Tree folders view

app/assets/javascripts/folder.coffee

@@ -1,3 +1,11 @@
 # Place all the behaviors and hooks related to the matching controller here.
 # All this logic will automatically be available in application.js.
 # You can use CoffeeScript in this file: http://coffeescript.org/
+
+$ ->
+  $('.tree_menu').delegate ".toggleable_folder", "click", ->
+    target = $(this)
+    if target.hasClass('glyphicon-plus')
+      target.removeClass('glyphicon-plus').addClass('glyphicon-minus')
+    else if target.hasClass('glyphicon-minus')
+      target.addClass('glyphicon-plus').removeClass('glyphicon-minus')

app/assets/stylesheets/application.css.scss

@@ -23,4 +23,29 @@ body{
 
 .nested_folders {
   margin-left: 30px;
-}
+}
+
+.list-group {
+  ul {
+    list-style-type: none;
+    .glyphicon {
+      cursor: pointer;
+    }
+    a {
+      color: black;
+      text-decoration: none;
+      span:hover {
+        text-decoration: underline;
+      }
+    };
+  };
+  li > ul {
+    list-style-type: none;
+  };
+  .glyphicon-minus ~ ul {
+    display: block;
+  }
+  .glyphicon-plus ~ ul {
+    display: none;
+  };
+};

app/assets/stylesheets/folders.css.scss

@@ -1,4 +1,3 @@
 // Place all the styles related to the folder controller here.
 // They will automatically be included in application.css.
-// You can use Sass (SCSS) here: http://sass-lang.com/
-
+// You can use Sass (SCSS) here: http://sass-lang.com/

app/views/shared/_menu.html.slim

@@ -0,0 +1,6 @@
+.tree_menu
+  .panel
+    .panel-heading
+      h4 Folders
+    .list-group
+      = render 'shared/tree', :folders => Folder.roots.order("created_at asc")

app/views/shared/_tree.html.slim

@@ -0,0 +1,11 @@
+ul
+  - folders.each do |folder|
+    li
+      - if folder.has_children?
+        span.glyphicon.toggleable_folder class=(@folder && @folder.ancestor_ids.include?(folder.id) ? 'glyphicon-minus' : "glyphicon-plus" )
+      - else
+        span.glyphicon
+      '&nbsp
+      = link_to "#{content_tag(:span, "", :class => 'glyphicon glyphicon-folder-close')} #{content_tag(:span, folder.name)}".html_safe, folder_path(folder)
+      - if folder.has_children?
+        = render 'shared/tree', :folders => folder.children.order("created_at asc")

app/views/static_pages/landing.html.slim

@@ -1 +1,7 @@
-h1= @greeting
+h1= @greeting
+
+= render "shared/menu"
+
+/folder
+/= nested_folders Folder.all.arrange(:order => :created_at)
+