Basic crud ops example with book ratings

books_simple_crud.rb

books = {
  "The 57 Bus": 5.0,
  "Under The Udala Trees": 4.5,
  "Last Night At The Telegaph Club": 5.0,
}

puts "What do you wanna do? type:"
puts "`add` to add a book"
puts "`view` to see all books"
puts "`update` to update a book"
puts "`delete` to delete a book"

command = gets.chomp

case command
  when "add"
    puts "What book would you like to add?"
    title = gets.chomp
    puts "From 1-5, how would your rate #{title}?"
    rating = gets.chomp
    if books[title.to_sym] == nil
      books[title.to_sym] = rating.to_i
      puts "Added #{title} with a rating of #{rating}!"
    else
      puts "Oops, you already rated that book"
    end
  when "view"
    books.each {|book, rating| puts "#{book}: #{rating}"}
  when "update"
    puts "What book rating would you like to update?"
    title = gets.chomp
    if books[title.to_sym] == nil
      puts "you may want to add #{title} as you don't have it yet"
    else
      puts "How would your rate #{title}?"
      rating = gets.chomp
      books[title.to_sym] = rating.to_i
      puts "Updated #{title} to #{rating}!"
    end
  when "delete"
    puts "What book would you like to delete?"
    title = gets.chomp
    if books[title.to_sym] == nil
      puts "#{title} doesn't exist"
    else
      books.delete(title.to_sym)
     puts "Deleted #{title}"
    end
  else
    puts "Beep boop, error. Are you sure you gave the right command?"
end