How to query LinkedIn People Search by Company Name from Ruby with the LinkedIn Gem

linked_in_people_search_by_company_name.rb

  # Call me with linked_in_by_company('Disney')


  LINKEDIN = {
    api_key: ENV['LINKEDIN_API_KEY'],
    secret_key: ENV['LINKEDIN_SECRET_KEY'],
    consumers: {
      test_person: { 
        consumer_token: ENV['LINKEDIN_TESTPERSON_CONSUMER_TOKEN'],
        consumer_secret: ENV['LINKEDIN_TESTPERSON_CONSUMER_SECRET']
      }
    }
  }
  
  LINKED_IN_PROFILE_COLUMNS = %w(distance id first-name last-name headline location relation-to-viewer current-share summary specialties associations positions phone-numbers im-accounts twitter-accounts primary-twitter-account main-address picture-url site-standard-profile-request)
  
  def linkedin_client
    li = LinkedIn::Client.new(LINKEDIN[:api_key], LINKEDIN[:secret_key])
    li.authorize_from_access(LINKEDIN[:consumers][:test_person][:consumer_token], LINKEDIN[:consumers][:test_person][:consumer_secret])
    li
  end
  
  def linked_in_by_company(company_name)
    cache_key = "linkedin_company_search-#{company_name}"
    
    # Cache it for a couple days (if desired)
    result = Rails.cache.fetch(cache_key, :expires_in => 2.days) do
      Rails.logger.info "+++ Cache missed for #{cache_key} +++"

      per_page = 25
      start = 0
      collected_profiles = []

      # Loop until LinkedIn doesn't have anything to return
      new_profiles = [true]
      while !new_profiles.nil?
        new_profiles = linkedin_client.search({ 
          company_name: company_name, 
          count: per_page, 
          start: start, 
          sort: 'connections',
          fields: ["people:(#{LINKED_IN_PROFILE_COLUMNS.join(',')})"]
        }, 'people').people.all
        
        unless new_profiles.nil?
          collected_profiles = collected_profiles.concat(new_profiles)
        end
        start = start + per_page
      end
      
      collected_profiles
    end
    result
  end