Небольшой рефакторинг

server/core/utils.js

@@ -1,6 +1,28 @@
 const { spawn } = require('child_process');
 const fs = require('fs-extra');
 const crypto = require('crypto');
+const baseX = require('base-x');
+
+const BASE36 = '0123456789abcdefghijklmnopqrstuvwxyz';
+const bs36 = baseX(BASE36);
+
+function toBase36(data) {
+    return bs36.encode(Buffer.from(data));
+}
+
+function fromBase36(data) {
+    return bs36.decode(data);
+}
+
+function getFileHash(filename, hashName, enc) {
+    return new Promise((resolve, reject) => {
+        const hash = crypto.createHash(hashName);
+        const rs = fs.createReadStream(filename);
+        rs.on('error', reject);
+        rs.on('data', chunk => hash.update(chunk));
+        rs.on('end', () => resolve(hash.digest(enc)));
+    });
+}
 
 function sleep(ms) {
     return new Promise(resolve => setTimeout(resolve, ms));
@@ -54,6 +76,9 @@ function spawnProcess(cmd, opts) {
 }
 
 module.exports = {
+    toBase36,
+    fromBase36,
+    getFileHash,
     sleep,
     randomHexString,
     touchFile,