nativescript-plugin-firebase-ssi/app/database/util/NextPushId.js

Fire. Base. Firebase!

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.nextPushId = (function () {
    var PUSH_CHARS = '-0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz';
    var lastPushTime = 0;
    var lastRandChars = [];
    return function (now) {
        var duplicateTime = now === lastPushTime;
        lastPushTime = now;
        var i;
        var timeStampChars = new Array(8);
        for (i = 7; i >= 0; i--) {
            timeStampChars[i] = PUSH_CHARS.charAt(now % 64);
            now = Math.floor(now / 64);
        }
        var id = timeStampChars.join('');
        if (!duplicateTime) {
            for (i = 0; i < 12; i++) {
                lastRandChars[i] = Math.floor(Math.random() * 64);
            }
        }
        else {
            for (i = 11; i >= 0 && lastRandChars[i] === 63; i--) {
                lastRandChars[i] = 0;
            }
            lastRandChars[i]++;
        }
        for (i = 0; i < 12; i++) {
            id += PUSH_CHARS.charAt(lastRandChars[i]);
        }
        return id;
    };
})();