screep/harvester.js

const path = require('path')
module.exports = {
    run(creep) {
        let status = change_status()
        switch (status) {
            case 'harvester':
                creep.say('hv')
                harvester_job(creep)
                break
            case 'picker':
                creep.say('pc')
                picker_job(creep)
                break
        }
    }
}


function harvester_job(creep) {
    if (creep.carry.energy < creep.carryCapacity) {
        let working_target_id = creep.working_target_id;
        let working_target = Game.getObjectById(working_target_id);
        if (creep.harvest(working_target) == ERR_NOT_IN_RANGE) {
            creep.moveTo(working_target);
            path.visualPath(creep.pos, working_target.pos);
        }
    } else {
        if (creep.transfer(Game.spawns['Spawn1'], RESOURCE_ENERGY) == ERR_NOT_IN_RANGE) {
            creep.moveTo(Game.spawns['Spawn1']);
            path.visualPath(creep.pos, Game.spawns['Spawn1'].pos);
        }
    }
}

function picker_job(creep) {
    if (Game.spawns['Spawn1'].store.getFreeCapacity(RESOURCE_ENERGY) == 0) {
        creep.say('SB')
        return
    }
    let working_target_id = creep.working_target_id;
    if (!working_target_id) {
        creep.say('SB')
    }
    let working_target = Game.getObjectById(working_target_id);
    let Re_code = creep.harvest(working_target);
    if (Re_code == ERR_NOT_IN_RANGE) {
        creep.moveTo(working_target);
    } else {
        if (OK == Re_code) {
            creep.harvest(working_target);
            creep.drop(RESOURCE_ENERGY);
        }
    }
}

function change_status() {
    if (_(Game.creeps).filter({ memory: { role: 'transfer' } }).size() > 0) {
        return 'picker'
    } else {
        return 'harvester'
    }
}