#!/bin/sh
set -eu

API_URL=https://photos.gzr.im/api
API_KEY=zaJUJGHpFqY9OA6kAhuauTj9tC1YVfA8umtZc6ls8U

request() {
  ENDPOINT=${1:?}
  shift 1

  curl -sSfL "${API_URL}${ENDPOINT}" \
    -H "x-api-key: $API_KEY" \
    -H 'Content-Type: application/json' \
    "$@"
}

validateAccessToken() {
  request '/auth/validateToken' -X POST >/dev/null
}

# returns full json response
searchFavorites() {
  request '/search/metadata' \
    -H 'Accept: application/json' \
    -d '{"isFavorite": true}'
}

# requires '{"assetIds":["list","of","ids",...]}' on stdin
# downloads to PWD
downloadArchive() {
  request '/download/archive' \
    -H 'Accept: application/octet-stream' \
    -d @- \
    -o "archive.zip" \
    --no-silent
}

main() {
  validateAccessToken || exit 1

  # download favorites as archive
  searchFavorites |
    jq '[.assets.items[].id] | {assetIds:.}' -rc |
    downloadArchive
}

test -n "${DEBUG:-}" && set -x
main
exit 0