# server.rb
require 'sinatra'
require "sinatra/namespace"
require 'mongoid'

# DB Setup
Mongoid.load! "mongoid.config"

# Models
class Book
  include Mongoid::Document

  field :title, type: String
  field :author, type: String
  field :isbn, type: String

  validates :title, presence: true
  validates :author, presence: true
  validates :isbn, presence: true

  index({ title: 'text' })
  index({ isbn: 1 }, { unique: true, name: "isbn_index" })

  scope :title, -> (title) { where(title: /^#{title}/) }
  scope :isbn, -> (isbn) { where(isbn: isbn) }
  scope :author, -> (author) { where(author: author) }
end