Link to inyourtime.zone in all the sensible places

app/helpers/application_helper.rb

@@ -180,9 +180,10 @@ module ApplicationHelper
 
   # TODO:Snap!Con: Replace this with a search for a conference logo.
   def nav_root_link_for(conference)
+    path = conference.present? ? conference_path(conference) : root_path
     link_to(
       image_tag('snapcon_logo.png'),
-      root_path,
+      path,
       class: 'navbar-brand',
       title: nav_link_text(conference)
     )
@@ -208,4 +209,15 @@ module ApplicationHelper
       object.picture.large.url
     end
   end
+
+  # Embed links with a localized timezone URL
+  # Timestamps are stored at UTC but in the real timezone.
+  # We must convert then shift the time back to get the correct value.
+  def inyourtz(time, timezone = 'GMT', &block)
+    time = time.in_time_zone(timezone)
+    time -= time.utc_offset
+    link_to "https://inyourtime.zone/t?#{time.to_i}", target: '_blank' do
+      block.call
+    end
+  end
 end

app/views/proposals/show.html.haml

@@ -76,7 +76,9 @@
         %dl#proposal-info
           .col-md-12
             %dt Date:
-            %dd= @event_schedule.start_time.strftime("%Y %B %e - %H:%M") if @event_schedule
+            %dd
+              = inyourtz(@event_schedule.start_time, @conference.timezone) do
+                = @event_schedule.start_time.strftime("%Y %B %e - %H:%M") if @event_schedule
           .col-md-12
             %dt Duration:
             %dd= show_time(@event.event_type.length)
@@ -121,7 +123,9 @@
                   %dl
                     %dt Start Time:
                     %dd
-                      = event.program.selected_event_schedules.find { |es| es.event == event }.start_time.strftime("%Y %B %e %H:%M")
+                      - event_schedule = event.program.selected_event_schedules.find { |es| es.event == event }
+                      = inyourtz(event_schedule.start_time, @conference.timezone) do
+                        = event_schedule.start_time.strftime("%Y %B %e %H:%M")
                     %br
                       %dt Room:
                       %dd

app/views/schedules/_event.html.haml

@@ -24,12 +24,13 @@
       -# TODO: More informative text or aria-label.
       = link_to 'more', conference_program_proposal_path(@conference.short_title, event.id) if event.abstract.length > 400
     - if event_schedule.present?
-      %span.track
-        %span.fa.fa-clock-o
-        %span.label{ style: "background-color: grey" }
-          = event_schedule.start_time.strftime('%H:%M')
-          \-
-          = event_schedule.end_time.strftime('%H:%M')
+      = inyourtz(event_schedule.start_time, @conference.timezone) do
+        %span.track
+          %span.fa.fa-clock-o
+          %span.label{ style: "background-color: grey" }
+            = event_schedule.start_time.strftime('%H:%M')
+            \-
+            = event_schedule.end_time.strftime('%H:%M')
       %span.track
         %span.fa.fa-map-marker
         %span.label{ style: "background-color: grey" }

app/views/schedules/events.html.haml

@@ -27,13 +27,15 @@
         .col-xs-12.col-md-12
           .date-content
             %span{ class: 'date-title', id: "#{ event_schedule.start_time.strftime('%Y-%m-%d') }" }
-              = date = event_schedule.start_time.strftime('%Y-%m-%d')
+              = inyourtz(event_schedule.start_time, @conference.timezone) do
+                = date = event_schedule.start_time.strftime('%Y-%m-%d')
             %a{ title: "Go up", class: "pull-right", href: "#program" }
               %i{ class: "fa fa-angle-double-up fa-lg", 'aria-hidden' => true }
       - unless event_schedule.start_time.strftime('%H:%M').eql?(time)
         .col-xs-12.col-md-1
           .start-time
-            = time = event_schedule.start_time.strftime('%H:%M')
+            = inyourtz(event_schedule.start_time, @conference.timezone) do
+              = time = event_schedule.start_time.strftime('%H:%M')
         .col-xs-12.col-md-11
           .new-time-event
             = render partial: 'event', locals: { event: event_schedule.event, event_schedule: event_schedule }