From afb37746466e8a2b1a856a0e8319b753a6c86c0d Mon Sep 17 00:00:00 2001
From: "Alexander \"Arav\" Andreev" <me@arav.top>
Date: Sun, 5 Feb 2023 04:41:52 +0400
Subject: [PATCH] Added ToClientTimezone() util func.

---
 pkg/util/util.go | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 pkg/util/util.go

diff --git a/pkg/util/util.go b/pkg/util/util.go
new file mode 100644
index 0000000..16df29f
--- /dev/null
+++ b/pkg/util/util.go
@@ -0,0 +1,21 @@
+package util
+
+import (
+	"net/http"
+	"time"
+)
+
+// ToClientTimezone converts given time to timezone set in a
+// X-Client-Timezone header. If this header is not set, then
+// converts to UTC.
+func ToClientTimezone(t time.Time, r *http.Request) time.Time {
+	if tz := r.Header.Get("X-Client-Timezone"); tz != "" {
+		loc, err := time.LoadLocation(tz)
+		if err != nil {
+			return t.UTC()
+		}
+		return t.In(loc)
+	}
+
+	return t.UTC()
+}