From f65eaa5aae8a71431bdcfb9c49c869cbdbc4da3f Mon Sep 17 00:00:00 2001
From: Claire <claire.github-309c@sitedethib.com>
Date: Fri, 25 Mar 2022 21:00:59 +0100
Subject: [PATCH] Add admin dashboard checks for Elasticsearch version (#17863)

---
 app/lib/admin/system_check.rb                 |  1 +
 .../admin/system_check/elasticsearch_check.rb | 39 +++++++++++++++++++
 config/locales/en.yml                         |  5 +++
 3 files changed, 45 insertions(+)
 create mode 100644 app/lib/admin/system_check/elasticsearch_check.rb

diff --git a/app/lib/admin/system_check.rb b/app/lib/admin/system_check.rb
index afb20cb477..877a42ef63 100644
--- a/app/lib/admin/system_check.rb
+++ b/app/lib/admin/system_check.rb
@@ -5,6 +5,7 @@ class Admin::SystemCheck
     Admin::SystemCheck::DatabaseSchemaCheck,
     Admin::SystemCheck::SidekiqProcessCheck,
     Admin::SystemCheck::RulesCheck,
+    Admin::SystemCheck::ElasticsearchCheck,
   ].freeze
 
   def self.perform
diff --git a/app/lib/admin/system_check/elasticsearch_check.rb b/app/lib/admin/system_check/elasticsearch_check.rb
new file mode 100644
index 0000000000..1b48a5415a
--- /dev/null
+++ b/app/lib/admin/system_check/elasticsearch_check.rb
@@ -0,0 +1,39 @@
+# frozen_string_literal: true
+
+class Admin::SystemCheck::ElasticsearchCheck < Admin::SystemCheck::BaseCheck
+  def pass?
+    return true unless Chewy.enabled?
+
+    running_version.present? && compatible_version?
+  end
+
+  def message
+    if running_version.present?
+      Admin::SystemCheck::Message.new(:elasticsearch_version_check, I18n.t('admin.system_checks.elasticsearch_version_check.version_comparison', running_version: running_version, required_version: required_version))
+    else
+      Admin::SystemCheck::Message.new(:elasticsearch_running_check)
+    end
+  end
+
+  private
+
+  def running_version
+    @running_version ||= begin
+      Chewy.client.info['version']['number']
+    rescue Faraday::ConnectionFailed
+      nil
+    end
+  end
+
+  def required_version
+    '7.x'
+  end
+
+  def compatible_version?
+    Gem::Version.new(running_version) >= Gem::Version.new(required_version)
+  end
+
+  def missing_queues
+    @missing_queues ||= Sidekiq::ProcessSet.new.reduce(SIDEKIQ_QUEUES) { |queues, process| queues - process['queues'] }
+  end
+end
diff --git a/config/locales/en.yml b/config/locales/en.yml
index a6ded38f72..db29922fa9 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -780,6 +780,11 @@ en:
         message_html: You haven't defined any server rules.
       sidekiq_process_check:
         message_html: No Sidekiq process running for the %{value} queue(s). Please review your Sidekiq configuration
+      elasticsearch_running_check:
+        message_html: Could not connect to Elasticsearch. Please check that it is running, or disable full-text search
+      elasticsearch_version_check:
+        message_html: "Incompatible Elasticsearch version: %{value}"
+        version_comparison: "Elasticsearch %{running_version} is running while %{required_version} is required"
     tags:
       review: Review status
       updated_msg: Hashtag settings updated successfully