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 #include "empathy-call-observer.h"
  23
  24 #include <glib/gi18n-lib.h>
  25 #include <tp-account-widgets/tpaw-images.h>
  26 #include <telepathy-glib/telepathy-glib-dbus.h>
  27
  28 #include "empathy-notify-manager.h"
  29
  30 #define DEBUG_FLAG EMPATHY_DEBUG_VOIP
  31 #include "empathy-debug.h"
  32
  33 struct _EmpathyCallObserverPriv {
  34   EmpathyNotifyManager *notify_mgr;
  35
  36   TpBaseClient *observer;
  37
  38   /* Ongoing calls, as reffed TpChannels */
  39   GList *channels;
  40 };
  41
  42 /* The Call Observer looks at incoming and outgoing calls, and
  43  * autorejects incoming ones if there are ongoing ones, since
  44  * we don't cope with simultaneous calls quite well yet.
  45  * At some point, we should ask the user if he wants to put the
  46  * current call on hold and answer the incoming one instead,
  47  * see https://bugzilla.gnome.org/show_bug.cgi?id=623348
  48  */
  49 G_DEFINE_TYPE (EmpathyCallObserver, empathy_call_observer, G_TYPE_OBJECT);
  50
  51 static EmpathyCallObserver * observer_singleton = NULL;
  52
  53 static void
  54 on_channel_closed (TpProxy *proxy,
  55     guint    domain,
  56     gint     code,
  57     gchar   *message,
  58     EmpathyCallObserver *self)
  59 {
  60   DEBUG ("channel %s has been invalidated; stop observing it",
  61       tp_proxy_get_object_path (proxy));
  62
  63   self->priv->channels = g_list_remove (self->priv->channels, proxy);
  64   g_object_unref (proxy);
  65 }
  66
  67 typedef struct
  68 {
  69   EmpathyCallObserver *self;
  70   TpObserveChannelsContext *context;
  71   TpChannel *main_channel;
  72 } AutoRejectCtx;
  73
  74 static AutoRejectCtx *
  75 auto_reject_ctx_new (EmpathyCallObserver *self,
  76     TpObserveChannelsContext *context,
  77     TpChannel *main_channel)
  78 {
  79   AutoRejectCtx *ctx = g_slice_new (AutoRejectCtx);
  80
  81   ctx->self = g_object_ref (self);
  82   ctx->context = g_object_ref (context);
  83   ctx->main_channel = g_object_ref (main_channel);
  84   return ctx;
  85 }
  86
  87 static void
  88 auto_reject_ctx_free (AutoRejectCtx *ctx)
  89 {
  90   g_object_unref (ctx->self);
  91   g_object_unref (ctx->context);
  92   g_object_unref (ctx->main_channel);
  93   g_slice_free (AutoRejectCtx, ctx);
  94 }
  95
  96 static void
  97 display_reject_notification (EmpathyCallObserver *self,
  98     TpChannel *channel)
  99 {
 100   TpContact *contact;
 101   NotifyNotification *notification;
 102   gchar *summary, *body;
 103   EmpathyContact *emp_contact;
 104   GdkPixbuf *pixbuf;
 105
 106   contact = tp_channel_get_target_contact (channel);
 107
 108   summary = g_strdup_printf (_("Missed call from %s"),
 109       tp_contact_get_alias (contact));
 110   body = g_strdup_printf (
 111       _("%s just tried to call you, but you were in another call."),
 112       tp_contact_get_alias (contact));
 113
 114   notification = empathy_notify_manager_create_notification (summary, body,
 115       NULL);
 116
 117   emp_contact = empathy_contact_dup_from_tp_contact (contact);
 118   pixbuf = empathy_notify_manager_get_pixbuf_for_notification (
 119       self->priv->notify_mgr, emp_contact, TPAW_IMAGE_AVATAR_DEFAULT);
 120
 121   if (pixbuf != NULL)
 122     {
 123       notify_notification_set_icon_from_pixbuf (notification, pixbuf);
 124       g_object_unref (pixbuf);
 125     }
 126
 127   notify_notification_show (notification, NULL);
 128
 129   g_object_unref (notification);
 130   g_free (summary);
 131   g_free (body);
 132   g_object_unref (emp_contact);
 133 }
 134
 135 static TpChannel *
 136 find_main_channel (GList *channels)
 137 {
 138   GList *l;
 139
 140   for (l = channels; l != NULL; l = g_list_next (l))
 141     {
 142       TpChannel *channel = l->data;
 143       GQuark channel_type;
 144
 145       if (tp_proxy_get_invalidated (channel) != NULL)
 146         continue;
 147
 148       channel_type = tp_channel_get_channel_type_id (channel);
 149
 150       if (channel_type == TP_IFACE_QUARK_CHANNEL_TYPE_CALL)
 151         return channel;
 152     }
 153
 154   return NULL;
 155 }
 156
 157 static gboolean
 158 has_ongoing_calls (EmpathyCallObserver *self)
 159 {
 160   GList *l;
 161
 162   for (l = self->priv->channels; l != NULL; l = l->next)
 163     {
 164       TpChannel *channel = TP_CHANNEL (l->data);
 165       GQuark type = tp_channel_get_channel_type_id (channel);
 166
 167       /* Check that Call channels are not ended */
 168       if (type == TP_IFACE_QUARK_CHANNEL_TYPE_CALL &&
 169           tp_call_channel_get_state (TP_CALL_CHANNEL (channel),
 170               NULL, NULL, NULL) == TP_CALL_STATE_ENDED)
 171         continue;
 172
 173       return TRUE;
 174     }
 175
 176   return FALSE;
 177 }
 178
 179 static void
 180 claim_and_leave_cb (GObject *source,
 181     GAsyncResult *result,
 182     gpointer user_data)
 183 {
 184   AutoRejectCtx *ctx = user_data;
 185   GError *error = NULL;
 186
 187   if (!tp_channel_dispatch_operation_leave_channels_finish (
 188         TP_CHANNEL_DISPATCH_OPERATION (source), result, &error))
 189     {
 190       DEBUG ("Failed to reject call: %s", error->message);
 191
 192       g_error_free (error);
 193       goto out;
 194     }
 195
 196   display_reject_notification (ctx->self, ctx->main_channel);
 197
 198 out:
 199   auto_reject_ctx_free (ctx);
 200 }
 201
 202 static void
 203 observe_channels (TpSimpleObserver *observer,
 204     TpAccount *account,
 205     TpConnection *connection,
 206     GList *channels,
 207     TpChannelDispatchOperation *dispatch_operation,
 208     GList *requests,
 209     TpObserveChannelsContext *context,
 210     gpointer user_data)
 211 {
 212   EmpathyCallObserver *self = EMPATHY_CALL_OBSERVER (user_data);
 213   TpChannel *channel;
 214   const GError *error;
 215
 216   channel = find_main_channel (channels);
 217   if (channel == NULL)
 218     {
 219       GError err = { TP_ERROR, TP_ERROR_INVALID_ARGUMENT,
 220           "Unknown channel type" };
 221
 222       DEBUG ("Didn't find any Call channel; ignoring");
 223
 224       tp_observe_channels_context_fail (context, &err);
 225       return;
 226     }
 227
 228   /* Autoreject if there are other ongoing calls */
 229   if (has_ongoing_calls (self))
 230     {
 231       AutoRejectCtx *ctx = auto_reject_ctx_new (self, context, channel);
 232
 233       DEBUG ("Autorejecting incoming call since there are others in "
 234           "progress: %s", tp_proxy_get_object_path (channel));
 235
 236       tp_channel_dispatch_operation_leave_channels_async (dispatch_operation,
 237           TP_CHANNEL_GROUP_CHANGE_REASON_BUSY, "Already in a call",
 238           claim_and_leave_cb, ctx);
 239
 240       tp_observe_channels_context_accept (context);
 241       return;
 242     }
 243
 244   if ((error = tp_proxy_get_invalidated (channel)) != NULL)
 245     {
 246       DEBUG ("The channel has already been invalidated: %s",
 247           error->message);
 248
 249       tp_observe_channels_context_fail (context, error);
 250       return;
 251     }
 252
 253   DEBUG ("Observing channel %s", tp_proxy_get_object_path (channel));
 254
 255   tp_g_signal_connect_object (channel, "invalidated",
 256       G_CALLBACK (on_channel_closed), self, 0);
 257   self->priv->channels = g_list_prepend (self->priv->channels,
 258       g_object_ref (channel));
 259
 260   tp_observe_channels_context_accept (context);
 261 }
 262
 263 static GObject *
 264 observer_constructor (GType type,
 265     guint n_props,
 266     GObjectConstructParam *props)
 267 {
 268   GObject *retval;
 269
 270   if (observer_singleton)
 271     {
 272       retval = g_object_ref (observer_singleton);
 273     }
 274   else
 275     {
 276       retval = G_OBJECT_CLASS (empathy_call_observer_parent_class)->constructor
 277           (type, n_props, props);
 278
 279       observer_singleton = EMPATHY_CALL_OBSERVER (retval);
 280       g_object_add_weak_pointer (retval, (gpointer) &observer_singleton);
 281     }
 282
 283   return retval;
 284 }
 285
 286 static void
 287 observer_dispose (GObject *object)
 288 {
 289   EmpathyCallObserver *self = EMPATHY_CALL_OBSERVER (object);
 290
 291   tp_clear_object (&self->priv->notify_mgr);
 292   tp_clear_object (&self->priv->observer);
 293   g_list_free_full (self->priv->channels, g_object_unref);
 294   self->priv->channels = NULL;
 295 }
 296
 297 static void
 298 empathy_call_observer_class_init (EmpathyCallObserverClass *klass)
 299 {
 300   GObjectClass *object_class = G_OBJECT_CLASS (klass);
 301
 302   object_class->dispose = observer_dispose;
 303   object_class->constructor = observer_constructor;
 304
 305   g_type_class_add_private (object_class, sizeof (EmpathyCallObserverPriv));
 306 }
 307
 308 static void
 309 empathy_call_observer_init (EmpathyCallObserver *self)
 310 {
 311   EmpathyCallObserverPriv *priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
 312     EMPATHY_TYPE_CALL_OBSERVER, EmpathyCallObserverPriv);
 313   TpAccountManager *am;
 314   GError *error = NULL;
 315
 316   self->priv = priv;
 317
 318   self->priv->notify_mgr = empathy_notify_manager_dup_singleton ();
 319
 320   am = tp_account_manager_dup ();
 321
 322   self->priv->observer = tp_simple_observer_new_with_am (am, TRUE,
 323       "Empathy.CallObserver", FALSE,
 324       observe_channels, self, NULL);
 325
 326   /* Observe Call channels */
 327   tp_base_client_take_observer_filter (self->priv->observer,
 328       tp_asv_new (
 329         TP_PROP_CHANNEL_CHANNEL_TYPE, G_TYPE_STRING,
 330           TP_IFACE_CHANNEL_TYPE_CALL,
 331         TP_PROP_CHANNEL_TARGET_HANDLE_TYPE, G_TYPE_UINT,
 332           TP_HANDLE_TYPE_CONTACT,
 333         NULL));
 334
 335   tp_base_client_set_observer_delay_approvers (self->priv->observer, TRUE);
 336
 337   if (!tp_base_client_register (self->priv->observer, &error))
 338     {
 339       DEBUG ("Failed to register observer: %s", error->message);
 340       g_error_free (error);
 341     }
 342
 343   g_object_unref (am);
 344 }
 345
 346 EmpathyCallObserver *
 347 empathy_call_observer_dup_singleton (void)
 348 {
 349   return g_object_new (EMPATHY_TYPE_CALL_OBSERVER, NULL);
 350 }