[Design Pattern] Adapter Design Pattern - code example

Answer1215 / 2023-05-05 / 原文

interface EnemyAttacker {
  fireWeapon(): void;
  driveForward(): void;
  assignDriver(driverName: string): void;
}

// Target
class EnemyTank implements EnemyAttacker {
  fireWeapon() {
    const attackDamage = Math.round(Math.random() * 10 + 4);
    console.log(`Enemy Tank Does ${attackDamage} Damage`);
  }
  driveForward() {
    const movement = Math.round(Math.random() * 5 + 2);
    console.log(`Enemy Tank moves ${movement} spaces`);
  }
  assignDriver(driverName: string): void {
    console.log(`${driverName} is driving the tank`);
  }
}

// Adaptee
class EnemyRobot {
  smashWithHands() {
    const attackDamage = Math.round(Math.random() * 5 + 1);
    console.log(`Enemy Robot Does ${attackDamage} Damage With its hands`);
  }
  walkForward() {
    const movement = Math.round(Math.random() * 3 + 1);
    console.log(`Enemy Robot walks forward ${movement} spaces`);
  }
  reactToHuman(driverName: string) {
    console.log(`Enemy Robot Tramps on ${driverName}`);
  }
}

// Adapter
class EnemyRobotAdapter implements EnemyAttacker {
  enemyRebot: EnemyRobot;

  constructor(robot: EnemyRobot) {
    this.enemyRebot = robot;
  }

  fireWeapon(): void {
    this.enemyRebot.smashWithHands();
  }
  driveForward(): void {
    this.enemyRebot.walkForward();
  }
  assignDriver(driverName: string): void {
    this.enemyRebot.reactToHuman(driverName);
  }
}

const tank = new EnemyTank();
const robot = new EnemyRobot();
const robotAdapter = new EnemyRobotAdapter(robot);

console.log(`The Robot`);
robot.reactToHuman(`Paul`);
robot.walkForward();
robot.smashWithHands();

console.log("Tank");
tank.assignDriver("Frank");
tank.driveForward();
tank.fireWeapon();

console.log("The Robot with the Adapter");
robotAdapter.assignDriver("Mark");
robotAdapter.driveForward();
robotAdapter.fireWeapon();