module ApplicationHelper

  class CategoryLinks

    def initialize(current_category, view_context)
      @current_category = current_category
      @view_context = view_context
    end

    def link_to(*args)
      @view_context.link_to_category(@current_category, *args)
    end

  end

  def current_user
    decorated_current_user
  end

  def page_title
    if content_for?(:title)
      "#{content_for(:title)} - asciinema".html_safe
    else
      "asciinema - Record and share your terminal sessions, the right way"
    end
  end

  def category_links(current_category, &blk)
    links = CategoryLinks.new(current_category, self)

    content_tag(:ul, class: 'nav nav-pills nav-stacked') do
      blk.call(links)
    end
  end

  def link_to_category(current_category, text, url, name)
    opts = {}

    if name == current_category
      opts[:class] = 'active'
    end

    content_tag(:li, link_to(text, url), opts)
  end

  def time_ago_tag(time, options = {})
    options[:class] ||= "timeago"
    content_tag(:abbr, time.to_s, options.merge(:title => time.getutc.iso8601))
  end

  def default_user_theme_label(theme = Theme.default)
    "Default (#{theme.label})"
  end

  def default_asciicast_theme_label(theme)
    "Default account theme (#{theme.label})"
  end

  def themes_for_select
    Theme::AVAILABLE.invert
  end

  def flash_notifications
    flash.select { |type, _| [:notice, :alert].include?(type.to_sym) }
  end

end