@screeps/engine/src/processor/intents/towers/attack.js

This is a module for Screeps standalone server. See [main repository](https://github.com/screeps/screeps) for more info.

var _ = require('lodash'),
    utils =  require('../../../utils'),
    driver = utils.getDriver(),
    C = driver.constants;

module.exports = function(object, intent, roomObjects, roomTerrain, bulk, bulkUsers, roomController, stats, gameTime, roomInfo) {

    if(object.type != 'tower') {
        return;
    }
    if(object.spawning) {
        return;
    }

    var target = roomObjects[intent.id];
    if(!target || target == object) {
        return;
    }
    if(target.type == 'creep' && target.spawning) {
        return;
    }
    if(!target.hits) {
        return;
    }
    if(object.energy < C.TOWER_ENERGY_COST) {
        return;
    }
    var rampart = _.find(roomObjects, {type: 'rampart', x: target.x, y: target.y});
    if(rampart) {
        target = rampart;
    }

    var range = Math.max(Math.abs(target.x - object.x), Math.abs(target.y - object.y));
    var effect = C.TOWER_POWER_ATTACK;
    if(range > C.TOWER_OPTIMAL_RANGE) {
        if(range > C.TOWER_FALLOFF_RANGE) {
            range = C.TOWER_FALLOFF_RANGE;
        }
        effect -= effect * C.TOWER_FALLOFF * (range - C.TOWER_OPTIMAL_RANGE) / (C.TOWER_FALLOFF_RANGE - C.TOWER_OPTIMAL_RANGE);
    }
    effect = Math.floor(effect);

    if(!effect) {
        return;
    }

    require('../_damage')(object, target, effect, 'ranged', roomObjects, roomTerrain, bulk, roomController, stats, gameTime, roomInfo);

    object.energy -= C.TOWER_ENERGY_COST;
    bulk.update(object, {energy: object.energy});


    object.actionLog.attack = {x: target.x, y: target.y};
    if(target.actionLog) {
        target.actionLog.attacked = {x: object.x, y: object.y};
    }

    if(target.notifyWhenAttacked) {
        utils.sendAttackingNotification(target, roomController);
    }




};