WarriorJS Beginner Tower - https://github.com/olistic/warriorjs

Player.js

class Player {
  constructor() {
    this.health = 20;
    this.healing = false;
  }

  playTurn(warrior) {
    if (warrior.health() > 12 && !this.healing) {
      this.sense(warrior);
    } else if (warrior.health() < this.health) {
      this.sense(warrior, 'backward');
    } else {
      this.healing = warrior.health() === 20 ? false : true;
      warrior.rest();
    }
    this.health = warrior.health();
  }

  sense(warrior, direction = 'forward') {
    const views = [
      {direction: direction, spaces: warrior.look(direction)},
      {direction: this.turn(direction), spaces: warrior.look(this.turn(direction))},
      {direction: this.turn(direction, 2), spaces: warrior.look(this.turn(direction, 2))},
      {direction: this.turn(direction, 3), spaces: warrior.look(this.turn(direction, 3))}
    ]
    let threats = [];

    for(let i=0; i<views.length; i++) {
      if (views[i].spaces[0].isEmpty()) {
        if (views[i].spaces[1].isEnemy() || views[i].spaces[2].isEnemy()) {
          warrior.shoot(views[i].direction);
          return;
        }
      } else {
        threats.push(views[i]);
      }
    };

    threats = threats.sort((a, b) => a.spaces[0].isEnemy() ? -1 : 1);

    this.move(warrior, threats.length > 0 ? threats[0].direction: direction);
  }

  move(warrior, direction = 'forward') {
    if (warrior.feel(direction).isWall()) {
      warrior.pivot();
    } else if (warrior.feel(direction).isCaptive()) {
      warrior.rescue();
    } else if (warrior.feel(direction).isEnemy()) {
      warrior.attack(direction);
    } else {
      warrior.walk(direction);
    }
  }

  turn(direction, times=1) {
    let newDirection = direction;
    for (let i=0; i<times; i++) {
      switch (newDirection) {
        case 'forward':
        newDirection = 'right';
        case 'right':
        newDirection = 'backward';
        case 'backward':
        newDirection = 'left';
        case 'left':
        newDirection = 'forward';
      }
    }
    return newDirection;
  }
}