A Closer Look at Profile Management

October 16th, 2008 by John Sedlak Leave a reply »

The Profile class can be mostly anything you want it to be. In the case of Galactic Wars, I use it to store the game data for each player. You will notice that I append the gamer’s gamertag to the profile path due to how storage locations are handled in Windows. The idea is straight forward though: for each gamer, look for a profile file and load it if it exists. If it doesn’t exist, create one and then save it.

You will notice that I am using a peculiar attribute (XmlNodeAttribute) on my class and properties. This is from a new version of Focused Games Framework which has a redesigned XmlProvider.

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using System;
using System.IO;
using System.Xml;
using System.ComponentModel;
 
using FocusedGames.Xml;
 
using Microsoft.Xna.Framework.Storage;
using Microsoft.Xna.Framework.GamerServices;
 
namespace FocusedGames.GalacticWars.Data
{
    [XmlNode("Profile", XmlTypes.Complex)]
    public class Profile
    {
        public const string DataFileName = "profile.xml";
 
        public static Profile FromGamer(SignedInGamer gamer)
        {
            // TODO: Handle exception in a pretty manner.
            if (gamer == null)
                return null;
 
            IAsyncResult result = Guide.BeginShowStorageDeviceSelector(gamer.PlayerIndex, null, null);
 
            while (!result.IsCompleted) ;
 
            StorageDevice device = Guide.EndShowStorageDeviceSelector(result);
 
            StorageContainer container = device.OpenContainer("Galactic Wars");
 
            string dataPath = Path.Combine(container.Path, gamer.Gamertag);
            string dataFile = Path.Combine(dataPath, DataFileName);
 
            Profile profile = null;
 
            bool doSave = false;
            if (File.Exists(dataFile))
            {
                // DESERIALIZE THAT SHIZ YO!
                XmlProvider provider = new XmlProvider();
 
                XmlDocument document = new XmlDocument();
                document.Load(dataFile);
 
                profile = provider.Deserialize(document.SelectSingleNode("Profile")) as Profile;
            }
            else
            {
                doSave = true;
 
                profile = new Profile();
 
                profile.GamerTag = gamer.Gamertag;
                profile.Credits = 15000;
                profile.GameVersion = GameContext.NormalizedVersion;
            }
 
            if (profile != null)
            {
                profile.Gamer = gamer;
                profile.StoragePath = dataPath;
 
                if (doSave) SaveProfile(profile);
            }
 
            return profile;
        }
 
        public static void SaveProfile(Profile profile)
        {
            XmlDocument document = new XmlDocument();
 
            document.AppendChild(document.CreateXmlDeclaration("1.0", "UTF-8", null));
 
            XmlProvider provider = new XmlProvider();
 
            document.AppendChild(provider.Serialize(profile, document));
 
            if (!Directory.Exists(profile.StoragePath))
                Directory.CreateDirectory(profile.StoragePath);
 
            document.Save(Path.Combine(profile.StoragePath, DataFileName));
        }
 
        public Profile()
        {
        }
 
        public SignedInGamer Gamer { get; set; }
        public string StoragePath { get; set; }
 
        [XmlNode("GamerTag", XmlTypes.Simple)]
        public string GamerTag { get; set; }
 
        [XmlNode("Credits", XmlTypes.Simple)]
        [TypeConverter(typeof(Int32Converter))]
        public int Credits { get; set; }
 
        [XmlNode("GameVersion", XmlTypes.Simple)]
        public string GameVersion { get; set; }
    }
}
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