class UserModel {
  constructor(realm) {
    this.schema = 'Users';
    this.realm = realm;
  }

  add(data) {
    this.realm.write(() => {
      if (data.id === undefined) {
        let id = this.realm.objects(this.schema).max('id');
        data.id = id === undefined ? 1 : id + 1;
      }
      try {
        this.realm.create(this.schema, data, 'never');
      } catch (e) {
        console.log('db setting add', e);
      }
    });
  }

  upsert(data) {
    let tmp = this.get(data.key);
    if (tmp === false || tmp === undefined) {
      this.add(data);
    } else {
      if (data.id === undefined) {
        data.id = tmp.id;
      }
      this.realm.write(() => {
        this.realm.create(this.schema, data, 'modified');
      });
    }
  }

  update(data) {
    this.realm.write(() => {
      this.realm.create(this.schema, data, 'modified');
    });
  }

  get(id) {
    let tmp = this.realm.objects(this.schema);
    if (tmp.length === 0) {
      return false;
    } else {
      tmp = tmp.filtered('id = ' + id)[0];
    }
    return tmp;
  }

  getAll() {
    let tmp = this.realm.objects(this.schema);
    return tmp;
  }

  clear() {
    this.realm.write(() => {
      this.realm.delete(this.getAll());
    });
  }

}

export default UserModel;