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101 lines
2.3 KiB
101 lines
2.3 KiB
var OverpassLayer = require('overpass-layer')
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function OpenStreetBrowserLoader () {
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this.types = {}
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this.categories = {}
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this.templates = {}
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}
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OpenStreetBrowserLoader.prototype.setMap = function (map) {
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this.map = map
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}
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OpenStreetBrowserLoader.prototype.getCategory = function (id, callback) {
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if (id in this.categories) {
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callback(null, this.categories[id])
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return
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}
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function reqListener (req) {
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if (req.status !== 200) {
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console.log(req)
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return callback(req.statusText, null)
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}
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var data = JSON.parse(req.responseText)
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this.getCategoryFromData(id, data, function (err, category) {
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if (category) {
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category.setMap(this.map)
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}
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callback(err, category)
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}.bind(this))
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}
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var req = new XMLHttpRequest()
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req.addEventListener("load", reqListener.bind(this, req))
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req.open("GET", config.categoriesDir + '/' + id + ".json?" + config.categoriesRev)
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req.send()
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}
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OpenStreetBrowserLoader.prototype.getTemplate = function (id, callback) {
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if (id in this.templates) {
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callback(null, this.templates[id])
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return
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}
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function reqListener (req) {
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if (req.status !== 200) {
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console.log(req)
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return callback(req.statusText, null)
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}
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this.templates[id] = OverpassLayer.twig.twig({ data: req.responseText, autoescape: true })
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callback(null, this.templates[id])
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}
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var req = new XMLHttpRequest()
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req.addEventListener("load", reqListener.bind(this, req))
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req.open("GET", config.categoriesDir + '/' + id + ".html?" + config.categoriesRev)
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req.send()
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}
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OpenStreetBrowserLoader.prototype.getCategoryFromData = function (id, data, callback) {
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if (!data.type) {
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callback('no type defined', null)
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return
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} else if (!(data.type in this.types)) {
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callback('unknown type', null)
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return
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} else {
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var layer = new this.types[data.type](id, data)
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layer.setMap(this.map)
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this.categories[id] = layer
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if ('load' in layer) {
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layer.load(function (err) {
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callback(err, layer)
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})
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} else {
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callback(null, layer)
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}
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}
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}
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OpenStreetBrowserLoader.prototype.forget = function (id) {
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this.categories[id].remove()
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delete this.categories[id]
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}
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OpenStreetBrowserLoader.prototype.registerType = function (type, classObject) {
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this.types[type] = classObject
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}
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module.exports = new OpenStreetBrowserLoader()
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