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/* * Copyright (C) 2009 Collabora Ltd.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Authors: Guillaume Desmottes <guillaume.desmottes@collabora.co.uk>
 */

#include <config.h>
#include <string.h>

#include <libnotify/notification.h>
#include <libnotify/notify.h>

#include <telepathy-glib/telepathy-glib.h>

#include <libempathy/empathy-gsettings.h>
#include <libempathy/empathy-utils.h>

#include <libempathy-gtk/empathy-ui-utils.h>

#define DEBUG_FLAG EMPATHY_DEBUG_OTHER
#include <libempathy/empathy-debug.h>

#include "empathy-notify-manager.h"

#define GET_PRIV(obj) EMPATHY_GET_PRIV (obj, EmpathyNotifyManager)

typedef struct
{
  /* owned (gchar *) => TRUE */
  GHashTable *capabilities;
  TpAccountManager *account_manager;
  GSettings *gsettings_notif;
} EmpathyNotifyManagerPriv;

G_DEFINE_TYPE (EmpathyNotifyManager, empathy_notify_manager, G_TYPE_OBJECT);

static EmpathyNotifyManager *notify_manager = NULL;

static GObject *
notify_manager_constructor (GType type,
    guint n_construct_params,
    GObjectConstructParam *construct_params)
{
  GObject *retval;

  if (notify_manager != NULL)
    return g_object_ref (notify_manager);

  retval = G_OBJECT_CLASS (empathy_notify_manager_parent_class)->constructor
    (type, n_construct_params, construct_params);

  notify_manager = EMPATHY_NOTIFY_MANAGER (retval);
  g_object_add_weak_pointer (retval, (gpointer) &notify_manager);

  return retval;
}

static void
notify_manager_dispose (GObject *object)
{
  EmpathyNotifyManagerPriv *priv = GET_PRIV (object);

  if (priv->account_manager != NULL)
    {
      g_object_unref (priv->account_manager);
      priv->account_manager = NULL;
    }

  tp_clear_object (&priv->gsettings_notif);

  G_OBJECT_CLASS (empathy_notify_manager_parent_class)->dispose (object);
}

static void
notify_manager_finalize (GObject *object)
{
  EmpathyNotifyManagerPriv *priv = GET_PRIV (object);

  g_hash_table_unref (priv->capabilities);

  G_OBJECT_CLASS (empathy_notify_manager_parent_class)->finalize (object);
}

static void
empathy_notify_manager_class_init (EmpathyNotifyManagerClass *klass)
{
  GObjectClass *object_class = G_OBJECT_CLASS (klass);

  object_class->dispose = notify_manager_dispose;
  object_class->finalize = notify_manager_finalize;
  object_class->constructor = notify_manager_constructor;

  g_type_class_add_private (object_class, sizeof (EmpathyNotifyManagerPriv));
}

static void
account_manager_prepared_cb (GObject *source_object,
    GAsyncResult *result,
    gpointer user_data)
{
  TpAccountManager *account_manager = TP_ACCOUNT_MANAGER (source_object);
  GError *error = NULL;

  if (!tp_proxy_prepare_finish (account_manager, result, &error))
    {
      DEBUG ("Failed to prepare account manager: %s", error->message);
      g_error_free (error);
      return;
    }
}

static void
empathy_notify_manager_init (EmpathyNotifyManager *self)
{
  EmpathyNotifyManagerPriv *priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
    EMPATHY_TYPE_NOTIFY_MANAGER, EmpathyNotifyManagerPriv);
  GList *list, *l;

  self->priv = priv;

  priv->gsettings_notif = g_settings_new (EMPATHY_PREFS_NOTIFICATIONS_SCHEMA);

  priv->capabilities = g_hash_table_new_full (g_str_hash, g_str_equal, g_free,
      NULL);

  /* fetch capabilities */
  list = notify_get_server_caps ();
  for (l = list; l != NULL; l = g_list_next (l))
    {
      gchar *cap = l->data;

      DEBUG ("add capability: %s", cap);
      /* owernship of the string is transfered to the hash table */
      g_hash_table_insert (priv->capabilities, cap, GUINT_TO_POINTER (TRUE));
    }
  g_list_free (list);

  priv->account_manager = tp_account_manager_dup ();

  tp_proxy_prepare_async (priv->account_manager, NULL,
      account_manager_prepared_cb, self);
}

EmpathyNotifyManager *
empathy_notify_manager_dup_singleton (void)
{
  return g_object_new (EMPATHY_TYPE_NOTIFY_MANAGER, NULL);
}

gboolean
empathy_notify_manager_has_capability (EmpathyNotifyManager *self,
    const gchar *cap)
{
  EmpathyNotifyManagerPriv *priv = GET_PRIV (self);

  return g_hash_table_lookup (priv->capabilities, cap) != NULL;
}

GdkPixbuf *
empathy_notify_manager_get_pixbuf_for_notification (EmpathyNotifyManager *self,
    EmpathyContact *contact,
    const char *icon_name)
{
  GdkPixbuf *pixbuf = NULL;

  if (contact != NULL)
    pixbuf = empathy_pixbuf_avatar_from_contact_scaled (contact, 48, 48);

  if (pixbuf == NULL)
    pixbuf = empathy_pixbuf_from_icon_name_sized (icon_name, 48);

  return pixbuf;
}

gboolean
empathy_notify_manager_notification_is_enabled  (EmpathyNotifyManager *self)
{
  EmpathyNotifyManagerPriv *priv = GET_PRIV (self);
  TpConnectionPresenceType presence;

  if (!g_settings_get_boolean (priv->gsettings_notif,
        EMPATHY_PREFS_NOTIFICATIONS_ENABLED))
    return FALSE;

  if (!tp_account_manager_is_prepared (priv->account_manager,
        TP_ACCOUNT_MANAGER_FEATURE_CORE))
    {
      DEBUG ("account manager is not ready yet; display the notification");
      return TRUE;
    }

  presence = tp_account_manager_get_most_available_presence (
      priv->account_manager,
      NULL, NULL);

  if (presence != TP_CONNECTION_PRESENCE_TYPE_AVAILABLE &&
      presence != TP_CONNECTION_PRESENCE_TYPE_UNSET)
    {
      if (g_settings_get_boolean (priv->gsettings_notif,
            EMPATHY_PREFS_NOTIFICATIONS_DISABLED_AWAY))
        return FALSE;
    }

  return TRUE;
}