logs.js

const { exec } = require('child_process')
const _ = require('lodash')
const logs = require('../../config.js').logs
const Command = require('../command.js')
const Helpers = require('../../util/helpers.js')

module.exports = class Logs extends Command {

  constructor() {
    super('logs')
  }

  call(bot, opts, respond) {
    if (!this.adminCallable(opts)) return

    const options = { lines: '-n 100' }
    const argString = _.join(opts.args, ' ').trim()

    if (this.isNumber(argString)) {
      options.lines = `-n ${argString}`
    }

    if (this.isTimeRange(argString)) {
      options[since] = `--since "${argString}"`
    }

    this.getJournalLogs(options, (paste) => respond(`Last ${options.lines.split('-n ')[1]} lines: ${paste}`)) 
  }

  async uploadLogs(data, respond) {
    const res = await Helpers.uploadText(data)
    return respond(res.body.path)
  }

  getJournalLogs(options, respond) {
    let cmd = `journalctl -u botto.service -q --no-pager --no-hostname `
    
    Object.keys(options).forEach(k => cmd += options[k] )

    return exec(cmd, (e, out, err) => {
      if (e) {
        console.log(e.message)
        return respond('Ironically, something went wrong and you need to check logs')
      }
      if (err) {
        console.log('Error retrieving local logs: ' + err)
        return respond(err)
      }

      this.uploadLogs(out, (url) => respond(url))
    })
  }

  // e.g. !logs 15
  isNumber(argString) {
    return /^\d+$/.test(argString)
  }

  // e.g. !logs 2 days ago OR !logs 2d ago
  isTimeRange(argString) {
    return /^((\d+\w)|(\d+\s\w+))\sago$/.test(argString)
  }

}