# all files / ol/source/ bingmapssource.js

95.52% Statements 64/67
64% Branches 16/25
100% Functions 6/6
95.52% Lines 64/67

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     goog.provide('ol.source.BingMaps');

    goog.require('goog.asserts');
    goog.require('ol.Attribution');
    goog.require('ol.TileRange');
    goog.require('ol.TileUrlFunction');
    goog.require('ol.extent');
    goog.require('ol.net');
    goog.require('ol.proj');
    goog.require('ol.source.State');
    goog.require('ol.source.TileImage');
    goog.require('ol.tilecoord');

    /**
     * @classdesc
     * Layer source for Bing Maps tile data.
     *
     * @constructor
     * @extends {ol.source.TileImage}
     * @param {olx.source.BingMapsOptions} options Bing Maps options.
     * @api stable
     */
    ol.source.BingMaps = function(options) {

      goog.base(this, {
        cacheSize: options.cacheSize,
        crossOrigin: 'anonymous',
        opaque: true,
        projection: ol.proj.get('EPSG:3857'),
        reprojectionErrorThreshold: options.reprojectionErrorThreshold,
        state: ol.source.State.LOADING,
        tileLoadFunction: options.tileLoadFunction,
        wrapX: options.wrapX !== undefined ? options.wrapX : true
      });

      /**
       * @private
       * @type {string}
       */
      this.culture_ = options.culture !== undefined ? options.culture : 'en-us';

      /**
       * @private
       * @type {number}
       */
      this.maxZoom_ = options.maxZoom !== undefined ? options.maxZoom : -1;

      var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/' +
          options.imagerySet +
          '?uriScheme=https&include=ImageryProviders&key=' + options.key;

      ol.net.jsonp(url, this.handleImageryMetadataResponse.bind(this), undefined,
          'jsonp');

    };
    goog.inherits(ol.source.BingMaps, ol.source.TileImage);

    /**
     * The attribution containing a link to the Microsoft® Bing™ Maps Platform APIs’
     * Terms Of Use.
     * @const
     * @type {ol.Attribution}
     * @api
     */
    ol.source.BingMaps.TOS_ATTRIBUTION = new ol.Attribution({
      html: '<a class="ol-attribution-bing-tos" ' +
          'href="http://www.microsoft.com/maps/product/terms.html">' +
          'Terms of Use</a>'
    });

    /**
     * @param {BingMapsImageryMetadataResponse} response Response.
     */
    ol.source.BingMaps.prototype.handleImageryMetadataResponse = function(response) {

      Iif (response.statusCode != 200 ||
          response.statusDescription != 'OK' ||
          response.authenticationResultCode != 'ValidCredentials' ||
          response.resourceSets.length != 1 ||
          response.resourceSets[0].resources.length != 1) {
        this.setState(ol.source.State.ERROR);
        return;
      }

      var brandLogoUri = response.brandLogoUri;
      Eif (brandLogoUri.indexOf('https') == -1) {
        brandLogoUri = brandLogoUri.replace('http', 'https');
      }
      //var copyright = response.copyright;  // FIXME do we need to display this?
      var resource = response.resourceSets[0].resources[0];
      goog.asserts.assert(resource.imageWidth == resource.imageHeight,
          'resource has imageWidth equal to imageHeight, i.e. is square');
      var maxZoom = this.maxZoom_ == -1 ? resource.zoomMax : this.maxZoom_;

      var sourceProjection = this.getProjection();
      var extent = ol.tilegrid.extentFromProjection(sourceProjection);
      var tileSize = resource.imageWidth == resource.imageHeight ?
          resource.imageWidth : [resource.imageWidth, resource.imageHeight];
      var tileGrid = ol.tilegrid.createXYZ({
        extent: extent,
        minZoom: resource.zoomMin,
        maxZoom: maxZoom,
        tileSize: tileSize
      });
      this.tileGrid = tileGrid;

      var culture = this.culture_;
      this.tileUrlFunction = ol.TileUrlFunction.createFromTileUrlFunctions(
          resource.imageUrlSubdomains.map(function(subdomain) {
            var quadKeyTileCoord = [0, 0, 0];
            var imageUrl = resource.imageUrl
                .replace('{subdomain}', subdomain)
                .replace('{culture}', culture);
            return (
                /**
                 * @param {ol.TileCoord} tileCoord Tile coordinate.
                 * @param {number} pixelRatio Pixel ratio.
                 * @param {ol.proj.Projection} projection Projection.
                 * @return {string|undefined} Tile URL.
                 */
                function(tileCoord, pixelRatio, projection) {
                  goog.asserts.assert(ol.proj.equivalent(
                      projection, sourceProjection),
                      'projections are equivalent');
                  Iif (!tileCoord) {
                    return undefined;
                  } else {
                    ol.tilecoord.createOrUpdate(tileCoord[0], tileCoord[1],
                        -tileCoord[2] - 1, quadKeyTileCoord);
                    return imageUrl.replace('{quadkey}', ol.tilecoord.quadKey(
                        quadKeyTileCoord));
                  }
                });
          }));

      Eif (resource.imageryProviders) {
        var transform = ol.proj.getTransformFromProjections(
            ol.proj.get('EPSG:4326'), this.getProjection());

        var attributions = resource.imageryProviders.map(function(imageryProvider) {
          var html = imageryProvider.attribution;
          /** @type {Object.<string, Array.<ol.TileRange>>} */
          var tileRanges = {};
          imageryProvider.coverageAreas.forEach(function(coverageArea) {
            var minZ = coverageArea.zoomMin;
            var maxZ = Math.min(coverageArea.zoomMax, maxZoom);
            var bbox = coverageArea.bbox;
            var epsg4326Extent = [bbox[1], bbox[0], bbox[3], bbox[2]];
            var extent = ol.extent.applyTransform(epsg4326Extent, transform);
            var tileRange, z, zKey;
            for (z = minZ; z <= maxZ; ++z) {
              zKey = z.toString();
              tileRange = tileGrid.getTileRangeForExtentAndZ(extent, z);
              if (zKey in tileRanges) {
                tileRanges[zKey].push(tileRange);
              } else {
                tileRanges[zKey] = [tileRange];
              }
            }
          });
          return new ol.Attribution({html: html, tileRanges: tileRanges});
        });
        attributions.push(ol.source.BingMaps.TOS_ATTRIBUTION);
        this.setAttributions(attributions);
      }

      this.setLogo(brandLogoUri);

      this.setState(ol.source.State.READY);

    };