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path: root/app/helpers/gitlab/tree_helper.rb
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module Gitlab
  module TreeHelper
    # Sorts a repository's tree so that folders are before files and renders
    # their corresponding partials
    #
    def render_tree(tree)
      # Render Folders before Files/Submodules
      folders, files, submodules = tree.trees, tree.blobs, tree.submodules

      tree = ""

      # Render folders if we have any
      tree << render(partial: 'projects/tree/tree_item', collection: folders,
                     locals: { type: 'folder' }) if folders.present?

      # Render files if we have any
      tree << render(partial: 'projects/tree/blob_item', collection: files,
                     locals: { type: 'file' }) if files.present?

      # Render submodules if we have any
      tree << render(partial: 'projects/tree/submodule_item',
                     collection: submodules) if submodules.present?

      tree.html_safe
    end

    def render_readme(readme)
      render_markup(readme.name, readme.data)
    end

    # Return an image icon depending on the file type and mode
    #
    # type - String type of the tree item; either 'folder' or 'file'
    # mode - File unix mode
    # name - File name
    def tree_icon(type, mode, name)
      icon("#{file_type_icon_class(type, mode, name)} fw")
    end

    def tree_hex_class(content)
      "file_#{hexdigest(content.name)}"
    end

    # Simple shortcut to File.join
    def tree_join(*args)
      File.join(*args)
    end

    def allowed_tree_edit?(project = nil, ref = nil)
      project ||= @project
      ref ||= @ref
      return false unless project.repository.branch_names.include?(ref)

      ::Gitlab::GitAccess.new(current_user, project).can_push_to_branch?(ref)
    end

    def tree_breadcrumbs(tree, max_links = 2)
      if @path.present?
        part_path = ""
        parts = @path.split('/')

        yield('..', nil) if parts.count > max_links

        parts.each do |part|
          part_path = File.join(part_path, part) unless part_path.empty?
          part_path = part if part_path.empty?

          next unless parts.last(2).include?(part) if parts.count > max_links
          yield(part, tree_join(@ref, part_path))
        end
      end
    end

    def up_dir_path
      file = File.join(@path, "..")
      tree_join(@ref, file)
    end

    # returns the relative path of the first subdir that doesn't have only one directory descendant
    def flatten_tree(tree)
      subtree = Gitlab::Git::Tree.where(@repository, @commit.id, tree.path)
      if subtree.count == 1 && subtree.first.dir?
        return tree_join(tree.name, flatten_tree(subtree.first))
      else
        return tree.name
      end
    end
  end
end