From 84e32a3b695b2e54ff7733ca660bd95332b21d38 Mon Sep 17 00:00:00 2001
From: Zahary Karadjov <zahary@gmail.com>
Date: Tue, 28 Jun 2022 16:47:59 +0300
Subject: [PATCH] Add high and low operators for Duration and Moment; Add
 Moment.epochSeconds and Moment.epochNanoSeconds

---
 chronos/timer.nim  | 18 ++++++++++++++++++
 tests/testtime.nim |  5 +++++
 2 files changed, 23 insertions(+)

diff --git a/chronos/timer.nim b/chronos/timer.nim
index c458423..477a7d4 100644
--- a/chronos/timer.nim
+++ b/chronos/timer.nim
@@ -302,6 +302,18 @@ const
   ZeroDuration* = Duration(value: 0'i64)
   InfiniteDuration* = Duration(value: high(int64))
 
+template high*(T: typedesc[Moment]): Moment =
+  Moment(value: high(int64))
+
+template low*(T: typedesc[Moment]): Moment =
+  Moment(value: 0)
+
+template high*(T: typedesc[Duration]): Duration =
+  Duration(value: high(int64))
+
+template low*(T: typedesc[Duration]): Duration =
+  Duration(value: 0)
+
 func nanoseconds*(v: SomeIntegerI64): Duration {.inline.} =
   ## Initialize Duration with nanoseconds value ``v``.
   result.value = int64(v)
@@ -438,6 +450,12 @@ func init*(t: typedesc[Moment], value: int64, precision: Duration): Moment =
   ## ``precision``.
   result.value = value * precision.value
 
+func epochSeconds*(moment: Moment): int64 =
+  moment.value div Second.value
+
+func epochNanoSeconds*(moment: Moment): int64 =
+  moment.value
+
 proc fromNow*(t: typedesc[Moment], a: Duration): Moment {.inline.} =
   ## Returns moment in time which is equal to current moment + Duration.
   result = Moment.now() + a
diff --git a/tests/testtime.nim b/tests/testtime.nim
index 8a1f84d..a66d129 100644
--- a/tests/testtime.nim
+++ b/tests/testtime.nim
@@ -11,6 +11,11 @@ import ../chronos, ../chronos/timer
 
 when defined(nimHasUsed): {.used.}
 
+static:
+  doAssert Moment.high - Moment.low == Duration.high
+  doAssert Moment.low.epochSeconds == 0
+  doAssert Moment.low.epochNanoSeconds == 0
+
 suite "Asynchronous timers & steps test suite":
   const TimersCount = 10