+ def style_rules
+ css = ""
+
+ css << ".hidden { display: none }";
+ css << ".hide_unless_logged_in { display: none }" unless @user;
+ css << ".hide_if_logged_in { display: none }" if @user;
+ css << ".hide_if_user_#{@user.id} { display: none }" if @user;
+ css << ".show_if_user_#{@user.id} { display: inline }" if @user;
+ css << ".hide_unless_administrator { display: none }" unless @user and @user.administrator?;
+
+ return content_tag(:style, css)
+ end
+
+ def if_logged_in(tag = :div, &block)
+ concat(content_tag(tag, capture(&block), :class => "hide_unless_logged_in"))
+ end
+
+ def if_not_logged_in(tag = :div, &block)
+ concat(content_tag(tag, capture(&block), :class => "hide_if_logged_in"))
+ end
+
+ def if_user(user, tag = :div, &block)
+ if user
+ concat(content_tag(tag, capture(&block), :class => "hidden show_if_user_#{user.id}"))
+ end
+ end
+
+ def unless_user(user, tag = :div, &block)
+ if user
+ concat(content_tag(tag, capture(&block), :class => "hide_if_user_#{user.id}"))
+ else
+ concat(content_tag(tag, capture(&block)))
+ end
+ end
+
+ def if_administrator(tag = :div, &block)
+ concat(content_tag(tag, capture(&block), :class => "hide_unless_administrator"))
+ end
+
+ def describe_location(lat, lon, zoom = nil, language = nil)
+ zoom = zoom || 14
+ language = language || request.user_preferred_languages.join(',')
+ url = "http://nominatim.openstreetmap.org/reverse?lat=#{lat}&lon=#{lon}&zoom=#{zoom}&accept-language=#{language}"
+
+ begin
+ response = Timeout::timeout(4) do
+ REXML::Document.new(Net::HTTP.get(URI.parse(url)))
+ end
+ rescue Exception
+ response = nil
+ end
+
+ if response and result = response.get_text("reversegeocode/result")
+ result.to_s
+ else
+ "#{number_with_precision(lat, :precision => 3)}, #{number_with_precision(lon, :precision => 3)}"
+ end
+ end
+
+ def user_image(user, options = {})
+ options[:class] ||= "user_image"
+
+ if user.image
+ image_tag url_for_file_column(user, "image"), options
+ else
+ image_tag "anon_large.png", options
+ end
+ end
+
+ def user_thumbnail(user, options = {})
+ options[:class] ||= "user_thumbnail"
+
+ if user.image
+ image_tag url_for_file_column(user, "image"), options
+ else
+ image_tag "anon_small.png", options
+ end
+ end
+