From 204932bfeb82b7b3032ed90a1e85b9b07e854c47 Mon Sep 17 00:00:00 2001
From: Christian Hofmaier
Date: Tue, 22 Dec 2020 17:02:21 +0100
Subject: [rebootcontrol] calculate next execution time function

---
 .../rebootcontrol/inc/scheduler.inc.php            | 35 +++++++++++++++++++---
 1 file changed, 31 insertions(+), 4 deletions(-)

diff --git a/modules-available/rebootcontrol/inc/scheduler.inc.php b/modules-available/rebootcontrol/inc/scheduler.inc.php
index 0776885d..27a22646 100644
--- a/modules-available/rebootcontrol/inc/scheduler.inc.php
+++ b/modules-available/rebootcontrol/inc/scheduler.inc.php
@@ -8,7 +8,7 @@ class Scheduler
 			self::deleteSchedule($locationid, $action);
 			return false;
 		}
-		$nextexec = self::calcNextexec($action, $openingTimes);
+		$nextexec = self::calcNextexec($action, $options, $openingTimes);
 		$json_options = json_encode($options);
 		self::upsert($locationid, $action, $nextexec, $json_options);
 		return true;
@@ -22,11 +22,38 @@ class Scheduler
 		));
 	}
 
-	private static function calcNextexec($action, $openingTimes) {
-		//TODO: Calculate nextExec based on openingTimes. Needs action to know if openTimes or closingTimes are used.
-		return 0;
+	private static function calcNextexec($action, $options, $openingTimes) {
+		$openingTimes = json_decode($openingTimes, true);
+		$now = time(); $times = [];
+		foreach ($openingTimes as $row) {
+			// Fetch hour and minutes of opening / closing time.
+			$hourmin = explode(':', ($action == 'wol' ? $row['openingtime'] : $row['closingtime']));
+			// Calculate time based on offset.
+			$min = ($action == 'wol' ? $hourmin[0] * 60 + $hourmin[1] - $options['wol-offset'] : $hourmin[0] * 60 + $hourmin[1] + $options['sd-offset']);
+			// Calculate opening / closing time of each day.
+			foreach ($row['days'] as $day) {
+				$next = strtotime(date('Y-m-d H:i', strtotime($day . ' ' . $min . ' minutes')));
+				if ($next < $now) {
+					$times[] = strtotime(date('Y-m-d H:i', strtotime('next '.$day . ' ' . $min . ' minutes')));
+				} else {
+					$times[] = $next;
+				}
+			}
+		}
+		// Iterate over days, use timestamp with smallest difference to now.
+		$res = 0; $smallestDiff = 0;
+		foreach ($times as $time) {
+			$diff = $time - $now;
+			if ($res == 0 || $diff < $smallestDiff) {
+				$smallestDiff = $diff;
+				$res = $time;
+			}
+		}
+		return $res;
 	}
 
+
+
 	private static function upsert($locationid, $action, $nextexec, $options) {
 		$schedule = Database::queryFirst("SELECT locationid, action 
 			FROM `reboot_scheduler`
-- 
cgit v1.2.3-55-g7522