chatgpt-download.js

function getDatabase (name = 'ConversationsDatabase') {
  const req = window.indexedDB.open(name)
  return new Promise((resolve, reject) => {
    req.onsuccess = e => resolve(req.result)
    req.onerror = req.onabort = reject
  })
}

function getAllKeys (db, collection = 'conversations') {
  const req = db.transaction([collection], 'readonly').objectStore(collection).getAllKeys()
  return new Promise((resolve, reject) => {
    req.onsuccess = e => resolve(req.result)
    req.onerror = req.onabort = reject
  })
}

function getByKey (db, key, collection = 'conversations') {
  const req = db.transaction([collection], 'readonly').objectStore(collection).get(key)
  return new Promise((resolve, reject) => {
    req.onsuccess = e => resolve(req.result)
    req.onerror = req.onabort = reject
  })
}

function fileName (path) {
  return path.slice(path.lastIndexOf('/') + 1)
}

let database

getDatabase()
  .then(db => {
    database = db
    return getAllKeys(db)
  })
  .then(keys => {
    return Promise.all(keys.map(k => getByKey(database, k)))
  })
  .then(all => {
    const link = document.createElement('a')
    const blob = new Blob([JSON.stringify(all, null, '  ')], { type: 'application/json' } )
    link.href = URL.createObjectURL(blob)
    link.download = fileName("conversations.json")
    link.click()
  })