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docuseal/app/controllers/preview_document_page_contr...

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# frozen_string_literal: true
class PreviewDocumentPageController < ActionController::API
include ActiveStorage::SetCurrent
FORMAT = Templates::ProcessDocument::FORMAT
def show
if Docuseal.multitenant?
Rollbar.warning('load page')
return head :not_found
end
attachment = ActiveStorage::Attachment.find_by(uuid: params[:attachment_uuid])
return head :not_found unless attachment
preview_image = attachment.preview_images.joins(:blob).find_by(blob: { filename: "#{params[:id]}#{FORMAT}" })
return redirect_to preview_image.url, allow_other_host: true if preview_image
file_path =
if attachment.service.name == :disk
ActiveStorage::Blob.service.path_for(attachment.key)
else
find_or_create_document_tempfile_path(attachment)
end
io = Templates::ProcessDocument.generate_pdf_preview_from_file(attachment, file_path, params[:id].to_i)
render plain: io.tap(&:rewind).read
end
def find_or_create_document_tempfile_path(attachment)
file_path = "#{Dir.tmpdir}/#{attachment.uuid}"
File.open(file_path, File::RDWR | File::CREAT, 0o644) do |f|
f.flock(File::LOCK_EX)
# rubocop:disable Style/ZeroLengthPredicate
if f.size.zero?
f.binmode
f.write(attachment.download)
end
# rubocop:enable Style/ZeroLengthPredicate
end
file_path
end
end