interactor.rb

class Images::Create
  include Interactor

  def initialize(params:, user:)
    super
  end

  def call
    find_and_lock_edition do
      check_issues(context.params[:image])
      upload_image(context.params[:image])
      update_edition
      create_preview
    end
  end

private

  def find_and_lock_edition
    Edition.find_and_lock_current(document: context.params[:document]) do |edition|
      context.edition = edition
      yield
    end
  end

  def check_issues(image_params)
    issues = ::Requirements::ImageUploadChecker.new(image_params).issues
    context.fail!(issues: issues) if issues.any?
  end

  def upload_image(image_params)
    upload_service = ImageUploadService.new(image_params, context.edition.revision)
    context.image_revision = upload_service.call(context.user)
  end

  def update_edition
    updater = Versioning::RevisionUpdater.new(context.edition.revision,
                                              context.user)

    updater.update_image(context.image_revision, false)
    context.edition.assign_revision(updater.next_revision, context.user).save!
  end

  def create_preview
    PreviewService.new(context.edition).try_create_preview
  end
end