1 files changed, 44 insertions, 0 deletions
diff --git a/app/finders/autocomplete/acts_as_taggable_on/tags_finder.rb b/app/finders/autocomplete/acts_as_taggable_on/tags_finder.rb
new file mode 100644
index 00000000000..f38c187799c
--- /dev/null
+++ b/app/finders/autocomplete/acts_as_taggable_on/tags_finder.rb
@@ -0,0 +1,44 @@
+# frozen_string_literal: true
+
+module Autocomplete
+  module ActsAsTaggableOn
+    class TagsFinder
+      LIMIT = 20
+
+      def initialize(params:)
+        @params = params
+      end
+
+      def execute
+        tags = all_tags
+        tags = filter_by_name(tags)
+        limit(tags)
+      end
+
+      private
+
+      def all_tags
+        ::ActsAsTaggableOn::Tag.all
+      end
+
+      def filter_by_name(tags)
+        return tags unless search
+        return tags.none if search.empty?
+
+        if search.length >= Gitlab::SQL::Pattern::MIN_CHARS_FOR_PARTIAL_MATCHING
+          tags.named_like(search)
+        else
+          tags.named(search)
+        end
+      end
+
+      def limit(tags)
+        tags.limit(LIMIT) # rubocop: disable CodeReuse/ActiveRecord
+      end
+
+      def search
+        @params[:search]
+      end
+    end
+  end
+end