creep.action.defending.js

let action = new Creep.Action('defending');
module.exports = action;
action.isValidAction = function(creep){ return creep.room.hostiles.length > 0; };
action.isAddableAction = function(){ return true; };
action.isAddableTarget = function(){ return true; };
action.isValidTarget = function(target){
    return (
        target &&
        target.hits != null &&
        target.hits > 0 &&
        target.my == false );
};
action.newTarget = function(creep){
    var closestHostile = creep.pos.findClosestByRange(creep.room.hostiles, {
        function(hostile){ return _.some(hostile.body, {'type': HEAL}); }
    });
    if(!closestHostile) {
        closestHostile = creep.pos.findClosestByRange(creep.room.hostiles);
    }
    return closestHostile;
};
action.step = function(creep){
    if(CHATTY) creep.say(this.name, SAY_PUBLIC);
    this.run[creep.data.creepType](creep);
};
action.run = {
    ranger: function(creep) {
        let range = creep.pos.getRangeTo(creep.target);
        if( !creep.flee ){
            if( range > 3 ){
                let path = creep.room.findPath(creep.pos, creep.target.pos, {ignoreCreeps: false});
                if( path && path.length > 0 ) {
                    let isRampart = COMBAT_CREEPS_RESPECT_RAMPARTS && _.some( creep.room.lookForAt(LOOK_STRUCTURES, path[0].x, path[0].y), {'structureType': STRUCTURE_RAMPART });
                    if(!isRampart){
                        creep.move(path[0].direction);
                    }
                } else {
                    // no path -> try to move by direction
                    let direction = creep.pos.getDirectionTo(creep.target);
                    if( direction ) creep.move(direction);
                }
            }
            if( range < 3 ){
                let direction = creep.target.pos.getDirectionTo(creep);
                if( direction ) creep.move(direction);
            }
        }

        // attack ranged
        let targets = creep.pos.findInRange(creep.room.hostiles, 3);
        if(targets.length > 2) { // TODO: precalc damage dealt
            if(CHATTY) creep.say('MassAttack');
            creep.attackingRanged = creep.rangedMassAttack() == OK;
            return;
        }
        if( range < 4 ) {
            creep.attackingRanged = creep.rangedAttack(creep.target) == OK;
            return;
        }
        if(targets.length > 0){
            creep.attackingRanged = creep.rangedAttack(targets[0]) == OK;
        }
    },
    melee: function(creep) {
        if( !creep.flee ){
            let path = creep.room.findPath(creep.pos, creep.target.pos);
            // not standing in rampart or next step is rampart as well
            if( path && path.length > 0 && (
                !COMBAT_CREEPS_RESPECT_RAMPARTS ||
                !_.some( creep.room.lookForAt(LOOK_STRUCTURES, creep.pos.x, creep.pos.y), {'structureType': STRUCTURE_RAMPART } )  ||
                _.some( creep.room.lookForAt(LOOK_STRUCTURES, path[0].x, path[0].y), {'structureType': STRUCTURE_RAMPART }))
            ){
                creep.move(path[0].direction);
            }
        }
        // attack
        let attacking = creep.attack(creep.target);
        if( attacking == ERR_NOT_IN_RANGE ) {
            let targets = creep.pos.findInRange(creep.room.hostiles, 1);
            if( targets.length > 0)
                creep.attacking = creep.attack(targets[0]) == OK;
        } else creep.attacking = attacking == OK;
    }
};
action.onAssignment = function(creep, target) {
    if( SAY_ASSIGNMENT ) creep.say(String.fromCharCode(9876), SAY_PUBLIC);
};