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