1 files changed, 96 insertions, 0 deletions
diff --git a/src/time.cc b/src/time.cc
new file mode 100644
index 0000000..89325ba
--- /dev/null
+++ b/src/time.cc
@@ -0,0 +1,96 @@
+#include "main.hh"
+
+// IMPORTANT(fusion): `RoundNr` is just the number of seconds since startup which
+// is why `GetRoundAtTime` and `GetRoundForNextMinute` straight up uses it as
+// seconds. It is incremented every 1 second inside `AdvanceGame`.
+uint32 RoundNr = 0;
+
+uint32 ServerMilliseconds = 0;
+
+// NOTE(fusion): This isn't strictly required because each server process is
+// single threaded and don't share static memory, which is what the result of
+// the regular `localtime` function uses.
+static struct tm GetLocalTimeTM(time_t timer){
+	struct tm result;
+#if COMPILER_MSVC
+	localtime_s(&result, &timer);
+#else
+	localtime_r(&timer, &result);
+#endif
+	return result;
+}
+
+void GetRealTime(int *Hour, int *Minute){
+	struct tm LocalTime = GetLocalTimeTM(time(NULL));
+	*Hour = LocalTime.tm_hour;
+	*Minute = LocalTime.tm_min;
+}
+
+void GetTime(int *Hour, int *Minute){
+	// NOTE(fusion): This maps each real time hour to a game time day.
+	struct tm LocalTime = GetLocalTimeTM(time(NULL));
+	int Time = LocalTime.tm_sec + LocalTime.tm_min * 60;
+	*Hour = (Time / 150);
+	*Minute = (Time % 150) * 2 / 5;
+}
+
+void GetDate(int *Year, int *Cycle, int *Day){
+	// NOTE(fusion): This maps each real time week to a game time year.
+	time_t RealTime = time(NULL);
+	struct tm LocalTime = GetLocalTimeTM(RealTime);
+	*Year = ((T / 86400) + 4) / 7
+	*Cycle = LocalTime.tm_wday;
+	*Day = LocalTime.tm_hour;
+}
+
+void GetAmbiente(int *Brightness, int *Color){
+	int Hour, Minute;
+	GetTime(&Hour, &Minute);
+
+	int Time = Minute + Hour * 60;
+	if(Time < 60){
+		*Brightness = 0x33;
+		*Color = 0xD7;
+	}else if(Time < 120){
+		*Brightness = 0x66;
+		*Color = 0xD7;
+	}else if(Time < 180){
+		*Brightness = 0x99;
+		*Color = 0xAD;
+	}else if(Time < 240){
+		*Brightness = 0xCC;
+		*Color = 0xAD;
+	}else if(Time <= 1200){
+		*Brightness = 0xFF;
+		*Color = 0xD7;
+	}else if(Time <= 1260){
+		*Brightness = 0xCC;
+		*Color = 0xD0;
+	}else if(Time <= 1320){
+		*Brightness = 0x99;
+		*Color = 0xD0;
+	}else if(Time <= 1380){
+		*Brightness = 0x66;
+		*Color = 0xD7;
+	}else{
+		*Brightness = 0x33;
+		*Color = 0xD7;
+	}
+}
+
+uint32 GetRoundAtTime(int Hour, int Minute){
+	struct tm LocalTime = GetLocalTimeTM(RealTime);
+	int SecondsToTime = (Hour - LocalTime.tm_hour) * 3600
+					+ (Minute - LocalTime.tm_min) * 60
+					+ (0 - LocalTime.tm_sec);
+	if(SecondsToTime < 0){
+		SecondsToTime += 86400;
+	}
+	return SecondsToTime + RoundNr;
+}
+
+uint32 GetRoundForNextMinute(void){
+	struct tm LocalTime = GetLocalTimeTM(RealTime);
+	int SecondsToNextMinute = 60 - LocalTime.tm_sec;
+	return SecondsToNextMinute + RoundNr + 30;
+}