Reaver

robot.js

var robots = {
  mine: {},
  theirs: {}
};

var routines = {
  searching: function(robot) {
    robot.turn(1);
    robot.rotateCannon(1);
  },
  hunting: function(robot) {
    robot.clone();
    routines.hunting = routines.afterClone;
  },
  afterClone: function(robot) {
    robot.back(1);
  }
};

var onIdle = routines.searching;

// Determines whether a sighted bot is
// an enemy to be tracked and shot at.
function isEnemy(robot) {
  if (robots.mine[robot.id]) {
    return false;
  }
  
  if (robots.mine[robot.parentId]) {
    robots.mine[robot.id] = robot;
    return false;
  }
  
  robots.theirs[robot.id] = robot;
  return true;
}

function onRobotCollision(robot, bearing, collidedRobot, myFault) {
  var otherbot = determineBot(collidedRobot);
  if (otherbot.indexOf('enemy') >= 0) {
    robot.fire();
  }
}

function onWallCollision(robot, bearing) {
  //
}

function onScannedRobot(robot, scannedRobot) {
  if (isEnemy(scannedRobot)) {
    onIdle = routines.hunting;
  }
}

function onHitByBullet(robot, bulletBearing) {
  robot.turn(bulletBearing);
}

//FightCode can only understand your robot
//if its class is called Robot
function Robot(robot) {
  robots.mine[robot.id] = robot;
};

Robot.prototype.onIdle = function(ev) {
  onIdle(ev.robot);
};

// this method gets called whenever we hit another robot...
Robot.prototype.onRobotCollision = function(ev) {
  onRobotCollision(ev.robot, ev.bearing, ev.collidedRobot, ev.myFault);
};

// this method gets called whenever we hit a wall...
Robot.prototype.onWallCollision = function(ev) {
  onWallCollision(ev.robot, ev.bearing);
};

Robot.prototype.onScannedRobot = function(ev) {
  onScannedRobot(ev.robot, ev.scannedRobot);
};

// ohhh... we were hit by another robot...
Robot.prototype.onHitByBullet = function(ev) {
  onHitByBullet(ev.robot, ev.bulletBearing);
};