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/* tslint:disable:array-type member-access variable-name */
export class UUID {
constructor() {
//
}
static UUID(): string {
if (typeof(window.crypto) !== 'undefined' &&
typeof(window.crypto.getRandomValues) !== 'undefined') {
// If we have a cryptographically secure PRNG, use that
let buf: Uint16Array = new Uint16Array(8);
window.crypto.getRandomValues(buf);
return (
this.pad4(buf[0]) + this.pad4(buf[1]) + '-' + this.pad4(buf[2]) +
'-' + this.pad4(buf[3]) + '-' + this.pad4(buf[4]) + '-' +
this.pad4(buf[5]) + this.pad4(buf[6]) + this.pad4(buf[7]));
} else {
// Otherwise, just use Math.random
return this.random4() + this.random4() + '-' + this.random4() + '-' +
this.random4() + '-' + this.random4() + '-' + this.random4() +
this.random4() + this.random4();
}
}
private static pad4(num: number): string {
let ret: string = num.toString(16);
while (ret.length < 4) {
ret = '0' + ret;
}
return ret;
}
private static random4(): string {
return Math.floor((1 + Math.random()) * 0x10000).toString(16).substring(1);
}
}
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