Process Smaller Batches of doc split by headers

function splitDocumentByH1Incremental() {
  const docId = "YOUR_DOCUMENT_ID"; // Replace with your Document ID
  const folderId = "YOUR_FOLDER_ID"; // Replace with the target folder ID

  const scriptProperties = PropertiesService.getScriptProperties();
  const startIndex = parseInt(scriptProperties.getProperty("lastProcessedIndex") || "0", 10);

  const doc = DocumentApp.openById(docId);
  const body = doc.getBody();
  const paragraphs = body.getParagraphs();

  const targetFolder = DriveApp.getFolderById(folderId);
  let newDoc = null, newDocBody = null;
  let currentTitle = "";
  let inSection = false;

  for (let i = startIndex; i < paragraphs.length; i++) {
    const paragraph = paragraphs[i];
    const style = paragraph.getHeading();

    // Check for H1 heading to start a new section
    if (style === DocumentApp.ParagraphHeading.HEADING1) {
      if (newDoc) {
        newDoc.saveAndClose();
        const newDocFile = DriveApp.getFileById(newDoc.getId());
        targetFolder.addFile(newDocFile);
        DriveApp.getRootFolder().removeFile(newDocFile);
      }

      currentTitle = paragraph.getText();
      newDoc = DocumentApp.create(currentTitle);
      newDocBody = newDoc.getBody();
      inSection = true;
    }

    if (inSection && newDocBody) {
      const copiedElement = paragraph.copy();
      newDocBody.appendParagraph(copiedElement.getText())
        .setAttributes(paragraph.getAttributes());
    }

    // Save progress every 50 paragraphs to avoid timeout
    if (i % 50 === 0) {
      scriptProperties.setProperty("lastProcessedIndex", i);
      return; // Stop and allow re-execution
    }
  }

  if (newDoc) {
    newDoc.saveAndClose();
    const newDocFile = DriveApp.getFileById(newDoc.getId());
    targetFolder.addFile(newDocFile);
    DriveApp.getRootFolder().removeFile(newDocFile);
  }

  scriptProperties.deleteProperty("lastProcessedIndex");
  Logger.log(`Document split successfully.`);
}