2017-10-22 09:10:33 +08:00
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"use strict";
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2017-10-29 07:55:55 +08:00
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const crypto = require('crypto');
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2017-12-10 09:44:06 +08:00
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const randtoken = require('rand-token').generator({source: 'crypto'});
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2017-10-29 07:55:55 +08:00
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2017-10-15 11:31:44 +08:00
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function newNoteId() {
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2017-12-08 11:57:39 +08:00
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return randomString(12);
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2017-10-15 11:31:44 +08:00
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}
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2017-11-19 21:47:22 +08:00
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function newNoteTreeId() {
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2017-11-20 01:06:48 +08:00
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return randomString(12);
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2017-11-19 21:47:22 +08:00
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}
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function newNoteHistoryId() {
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return randomString(12);
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}
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2017-10-29 01:19:12 +08:00
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function randomString(length) {
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2017-12-10 09:44:06 +08:00
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return randtoken.generate(length);
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2017-10-15 11:31:44 +08:00
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}
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2017-10-29 07:55:55 +08:00
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function randomSecureToken(bytes = 32) {
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2017-10-29 23:22:41 +08:00
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return crypto.randomBytes(bytes).toString('base64');
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2017-10-29 07:55:55 +08:00
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}
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2017-10-15 11:31:44 +08:00
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function nowTimestamp() {
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2017-10-16 05:07:34 +08:00
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return Math.floor(Date.now() / 1000);
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2017-10-15 11:31:44 +08:00
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}
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2017-12-11 01:56:59 +08:00
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function nowDate() {
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return dateStr(new Date());
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}
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function dateStr(date) {
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return date.toISOString().replace("T", " ").replace("Z", "");
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}
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/**
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* @param str - needs to be in the "YYYY-MM-DD HH:MM:SS.sss" format as outputted by dateStr().
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* also is assumed to be GMT time, *not* local time
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*/
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function parseDate(str) {
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try {
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const isoDate = str.replace(" ", "T") + "Z";
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return new Date(Date.parse(isoDate));
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}
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catch (e) {
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throw new Error("Can't parse date from " + str + ": " + e.stack);
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}
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}
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2017-10-15 11:31:44 +08:00
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function toBase64(plainText) {
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return Buffer.from(plainText).toString('base64');
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}
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function fromBase64(encodedText) {
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return Buffer.from(encodedText, 'base64');
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}
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2017-10-30 02:55:48 +08:00
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function hmac(secret, value) {
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const hmac = crypto.createHmac('sha256', Buffer.from(secret.toString(), 'ASCII'));
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hmac.update(value.toString());
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return hmac.digest('base64');
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}
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2017-11-06 06:58:55 +08:00
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function isElectron() {
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return !!process.versions['electron'];
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}
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2017-11-06 10:56:42 +08:00
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function formatDateTimeFromTS(timestamp) {
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const date = new Date(timestamp * 1000);
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return date.toISOString();
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}
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function formatTwoTimestamps(origTS, newTS) {
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return "orig: " + formatDateTimeFromTS(origTS) + ", new: " + formatDateTimeFromTS(newTS);
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}
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2017-11-22 11:11:27 +08:00
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function hash(text) {
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return crypto.createHash('sha1').update(text).digest('base64');
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}
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2017-11-27 12:10:23 +08:00
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function isEmptyOrWhitespace(str) {
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return str === null || str.match(/^ *$/) !== null;
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}
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2017-11-22 11:11:27 +08:00
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2017-10-15 11:31:44 +08:00
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module.exports = {
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2017-10-29 07:55:55 +08:00
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randomSecureToken,
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2017-10-29 00:12:20 +08:00
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randomString,
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2017-10-15 11:31:44 +08:00
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nowTimestamp,
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2017-12-11 01:56:59 +08:00
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nowDate,
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dateStr,
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parseDate,
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2017-10-15 11:31:44 +08:00
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newNoteId,
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2017-11-19 21:47:22 +08:00
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newNoteTreeId,
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newNoteHistoryId,
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2017-10-15 11:31:44 +08:00
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toBase64,
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2017-10-30 02:55:48 +08:00
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fromBase64,
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2017-11-05 23:41:54 +08:00
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hmac,
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2017-11-06 10:56:42 +08:00
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isElectron,
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2017-11-22 11:11:27 +08:00
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formatTwoTimestamps,
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2017-11-27 12:10:23 +08:00
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hash,
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isEmptyOrWhitespace
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2017-10-15 11:31:44 +08:00
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};
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