How to allow users to be able to upload to my google drive in rails app and then provide them a preview link for google doc in the app?

I need my rails app users to be able to upload to my google drive folder. He should click browse file button and after submission, the file should be uploaded to my drive and I should be able to get document preview link and download link for the user in the rails app itself. Please tell me how to proceed with this. I am completely new to rails.