Allows you to download the higher resolution photos from a lightroom album (not original resolution).

fetch-lightroom-album.sc

import $ivy.`co.fs2::fs2-io:2.3.0`, fs2.io._
import $ivy.`co.fs2::fs2-core:2.3.0`, fs2._

import ammonite.ops._
import upickle.default.{ReadWriter => RW, macroRW}
import upickle._
import cats.effect._
import scala.concurrent.duration._

/**
LOG INTO LIGHTROOM AND GO TO THE ALBUM YOU WANT TO DOWNLOAD
- GRAB THE COOKIE FROM ONE OF THE REQUESTS
- DOWNLOAD THE RESPONSES TO XHR CALLS TO https://lightroom.adobe.com/v2/spaces/5be0bbc946d041de932c483f73e14a6d/albums/70c589d0859d492194da57b80efd4ce0/assets...
- THIS WILL BE A JSON FILE WITH A DEAD FIRST LINE: `while(true) {}`
- REMOVE THE FIRST LINE AND PUT THE FILE INTO A JSON FILE.
- IT LOOKS LIKE THIS
{
  "base": "https://photos.adobe.io/v2/spaces/5be0bbc946d041de932c483f73e14a6d/",
  "album": {
    "id": "70c589d0859d492194da57b80efd4ce0",
    "links": {
      "self": {
        "href": "albums/70c589d0859d492194da57b80efd4ce0"
      }
    }
  },
  "resources": [
    {
      "id": "bc1112fec85847ce9e21dc939b1eeae3",
      "type": "album_asset",
      "created": "0000-00-00T00:00:00",
      "updated": "0000-00-00T00:00:00",
      "revision_ids": [
        "36eea278167c4bcf8f1f91cf39e97a17"
      ],
      "links": {
        "self": {
          "href": "albums/70c589d0859d492194da57b80efd4ce0/assets/608c005d7d934c1ab18ea4b6cf8ea136"
        }
      },
      "asset": {
        "id": "608c005d7d934c1ab18ea4b6cf8ea136",
        "type": "asset",
        "subtype": "image",
        "created": "2020-02-06T01:34:56.431636Z",
        "updated": "2020-02-06T01:46:35.773254Z",
        "revision_ids": [
          "a5970d08065944ecb618673db22e2d5c",
          "a07a0a0edd2c8acfb314b2c2077256bf",
          "888b25a3574520a202bc77294e281ab4",
          "a68a19336658ab900929238ae094bc6f"
        ],
        "links": {
          "self": {
            "href": "assets/608c005d7d934c1ab18ea4b6cf8ea136"
          },
          "/rels/comments": {
            "href": "assets/608c005d7d934c1ab18ea4b6cf8ea136/comments",
            "count": 0
          },
          "/rels/favorites": {
            "href": "assets/608c005d7d934c1ab18ea4b6cf8ea136/favorites",
            "count": 0
          },
          "/rels/rendition_type/2048": {
            "href": "assets/608c005d7d934c1ab18ea4b6cf8ea136/revisions/a5970d08065944ecb618673db22e2d5c/renditions/74289892102452cb92155e94fc4c08bd"
          },
          "/rels/rendition_type/1280": {
            "href": "assets/608c005d7d934c1ab18ea4b6cf8ea136/revisions/a5970d08065944ecb618673db22e2d5c/renditions/820dbc22334846a383b6af7275bccef5"
          },
          "/rels/rendition_type/640": {
            "href": "assets/608c005d7d934c1ab18ea4b6cf8ea136/revisions/a5970d08065944ecb618673db22e2d5c/renditions/7cdcc08f64d620805ba197c8eade6e59"
          },
          "/rels/rendition_type/thumbnail2x": {
            "href": "assets/608c005d7d934c1ab18ea4b6cf8ea136/revisions/a5970d08065944ecb618673db22e2d5c/renditions/725e6233a5ce9e3eba9bbd8a701222d3"
          }
        }
        ...
      },
      "payload": {
        "userCreated": "2020-02-06T01:34:39.374Z",
        "userUpdated": "2020-02-06T01:34:39.374Z"
      }
    }
  ]
}

- RUN THIS PROGRAM WITH AMMONIOTE:
  `amm fetch-lightroom-album.sc photos1.json photos2.json [more files...]`
*/

final case class PhotoFile(base: String, resources: Seq[Resource])
object PhotoFile {
  implicit val rw: RW[PhotoFile] = macroRW
}

final case class Resource(`type`: String, asset: Asset)
object Resource {
  implicit val rw: RW[Resource] = macroRW
}


final case class Asset(id: String, links: Links)
object Asset {
  implicit val rw: RW[Asset] = macroRW
}

final case class Links(@upickle.implicits.key("/rels/rendition_type/2048") large: Href)
object Links {
  implicit val rw: RW[Links] = macroRW
}

final case class Href(href: String)
object Href {
  implicit val rw: RW[Href] = macroRW
}

val cookie = """COOKIE_HERE"""

def photosFromFile(fileName: Path): IO[PhotoFile] = {
  IO.delay(upickle.default.read[PhotoFile](fileName.toNIO))
}

def downloadResource(base: String, resource: Resource): IO[Unit] = {
  IO.delay {
    val url = s"${base}${resource.asset.links.large.href}"
      .replace("photos.adobe.io/v2/", "lightroom.adobe.com/v2c/")
    os.write(
      os.pwd / "photos" / s"${resource.asset.id}.jpg",
      requests.get.stream(
        url,
        headers = Map("Cookie" -> cookie)
      )
    )
  }
}

@main
def downloadPhotos(photoFiles: Path*) = {
  implicit val ioTimer: Timer[IO] = IO.timer(scala.concurrent.ExecutionContext.Implicits.global)
  fs2.Stream
    .emits(photoFiles)
    .evalMap(photosFromFile)
    .flatMap { photoFile =>
      fs2.Stream
        .emits(photoFile.resources)
        .map(resource => photoFile.base -> resource)
    }
    .evalMap { case (base, resource) => downloadResource(base, resource) }
    .metered(1.second)
    .compile
    .drain
    .unsafeRunSync()
}