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path: root/app/helpers/search_helper.rb
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module SearchHelper
  def search_autocomplete_opts(term)
    return unless current_user

    resources_results = [
      groups_autocomplete(term),
      projects_autocomplete(term)
    ].flatten

    search_pattern = Regexp.new(Regexp.escape(term), "i")

    generic_results = project_autocomplete + default_autocomplete + help_autocomplete
    generic_results.select! { |result| result[:label] =~ search_pattern }

    [
      resources_results,
      generic_results
    ].flatten.uniq do |item|
      item[:label]
    end
  end

  def search_entries_info(collection, scope, term)
    return unless collection.count > 0

    from = collection.offset_value + 1
    to = collection.offset_value + collection.length
    count = collection.total_count

    "Showing #{from} - #{to} of #{count} #{scope.humanize(capitalize: false)} for \"#{term}\""
  end

  def parse_search_result(result)
    ref = nil
    filename = nil
    basename = nil
    startline = 0

    result.each_line.each_with_index do |line, index|
      if line =~ /^.*:.*:\d+:/
        ref, filename, startline = line.split(':')
        startline = startline.to_i - index
        extname = Regexp.escape(File.extname(filename))
        basename = filename.sub(/#{extname}$/, '')
        break
      end
    end

    data = ""

    result.each_line do |line|
      data << line.sub(ref, '').sub(filename, '').sub(/^:-\d+-/, '').sub(/^::\d+:/, '')
    end

    OpenStruct.new(
      filename: filename,
      basename: basename,
      ref: ref,
      startline: startline,
      data: data
    )
  end

  private

  # Autocomplete results for various settings pages
  def default_autocomplete
    [
      { category: "Settings", label: "Profile settings", url: profile_path },
      { category: "Settings", label: "SSH Keys",         url: profile_keys_path },
      { category: "Settings", label: "Dashboard",        url: root_path },
      { category: "Settings", label: "Admin Section",    url: admin_root_path },
    ]
  end

  # Autocomplete results for internal help pages
  def help_autocomplete
    [
      { category: "Help", label: "API Help",           url: help_page_path("api/README") },
      { category: "Help", label: "Markdown Help",      url: help_page_path("user/markdown") },
      { category: "Help", label: "Permissions Help",   url: help_page_path("user/permissions") },
      { category: "Help", label: "Public Access Help", url: help_page_path("public_access/public_access") },
      { category: "Help", label: "Rake Tasks Help",    url: help_page_path("raketasks/README") },
      { category: "Help", label: "SSH Keys Help",      url: help_page_path("ssh/README") },
      { category: "Help", label: "System Hooks Help",  url: help_page_path("system_hooks/system_hooks") },
      { category: "Help", label: "Webhooks Help",      url: help_page_path("web_hooks/web_hooks") },
      { category: "Help", label: "Workflow Help",      url: help_page_path("workflow/README") },
    ]
  end

  # Autocomplete results for the current project, if it's defined
  def project_autocomplete
    if @project && @project.repository.exists? && @project.repository.root_ref
      ref = @ref || @project.repository.root_ref

      [
        { category: "Current Project", label: "Files",          url: namespace_project_tree_path(@project.namespace, @project, ref) },
        { category: "Current Project", label: "Commits",        url: namespace_project_commits_path(@project.namespace, @project, ref) },
        { category: "Current Project", label: "Network",        url: namespace_project_network_path(@project.namespace, @project, ref) },
        { category: "Current Project", label: "Graph",          url: namespace_project_graph_path(@project.namespace, @project, ref) },
        { category: "Current Project", label: "Issues",         url: namespace_project_issues_path(@project.namespace, @project) },
        { category: "Current Project", label: "Merge Requests", url: namespace_project_merge_requests_path(@project.namespace, @project) },
        { category: "Current Project", label: "Milestones",     url: namespace_project_milestones_path(@project.namespace, @project) },
        { category: "Current Project", label: "Snippets",       url: namespace_project_snippets_path(@project.namespace, @project) },
        { category: "Current Project", label: "Members",        url: namespace_project_project_members_path(@project.namespace, @project) },
        { category: "Current Project", label: "Wiki",           url: namespace_project_wikis_path(@project.namespace, @project) },
      ]
    else
      []
    end
  end

  # Autocomplete results for the current user's groups
  def groups_autocomplete(term, limit = 5)
    current_user.authorized_groups.search(term).limit(limit).map do |group|
      {
        category: "Groups",
        id: group.id,
        label: "#{search_result_sanitize(group.name)}",
        url: group_path(group)
      }
    end
  end

  # Autocomplete results for the current user's projects
  def projects_autocomplete(term, limit = 5)
    current_user.authorized_projects.search_by_title(term).
      sorted_by_stars.non_archived.limit(limit).map do |p|
      {
        category: "Projects",
        id: p.id,
        value: "#{search_result_sanitize(p.name)}",
        label: "#{search_result_sanitize(p.name_with_namespace)}",
        url: namespace_project_path(p.namespace, p)
      }
    end
  end

  def search_result_sanitize(str)
    Sanitize.clean(str)
  end

  def search_filter_path(options = {})
    exist_opts = {
      search: params[:search],
      project_id: params[:project_id],
      group_id: params[:group_id],
      scope: params[:scope],
      repository_ref: params[:repository_ref]
    }

    options = exist_opts.merge(options)
    search_path(options)
  end

  # Sanitize a HTML field for search display. Most tags are stripped out and the
  # maximum length is set to 200 characters.
  def search_md_sanitize(object, field)
    html = markdown_field(object, field)
    html = Truncato.truncate(
      html,
      count_tags: false,
      count_tail: false,
      max_length: 200
    )

    # Truncato's filtered_tags and filtered_attributes are not quite the same
    sanitize(html, tags: %w(a p ol ul li pre code))
  end
end