zammad/lib/sequencer/unit/import/freshdesk/requester.rb

# Copyright (C) 2012-2023 Zammad Foundation, https://zammad-foundation.org/

module Sequencer::Unit::Import::Freshdesk::Requester
  def request(api_path:, params: nil)
    10.times do |iteration|
      response = perform_request(
        api_path: api_path,
        params:   params,
      )

      return response if response.is_a?(Net::HTTPOK) || response.is_a?(Net::HTTPNotFound)

      handle_error response, iteration
    rescue e
      handle_exception e, iteration
    end

    nil
  end

  def handle_error(response, iteration)
    sleep_for = 10
    case response
    when Net::HTTPTooManyRequests
      sleep_for = response.header['retry-after'].to_i + 10
      logger.info "Rate limit: #{response.header.to_hash} (429 Too Many Requests). Sleeping #{sleep_for} seconds and retry (##{iteration + 1}/10)."
    else
      logger.info "Unknown response: #{response.inspect}. Sleeping 10 seconds and retry (##{iteration + 1}/10)."
    end

    sleep sleep_for
  end

  def handle_exception(e, iteration)
    logger.error e
    logger.info "Sleeping 10 seconds after #{e.class.name} and retry (##{iteration + 1}/10)."

    sleep 10
  end

  def perform_request(api_path:, params: nil)
    uri = URI("#{Setting.get('import_freshdesk_endpoint')}/#{api_path}")
    uri.query = URI.encode_www_form(params) if params.present?
    headers = { 'Content-Type' => 'application/json' }

    Net::HTTP.start(uri.host, uri.port, use_ssl: true, read_timeout: 600) do |http|
      # for those special moments...
      # http.set_debug_output($stdout)
      request = Net::HTTP::Get.new(uri, headers)
      request.basic_auth(Setting.get('import_freshdesk_endpoint_key'), 'X')
      return http.request(request)
    end
  end
end