Assignment

Build Facebook! You'll build a large portion of the core Facebook user functionality in this project. We won't be worrying about the Javascript-heavy front end stuff but you won't need it to get a nice user experience.

You should write at least a basic set of integration tests which let you know if each page is loading properly and unit tests to make sure your associations have been properly set up (e.g. testing that User.first.posts works properly). Run them continuously in the background with Guard (See the Ruby on Rails Tutorial Chapter 3.7.3).

This project will give you a chance to take a relatively high level set of requirements and turn it into a functioning website. You'll need to read through the documentation on GitHub for some of the gems you'll be using.

Keep the following requirements in mind. We'll cover specific steps to get started below this list:

1. Use PostgreSQL for your database from the beginning (not SQLite3), that way your deployment to Heroku will go much more smoothly. See the [Heroku Docs](https://devcenter.heroku.com/articles/getting-started-with-rails4) for setup info. 2. Users must sign in to see anything except the sign in page. 3. User sign-in should use the [Devise](https://github.com/plataformatec/devise) gem. Devise gives you all sorts of helpful methods so you no longer have to write your own user passwords, sessions, and `#current_user` methods. See the [Railscast](http://railscasts.com/episodes/209-introducing-devise?view=asciicast) (which uses Rails 3) for a step-by-step introduction. The docs will be fully current. 4. Users can send Friend Requests to other Users. 5. A User must accept the Friend Request to become friends. 6. The Friend Request shows up in the notifications section of a User's navbar. 7. Users can create Posts (text only to start). 8. Users can Like Posts. 9. Users can Comment on Posts. 10. Posts should always display with the post content, author, comments and likes. 11. Treat the Posts Index page like the real Facebook's "Timeline" feature -- show all the recent posts from the current user and users she is friends with. 12. Users can create a Profile with their personal information and a photo. You can use [Gravatar](https://en.gravatar.com/) for this photo. 13. The User Show page contains their Profile information, photo, and Posts. 14. The Users Index page lists all users and buttons for sending Friend Requests to those who are not already friends or who don't already have a pending request. 15. Sign in should use [OmniAuth](https://github.com/plataformatec/devise/wiki/OmniAuth:-Overview) to allow a user to sign in with their real Facebook account. See the [RailsCast](http://railscasts.com/episodes/360-facebook-authentication?view=asciicast) on FB authentication with Devise for a step-by-step look at how it works. 16. Set up a [mailer](http://guides.rubyonrails.org/action_mailer_basics.html) to send a welcome email when a new user signs up. Use the `letter_opener` gem ([see docs here](https://github.com/ryanb/letter_opener)) to test it in development mode. 17. Deploy your App to Heroku. 18. Set up the [SendGrid add-on](https://devcenter.heroku.com/articles/sendgrid) and start sending real emails. It's free for low usage tiers.

Extra Credit

1. Make posts also allow images (either just via a URL or, more complicated, by uploading one).
2. Use the Active Storage to allow users to upload a photo to their profile.
3. Make your post able to be either a text OR a photo by using a polymorphic association (so users can still like or comment on it while being none-the-wiser).