import sharp from 'sharp'

export default function ImageHelpers() {
  return {
    image: sharp(),

    // https://sharp.pixelplumbing.com/api-constructor#sharp
    async open(src: string) {
      return (this.image = src ? sharp(src) : this.image)
    },

    // https://sharp.pixelplumbing.com/api-output#tobuffer
    async toBuffer(sharpImg?: sharp.Sharp) {
      sharpImg = sharpImg || this.image
      return await sharpImg.png().toBuffer()
    },

    // https://sharp.pixelplumbing.com/api-resize
    cover(width: number, height?: number) {
      return (this.image = this.image.resize({
        width,
        height: height || width,
      }))
    },

    // https://sharp.pixelplumbing.com/api-composite
    composite(compositeAry: sharp.OverlayOptions[]) {
      return (this.image = this.image.composite(compositeAry))
    },
  }
}