Add better capacity for live lectures

app/controllers/lecture_controller.rb

@@ -19,6 +19,10 @@ class LectureController < ApplicationController
       project_id: lecture.course.toggl_project,
     )
 
+    if lecture.is_live?
+      redirect_to lecture.live_video_url, allow_other_host: true
+    end
+
     if lecture.recording.present?
       redirect_to lecture.recording.recording_url, allow_other_host: true
     end

app/models/lecture.rb

@@ -38,4 +38,13 @@ class Lecture < ApplicationRecord
   def live_video_url
     nil
   end
+
+  # NAIVE: Assumes that lectures are 50 minutes long, this is true currently but not assured.
+  def end_time
+    start_time + 50.hour
+  end
+
+  def is_live?
+    live_video_url.present? && start_time.past? && end_time.future?
+  end
 end

app/views/lectures/_lecture.html.erb

@@ -60,7 +60,8 @@
                     class: 'action-button'
       %>
     <% elsif lecture.start_time.past? && !lecture.attended? %>
-      <%= button_to "Start",
+      <% start_label = if lecture.is_live? then "Join" else "Start" end %>
+      <%= button_to start_label,
                     lectures_start_path(id: lecture.id),
                     class: 'action-button'
       %>