src/empathy-call-observer.c

   1 /*
   2  * Copyright (C) 2011 Collabora Ltd.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  *
  18  * Authors: Emilio Pozuelo Monfort <emilio.pozuelo@collabora.co.uk>
  19  */
  20
  21 #include <config.h>
  22
  23 #include <glib/gi18n-lib.h>
  24
  25 #include <telepathy-glib/telepathy-glib.h>
  26
  27 #include <telepathy-yell/telepathy-yell.h>
  28
  29 #include <libnotify/notification.h>
  30
  31 #include <libempathy/empathy-utils.h>
  32
  33 #include <libempathy-gtk/empathy-images.h>
  34 #include <libempathy-gtk/empathy-notify-manager.h>
  35
  36 #include <extensions/extensions.h>
  37
  38 #include "empathy-call-observer.h"
  39
  40 #define DEBUG_FLAG EMPATHY_DEBUG_VOIP
  41 #include <libempathy/empathy-debug.h>
  42
  43 struct _EmpathyCallObserverPriv {
  44   EmpathyNotifyManager *notify_mgr;
  45
  46   TpBaseClient *observer;
  47
  48   /* Ongoing calls, as reffed TpChannels */
  49   GList *channels;
  50 };
  51
  52 /* The Call Observer looks at incoming and outgoing calls, and
  53  * autorejects incoming ones if there are ongoing ones, since
  54  * we don't cope with simultaneous calls quite well yet.
  55  * At some point, we should ask the user if he wants to put the
  56  * current call on hold and answer the incoming one instead,
  57  * see https://bugzilla.gnome.org/show_bug.cgi?id=623348
  58  */
  59 G_DEFINE_TYPE (EmpathyCallObserver, empathy_call_observer, G_TYPE_OBJECT);
  60
  61 static EmpathyCallObserver * observer_singleton = NULL;
  62
  63 static void
  64 on_channel_closed (TpProxy *proxy,
  65     guint    domain,
  66     gint     code,
  67     gchar   *message,
  68     EmpathyCallObserver *self)
  69 {
  70   DEBUG ("channel %s has been invalidated; stop observing it",
  71       tp_proxy_get_object_path (proxy));
  72
  73   self->priv->channels = g_list_remove (self->priv->channels, proxy);
  74   g_object_unref (proxy);
  75 }
  76
  77 typedef struct
  78 {
  79   EmpathyCallObserver *self;
  80   TpObserveChannelsContext *context;
  81   TpChannel *main_channel;
  82 } AutoRejectCtx;
  83
  84 static AutoRejectCtx *
  85 auto_reject_ctx_new (EmpathyCallObserver *self,
  86     TpObserveChannelsContext *context,
  87     TpChannel *main_channel)
  88 {
  89   AutoRejectCtx *ctx = g_slice_new (AutoRejectCtx);
  90
  91   ctx->self = g_object_ref (self);
  92   ctx->context = g_object_ref (context);
  93   ctx->main_channel = g_object_ref (main_channel);
  94   return ctx;
  95 }
  96
  97 static void
  98 auto_reject_ctx_free (AutoRejectCtx *ctx)
  99 {
 100   g_object_unref (ctx->self);
 101   g_object_unref (ctx->context);
 102   g_object_unref (ctx->main_channel);
 103   g_slice_free (AutoRejectCtx, ctx);
 104 }
 105
 106 static void
 107 get_contact_cb (TpConnection *connection,
 108     guint n_contacts,
 109     TpContact * const *contacts,
 110     guint n_failed,
 111     const TpHandle *failed,
 112     const GError *error,
 113     gpointer user_data,
 114     GObject *weak_object)
 115 {
 116   EmpathyCallObserver *self = (EmpathyCallObserver *) weak_object;
 117   NotifyNotification *notification;
 118   TpContact *contact;
 119   gchar *summary, *body;
 120   EmpathyContact *emp_contact;
 121   GdkPixbuf *pixbuf;
 122
 123   if (n_contacts != 1)
 124     {
 125       DEBUG ("Failed to get TpContact; ignoring notification bubble");
 126       return;
 127     }
 128
 129   contact = contacts[0];
 130
 131   summary = g_strdup_printf (_("Missed call from %s"),
 132       tp_contact_get_alias (contact));
 133   body = g_strdup_printf (
 134       _("%s just tried to call you, but you were in another call."),
 135       tp_contact_get_alias (contact));
 136
 137   notification = notify_notification_new (summary, body, NULL);
 138
 139   emp_contact = empathy_contact_dup_from_tp_contact (contact);
 140   pixbuf = empathy_notify_manager_get_pixbuf_for_notification (
 141       self->priv->notify_mgr, emp_contact, EMPATHY_IMAGE_AVATAR_DEFAULT);
 142
 143   if (pixbuf != NULL)
 144     {
 145       notify_notification_set_icon_from_pixbuf (notification, pixbuf);
 146       g_object_unref (pixbuf);
 147     }
 148
 149   notify_notification_show (notification, NULL);
 150
 151   g_object_unref (notification);
 152   g_free (summary);
 153   g_free (body);
 154   g_object_unref (emp_contact);
 155 }
 156
 157 static void
 158 display_reject_notification (EmpathyCallObserver *self,
 159     TpChannel *channel)
 160 {
 161   TpHandle handle;
 162   TpContactFeature features[] = { TP_CONTACT_FEATURE_ALIAS,
 163       TP_CONTACT_FEATURE_AVATAR_DATA };
 164
 165   handle = tp_channel_get_handle (channel, NULL);
 166
 167   tp_connection_get_contacts_by_handle (tp_channel_borrow_connection (channel),
 168       1, &handle, G_N_ELEMENTS (features), features, get_contact_cb,
 169       g_object_ref (channel), g_object_unref, G_OBJECT (self));
 170 }
 171
 172 static TpChannel *
 173 find_main_channel (GList *channels)
 174 {
 175   GList *l;
 176
 177   for (l = channels; l != NULL; l = g_list_next (l))
 178     {
 179       TpChannel *channel = l->data;
 180       GQuark channel_type;
 181
 182       if (tp_proxy_get_invalidated (channel) != NULL)
 183         continue;
 184
 185       channel_type = tp_channel_get_channel_type_id (channel);
 186
 187       if (channel_type == TP_IFACE_QUARK_CHANNEL_TYPE_STREAMED_MEDIA ||
 188           channel_type == TPY_IFACE_QUARK_CHANNEL_TYPE_CALL)
 189         return channel;
 190     }
 191
 192   return NULL;
 193 }
 194
 195 static gboolean
 196 has_ongoing_calls (EmpathyCallObserver *self)
 197 {
 198   GList *l;
 199
 200   for (l = self->priv->channels; l != NULL; l = l->next)
 201     {
 202       TpChannel *channel = TP_CHANNEL (l->data);
 203       GQuark type = tp_channel_get_channel_type_id (channel);
 204
 205       /* Check that Call channels are not ended */
 206       if (type == TPY_IFACE_QUARK_CHANNEL_TYPE_CALL &&
 207           tpy_call_channel_get_state (TPY_CALL_CHANNEL (channel), NULL, NULL)
 208                == TPY_CALL_STATE_ENDED)
 209         continue;
 210
 211       return TRUE;
 212     }
 213
 214   return FALSE;
 215 }
 216
 217 static void
 218 claim_and_leave_cb (GObject *source,
 219     GAsyncResult *result,
 220     gpointer user_data)
 221 {
 222   AutoRejectCtx *ctx = user_data;
 223   GError *error = NULL;
 224
 225   if (!tp_channel_dispatch_operation_leave_channels_finish (
 226         TP_CHANNEL_DISPATCH_OPERATION (source), result, &error))
 227     {
 228       DEBUG ("Failed to reject call: %s", error->message);
 229
 230       g_error_free (error);
 231       goto out;
 232     }
 233
 234   display_reject_notification (ctx->self, ctx->main_channel);
 235
 236 out:
 237   auto_reject_ctx_free (ctx);
 238 }
 239
 240 static void
 241 observe_channels (TpSimpleObserver *observer,
 242     TpAccount *account,
 243     TpConnection *connection,
 244     GList *channels,
 245     TpChannelDispatchOperation *dispatch_operation,
 246     GList *requests,
 247     TpObserveChannelsContext *context,
 248     gpointer user_data)
 249 {
 250   EmpathyCallObserver *self = EMPATHY_CALL_OBSERVER (user_data);
 251   TpChannel *channel;
 252   const GError *error;
 253
 254   channel = find_main_channel (channels);
 255   if (channel == NULL)
 256     {
 257       GError err = { TP_ERRORS, TP_ERROR_INVALID_ARGUMENT,
 258           "Unknown channel type" };
 259
 260       DEBUG ("Didn't find any Call or StreamedMedia channel; ignoring");
 261
 262       tp_observe_channels_context_fail (context, &err);
 263       return;
 264     }
 265
 266   /* Autoreject if there are other ongoing calls */
 267   if (has_ongoing_calls (self))
 268     {
 269       AutoRejectCtx *ctx = auto_reject_ctx_new (self, context, channel);
 270
 271       DEBUG ("Autorejecting incoming call since there are others in "
 272           "progress: %s", tp_proxy_get_object_path (channel));
 273
 274       tp_channel_dispatch_operation_leave_channels_async (dispatch_operation,
 275           TP_CHANNEL_GROUP_CHANGE_REASON_BUSY, "Already in a call",
 276           claim_and_leave_cb, ctx);
 277
 278       tp_observe_channels_context_accept (context);
 279       return;
 280     }
 281
 282   if ((error = tp_proxy_get_invalidated (channel)) != NULL)
 283     {
 284       DEBUG ("The channel has already been invalidated: %s",
 285           error->message);
 286
 287       tp_observe_channels_context_fail (context, error);
 288       return;
 289     }
 290
 291   DEBUG ("Observing channel %s", tp_proxy_get_object_path (channel));
 292
 293   tp_g_signal_connect_object (channel, "invalidated",
 294       G_CALLBACK (on_channel_closed), self, 0);
 295   self->priv->channels = g_list_prepend (self->priv->channels,
 296       g_object_ref (channel));
 297
 298   tp_observe_channels_context_accept (context);
 299 }
 300
 301 static GObject *
 302 observer_constructor (GType type,
 303     guint n_props,
 304     GObjectConstructParam *props)
 305 {
 306   GObject *retval;
 307
 308   if (observer_singleton)
 309     {
 310       retval = g_object_ref (observer_singleton);
 311     }
 312   else
 313     {
 314       retval = G_OBJECT_CLASS (empathy_call_observer_parent_class)->constructor
 315           (type, n_props, props);
 316
 317       observer_singleton = EMPATHY_CALL_OBSERVER (retval);
 318       g_object_add_weak_pointer (retval, (gpointer) &observer_singleton);
 319     }
 320
 321   return retval;
 322 }
 323
 324 static void
 325 observer_dispose (GObject *object)
 326 {
 327   EmpathyCallObserver *self = EMPATHY_CALL_OBSERVER (object);
 328
 329   tp_clear_object (&self->priv->notify_mgr);
 330   tp_clear_object (&self->priv->observer);
 331   g_list_free_full (self->priv->channels, g_object_unref);
 332   self->priv->channels = NULL;
 333 }
 334
 335 static void
 336 empathy_call_observer_class_init (EmpathyCallObserverClass *klass)
 337 {
 338   GObjectClass *object_class = G_OBJECT_CLASS (klass);
 339
 340   object_class->dispose = observer_dispose;
 341   object_class->constructor = observer_constructor;
 342
 343   g_type_class_add_private (object_class, sizeof (EmpathyCallObserverPriv));
 344 }
 345
 346 static void
 347 empathy_call_observer_init (EmpathyCallObserver *self)
 348 {
 349   EmpathyCallObserverPriv *priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
 350     EMPATHY_TYPE_CALL_OBSERVER, EmpathyCallObserverPriv);
 351   TpAccountManager *am;
 352   GError *error = NULL;
 353
 354   self->priv = priv;
 355
 356   self->priv->notify_mgr = empathy_notify_manager_dup_singleton ();
 357
 358   am = tp_account_manager_dup ();
 359
 360   self->priv->observer = tp_simple_observer_new_with_am (am, TRUE,
 361       "Empathy.CallObserver", FALSE,
 362       observe_channels, self, NULL);
 363
 364   /* Observe Call and StreamedMedia channels */
 365   tp_base_client_take_observer_filter (self->priv->observer,
 366       tp_asv_new (
 367         TP_PROP_CHANNEL_CHANNEL_TYPE, G_TYPE_STRING,
 368           TP_IFACE_CHANNEL_TYPE_STREAMED_MEDIA,
 369         TP_PROP_CHANNEL_TARGET_HANDLE_TYPE, G_TYPE_UINT,
 370           TP_HANDLE_TYPE_CONTACT,
 371         NULL));
 372   tp_base_client_take_observer_filter (self->priv->observer,
 373       tp_asv_new (
 374         TP_PROP_CHANNEL_CHANNEL_TYPE, G_TYPE_STRING,
 375           TPY_IFACE_CHANNEL_TYPE_CALL,
 376         TP_PROP_CHANNEL_TARGET_HANDLE_TYPE, G_TYPE_UINT,
 377           TP_HANDLE_TYPE_CONTACT,
 378         NULL));
 379
 380   tp_base_client_set_observer_delay_approvers (self->priv->observer, TRUE);
 381
 382   if (!tp_base_client_register (self->priv->observer, &error))
 383     {
 384       DEBUG ("Failed to register observer: %s", error->message);
 385       g_error_free (error);
 386     }
 387
 388   g_object_unref (am);
 389 }
 390
 391 EmpathyCallObserver *
 392 empathy_call_observer_dup_singleton (void)
 393 {
 394   return g_object_new (EMPATHY_TYPE_CALL_OBSERVER, NULL);
 395 }