Add normalizeDescription function, fix OL description

Author: jacobtender

src/extractors/openlibrary.js

@@ -1,5 +1,5 @@
 import { Extractor } from "./AbstractExtractor.js"
-import { addContributor, collectObject, getCoverData, normalizeReadingFormat, remapKeys } from "../shared/utils.js";
+import { addContributor, collectObject, getCoverData, normalizeDescription, normalizeReadingFormat, remapKeys } from "../shared/utils.js";
 
 // references:
 //  https://openlibrary.org/dev/docs/api/books
@@ -83,7 +83,10 @@ async function getDetails(idUrl) {
     details["Title"] = data["title"];
   }
   if ("description" in data) {
-    details["Description"] = data["description"];
+    const description = normalizeDescription(data["description"]);
+    if (description) {
+      details["Description"] = description;
+    }
   }
   if ("identifiers" in data) {
     Object.entries(data["identifiers"]).forEach(([k, v]) => {

src/shared/utils.js

@@ -227,6 +227,16 @@ export function remapKeys(mapping, object) {
   return newObj;
 }
 
+export function normalizeDescription(description) {
+  if (typeof description === "string") return description;
+  if (Array.isArray(description)) return normalizeDescription(description[0]);
+  if (description && typeof description === "object") {
+    if (typeof description.value === "string") return description.value;
+    if (typeof description.text === "string") return description.text;
+  }
+  return "";
+}
+
 /**
  * @typedef {{name: string, roles: string[]}} contributor
  */