scinote-web/app/services/label_templates_preview_service.rb

# frozen_string_literal: true

class LabelTemplatesPreviewService
  extend Service

  attr_reader :error, :preview

  def initialize(params, user)
    @user = user
    @params = params
  end

  def generate_zpl_preview!
    client = Aws::Lambda::Client.new(region: ENV['AWS_REGION'])
    resp = client.invoke(
      function_name: 'BinaryKitsZplViewer',
      invocation_type: 'RequestResponse',
      log_type: 'Tail',
      payload:
        "{ \"content\": #{sanitize_zpl_code(@params[:zpl]).to_json},"\
        "\"width\": #{@params[:width]},"\
        "\"height\": #{@params[:height]},"\
        "\"density\": #{@params[:density]} "\
        "}"
    )

    if resp.function_error.nil?
      @preview = resp.payload.string.delete('"')
    else
      begin
        error_response = JSON.parse(resp.payload.string)
        @error = error_response['errorMessage']
      rescue JSON::ParserError
        @error = resp.function_error
      end
    end
  end

  private

  def sanitize_zpl_code(zpl_code)
    zpl_code.gsub('_', '_5F')
  end
end