Amazon 360-images require a specific naming convention for their 360-images. Every item as a global identifier called an ASIN (Amazon Standard Identification Number) and the ASIN must be in 3 places.
- Zip filename must be
{ASIN}.zip - Zip file contents must have top-level have directory named
{ASIN}_360/ - Directory Images must be named accordingly:
{asin}_360/#{asin}_360_#{image_index}_web.{(jpg|png)} - Each image must be a SQUARE
- Each image cannot be larger than 2500px
My final code looks something like this:
asin = item.asins.first
zipfile = Tempfile.new([asin, '.zip'])
image_files = []
Zip::File.open(zipfile.path, Zip::File::CREATE) do |zipfile|
item.images_blobs.order("active_storage_blobs.filename ASC").each_with_index do |blob, index|
dir_filename = "#{asin}_360/#{asin}_360_#{index.to_s.rjust(4, '0')}_web.#{image_file_format}"
variant_options = {
gravity: "Center",
background: "white",
resize: "#{image_size}x#{image_size}",
extent: "#{image_size}x#{image_size}",
format: image_file_format
}
# Create a new tempfile for storing the downloaded blob (Not yet handled the situation if these images are too large)
image_file = URI.open(blob.variant(variant_options).processed.service_url)
# maintain a reference to the tempfile so it doesn't get garbage collected
image_files.push(image_file)
# add it to the zipfile
zipfile.add(dir_filename, image_file.path)
end
end
# Attach Zip file to the parent
item.three_sixty_exports.attach(io: File.open(zipfile.path, 'rb'), filename: "#{asin}.zip", content_type: 'application/zip')
Some items have multiple ASINs, so we actually iterate through this process for each ASIN.