Refactor app in to its own slice

slices/main/views/trips/show.rb

@@ -0,0 +1,29 @@
+module Main
+  module Views
+    module Trips
+      class Show< Main::View
+        include Deps[
+                  "repos.trip_repo"
+                ]
+
+        expose :posts do |trip|
+          trip.posts.sort { |p, x| p.published_at.to_i <=> x.published_at.to_i }.map do |post|
+            Decorators::Posts::Decorator.new(post)
+          end
+        end
+
+        expose :places do |posts|
+          posts.map do |post|
+            next if post.location.nil?
+            p = Decorators::Posts::Decorator.new(post)
+            [p.lon, p.lat]
+          end.compact
+        end
+
+        expose :trip do |id:|
+          trip_repo.fetch!(id)
+        end
+      end
+    end
+  end
+end