sync-images.sh

#!/bin/bash

set -e

# Replace <your_access_key> with your Unsplash API access key
ACCESS_KEY="$HUGO_UNSPLASH_ACCESS_KEY"
COLLECTION_ID="$1"

# Initialize variables for pagination
page=1
per_page=30
total_pages=1
image_ids=""

# Get total photos in the collection and calc the total_pages
response=$(curl --silent --request GET "https://api.unsplash.com/collections/${COLLECTION_ID}" \
    --header "Authorization: Client-ID ${ACCESS_KEY}")
total_photos=$(echo "${response}" | jq -r '.total_photos')
total_pages=$((total_photos/30+1))

# Loop through each page of the collection's photos until all photos have been retrieved
while [ $page -le $total_pages ]; do
  # Make a request to the Unsplash API to retrieve the current page of the collection's photos
  response=$(curl --silent --request GET "https://api.unsplash.com/collections/${COLLECTION_ID}/photos?page=${page}&per_page=${per_page}" \
    --header "Authorization: Client-ID ${ACCESS_KEY}")

  # Use jq to extract the image IDs from the response and append them to the existing list
  page_image_ids=$(echo "${response}" | jq -r '.[].id')
  image_ids="${image_ids}
${page_image_ids}"

  page=$((page+1))
done

mkdir -p static/images
echo "---" > static/images/index.yml
new_images=0

# Download each image in the list to the static/images folder if it doesn't already exist
for id in $image_ids; do
  # Check if the image file exists locally
  if [ ! -f "static/images/${id}.jpg" ]; then
    # If the image file doesn't exist locally, download it from the Unsplash API
    url="https://unsplash.com/photos/${id}/download?fm=jpg&w=1600&h=900&fit=max"
    echo "$url"
    curl -sSL "$url" > static/images/"${id}".jpg
    new_images=$((new_images+1))
  fi
  echo "- ${id}.jpg" >> static/images/index.yml
done

[ "$new_images" != "0" ] && echo "New images added: $new_images"