AK: Add AK::Time factory method to construct from individual time fields

1 files changed, 18 insertions, 0 deletions

diff --git a/AK/Time.h b/AK/Time.h
index df4f5b3045..f1a3f28b1d 100644
--- a/AK/Time.h
+++ b/AK/Time.h
@@ -136,6 +136,24 @@ private:
     }
 
 public:
+    [[nodiscard]] constexpr static Time from_timestamp(u16 year, u8 month, u8 day, u8 hour, u8 minute, u8 second, u8 millisecond)
+    {
+        constexpr auto milliseconds_per_day = 86'400'000;
+        constexpr auto milliseconds_per_hour = 3'600'000;
+        constexpr auto milliseconds_per_minute = 60'000;
+        constexpr auto milliseconds_per_second = 1'000;
+
+        i64 milliseconds_since_epoch = days_since_epoch(year, month, day);
+        milliseconds_since_epoch *= milliseconds_per_day;
+
+        milliseconds_since_epoch += hour * milliseconds_per_hour;
+        milliseconds_since_epoch += minute * milliseconds_per_minute;
+        milliseconds_since_epoch += second * milliseconds_per_second;
+        milliseconds_since_epoch += millisecond;
+
+        return from_milliseconds(milliseconds_since_epoch);
+    }
+
     [[nodiscard]] constexpr static Time from_seconds(i64 seconds) { return Time(seconds, 0); }
     [[nodiscard]] constexpr static Time from_nanoseconds(i64 nanoseconds)
     {