Feature: Add online status to each user (#452)

* Feature: Add online status to each user * Add OnlineStatusable, add availability status to thumbnail
2020-02-02 22:34:16 +05:30
parent 1f4703d25d
commit 0b31e14132
14 changed files with 106 additions and 14 deletions
--- a/lib/online_status_tracker.rb
+++ b/lib/online_status_tracker.rb
@@ -0,0 +1,19 @@
+module OnlineStatusTracker
+  def self.add_subscription(channel_id)
+    count = subscription_count(channel_id)
+    ::Redis::Alfred.setex(channel_id, count + 1)
+  end
+
+  def self.remove_subscription(channel_id)
+    count = subscription_count(channel_id)
+    if count == 1
+      ::Redis::Alfred.delete(channel_id)
+    elsif count != 0
+      ::Redis::Alfred.setex(channel_id, count - 1)
+    end
+  end
+
+  def self.subscription_count(channel_id)
+    ::Redis::Alfred.get(channel_id).to_i
+  end
+end