up3

server/entity/health.go

@@ -0,0 +1,42 @@
+package entity
+
+// HealthManager handles the health of an entity.
+type HealthManager struct {
+	health float64
+	max    float64
+}
+
+// NewHealthManager returns a new health manager with the health and max health provided.
+func NewHealthManager(health, max float64) *HealthManager {
+	if health > max {
+		health = max
+	}
+	return &HealthManager{health: health, max: max}
+}
+
+// Health returns the current health of an entity.
+func (m *HealthManager) Health() float64 {
+	return m.health
+}
+
+// AddHealth adds a given amount of health points to the player. If the health added to the current health
+// exceeds the max, health will be set to the max. If the health is instead negative and results in a health
+// lower than 0, the final health will be 0.
+func (m *HealthManager) AddHealth(health float64) {
+	m.health = max(min(m.health+health, m.max), 0)
+}
+
+// MaxHealth returns the maximum health of the entity.
+func (m *HealthManager) MaxHealth() float64 {
+	return m.max
+}
+
+// SetMaxHealth changes the max health of an entity to the maximum passed. If the maximum is set to 0 or
+// lower, SetMaxHealth will default to a value of 1.
+func (m *HealthManager) SetMaxHealth(max float64) {
+	if max <= 0 {
+		max = 1
+	}
+	m.max = max
+	m.health = min(m.health, max)
+}