Add latest changes from gitlab-org/gitlab@master

1 files changed, 60 insertions, 0 deletions

diff --git a/lib/gitlab/search/recent_issues.rb b/lib/gitlab/search/recent_issues.rb
new file mode 100644
index 00000000000..755ca35bd66
--- /dev/null
+++ b/lib/gitlab/search/recent_issues.rb
@@ -0,0 +1,60 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Search
+    class RecentIssues
+      ITEMS_LIMIT = 100
+      EXPIRES_AFTER = 7.days
+
+      def initialize(user:, items_limit: ITEMS_LIMIT, expires_after: EXPIRES_AFTER)
+        @user = user
+        @items_limit = items_limit
+        @expires_after = expires_after
+      end
+
+      def log_view(issue)
+        return unless recent_items_enabled?
+
+        with_redis do |redis|
+          redis.zadd(key, Time.now.to_f, issue.id)
+          redis.expire(key, @expires_after)
+
+          # There is a race condition here where we could end up removing an
+          # item from 2 places concurrently but this is fine since worst case
+          # scenario we remove an extra item from the end of the list.
+          if redis.zcard(key) > @items_limit
+            redis.zremrangebyrank(key, 0, 0) # Remove least recent
+          end
+        end
+      end
+
+      def search(term)
+        return Issue.none unless recent_items_enabled?
+
+        ids = with_redis do |redis|
+          redis.zrevrange(key, 0, @items_limit - 1)
+        end.map(&:to_i)
+
+        IssuesFinder.new(@user, search: term, in: 'title').execute.reorder(nil).id_in_ordered(ids) # rubocop: disable CodeReuse/ActiveRecord
+      end
+
+      private
+
+      def with_redis(&blk)
+        Gitlab::Redis::SharedState.with(&blk) # rubocop: disable CodeReuse/ActiveRecord
+      end
+
+      def key
+        "recent_items:#{type.name.downcase}:#{@user.id}"
+      end
+
+      def type
+        Issue
+      end
+
+      def recent_items_enabled?
+        Feature.enabled?(:recent_items_search, @user)
+      end
+    end
+  end
+end