adds time functions from unix micros/millis

util.go

@@ -69,3 +69,23 @@ func CopyFile(src, dst string) (err error) {
 	err = out.Sync()
 	return
 }
+
+func TimeFromUnixMilli(ms int64) time.Time {
+	const millisInSecond = 1000
+	const nsInSecond = 1000000
+	return time.Unix(ms/int64(millisInSecond), (ms%int64(millisInSecond))*int64(nsInSecond))
+}
+
+func TimeFromUnixMicro(ms int64) time.Time {
+	const microInSecond = 1000000
+	const nsInSecond = 1000000
+	return time.Unix(ms/int64(microInSecond), (ms%int64(microInSecond))*int64(nsInSecond))
+}
+
+func TimeFromWebKit(input int64) time.Time {
+	// webkit time is stupid and uses 1601-01-01 for epoch
+	// it's 11644473600 seconds behind unix 1970-01-01 epoch
+	// it's also in microseconds
+	unixMicrosCorrected := input - (11644473600 * 1000000)
+	return TimeFromUnixMicro(unixMicrosCorrected)
+}