OpenStreetBrowser/src/CategoryOverpass.js

var OpenStreetBrowserLoader = require('./OpenStreetBrowserLoader')
var OverpassLayer = require('overpass-layer')
var OverpassLayerList = require('overpass-layer').List
var CategoryBase = require('./CategoryBase')
var state = require('./state')
var defaultValues = {
  feature: {
    title: "{{ localizedTag(tags, 'name') |default(localizedTag(tags, 'operator')) | default(localizedTag(tags, 'ref')) | default(trans('unnamed')) }}",
    markerSign: '',
    'style:hover': {
      color: 'black',
      weight: 3,
      opacity: 1,
      radius: 12,
      fill: false
    }
  },
  queryOptions: {
    split: 64
  }
}

CategoryOverpass.prototype = Object.create(CategoryBase.prototype)
CategoryOverpass.prototype.constructor = CategoryOverpass
function CategoryOverpass (id, data) {
  var p

  CategoryBase.call(this, id, data)

  data.id = this.id

  // set undefined data properties from defaultValues
  for (var k1 in defaultValues) {
    if (!(k1 in data)) {
      data[k1] = defaultValues[k1]
    } else if (typeof defaultValues[k1] === 'object') {
      for (var k2 in defaultValues[k1]) {
        if (!(k2 in data[k1])) {
          data[k1][k2] = defaultValues[k1][k2]
        } else if (typeof defaultValues[k1][k2] === 'object') {
          for (var k3 in defaultValues[k1][k2]) {
            if (!(k3 in data[k1][k2])) {
              data[k1][k2][k3] = defaultValues[k1][k2][k3]
            }
          }
        }
      }
    }
  }

  // get minZoom
  if ('minZoom' in data) {
    // has minZoom
  } else if (typeof data.query === 'object') {
    data.minZoom = Object.keys(data.query)[0]
  } else {
    data.minZoom = 14
  }

  data.feature.appUrl = '#' + this.id + '/{{ id }}'

  this.layer = new OverpassLayer(data)

  this.layer.onLoadStart = function (ev) {
    this.dom.classList.add('loading')
    if (this.parentCategory) {
      this.parentCategory.notifyChildLoadStart(this)
    }
  }.bind(this)
  this.layer.onLoadEnd = function (ev) {
    this.dom.classList.remove('loading')
    if (this.parentCategory) {
      this.parentCategory.notifyChildLoadEnd(this)
    }

    if (ev.error && ev.error !== 'abort') {
      alert('Error loading data from Overpass API: ' + ev.error)
    }
  }.bind(this)
  this.layer.onAppear = function (ob) {
    // HOVER
    if (ob.listItem) {
      ob.listItem.onmouseover = function (id) {
        this.layer.show(id, { styles: [ 'hover' ] }, function () {})
      }.bind(this, ob.id)
      ob.listItem.onmouseout = function (id) {
        this.layer.hide(id)
      }.bind(this, ob.id)
    }
  }.bind(this)
  this.layer.onUpdate = function (ob) {
    if (!ob.popup || !ob.popup._contentNode) {
      return
    }

    this.updatePopupContent(ob, ob.popup)
  }.bind(this)

  p = document.createElement('div')
  p.className = 'loadingIndicator'
  p.innerHTML = '<i class="fa fa-spinner fa-pulse fa-fw"></i><span class="sr-only">Loading...</span>'
  this.dom.appendChild(p)

  p = document.createElement('div')
  p.className = 'loadingIndicator2'
  p.innerHTML = '<div class="bounce1"></div><div class="bounce2"></div><div class="bounce3"></div>'
  this.dom.appendChild(p)

  this.domStatus = document.createElement('div')
  this.domStatus.className = 'status'

  this.dom.appendChild(this.domStatus)

  register_hook('state-get', function (state) {
    if (this.isOpen) {
      if (state.categories) {
        state.categories += ','
      } else {
        state.categories = ''
      }

      state.categories += this.id
    }
  }.bind(this))

  register_hook('state-apply', function (state) {
    if (!('categories' in state)) {
      return
    }

    var list = state.categories.split(',')
    if (list.indexOf(this.id) === -1) {
      this.close()
    }

    // opening categories is handled by src/categories.js
  }.bind(this))
}

CategoryOverpass.prototype.load = function (callback) {
  OpenStreetBrowserLoader.getTemplate('popupBody', function (err, template) {
    if (err) {
      console.log("can't load popupBody.html")
    } else {
      this.popupBodyTemplate = template
    }

    callback(null)
  }.bind(this))
}

CategoryOverpass.prototype.setMap = function (map) {
  CategoryBase.prototype.setMap.call(this, map)

  this.map.on('zoomend', this.updateStatus.bind(this))
  this.updateStatus()
}

CategoryOverpass.prototype.updateStatus = function () {
  this.domStatus.innerHTML = ''

  if (typeof this.data.query === 'object') {
    var highestZoom = Object.keys(this.data.query).reverse()[0]
    if (this.map.getZoom() < highestZoom) {
      this.domStatus.innerHTML = 'zoom in for more map features'
    }
  }

  if ('minZoom' in this.data && this.map.getZoom() < this.data.minZoom) {
    this.domStatus.innerHTML = 'zoom in for map features to appear'
  }
}

CategoryOverpass.prototype.open = function () {
  if (this.isOpen) {
    return
  }

  CategoryBase.prototype.open.call(this)

  this.layer.addTo(this.map)

  if (!this.list) {
    this.list = new OverpassLayerList(this.domContent, this.layer)
  }

  this.isOpen = true

  state.update()
}

CategoryOverpass.prototype.recalc = function () {
  this.layer.recalc()
}

CategoryOverpass.prototype.close = function () {
  if (!this.isOpen) {
    return
  }

  CategoryBase.prototype.close.call(this)

  this.layer.remove()
  this.list.remove()

  state.update()
}

CategoryOverpass.prototype.get = function (id, callback) {
  this.layer.get(id, callback)
}

CategoryOverpass.prototype.show = function (id, options, callback) {
  this.layer.show(id, options, callback)
}

CategoryOverpass.prototype.notifyPopupOpen = function (object, popup) {
  this.updatePopupContent(object, popup)
}

CategoryOverpass.prototype.updatePopupContent = function (object, popup) {
  if (object.data.popupDescription || object.data.description) {
    var div = document.createElement('div')
    div.className = 'description'
    div.innerHTML = object.data.popupDescription || object.data.description
    popup._contentNode.insertBefore(div, popup._contentNode.firstChild.nextSibling)
  }

  if (this.popupBodyTemplate) {
    var popupBody = document.createElement('div')
    popupBody.className = 'popupBody'
    popup._contentNode.appendChild(popupBody)

    var data = this.layer.twigData(object.object)
    popupBody.innerHTML = this.popupBodyTemplate.render(data)
  }

  var footer = document.createElement('div')
  footer.className = 'footer'
  var footerContent = '<a class="showDetails" href="#' + this.id + '/' + object.id + '/details">show details</a>'
  footer.innerHTML = footerContent
  popup._contentNode.appendChild(footer)
}

CategoryOverpass.prototype.renderTemplate = function (object, templateId, callback) {
  OpenStreetBrowserLoader.getTemplate(templateId, function (err, template) {
    if (err) {
      err = "can't load " + templateId + ': ' + err
      return callback(err, null)
    }

    var data = this.layer.twigData(object.object)
    var result = template.render(data)

    callback(null, result)
  }.bind(this))
}

OpenStreetBrowserLoader.registerType('overpass', CategoryOverpass)
module.exports = CategoryOverpass