// @flow
import { Document, User, Event, Revision } from "../models";
import { sequelize } from "../sequelize";

export default async function revisionCreator({
  document,
  user,
  ip,
}: {
  document: Document,
  user: User,
  ip?: string,
}) {
  let transaction;

  try {
    transaction = await sequelize.transaction();

    const revision = await Revision.createFromDocument(document, {
      transaction,
    });

    await Event.create(
      {
        name: "revisions.create",
        documentId: document.id,
        modelId: revision.id,
        teamId: document.teamId,
        actorId: user.id,
        createdAt: document.updatedAt,
        ip: ip || user.lastActiveIp,
      },
      { transaction }
    );
    await transaction.commit();

    return revision;
  } catch (err) {
    if (transaction) {
      await transaction.rollback();
    }
    throw err;
  }
}