" +
+          isbn
+      )
+    ).text()
+  );
+  const foundBook =
+    foundBooks.searchRetrieveResponse?.records?.record?.recordData?.[
+      "rdf:RDF"
+    ]?.["rdf:Description"];
+
+  if (!!foundBook) {
+    return {
+      published: foundBook["dcterms:issued"],
+      title: foundBook["dc:title"],
+    };
+  }
+  return undefined;
+};