FIX: Set a not expiring key for user enabled readonly mode.

app/controllers/admin/backups_controller.rb

@@ -95,7 +95,7 @@ class Admin::BackupsController < Admin::AdminController
 
   def readonly
     enable = params.fetch(:enable).to_s == "true"
-    enable ? Discourse.enable_readonly_mode : Discourse.disable_readonly_mode
+    enable ? Discourse.enable_readonly_mode(user_enabled: true) : Discourse.disable_readonly_mode(user_enabled: true)
     render nothing: true
   end
 

lib/discourse.rb

@@ -216,11 +216,18 @@ module Discourse
   end
 
   READONLY_MODE_KEY_TTL ||= 60
+  READONLY_MODE_KEY ||= 'readonly_mode'.freeze
+  USER_READONLY_MODE_KEY ||= 'readonly_mode:user'.freeze
 
-  def self.enable_readonly_mode
-    $redis.setex(readonly_mode_key, READONLY_MODE_KEY_TTL, 1)
-    MessageBus.publish(readonly_channel, true)
+  def self.enable_readonly_mode(user_enabled: false)
+    if user_enabled
+      $redis.set(USER_READONLY_MODE_KEY, 1)
+    else
+      $redis.setex(READONLY_MODE_KEY, READONLY_MODE_KEY_TTL, 1)
       keep_readonly_mode
+    end
+
+    MessageBus.publish(readonly_channel, true)
     true
   end
 
@@ -228,20 +235,21 @@ module Discourse
     # extend the expiry by 1 minute every 30 seconds
     Thread.new do
       while readonly_mode?
-        $redis.expire(readonly_mode_key, READONLY_MODE_KEY_TTL)
+        $redis.expire(READONLY_MODE_KEY, READONLY_MODE_KEY_TTL)
         sleep 30.seconds
       end
     end
   end
 
-  def self.disable_readonly_mode
-    $redis.del(readonly_mode_key)
+  def self.disable_readonly_mode(user_enabled: false)
+    key = user_enabled ? USER_READONLY_MODE_KEY : READONLY_MODE_KEY
+    $redis.del(key)
     MessageBus.publish(readonly_channel, false)
     true
   end
 
   def self.readonly_mode?
-    recently_readonly? || !!$redis.get(readonly_mode_key)
+    recently_readonly? || !!$redis.get(READONLY_MODE_KEY)
   end
 
   def self.request_refresh!
@@ -310,10 +318,6 @@ module Discourse
     Rails.configuration.action_controller.asset_host
   end
 
-  def self.readonly_mode_key
-    "readonly_mode"
-  end
-
   def self.readonly_channel
     "/site/read-only"
   end

spec/components/discourse_spec.rb

@@ -86,36 +86,45 @@ describe Discourse do
   end
 
   context 'readonly mode' do
-    let(:readonly_channel) { Discourse.readonly_channel }
-    let(:readonly_key) { Discourse.readonly_mode_key }
+    let(:readonly_mode_key) { Discourse::READONLY_MODE_KEY }
     let(:readonly_mode_ttl) { Discourse::READONLY_MODE_KEY_TTL }
+    let(:user_readonly_mode_key) { Discourse::USER_READONLY_MODE_KEY }
 
     after do
-      $redis.del(readonly_key)
+      $redis.del(readonly_mode_key)
+      $redis.del(user_readonly_mode_key)
     end
 
-    def assert_readonly_mode(message, channel, key, ttl)
-      expect(message.channel).to eq(channel)
+    def assert_readonly_mode(message, key, ttl = -1)
+      expect(message.channel).to eq(Discourse.readonly_channel)
       expect(message.data).to eq(true)
       expect($redis.get(key)).to eq("1")
       expect($redis.ttl(key)).to eq(ttl)
     end
 
-    def assert_readonly_mode_disabled(message, channel, key)
-      expect(message.channel).to eq(channel)
+    def assert_readonly_mode_disabled(message, key)
+      expect(message.channel).to eq(Discourse.readonly_channel)
       expect(message.data).to eq(false)
       expect($redis.get(key)).to eq(nil)
     end
 
-    context ".enable_readonly_mode" do
+    describe ".enable_readonly_mode" do
       it "adds a key in redis and publish a message through the message bus" do
-        expect($redis.get(readonly_key)).to eq(nil)
+        expect($redis.get(readonly_mode_key)).to eq(nil)
         message = MessageBus.track_publish { Discourse.enable_readonly_mode }.first
-        assert_readonly_mode(message, readonly_channel, readonly_key, readonly_mode_ttl)
+        assert_readonly_mode(message, readonly_mode_key, readonly_mode_ttl)
+      end
+
+      context 'user enabled readonly mode' do
+        it "adds a key in redis and publish a message through the message bus" do
+          expect($redis.get(user_readonly_mode_key)).to eq(nil)
+          message = MessageBus.track_publish { Discourse.enable_readonly_mode(user_enabled: true) }.first
+          assert_readonly_mode(message, user_readonly_mode_key)
+        end
       end
     end
 
-    context ".disable_readonly_mode" do
+    describe ".disable_readonly_mode" do
       it "removes a key from redis and publish a message through the message bus" do
         Discourse.enable_readonly_mode
 
@@ -123,17 +132,25 @@ describe Discourse do
           Discourse.disable_readonly_mode
         end.first
 
-        assert_readonly_mode_disabled(message, readonly_channel, readonly_key)
+        assert_readonly_mode_disabled(message, readonly_mode_key)
+      end
+
+      context 'user disabled readonly mode' do
+        it "removes readonly key in redis and publish a message through the message bus" do
+          Discourse.enable_readonly_mode(user_enabled: true)
+          message = MessageBus.track_publish { Discourse.disable_readonly_mode(user_enabled: true) }.first
+          assert_readonly_mode_disabled(message, user_readonly_mode_key)
+        end
       end
     end
 
-    context ".readonly_mode?" do
+    describe ".readonly_mode?" do
       it "is false by default" do
         expect(Discourse.readonly_mode?).to eq(false)
       end
 
       it "returns true when the key is present in redis" do
-        $redis.set(readonly_key, 1)
+        $redis.set(readonly_mode_key, 1)
         expect(Discourse.readonly_mode?).to eq(true)
       end
 
@@ -143,7 +160,7 @@ describe Discourse do
       end
     end
 
-    context ".received_readonly!" do
+    describe ".received_readonly!" do
       it "sets the right time" do
         time = Discourse.received_readonly!
         expect(Discourse.last_read_only['default']).to eq(time)