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
};