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FacebookSession.cs

//
// Mono.Facebook.FacebookSession.cs:
//
// Authors:
//    Thomas Van Machelen (thomas.vanmachelen@gmail.com)
//    George Talusan (george@convolve.ca)
//
// (C) Copyright 2007 Novell, Inc. (http://www.novell.com)
//

// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Xml;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Net;

namespace Mono.Facebook
{
      public class FacebookSession
      {
            Util util;
            SessionInfo session_info;
            string auth_token;

            internal Util Util
            {
                  get { return util; }
            }

            internal string SessionKey
            {
                  get { return session_info.SessionKey; }
            }

            // use this for plain sessions
            public FacebookSession (string api_key, string shared_secret)
            {
                  util = new Util (api_key, shared_secret);
            }

            // use this if you want to re-start an infinite session
            public FacebookSession (string api_key, SessionInfo session_info)
                  : this (api_key, session_info.Secret)
            {
                  this.session_info = session_info;
            }

            public Uri CreateToken ()
            {
                  XmlDocument doc = util.GetResponse ("facebook.auth.createToken");
                  auth_token = doc.InnerText;

                  return new Uri (string.Format ("http://www.facebook.com/login.php?api_key={0}&v=1.0&auth_token={1}", util.ApiKey, auth_token));
            }

            public Uri GetUriForInfiniteToken()
            {
                  return new Uri(string.Format("http://www.facebook.com/code_gen.php?v=1.0&api_key={0}", util.ApiKey));
            }

            public SessionInfo GetSession ()
            {
                  return GetSessionFromToken(auth_token);
            }

            public SessionInfo GetSessionFromToken(string auth_token)
            {
                  this.session_info = util.GetResponse<SessionInfo>("facebook.auth.getSession",
                              FacebookParam.Create("auth_token", auth_token));
                  this.util.SharedSecret = session_info.Secret;

                  this.auth_token = string.Empty;

                  return session_info;
            }

            public Album[] GetAlbums ()
            {
                  AlbumsResponse rsp = util.GetResponse<AlbumsResponse> ("facebook.photos.getAlbums",
                        FacebookParam.Create ("uid", session_info.UId),
                        FacebookParam.Create ("session_key", session_info.SessionKey),
                        FacebookParam.Create ("call_id", DateTime.Now.Ticks));

                  foreach (Album album in rsp.Albums)
                        album.Session = this;

                  return rsp.Albums;
            }

            public Album CreateAlbum (string name, string description, string location)
            {
                  // create parameter list
                  List<FacebookParam> param_list = new List<FacebookParam> ();
                  param_list.Add (FacebookParam.Create ("session_key", session_info.SessionKey));
                  param_list.Add (FacebookParam.Create ("call_id", DateTime.Now.Ticks));
                  param_list.Add (FacebookParam.Create ("name", name));

                  if (description != null && description != string.Empty)
                        param_list.Add (FacebookParam.Create ("description", description));

                  if (location != null && location != string.Empty)
                        param_list.Add (FacebookParam.Create ("location", location));

                  // create the albums
                  Album new_album = util.GetResponse<Album> ("facebook.photos.createAlbum", param_list.ToArray ());
                  new_album.Session = this;

                  // return
                  return new_album;
            }

            public Group[] GetGroups ()
            {
                  return this.GetGroups (session_info.UId, null);
            }

            public Group[] GetGroups (long? uid, long[] gids)
            {
                  List<FacebookParam> param_list = new List<FacebookParam>();
                  param_list.Add (FacebookParam.Create ("session_key", session_info.SessionKey));
                  param_list.Add (FacebookParam.Create ("call_id", DateTime.Now.Ticks));
                  if (uid != null)
                        param_list.Add (FacebookParam.Create ("uid", uid));

                  if (gids != null)
                        param_list.Add (FacebookParam.Create ("gids", gids));

                  GroupsResponse rsp = util.GetResponse<GroupsResponse>("facebook.groups.get", param_list.ToArray ());

                  foreach (Group gr in rsp.Groups)
                        gr.Session = this;

                  return rsp.Groups;
            }

            public Event[] GetEvents ()
            {
                  return GetEvents (session_info.UId, null, 0, 0, null);
            }

            public Event[] GetEvents (long? uid, long[] eids, long start_time, long end_time, string rsvp_status)
            {
                  List<FacebookParam> param_list = new List<FacebookParam>();
                  param_list.Add (FacebookParam.Create ("session_key", session_info.SessionKey));
                  param_list.Add (FacebookParam.Create ("call_id", DateTime.Now.Ticks));
                  if (uid != null)
                        param_list.Add (FacebookParam.Create ("uid", uid));

                  if (eids != null)
                        param_list.Add (FacebookParam.Create ("eids", eids));

                  param_list.Add (FacebookParam.Create ("start_time", start_time));
                  param_list.Add (FacebookParam.Create ("end_time", start_time));
                  if (rsvp_status != null)
                        param_list.Add (FacebookParam.Create ("rsvp_status", rsvp_status));

                  EventsResponse rsp = util.GetResponse<EventsResponse>("facebook.events.get", param_list.ToArray ());

                  foreach (Event evt in rsp.Events)
                        evt.Session = this;

                  return rsp.Events;
            }

            public User GetUserInfo (long uid)
            {
                  User[] users = this.GetUserInfo (new long[1] { uid }, User.FIELDS);

                  if (users.Length < 1)
                        return null;

                  return users[0];
            }

            public User[] GetUserInfo (long[] uids, string[] fields)
            {
                  List<FacebookParam> param_list = new List<FacebookParam>();
                  param_list.Add (FacebookParam.Create ("session_key", session_info.SessionKey));
                  param_list.Add (FacebookParam.Create ("call_id", DateTime.Now.Ticks));

                  if (uids == null || uids.Length == 0)
                        throw new Exception ("uid not provided");

                  param_list.Add (FacebookParam.Create ("uids", uids));
                  param_list.Add (FacebookParam.Create ("fields", fields));

                  UserInfoResponse rsp = util.GetResponse<UserInfoResponse>("facebook.users.getInfo", param_list.ToArray ());
                  return rsp.Users;
            }

            public Me GetLoggedInUser ()
            {
                  return new Me (session_info.UId, this);
            }

            public Notifications GetNotifications ()
            {
                  Notifications notifications = util.GetResponse<Notifications>("facebook.notifications.get",
                        FacebookParam.Create ("uid", session_info.UId),
                        FacebookParam.Create ("session_key", session_info.SessionKey),
                        FacebookParam.Create ("call_id", DateTime.Now.Ticks));

                  foreach (Friend f in notifications.FriendRequests)
                        f.Session = this;

                  return notifications;
            }

            public Friend[] GetFriends ()
            {
                  FriendsResponse response = Util.GetResponse<FriendsResponse>("facebook.friends.get",
                              FacebookParam.Create ("session_key", SessionKey),
                              FacebookParam.Create ("call_id", DateTime.Now.Ticks));

                  Friend[] friends = new Friend[response.UIds.Length];

                  for (int i = 0; i < friends.Length; i++)
                        friends[i] = new Friend (response.UIds[i], this);

                  return friends;
            }

            public bool AreFriends (Friend friend1, Friend friend2)
            {
                  return AreFriends (friend1.UId, friend2.UId);
            }

            public bool AreFriends (long uid1, long uid2)
            {
                  AreFriendsResponse response = Util.GetResponse<AreFriendsResponse>("facebook.friends.areFriends",
                           FacebookParam.Create ("session_key", SessionKey),
                           FacebookParam.Create ("call_id", DateTime.Now.Ticks),
                           FacebookParam.Create ("uids1", uid1),
                           FacebookParam.Create ("uids2", uid2));

                  return response.friend_infos[0].AreFriends;
            }

            public FriendInfo[] AreFriends (long[] uids1, long[] uids2)
            {
                  List<FacebookParam> param_list = new List<FacebookParam> ();
                  param_list.Add (FacebookParam.Create ("session_key", session_info.SessionKey));
                  param_list.Add (FacebookParam.Create ("call_id", DateTime.Now.Ticks));

                  if (uids1 == null || uids1.Length == 0)
                        throw new Exception ("uids1 not provided");

                  if (uids2 == null || uids2.Length == 0)
                        throw new Exception ("uids2 not provided");

                  param_list.Add (FacebookParam.Create ("uids1", uids1));
                  param_list.Add (FacebookParam.Create ("uids2", uids2));

                  AreFriendsResponse rsp = util.GetResponse<AreFriendsResponse> ("facebook.friends.areFriends", param_list.ToArray ());
                  return rsp.friend_infos;
            }

            public XmlDocument Query (string sql_query)
            {
                  XmlDocument doc = Util.GetResponse ("facebook.fql.query",
                        FacebookParam.Create ("session_key", SessionKey),
                        FacebookParam.Create ("call_id", DateTime.Now.Ticks),
                        FacebookParam.Create ("query", sql_query));

                  return doc;
            }
      }
}

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