player/player.go: Reset food exhaustion and tick when food loss is ca…

…ncelled (#903)

Co-authored-by: CJ <[email protected]>
Co-authored-by: jack <[email protected]>

server/player/hunger.go

@@ -67,6 +67,16 @@ func (m *hungerManager) Reset() {
 	m.foodTick = 0
 }
 
+// ResetExhaustion resets the player's exhaustion level to 0.
+// Prevents the player's food level from decreasing after preventing food loss.
+func (m *hungerManager) resetExhaustion() {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	m.exhaustionLevel = 0
+	m.saturationLevel = 0
+	m.foodTick = 0
+}
+
 // exhaust exhausts the player by the amount of points passed. If the total exhaustion level exceeds 4, a
 // saturation point, or food point, if saturation is 0, will be subtracted.
 func (m *hungerManager) exhaust(points float64) {

server/player/player.go

@@ -762,6 +762,12 @@ func (p *Player) Exhaust(points float64) {
 
 		ctx := event.C(p)
 		if p.Handler().HandleFoodLoss(ctx, before, &after); ctx.Cancelled() {
+			// Reset the exhaustion level if the event was cancelled.
+			// Because if we cancel this on some moments, and after a time we don't cancel it,
+			// the first food level going to decrease a bit faster than expected.
+			// An example is if we cancelled that on a world, and we change of world, our food decrease very fast on the next tick
+			p.hunger.resetExhaustion()
+
 			return
 		}
 		p.hunger.SetFood(after)