path: root/libempathy/empathy-contact.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * Copyright (C) 2004 Imendio AB
 * Copyright (C) 2007-2008 Collabora Ltd.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program 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
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * Authors: Mikael Hallendal <micke@imendio.com>
 *          Martyn Russell <martyn@imendio.com>
 *          Xavier Claessens <xclaesse@gmail.com>
 */

#include "config.h"

#include <string.h>

#include <glib/gi18n.h>

#include <telepathy-glib/util.h>

#include "empathy-contact.h"
#include "empathy-utils.h"
#include "empathy-enum-types.h"

#define DEBUG_FLAG EMPATHY_DEBUG_CONTACT
#include "empathy-debug.h"

#define GET_PRIV(obj) EMPATHY_GET_PRIV (obj, EmpathyContact)
typedef struct {
    gchar              *id;
    gchar              *name;
    EmpathyAvatar      *avatar;
    McAccount          *account;
    McPresence          presence;
    gchar              *presence_message;
    guint               handle;
    EmpathyCapabilities capabilities;
    gboolean            is_user;
    guint               hash;
    EmpathyContactReady ready;
} EmpathyContactPriv;

static void contact_finalize           (GObject             *object);
static void contact_get_property       (GObject             *object,
                        guint                param_id,
                        GValue              *value,
                        GParamSpec          *pspec);
static void contact_set_property       (GObject             *object,
                        guint                param_id,
                        const GValue        *value,
                        GParamSpec          *pspec);

G_DEFINE_TYPE (EmpathyContact, empathy_contact, G_TYPE_OBJECT);

enum {
    PROP_0,
    PROP_ID,
    PROP_NAME,
    PROP_AVATAR,
    PROP_ACCOUNT,
    PROP_PRESENCE,
    PROP_PRESENCE_MESSAGE,
    PROP_HANDLE,
    PROP_CAPABILITIES,
    PROP_IS_USER,
    PROP_READY
};

static void
empathy_contact_class_init (EmpathyContactClass *class)
{
    GObjectClass *object_class;

    object_class = G_OBJECT_CLASS (class);

    object_class->finalize     = contact_finalize;
    object_class->get_property = contact_get_property;
    object_class->set_property = contact_set_property;

    g_object_class_install_property (object_class,
                     PROP_ID,
                     g_param_spec_string ("id",
                                  "Contact id",
                                  "String identifying contact",
                                  NULL,
                                  G_PARAM_READWRITE));

    g_object_class_install_property (object_class,
                     PROP_NAME,
                     g_param_spec_string ("name",
                                  "Contact Name",
                                  "The name of the contact",
                                  NULL,
                                  G_PARAM_READWRITE));

    g_object_class_install_property (object_class,
                     PROP_AVATAR,
                     g_param_spec_boxed ("avatar",
                                 "Avatar image",
                                 "The avatar image",
                                 EMPATHY_TYPE_AVATAR,
                                 G_PARAM_READWRITE));

    g_object_class_install_property (object_class,
                     PROP_ACCOUNT,
                     g_param_spec_object ("account",
                                  "Contact Account",
                                  "The account associated with the contact",
                                  MC_TYPE_ACCOUNT,
                                  G_PARAM_READWRITE));

    g_object_class_install_property (object_class,
                     PROP_PRESENCE,
                     g_param_spec_uint ("presence",
                                "Contact presence",
                                "Presence of contact",
                                MC_PRESENCE_UNSET,
                                LAST_MC_PRESENCE,
                                MC_PRESENCE_UNSET,
                                G_PARAM_READWRITE));

    g_object_class_install_property (object_class,
                     PROP_PRESENCE_MESSAGE,
                     g_param_spec_string ("presence-message",
                                  "Contact presence message",
                                  "Presence message of contact",
                                  NULL,
                                  G_PARAM_READWRITE));
    g_object_class_install_property (object_class,
                     PROP_HANDLE,
                     g_param_spec_uint ("handle",
                                "Contact Handle",
                                "The handle of the contact",
                                0,
                                G_MAXUINT,
                                0,
                                G_PARAM_READWRITE));

    g_object_class_install_property (object_class,
                     PROP_CAPABILITIES,
                     g_param_spec_flags ("capabilities",
                                 "Contact Capabilities",
                                 "Capabilities of the contact",
                                 EMPATHY_TYPE_CAPABILITIES,
                                 EMPATHY_CAPABILITIES_UNKNOWN,
                                 G_PARAM_CONSTRUCT | G_PARAM_READWRITE));

    g_object_class_install_property (object_class,
                     PROP_IS_USER,
                     g_param_spec_boolean ("is-user",
                                   "Contact is-user",
                                   "Is contact the user",
                                   FALSE,
                                   G_PARAM_READWRITE));

    g_object_class_install_property (object_class,
                     PROP_READY,
                     g_param_spec_flags ("ready",
                                 "Contact ready flags",
                                 "Flags for ready properties",
                                 EMPATHY_TYPE_CONTACT_READY,
                                 EMPATHY_CONTACT_READY_NONE,
                                 G_PARAM_READABLE));

    g_type_class_add_private (object_class, sizeof (EmpathyContactPriv));
}

static void
empathy_contact_init (EmpathyContact *contact)
{
    EmpathyContactPriv *priv = G_TYPE_INSTANCE_GET_PRIVATE (contact,
        EMPATHY_TYPE_CONTACT, EmpathyContactPriv);

    contact->priv = priv;
}

static void
contact_finalize (GObject *object)
{
    EmpathyContactPriv *priv;

    priv = GET_PRIV (object);

    DEBUG ("finalize: %p", object);

    g_free (priv->name);
    g_free (priv->id);
    g_free (priv->presence_message);

    if (priv->avatar) {
        empathy_avatar_unref (priv->avatar);
    }

    if (priv->account) {
        g_object_unref (priv->account);
    }

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

static void
contact_get_property (GObject    *object,
              guint       param_id,
              GValue     *value,
              GParamSpec *pspec)
{
    EmpathyContactPriv *priv;

    priv = GET_PRIV (object);

    switch (param_id) {
    case PROP_ID:
        g_value_set_string (value, priv->id);
        break;
    case PROP_NAME:
        g_value_set_string (value,
                    empathy_contact_get_name (EMPATHY_CONTACT (object)));
        break;
    case PROP_AVATAR:
        g_value_set_boxed (value, priv->avatar);
        break;
    case PROP_ACCOUNT:
        g_value_set_object (value, priv->account);
        break;
    case PROP_PRESENCE:
        g_value_set_uint (value, priv->presence);
        break;
    case PROP_PRESENCE_MESSAGE:
        g_value_set_string (value, priv->presence_message);
        break;
    case PROP_HANDLE:
        g_value_set_uint (value, priv->handle);
        break;
    case PROP_CAPABILITIES:
        g_value_set_flags (value, priv->capabilities);
        break;
    case PROP_IS_USER:
        g_value_set_boolean (value, priv->is_user);
        break;
    case PROP_READY:
        g_value_set_flags (value, priv->ready);
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
        break;
    };
}

static void
contact_set_property (GObject      *object,
              guint         param_id,
              const GValue *value,
              GParamSpec   *pspec)
{
    EmpathyContactPriv *priv;

    priv = GET_PRIV (object);

    switch (param_id) {
    case PROP_ID:
        empathy_contact_set_id (EMPATHY_CONTACT (object),
                       g_value_get_string (value));
        break;
    case PROP_NAME:
        empathy_contact_set_name (EMPATHY_CONTACT (object),
                     g_value_get_string (value));
        break;
    case PROP_AVATAR:
        empathy_contact_set_avatar (EMPATHY_CONTACT (object),
                       g_value_get_boxed (value));
        break;
    case PROP_ACCOUNT:
        empathy_contact_set_account (EMPATHY_CONTACT (object),
                        MC_ACCOUNT (g_value_get_object (value)));
        break;
    case PROP_PRESENCE:
        empathy_contact_set_presence (EMPATHY_CONTACT (object),
                          g_value_get_uint (value));
        break;
    case PROP_PRESENCE_MESSAGE:
        empathy_contact_set_presence_message (EMPATHY_CONTACT (object),
                              g_value_get_string (value));
        break;
    case PROP_HANDLE:
        empathy_contact_set_handle (EMPATHY_CONTACT (object),
                       g_value_get_uint (value));
        break;
    case PROP_CAPABILITIES:
        empathy_contact_set_capabilities (EMPATHY_CONTACT (object),
                          g_value_get_flags (value));
        break;
    case PROP_IS_USER:
        empathy_contact_set_is_user (EMPATHY_CONTACT (object),
                        g_value_get_boolean (value));
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
        break;
    };
}

static void
contact_set_ready_flag (EmpathyContact      *contact,
            EmpathyContactReady  flag)
{
    EmpathyContactPriv *priv = GET_PRIV (contact);

    if (!(priv->ready & flag)) {
        priv->ready |= flag;
        g_object_notify (G_OBJECT (contact), "ready");
    }
}

EmpathyContact *
empathy_contact_new (McAccount *account)
{
    return g_object_new (EMPATHY_TYPE_CONTACT,
                 "account", account,
                 NULL);
}

EmpathyContact *
empathy_contact_new_full (McAccount   *account,
              const gchar *id,
              const gchar *name)
{
    return g_object_new (EMPATHY_TYPE_CONTACT,
                 "account", account,
                 "name", name,
                 "id", id,
                 NULL);
}

const gchar *
empathy_contact_get_id (EmpathyContact *contact)
{
    EmpathyContactPriv *priv;

    g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), NULL);

    priv = GET_PRIV (contact);

    return priv->id;
}

void
empathy_contact_set_id (EmpathyContact *contact,
               const gchar   *id)
{
    EmpathyContactPriv *priv;

    g_return_if_fail (EMPATHY_IS_CONTACT (contact));
    g_return_if_fail (id != NULL);

    priv = GET_PRIV (contact);

    /* We temporally ref the contact because it could be destroyed
     * during the signal emition */
    g_object_ref (contact);
    if (tp_strdiff (id, priv->id)) {
        g_free (priv->id);
        priv->id = g_strdup (id);

        g_object_notify (G_OBJECT (contact), "id");
        if (G_STR_EMPTY (priv->name)) {
            g_object_notify (G_OBJECT (contact), "name");
        }
    }
    contact_set_ready_flag (contact, EMPATHY_CONTACT_READY_ID);

    g_object_unref (contact);
}

const gchar *
empathy_contact_get_name (EmpathyContact *contact)
{
    EmpathyContactPriv *priv;

    g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), NULL);

    priv = GET_PRIV (contact);

    if (G_STR_EMPTY (priv->name)) {
        return empathy_contact_get_id (contact);
    }

    return priv->name;
}

void
empathy_contact_set_name (EmpathyContact *contact,
             const gchar   *name)
{
    EmpathyContactPriv *priv;

    g_return_if_fail (EMPATHY_IS_CONTACT (contact));

    priv = GET_PRIV (contact);

    g_object_ref (contact);
    contact_set_ready_flag (contact, EMPATHY_CONTACT_READY_NAME);
    if (tp_strdiff (name, priv->name)) {
        g_free (priv->name);
        priv->name = g_strdup (name);
        g_object_notify (G_OBJECT (contact), "name");
    }
    g_object_unref (contact);
}

EmpathyAvatar *
empathy_contact_get_avatar (EmpathyContact *contact)
{
    EmpathyContactPriv *priv;

    g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), NULL);

    priv = GET_PRIV (contact);

    return priv->avatar;
}

void
empathy_contact_set_avatar (EmpathyContact *contact,
               EmpathyAvatar  *avatar)
{
    EmpathyContactPriv *priv;

    g_return_if_fail (EMPATHY_IS_CONTACT (contact));

    priv = GET_PRIV (contact);

    if (priv->avatar == avatar) {
        return;
    }

    if (priv->avatar) {
        empathy_avatar_unref (priv->avatar);
        priv->avatar = NULL;
    }

    if (avatar) {
        priv->avatar = empathy_avatar_ref (avatar);
    }

    g_object_notify (G_OBJECT (contact), "avatar");
}

McAccount *
empathy_contact_get_account (EmpathyContact *contact)
{
    EmpathyContactPriv *priv;

    g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), NULL);

    priv = GET_PRIV (contact);

    return priv->account;
}

void
empathy_contact_set_account (EmpathyContact *contact,
                 McAccount      *account)
{
    EmpathyContactPriv *priv;

    g_return_if_fail (EMPATHY_IS_CONTACT (contact));
    g_return_if_fail (MC_IS_ACCOUNT (account));

    priv = GET_PRIV (contact);

    if (account == priv->account) {
        return;
    }

    if (priv->account) {
        g_object_unref (priv->account);
    }
    priv->account = g_object_ref (account);

    g_object_notify (G_OBJECT (contact), "account");
}

McPresence
empathy_contact_get_presence (EmpathyContact *contact)
{
    EmpathyContactPriv *priv;

    g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), MC_PRESENCE_UNSET);

    priv = GET_PRIV (contact);

    return priv->presence;
}

void
empathy_contact_set_presence (EmpathyContact *contact,
                  McPresence      presence)
{
    EmpathyContactPriv *priv;

    g_return_if_fail (EMPATHY_IS_CONTACT (contact));

    priv = GET_PRIV (contact);

    if (presence == priv->presence) {
        return;
    }

    priv->presence = presence;

    g_object_notify (G_OBJECT (contact), "presence");
}

const gchar *
empathy_contact_get_presence_message (EmpathyContact *contact)
{
    EmpathyContactPriv *priv;

    g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), NULL);

    priv = GET_PRIV (contact);

    return priv->presence_message;
}

void
empathy_contact_set_presence_message (EmpathyContact *contact,
                      const gchar    *message)
{
    EmpathyContactPriv *priv = GET_PRIV (contact);

    g_return_if_fail (EMPATHY_IS_CONTACT (contact));

    if (!tp_strdiff (message, priv->presence_message)) {
        return;
    }

    g_free (priv->presence_message);
    priv->presence_message = g_strdup (message);

    g_object_notify (G_OBJECT (contact), "presence-message");
}

guint
empathy_contact_get_handle (EmpathyContact *contact)
{
    EmpathyContactPriv *priv;

    g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), 0);

    priv = GET_PRIV (contact);

    return priv->handle;
}

void
empathy_contact_set_handle (EmpathyContact *contact,
                guint           handle)
{
    EmpathyContactPriv *priv;

    g_return_if_fail (EMPATHY_IS_CONTACT (contact));

    priv = GET_PRIV (contact);

    g_object_ref (contact);
    contact_set_ready_flag (contact, EMPATHY_CONTACT_READY_HANDLE);
    if (handle != priv->handle) {
        priv->handle = handle;
        g_object_notify (G_OBJECT (contact), "handle");
    }
    g_object_unref (contact);
}

EmpathyCapabilities
empathy_contact_get_capabilities (EmpathyContact *contact)
{
    EmpathyContactPriv *priv;

    g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), 0);

    priv = GET_PRIV (contact);

    return priv->capabilities;
}

void
empathy_contact_set_capabilities (EmpathyContact      *contact,
                  EmpathyCapabilities  capabilities)
{
    EmpathyContactPriv *priv;

    g_return_if_fail (EMPATHY_IS_CONTACT (contact));

    priv = GET_PRIV (contact);

    if (priv->capabilities == capabilities) {
        return;
    }

    priv->capabilities = capabilities;

    g_object_notify (G_OBJECT (contact), "capabilities");
}

gboolean
empathy_contact_is_user (EmpathyContact *contact)
{
    EmpathyContactPriv *priv;

    g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), FALSE);

    priv = GET_PRIV (contact);

    return priv->is_user;
}

void
empathy_contact_set_is_user (EmpathyContact *contact,
                gboolean       is_user)
{
    EmpathyContactPriv *priv;

    g_return_if_fail (EMPATHY_IS_CONTACT (contact));

    priv = GET_PRIV (contact);

    if (priv->is_user == is_user) {
        return;
    }

    priv->is_user = is_user;

    g_object_notify (G_OBJECT (contact), "is-user");
}

gboolean
empathy_contact_is_online (EmpathyContact *contact)
{
    EmpathyContactPriv *priv;

    g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), FALSE);

    priv = GET_PRIV (contact);

    return (priv->presence > MC_PRESENCE_OFFLINE);
}

const gchar *
empathy_contact_get_status (EmpathyContact *contact)
{
    EmpathyContactPriv *priv;

    g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), "");

    priv = GET_PRIV (contact);

    if (priv->presence_message) {
        return priv->presence_message;
    }

    return empathy_presence_get_default_message (priv->presence);
}

gboolean
empathy_contact_can_voip (EmpathyContact *contact)
{
    EmpathyContactPriv *priv;

    g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), FALSE);

    priv = GET_PRIV (contact);

    return priv->capabilities & (EMPATHY_CAPABILITIES_AUDIO |
                     EMPATHY_CAPABILITIES_VIDEO);
}

EmpathyContactReady
empathy_contact_get_ready (EmpathyContact *contact)
{
    EmpathyContactPriv *priv;

    g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), FALSE);

    priv = GET_PRIV (contact);

    return priv->ready;
}

gboolean
empathy_contact_equal (gconstpointer v1,
              gconstpointer v2)
{
    McAccount   *account_a;
    McAccount   *account_b;
    const gchar *id_a;
    const gchar *id_b;

    g_return_val_if_fail (EMPATHY_IS_CONTACT (v1), FALSE);
    g_return_val_if_fail (EMPATHY_IS_CONTACT (v2), FALSE);

    account_a = empathy_contact_get_account (EMPATHY_CONTACT (v1));
    account_b = empathy_contact_get_account (EMPATHY_CONTACT (v2));

    id_a = empathy_contact_get_id (EMPATHY_CONTACT (v1));
    id_b = empathy_contact_get_id (EMPATHY_CONTACT (v2));

    return empathy_account_equal (account_a, account_b) && g_str_equal (id_a, id_b);
}

guint
empathy_contact_hash (gconstpointer key)
{
    EmpathyContactPriv *priv;

    g_return_val_if_fail (EMPATHY_IS_CONTACT (key), +1);

    priv = GET_PRIV (EMPATHY_CONTACT (key));

    if (priv->hash == 0) {
        priv->hash = empathy_account_hash (priv->account) + g_str_hash (priv->id);
    }

    return priv->hash;
}

static gboolean
contact_is_ready_func (GObject  *contact,
               gpointer  user_data)
{
    EmpathyContactPriv *priv = GET_PRIV (contact);
    EmpathyContactReady ready;

    ready = GPOINTER_TO_UINT (user_data);

  /* When the name is NULL, empathy_contact_get_name() fallback to the id.
   * When the caller want to wait the name to be ready, it also want to wait
   * the id to be ready in case of fallback. */
  if ((ready | EMPATHY_CONTACT_READY_NAME) &&
       G_STR_EMPTY (priv->name))
    {
      ready |= EMPATHY_CONTACT_READY_ID;
    }

    return (priv->ready & ready) == ready;
}

void
empathy_contact_run_until_ready (EmpathyContact      *contact,
                 EmpathyContactReady  ready,
                 GMainLoop          **loop)
{
    empathy_run_until_ready_full (contact, "notify::ready",
                      contact_is_ready_func, GUINT_TO_POINTER (ready),
                      loop);
}

static gchar *
contact_get_avatar_filename (EmpathyContact *contact,
                 const gchar    *token)
{
    EmpathyContactPriv *priv = GET_PRIV (contact);
    gchar              *avatar_path;
    gchar              *avatar_file;
    gchar              *token_escaped;
    gchar              *contact_escaped;

    if (G_STR_EMPTY (priv->id)) {
        return NULL;
    }

    contact_escaped = tp_escape_as_identifier (priv->id);
    token_escaped = tp_escape_as_identifier (token);

    avatar_path = g_build_filename (g_get_user_cache_dir (),
                    PACKAGE_NAME,
                    "avatars",
                    mc_account_get_unique_name (priv->account),
                    contact_escaped,
                    NULL);
    g_mkdir_with_parents (avatar_path, 0700);

    avatar_file = g_build_filename (avatar_path, token_escaped, NULL);

    g_free (contact_escaped);
    g_free (token_escaped);
    g_free (avatar_path);

    return avatar_file;
}

void
empathy_contact_load_avatar_data (EmpathyContact *contact,
                  const guchar   *data,
                  const gsize     len,
                  const gchar    *format,
                  const gchar    *token)
{
    EmpathyAvatar *avatar;
    gchar         *filename;
    GError        *error = NULL;

    g_return_if_fail (EMPATHY_IS_CONTACT (contact));
    g_return_if_fail (data != NULL);
    g_return_if_fail (len > 0);
    g_return_if_fail (format != NULL);
    g_return_if_fail (!G_STR_EMPTY (token));

    /* Load and set the avatar */
    avatar = empathy_avatar_new (g_memdup (data, len), len,
                     g_strdup (format),
                     g_strdup (token));
    empathy_contact_set_avatar (contact, avatar);
    empathy_avatar_unref (avatar);

    /* Save to cache if not yet in it */
    filename = contact_get_avatar_filename (contact, token);
    if (filename && !g_file_test (filename, G_FILE_TEST_EXISTS)) {
        if (!g_file_set_contents (filename, data, len, &error)) {
            DEBUG ("Failed to save avatar in cache: %s",
                error ? error->message : "No error given");
            g_clear_error (&error);
        } else {
            DEBUG ("Avatar saved to %s", filename);
        }
    }
    g_free (filename);
}

gboolean
empathy_contact_load_avatar_cache (EmpathyContact *contact,
                   const gchar    *token)
{
    EmpathyAvatar *avatar = NULL;
    gchar         *filename;
    gchar         *data = NULL;
    gsize          len;
    GError        *error = NULL;

    g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), FALSE);
    g_return_val_if_fail (!G_STR_EMPTY (token), FALSE);

    /* Load the avatar from file if it exists */
    filename = contact_get_avatar_filename (contact, token);
    if (filename && g_file_test (filename, G_FILE_TEST_EXISTS)) {
        if (!g_file_get_contents (filename, &data, &len, &error)) {
            DEBUG ("Failed to load avatar from cache: %s",
                error ? error->message : "No error given");
            g_clear_error (&error);
        }
    }

    if (data) {
        DEBUG ("Avatar loaded from %s", filename);
        avatar = empathy_avatar_new (data, len, NULL, g_strdup (token));
        empathy_contact_set_avatar (contact, avatar);
        empathy_avatar_unref (avatar);
    }

    g_free (filename);

    return data != NULL;
}

GType
empathy_avatar_get_type (void)
{
    static GType type_id = 0;

    if (!type_id) {
        type_id = g_boxed_type_register_static ("EmpathyAvatar",
                            (GBoxedCopyFunc) empathy_avatar_ref,
                            (GBoxedFreeFunc) empathy_avatar_unref);
    }

    return type_id;
}

EmpathyAvatar *
empathy_avatar_new (guchar *data,
            gsize   len,
            gchar  *format,
            gchar  *token)
{
    EmpathyAvatar *avatar;

    avatar = g_slice_new0 (EmpathyAvatar);
    avatar->data = data;
    avatar->len = len;
    avatar->format = format;
    avatar->token = token;
    avatar->refcount = 1;

    return avatar;
}

void
empathy_avatar_unref (EmpathyAvatar *avatar)
{
    g_return_if_fail (avatar != NULL);

    avatar->refcount--;
    if (avatar->refcount == 0) {
        g_free (avatar->data);
        g_free (avatar->format);
        g_free (avatar->token);
        g_slice_free (EmpathyAvatar, avatar);
    }
}

EmpathyAvatar *
empathy_avatar_ref (EmpathyAvatar *avatar)
{
    g_return_val_if_fail (avatar != NULL, NULL);

    avatar->refcount++;

    return avatar;
}