Builder Code

var spawnUtility = require("utility.spawner");
var util = require("utility.functions");

function getOptimalBody(spawn) {
  var body = [];
  var stats = spawnUtility.getSpawnStats(spawn);

  if (stats.parts == 3) {
    return [MOVE, CARRY, WORK];
  }

  for (var i = 0; i <= 25; i++) {
    body.push(MOVE);
    body.push(CARRY);
    body.push(WORK);
    body.push(MOVE);
  }


  while (spawnUtility.getBodyCost(body) > stats.energy || body.length > stats.parts) {
    body.pop();
    body.pop();
  }

  return body;
}

function createCreep(spawn) {
  var body = getOptimalBody(spawn);

  var result = spawn.createCreep(body, null, {
    room: spawn.room.name,
    job: "builder"
  });

  if (result === 0) {
    return true;
  } else if (result === -10) {
    Game.notify("Error! Creep spawning failed with invalid body! " + JSON.stringify(body));
  }
};

module.exports.spawnTick = function(room) {
  var spawns = room.find(FIND_MY_SPAWNS);
  var builders = 0;
  if (spawns.length !== 0) {

    var creeps = [];
    for (creepName in Game.creeps) {
      if (Game.creeps[creepName].memory.room == room.name) {
        creeps.push(Game.creeps[creepName]);
        if (Game.creeps[creepName].memory.job == "builder") {
          builders++;
        }
      }
    }

    var spawns = room.find(FIND_MY_SPAWNS);

    if (builders < 2) {
      createCreep(spawns[0]);
      return true;
    }
  }

  return false;
};

module.exports.tickCreep = function(creep) {
  if (creep.memory.waitTicks) {
    creep.memory.waitTicks = creep.memory.waitTicks - 1;
    return;
  }

  if (creep.carry.energy < 5) {
    if (!creep.memory.container) {
      if (!creep.room.memory.energySources) { return; }

      var source = creep.room.memory.energySources[Math.floor(Math.random() * creep.room.memory.energySources.length)];
      creep.memory.container = {
        x: source.container.x,
        y: source.container.y,
        id: source.container.id
      };

    }

    if (util.distance(creep.memory.container.x, creep.memory.container.y, creep.pos.x, creep.pos.y) < 2) {
      var container = Game.getObjectById(creep.memory.container.id);
      if (container) {
        container.transfer(creep, RESOURCE_ENERGY);
      } else {
        var target = creep.pos.findClosestByRange(FIND_DROPPED_ENERGY);
        creep.pickup(target);
      }
    } else {
      creep.moveTo(creep.memory.container.x, creep.memory.container.y);
    }
  } else {

    creep.memory.container = null;

    var target;

    if (creep.memory.buildTarget) {
      target = Game.getObjectById(creep.memory.buildTarget.id);
      if (!target) {
        creep.memory.buildTarget = null;
      }
    }

    if (!creep.memory.buildTarget) {
      var targets = creep.room.find(FIND_MY_CONSTRUCTION_SITES);

      if(targets.length > 0) {
        creep.memory.buildTarget = {
          x: targets[0].pos.x,
          y: targets[0].pos.y,
          id: targets[0].id,
        };

        target = targets[0];
      } else {
        creep.memory.waitTicks = 10;
        return;
      }
    }

    if (util.distance(creep.memory.buildTarget.x, creep.memory.buildTarget.y, creep.pos.x, creep.pos.y) <= 3) {
      creep.build(target);
    } else {
      creep.moveTo(creep.memory.buildTarget.x, creep.memory.buildTarget.y);
    }

  }
};