class Form {

  constructor (data) {
    this._originalData = Object.assign({}, data)

    for (let key in data) {
      this[key] = data[key]
    }
  }

  reset () {
    for (let key in this._originalData) {
      this[key] = this._originalData[key]
    }
  }

  clear () {
    for (let key in this._originalData) {
      this[key] = null
    }
  }

  async submit (method, url) {
    const response = await fetch(url, {
      method,
      headers: {
        'Accept': 'application/json; charset=utf-8',
        'Content-Type': 'application/json; charset=utf-8',
      },
      body: JSON.stringify(this.data),
    })

    return await response.json()
  }

  async post (url) {
    return await this.submit('POST', url)
  }

  async put (url) {
    return await this.submit('PUT', url)
  }

  async delete (url) {
    return await this.submit('DELETE', url)
  }

}