/*
* Copyright 2015-2017 WorldWind Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @exports WmsUrlBuilder
*/
define([
'../error/ArgumentError',
'../util/Logger'
],
function (ArgumentError,
Logger) {
"use strict";
/**
* Constructs a WMS URL builder.
* @alias WmsUrlBuilder
* @constructor
* @classdesc Provides a factory to create URLs for WMS Get Map requests.
* @param {String} serviceAddress The address of the WMS server.
* @param {String} layerNames The comma-separated list of names of the layers to retrieve.
* @param {String} styleNames The comma-separated list of names of the styles to retrieve. May be null.
* @param {String} wmsVersion The version of the WMS server. May be null, in which case version 1.3.0 is
* assumed.
* @param {String} timeString The time parameter included in GetMap requests.
* May be null, in which case no time parameter is included in the request.
* @throws {ArgumentError} If the service address or layer names are null or empty.
*
*/
var WmsUrlBuilder = function (serviceAddress, layerNames, styleNames, wmsVersion, timeString) {
if (!serviceAddress || (serviceAddress.length === 0)) {
throw new ArgumentError(
Logger.logMessage(Logger.LEVEL_SEVERE, "WmsUrlBuilder", "constructor",
"The WMS service address is missing."));
}
if (!layerNames || (layerNames.length === 0)) {
throw new ArgumentError(
Logger.logMessage(Logger.LEVEL_SEVERE, "WmsUrlBuilder", "constructor",
"The WMS layer names are not specified."));
}
/**
* The address of the WMS server.
* @type {String}
*/
this.serviceAddress = serviceAddress;
/**
* The comma-separated list of layer names to retrieve.
* @type {String}
*/
this.layerNames = layerNames;
/**
* The comma-separated list of style names to retrieve.
* @type {String}
*/
this.styleNames = styleNames ? styleNames : "";
/**
* Indicates whether the layer should be requested with transparency.
* @type {Boolean}
* @default true
*/
this.transparent = true;
/**
* The WMS version to specify when requesting resources.
* @type {String}
* @default 1.3.0
*/
this.wmsVersion = (wmsVersion && wmsVersion.length > 0) ? wmsVersion : "1.3.0";
this.isWms130OrGreater = this.wmsVersion >= "1.3.0";
/**
* The coordinate reference system to use when requesting layers.
* @type {String}
* @default EPSG:4326
*/
this.crs = "EPSG:4326";
/**
* The time parameter included in GetMap requests. If null, no time parameter is included in the requests.
* @type {String}
*/
this.timeString = timeString;
};
/**
* Creates the URL string for a WMS Get Map request.
* @param {Tile} tile The tile for which to create the URL.
* @param {String} imageFormat The image format to request.
* @throws {ArgumentError} If the specified tile or image format are null or undefined.
*/
WmsUrlBuilder.prototype.urlForTile = function (tile, imageFormat) {
if (!tile) {
throw new ArgumentError(
Logger.logMessage(Logger.LEVEL_SEVERE, "WmsUrlBuilder", "urlForTile", "missingTile"));
}
if (!imageFormat) {
throw new ArgumentError(
Logger.logMessage(Logger.LEVEL_SEVERE, "WmsUrlBuilder", "urlForTile",
"The image format is null or undefined."));
}
var sector = tile.sector;
var sb = WmsUrlBuilder.fixGetMapString(this.serviceAddress);
if (sb.search(/service=wms/i) < 0) {
sb = sb + "service=WMS";
}
sb = sb + "&request=GetMap";
sb = sb + "&version=" + this.wmsVersion;
sb = sb + "&transparent=" + (this.transparent ? "TRUE" : "FALSE");
sb = sb + "&layers=" + this.layerNames;
sb = sb + "&styles=" + this.styleNames;
sb = sb + "&format=" + imageFormat;
sb = sb + "&width=" + tile.tileWidth;
sb = sb + "&height=" + tile.tileHeight;
if (this.timeString) {
sb = sb + "&time=" + this.timeString;
}
if (this.isWms130OrGreater) {
sb = sb + "&crs=" + this.crs;
sb = sb + "&bbox=";
if (this.crs === "CRS:84") {
sb = sb + sector.minLongitude + "," + sector.minLatitude + ",";
sb = sb + sector.maxLongitude+ "," + sector.maxLatitude;
} else {
sb = sb + sector.minLatitude + "," + sector.minLongitude + ",";
sb = sb + sector.maxLatitude+ "," + sector.maxLongitude;
}
} else {
sb = sb + "&srs=" + this.crs;
sb = sb + "&bbox=";
sb = sb + sector.minLongitude + "," + sector.minLatitude + ",";
sb = sb + sector.maxLongitude+ "," + sector.maxLatitude;
}
sb = sb.replace(" ", "%20");
return sb;
};
// Intentionally not documented.
WmsUrlBuilder.fixGetMapString = function (serviceAddress) {
if (!serviceAddress) {
throw new ArgumentError(
Logger.logMessage(Logger.LEVEL_SEVERE, "WmsUrlBuilder", "fixGetMapString",
"The specified service address is null or undefined."));
}
var index = serviceAddress.indexOf("?");
if (index < 0) { // if string contains no question mark
serviceAddress = serviceAddress + "?"; // add one
} else if (index !== serviceAddress.length - 1) { // else if question mark not at end of string
index = serviceAddress.search(/&$/);
if (index < 0) {
serviceAddress = serviceAddress + "&"; // add a parameter separator
}
}
return serviceAddress;
};
return WmsUrlBuilder;
});