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// Copyright 2018 The Immersive Web Community Group
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
/*
Provides a simple way to get values from the query string if they're present
and use a default value if not. Not strictly a "WebGL" utility, but I use it
frequently enough for debugging that I wanted to include it here.
Example:
For the URL http://example.com/index.html?particleCount=1000
QueryArgs.getInt("particleCount", 100); // URL overrides, returns 1000
QueryArgs.getInt("particleSize", 10); // Not in URL, returns default of 10
*/
let urlArgs = null;
window.onhashchange = function() {
// Force re-parsing on next access
urlArgs = null;
};
function ensureArgsCached() {
if (!urlArgs) {
urlArgs = {};
let query = window.location.search.substring(1) || window.location.hash.substring(1);
let vars = query.split('&');
for (let i = 0; i < vars.length; i++) {
let pair = vars[i].split('=');
urlArgs[pair[0].toLowerCase()] = decodeURIComponent(pair[1]);
}
}
}
export class QueryArgs {
static getString(name, defaultValue) {
ensureArgsCached();
let lcaseName = name.toLowerCase();
if (lcaseName in urlArgs) {
return urlArgs[lcaseName];
}
return defaultValue;
}
static getInt(name, defaultValue) {
ensureArgsCached();
let lcaseName = name.toLowerCase();
if (lcaseName in urlArgs) {
return parseInt(urlArgs[lcaseName], 10);
}
return defaultValue;
}
static getFloat(name, defaultValue) {
ensureArgsCached();
let lcaseName = name.toLowerCase();
if (lcaseName in urlArgs) {
return parseFloat(urlArgs[lcaseName]);
}
return defaultValue;
}
static getBool(name, defaultValue) {
ensureArgsCached();
let lcaseName = name.toLowerCase();
if (lcaseName in urlArgs) {
return parseInt(urlArgs[lcaseName], 10) != 0;
}
return defaultValue;
}
}
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