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/**
* Create an absolute URL from `options` and defaulting unspecified properties to `window.location`.
* @param {Object} options - a `Location`-like object
* @param {string} options.hostname
* @param {string} options.subdomain - prepend subdomain to the hostname
* @param {string} options.port
* @param {string} options.path
* @param {string} options.query
* @param {string} options.hash
* @returns {string}
*/
function make_absolute_url(options) {
var loc = window.location;
var protocol = get(options, "protocol", loc.protocol);
if (protocol[protocol.length - 1] != ":") {
protocol += ":";
}
var hostname = get(options, "hostname", loc.hostname);
var subdomain = get(options, "subdomain");
if (subdomain) {
hostname = subdomain + "." + hostname;
}
var port = get(options, "port", loc.port)
var path = get(options, "path", loc.pathname);
var query = get(options, "query", loc.search);
var hash = get(options, "hash", loc.hash)
var url = protocol + "//" + hostname;
if (port) {
url += ":" + port;
}
if (path[0] != "/") {
url += "/";
}
url += path;
if (query) {
if (query[0] != "?") {
url += "?";
}
url += query;
}
if (hash) {
if (hash[0] != "#") {
url += "#";
}
url += hash;
}
return url;
}
/** @private */
function get(obj, name, default_val) {
if (obj.hasOwnProperty(name)) {
return obj[name];
}
return default_val;
}
/**
* Generate a new UUID.
* @returns {string}
*/
function token() {
var uuid = [to_hex(rand_int(32), 8),
to_hex(rand_int(16), 4),
to_hex(0x4000 | rand_int(12), 4),
to_hex(0x8000 | rand_int(14), 4),
to_hex(rand_int(48), 12)].join("-")
return uuid;
}
/** @private */
function rand_int(bits) {
if (bits < 1 || bits > 53) {
throw new TypeError();
} else {
if (bits >= 1 && bits <= 30) {
return 0 | ((1 << bits) * Math.random());
} else {
var high = (0 | ((1 << (bits - 30)) * Math.random())) * (1 << 30);
var low = 0 | ((1 << 30) * Math.random());
return high + low;
}
}
}
/** @private */
function to_hex(x, length) {
var rv = x.toString(16);
while (rv.length < length) {
rv = "0" + rv;
}
return rv;
}