util.js

import { createInterface, cursorTo } from 'readline'
import { spawnSync } from 'child_process'
import { rmSync, existsSync } from 'fs'

export const bold = input => `\x1b[1m${input}\x1b[0m`

export const clear = () => process.stdout.write('\x1Bc\x1b[3J')

export const sanitize = str => str.replace(/([^a-z0-9]+)/gi, '-')

export const mktemp = () =>
  spawnSync('mktemp', ['-d']).stdout.toString('utf8').replaceAll('\n', '')

export const rmdir = dir =>
  existsSync(dir) && rmSync(dir, { recursive: true, force: true })

export const fmtTime = seconds => {
  const fmt = num => num.toString().padStart(2, '0')
  const time = new Date(seconds * 1000)

  return `${fmt(time.getMinutes())}:${fmt(time.getSeconds())}`
}

export const mkInterface = (opts, { stdin, stdout } = process) => {
  stdin.removeAllListeners('keypress')
  stdin.removeAllListeners('line')

  return createInterface({
    input: stdin,
    output: stdout,
    ...opts
  })
}

export const mkPrompt = (prompt = 'Search: ', prefilled) => {
  const rl = mkInterface({ prompt })
  prefilled && rl.write(prefilled)

  return new Promise(resolve => {
    rl.on('line', str => {
      if (str.replaceAll(' ', '').length > 0) {
        rl.close()
        resolve(str)
      }

      rl.prompt()
    })

    rl.prompt()
  })
}

export const getRows = n => process.stdout.rows - n

export const write = (str, x = 0, y = 0) => {
  cursorTo(process.stdout, x, y)
  process.stdout.write(str)
}