module.exports=inject; function inject(serv, player) { function attackEntity(entityId) { var attackedPlayer = serv.entities[entityId].player; attackedPlayer.entity.health -= 1; attackedPlayer._client.write('update_health', { food: attackedPlayer.entity.food, foodSaturation: 0.0, health: attackedPlayer.entity.health }); } player._client.on("use_entity", function(packet) { if(packet.mouse == 1) { attackEntity(packet.target); } }); }