Load core metadata when loading book.bin

lib/Epub/Epub/BookMetadataCache.cpp

@@ -106,15 +106,17 @@ bool BookMetadataCache::buildBookBin(const std::string& epubPath, const BookMeta
   // Loop through spine entries, writing LUT positions
   spineFile.seek(0);
   for (int i = 0; i < spineCount; i++) {
+    auto pos = spineFile.position();
     auto spineEntry = readSpineEntry(spineFile);
-    serialization::writePod(bookFile, spineFile.position() + lutOffset + lutSize);
+    serialization::writePod(bookFile, pos + lutOffset + lutSize);
   }
 
   // Loop through toc entries, writing LUT positions
   tocFile.seek(0);
   for (int i = 0; i < tocCount; i++) {
+    auto pos = tocFile.position();
     auto tocEntry = readTocEntry(tocFile);
-    serialization::writePod(bookFile, tocFile.position() + lutOffset + lutSize + spineFile.position());
+    serialization::writePod(bookFile, pos + lutOffset + lutSize + spineFile.position());
   }
 
   // LUTs complete
@@ -258,6 +260,10 @@ bool BookMetadataCache::load() {
   serialization::readPod(bookFile, spineCount);
   serialization::readPod(bookFile, tocCount);
 
+  serialization::readString(bookFile, coreMetadata.title);
+  serialization::readString(bookFile, coreMetadata.author);
+  serialization::readString(bookFile, coreMetadata.coverItemHref);
+
   loaded = true;
   Serial.printf("[%lu] [BMC] Loaded cache data: %d spine, %d TOC entries\n", millis(), spineCount, tocCount);
   return true;