houd1ni / WebsocketPromisify

import './types'

import { native_ws } from './utils'

const default_config = <wsc.Config>{

  data_type: 'json',  // ToDo some other stuff maybe.

  // Debug features.

  log: (() => null),

  timer: false,

  // Set up.

  url: 'localhost',

  timeout: 1400,

  reconnect: 2,       // Reconnect timeout in seconds or null.

  lazy: false,

  socket: null,

  adapter: ((host, protocols) => new WebSocket(host, protocols)),

  encode: (key, data, { server }) => JSON.stringify({

    [server.id_key]: key,

    [server.data_key]: data

  }),

  decode: (rawMessage) => JSON.parse(rawMessage),

  protocols: [],

  pipes: [],

  server: {

    id_key: 'id',

    data_key: 'data'

  },

  ping: {

    interval: 55,

    content: {}

  }

}

export const processConfig = (config: wsc.UserConfig) => {

  if(native_ws===null && !('adapter' in config)) throw new Error(`

    This platform has no native WebSocket implementation.

    Please use 'ws' package as an adapter.

    See https://github.com/houd1ni/WebsocketPromisify/issues/23

  `)

  const full_config: wsc.Config = Object.assign(

    {},

    default_config,

    config

  )

  const url = full_config.url

  if(url[0] == '/') {

    try {

      const protocol = location.protocol.includes('s:') ? 'wss' : 'ws'

      full_config.url = `${protocol}://${location.hostname}:${location.port}${url}`

    } catch (e) {

      throw new Error('WSP: URL starting with / in non-browser environment!')

    }

  }

  return full_config

}