git.squeep.com Git - squeep-indieauth-helper/blob - lib/common.js

   1 'use strict';
   2
   3 const path = require('path');
   4
   5 /**
   6  * Return a function which combines a part of the filename with a scope, for use in logging.
   7  * @param {string} filename
   8  */
   9 const fileScope = (filename) => {
  10   let fScope = path.basename(filename, '.js');
  11   if (fScope === 'index') {
  12     fScope = path.basename(path.dirname(filename));
  13   }
  14   return (scope) => `${fScope}:${scope}`;
  15 }
  16
  17
  18 /**
  19  * Convert Base64 to Base64URL.
  20  * @param {String} input
  21  * @returns {String}
  22  */
  23 const base64ToBase64URL = (input) => {
  24   return input
  25     .replace(/=/g, '')
  26     .replace(/\+/g, '-')
  27     .replace(/\//g, '_');
  28 };
  29
  30
  31 /**
  32  * Pick out useful axios response fields.
  33  * @param {*} res
  34  * @returns
  35  */
  36 const axiosResponseLogData = (res) => {
  37   const data = pick(res, [
  38     'status',
  39     'statusText',
  40     'headers',
  41     'elapsedTimeMs',
  42     'data',
  43   ]);
  44   if (data.data) {
  45     data.data = logTruncate(data.data, 100);
  46   }
  47   return data;
  48 };
  49
  50
  51 /**
  52  * Limit length of string to keep logs sane
  53  * @param {String} str
  54  * @param {Number} len
  55  * @returns {String}
  56  */
  57 const logTruncate = (str, len) => {
  58   if (typeof str !== 'string' || str.toString().length <= len) {
  59     return str;
  60   }
  61   return str.toString().slice(0, len) + `... (${str.toString().length} bytes)`;
  62 };
  63
  64
  65 /**
  66  * Return a new object with selected props.
  67  * @param {Object} obj
  68  * @param {String[]} props
  69  */
  70 const pick = (obj, props) => {
  71   return props.reduce((acc, prop) => {
  72     if (prop in obj) {
  73       acc[prop] = obj[prop]; // eslint-disable-line security/detect-object-injection
  74     }
  75     return acc;
  76   }, {});
  77 };
  78
  79
  80 module.exports = {
  81   fileScope,
  82   base64ToBase64URL,
  83   axiosResponseLogData,
  84   logTruncate,
  85   pick,
  86 };