utils.js

const moment = require('moment');
const _ = require('lodash');
const fs = require('fs');
const redis = require('redis').createClient();
const settings = require('./settings.json');
const stripe = require("stripe")(settings.stripe.secretKey);

redis.config('SET', 'maxmemory', settings.general.redisMaxMemory);
redis.on('error', err => module.exports.logger(err) && module.exports.syslog(err));

let dbOnline = true;

module.exports = {
 pad(n, width, z) {
 z = z || '0';
 n = n + '';
 return n.length >= width ? n : new Array(width - n.length + 1).join(z) + n;
 },
 logger(msg) {
 if (typeof log === 'undefined') {
 log = {
 log: console.log
 };
 }
 // Clear log
 if (msg === true) {
 for (let i = 0; i < 10; i++) {
 log.log('');
 }
 log.logLines = [];
 } else {
 log.log(moment().format('LTS') + ' - ' + msg);
 }
 },
 syslog(msg, req = {session: null}) {
 try {
 throw new Error();
 } catch (e) {
 fs.appendFileSync('./RandomAPI.log', "[" + moment().format() + "] " + msg + "\n" + e.stack.toString() + "\n" + JSON.stringify(req.session) + "\n");
 }
 },
 random(mode, length) {
 let result = '';
 let chars;

 if (mode === 1) {
 chars = 'abcdef1234567890';
 } else if (mode === 2) {
 chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890';
 } else if (mode === 3) {
 chars = '0123456789';
 } else if (mode === 4) {
 chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
 } else if (mode === 5) {
 chars = 'abcdefghijklmnopqrstuvwxyz1234567890';
 } else if (mode === 6) {
 chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890';
 }

 for (let i = 0; i < length; i++) {
 result += chars[module.exports.range(0, chars.length - 1)];
 }

 return result;
 },
 range(min, max) {
 return Math.floor(Math.random() * (max - min + 1)) + min;
 },
 andify(cond) {
 const db = require('./models/db').connection;
 var formatted = "";
 if (Object.keys(cond).length > 1) {
 _.each(cond, function(value, key) {
 formatted += "`" + key + "` = " + db.escape(value) + " AND ";
 });
 return {query: formatted.slice(0, -5)};
 } else {
 return cond;
 }
 },
 missingProps(obj, expected) {
 return !expected.every(prop => prop in obj && obj[prop] !== undefined);
 },
 dbStatus(status) {
 if (status === undefined) {
 return dbOnline;
 } else {
 dbOnline = status;
 }
 },
 redis,
 stripe,
 settings
};