openlayers/src/ol/uri.js

Build tools and sources for developing OpenLayers based mapping applications

goog.provide('ol.uri');


/**
 * Appends query parameters to a URI.
 *
 * @param {string} uri The original URI, which may already have query data.
 * @param {!Object} params An object where keys are URI-encoded parameter keys,
 *     and the values are arbitrary types or arrays.
 * @return {string} The new URI.
 */
ol.uri.appendParams = function(uri, params) {
  var keyParams = [];
  // Skip any null or undefined parameter values
  Object.keys(params).forEach(function(k) {
    if (params[k] !== null && params[k] !== undefined) {
      keyParams.push(k + '=' + encodeURIComponent(params[k]));
    }
  });
  var qs = keyParams.join('&');
  // remove any trailing ? or &
  uri = uri.replace(/[?&]$/, '');
  // append ? or & depending on whether uri has existing parameters
  uri = uri.indexOf('?') === -1 ? uri + '?' : uri + '&';
  return uri + qs;
};