Add liveStreamingDetails and timezone magic.

app.rb

@@ -90,7 +90,9 @@
       og = OpenGraph.new("https://www.youtube.com/channel/#{channel_id}")
       username = og.url.split("/")[-1]
       username = og.title if username == channel_id
-      redirect "/youtube/#{channel_id}/#{username}?eventType=live,upcoming"
+      url = "/youtube/#{channel_id}/#{username}?eventType=live,upcoming"
+      url += "&tz=#{params[:tz]}" if params[:tz]
+      redirect url
     else
       redirect "https://www.youtube.com/feeds/videos.xml?channel_id=#{channel_id}"
     end
@@ -104,6 +106,7 @@
 get "/youtube/:channel_id/:username" do
   @channel_id = params[:channel_id]
   @username = params[:username]
+  @tz = params[:tz]
 
   query = { part: "snippet", type: "video", order: "date", channelId: params[:channel_id], maxResults: 50 }
   query[:q] = params[:q] if params[:q]
@@ -119,6 +122,17 @@
     @data = response.parsed_response["items"]
   end
 
+  ids = @data.select { |v| %w[upcoming live].include?(v["snippet"]["liveBroadcastContent"]) }.map { |v| v["id"]["videoId"] }
+  if ids.any?
+    request = GoogleParty.get("/youtube/v3/videos", query: { part: "liveStreamingDetails", id: ids.join(",") })
+    if request.success?
+      request.parsed_response["items"].each do |data|
+        i = @data.find_index { |v| v["id"]["videoId"] == data["id"] }
+        @data[i]["liveStreamingDetails"] = data["liveStreamingDetails"]
+      end
+    end
+  end
+
   content_type :atom
   erb :youtube_feed
 end

config/initializers/05-string.rb

@@ -13,6 +13,10 @@ def ustrip
   end
 
   def numeric?
-     self =~ /^\d+$/
+    /^\d+$/ === self
+  end
+
+  def tz_offset?
+    /^[-+]?\d+(\.\d+)?$/ === self
   end
 end

config/initializers/05-time.rb

@@ -1,6 +1,20 @@
 class Time
   # always output time objects in RFC3339 format
   def to_s
-    self.utc.strftime('%FT%TZ')
+    self.utc.strftime("%FT%TZ")
+  end
+
+  def readable(tz=nil)
+    t = self
+    if tz
+      if ActiveSupport::TimeZone::MAPPING.flatten.include?(tz)
+        t = t.in_time_zone(tz)
+      elsif tz.tz_offset?
+        # to get this offset from JavaScript, use: -new Date().getTimezoneOffset()/60
+        # available offsets: ActiveSupport::TimeZone.all.map { |z| z.utc_offset/60/60.0 }.uniq
+        t = t.in_time_zone(tz.to_f) rescue t
+      end
+    end
+    t.strftime("%F %T %z")
   end
 end

views/index.erb

@@ -83,6 +83,9 @@ $(document).ready(function() {
     form = $(this).parents("form");
     val = $(this).attr("data-submit-type");
     $('<input type="hidden" name="type">').val(val).insertAfter(this);
+    if (form.attr("action") == "youtube") {
+      $('<input type="hidden" name="tz">').val(-new Date().getTimezoneOffset()/60).insertAfter(this);
+    }
     form.find("[type=submit]").click();
   });
   $("[data-download]").click(function() {

views/youtube_feed.erb

@@ -4,20 +4,28 @@
   <title><%= @username %> on YouTube</title>
   <icon>https://s.ytimg.com/yts/img/favicon_48-vfl1s0rGh.png</icon>
   <link href="<%= request.original_url %>" rel="self" />
-  <link href="https://youtube.com/channel/<%= @channel_id %>" rel="alternate" />
+  <link href="https://www.youtube.com/channel/<%= @channel_id %>" rel="alternate" />
   <updated><%= @data[0]["snippet"]["publishedAt"] if @data[0] %></updated>
 <%- @data.each do |video| -%>
 
   <entry>
     <id>youtube:video:<%= video["id"]["videoId"] %><%= ":#{params[:cachebuster]}" if params[:cachebuster] %></id>
     <title><%= video["snippet"]["title"].to_line.esc %></title>
-    <link href="https://youtube.com/watch?v=<%= video["id"]["videoId"] %>" />
+    <link href="https://www.youtube.com/watch?v=<%= video["id"]["videoId"] %>" />
     <updated><%= video["snippet"]["publishedAt"] %></updated>
     <author><name><%= @username %></name></author>
     <content type="html">
 <%= <<-EOF.esc
 <iframe width="640" height="360" src="https://www.youtube.com/embed/#{video["id"]["videoId"]}?rel=0" frameborder="0" scrolling="no" allowfullscreen></iframe>
-
+#{
+if video["liveStreamingDetails"]
+  if video["liveStreamingDetails"]["actualStartTime"]
+    "<p>Live broadcast started at: #{Time.parse(video["liveStreamingDetails"]["actualStartTime"]).readable(@tz)}.</p>"
+  elsif video["liveStreamingDetails"]["scheduledStartTime"]
+    "<p>Live broadcast scheduled to start at: #{Time.parse(video["liveStreamingDetails"]["scheduledStartTime"]).readable(@tz)}.</p>"
+  end
+end
+}
 <p>#{video["snippet"]["description"].gsub("\n","<br>\n")}</p>
 EOF
 -%>