Noosfero/noosfero

module ThemeManagerHelper
  def unzip_file(file, destination)
    Open3.popen3({ "LANG" => "C.UTF-8" }, "unzip", file, "-d", destination) do |stdin, stdout, stderr, io|
      stderr = stderr.read
      success = io.value.success?
      return success, stderr
    end
  end

  def validate_theme_files(theme_dir)
    begin
      conf = YAML::load File.read(File.join(theme_dir, "theme.yml"))
      if conf.empty?
        return { error: _("theme.yml is empty.") }
      end
      unless conf["name"]
        return { error: _("theme.yml has no name.") }
      end
    rescue Exception => err
      return { error: err.message }
    end
    return { name: conf["name"] }
  end

  def find_theme_root(base_dir)
    path = `find #{base_dir} -name theme.yml`.split("\n").first
    if path.empty?
      base_dir
    else
      path[0..-11] # extract 'theme.yml' from path
    end
  end

  def activate_theme(theme_dir, theme_name, env)
    begin
      FileUtils.cp_r theme_dir, "public/designs/themes/" + theme_name.to_slug
      env.add_themes [theme_name.to_slug]
      env.save!
      return true, nil
    rescue Exception => err
      return false, err
    end
  end

  def get_theme_package(temp, pack)
    zip = File.join temp, "package.zip"
    File.open(zip, "wb") do |f|
      f.write pack.read
    end
    file_type = `file -b --mime-type #{zip}`.strip
    return { zip: zip, file_type: file_type }
  end

  def list_enabled_themes
    visible_themes = environment.themes.map &:id
    instaled_dir = File.join Rails.root, "/public/designs/themes/"
    enabled_themes =
      Dir.glob(instaled_dir + "/*")
         .map { |d| d.split("/").last }
         .select { |d| d != "disabled_themes" }
         .inject({}) do |memo, theme|
        conf = YAML::load File.read File.join(instaled_dir, theme, "theme.yml")
        memo[theme] = { visible: visible_themes.include?(theme), name: conf["name"] }
        memo
      end
  end

  def list_disabled_themes
    disabled_dir = File.join Rails.root, "/public/designs/themes/disabled_themes"
    disabled_themes = (Dir.exists? (disabled_dir)) ? Dir.glob(disabled_dir + "/*")
                                                        .map { |d| d.split("/").last }
                                                        .select { |d| d != "." && d != ".." } : []
  end
end