First commit

lib/utils.js

@@ -0,0 +1,73 @@
+'use strict'
+
+// Libraries
+const { customAlphabet } = require('nanoid')
+const StringCrypto = require('string-crypto')
+const path = require('path')
+
+// NanoId with custom alphabet
+const newId = (len) => {
+  const nanoid = customAlphabet(
+    'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789',
+    len || 21
+  )
+  return nanoid()
+}
+
+// Remove all _id
+const removeFieldByName = (o, fieldName) => {
+  delete o[fieldName]
+  for (let v of Object.values(o))
+    if (v instanceof Object) removeFieldByName(v, fieldName)
+}
+
+// Clean object from unnecesary fields
+const fieldsToRemove = ['_id']
+const cleanObject = (o) => {
+  const obj = JSON.parse(JSON.stringify(o))
+  fieldsToRemove.forEach((f) => {
+    removeFieldByName(obj, f)
+  })
+  return obj
+}
+
+// Securize sensible data
+const cryptoOptions = {
+  salt: process.env.CRYPTO_SALT,
+  iterations: parseInt(process.env.CRYPTO_ITERATIONS),
+  digest: process.env.CRYPTO_DIGEST // one of: 'blake2b512' | 'blake2s256' | 'md4' | 'md5' | 'md5-sha1' | 'mdc2' | 'ripemd160' | 'sha1' | 'sha224' | 'sha256' | 'sha3-224' | 'sha3-256' | 'sha3-384' | 'sha3-512' | 'sha384' | 'sha512' | 'sha512-224' | 'sha512-256' | 'sm3' | 'whirlpool';
+}
+const stringCypto = new StringCrypto(cryptoOptions)
+const encryptString = (value, password) => {
+  return stringCypto.encryptString(value, password)
+}
+
+const decryptString = (value, password) => {
+  return stringCypto.decryptString(value, password)
+}
+
+// Split array into pieces
+const chunk = (arr, size) =>
+  arr.reduce(
+    (acc, _, i) => (i % size ? acc : [...acc, arr.slice(i, i + size)]),
+    []
+  )
+
+// Sleep
+const sleep = (segundos) => {
+  return new Promise((resolve) => setTimeout(resolve, segundos * 1000))
+}
+
+// Get file name
+const getFileName = (f) => path.basename(f, '.js')
+
+module.exports = {
+  newId,
+  removeFieldByName,
+  cleanObject,
+  encryptString,
+  decryptString,
+  chunk,
+  sleep,
+  getFileName
+}