hckrnews / fetcher

export default class URLString {

  constructor () {

    this.url = null

    this.path = {}

    this.searchParams = {}

  }

  setUrl (url) {

    if (!url || url.constructor !== String) {

      throw new Error('url isnt a valid string')

    }

    this.url = new URL(url).href

  }

  setSearchParams (searchParams) {

    if (!searchParams) {

      return

    }

    if (searchParams.constructor !== Object) {

      throw new Error('searchParams isnt a valid object')

    }

    this.searchParams = searchParams

  }

  setPath (path) {

    if (!path) {

      return

    }

    if (path.constructor !== Object) {

      throw new Error('path isnt a valid object')

    }

    this.path = path

  }

  urlReducer (accumulator, [key, value]) {

    if (!value) {

      return accumulator + '/' + key

    }

    return accumulator + '/' + key + '/' + value

  }

  toString () {

    const completeUrl = new URL(Object.entries(this.path).reduce(this.urlReducer, this.url))

    Object.entries(this.searchParams).forEach(([searchParam, searchValue]) => {

      if (searchValue) {

        completeUrl.searchParams.append(searchParam, searchValue)

      }

    })

    return completeUrl.href

  }

  /**

     * Generate an url from the url, path and search params

     *

     * @param {string} url

     * @param {object} path

     * @param {object} searchParams

     *

     * @return {string}

     */

  static create ({ url, path, searchParams }) {

    const newUrl = new URLString()

    newUrl.setUrl(url)

    newUrl.setPath(path)

    newUrl.setSearchParams(searchParams)

    return newUrl.toString()

  }

}