transferred Code Ocean from original repository to GitHub

lib/file_tree.rb

@@ -0,0 +1,75 @@
+class FileTree < Tree::TreeNode
+  def file_icon(file)
+    if file.file_type.audio?
+      'fa fa-file-audio-o'
+    elsif file.file_type.image?
+      'fa fa-file-image-o'
+    elsif file.file_type.video?
+      'fa fa-file-video-o'
+    elsif file.read_only?
+      'fa fa-lock'
+    elsif file.file_type.executable?
+      'fa fa-file-code-o'
+    elsif file.file_type.renderable?
+      'fa fa-file-text-o'
+    else
+      'fa fa-file-o'
+    end
+  end
+  private :file_icon
+
+  def folder_icon
+    'fa fa-folder-o'
+  end
+  private :folder_icon
+
+  def initialize(files)
+    super(root_label)
+    files.each do |file|
+      parent = self
+      (file.path || '').split('/').each do |segment|
+        node = parent.children.detect { |child| child.name == segment } || parent.add(Tree::TreeNode.new(segment))
+        parent = node
+      end
+      parent.add(Tree::TreeNode.new(file.name_with_extension, file))
+    end
+  end
+
+  def map_to_js_tree(node)
+    {
+      children: node.children.map { |child| map_to_js_tree(child) },
+      icon: node_icon(node),
+      id: node.content.try(:ancestor_id),
+      state: {
+        disabled: !node.is_leaf?,
+        opened: !node.is_leaf?
+      },
+      text: node.name
+    }
+  end
+  private :map_to_js_tree
+
+  def node_icon(node)
+    if node.is_root?
+      folder_icon
+    elsif node.is_leaf?
+      file_icon(node.content)
+    else
+      folder_icon
+    end
+  end
+  private :node_icon
+
+  def root_label
+    I18n.t('exercises.editor_file_tree.file_root')
+  end
+  private :root_label
+
+  def to_js_tree
+    {
+      core: {
+        data: map_to_js_tree(self)
+      }
+    }.to_json
+  end
+end