From 721ee527eb3291867784228827880bea86093d2f Mon Sep 17 00:00:00 2001
From: fallenoak <git@fallenoak.me>
Date: Wed, 28 Jan 2026 22:01:23 -0600
Subject: [PATCH] feat(util): add CGameTime::GameTimeUpdate

---
 src/util/time/CGameTime.cpp  | 22 ++++++++++++++++++++++
 src/util/time/CGameTime.hpp  |  1 +
 test/util/time/CGameTime.cpp | 20 ++++++++++++++++++++
 3 files changed, 43 insertions(+)

diff --git a/src/util/time/CGameTime.cpp b/src/util/time/CGameTime.cpp
index 6cf165c..f0ecf39 100644
--- a/src/util/time/CGameTime.cpp
+++ b/src/util/time/CGameTime.cpp
@@ -42,6 +42,28 @@ void CGameTime::GameTimeSetTime(const WowTime& time, bool shouldTick) {
     }
 }
 
+void CGameTime::GameTimeUpdate(float elapsedSec) {
+    this->m_gameMinutesThisTick += this->m_gameMinutesPerRealSecond * elapsedSec;
+
+    // Skip minute ticks for time differential
+    if (this->m_timeDifferential != 0 && this->m_gameMinutesThisTick >= 1.0f) {
+        auto minutesToConsume = static_cast<uint32_t>(this->m_gameMinutesThisTick);
+
+        // Clamp to differential
+        if (this->m_timeDifferential < minutesToConsume) {
+            minutesToConsume = this->m_timeDifferential;
+        }
+
+        this->m_timeDifferential -= minutesToConsume;
+        this->m_gameMinutesThisTick -= static_cast<float>(minutesToConsume);
+    }
+
+    while (this->m_gameMinutesThisTick >= 1.0f) {
+        this->m_gameMinutesThisTick -= 1.0f;
+        this->TickMinute();
+    }
+}
+
 void CGameTime::PerformCallbacks(int32_t minutes) {
     // TODO
 }
diff --git a/src/util/time/CGameTime.hpp b/src/util/time/CGameTime.hpp
index 445dbf9..ed02236 100644
--- a/src/util/time/CGameTime.hpp
+++ b/src/util/time/CGameTime.hpp
@@ -7,6 +7,7 @@ class CGameTime : public WowTime {
     public:
         // Public member functions
         void GameTimeSetTime(const WowTime& time, bool shouldTick);
+        void GameTimeUpdate(float elapsedSec);
 
     private:
         // Private member variables
diff --git a/test/util/time/CGameTime.cpp b/test/util/time/CGameTime.cpp
index 88dfd6d..4f1d20c 100644
--- a/test/util/time/CGameTime.cpp
+++ b/test/util/time/CGameTime.cpp
@@ -37,3 +37,23 @@ TEST_CASE("CGameTime::GameTimeSetTime", "[util]") {
         CHECK(gameTime.m_year == 26);
     }
 }
+
+TEST_CASE("CGameTime::GameTimeUpdate", "[util]") {
+    SECTION("updates game time correctly") {
+        WowTime time;
+        time.m_minute = 18;
+        time.m_hour = 11;
+        time.m_weekday = 3;
+        time.m_monthday = 27;
+        time.m_month = 0;
+        time.m_year = 26;
+
+        CGameTime gameTime;
+        gameTime.GameTimeSetTime(time, true);
+
+        gameTime.GameTimeUpdate(60.0f);
+
+        CHECK(gameTime.m_hour == 11);
+        CHECK(gameTime.m_minute == 19);
+    }
+}