Added following page to see posts from yourself and people you follow

lib/mixer/posts.ex

@@ -8,6 +8,7 @@ defmodule Mixer.Posts do
       rpc_action :create_tweet, :create
       rpc_action :like_tweet, :like
       rpc_action :read_tweet, :read
+      rpc_action :read_following_feed, :following_feed
       rpc_action :unlike_tweet, :unlike
       rpc_action :update_tweet, :update
       rpc_action :destroy_tweet, :destroy

lib/mixer/posts/tweet.ex

@@ -30,6 +30,13 @@ defmodule Mixer.Posts.Tweet do
   actions do
     defaults [:read, :destroy]
 
+    read :following_feed do
+      filter expr(
+               user_id == ^actor(:id) or
+                 exists(user.followers, follower_id == ^actor(:id))
+             )
+    end
+
     create :create do
       upsert? true
       accept [:content]