DEV: uses Discourse.redis instead of $redis

app/controllers/public_controller.rb

@@ -7,7 +7,7 @@ class DiscourseChat::PublicController < ApplicationController
     params.require(:secret)
 
     redis_key = "chat_integration:transcript:#{params[:secret]}"
-    content = $redis.get(redis_key)
+    content = Discourse.redis.get(redis_key)
 
     if content
       render json: { content: content }

app/helpers/helper.rb

@@ -192,7 +192,7 @@ module DiscourseChat
     def self.save_transcript(transcript)
       secret = SecureRandom.hex
       redis_key = "chat_integration:transcript:#{secret}"
-      $redis.setex(redis_key, 3600, transcript)
+      Discourse.redis.setex(redis_key, 3600, transcript)
       secret
     end
 

spec/helpers/helper_spec.rb

@@ -311,13 +311,13 @@ RSpec.describe DiscourseChat::Manager do
     it 'saves a transcript to redis' do
       key = DiscourseChat::Helper.save_transcript("Some content here")
 
-      expect($redis.get("chat_integration:transcript:#{key}")).to eq("Some content here")
+      expect(Discourse.redis.get("chat_integration:transcript:#{key}")).to eq("Some content here")
 
-      ttl = $redis.pttl("chat_integration:transcript:#{key}")
+      ttl = Discourse.redis.pttl("chat_integration:transcript:#{key}")
 
       # Slight hack since freeze_time doens't work on redis
-      expect($redis.pttl("chat_integration:transcript:#{key}")).to be <= (3601 * 1000)
-      expect($redis.pttl("chat_integration:transcript:#{key}")).to be >= (3599 * 1000)
+      expect(Discourse.redis.pttl("chat_integration:transcript:#{key}")).to be <= (3601 * 1000)
+      expect(Discourse.redis.pttl("chat_integration:transcript:#{key}")).to be >= (3599 * 1000)
     end
   end