Initial commit

lib/assets/javascripts/builder/data/wms-service.js

@@ -0,0 +1,86 @@
+var _ = require('underscore');
+
+var PROXY_URL = 'https://cartodb-wms.global.ssl.fastly.net/api';
+var PROXY_TILES = 'https://cartodb-wms.global.ssl.fastly.net/mapproxy';
+var METHOD_TO_URL = {
+  'read': '/check',
+  'create': '/add'
+};
+var SUPPORTED_MATRIX_SETS = [
+  'EPSG:4326',
+  'EPSG:4258'
+];
+
+function WMSService () {
+  this._wms_url = null;
+}
+
+WMSService.prototype.generateURL = function (opts) {
+  var req = PROXY_URL + METHOD_TO_URL[opts.method];
+  var url = this._wms_url;
+
+  var parser = document.createElement('a');
+
+  parser.href = url;
+
+  var params = parser.search.substr(1).split('&');
+
+  var hasCapabilities = _.find(params, function (p) { return p.toLowerCase().indexOf('request=getcapabilities') !== -1; });
+  var hasService = _.find(params, function (p) { return p.toLowerCase().indexOf('service=wms') !== -1; });
+
+  // If the user didn't provided the necessary params, let's add them
+
+  if (!hasCapabilities) {
+    params.push('request=GetCapabilities');
+  }
+
+  if (!hasService) {
+    params.push('service=WMS');
+  }
+
+  url += '?' + params.join('&');
+  req += '?url=' + encodeURIComponent(url);
+
+  var isWMTS = opts.type === 'wmts';
+  req += '&type=' + (isWMTS ? 'wmts' : 'wms');
+
+  if (opts.method === 'create') {
+    if (opts.layer && opts.srs) {
+      req += '&layer=' + opts.layer;
+      req += '&srs=EPSG:' + opts.srs[0].split(':')[1];
+    } else if (isWMTS && opts.layer && opts.matrix_sets.length > 0) {
+      req += '&layer=' + opts.layer;
+      req += '&matrix_set=' + this.supportedMatrixSets(opts.matrix_sets || [])[0];
+    }
+  }
+
+  return req;
+};
+
+WMSService.prototype.getFetchLayersURL = function () {
+  return this.generateURL({
+    method: 'read'
+  });
+};
+
+WMSService.prototype.saveLayerURL = function (opts) {
+  var createOpts = _.extend({
+    method: 'create'
+  }, opts);
+
+  return this.generateURL(createOpts);
+};
+
+WMSService.prototype.supportedMatrixSets = function (matrixSets) {
+  return _.intersection(matrixSets, SUPPORTED_MATRIX_SETS);
+};
+
+WMSService.prototype.getProxyTilesURL = function () {
+  return PROXY_TILES;
+};
+
+WMSService.prototype.setUrl = function (url) {
+  this._wms_url = url;
+};
+
+module.exports = WMSService;