1 files changed, 129 insertions, 0 deletions
diff --git a/media/jslib/CaveView/lib/BingProvider.js b/media/jslib/CaveView/lib/BingProvider.js
new file mode 100644
index 0000000..f74fbf6
--- /dev/null
+++ b/media/jslib/CaveView/lib/BingProvider.js
@@ -0,0 +1,129 @@
+
+/*
+* BingProvider.js (c) Angus Sawyer, 2017.
+*/
+
+
+function BingProvider ( imagerySet ) {
+
+	this.urlTemplate = null;
+	this.subdomains = [];
+	this.subdomainIndex = 0;
+	this.subdomainCount = 0;
+
+	this.minZoom = null;
+	this.maxZoom = null;
+
+	var self = this;
+
+	var metadata;
+
+	var uriScheme = window.location.protocol.replace( ':' , '' );
+
+	var key = 'Ap8PRYAyAVcyoSPio8EaFtDEpYJVNwEA70GqYj31EXa6jkT_SduFHMKeHnvyS4D_';
+	var metaUrlTemplate = uriScheme + '://dev.virtualearth.net/REST/v1/Imagery/Metadata/{imagerySet}?include=imageryProviders&uriScheme={uriScheme}&key={key}';
+
+	var metaUrl = metaUrlTemplate.replace( '{key}', key ).replace( '{imagerySet}', imagerySet ).replace( '{uriScheme}', uriScheme );
+
+	var req = new XMLHttpRequest();
+
+	req.open( 'GET', metaUrl );
+
+	req.responseType = 'text';
+
+	req.addEventListener( 'load', _getTemplate );
+
+	req.send();
+
+	return;
+
+	function _getTemplate () {
+
+		metadata = JSON.parse( req.response );
+
+		var rss = metadata.resourceSets;
+
+		for ( var i = 0; i < rss.length; i++ ) {
+
+			var rs = rss[ i ].resources;
+
+			for ( var j = 0; j < rs.length; j++ ) {
+
+				var r = rs[ j ];
+
+				self.subdomains = r.imageUrlSubdomains;
+				self.urlTemplate = r.imageUrl;
+
+				self.minZoom = r.zoomMin;
+				self.maxZoom = r.zoomMax;
+
+				self.subdomainCount = self.subdomains.length;
+
+				return;
+
+			}
+
+		}
+
+	}
+
+}
+
+
+BingProvider.quadkey = function ( x, y, z ) {
+
+	var quadKey = [];
+
+	for ( var i = z; i > 0; i-- ) {
+
+		var digit = '0';
+		var mask = 1 << ( i - 1 );
+
+		if ( ( x & mask ) != 0 ) {
+
+			digit++;
+
+		}
+
+		if ( ( y & mask ) != 0 ) {
+
+			digit++;
+			digit++;
+
+		}
+
+		quadKey.push( digit );
+
+	}
+
+	return quadKey.join( '' );
+
+}
+ 
+BingProvider.prototype.getAttribution = function () {
+
+	var img = document.createElement( 'img' );
+
+	img.src = 'https://www.microsoft.com/maps/images/branding/bing_maps_logo_white_125px_27px.png';
+	img.classList.add( 'overlay-branding' );
+
+	return img;
+
+};
+
+BingProvider.prototype.getUrl = function ( x, y, z ) {
+
+	var urlTemplate = this.urlTemplate;
+
+	if ( urlTemplate === null ) return null;
+
+	var qk = BingProvider.quadkey( x, y, z );
+
+	thissubdomainIndex = ++this.ubdomainIndex % this.subdomainCount;
+
+	var url = urlTemplate.replace( '{subdomain}', this.subdomains[ this.subdomainIndex ] ).replace( '{quadkey}', qk );
+
+	return url;
+
+};
+