moved all sources to src directory

src/services/utils.js

@@ -0,0 +1,136 @@
+"use strict";
+
+const crypto = require('crypto');
+const randtoken = require('rand-token').generator({source: 'crypto'});
+
+function newNoteId() {
+    return randomString(12);
+}
+
+function newNoteTreeId() {
+    return randomString(12);
+}
+
+function newnoteRevisionId() {
+    return randomString(12);
+}
+
+function newImageId() {
+    return randomString(12);
+}
+
+function newNoteImageId() {
+    return randomString(12);
+}
+
+function newAttributeId() {
+    return randomString(12);
+}
+
+function randomString(length) {
+    return randtoken.generate(length);
+}
+
+function randomSecureToken(bytes = 32) {
+    return crypto.randomBytes(bytes).toString('base64');
+}
+
+function nowDate() {
+    return dateStr(new Date());
+}
+
+function dateStr(date) {
+    return date.toISOString();
+}
+
+/**
+ * @param str - needs to be in the ISO 8601 format "YYYY-MM-DDTHH:MM:SS.sssZ" format as outputted by dateStr().
+ *              also is assumed to be GMT time (as indicated by the "Z" at the end), *not* local time
+ */
+function parseDate(str) {
+    try {
+        return new Date(Date.parse(str));
+    }
+    catch (e) {
+        throw new Error("Can't parse date from " + str + ": " + e.stack);
+    }
+}
+
+function toBase64(plainText) {
+    return Buffer.from(plainText).toString('base64');
+}
+
+function fromBase64(encodedText) {
+    return Buffer.from(encodedText, 'base64');
+}
+
+function hmac(secret, value) {
+    const hmac = crypto.createHmac('sha256', Buffer.from(secret.toString(), 'ASCII'));
+    hmac.update(value.toString());
+    return hmac.digest('base64');
+}
+
+function isElectron() {
+    return !!process.versions['electron'];
+}
+
+function hash(text) {
+    return crypto.createHash('sha1').update(text).digest('base64');
+}
+
+function isEmptyOrWhitespace(str) {
+    return str === null || str.match(/^ *$/) !== null;
+}
+
+function getDateTimeForFile() {
+    return new Date().toISOString().substr(0, 19).replace(/:/g, '');
+}
+
+function sanitizeSql(str) {
+    // should be improved or usage eliminated
+    return str.replace(/'/g, "\\'");
+}
+
+function assertArguments() {
+    for (const i in arguments) {
+        if (!arguments[i]) {
+            throw new Error(`Argument idx#${i} should not be falsy: ${arguments[i]}`);
+        }
+    }
+}
+
+async function stopWatch(what, func) {
+    const start = new Date();
+
+    const ret = await func();
+
+    const tookMs = new Date().getTime() - start.getTime();
+
+    console.log(`${what} took ${tookMs}ms`);
+
+    return ret;
+}
+
+module.exports = {
+    randomSecureToken,
+    randomString,
+    nowDate,
+    dateStr,
+    parseDate,
+    newNoteId,
+    newNoteTreeId,
+    newnoteRevisionId,
+    newImageId,
+    newNoteImageId,
+    newAttributeId,
+    toBase64,
+    fromBase64,
+    hmac,
+    isElectron,
+    hash,
+    isEmptyOrWhitespace,
+    getDateTimeForFile,
+    sanitizeSql,
+    assertArguments,
+    stopWatch
+};