1 files changed, 9 insertions, 10 deletions
diff --git a/src/main/scala/reading/models/Book.scala b/src/main/scala/reading/models/Book.scala
index 1e4b81a..b856b7d 100644
--- a/src/main/scala/reading/models/Book.scala
+++ b/src/main/scala/reading/models/Book.scala
@@ -1,21 +1,20 @@
 package reading.models
 
-case class Book(
+case class Book (
   title: String,
   author: String,
   genres: Seq[Genre],
   themes: Seq[Theme]
-)
+) extends Ordered[Book] {
+  def compare(that: Book) = {
+    def formatTitle(title: String) =
+      title.toLowerCase.replaceAll("^les ", "").replaceAll("^le ", "")
 
-object Book {
-  def all: Seq[Book] = Seq(
-    Book("Les dix petits nègres", "Agatha Christie", Seq(Genre.Detective), Seq(Theme.Fear)),
-    Book("Le joueur", "Fiódor Dostoyevski", Seq(Genre.Adventure), Seq(Theme.Fear)),
-    Book("Voyage au bout de la nuit", "Céline", Seq(Genre.Adventure), Seq(Theme.Fear)),
-    Book("Le petit prince", "Antoine de Saint Exupéry", Seq(Genre.Adventure), Seq(Theme.Friendship)),
-    Book("Les frères Karamazov", "Fiódor Dostoyevski", Seq(Genre.Adventure), Seq(Theme.Family))
-  )
+    formatTitle(this.title).compare(formatTitle(that.title))
+  }
+}
 
+object Book {
   def filter(books: Seq[Book], filters: Seq[Filter]): Seq[Book] =
     books.filter(b => filters.forall(_.filter(b)))
 }