From 2f09415d8897e19130ec2f0eb16a841034f895e9 Mon Sep 17 00:00:00 2001
From: Kyle Drake <kyle@kyledrake.net>
Date: Mon, 18 Apr 2016 22:25:18 -0700
Subject: [PATCH] quick and dirty cache for popular tags result

---
 Gemfile        |  1 +
 Gemfile.lock   |  5 +++++
 environment.rb |  3 +++
 models/tag.rb  | 10 +++++++++-
 4 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/Gemfile b/Gemfile
index 35a420e7..0f11c869 100644
--- a/Gemfile
+++ b/Gemfile
@@ -38,6 +38,7 @@ gem 'will_paginate'
 gem 'simpleidn'
 gem 'gandi'
 gem 'hoe', '3.14.2', require: nil
+gem 'msgpack'
 
 platform :mri, :rbx do
   gem 'magic' # sudo apt-get install file, For OSX: brew install libmagic
diff --git a/Gemfile.lock b/Gemfile.lock
index 34d4e46c..c6597bfb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -101,6 +101,7 @@ GEM
       ruby-progressbar
     mocha (1.1.0)
       metaclass (~> 0.0.1)
+    msgpack (0.7.5)
     multi_json (1.11.2)
     net-scp (1.2.1)
       net-ssh (>= 2.6.5)
@@ -259,6 +260,7 @@ DEPENDENCIES
   minitest
   minitest-reporters
   mocha
+  msgpack
   paypal-recurring
   pg
   poltergeist
@@ -297,3 +299,6 @@ DEPENDENCIES
   webmock
   will_paginate
   zipruby
+
+BUNDLED WITH
+   1.11.2
diff --git a/environment.rb b/environment.rb
index 2314638b..6a3baa04 100644
--- a/environment.rb
+++ b/environment.rb
@@ -62,6 +62,9 @@ Sidekiq.configure_client do |config|
   config.redis = sidekiq_redis_config
 end
 
+$redis = Redis.new
+$redis_cache = Redis::Namespace.new :cache, redis: $redis
+
 # :nocov:
 if ENV['RACK_ENV'] == 'development'
   # Run async jobs immediately in development.
diff --git a/models/tag.rb b/models/tag.rb
index 2ec4cce4..e5c7bdb0 100644
--- a/models/tag.rb
+++ b/models/tag.rb
@@ -23,6 +23,14 @@ class Tag < Sequel::Model
   end
 
   def self.popular_names(limit=10)
-    DB["select tags.name,count(*) as c from sites_tags inner join tags on tags.id=sites_tags.tag_id where tags.name != '' and tags.is_nsfw='f' group by tags.name having count(*) > 1 order by c desc LIMIT ?", limit].all
+    cache = $redis_cache.get :tag_popular_names
+    if cache.nil?
+      res = DB["select tags.name,count(*) as c from sites_tags inner join tags on tags.id=sites_tags.tag_id where tags.name != '' and tags.is_nsfw='f' group by tags.name having count(*) > 1 order by c desc LIMIT ?", limit].all
+      $redis_cache.set :tag_popular_names, res.to_msgpack
+      $redis_cache.expire :tag_popular_names, 86400 # 24 hours
+    else
+      res = MessagePack.unpack cache, symbolize_keys: true
+    end
+    res
   end
 end