mongo-uri-builder/index.js

A module to easily create mongodb connection strings using configuration objects

'use strict'

module.exports = function builder (config) {
  const defaults = {
    host: 'localhost'
  }

  config = Object.assign({}, defaults, config)

  // Schema
  let uri = 'mongodb://'

  if (config.username || config.user) {
    uri += (config.username || config.user)
  }

  if (config.password) {
    uri += ':' + config.password
  }

  if (config.username || config.user) {
    uri += '@'
  }

  // Host
  uri += config.host

  // Port
  if (config.port) {
    uri += ':' + config.port
  }

  // Replicas
  if (config.replicas) {
    config.replicas.forEach(replica => {
      uri += ',' + replica.host
      if (replica.port) {
        uri += ':' + replica.port
      }
    })
  }

  // Database & options
  if (config.database || config.options) {
    uri += '/'
  }

  if (config.database) {
    uri += config.database
  }

  if (config.options) {
    const pairs = []

    for (const prop in config.options) {
      if (Object.prototype.hasOwnProperty.call(config.options, prop)) {
        const k = encodeURIComponent(prop)
        const v = encodeURIComponent(config.options[prop])
        pairs.push(k + '=' + v)
      }
    }

    if (pairs) {
      uri += '?' + pairs.join('&')
    }
  }

  return uri
}