1 files changed, 55 insertions, 0 deletions
diff --git a/lib/gitlab/search/query.rb b/lib/gitlab/search/query.rb
new file mode 100644
index 00000000000..8583bce7792
--- /dev/null
+++ b/lib/gitlab/search/query.rb
@@ -0,0 +1,55 @@
+module Gitlab
+  module Search
+    class Query < SimpleDelegator
+      def initialize(query, filter_opts = {}, &block)
+        @raw_query = query.dup
+        @filters = []
+        @filter_options = { default_parser: :downcase.to_proc }.merge(filter_opts)
+
+        self.instance_eval(&block) if block_given?
+
+        @query = Gitlab::Search::ParsedQuery.new(*extract_filters)
+        # set the ParsedQuery as our default delegator thanks to SimpleDelegator
+        super(@query)
+      end
+
+      private
+
+      def filter(name, **attributes)
+        filter = { parser: @filter_options[:default_parser], name: name }.merge(attributes)
+
+        @filters << filter
+      end
+
+      def filter_options(**options)
+        @filter_options.merge!(options)
+      end
+
+      def extract_filters
+        fragments = []
+
+        filters = @filters.each_with_object([]) do |filter, parsed_filters|
+          match = @raw_query.split.find { |part| part =~ /\A#{filter[:name]}:/ }
+          next unless match
+
+          input = match.split(':')[1..-1].join
+          next if input.empty?
+
+          filter[:value] = parse_filter(filter, input)
+          filter[:regex_value] = Regexp.escape(filter[:value]).gsub('\*', '.*?')
+          fragments << match
+
+          parsed_filters << filter
+        end
+
+        query = (@raw_query.split - fragments).join(' ')
+
+        [query, filters]
+      end
+
+      def parse_filter(filter, input)
+        filter[:parser].call(input)
+      end
+    end
+  end
+end