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# frozen_string_literal: true
module DesignManagement
# This service generates smaller image versions for `DesignManagement::Design`
# records within a given `DesignManagement::Version`.
class GenerateImageVersionsService < DesignService
# We limit processing to only designs with file sizes that don't
# exceed `MAX_DESIGN_SIZE`.
#
# Note, we may be able to remove checking this limit, if when we come to
# implement a file size limit for designs, there are no designs that
# exceed 40MB on GitLab.com
#
# See https://gitlab.com/gitlab-org/gitlab/-/merge_requests/22860#note_281780387
MAX_DESIGN_SIZE = 40.megabytes.freeze
def initialize(version)
super(version.project, version.author, issue: version.issue)
@version = version
end
def execute
# rubocop: disable CodeReuse/ActiveRecord
version.actions.includes(:design).each do |action|
generate_image(action)
end
# rubocop: enable CodeReuse/ActiveRecord
success(version: version)
end
private
attr_reader :version
def generate_image(action)
raw_file = get_raw_file(action)
unless raw_file
log_error("No design file found for Action: #{action.id}")
return
end
# Skip attempting to process images that would be rejected by CarrierWave.
return unless DesignManagement::DesignV432x230Uploader::MIME_TYPE_WHITELIST.include?(raw_file.content_type)
# Store and process the file
action.image_v432x230.store!(raw_file)
action.save!
rescue CarrierWave::IntegrityError => e
Gitlab::ErrorTracking.log_exception(e, project_id: project.id, design_id: action.design_id, version_id: action.version_id)
log_error(e.message)
rescue CarrierWave::UploadError => e
Gitlab::ErrorTracking.track_exception(e, project_id: project.id, design_id: action.design_id, version_id: action.version_id)
log_error(e.message)
end
# Returns the `CarrierWave::SanitizedFile` of the original design file
def get_raw_file(action)
raw_files_by_path[action.design.full_path]
end
# Returns the `Carrierwave:SanitizedFile` instances for all of the original
# design files, mapping to { design.filename => `Carrierwave::SanitizedFile` }.
#
# As design files are stored in Git LFS, the only way to retrieve their original
# files is to first fetch the LFS pointer file data from the Git design repository.
# The LFS pointer file data contains an "OID" that lets us retrieve `LfsObject`
# records, which have an Uploader (`LfsObjectUploader`) for the original design file.
def raw_files_by_path
@raw_files_by_path ||= begin
LfsObject.for_oids(blobs_by_oid.keys).each_with_object({}) do |lfs_object, h|
blob = blobs_by_oid[lfs_object.oid]
file = lfs_object.file.file
# The `CarrierWave::SanitizedFile` is loaded without knowing the `content_type`
# of the file, due to the file not having an extension.
#
# Set the content_type from the `Blob`.
file.content_type = blob.content_type
h[blob.path] = file
end
end
end
# Returns the `Blob`s that correspond to the design files in the repository.
#
# All design `Blob`s are LFS Pointer files, and are therefore small amounts
# of data to load.
#
# `Blob`s whose size are above a certain threshold: `MAX_DESIGN_SIZE`
# are filtered out.
def blobs_by_oid
@blobs ||= begin
items = version.designs.map { |design| [version.sha, design.full_path] }
blobs = repository.blobs_at(items)
blobs.reject! { |blob| blob.lfs_size > MAX_DESIGN_SIZE }
blobs.index_by(&:lfs_oid)
end
end
end
end
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