From 4f1d8636154d8f445eadec5ce3906f06324b0176 Mon Sep 17 00:00:00 2001
From: Eugen Rochko <eugen@zeonfederated.com>
Date: Thu, 24 Nov 2016 18:17:58 +0100
Subject: [PATCH] Only distribute statuses to followers who signed in in the
 last 2 weeks, add rake task for clearing feeds of inactive users

---
 app/services/fan_out_on_write_service.rb |  2 +-
 config/environments/production.rb        |  3 ++-
 lib/tasks/mastodon.rake                  | 10 +++++++++-
 3 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/app/services/fan_out_on_write_service.rb b/app/services/fan_out_on_write_service.rb
index 78cb0b13f..78301c6ca 100644
--- a/app/services/fan_out_on_write_service.rb
+++ b/app/services/fan_out_on_write_service.rb
@@ -24,7 +24,7 @@ class FanOutOnWriteService < BaseService
   def deliver_to_followers(status)
     Rails.logger.debug "Delivering status #{status.id} to followers"
 
-    status.account.followers.where(domain: nil).find_each do |follower|
+    status.account.followers.where(domain: nil).joins(:user).where('users.current_sign_in_at > ?', 14.days.ago).find_each do |follower|
       next if FeedManager.instance.filter?(:home, status, follower)
       FeedManager.instance.push(:home, follower, status)
     end
diff --git a/config/environments/production.rb b/config/environments/production.rb
index 7f13fcf6b..dcb659d6c 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -50,7 +50,8 @@ Rails.application.configure do
     host: ENV.fetch('REDIS_HOST') { 'localhost' },
     port: ENV.fetch('REDIS_PORT') { 6379 },
     db: 0,
-    namespace: 'cache'
+    namespace: 'cache',
+    expires_in: 20.minutes
   }
 
   # Enable serving of images, stylesheets, and JavaScripts from an asset server.
diff --git a/lib/tasks/mastodon.rake b/lib/tasks/mastodon.rake
index 58bafff66..93461bd0a 100644
--- a/lib/tasks/mastodon.rake
+++ b/lib/tasks/mastodon.rake
@@ -36,8 +36,16 @@ namespace :mastodon do
   end
 
   namespace :feeds do
-    desc 'Clears all timelines so that they would be regenerated on next hit'
+    desc 'Clear timelines of inactive users'
     task clear: :environment do
+      User.where('current_sign_in_at < ?', 14.days.ago).find_each do |user|
+        Redis.current.del(FeedManager.instance.key(:home, user.account_id))
+        Redis.current.del(FeedManager.instance.key(:mentions, user.account_id))
+      end
+    end
+
+    desc 'Clears all timelines so that they would be regenerated on next hit'
+    task clear_all: :environment do
       Redis.current.keys('feed:*').each { |key| Redis.current.del(key) }
     end
   end