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115 lines
3.6 KiB
Ruby
115 lines
3.6 KiB
Ruby
require 'zip'
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require 'fileutils'
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# To use ZipExport you have to define the generate_( type )_zip method!
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# Example:
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# def generate_(type)_zip(tmp_dir, data, options = {})
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# attributes = options.fetch(:attributes) { :attributes_missing }
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# file = FileUtils.touch("#{tmp_dir}/export.csv").first
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# records = data
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# CSV.open(file, 'wb') do |csv|
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# csv << attributes
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# records.find_each do |entity|
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# csv << entity.values_at(*attributes.map(&:to_sym))
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# end
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# end
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# end
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class ZipExport < ApplicationRecord
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belongs_to :user, optional: true
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has_attached_file :zip_file
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validates_attachment :zip_file,
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content_type: { content_type: 'application/zip' }
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# When using S3 file upload, we can limit file accessibility with url signing
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def presigned_url(style = :original,
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download: false,
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timeout: Constants::URL_SHORT_EXPIRE_TIME)
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if stored_on_s3?
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if download
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download_arg = 'attachment; filename=' + URI.escape(zip_file_file_name)
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else
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download_arg = nil
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end
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signer = Aws::S3::Presigner.new(client: S3_BUCKET.client)
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signer.presigned_url(:get_object,
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bucket: S3_BUCKET.name,
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key: zip_file.path(style)[1..-1],
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expires_in: timeout,
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response_content_disposition: download_arg)
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end
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end
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def stored_on_s3?
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zip_file.options[:storage].to_sym == :s3
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end
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def generate_exportable_zip(user, data, type, options = {})
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FileUtils.mkdir_p(File.join(Rails.root, 'tmp/zip-ready'))
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dir_to_zip = FileUtils.mkdir_p(
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File.join(Rails.root, "tmp/temp-zip-#{Time.now.to_i}")
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).first
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output_file = File.new(
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File.join(Rails.root, "tmp/zip-ready/export-#{Time.now.to_i}.zip"),
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'w+'
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)
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fill_content(dir_to_zip, data, type, options)
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zip!(dir_to_zip, output_file.path)
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self.zip_file = File.open(output_file)
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generate_notification(user) if save
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end
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handle_asynchronously :generate_exportable_zip
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private
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def method_missing(m, *args, &block)
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puts 'Method is missing! To use this zip_export you have to ' \
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'define a method: generate_( type )_zip.'
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object.public_send(m, *args, &block)
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end
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def respond_to_missing?(method_name, include_private = false)
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method_name.to_s.start_with?(' generate_') || super
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end
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def fill_content(dir, data, type, options = {})
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eval("generate_#{type}_zip(dir, data, options)")
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end
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def generate_notification(user)
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notification = Notification.create(
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type_of: :deliver,
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title: I18n.t('zip_export.notification_title'),
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message: "<a data-id='#{id}' " \
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"href='#{Rails.application
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.routes
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.url_helpers
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.zip_exports_download_path(self)}'>" \
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"#{zip_file_file_name}</a>"
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)
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UserNotification.create(notification: notification, user: user)
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end
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def zip!(input_dir, output_file)
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files = Dir.entries(input_dir)
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files.delete_if { |el| el == '..' || el == '.' }
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Zip::File.open(output_file, Zip::File::CREATE) do |zipfile|
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files.each do |filename|
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zipfile.add(filename, input_dir + '/' + filename)
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end
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end
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end
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def generate_samples_zip(tmp_dir, data, _options = {})
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file = FileUtils.touch("#{tmp_dir}/export.csv").first
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File.open(file, 'wb') { |f| f.write(data) }
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end
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def generate_repositories_zip(tmp_dir, data, _options = {})
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file = FileUtils.touch("#{tmp_dir}/export.csv").first
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File.open(file, 'wb') { |f| f.write(data) }
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end
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end
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