Source: RequestMulti.js

  1. const Request = require('./Request')
  3. /**
  4.  * A request consisting of several requests - duplicate results will be filtered
  5.  * @extends Request
  6.  */
  7. class RequestMulti extends Request {
  8.   constructor (overpass, options, requests) {
  9.     super(overpass, options)
  10.     this.type = 'RequestMulti'
  12.     this.doneFeatures = {}
  13.     this.requests = requests
  15.     this.requests.forEach(req => {
  16.       req.on('finish', () => {
  17.         this.requests.splice(this.requests.indexOf(req), 1)
  18.       })
  20.       req.on('subrequest-compile', (subRequest) => this.emit('subrequest-compile', subRequest))
  21.       req.on('subrequest-finish', (subRequest) => this.emit('subrequest-finish', subRequest))
  23.       req.featureCallback = (err, ob) => {
  24.         if (!(ob.id in this.doneFeatures)) {
  25.           this.doneFeatures[ob.id] = true
  26.           this.featureCallback(err, ob)
  27.         }
  28.       }
  29.       req.finalCallback = () => {}
  31.       this.overpass.requests.push(req)
  32.     })
  33.   }
  35.   /**
  36.    * abort this request and sub requests
  37.    */
  38.   abort () {
  39.     this.requests.forEach(req => req.abort())
  40.     super.abort()
  41.   }
  43.   willInclude () {
  44.     return false
  45.   }
  47.   preprocess () {
  48.   }
  50.   mayFinish () {
  51.     return !this.requests.length
  52.   }
  53. }
  55. module.exports = RequestMulti