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

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

'use strict';

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

module.exports = function (object, intent, scope) {
    let roomObjects = scope.roomObjects,
        bulk = scope.bulk,
        roomController = scope.roomController,
        gameTime = scope.gameTime;


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

    var target = roomObjects[intent.id];
    if (!target || target == object) {
        return;
    }
    if (target.type == 'creep' && target.spawning) {
        return;
    }
    if (!target.hits) {
        return;
    }
    if (object.store.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 amount = C.TOWER_POWER_ATTACK;
    if (range > C.TOWER_OPTIMAL_RANGE) {
        if (range > C.TOWER_FALLOFF_RANGE) {
            range = C.TOWER_FALLOFF_RANGE;
        }
        amount -= amount * C.TOWER_FALLOFF * (range - C.TOWER_OPTIMAL_RANGE) / (C.TOWER_FALLOFF_RANGE - C.TOWER_OPTIMAL_RANGE);
    }
    [C.PWR_OPERATE_TOWER, C.PWR_DISRUPT_TOWER].forEach(power => {
        var effect = _.find(object.effects, { power });
        if (effect && effect.endTime > gameTime) {
            amount *= C.POWER_INFO[power].effect[effect.level - 1];
        }
    });
    amount = Math.floor(amount);

    if (!amount) {
        return;
    }

    require('../_damage')(object, target, amount, C.EVENT_ATTACK_TYPE_RANGED, scope);

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