```ruby
class BookmarksController < ApplicationController

  get '/bookmarks' do
    @bookmarks = Bookmark.all
    erb :'/bookmarks/index'
  end

  get '/bookmarks/new' do
    @bookmark = Bookmark.new
    erb :'/bookmarks/new'
  end

  post '/bookmarks/new' do
    @bookmark = Bookmark.new(url: params[:url], title: params[:title], description: params[:description])
    @bookmark.user = current_user
    if @bookmark.save
      erb :'/bookmarks/show', locals: {message: "Successfully created bookmark."}
    else
      erb :'/bookmarks/new'
    end
  end

  get '/bookmarks/:id' do
    @bookmark = Bookmark.find_by_id(params[:id])
    erb :'/bookmarks/show'
  end

  get '/bookmarks/:id/edit' do
    if session[:user_id] == current_user
      @bookmark = Bookmark.find_by_id(params[:id])
      erb :'/bookmarks/edit'
    else
      redirect '/login'
    end
  end

  patch '/bookmarks/:id' do
    @bookmark = Bookmark.find_by_id(params[:id])
    @bookmark.update(url: params[:url], title: params[:title], description: params[:description])
    redirect "/bookmarks/#{@bookmark.id}"
  end

  delete '/bookmarks/:id/delete' do
    @bookmark = Bookmark.find_by_id(params[:id])
    @bookmark.delete
    redirect '/bookmarks'
  end
end
```

Verify user is logged in to view and create new bookmark
user
```ruby
class BookmarksController < ApplicationController

  get '/bookmarks' do
    if logged_in?
      @bookmarks = Bookmark.all
      erb :'/bookmarks/index'
    else
      redirect '/login'
    end
  end

  get '/bookmarks/new' do
    if logged_in?
      @bookmark = Bookmark.new
      erb :'/bookmarks/new'
    else
      redirect '/login'
    end
  end

  post '/bookmarks/new' do
    @bookmark = Bookmark.new(url: params[:url], title: params[:title], description: params[:description])
    @bookmark.user = current_user
    if @bookmark.save
      erb :'/bookmarks/show', locals: {message: "Successfully created bookmark."}
    else
      erb :'/bookmarks/new'
    end
  end

  get '/bookmarks/:id' do
    if logged_in?
      @bookmark = Bookmark.find_by_id(params[:id])
      erb :'/bookmarks/show'
    else
      redirect '/login'
    end
  end

  get '/bookmarks/:id/edit' do
    if session[:user_id] == current_user
      @bookmark = Bookmark.find_by_id(params[:id])
      erb :'/bookmarks/edit'
    else
      redirect '/login'
    end
  end

  patch '/bookmarks/:id' do
    @bookmark = Bookmark.find_by_id(params[:id])
    @bookmark.update(url: params[:url], title: params[:title], description: params[:description])
    redirect "/bookmarks/#{@bookmark.id}"
  end

  delete '/bookmarks/:id/delete' do
    @bookmark = Bookmark.find_by_id(params[:id])
    @bookmark.delete
    redirect '/bookmarks'
  end
end
```
assistant