Method parseTocNavFile

lib/Epub/Epub.cpp:203–259

}

bool Epub::parseTocNavFile() const {
  // the nav file should have been specified in the content.opf file (EPUB 3)
  if (tocNavItem.empty()) {
    LOG_DBG("EBP", "No nav file specified");
    return false;
  }

  LOG_DBG("EBP", "Parsing toc nav file: %s", tocNavItem.c_str());

  const auto tmpNavPath = getCachePath() + "/toc.nav";
  HalFile tempNavFile;
  if (!Storage.openFileForWrite("EBP", tmpNavPath, tempNavFile)) {
    return false;
  }
  readItemContentsToStream(tocNavItem, tempNavFile, 1024);
  // Explicitly close() file before reopening for reading
  tempNavFile.close();
  if (!Storage.openFileForRead("EBP", tmpNavPath, tempNavFile)) {
    return false;
  }
  const auto navSize = tempNavFile.size();

  // Note: We can't use `contentBasePath` here as the nav file may be in a different folder to the content.opf
  // and the HTMLX nav file will have hrefs relative to itself
  const std::string navContentBasePath = tocNavItem.substr(0, tocNavItem.find_last_of('/') + 1);
  TocNavParser navParser(navContentBasePath, navSize, bookMetadataCache.get());

  if (!navParser.setup()) {
    LOG_ERR("EBP", "Could not setup toc nav parser");
    return false;
  }

  const auto navBuffer = static_cast<uint8_t*>(malloc(1024));
  if (!navBuffer) {
    LOG_ERR("EBP", "Could not allocate memory for toc nav parser");
    return false;
  }

  while (tempNavFile.available()) {
    const auto readSize = tempNavFile.read(navBuffer, 1024);
    const auto processedSize = navParser.write(navBuffer, readSize);

    if (processedSize != readSize) {
      LOG_ERR("EBP", "Could not process all toc nav data");
      free(navBuffer);
      return false;
    }
  }

  free(navBuffer);
  // Explicitly close() file before calling Storage.remove()
  tempNavFile.close();
  Storage.remove(tmpNavPath.c_str());

  LOG_DBG("EBP", "Parsed TOC nav items");
  return true;
}