@screeps/engine/dist/processor/intents/links/transfer.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, roomObjects, roomTerrain, bulk, bulkUsers, roomController) {

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

    if (object.energy < intent.amount || intent.amount < 0) {
        return;
    }

    var target = roomObjects[intent.id];
    if (!target) {
        return;
    }

    if (!_.contains(['link', 'creep'], target.type)) {
        return;
    }
    var targetTotal;
    if (target.type == 'creep') {
        if (Math.abs(target.x - object.x) > 1 || Math.abs(target.y - object.y) > 1) {
            return;
        }
        targetTotal = utils.calcResources(target);
    }
    if (target.type == 'link') {
        if (object.cooldown > 0) {
            return;
        }
        if (!utils.checkStructureAgainstController(object, roomObjects, roomController)) {
            return;
        }
        targetTotal = target.energy;
    }

    if (targetTotal == target.energyCapacity) {
        return;
    }

    var amount = intent.amount;
    if (targetTotal + amount > target.energyCapacity) {
        amount = target.energyCapacity - targetTotal;
    }

    target.energy += amount;
    object.energy -= amount;

    if (target.type == 'link') {
        target.energy -= Math.ceil(amount * C.LINK_LOSS_RATIO);
        object.cooldown += C.LINK_COOLDOWN * Math.max(Math.abs(target.x - object.x), Math.abs(target.y - object.y));
        object.actionLog.transferEnergy = { x: target.x, y: target.y };
    }

    bulk.update(object, { energy: object.energy, cooldown: object.cooldown, actionLog: object.actionLog });
    bulk.update(target, { energy: target.energy });
};
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