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Contents
# frozen_string_literal: true
module Alchemy
class PictureThumb < BaseRecord
# Stores the render result of a Alchemy::PictureVariant
# in the configured Dragonfly datastore
# (Default: Dragonfly::FileDataStore)
#
class Create
class << self
# @param [Alchemy::PictureVariant] variant the to be rendered image
# @param [String] signature A unique hashed version of the rendering options
# @param [String] uid The Unique Image Identifier the image is stored at
#
# @return [Alchemy::PictureThumb] The persisted thumbnail record
#
def call(variant, signature, uid)
return if !variant.picture.valid?
# create the thumb before storing
# to prevent db race conditions
@thumb = Alchemy::PictureThumb.create_or_find_by!(signature: signature) do |thumb|
thumb.picture = variant.picture
thumb.uid = uid
end
begin
# process the image
image = variant.image
# store the processed image
image.to_file(server_path(uid)).close
rescue RuntimeError => e
ErrorTracking.notification_handler.call(e)
# destroy the thumb if processing or storing fails
@thumb&.destroy
end
end
private
# Alchemys dragonfly datastore config seperates the storage path from the public server
# path for security reasons. The Dragonfly FileDataStorage does not support that,
# so we need to build the path on our own.
def server_path(uid)
dragonfly_app = ::Dragonfly.app(:alchemy_pictures)
"#{dragonfly_app.datastore.server_root}/#{uid}"
end
end
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems