Fetches a photo from a Flickr group's pool.

gistfile1.sh

#!/bin/sh

API_KEY=
API_URL=https://secure.flickr.com/services/rest/
GROUP_ID=52242140489@N01

# Fetch the ID of the latest photo added to the group's pool.

PHOTO_ID=$(\
curl \
    --silent \
    --data-urlencode "method=flickr.groups.pools.getPhotos" \
    --data-urlencode "api_key=${API_KEY}" \
    --data-urlencode "group_id=${GROUP_ID}" \
    --data-urlencode "per_page=1" \
    "${API_URL}" \
\
| grep \
    --regexp='<photo\s+' \
    --extended-regexp \
\
| grep \
    --regexp='\s+id="[0-9]+"' \
    --extended-regexp \
    --only-matching \
\
| cut \
    -d '"' \
    -f 2 \
)

# Fetch the largest size available for this photo.

PHOTO_URL=$(\
curl \
    --silent \
    --data-urlencode "method=flickr.photos.getSizes" \
    --data-urlencode "api_key=${API_KEY}" \
    --data-urlencode "photo_id=${PHOTO_ID}" \
    --data-urlencode "per_page=1" \
    "${API_URL}" \
\
| grep \
    --regexp='<size\s+' \
    --extended-regexp \
\
| cut \
    -d '"' \
    -f 4,8 \
\
| sort \
    --numeric-sort \
    --reverse \
    --field-separator='"' \
\
| head \
    -n 1 \
\
| cut \
    -d '"' \
    -f 2 \
)

echo "${PHOTO_URL}"