Here is the code for this video

package com.teamtreehouse.courses.model;

public class CourseIdea {
    private String title;
    private String creator;

    public CourseIdea(String title, String creator) {
        this.title = title;
        this.creator = creator;
    }

    public String getTitle() {
        return title;
    }

    public String getCreator() {
        return creator;
    }

    @Override 
    public boolean equals(Object o) {
        if (this == o) return true; 
        if (o == null || getClass() != o.getClass()) return false;

        CourseIdea that = (CourseIdea) o;

        if (title != null ? !title.equals(that.title) : that.title != null) return false;
        return creator != null ? creator.equals(that.creator) : that.creator == null;
    }

    @Override 
    public int hashCode() {
        int result = title != null ? title.hashCode() : 0;
        result = 31 * result + (creator != null ? creator.hashCode() : 0);
        return result;
    }
}

package com.teamtreehouse.courses.model;

import java.util.List;
import java.util.ArrayList;

public interface CourseIdeaDAO {
    boolean add(CourseIdea idea);

    List<CourseIdea> findAll();
}

package com.teamtreehouse.courses.model;

import java.util.ArrayList;
import java.util.List;


public class SimpleCourseIdeaDAO implements CourseIdeaDAO {
    private List<CourseIdea> ideas;


    public SimpleCourseIdeaDAO() {
        ideas = new ArrayList<>();
    }

    @Override 
    public boolean add(CourseIdea idea) {
        return ideas.add(idea);
    }

    @Override 
    public List<CourseIdea> findAll() {
        return new ArrayList<>(ideas);
    }
}

package com.teamtreehouse.courses;

import com.teamtreehouse.courses.model.CourseIdea;
import com.teamtreehouse.courses.model.CourseIdeaDAO;
import com.teamtreehouse.courses.model.SimpleCourseIdeaDAO;

import java.util.HashMap;
import java.util.Map;

import spark.ModelAndView;
import spark.template.handlebars.HandlebarsTemplateEngine; 

import static spark.Spark.*;

public class Main {
    public static void main(String[] args) {

        CourseIdeaDAO dao = new SimpleCourseIdeaDAO();

        // show something or "get" something. 
        get("/", (req, res) -> {
            Map<String, String> model = new HashMap<String, String>();
            model.put("username", req.cookie("username"));
            return new ModelAndView(model, "index.hbs");
        }, new HandlebarsTemplateEngine());

        // create something
        post("/sign-in", (req, res) -> {
            Map<String, String> model = new HashMap<>();
            String username = req.queryParams("username");
            // set the cookie
            res.cookie("username", username);
            model.put("username", username);
            return new ModelAndView(model, "sign-in.hbs");
        }, new HandlebarsTemplateEngine());
    }
}