roles_scavenger.js

var scavenger = {
	parts: [
		[Game.CARRY, Game.CARRY, Game.MOVE, Game.MOVE]
	],

	action: function()
	{
		var creep = this.creep;

		var droppedEnergy = creep.pos.findNearest(Game.DROPPED_ENERGY, {
			filter: function(en) {
				var pickup = true;
				var tile = creep.room.lookAt(en);
				for(var i in tile)
				{
					if(tile[i].type == "creep" && tile[i].creep.memory && tile[i].creep.memory.role == "miner")
						pickup = false;
				}

				return pickup;
			}
		});

		if(droppedEnergy == null || creep.energy == creep.energyCapacity)
		{
			var nearestSpawn = creep.pos.findNearest(Game.MY_SPAWNS, {
				filter: function(spawn)
				{
					return spawn.energy < spawn.energyCapacity;
				}
			});

			creep.moveTo(nearestSpawn);
			creep.transferEnergy(nearestSpawn);
		}
		else
		{
			creep.moveTo(droppedEnergy);
			creep.pickup(droppedEnergy);
		}
	}
};

module.exports = scavenger;