screeps/role.guard.js

var battle = require('battle')

var roleGuard = {
    getLastFlag: function(){
        let patrolFlags = _.filter(Game.flags, function(flag){
            return flag.name.indexOf("patrol_") == 0;
        });
        let flagNumbers = _.map(patrolFlags, function(flag){ 
            return parseInt(flag.name.substring("patrol_".length, flag.name.length));
        });
        let max =  Math.max.apply(Math, flagNumbers);
        return max;
    },
    run: function(creep){
        console.log(creep, 'running Guard')
        // Reset creep to 1
        creep.memory.patrolDestination = creep.memory.patrolDestination || 1;

    	var target = battle.findEnemy(creep);
    	if(target != creep.room.controller && creep.hits > creep.hitsMax - 500 /* no more attack */) {
            console.log('\t', creep, 'attacking:',target)
    		creep.moveTo(target);
    		creep.attack(target);
    	} else {
            var destinationFlag = Game.flags['patrol_' + creep.memory.patrolDestination];
            
            if (creep.pos.isEqualTo(destinationFlag)){
                creep.memory.patrolDestination += 1;
            }

            if (creep.memory.patrolDestination > this.getLastFlag()){
                creep.memory.patrolDestination = 1;
            }
            destinationFlag = Game.flags['patrol_' + creep.memory.patrolDestination];
            console.log('\tMoving to Patrol leg:', creep.memory.patrolDestination);
    		creep.moveTo(destinationFlag);
    	}

    }
}
module.exports = roleGuard;