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path: root/app/helpers/commits_helper.rb
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# encoding: utf-8
module CommitsHelper
  # Returns a link to the commit author. If the author has a matching user and
  # is a member of the current @project it will link to the team member page.
  # Otherwise it will link to the author email as specified in the commit.
  #
  # options:
  #  avatar: true will prepend the avatar image
  #  size:   size of the avatar image in px
  def commit_author_link(commit, options = {})
    commit_person_link(commit, options.merge(source: :author))
  end

  # Just like #author_link but for the committer.
  def commit_committer_link(commit, options = {})
    commit_person_link(commit, options.merge(source: :committer))
  end

  def image_diff_class(diff)
    if diff.deleted_file
      "deleted"
    elsif diff.new_file
      "added"
    else
      nil
    end
  end

  def commit_to_html(commit, project, inline = true)
    template = inline ? "inline_commit" : "commit"
    escape_javascript(render "projects/commits/#{template}", commit: commit, project: project) unless commit.nil?
  end

  # Breadcrumb links for a Project and, if applicable, a tree path
  def commits_breadcrumbs
    return unless @project && @ref

    # Add the root project link and the arrow icon
    crumbs = content_tag(:li) do
      link_to(
        @project.path,
        namespace_project_commits_path(@project.namespace, @project, @ref)
      )
    end

    if @path
      parts = @path.split('/')

      parts.each_with_index do |part, i|
        crumbs << content_tag(:li) do
          # The text is just the individual part, but the link needs all the parts before it
          link_to(
            part,
            namespace_project_commits_path(
              @project.namespace,
              @project,
              tree_join(@ref, parts[0..i].join('/'))
            )
          )
        end
      end
    end

    crumbs.html_safe
  end

  # Return Project default branch, if it present in array
  # Else - first branch in array (mb last actual branch)
  def commit_default_branch(project, branches)
    branches.include?(project.default_branch) ? branches.delete(project.default_branch) : branches.pop
  end

  # Returns the sorted alphabetically links to branches, separated by a comma
  def commit_branches_links(project, branches)
    branches.sort.map do |branch|
      link_to(
        namespace_project_tree_path(project.namespace, project, branch)
      ) do
        content_tag :span, class: 'label label-gray' do
          icon('code-fork') + ' ' + branch
        end
      end
    end.join(" ").html_safe
  end

  # Returns the sorted links to tags, separated by a comma
  def commit_tags_links(project, tags)
    sorted = VersionSorter.rsort(tags)
    sorted.map do |tag|
      link_to(
        namespace_project_commits_path(project.namespace, project,
                                       project.repository.find_tag(tag).name)
      ) do
        content_tag :span, class: 'label label-gray' do
          icon('tag') + ' ' + tag
        end
      end
    end.join(" ").html_safe
  end

  def link_to_browse_code(project, commit)
    if current_controller?(:projects, :commits)
      if @repo.blob_at(commit.id, @path)
        return link_to(
          "Browse File »",
          namespace_project_blob_path(project.namespace, project,
                                      tree_join(commit.id, @path)),
          class: "pull-right"
        )
      elsif @path.present?
        return link_to(
          "Browse Directory »",
          namespace_project_tree_path(project.namespace, project,
                                      tree_join(commit.id, @path)),
          class: "pull-right"
        )
      end
    end
    link_to(
      "Browse Files »",
      namespace_project_tree_path(project.namespace, project, commit),
      class: "pull-right"
    )
  end

  def revert_commit_link(commit, continue_to_path, btn_class: nil)
    return unless current_user

    tooltip = "Revert this #{revert_commit_type(commit)} in a new merge request"

    if can_collaborate_with_project?
      content_tag :span, 'data-toggle' => 'modal', 'data-target' => '#modal-revert-commit' do
        link_to 'Revert', '#modal-revert-commit', 'data-toggle' => 'tooltip', 'data-container' => 'body', title: tooltip, class: "btn btn-default btn-grouped btn-#{btn_class}"
      end
    elsif can?(current_user, :fork_project, @project)
      continue_params = {
        to: continue_to_path,
        notice: edit_in_new_fork_notice + ' Try to revert this commit again.',
        notice_now: edit_in_new_fork_notice_now
      }
      fork_path = namespace_project_forks_path(@project.namespace, @project,
        namespace_key: current_user.namespace.id,
        continue: continue_params)

      link_to 'Revert', fork_path, class: 'btn btn-grouped btn-close', method: :post, 'data-toggle' => 'tooltip', 'data-container' => 'body', title: tooltip
    end
  end

  def revert_commit_type(commit)
    if commit.merged_merge_request
      'merge request'
    else
      'commit'
    end
  end

  protected

  # Private: Returns a link to a person. If the person has a matching user and
  # is a member of the current @project it will link to the team member page.
  # Otherwise it will link to the person email as specified in the commit.
  #
  # options:
  #  source: one of :author or :committer
  #  avatar: true will prepend the avatar image
  #  size:   size of the avatar image in px
  def commit_person_link(commit, options = {})
    user = commit.send(options[:source])

    source_name = clean(commit.send "#{options[:source]}_name".to_sym)
    source_email = clean(commit.send "#{options[:source]}_email".to_sym)

    person_name = user.try(:name) || source_name
    person_email = user.try(:email) || source_email

    text =
      if options[:avatar]
        avatar = image_tag(avatar_icon(person_email, options[:size]), class: "avatar #{"s#{options[:size]}" if options[:size]}", width: options[:size], alt: "")
        %Q{#{avatar} <span class="commit-#{options[:source]}-name">#{person_name}</span>}
      else
        person_name
      end

    options = {
      class: "commit-#{options[:source]}-link has-tooltip",
      data: { 'original-title'.to_sym => sanitize(source_email) }
    }

    if user.nil?
      mail_to(source_email, text.html_safe, options)
    else
      link_to(text.html_safe, user_path(user), options)
    end
  end

  def view_file_btn(commit_sha, diff, project)
    link_to(
      namespace_project_blob_path(project.namespace, project,
                                  tree_join(commit_sha, diff.new_path)),
      class: 'btn view-file js-view-file'
    ) do
      raw('View file @') + content_tag(:span, commit_sha[0..6],
                                       class: 'commit-short-id')
    end
  end

  def truncate_sha(sha)
    Commit.truncate_sha(sha)
  end

  def clean(string)
    Sanitize.clean(string, remove_contents: true)
  end

  def limited_commits(commits)
    if commits.size > MergeRequestDiff::COMMITS_SAFE_SIZE
      [
        commits.first(MergeRequestDiff::COMMITS_SAFE_SIZE),
        commits.size - MergeRequestDiff::COMMITS_SAFE_SIZE
      ]
    else
      [commits, 0]
    end
  end
end