From 0a2cca3ee47684896c0718bed18b4f2552e226a0 Mon Sep 17 00:00:00 2001
From: Adam Gastineau <adam@appcannonsoftware.com>
Date: Sat, 5 Dec 2020 18:54:38 -0800
Subject: [PATCH] Allow disabling Redis usage, for debugging and single user
 instances

---
 app.js             | 34 +++++++++++++++++++++++-----------
 config.js.template |  1 +
 2 files changed, 24 insertions(+), 11 deletions(-)

diff --git a/app.js b/app.js
index 15911c6..899f1aa 100644
--- a/app.js
+++ b/app.js
@@ -11,20 +11,32 @@ const express = require('express')
 const cookieParser = require('cookie-parser')
 const r = require('redis')
 
-const redisOptions = {
-  host: '127.0.0.1',
-  port: 6379
-}
 
-if (config.redis_host) {
-  redisOptions.host = config.redis_host
-}
+const redis = (() => {
+  if (!config.redis_enabled) {
+    // Stub Redis if disabled
+    return {
+      get: (_, callback) => callback(null, null),
+      setex: (_, _1, _2, callback) => callback(null),
+      on: () => {}
+    }
+  }
 
-if (config.redis_port && config.redis_port > 0) {
-  redisOptions.port = config.redis_port
-}
+  const redisOptions = {
+    host: '127.0.0.1',
+    port: 6379
+  }
+  
+  if (config.redis_host) {
+    redisOptions.host = config.redis_host
+  }
+  
+  if (config.redis_port && config.redis_port > 0) {
+    redisOptions.port = config.redis_port
+  }  
 
-const redis = r.createClient(redisOptions)
+  return r.createClient(redisOptions)
+})()
 const helmet = require('helmet')
 const bodyParser = require('body-parser')
 const fetch = require('node-fetch')
diff --git a/config.js.template b/config.js.template
index b034e4a..4c0e8df 100644
--- a/config.js.template
+++ b/config.js.template
@@ -3,6 +3,7 @@ const config = {
   reddit_app_id: 'H6-HjZ5pUPjaFQ', // You should obtain your own Reddit app ID. For testing purposes it's okay to use this project's default app ID. Create your Reddit app here: https://old.reddit.com/prefs/apps/. Make sure to create an "installed app" type of app.
   cert_dir: '', // For example '/home/teddit/letsencrypt/live/teddit.net', if you are using https. No trailing slash.
   video_enabled: true,
+  redis_enabled: true, // If disabled, does not cache Reddit API calls
   redis_host: '127.0.0.1',
   redis_port: 6379,
   ssl_port: 8088,