From ae05d5e654752e3cced8b8f3818bd278c12a2196 Mon Sep 17 00:00:00 2001
From: Natalie Clarius <natalie_clarius@yahoo.de>
Date: Sat, 27 Aug 2022 18:07:28 +0200
Subject: [PATCH] plugins/nightcolor: change time handling to allow for
 arbitrary morning and evening times

BUG: 445758
---
 src/plugins/nightcolor/nightcolormanager.cpp | 36 +++++++++-----------
 src/plugins/nightcolor/nightcolormanager.h   |  3 ++
 2 files changed, 19 insertions(+), 20 deletions(-)

diff --git a/src/plugins/nightcolor/nightcolormanager.cpp b/src/plugins/nightcolor/nightcolormanager.cpp
index 75edd6fa5e..e3c58bee41 100644
--- a/src/plugins/nightcolor/nightcolormanager.cpp
+++ b/src/plugins/nightcolor/nightcolormanager.cpp
@@ -293,13 +293,7 @@ void NightColorManager::readConfig()
     QTime mrB = QTime::fromString(s->morningBeginFixed(), "hhmm");
     QTime evB = QTime::fromString(s->eveningBeginFixed(), "hhmm");
 
-    int diffME = mrB.msecsTo(evB);
-    if (diffME <= 0) {
-        // morning not strictly before evening - use defaults
-        mrB = QTime(6, 0);
-        evB = QTime(18, 0);
-        diffME = mrB.msecsTo(evB);
-    }
+    int diffME = evB > mrB ? mrB.msecsTo(evB) : evB.msecsTo(mrB);
     int diffMin = qMin(diffME, MSC_DAY - diffME);
 
     int trTime = s->transitionTime() * 1000 * 60;
@@ -524,20 +518,19 @@ void NightColorManager::updateTransitionTimings(bool force)
     const QDateTime todayNow = QDateTime::currentDateTime();
 
     if (m_mode == NightColorMode::Timings) {
-        const QDateTime morB = QDateTime(todayNow.date(), m_morning);
-        const QDateTime morE = morB.addSecs(m_trTime * 60);
-        const QDateTime eveB = QDateTime(todayNow.date(), m_evening);
-        const QDateTime eveE = eveB.addSecs(m_trTime * 60);
+        const QDateTime nextMorB = QDateTime(todayNow.date().addDays(m_morning < todayNow.time()), m_morning);
+        const QDateTime nextMorE = nextMorB.addSecs(m_trTime * 60);
+        const QDateTime nextEveB = QDateTime(todayNow.date().addDays(m_evening < todayNow.time()), m_evening);
+        const QDateTime nextEveE = nextEveB.addSecs(m_trTime * 60);
 
-        if (morB <= todayNow && todayNow < eveB) {
-            m_next = DateTimes(eveB, eveE);
-            m_prev = DateTimes(morB, morE);
-        } else if (todayNow < morB) {
-            m_next = DateTimes(morB, morE);
-            m_prev = DateTimes(eveB.addDays(-1), eveE.addDays(-1));
+        if (nextEveB < nextMorB) {
+            m_daylight = true;
+            m_next = DateTimes(nextEveB, nextEveE);
+            m_prev = DateTimes(nextMorB.addDays(-1), nextMorE.addDays(-1));
         } else {
-            m_next = DateTimes(morB.addDays(1), morE.addDays(1));
-            m_prev = DateTimes(eveB, eveE);
+            m_daylight = false;
+            m_next = DateTimes(nextMorB, nextMorE);
+            m_prev = DateTimes(nextEveB.addDays(-1), nextEveE.addDays(-1));
         }
         Q_EMIT previousTransitionTimingsChanged();
         Q_EMIT scheduledTransitionTimingsChanged();
@@ -570,14 +563,17 @@ void NightColorManager::updateTransitionTimings(bool force)
         // in case this fails, reset them
         DateTimes morning = getSunTimings(todayNow, lat, lng, true);
         if (todayNow < morning.first) {
+            m_daylight = false;
             m_prev = getSunTimings(todayNow.addDays(-1), lat, lng, false);
             m_next = morning;
         } else {
             DateTimes evening = getSunTimings(todayNow, lat, lng, false);
             if (todayNow < evening.first) {
+                m_daylight = true;
                 m_prev = morning;
                 m_next = evening;
             } else {
+                m_daylight = false;
                 m_prev = evening;
                 m_next = getSunTimings(todayNow.addDays(1), lat, lng, true);
             }
@@ -624,7 +620,7 @@ bool NightColorManager::checkAutomaticSunTimings() const
 
 bool NightColorManager::daylight() const
 {
-    return m_prev.first.date() == m_next.first.date();
+    return m_daylight;
 }
 
 int NightColorManager::currentTargetTemp() const
diff --git a/src/plugins/nightcolor/nightcolormanager.h b/src/plugins/nightcolor/nightcolormanager.h
index 1fa6a1a5c0..8206a9a87a 100644
--- a/src/plugins/nightcolor/nightcolormanager.h
+++ b/src/plugins/nightcolor/nightcolormanager.h
@@ -280,6 +280,9 @@ private:
     DateTimes m_prev = DateTimes();
     DateTimes m_next = DateTimes();
 
+    // whether it is currently day or night
+    bool m_daylight = true;
+
     // manual times from config
     QTime m_morning = QTime(6, 0);
     QTime m_evening = QTime(18, 0);