/// <summary>
/// Download profile pictures of the users
/// </summary>
/// <param name="friends">Friend list</param>
/// <param name="dir">Destination directory</param>
/// <param name="worker">To report progress</param>
private static void DownloadPictures(FriendList friends, string dir, BackgroundWorker worker = null)
{
int i = 0;
foreach (Friend f in friends)
{
if (worker != null && worker.CancellationPending)
{
throw new InterruptedException();
}
if (File.Exists(dir + "/" + f.id + ".jpg"))
{
if (worker != null)
{
worker.ReportProgress((++i * 100) / friends.Count, i);
}
continue;
}
string url = GraphAPI.GetData(f.id + "?fields=picture").SelectToken("picture")
.SelectToken("data")
.SelectToken("url")
.ToString();
DownloadFile(url, dir + "/" + f.id + ".jpg");
if (worker != null)
{
worker.ReportProgress((++i * 100) / friends.Count, i);
}
}
}
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
// first, we show the login dialog
Application.Run(new LoginForm());
// if we haven't managed to retrieve the access token (user didnt sing in or didnt allow the app)
// we have nothing to do
if (Config.ACCESS_TOKEN == null || Config.ACCESS_TOKEN.Length == 0)
{
return;
}
// if we have, we find info about the signed user
Friend user = null;
try {
user = GraphAPI.GetData <Friend>("me?fields=id,name");
} catch (GraphAPIException) {
MessageBox.Show("Couldn't authorize app with your account. Either you didn't log in successfully or you haven't confirmed the app request.");
return;
}
Config.USER_ID = user.id;
Config.USER_NAME = user.name;
// Firing the main window (with settings)
Application.Run(new MainForm());
}
/// <summary>
/// Main generating method which prepares all the data and generates the graph.
/// </summary>
/// <param name="worker">For reporting progress outside as this method runs a loong time (due to downloading)</param>
public static void GenerateGraph(BackgroundWorker worker = null)
{
// load friendlist of our user
FriendList friends = GraphAPI.GetData <FriendList>(Config.USER_ID + "/friends");
// report that loading was fine
worker.ReportProgress(0, friends.Count);
// make sure the report made it through and updated GUI
// this is necessary because the
System.Threading.Thread.Yield();
// create destination directories
if (!File.Exists("cache"))
{
System.IO.Directory.CreateDirectory("cache");
}
string dir = "cache/" + Config.USER_ID;
if (!File.Exists(dir))
{
System.IO.Directory.CreateDirectory(dir);
}
if (!File.Exists(dir + "/photos"))
{
System.IO.Directory.CreateDirectory(dir + "/photos");
}
// load all mutual friends and the whole graph
Graph graph = new Graph();
// if we had loaded the friend information earlier we dont need to redownload it
if (File.Exists(dir + "/data.json"))
{
graph.LoadConnections(dir + "/data.json", worker);
}
else
{
graph.LoadConnections(friends, worker);
graph.SaveConnections(dir + "/data.json");
}
// download profile pictures of the users
DownloadPictures(friends, dir + "/photos", worker);
// now we generate the graph (vertices positions)
// gets map of type: Person -> (x,y)
graph.Calculate(worker);
// and we draw it to a file
Bitmap bmp = DrawGraph(graph.Data, dir, worker);
bmp.Save(dir + "/graph.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
bmp.Dispose();
worker.ReportProgress(100, dir + "/graph.jpg");
}
/// <summary>
/// Loads all mutual friends of all friends and saves them into a graph
/// </summary>
public void LoadConnections(FriendList fl, BackgroundWorker worker = null)
{
data = new FriendGraph();
friends = new Dictionary <string, Friend>();
// creates id->friend addresser
foreach (Friend f in fl)
{
friends.Add(f.id, f);
data.Add(f, new List <Friend>());
}
// downloades mutual friends of every friend in the list
int i = 0;
foreach (KeyValuePair <string, Friend> pair in friends)
{
if (worker != null && worker.CancellationPending)
{
throw new InterruptedException();
}
FriendList mutualFriends = GraphAPI.GetData <FriendList>(pair.Key + "/mutualfriends");
foreach (Friend f in mutualFriends)
{
if (!data[pair.Value].Contains(f))
{
data[pair.Value].Add(f);
}
}
// reporting progress
if (worker != null)
{
worker.ReportProgress((++i * 100) / friends.Count, i);
}
}
}
/// <summary>
/// Alias for GetData<T> when no need for a parsing into a specific class.
/// </summary>
/// <param name="query">Facebook Graph API command (URL)</param>
/// <param name="addToken">Should we add the user access_token to the request?</param>
/// <returns>Parsed recieved data as a object. Can be cast to JObject.</returns>
static public JObject GetData(string query, bool addToken = true)
{
return(GraphAPI.GetData <JObject>(query, addToken));
}