libempathy/empathy-dispatcher.c

   1 /* * Copyright (C) 2007-2008 Collabora Ltd.
   2  *
   3  * This library is free software; you can redistribute it and/or
   4  * modify it under the terms of the GNU Lesser General Public
   5  * License as published by the Free Software Foundation; either
   6  * version 2.1 of the License, or (at your option) any later version.
   7  *
   8  * This library is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * Lesser General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU Lesser General Public
  14  * License along with this library; if not, write to the Free Software
  15  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  16  *
  17  * Authors: Xavier Claessens <xclaesse@gmail.com>
  18  */
  19
  20 #include <config.h>
  21
  22 #include <string.h>
  23
  24 #include <glib/gi18n-lib.h>
  25
  26 #include <telepathy-glib/enums.h>
  27 #include <telepathy-glib/connection.h>
  28 #include <telepathy-glib/util.h>
  29 #include <telepathy-glib/dbus.h>
  30 #include <telepathy-glib/proxy-subclass.h>
  31 #include <telepathy-glib/gtypes.h>
  32
  33 #include <libmissioncontrol/mission-control.h>
  34
  35 #include <extensions/extensions.h>
  36
  37 #include "empathy-dispatcher.h"
  38 #include "empathy-utils.h"
  39 #include "empathy-tube-handler.h"
  40 #include "empathy-account-manager.h"
  41 #include "empathy-tp-contact-factory.h"
  42 #include "empathy-chatroom-manager.h"
  43 #include "empathy-utils.h"
  44
  45 #define DEBUG_FLAG EMPATHY_DEBUG_DISPATCHER
  46 #include <libempathy/empathy-debug.h>
  47
  48 #define GET_PRIV(obj) EMPATHY_GET_PRIV (obj, EmpathyDispatcher)
  49 typedef struct
  50 {
  51   EmpathyAccountManager *account_manager;
  52   MissionControl *mc;
  53   /* connection to connection data mapping */
  54   GHashTable *connections;
  55   GHashTable *outstanding_classes_requests;
  56   gpointer token;
  57   GSList *tubes;
  58
  59   /* channels which the dispatcher is listening "invalidated" */
  60   GList *channels;
  61 } EmpathyDispatcherPriv;
  62
  63 G_DEFINE_TYPE (EmpathyDispatcher, empathy_dispatcher, G_TYPE_OBJECT);
  64
  65 enum
  66 {
  67   OBSERVE,
  68   APPROVE,
  69   DISPATCH,
  70   LAST_SIGNAL
  71 };
  72
  73 static guint signals[LAST_SIGNAL];
  74 static EmpathyDispatcher *dispatcher = NULL;
  75
  76 typedef struct
  77 {
  78   EmpathyDispatcher *dispatcher;
  79   EmpathyDispatchOperation *operation;
  80   TpConnection *connection;
  81   gchar *channel_type;
  82   guint handle_type;
  83   guint handle;
  84   EmpathyContact *contact;
  85
  86   /* Properties to pass to the channel when requesting it */
  87   GHashTable *request;
  88   EmpathyDispatcherRequestCb *cb;
  89   gpointer user_data;
  90   gpointer *request_data;
  91 } DispatcherRequestData;
  92
  93 typedef struct
  94 {
  95   TpChannel *channel;
  96   /* Channel type specific wrapper object */
  97   GObject *channel_wrapper;
  98 } DispatchData;
  99
 100 typedef struct
 101 {
 102   /* ObjectPath => DispatchData.. */
 103   GHashTable *dispatched_channels;
 104   /* ObjectPath -> EmpathyDispatchOperations */
 105   GHashTable *dispatching_channels;
 106   /* ObjectPath -> EmpathyDispatchOperations */
 107   GHashTable *outstanding_channels;
 108   /* List of DispatcherRequestData */
 109   GList *outstanding_requests;
 110   /* List of requestable channel classes */
 111   GPtrArray *requestable_channels;
 112 } ConnectionData;
 113
 114 typedef struct
 115 {
 116   EmpathyDispatcher *dispatcher;
 117   TpConnection *connection;
 118   char *channel_type;
 119   guint handle_type;
 120   EmpathyDispatcherFindChannelClassCb *callback;
 121   gpointer user_data;
 122 } FindChannelRequest;
 123
 124 static DispatchData *
 125 new_dispatch_data (TpChannel *channel,
 126                    GObject *channel_wrapper)
 127 {
 128   DispatchData *d = g_slice_new0 (DispatchData);
 129   d->channel = g_object_ref (channel);
 130   if (channel_wrapper != NULL)
 131     d->channel_wrapper = g_object_ref (channel_wrapper);
 132
 133   return d;
 134 }
 135
 136 static void
 137 free_dispatch_data (DispatchData *data)
 138 {
 139   g_object_unref (data->channel);
 140   if (data->channel_wrapper != NULL)
 141     g_object_unref (data->channel_wrapper);
 142
 143   g_slice_free (DispatchData, data);
 144 }
 145
 146 static DispatcherRequestData *
 147 new_dispatcher_request_data (EmpathyDispatcher *dispatcher,
 148                              TpConnection *connection,
 149                              const gchar *channel_type,
 150                              guint handle_type,
 151                              guint handle,
 152                              GHashTable *request,
 153                              EmpathyContact *contact,
 154                              EmpathyDispatcherRequestCb *cb,
 155                              gpointer user_data)
 156 {
 157   DispatcherRequestData *result = g_slice_new0 (DispatcherRequestData);
 158
 159   result->dispatcher = g_object_ref (dispatcher);
 160   result->connection = connection;
 161
 162   result->channel_type = g_strdup (channel_type);
 163   result->handle_type = handle_type;
 164   result->handle = handle;
 165   result->request = request;
 166
 167   if (contact != NULL)
 168     result->contact = g_object_ref (contact);
 169
 170   result->cb = cb;
 171   result->user_data = user_data;
 172
 173   return result;
 174 }
 175
 176 static void
 177 free_dispatcher_request_data (DispatcherRequestData *r)
 178 {
 179   g_free (r->channel_type);
 180
 181   if (r->dispatcher != NULL)
 182     g_object_unref (r->dispatcher);
 183
 184   if (r->contact != NULL)
 185     g_object_unref (r->contact);
 186
 187   if (r->request != NULL)
 188     g_hash_table_unref (r->request);
 189
 190   g_slice_free (DispatcherRequestData, r);
 191 }
 192
 193 static ConnectionData *
 194 new_connection_data (void)
 195 {
 196   ConnectionData *cd = g_slice_new0 (ConnectionData);
 197
 198   cd->dispatched_channels = g_hash_table_new_full (g_str_hash, g_str_equal,
 199       g_free, (GDestroyNotify) free_dispatch_data);
 200
 201   cd->dispatching_channels = g_hash_table_new_full (g_str_hash, g_str_equal,
 202       g_free, g_object_unref);
 203
 204   cd->outstanding_channels = g_hash_table_new_full (g_str_hash, g_str_equal,
 205       g_free, NULL);
 206
 207   return cd;
 208 }
 209
 210 static void
 211 free_connection_data (ConnectionData *cd)
 212 {
 213   GList *l;
 214
 215   g_hash_table_destroy (cd->dispatched_channels);
 216   g_hash_table_destroy (cd->dispatching_channels);
 217   int i;
 218
 219   for (l = cd->outstanding_requests ; l != NULL; l = g_list_delete_link (l,l))
 220     {
 221       free_dispatcher_request_data (l->data);
 222     }
 223
 224   if (cd->requestable_channels  != NULL)
 225     {
 226       for (i = 0 ; i < cd->requestable_channels->len ; i++)
 227           g_value_array_free (
 228             g_ptr_array_index (cd->requestable_channels, i));
 229       g_ptr_array_free (cd->requestable_channels, TRUE);
 230     }
 231 }
 232
 233 static void
 234 free_find_channel_request (FindChannelRequest *r)
 235 {
 236   g_object_unref (r->dispatcher);
 237   g_free (r->channel_type);
 238   g_slice_free (FindChannelRequest, r);
 239 }
 240
 241 static void
 242 dispatcher_connection_invalidated_cb (TpConnection *connection,
 243                                       guint domain,
 244                                       gint code,
 245                                       gchar *message,
 246                                       EmpathyDispatcher *dispatcher)
 247 {
 248   EmpathyDispatcherPriv *priv = GET_PRIV (dispatcher);
 249
 250   DEBUG ("Error: %s", message);
 251   g_hash_table_remove (priv->connections, connection);
 252 }
 253
 254 static gboolean
 255 dispatcher_operation_can_start (EmpathyDispatcher *self,
 256                                 EmpathyDispatchOperation *operation,
 257                                 ConnectionData *cd)
 258 {
 259   GList *l;
 260   const gchar *channel_type =
 261     empathy_dispatch_operation_get_channel_type (operation);
 262
 263   for (l = cd->outstanding_requests; l != NULL; l = g_list_next (l))
 264     {
 265       DispatcherRequestData *d = (DispatcherRequestData *) l->data;
 266
 267       if (d->operation == NULL && !tp_strdiff (d->channel_type, channel_type))
 268         {
 269           return FALSE;
 270         }
 271     }
 272
 273   return TRUE;
 274 }
 275
 276 static void
 277 dispatch_operation_flush_requests (EmpathyDispatcher *dispatcher,
 278                                    EmpathyDispatchOperation *operation,
 279                                    GError *error,
 280                                    ConnectionData *cd)
 281 {
 282   GList *l;
 283
 284   l = cd->outstanding_requests;
 285   while (l != NULL)
 286     {
 287       DispatcherRequestData *d = (DispatcherRequestData *) l->data;
 288       GList *lt = l;
 289
 290       l = g_list_next (l);
 291
 292       if (d->operation == operation)
 293         {
 294           if (d->cb != NULL)
 295             {
 296               if (error != NULL)
 297                 d->cb (NULL, error, d->user_data);
 298               else
 299                 d->cb (operation, NULL, d->user_data);
 300             }
 301
 302           cd->outstanding_requests = g_list_delete_link
 303             (cd->outstanding_requests, lt);
 304
 305           free_dispatcher_request_data (d);
 306         }
 307     }
 308 }
 309
 310 static void
 311 dispatcher_channel_invalidated_cb (TpProxy *proxy,
 312                                    guint domain,
 313                                    gint code,
 314                                    gchar *message,
 315                                    EmpathyDispatcher *dispatcher)
 316 {
 317   /* Channel went away... */
 318   EmpathyDispatcherPriv *priv = GET_PRIV (dispatcher);
 319   TpConnection *connection;
 320   EmpathyDispatchOperation *operation;
 321   ConnectionData *cd;
 322   const gchar *object_path;
 323
 324   connection = tp_channel_borrow_connection (TP_CHANNEL (proxy));
 325
 326   cd = g_hash_table_lookup (priv->connections, connection);
 327   /* Connection itself invalidated? */
 328   if (cd == NULL)
 329     return;
 330
 331   object_path = tp_proxy_get_object_path (proxy);
 332
 333   DEBUG ("Channel %s invalidated", object_path);
 334
 335   g_hash_table_remove (cd->dispatched_channels, object_path);
 336   g_hash_table_remove (cd->dispatching_channels, object_path);
 337
 338   priv->channels = g_list_remove (priv->channels, proxy);
 339
 340   operation = g_hash_table_lookup (cd->outstanding_channels, object_path);
 341   if (operation != NULL)
 342     {
 343       GError error = { domain, code, message };
 344       dispatch_operation_flush_requests (dispatcher, operation, &error, cd);
 345       g_hash_table_remove (cd->outstanding_channels, object_path);
 346       g_object_unref (operation);
 347     }
 348 }
 349
 350 static void
 351 dispatch_operation_approved_cb (EmpathyDispatchOperation *operation,
 352                                 EmpathyDispatcher *dispatcher)
 353 {
 354   g_assert (empathy_dispatch_operation_is_incoming (operation));
 355   DEBUG ("Send of for dispatching: %s",
 356     empathy_dispatch_operation_get_object_path (operation));
 357   g_signal_emit (dispatcher, signals[DISPATCH], 0, operation);
 358 }
 359
 360 static void
 361 dispatch_operation_claimed_cb (EmpathyDispatchOperation *operation,
 362                                EmpathyDispatcher *dispatcher)
 363 {
 364   /* Our job is done, remove the dispatch operation and mark the channel as
 365    * dispatched */
 366   EmpathyDispatcherPriv *priv = GET_PRIV (dispatcher);
 367   TpConnection *connection;
 368   ConnectionData *cd;
 369   const gchar *object_path;
 370
 371   connection = empathy_dispatch_operation_get_tp_connection (operation);
 372   cd = g_hash_table_lookup (priv->connections, connection);
 373   g_assert (cd != NULL);
 374
 375   object_path = empathy_dispatch_operation_get_object_path (operation);
 376
 377   if (g_hash_table_lookup (cd->dispatched_channels, object_path) == NULL)
 378     {
 379       DispatchData *d;
 380       d = new_dispatch_data (
 381         empathy_dispatch_operation_get_channel (operation),
 382         empathy_dispatch_operation_get_channel_wrapper (operation));
 383       g_hash_table_insert (cd->dispatched_channels,
 384         g_strdup (object_path), d);
 385     }
 386   g_hash_table_remove (cd->dispatching_channels, object_path);
 387
 388   DEBUG ("Channel claimed: %s", object_path);
 389 }
 390
 391 static void
 392 dispatch_operation_ready_cb (EmpathyDispatchOperation *operation,
 393                              EmpathyDispatcher *dispatcher)
 394 {
 395   EmpathyDispatcherPriv *priv = GET_PRIV (dispatcher);
 396   TpConnection *connection;
 397   ConnectionData *cd;
 398   EmpathyDispatchOperationState status;
 399
 400   g_signal_connect (operation, "approved",
 401     G_CALLBACK (dispatch_operation_approved_cb), dispatcher);
 402
 403   g_signal_connect (operation, "claimed",
 404     G_CALLBACK (dispatch_operation_claimed_cb), dispatcher);
 405
 406   /* Signal the observers */
 407   DEBUG ("Send to observers: %s",
 408     empathy_dispatch_operation_get_object_path (operation));
 409   g_signal_emit (dispatcher, signals[OBSERVE], 0, operation);
 410
 411   empathy_dispatch_operation_start (operation);
 412
 413   /* Signal potential requestors */
 414   connection =  empathy_dispatch_operation_get_tp_connection (operation);
 415   cd = g_hash_table_lookup (priv->connections, connection);
 416   g_assert (cd != NULL);
 417
 418   g_object_ref (operation);
 419   g_object_ref (dispatcher);
 420
 421   dispatch_operation_flush_requests (dispatcher, operation, NULL, cd);
 422   status = empathy_dispatch_operation_get_status (operation);
 423   g_object_unref (operation);
 424
 425   if (status == EMPATHY_DISPATCHER_OPERATION_STATE_CLAIMED)
 426     return;
 427
 428   if (status == EMPATHY_DISPATCHER_OPERATION_STATE_APPROVING)
 429     {
 430       DEBUG ("Send to approvers: %s",
 431         empathy_dispatch_operation_get_object_path (operation));
 432       g_signal_emit (dispatcher, signals[APPROVE], 0, operation);
 433     }
 434   else
 435     {
 436       g_assert (status == EMPATHY_DISPATCHER_OPERATION_STATE_DISPATCHING);
 437       DEBUG ("Send of for dispatching: %s",
 438         empathy_dispatch_operation_get_object_path (operation));
 439       g_signal_emit (dispatcher, signals[DISPATCH], 0, operation);
 440     }
 441
 442   g_object_unref (dispatcher);
 443 }
 444
 445 static void
 446 dispatcher_start_dispatching (EmpathyDispatcher *self,
 447                               EmpathyDispatchOperation *operation,
 448                               ConnectionData *cd)
 449 {
 450   const gchar *object_path =
 451     empathy_dispatch_operation_get_object_path (operation);
 452
 453   DEBUG ("Dispatching process started for %s", object_path);
 454
 455   if (g_hash_table_lookup (cd->dispatching_channels, object_path) == NULL)
 456     {
 457       g_assert (g_hash_table_lookup (cd->outstanding_channels,
 458         object_path) == NULL);
 459
 460       g_hash_table_insert (cd->dispatching_channels,
 461         g_strdup (object_path), operation);
 462
 463       switch (empathy_dispatch_operation_get_status (operation))
 464         {
 465           case EMPATHY_DISPATCHER_OPERATION_STATE_PREPARING:
 466             g_signal_connect (operation, "ready",
 467               G_CALLBACK (dispatch_operation_ready_cb), dispatcher);
 468             break;
 469           case EMPATHY_DISPATCHER_OPERATION_STATE_PENDING:
 470             dispatch_operation_ready_cb (operation, dispatcher);
 471             break;
 472           default:
 473             g_assert_not_reached ();
 474         }
 475
 476     }
 477   else if (empathy_dispatch_operation_get_status (operation) >=
 478       EMPATHY_DISPATCHER_OPERATION_STATE_PENDING)
 479     {
 480       /* Already dispatching and the operation is pending, thus the observers
 481        * have seen it (if applicable), so we can flush the request right away.
 482        */
 483       dispatch_operation_flush_requests (self, operation, NULL, cd);
 484     }
 485 }
 486
 487 static void
 488 dispatcher_flush_outstanding_operations (EmpathyDispatcher *self,
 489                                          ConnectionData *cd)
 490 {
 491   GHashTableIter iter;
 492   gpointer value;
 493
 494   g_hash_table_iter_init (&iter, cd->outstanding_channels);
 495   while (g_hash_table_iter_next (&iter, NULL, &value))
 496     {
 497       EmpathyDispatchOperation *operation = EMPATHY_DISPATCH_OPERATION (value);
 498
 499       if (dispatcher_operation_can_start (self, operation, cd))
 500         {
 501           dispatcher_start_dispatching (dispatcher, operation, cd);
 502           g_hash_table_iter_remove (&iter);
 503         }
 504     }
 505 }
 506
 507 static void
 508 dispatcher_connection_new_channel (EmpathyDispatcher *dispatcher,
 509                                    TpConnection *connection,
 510                                    const gchar *object_path,
 511                                    const gchar *channel_type,
 512                                    guint handle_type,
 513                                    guint handle,
 514                                    GHashTable *properties,
 515                                    gboolean incoming)
 516 {
 517   EmpathyDispatcherPriv *priv = GET_PRIV (dispatcher);
 518   TpChannel         *channel;
 519   ConnectionData *cd;
 520   EmpathyDispatchOperation *operation;
 521   int i;
 522   /* Channel types we never want to dispatch because they're either deprecated
 523    * or can't sensibly be dispatch (e.g. channels that should always be
 524    * requested) */
 525   const char *blacklist[] = {
 526     TP_IFACE_CHANNEL_TYPE_CONTACT_LIST,
 527     TP_IFACE_CHANNEL_TYPE_TUBES,
 528     TP_IFACE_CHANNEL_TYPE_ROOM_LIST,
 529     NULL
 530   };
 531
 532   cd = g_hash_table_lookup (priv->connections, connection);
 533
 534   /* Don't bother with channels we have already dispatched or are dispatching
 535    * currently. This can happen when NewChannel(s) is fired after
 536    * RequestChannel/CreateChannel/EnsureChannel */
 537   if (g_hash_table_lookup (cd->dispatched_channels, object_path) != NULL)
 538     return;
 539
 540   if (g_hash_table_lookup (cd->dispatching_channels, object_path) != NULL)
 541     return;
 542
 543   /* Should never occur, but just in case a CM fires spurious NewChannel(s)
 544    * signals */
 545   if (g_hash_table_lookup (cd->outstanding_channels, object_path) != NULL)
 546     return;
 547
 548   /* Only pick up non-requested text and file channels. For all other it
 549    * doesn't make sense to handle it if we didn't request it. The same goes
 550    * for channels we discovered by the Channels property or ListChannels */
 551   if (!incoming && tp_strdiff (channel_type, TP_IFACE_CHANNEL_TYPE_TEXT)
 552         && tp_strdiff (channel_type, TP_IFACE_CHANNEL_TYPE_FILE_TRANSFER))
 553     {
 554       DEBUG ("Ignoring incoming channel of type %s on %s",
 555         channel_type, object_path);
 556       return;
 557     }
 558
 559   for (i = 0 ; blacklist[i] != NULL; i++)
 560     {
 561       if (!tp_strdiff (channel_type, blacklist[i]))
 562         {
 563           DEBUG ("Ignoring blacklisted channel type %s on %s",
 564             channel_type, object_path);
 565           return;
 566         }
 567     }
 568
 569   DEBUG ("New channel of type %s on %s", channel_type, object_path);
 570
 571   if (properties == NULL)
 572     channel = tp_channel_new (connection, object_path, channel_type,
 573       handle_type, handle, NULL);
 574   else
 575     channel = tp_channel_new_from_properties (connection, object_path,
 576       properties, NULL);
 577
 578   g_signal_connect (channel, "invalidated",
 579     G_CALLBACK (dispatcher_channel_invalidated_cb),
 580     dispatcher);
 581
 582   priv->channels = g_list_prepend (priv->channels, channel);
 583
 584   operation = empathy_dispatch_operation_new (connection, channel, NULL,
 585     incoming);
 586
 587   g_object_unref (channel);
 588
 589   if (incoming)
 590     {
 591       /* Request could either be by us or by a remote party. If there are no
 592        * outstanding requests for this channel type we can assume it's remote.
 593        * Otherwise we wait untill they are all satisfied */
 594       if (dispatcher_operation_can_start (dispatcher, operation, cd))
 595         dispatcher_start_dispatching (dispatcher, operation, cd);
 596       else
 597         g_hash_table_insert (cd->outstanding_channels,
 598           g_strdup (object_path), operation);
 599     }
 600   else
 601     {
 602       dispatcher_start_dispatching (dispatcher, operation, cd);
 603     }
 604 }
 605
 606 static void
 607 dispatcher_connection_new_channel_cb (TpConnection *connection,
 608                                       const gchar *object_path,
 609                                       const gchar  *channel_type,
 610                                       guint handle_type,
 611                                       guint handle,
 612                                       gboolean suppress_handler,
 613                                       gpointer user_data,
 614                                       GObject *object)
 615 {
 616   EmpathyDispatcher *dispatcher = EMPATHY_DISPATCHER (object);
 617
 618   /* Empathy heavily abuses surpress handler (don't try this at home), if
 619    * surpress handler is true then it is an outgoing channel, which is
 620    * requested either by us or some other party (like the megaphone applet).
 621    * Otherwise it's an incoming channel */
 622   dispatcher_connection_new_channel (dispatcher, connection,
 623     object_path, channel_type, handle_type, handle, NULL, !suppress_handler);
 624 }
 625
 626 static void
 627 dispatcher_connection_new_channel_with_properties (EmpathyDispatcher *dispatcher,
 628                                                    TpConnection *connection,
 629                                                    const gchar *object_path,
 630                                                    GHashTable *properties)
 631 {
 632   const gchar *channel_type;
 633   guint handle_type;
 634   guint handle;
 635   gboolean requested;
 636   gboolean valid;
 637
 638
 639   channel_type = tp_asv_get_string (properties,
 640     TP_IFACE_CHANNEL ".ChannelType");
 641   if (channel_type == NULL)
 642     {
 643       g_message ("%s had an invalid ChannelType property", object_path);
 644       return;
 645     }
 646
 647   handle_type = tp_asv_get_uint32 (properties,
 648     TP_IFACE_CHANNEL ".TargetHandleType", &valid);
 649   if (!valid)
 650     {
 651       g_message ("%s had an invalid TargetHandleType property", object_path);
 652       return;
 653     }
 654
 655   handle = tp_asv_get_uint32 (properties,
 656     TP_IFACE_CHANNEL ".TargetHandle", &valid);
 657   if (!valid)
 658     {
 659       g_message ("%s had an invalid TargetHandle property", object_path);
 660       return;
 661     }
 662
 663   /* We assume there is no channel dispather, so we're the only one dispatching
 664    * it. Which means that a requested channel it is outgoing one */
 665   requested = tp_asv_get_boolean (properties,
 666     TP_IFACE_CHANNEL ".Requested", &valid);
 667   if (!valid)
 668     {
 669       g_message ("%s had an invalid Requested property", object_path);
 670       return;
 671     }
 672
 673   dispatcher_connection_new_channel (dispatcher, connection,
 674     object_path, channel_type, handle_type, handle, properties, !requested);
 675 }
 676
 677 static void
 678 dispatcher_connection_new_channels_cb (TpConnection *connection,
 679                                        const GPtrArray *channels,
 680                                        gpointer user_data,
 681                                        GObject *object)
 682 {
 683   EmpathyDispatcher *dispatcher = EMPATHY_DISPATCHER (object);
 684   int i;
 685
 686   for (i = 0; i < channels->len ; i++)
 687     {
 688       GValueArray *arr = g_ptr_array_index (channels, i);
 689       const gchar *object_path;
 690       GHashTable *properties;
 691
 692       object_path = g_value_get_boxed (g_value_array_get_nth (arr, 0));
 693       properties = g_value_get_boxed (g_value_array_get_nth (arr, 1));
 694
 695       dispatcher_connection_new_channel_with_properties (dispatcher,
 696         connection, object_path, properties);
 697     }
 698 }
 699
 700 static void
 701 dispatcher_connection_got_all (TpProxy *proxy,
 702                                GHashTable *properties,
 703                                const GError *error,
 704                                gpointer user_data,
 705                                GObject *object)
 706 {
 707   EmpathyDispatcher *dispatcher = EMPATHY_DISPATCHER (object);
 708   EmpathyDispatcherPriv *priv = GET_PRIV (dispatcher);
 709   GPtrArray *channels;
 710   GPtrArray *requestable_channels;
 711
 712   if (error) {
 713     DEBUG ("Error: %s", error->message);
 714     return;
 715   }
 716
 717   channels = tp_asv_get_boxed (properties, "Channels",
 718     TP_ARRAY_TYPE_CHANNEL_DETAILS_LIST);
 719
 720   if (channels == NULL)
 721     DEBUG ("No Channels property !?! on connection");
 722   else
 723     dispatcher_connection_new_channels_cb (TP_CONNECTION (proxy),
 724       channels, NULL, object);
 725
 726   requestable_channels = tp_asv_get_boxed (properties,
 727     "RequestableChannelClasses", TP_ARRAY_TYPE_REQUESTABLE_CHANNEL_CLASS_LIST);
 728
 729   if (requestable_channels == NULL)
 730     DEBUG ("No RequestableChannelClasses property !?! on connection");
 731   else
 732     {
 733       ConnectionData *cd;
 734       GList *requests, *l;
 735       FindChannelRequest *request;
 736       GStrv retval;
 737
 738       cd = g_hash_table_lookup (priv->connections, proxy);
 739       g_assert (cd != NULL);
 740
 741       cd->requestable_channels = g_boxed_copy (
 742         TP_ARRAY_TYPE_REQUESTABLE_CHANNEL_CLASS_LIST, requestable_channels);
 743
 744       requests = g_hash_table_lookup (priv->outstanding_classes_requests,
 745           proxy);
 746
 747       for (l = requests; l != NULL; l = l->next)
 748         {
 749           request = l->data;
 750
 751           retval = empathy_dispatcher_find_channel_class (dispatcher,
 752               TP_CONNECTION (proxy), request->channel_type,
 753               request->handle_type);
 754           request->callback (retval, request->user_data);
 755
 756           free_find_channel_request (request);
 757         }
 758
 759       g_list_free (requests);
 760
 761       g_hash_table_remove (priv->outstanding_classes_requests, proxy);
 762     }
 763 }
 764
 765 static void
 766 dispatcher_connection_list_channels_cb (TpConnection    *connection,
 767                                         const GPtrArray *channels,
 768                                         const GError    *error,
 769                                         gpointer         user_data,
 770                                         GObject         *dispatcher)
 771 {
 772   int i;
 773
 774   if (error)
 775     {
 776       DEBUG ("Error: %s", error->message);
 777       return;
 778     }
 779
 780   for (i = 0; i < channels->len; i++)
 781     {
 782       GValueArray *values;
 783
 784       values = g_ptr_array_index (channels, i);
 785       /* We don't have any extra info, so assume already existing channels are
 786        * incoming... */
 787       dispatcher_connection_new_channel (EMPATHY_DISPATCHER (dispatcher),
 788         connection,
 789         g_value_get_boxed (g_value_array_get_nth (values, 0)),
 790         g_value_get_string (g_value_array_get_nth (values, 1)),
 791         g_value_get_uint (g_value_array_get_nth (values, 2)),
 792         g_value_get_uint (g_value_array_get_nth (values, 3)),
 793         NULL, TRUE);
 794     }
 795 }
 796
 797 static void
 798 dispatcher_connection_advertise_capabilities_cb (TpConnection    *connection,
 799                                                  const GPtrArray *capabilities,
 800                                                  const GError    *error,
 801                                                  gpointer         user_data,
 802                                                  GObject         *dispatcher)
 803 {
 804   if (error)
 805     DEBUG ("Error: %s", error->message);
 806 }
 807
 808 static void
 809 dispatcher_new_connection_cb (EmpathyAccountManager *manager,
 810                               TpConnection *connection,
 811                               EmpathyDispatcher *dispatcher)
 812 {
 813   EmpathyDispatcherPriv *priv = GET_PRIV (dispatcher);
 814   GPtrArray   *capabilities;
 815   GType        cap_type;
 816   GValue       cap = {0, };
 817   const gchar *remove = NULL;
 818
 819   if (g_hash_table_lookup (priv->connections, connection) != NULL)
 820     return;
 821
 822   g_hash_table_insert (priv->connections, g_object_ref (connection),
 823     new_connection_data ());
 824
 825   g_signal_connect (connection, "invalidated",
 826     G_CALLBACK (dispatcher_connection_invalidated_cb), dispatcher);
 827
 828   if (tp_proxy_has_interface_by_id (TP_PROXY (connection),
 829       TP_IFACE_QUARK_CONNECTION_INTERFACE_REQUESTS))
 830     {
 831       tp_cli_connection_interface_requests_connect_to_new_channels (connection,
 832         dispatcher_connection_new_channels_cb,
 833         NULL, NULL, G_OBJECT (dispatcher), NULL);
 834
 835       tp_cli_dbus_properties_call_get_all (connection, -1,
 836         TP_IFACE_CONNECTION_INTERFACE_REQUESTS,
 837         dispatcher_connection_got_all,
 838         NULL, NULL, G_OBJECT (dispatcher));
 839     }
 840   else
 841     {
 842       tp_cli_connection_connect_to_new_channel (connection,
 843         dispatcher_connection_new_channel_cb,
 844         NULL, NULL, G_OBJECT (dispatcher), NULL);
 845
 846       tp_cli_connection_call_list_channels (connection, -1,
 847         dispatcher_connection_list_channels_cb, NULL, NULL,
 848         G_OBJECT (dispatcher));
 849
 850     }
 851
 852   /* Advertise VoIP capabilities */
 853   capabilities = g_ptr_array_sized_new (1);
 854   cap_type = dbus_g_type_get_struct ("GValueArray", G_TYPE_STRING,
 855     G_TYPE_UINT, G_TYPE_INVALID);
 856   g_value_init (&cap, cap_type);
 857   g_value_take_boxed (&cap, dbus_g_type_specialized_construct (cap_type));
 858   dbus_g_type_struct_set (&cap,
 859         0, TP_IFACE_CHANNEL_TYPE_STREAMED_MEDIA,
 860         1, TP_CHANNEL_MEDIA_CAPABILITY_AUDIO |
 861            TP_CHANNEL_MEDIA_CAPABILITY_VIDEO |
 862            TP_CHANNEL_MEDIA_CAPABILITY_NAT_TRAVERSAL_STUN  |
 863            TP_CHANNEL_MEDIA_CAPABILITY_NAT_TRAVERSAL_GTALK_P2P, G_MAXUINT);
 864   g_ptr_array_add (capabilities, g_value_get_boxed (&cap));
 865
 866   tp_cli_connection_interface_capabilities_call_advertise_capabilities (
 867     connection, -1, capabilities, &remove,
 868     dispatcher_connection_advertise_capabilities_cb,
 869     NULL, NULL, G_OBJECT (dispatcher));
 870
 871   g_value_unset (&cap);
 872   g_ptr_array_free (capabilities, TRUE);
 873 }
 874
 875 static GObject *
 876 dispatcher_constructor (GType type,
 877                         guint n_construct_params,
 878                         GObjectConstructParam *construct_params)
 879 {
 880   GObject *retval;
 881
 882   if (dispatcher == NULL)
 883     {
 884       retval = G_OBJECT_CLASS (empathy_dispatcher_parent_class)->constructor
 885           (type, n_construct_params, construct_params);
 886
 887       dispatcher = EMPATHY_DISPATCHER (retval);
 888       g_object_add_weak_pointer (retval, (gpointer) &dispatcher);
 889     }
 890   else
 891     {
 892       retval = g_object_ref (dispatcher);
 893     }
 894
 895   return retval;
 896 }
 897
 898 static void
 899 dispatcher_finalize (GObject *object)
 900 {
 901   EmpathyDispatcherPriv *priv = GET_PRIV (object);
 902   GList *l;
 903   GHashTableIter iter;
 904   gpointer connection;
 905   GList *list;
 906
 907   g_signal_handlers_disconnect_by_func (priv->account_manager,
 908       dispatcher_new_connection_cb, object);
 909
 910   for (l = priv->channels; l; l = l->next)
 911     {
 912       g_signal_handlers_disconnect_by_func (l->data,
 913           dispatcher_channel_invalidated_cb, object);
 914     }
 915
 916   g_list_free (priv->channels);
 917
 918   g_hash_table_iter_init (&iter, priv->connections);
 919   while (g_hash_table_iter_next (&iter, &connection, NULL))
 920     {
 921       g_signal_handlers_disconnect_by_func (connection,
 922           dispatcher_connection_invalidated_cb, object);
 923     }
 924
 925   g_hash_table_iter_init (&iter, priv->outstanding_classes_requests);
 926   while (g_hash_table_iter_next (&iter, &connection, (gpointer *) &list))
 927     {
 928       g_list_foreach (list, (GFunc) free_find_channel_request, NULL);
 929       g_list_free (list);
 930     }
 931
 932   g_object_unref (priv->account_manager);
 933   g_object_unref (priv->mc);
 934
 935   g_hash_table_destroy (priv->connections);
 936   g_hash_table_destroy (priv->outstanding_classes_requests);
 937 }
 938
 939 static void
 940 empathy_dispatcher_class_init (EmpathyDispatcherClass *klass)
 941 {
 942   GObjectClass *object_class = G_OBJECT_CLASS (klass);
 943
 944   object_class->finalize = dispatcher_finalize;
 945   object_class->constructor = dispatcher_constructor;
 946
 947   signals[OBSERVE] =
 948     g_signal_new ("observe",
 949       G_TYPE_FROM_CLASS (klass),
 950       G_SIGNAL_RUN_LAST,
 951       0,
 952       NULL, NULL,
 953       g_cclosure_marshal_VOID__OBJECT,
 954       G_TYPE_NONE,
 955       1, EMPATHY_TYPE_DISPATCH_OPERATION);
 956
 957   signals[APPROVE] =
 958     g_signal_new ("approve",
 959       G_TYPE_FROM_CLASS (klass),
 960       G_SIGNAL_RUN_LAST,
 961       0,
 962       NULL, NULL,
 963       g_cclosure_marshal_VOID__OBJECT,
 964       G_TYPE_NONE,
 965       1, EMPATHY_TYPE_DISPATCH_OPERATION);
 966
 967   signals[DISPATCH] =
 968     g_signal_new ("dispatch",
 969       G_TYPE_FROM_CLASS (klass),
 970       G_SIGNAL_RUN_LAST,
 971       0,
 972       NULL, NULL,
 973       g_cclosure_marshal_VOID__OBJECT,
 974       G_TYPE_NONE,
 975       1, EMPATHY_TYPE_DISPATCH_OPERATION);
 976
 977   g_type_class_add_private (object_class, sizeof (EmpathyDispatcherPriv));
 978
 979 }
 980
 981 static void
 982 empathy_dispatcher_init (EmpathyDispatcher *dispatcher)
 983 {
 984   GList *connections, *l;
 985   EmpathyDispatcherPriv *priv = G_TYPE_INSTANCE_GET_PRIVATE (dispatcher,
 986     EMPATHY_TYPE_DISPATCHER, EmpathyDispatcherPriv);
 987
 988   dispatcher->priv = priv;
 989   priv->mc = empathy_mission_control_dup_singleton ();
 990   priv->account_manager = empathy_account_manager_dup_singleton ();
 991
 992   g_signal_connect (priv->account_manager, "new-connection",
 993     G_CALLBACK (dispatcher_new_connection_cb),
 994     dispatcher);
 995
 996   priv->connections = g_hash_table_new_full (g_direct_hash, g_direct_equal,
 997     g_object_unref, (GDestroyNotify) free_connection_data);
 998
 999   priv->outstanding_classes_requests = g_hash_table_new_full (g_direct_hash,
1000     g_direct_equal, g_object_unref, NULL);
1001
1002   priv->channels = NULL;
1003
1004   connections = empathy_account_manager_dup_connections (priv->account_manager);
1005   for (l = connections; l; l = l->next)
1006     {
1007       dispatcher_new_connection_cb (priv->account_manager, l->data, dispatcher);
1008       g_object_unref (l->data);
1009     }
1010   g_list_free (connections);
1011 }
1012
1013 EmpathyDispatcher *
1014 empathy_dispatcher_dup_singleton (void)
1015 {
1016   return EMPATHY_DISPATCHER (g_object_new (EMPATHY_TYPE_DISPATCHER, NULL));
1017 }
1018
1019 static void
1020 dispatcher_request_failed (EmpathyDispatcher *dispatcher,
1021                            DispatcherRequestData *request_data,
1022                            const GError *error)
1023 {
1024   EmpathyDispatcherPriv *priv = GET_PRIV (dispatcher);
1025   ConnectionData *conn_data;
1026
1027   conn_data = g_hash_table_lookup (priv->connections, request_data->connection);
1028   if (request_data->cb != NULL)
1029     request_data->cb (NULL, error, request_data->user_data);
1030
1031   conn_data->outstanding_requests =
1032       g_list_remove (conn_data->outstanding_requests, request_data);
1033   free_dispatcher_request_data (request_data);
1034 }
1035
1036 static void
1037 dispatcher_connection_new_requested_channel (EmpathyDispatcher *dispatcher,
1038                                              DispatcherRequestData *request_data,
1039                                              const gchar *object_path,
1040                                              GHashTable *properties,
1041                                              const GError *error)
1042 {
1043   EmpathyDispatcherPriv *priv = GET_PRIV (dispatcher);
1044   EmpathyDispatchOperation *operation = NULL;
1045   ConnectionData *conn_data;
1046
1047   conn_data = g_hash_table_lookup (priv->connections,
1048     request_data->connection);
1049
1050   if (error)
1051     {
1052       DEBUG ("Channel request failed: %s", error->message);
1053
1054       dispatcher_request_failed (dispatcher, request_data, error);
1055
1056       goto out;
1057     }
1058
1059   operation = g_hash_table_lookup (conn_data->outstanding_channels,
1060     object_path);
1061
1062   if (operation != NULL)
1063     g_hash_table_remove (conn_data->outstanding_channels, object_path);
1064   else
1065     operation = g_hash_table_lookup (conn_data->dispatching_channels,
1066         object_path);
1067
1068   if (operation == NULL)
1069     {
1070       DispatchData *data = g_hash_table_lookup (conn_data->dispatched_channels,
1071         object_path);
1072
1073       if (data != NULL)
1074         {
1075           operation = empathy_dispatch_operation_new_with_wrapper (
1076             request_data->connection,
1077             data->channel, request_data->contact, FALSE,
1078             data->channel_wrapper);
1079         }
1080       else
1081         {
1082           TpChannel *channel;
1083
1084           if (properties != NULL)
1085             channel = tp_channel_new_from_properties (request_data->connection,
1086               object_path, properties, NULL);
1087           else
1088             channel = tp_channel_new (request_data->connection, object_path,
1089               request_data->channel_type, request_data->handle_type,
1090               request_data->handle, NULL);
1091
1092           g_signal_connect (channel, "invalidated",
1093             G_CALLBACK (dispatcher_channel_invalidated_cb),
1094             request_data->dispatcher);
1095
1096           priv->channels = g_list_prepend (priv->channels, channel);
1097
1098           operation = empathy_dispatch_operation_new (request_data->connection,
1099              channel, request_data->contact, FALSE);
1100           g_object_unref (channel);
1101         }
1102     }
1103   else
1104     {
1105       /* Already existed set potential extra information */
1106       g_object_set (G_OBJECT (operation),
1107         "contact", request_data->contact,
1108         NULL);
1109     }
1110
1111   request_data->operation = operation;
1112
1113   /* (pre)-approve this right away as we requested it
1114    * This might cause the channel to be claimed, in which case the operation
1115    * will disappear. So ref it, and check the status before starting the
1116    * dispatching */
1117
1118   g_object_ref (operation);
1119   empathy_dispatch_operation_approve (operation);
1120
1121    if (empathy_dispatch_operation_get_status (operation) <
1122      EMPATHY_DISPATCHER_OPERATION_STATE_APPROVING)
1123       dispatcher_start_dispatching (request_data->dispatcher, operation,
1124           conn_data);
1125
1126   g_object_unref (operation);
1127
1128 out:
1129   dispatcher_flush_outstanding_operations (request_data->dispatcher,
1130     conn_data);
1131 }
1132
1133 static void
1134 dispatcher_request_channel_cb (TpConnection *connection,
1135                                const gchar  *object_path,
1136                                const GError *error,
1137                                gpointer user_data,
1138                                GObject *weak_object)
1139 {
1140   EmpathyDispatcher *dispatcher = EMPATHY_DISPATCHER (weak_object);
1141   DispatcherRequestData *request_data = (DispatcherRequestData *) user_data;
1142
1143   dispatcher_connection_new_requested_channel (dispatcher,
1144     request_data, object_path, NULL, error);
1145 }
1146
1147 static void
1148 dispatcher_request_channel (DispatcherRequestData *request_data)
1149 {
1150   tp_cli_connection_call_request_channel (request_data->connection, -1,
1151     request_data->channel_type,
1152     request_data->handle_type,
1153     request_data->handle,
1154     TRUE, dispatcher_request_channel_cb,
1155     request_data, NULL, G_OBJECT (request_data->dispatcher));
1156 }
1157
1158 void
1159 empathy_dispatcher_chat_with_contact (EmpathyContact *contact,
1160                                       EmpathyDispatcherRequestCb *callback,
1161                                       gpointer user_data)
1162 {
1163   EmpathyDispatcher *dispatcher;
1164   EmpathyDispatcherPriv *priv;
1165   TpConnection *connection;
1166   ConnectionData *connection_data;
1167   DispatcherRequestData *request_data;
1168
1169   g_return_if_fail (EMPATHY_IS_CONTACT (contact));
1170
1171   dispatcher = empathy_dispatcher_dup_singleton ();
1172   priv = GET_PRIV (dispatcher);
1173
1174   connection = empathy_contact_get_connection (contact);
1175   connection_data = g_hash_table_lookup (priv->connections, connection);
1176
1177   /* The contact handle might not be known yet */
1178   request_data  = new_dispatcher_request_data (dispatcher, connection,
1179     TP_IFACE_CHANNEL_TYPE_TEXT, TP_HANDLE_TYPE_CONTACT,
1180     empathy_contact_get_handle (contact), NULL, contact, callback, user_data);
1181
1182   connection_data->outstanding_requests = g_list_prepend
1183     (connection_data->outstanding_requests, request_data);
1184
1185   dispatcher_request_channel (request_data);
1186
1187   g_object_unref (dispatcher);
1188 }
1189
1190 typedef struct
1191 {
1192   EmpathyDispatcher *dispatcher;
1193   EmpathyDispatcherRequestCb *callback;
1194   gpointer user_data;
1195 } ChatWithContactIdData;
1196
1197 static void
1198 dispatcher_chat_with_contact_id_cb (EmpathyTpContactFactory *factory,
1199                                     EmpathyContact          *contact,
1200                                     const GError            *error,
1201                                     gpointer                 user_data,
1202                                     GObject                 *weak_object)
1203 {
1204   ChatWithContactIdData *data = user_data;
1205
1206   if (error)
1207     {
1208       /* FIXME: Should call data->callback with the error */
1209       DEBUG ("Error: %s", error->message);
1210     }
1211   else
1212     {
1213       empathy_dispatcher_chat_with_contact (contact, data->callback, data->user_data);
1214     }
1215
1216   g_object_unref (data->dispatcher);
1217   g_slice_free (ChatWithContactIdData, data);
1218 }
1219
1220 void
1221 empathy_dispatcher_chat_with_contact_id (TpConnection *connection,
1222                                          const gchar *contact_id,
1223                                          EmpathyDispatcherRequestCb *callback,
1224                                          gpointer user_data)
1225 {
1226   EmpathyDispatcher *dispatcher;
1227   EmpathyTpContactFactory *factory;
1228   ChatWithContactIdData *data;
1229
1230   g_return_if_fail (TP_IS_CONNECTION (connection));
1231   g_return_if_fail (!EMP_STR_EMPTY (contact_id));
1232
1233   dispatcher = empathy_dispatcher_dup_singleton ();
1234   factory = empathy_tp_contact_factory_dup_singleton (connection);
1235   data = g_slice_new0 (ChatWithContactIdData);
1236   data->dispatcher = dispatcher;
1237   data->callback = callback;
1238   data->user_data = user_data;
1239   empathy_tp_contact_factory_get_from_id (factory, contact_id,
1240       dispatcher_chat_with_contact_id_cb, data, NULL, NULL);
1241
1242   g_object_unref (factory);
1243 }
1244
1245 static void
1246 dispatcher_request_handles_cb (TpConnection *connection,
1247                                const GArray *handles,
1248                                const GError *error,
1249                                gpointer user_data,
1250                                GObject *object)
1251 {
1252   DispatcherRequestData *request_data = (DispatcherRequestData *) user_data;
1253
1254   if (error != NULL)
1255     {
1256       EmpathyDispatcher *dispatcher = EMPATHY_DISPATCHER (object);
1257       EmpathyDispatcherPriv *priv = GET_PRIV (dispatcher);
1258       ConnectionData *cd;
1259
1260       cd = g_hash_table_lookup (priv->connections, request_data->connection);
1261
1262       if (request_data->cb)
1263         request_data->cb (NULL, error, request_data->user_data);
1264
1265       cd->outstanding_requests = g_list_remove (cd->outstanding_requests,
1266         request_data);
1267
1268       free_dispatcher_request_data (request_data);
1269
1270       dispatcher_flush_outstanding_operations (dispatcher, cd);
1271       return;
1272     }
1273
1274   request_data->handle = g_array_index (handles, guint, 0);
1275   dispatcher_request_channel (request_data);
1276 }
1277
1278 void
1279 empathy_dispatcher_join_muc (TpConnection *connection,
1280                              const gchar *roomname,
1281                              EmpathyDispatcherRequestCb *callback,
1282                              gpointer user_data)
1283 {
1284   EmpathyDispatcher *dispatcher;
1285   EmpathyDispatcherPriv *priv;
1286   DispatcherRequestData *request_data;
1287   ConnectionData *connection_data;
1288   const gchar *names[] = { roomname, NULL };
1289
1290   g_return_if_fail (TP_IS_CONNECTION (connection));
1291   g_return_if_fail (!EMP_STR_EMPTY (roomname));
1292
1293   dispatcher = empathy_dispatcher_dup_singleton ();
1294   priv = GET_PRIV (dispatcher);
1295
1296   connection_data = g_hash_table_lookup (priv->connections, connection);
1297
1298   /* Don't know the room handle yet */
1299   request_data  = new_dispatcher_request_data (dispatcher, connection,
1300     TP_IFACE_CHANNEL_TYPE_TEXT, TP_HANDLE_TYPE_ROOM, 0, NULL,
1301     NULL, callback, user_data);
1302
1303   connection_data->outstanding_requests = g_list_prepend
1304     (connection_data->outstanding_requests, request_data);
1305
1306   tp_cli_connection_call_request_handles (connection, -1,
1307     TP_HANDLE_TYPE_ROOM, names,
1308     dispatcher_request_handles_cb, request_data, NULL,
1309     G_OBJECT (dispatcher));
1310
1311   g_object_unref (dispatcher);
1312 }
1313
1314 static void
1315 dispatcher_create_channel_cb (TpConnection *connect,
1316                               const gchar *object_path,
1317                               GHashTable *properties,
1318                               const GError *error,
1319                               gpointer user_data,
1320                               GObject *weak_object)
1321 {
1322   EmpathyDispatcher *dispatcher = EMPATHY_DISPATCHER (weak_object);
1323   DispatcherRequestData *request_data = (DispatcherRequestData *) user_data;
1324
1325   dispatcher_connection_new_requested_channel (dispatcher,
1326     request_data, object_path, properties, error);
1327 }
1328
1329 void
1330 empathy_dispatcher_create_channel (EmpathyDispatcher *dispatcher,
1331                                    TpConnection *connection,
1332                                    GHashTable *request,
1333                                    EmpathyDispatcherRequestCb *callback,
1334                                    gpointer user_data)
1335 {
1336   EmpathyDispatcherPriv *priv = GET_PRIV (dispatcher);
1337   ConnectionData *connection_data;
1338   DispatcherRequestData *request_data;
1339   const gchar *channel_type;
1340   guint handle_type;
1341   guint handle;
1342   gboolean valid;
1343
1344   g_return_if_fail (EMPATHY_IS_DISPATCHER (dispatcher));
1345   g_return_if_fail (TP_IS_CONNECTION (connection));
1346   g_return_if_fail (request != NULL);
1347
1348   connection_data = g_hash_table_lookup (priv->connections, connection);
1349   g_assert (connection_data != NULL);
1350
1351   channel_type = tp_asv_get_string (request, TP_IFACE_CHANNEL ".ChannelType");
1352
1353   handle_type = tp_asv_get_uint32 (request,
1354     TP_IFACE_CHANNEL ".TargetHandleType", &valid);
1355   if (!valid)
1356     handle_type = TP_UNKNOWN_HANDLE_TYPE;
1357
1358   handle = tp_asv_get_uint32 (request, TP_IFACE_CHANNEL ".TargetHandle", NULL);
1359
1360   request_data  = new_dispatcher_request_data (dispatcher, connection,
1361     channel_type, handle_type, handle, request,
1362     NULL, callback, user_data);
1363
1364   connection_data->outstanding_requests = g_list_prepend
1365     (connection_data->outstanding_requests, request_data);
1366
1367   tp_cli_connection_interface_requests_call_create_channel (
1368     request_data->connection, -1,
1369     request_data->request, dispatcher_create_channel_cb, request_data, NULL,
1370     G_OBJECT (request_data->dispatcher));
1371 }
1372
1373 GStrv
1374 empathy_dispatcher_find_channel_class (EmpathyDispatcher *dispatcher,
1375                                        TpConnection *connection,
1376                                        const gchar *channel_type,
1377                                        guint handle_type)
1378 {
1379   EmpathyDispatcherPriv *priv = GET_PRIV (dispatcher);
1380   ConnectionData *cd;
1381   int i;
1382   GPtrArray *classes;
1383
1384   g_return_val_if_fail (channel_type != NULL, NULL);
1385   g_return_val_if_fail (handle_type != 0, NULL);
1386
1387   cd = g_hash_table_lookup (priv->connections, connection);
1388
1389   if (cd == NULL)
1390     return NULL;
1391
1392   classes = cd->requestable_channels;
1393   if (classes == NULL)
1394     return NULL;
1395
1396   for (i = 0; i < classes->len; i++)
1397     {
1398       GValueArray *class;
1399       GValue *fixed;
1400       GValue *allowed;
1401       GHashTable *fprops;
1402       const gchar *c_type;
1403       guint32 h_type;
1404       gboolean valid;
1405
1406       class = g_ptr_array_index (classes, i);
1407       fixed = g_value_array_get_nth (class, 0);
1408
1409       fprops = g_value_get_boxed (fixed);
1410       c_type = tp_asv_get_string (fprops, TP_IFACE_CHANNEL ".ChannelType");
1411
1412       if (tp_strdiff (channel_type, c_type))
1413         continue;
1414
1415       h_type = tp_asv_get_uint32 (fprops,
1416         TP_IFACE_CHANNEL ".TargetHandleType", &valid);
1417
1418       if (!valid || handle_type != h_type)
1419         continue;
1420
1421       allowed = g_value_array_get_nth (class, 1);
1422
1423       return g_value_get_boxed (allowed);
1424     }
1425
1426   return NULL;
1427 }
1428
1429 static gboolean
1430 find_channel_class_idle_cb (gpointer user_data)
1431 {
1432   GStrv retval;
1433   GList *requests;
1434   FindChannelRequest *request = user_data;
1435   ConnectionData *cd;
1436   gboolean is_ready = TRUE;
1437   EmpathyDispatcherPriv *priv = GET_PRIV (request->dispatcher);
1438
1439   cd = g_hash_table_lookup (priv->connections, request->connection);
1440
1441   if (cd == NULL)
1442     is_ready = FALSE;
1443   else if (cd->requestable_channels == NULL)
1444     is_ready = FALSE;
1445
1446   if (is_ready)
1447     {
1448       retval = empathy_dispatcher_find_channel_class (request->dispatcher,
1449           request->connection, request->channel_type, request->handle_type);
1450
1451       request->callback (retval, request->user_data);
1452       free_find_channel_request (request);
1453       return FALSE;
1454     }
1455
1456   requests = g_hash_table_lookup (priv->outstanding_classes_requests,
1457       request->connection);
1458   requests = g_list_prepend (requests, request);
1459
1460   g_hash_table_insert (priv->outstanding_classes_requests,
1461       request->connection, requests);
1462
1463   return FALSE;
1464 }
1465
1466 void
1467 empathy_dispatcher_find_channel_class_async (EmpathyDispatcher *dispatcher,
1468                                              TpConnection *connection,
1469                                              const gchar *channel_type,
1470                                              guint handle_type,
1471                                              EmpathyDispatcherFindChannelClassCb callback,
1472                                              gpointer user_data)
1473 {
1474   FindChannelRequest *request;
1475
1476   g_return_if_fail (EMPATHY_IS_DISPATCHER (dispatcher));
1477   g_return_if_fail (TP_IS_CONNECTION (connection));
1478   g_return_if_fail (channel_type != NULL);
1479   g_return_if_fail (handle_type != 0);
1480
1481   /* append another request for this connection */
1482   request = g_slice_new0 (FindChannelRequest);
1483   request->dispatcher = dispatcher;
1484   request->channel_type = g_strdup (channel_type);
1485   request->handle_type = handle_type;
1486   request->connection = connection;
1487   request->callback = callback;
1488   request->user_data = user_data;
1489
1490   g_idle_add (find_channel_class_idle_cb, request);
1491 }