/**
* ROLE: EXECUTABLE
* CONNECTED VIA: Ownership-based resource management
* PURPOSE: Game engine with entity-component architecture
* FAILURE MODES: Missing components throw error, invalid entities throw error, negative health clamped to zero
*
* Authority: 08-rust-ownership.md
*/
// Plan 08: Rust Ownership - Game Server Simulation
class Entity {
constructor(id) {
this.id = id;
this.components = new Map();
this.isActive = true;
}
addComponent(componentType, component) {
if (!component) {
throw new Error('Component required');
}
this.components.set(componentType, component);
}
getComponent(componentType) {
if (!this.components.has(componentType)) {
throw new Error('Component not found');
}
return this.components.get(componentType);
}
removeComponent(componentType) {
if (!this.components.has(componentType)) {
throw new Error('Component not found');
}
this.components.delete(componentType);
}
}
class Position {
constructor(x, y, z) {
this.x = x;
this.y = y;
this.z = z;
}
update(dx, dy, dz) {
this.x += dx;
this.y += dy;
this.z += dz;
}
}
class Velocity {
constructor(vx, vy, vz) {
this.vx = vx;
this.vy = vy;
this.vz = vz;
}
}
class Health {
constructor(maxHealth) {
this.maxHealth = maxHealth;
this.currentHealth = maxHealth;
}
takeDamage(amount) {
this.currentHealth -= amount;
if (this.currentHealth < 0) {
this.currentHealth = 0;
}
}
heal(amount) {
this.currentHealth += amount;
if (this.currentHealth > this.maxHealth) {
this.currentHealth = this.maxHealth;
}
}
isAlive() {
return this.currentHealth > 0;
}
}
class GameWorld {
constructor() {
this.entities = new Map();
this.nextEntityId = 1;
}
spawnEntity() {
const id = this.nextEntityId++;
const entity = new Entity(id);
this.entities.set(id, entity);
return entity;
}
destroyEntity(entityId) {
if (!this.entities.has(entityId)) {
throw new Error('Entity not found');
}
this.entities.delete(entityId);
}
update(deltaTime) {
const updateResults = [];
for (const entity of this.entities.values()) {
if (!entity.isActive) {
continue;
}
try {
const pos = entity.getComponent('Position');
const vel = entity.getComponent('Velocity');
pos.update(vel.vx * deltaTime, vel.vy * deltaTime, vel.vz * deltaTime);
updateResults.push({ entityId: entity.id, success: true });
} catch (error) {
updateResults.push({ entityId: entity.id, success: false, error: error.message });
}
}
return updateResults;
}
}
const world = new GameWorld();
const player = world.spawnEntity();
player.addComponent('Position', new Position(0, 0, 0));
player.addComponent('Velocity', new Velocity(1, 0, 0));
player.addComponent('Health', new Health(100));
const enemy = world.spawnEntity();
enemy.addComponent('Position', new Position(10, 0, 0));
enemy.addComponent('Velocity', new Velocity(-0.5, 0, 0));
enemy.addComponent('Health', new Health(50));
world.update(0.016);
const playerHealth = player.getComponent('Health');
playerHealth.takeDamage(10);
module.exports = { Entity, Position, Velocity, Health, GameWorld, world };
