ai-labs-team/casium-devtools

import { display } from './Notifier';
import { UploadResult, applyDeltas } from './util';

export { readFile, upload } from './util';

/**
 * 'Replays' a message log by using the 'time travel' feature to set the
 * application state to the last message found in a JSON message log file.
 */
export const importLog = (src: Promise<UploadResult>) => src.then(({ filename, content }) => {
  const log: any = JSON.parse(content);

  if (log.version === '1') {
    const { initial, messages } = log;
    const setState = applyDeltas(initial, messages);

    window.messageClient({ setState });

    display({
      type: 'success',
      title: 'Successfully replayed message log',
      message: `Application state now matches the last message recorded in log '${filename}'`
    });

    return { initial, messages };
  }

  throw new Error('Unknown Message Log format/version');
})
.catch(err => {
  display({
    type: 'error',
    title: 'Failed to replay message log',
    message: 'The file that you attempted to import could not be replayed:',
    code: err.toString()
  });

  throw err;
});