1 files changed, 57 insertions, 0 deletions
diff --git a/lib/gitlab/ci/build/duration_parser.rb b/lib/gitlab/ci/build/duration_parser.rb
new file mode 100644
index 00000000000..9385dccd5f3
--- /dev/null
+++ b/lib/gitlab/ci/build/duration_parser.rb
@@ -0,0 +1,57 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Ci
+    module Build
+      class DurationParser
+        def self.validate_duration(value)
+          new(value).validate_duration
+        end
+
+        def initialize(value)
+          @value = value
+        end
+
+        def validate_duration
+          return true if never?
+
+          cached_parse
+        end
+
+        def seconds_from_now
+          parse&.seconds&.from_now
+        end
+
+        private
+
+        attr_reader :value
+
+        def cached_parse
+          return validation_cache[value] if validation_cache.key?(value)
+
+          validation_cache[value] = safe_parse
+        end
+
+        def safe_parse
+          parse
+        rescue ChronicDuration::DurationParseError
+          false
+        end
+
+        def parse
+          return if never?
+
+          ChronicDuration.parse(value)
+        end
+
+        def validation_cache
+          Gitlab::SafeRequestStore[:ci_expire_in_parser_cache] ||= {}
+        end
+
+        def never?
+          value.to_s.casecmp('never') == 0
+        end
+      end
+    end
+  end
+end