embed watermark to images (pass different option when needed)

watermark.js

const watermark = require('image-watermark')
const path = require('path')
const fs = require('fs')

class WatermarkOptions {
  constructor({ text, color, align, override, resize } = {}) {
    this.text = text || 'Shadowrocks'
    this.color = color || 'rgb(222, 222, 222)'
    this.align = align || 'ltr'
    this['override-image'] = override
    this.resize = resize
  }
}

// Get an array of dirs
process.argv.slice(2)
  .map(argv => path.resolve(__dirname, argv))
  // Filter the non-existences and non-dirs out
  .filter((dir) => {
    let stats
    try {
      stats = fs.statSync(dir)
    } catch (err) {
      console.log(err.message)
    }
    return stats && stats.isDirectory()
  })
  .forEach((dir) => {
    fs.readdir(dir, (err, files) => {
      files
        // Filter the non-images out
        .filter(file => /\.(png|jpg|jpeg|gif)$/.test(file))
        .forEach(file => {
          watermark.embedWatermark(
            path.resolve(dir, file),
            new WatermarkOptions({ override: true, resize: '50%' })
          )
        })
    })
  })