From d0ed7890df949669261f52235151c93cf324714e Mon Sep 17 00:00:00 2001
From: Andrew Dolgov <noreply@fakecake.org>
Date: Wed, 23 Sep 2020 13:05:00 +0300
Subject: prev: add missing class

---
 classes/timehelper.php | 88 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 classes/timehelper.php

(limited to 'classes/timehelper.php')

diff --git a/classes/timehelper.php b/classes/timehelper.php
new file mode 100644
index 000000000..ce9e35f3e
--- /dev/null
+++ b/classes/timehelper.php
@@ -0,0 +1,88 @@
+<?php
+class TimeHelper {
+
+	static function smart_date_time($timestamp, $tz_offset = 0, $owner_uid = false, $eta_min = false) {
+		if (!$owner_uid) $owner_uid = $_SESSION['uid'];
+
+		if ($eta_min && time() + $tz_offset - $timestamp < 3600) {
+			return T_sprintf("%d min", date("i", time() + $tz_offset - $timestamp));
+		} else if (date("Y.m.d", $timestamp) == date("Y.m.d", time() + $tz_offset)) {
+			$format = get_pref('SHORT_DATE_FORMAT', $owner_uid);
+			if (strpos((strtolower($format)), "a") === false)
+				return date("G:i", $timestamp);
+			else
+				return date("g:i a", $timestamp);
+		} else if (date("Y", $timestamp) == date("Y", time() + $tz_offset)) {
+			$format = get_pref('SHORT_DATE_FORMAT', $owner_uid);
+			return date($format, $timestamp);
+		} else {
+			$format = get_pref('LONG_DATE_FORMAT', $owner_uid);
+			return date($format, $timestamp);
+		}
+	}
+
+	static function make_local_datetime($timestamp, $long, $owner_uid = false,
+					$no_smart_dt = false, $eta_min = false) {
+
+		if (!$owner_uid) $owner_uid = $_SESSION['uid'];
+		if (!$timestamp) $timestamp = '1970-01-01 0:00';
+
+		global $utc_tz;
+		global $user_tz;
+
+		if (!$utc_tz) $utc_tz = new DateTimeZone('UTC');
+
+		$timestamp = substr($timestamp, 0, 19);
+
+		# We store date in UTC internally
+		$dt = new DateTime($timestamp, $utc_tz);
+
+		$user_tz_string = get_pref('USER_TIMEZONE', $owner_uid);
+
+		if ($user_tz_string != 'Automatic') {
+
+			try {
+				if (!$user_tz) $user_tz = new DateTimeZone($user_tz_string);
+			} catch (Exception $e) {
+				$user_tz = $utc_tz;
+			}
+
+			$tz_offset = $user_tz->getOffset($dt);
+		} else {
+			$tz_offset = (int) -$_SESSION["clientTzOffset"];
+		}
+
+		$user_timestamp = $dt->format('U') + $tz_offset;
+
+		if (!$no_smart_dt) {
+			return self::smart_date_time($user_timestamp,
+				$tz_offset, $owner_uid, $eta_min);
+		} else {
+			if ($long)
+				$format = get_pref('LONG_DATE_FORMAT', $owner_uid);
+			else
+				$format = get_pref('SHORT_DATE_FORMAT', $owner_uid);
+
+			return date($format, $user_timestamp);
+		}
+	}
+
+	static function convert_timestamp($timestamp, $source_tz, $dest_tz) {
+
+		try {
+			$source_tz = new DateTimeZone($source_tz);
+		} catch (Exception $e) {
+			$source_tz = new DateTimeZone('UTC');
+		}
+
+		try {
+			$dest_tz = new DateTimeZone($dest_tz);
+		} catch (Exception $e) {
+			$dest_tz = new DateTimeZone('UTC');
+		}
+
+		$dt = new DateTime(date('Y-m-d H:i:s', $timestamp), $source_tz);
+		return $dt->format('U') + $dest_tz->getOffset($dt);
+	}
+
+}
-- 
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