Refactor app in to its own slice

slices/main/decorators/books/decorator.rb

@@ -0,0 +1,53 @@
+# frozen_string_literal: false
+
+# auto_register: false
+
+module Main
+  module Decorators
+    module Books
+      class Decorator < SimpleDelegator
+        def display_published_at
+          published_at.strftime("%e %B, %Y")
+        end
+
+        def machine_published_at
+          published_at.rfc2822
+        end
+
+        def syndicated?
+          !syndication_sources.empty?
+        end
+
+        def template_type
+          :book
+        end
+
+        def authors
+          book_author.split(";").join(" ")
+        end
+
+        def status_colour
+          case book_status
+          when "read" || "finished"
+            "text-green-100 bg-green-500"
+          when "to-read"
+            "text-blue-100 bg-blue-500"
+          when "reading"
+            "text-orange-100 bg-orange-500"
+          end
+        end
+
+        def status_label
+          case book_status
+          when "read" || "finished"
+            "Read"
+          when "to-read"
+            "To read"
+          when "reading"
+            "Reading"
+          end
+        end
+      end
+    end
+  end
+end