branch.io example

class BranchLinkAdapter
  BRANCH_IO_API_URL = 'https://api.branch.io/v1/url'.freeze
  def initialize(token, desktop_url)
    @token = token
    @key = Rails.application.secrets.branchio_key
    @desktop_url = desktop_url
  end

  def fetch
    JSON.parse(fetch_url.body)['url'] if fetch_url.code == 200
  end

  private

  def headers
    { 'content_type' => 'application/json', 'accept' => 'application/json' }
  end

  def payload
    # set type: 1, for one time links
    {
      branch_key: @key,
      data: {
        token: @token,
        '$desktop_url' => @desktop_url
      }
    }.to_json
  end

  def fetch_url
    @fetch_url ||= RestClient.post(BRANCH_IO_API_URL, payload, headers)
  end
end