import Database from "../index";
var tfun = require("transfun/transfun.js").tfun;
if (!tfun) {
  tfun = global.tfun;
}

class Prepare {
  /**
   *
   * @param {Database} db
   */
  constructor(db) {
    this._db = db;
  }

  async get(lastSyncedTimestamp) {
    this._lastSyncedTimestamp = lastSyncedTimestamp;
    return {
      notes: this._prepareForServer(this._db.notes.raw),
      notebooks: this._prepareForServer(this._db.notebooks.raw),
      delta: this._prepareForServer(await this._db.delta.all()),
      text: this._prepareForServer(await this._db.text.all()),
      tags: this._prepareForServer(this._db.tags.raw),
      colors: this._prepareForServer(this._db.colors.raw),
      trash: this._prepareForServer(this._db.trash.raw),
    };
  }

  _prepareForServer(array) {
    return tfun
      .filter((item) => item.dateEdited > this._lastSyncedTimestamp)
      .map((item) => {
        // in case of resolved delta, we do not want to send this key to the server
        if (item.resolved) delete item.resolved;

        return {
          id: item.id,
          data: JSON.stringify(item),
        };
      })(array);
  }
}
export default Prepare;