path: root/libempathy/empathy-tp-contact-factory.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * Copyright (C) 2007-2008 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: Xavier Claessens <xclaesse@gmail.com>
 */

#include <config.h>

#include <string.h>

#include <telepathy-glib/util.h>
#include <telepathy-glib/connection.h>
#include <libmissioncontrol/mission-control.h>

#include "empathy-tp-contact-factory.h"
#include "empathy-utils.h"
#include "empathy-debug.h"

#define GET_PRIV(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), \
               EMPATHY_TYPE_TP_CONTACT_FACTORY, EmpathyTpContactFactoryPriv))

#define DEBUG_DOMAIN "TpContactFactory"

struct _EmpathyTpContactFactoryPriv {
    MissionControl *mc;
    McAccount      *account;
    TpConnection   *connection;
    gboolean        ready;

    GList          *contacts;
    guint           self_handle;
};

static void empathy_tp_contact_factory_class_init (EmpathyTpContactFactoryClass *klass);
static void empathy_tp_contact_factory_init       (EmpathyTpContactFactory      *factory);

G_DEFINE_TYPE (EmpathyTpContactFactory, empathy_tp_contact_factory, G_TYPE_OBJECT);

enum {
    PROP_0,
    PROP_ACCOUNT,
};

static EmpathyContact *
tp_contact_factory_find_by_handle (EmpathyTpContactFactory *tp_factory,
                   guint                    handle)
{
    EmpathyTpContactFactoryPriv *priv = GET_PRIV (tp_factory);
    GList                       *l;

    for (l = priv->contacts; l; l = l->next) {
        if (empathy_contact_get_handle (l->data) == handle) {
            return l->data;
        }
    }

    return NULL;
}

static EmpathyContact *
tp_contact_factory_find_by_id (EmpathyTpContactFactory *tp_factory,
                   const gchar             *id)
{
    EmpathyTpContactFactoryPriv *priv = GET_PRIV (tp_factory);
    GList                       *l;

    for (l = priv->contacts; l; l = l->next) {
        if (!tp_strdiff (empathy_contact_get_id (l->data), id)) {
            return l->data;
        }
    }

    return NULL;
}

static void
tp_contact_factory_weak_notify (gpointer data,
                GObject *where_the_object_was)
{
    EmpathyTpContactFactoryPriv *priv = GET_PRIV (data);

    empathy_debug (DEBUG_DOMAIN, "Remove finalized contact %p",
               where_the_object_was);

    priv->contacts = g_list_remove (priv->contacts, where_the_object_was);
}

static void
tp_contact_factory_presences_table_foreach (const gchar    *state_str,
                        GHashTable     *presences_table,
                        EmpathyContact *contact)
{
    const GValue *message;

    empathy_contact_set_presence (contact,
                      empathy_presence_from_str (state_str));
    
    message = g_hash_table_lookup (presences_table, "message");
    if (message != NULL) {
        empathy_contact_set_presence_message (contact,
                              g_value_get_string (message));
    } else {
        empathy_contact_set_presence_message (contact, NULL);
    }
}

static void
tp_contact_factory_parse_presence_foreach (guint                    handle,
                       GValueArray             *presence_struct,
                       EmpathyTpContactFactory *tp_factory)
{
    GHashTable      *presences_table;
    EmpathyContact  *contact;

    contact = tp_contact_factory_find_by_handle (tp_factory, handle);
    if (!contact) {
        return;
    }

    presences_table = g_value_get_boxed (g_value_array_get_nth (presence_struct, 1));

    g_hash_table_foreach (presences_table,
                  (GHFunc) tp_contact_factory_presences_table_foreach,
                  contact);

    empathy_debug (DEBUG_DOMAIN, "Changing presence for contact %s (%d) to %s (%d)",
              empathy_contact_get_id (contact),
              handle,
              empathy_contact_get_presence_message (contact),
              empathy_contact_get_presence (contact));
}

static void
tp_contact_factory_get_presence_cb (TpConnection *connection,
                    GHashTable   *handle_table,
                    const GError *error,
                    gpointer      user_data,
                    GObject      *tp_factory)
{
    if (error) {
        empathy_debug (DEBUG_DOMAIN, "Error getting presence: %s",
                  error->message);
        return;
    }

    g_hash_table_foreach (handle_table,
                  (GHFunc) tp_contact_factory_parse_presence_foreach,
                  EMPATHY_TP_CONTACT_FACTORY (tp_factory));
}

static void
tp_contact_factory_presence_update_cb (TpConnection *connection,
                       GHashTable   *handle_table,
                       gpointer      user_data,
                       GObject      *tp_factory)
{
    g_hash_table_foreach (handle_table,
                  (GHFunc) tp_contact_factory_parse_presence_foreach,
                  EMPATHY_TP_CONTACT_FACTORY (tp_factory));
}

static void
tp_contact_factory_set_aliases_cb (TpConnection *connection,
                   const GError *error,
                   gpointer      user_data,
                   GObject      *tp_factory)
{
    if (error) {
        empathy_debug (DEBUG_DOMAIN, "Error setting alias: %s",
                   error->message);
    }
}

static void
tp_contact_factory_request_aliases_cb (TpConnection *connection,
                       const gchar  **contact_names,
                       const GError  *error,
                       gpointer       user_data,
                       GObject       *tp_factory)
{
    guint        *handles = user_data;
    guint         i = 0;
    const gchar **name;

    if (error) {
        empathy_debug (DEBUG_DOMAIN, "Error requesting aliases: %s",
                  error->message);
        return;
    }

    for (name = contact_names; *name; name++) {
        EmpathyContact *contact;

        contact = tp_contact_factory_find_by_handle (EMPATHY_TP_CONTACT_FACTORY (tp_factory),
                                 handles[i]);
        if (!contact) {
            continue;
        }

        empathy_debug (DEBUG_DOMAIN, "Renaming contact %s (%d) to %s (request cb)",
                   empathy_contact_get_id (contact),
                   empathy_contact_get_handle (contact),
                   *name);

        empathy_contact_set_name (contact, *name);

        i++;
    }
}

static void
tp_contact_factory_aliases_changed_cb (TpConnection    *connection,
                       const GPtrArray *renamed_handlers,
                       gpointer         user_data,
                       GObject         *weak_object)
{
    EmpathyTpContactFactory *tp_factory = EMPATHY_TP_CONTACT_FACTORY (weak_object);
    guint                    i;

    for (i = 0; renamed_handlers->len > i; i++) {
        guint           handle;
        const gchar    *alias;
        GValueArray    *renamed_struct;
        EmpathyContact *contact;

        renamed_struct = g_ptr_array_index (renamed_handlers, i);
        handle = g_value_get_uint(g_value_array_get_nth (renamed_struct, 0));
        alias = g_value_get_string(g_value_array_get_nth (renamed_struct, 1));
        contact = tp_contact_factory_find_by_handle (tp_factory, handle);

        if (!contact) {
            /* We don't know this contact, skip */
            continue;
        }

        empathy_debug (DEBUG_DOMAIN, "Renaming contact %s (%d) to %s (changed cb)",
                   empathy_contact_get_id (contact),
                   handle, alias);

        empathy_contact_set_name (contact, alias);
    }
}

static void
tp_contact_factory_set_avatar_cb (TpConnection *connection,
                  const gchar  *token,
                  const GError *error,
                  gpointer      user_data,
                  GObject      *tp_factory)
{
    if (error) {
        empathy_debug (DEBUG_DOMAIN, "Error setting avatar: %s",
                   error->message);
    }
}

static void
tp_contact_factory_clear_avatar_cb (TpConnection *connection,
                    const GError *error,
                    gpointer      user_data,
                    GObject      *tp_factory)
{
    if (error) {
        empathy_debug (DEBUG_DOMAIN, "Error clearing avatar: %s",
                   error->message);
    }
}

static void
tp_contact_factory_avatar_retrieved_cb (TpConnection *connection,
                    guint         handle,
                    const gchar  *token,
                    const GArray *avatar_data,
                    const gchar  *mime_type,
                    gpointer      user_data,
                    GObject      *tp_factory)
{
    EmpathyContact *contact;
    EmpathyAvatar  *avatar;

    contact = tp_contact_factory_find_by_handle (EMPATHY_TP_CONTACT_FACTORY (tp_factory),
                             handle);
    if (!contact) {
        return;
    }

    empathy_debug (DEBUG_DOMAIN, "Avatar retrieved for contact %s (%d)",
               empathy_contact_get_id (contact),
               handle);

    avatar = empathy_avatar_new (avatar_data->data,
                     avatar_data->len,
                     mime_type,
                     token);

    empathy_contact_set_avatar (contact, avatar);
    empathy_avatar_unref (avatar);
}

static void
tp_contact_factory_request_avatars_cb (TpConnection *connection,
                       const GError *error,
                       gpointer      user_data,
                       GObject      *tp_factory)
{
    if (error) {
        empathy_debug (DEBUG_DOMAIN, "Error requesting avatars: %s",
                   error->message);
    }
}

static gboolean
tp_contact_factory_avatar_maybe_update (EmpathyTpContactFactory *tp_factory,
                    guint                    handle,
                    const gchar             *token)
{
    EmpathyContact *contact;
    EmpathyAvatar  *avatar;

    contact = tp_contact_factory_find_by_handle (tp_factory, handle);
    if (!contact) {
        return TRUE;
    }

    /* Check if we have an avatar */
    if (G_STR_EMPTY (token)) {
        empathy_contact_set_avatar (contact, NULL);
        return TRUE;
    }

    /* Check if the avatar changed */
    avatar = empathy_contact_get_avatar (contact);
    if (avatar && !tp_strdiff (avatar->token, token)) {
        return TRUE;
    }

    /* The avatar changed, search the new one in the cache */
    avatar = empathy_avatar_new_from_cache (token);
    if (avatar) {
        /* Got from cache, use it */
        empathy_contact_set_avatar (contact, avatar);
        empathy_avatar_unref (avatar);
        return TRUE;
    }

    /* Avatar is not up-to-date, we have to request it. */
    return FALSE;
}

typedef struct {
    EmpathyTpContactFactory *tp_factory;
    GArray                  *handles;
} TokensData;

static void
tp_contact_factory_avatar_tokens_foreach (gpointer key,
                      gpointer value,
                      gpointer user_data)
{
    TokensData  *data = user_data;
    const gchar *token = value;
    guint        handle = GPOINTER_TO_UINT (key);

    if (!tp_contact_factory_avatar_maybe_update (data->tp_factory,
                             handle, token)) {
        g_array_append_val (data->handles, handle);
    }
}

static void
tp_contact_factory_get_known_avatar_tokens_cb (TpConnection *connection,
                           GHashTable   *tokens,
                           const GError *error,
                           gpointer      user_data,
                           GObject      *tp_factory)
{
    TokensData data;

    if (error) {
        empathy_debug (DEBUG_DOMAIN,
                   "Error getting known avatars tokens: %s",
                   error->message);
        return;
    }

    data.tp_factory = EMPATHY_TP_CONTACT_FACTORY (tp_factory);
    data.handles = g_array_new (FALSE, FALSE, sizeof (guint));
    g_hash_table_foreach (tokens,
                  tp_contact_factory_avatar_tokens_foreach,
                  &data);

    empathy_debug (DEBUG_DOMAIN, "Got %d tokens, need to request %d avatars",
               g_hash_table_size (tokens),
               data.handles->len);

    /* Request needed avatars */
    if (data.handles->len > 0) {
        tp_cli_connection_interface_avatars_call_request_avatars (connection,
                                      -1,
                                      data.handles,
                                      tp_contact_factory_request_avatars_cb,
                                      NULL, NULL,
                                      tp_factory);
    }

    g_array_free (data.handles, TRUE);
}

static void
tp_contact_factory_avatar_updated_cb (TpConnection *connection,
                      guint         handle,
                      const gchar  *new_token,
                      gpointer      user_data,
                      GObject      *tp_factory)
{
    GArray *handles;

    if (tp_contact_factory_avatar_maybe_update (EMPATHY_TP_CONTACT_FACTORY (tp_factory),
                            handle, new_token)) {
        /* Avatar was cached, nothing to do */
        return;
    }

    empathy_debug (DEBUG_DOMAIN, "Need to request avatar for token %s",
               new_token);

    handles = g_array_new (FALSE, FALSE, sizeof (guint));
    g_array_append_val (handles, handle);

    tp_cli_connection_interface_avatars_call_request_avatars (connection,
                                  -1,
                                  handles,
                                  tp_contact_factory_request_avatars_cb,
                                  NULL, NULL,
                                  tp_factory);
    g_array_free (handles, TRUE);
}

static void
tp_contact_factory_update_capabilities (EmpathyTpContactFactory *tp_factory,
                    guint                    handle,
                    const gchar             *channel_type,
                    guint                    generic,
                    guint                    specific)
{
    EmpathyContact      *contact;
    EmpathyCapabilities  capabilities;

    contact = tp_contact_factory_find_by_handle (tp_factory, handle);
    if (!contact) {
        return;
    }

    capabilities = empathy_contact_get_capabilities (contact);
    capabilities &= ~EMPATHY_CAPABILITIES_UNKNOWN;

    if (strcmp (channel_type, TP_IFACE_CHANNEL_TYPE_STREAMED_MEDIA) == 0) {
        capabilities &= ~EMPATHY_CAPABILITIES_AUDIO;
        capabilities &= ~EMPATHY_CAPABILITIES_VIDEO;
        if (specific & TP_CHANNEL_MEDIA_CAPABILITY_AUDIO) {
            capabilities |= EMPATHY_CAPABILITIES_AUDIO;
        }
        if (specific & TP_CHANNEL_MEDIA_CAPABILITY_VIDEO) {
            capabilities |= EMPATHY_CAPABILITIES_VIDEO;
        }
    }

    empathy_debug (DEBUG_DOMAIN, "Changing capabilities for contact %s (%d) to %d",
               empathy_contact_get_id (contact),
               empathy_contact_get_handle (contact),
               capabilities);

    empathy_contact_set_capabilities (contact, capabilities);
}

static void
tp_contact_factory_get_capabilities_cb (TpConnection    *connection,
                    const GPtrArray *capabilities,
                    const GError    *error,
                    gpointer         user_data,
                    GObject         *weak_object)
{
    EmpathyTpContactFactory *tp_factory = EMPATHY_TP_CONTACT_FACTORY (weak_object);
    guint                    i;

    if (error) {
        empathy_debug (DEBUG_DOMAIN, "Error getting capabilities: %s",
                   error->message);
        /* FIXME Should set the capabilities of the contacts for which this request
         * originated to NONE */
        return;
    }

    for (i = 0; i < capabilities->len; i++) {
        GValueArray *values;
        guint        handle;
        const gchar *channel_type;
        guint        generic;
        guint        specific;

        values = g_ptr_array_index (capabilities, i);
        handle = g_value_get_uint (g_value_array_get_nth (values, 0));
        channel_type = g_value_get_string (g_value_array_get_nth (values, 1));
        generic = g_value_get_uint (g_value_array_get_nth (values, 2));
        specific = g_value_get_uint (g_value_array_get_nth (values, 3));

        tp_contact_factory_update_capabilities (tp_factory,
                            handle,
                            channel_type,
                            generic,
                            specific);
    }
}

static void
tp_contact_factory_capabilities_changed_cb (TpConnection    *connection,
                        const GPtrArray *capabilities,
                        gpointer         user_data,
                        GObject         *weak_object)
{
    EmpathyTpContactFactory *tp_factory = EMPATHY_TP_CONTACT_FACTORY (weak_object);
    guint                    i;

    for (i = 0; i < capabilities->len; i++) {
        GValueArray *values;
        guint        handle;
        const gchar *channel_type;
        guint        generic;
        guint        specific;

        values = g_ptr_array_index (capabilities, i);
        handle = g_value_get_uint (g_value_array_get_nth (values, 0));
        channel_type = g_value_get_string (g_value_array_get_nth (values, 1));
        generic = g_value_get_uint (g_value_array_get_nth (values, 3));
        specific = g_value_get_uint (g_value_array_get_nth (values, 5));

        tp_contact_factory_update_capabilities (tp_factory,
                            handle,
                            channel_type,
                            generic,
                            specific);
    }
}

static void
tp_contact_factory_request_everything (EmpathyTpContactFactory *tp_factory,
                       const GArray            *handles)
{
    EmpathyTpContactFactoryPriv *priv = GET_PRIV (tp_factory);
    guint                       *dup_handles;

    tp_cli_connection_interface_presence_call_get_presence (priv->connection,
                                -1,
                                handles,
                                tp_contact_factory_get_presence_cb,
                                NULL, NULL,
                                G_OBJECT (tp_factory));

    dup_handles = g_memdup (handles->data, handles->len * sizeof (guint));
    tp_cli_connection_interface_aliasing_call_request_aliases (priv->connection,
                                   -1,
                                   handles,
                                   tp_contact_factory_request_aliases_cb,
                                   dup_handles, g_free,
                                   G_OBJECT (tp_factory));

    tp_cli_connection_interface_avatars_call_get_known_avatar_tokens (priv->connection,
                                      -1,
                                      handles,
                                      tp_contact_factory_get_known_avatar_tokens_cb,
                                      NULL, NULL,
                                      G_OBJECT (tp_factory));

    tp_cli_connection_interface_capabilities_call_get_capabilities (priv->connection,
                                    -1,
                                    handles,
                                    tp_contact_factory_get_capabilities_cb,
                                    NULL, NULL,
                                    G_OBJECT (tp_factory));
}

static void
tp_contact_factory_list_free (gpointer data)
{
    GList *l = data;

    g_list_foreach (l, (GFunc) g_object_unref, NULL);
    g_list_free (l);
}

static void
tp_contact_factory_request_handles_cb (TpConnection *connection,
                       const GArray *handles,
                       const GError *error,
                       gpointer      user_data,
                       GObject      *tp_factory)
{
    EmpathyTpContactFactoryPriv *priv = GET_PRIV (tp_factory);
    GList                       *contacts = user_data;
    GList                       *l;
    guint                        i = 0;

    if (error) {
        empathy_debug (DEBUG_DOMAIN, "Failed to request handles: %s",
                   error->message);
        return;
    }

    for (l = contacts; l; l = l->next) {
        guint handle;

        handle = g_array_index (handles, guint, i);
        empathy_contact_set_handle (l->data, handle);
        if (handle == priv->self_handle) {
            empathy_contact_set_is_user (l->data, TRUE);
        }

        i++;
    }

    tp_contact_factory_request_everything (EMPATHY_TP_CONTACT_FACTORY (tp_factory),
                           handles);
}

static void
tp_contact_factory_disconnect_contact_foreach (gpointer data,
                           gpointer user_data)
{
    EmpathyContact *contact = data;
    
    empathy_contact_set_presence (contact, MC_PRESENCE_UNSET);
    empathy_contact_set_handle (contact, 0);
}

static void
tp_contact_factory_connection_invalidated_cb (EmpathyTpContactFactory *tp_factory)
{
    EmpathyTpContactFactoryPriv *priv = GET_PRIV (tp_factory);

    empathy_debug (DEBUG_DOMAIN, "Connection invalidated");

    g_object_unref (priv->connection);
    priv->connection = NULL;
    priv->ready = FALSE;
    priv->self_handle = 0;

    g_list_foreach (priv->contacts,
            tp_contact_factory_disconnect_contact_foreach,
            tp_factory);
}


static void
tp_contact_factory_got_self_handle_cb (TpConnection *proxy,
                       guint         handle,
                       const GError *error,
                       gpointer      user_data,
                       GObject      *tp_factory)
{
    EmpathyTpContactFactoryPriv *priv = GET_PRIV (tp_factory);
    const gchar                **contact_ids;
    guint                        i;
    GList                       *l;

    if (error) {
        empathy_debug (DEBUG_DOMAIN, "Failed to get self handles: %s",
                   error->message);
        return;
    }

    priv->self_handle = handle;
    priv->ready = TRUE;

    /* Connect signals */
    tp_cli_connection_interface_aliasing_connect_to_aliases_changed (priv->connection,
                                     tp_contact_factory_aliases_changed_cb,
                                     NULL, NULL,
                                     G_OBJECT (tp_factory),
                                     NULL);
    tp_cli_connection_interface_avatars_connect_to_avatar_updated (priv->connection,
                                       tp_contact_factory_avatar_updated_cb,
                                       NULL, NULL,
                                       G_OBJECT (tp_factory),
                                       NULL);
    tp_cli_connection_interface_avatars_connect_to_avatar_retrieved (priv->connection,
                                     tp_contact_factory_avatar_retrieved_cb,
                                     NULL, NULL,
                                     G_OBJECT (tp_factory),
                                     NULL);
    tp_cli_connection_interface_presence_connect_to_presence_update (priv->connection,
                                     tp_contact_factory_presence_update_cb,
                                     NULL, NULL,
                                     G_OBJECT (tp_factory),
                                     NULL);
    tp_cli_connection_interface_capabilities_connect_to_capabilities_changed (priv->connection,
                                          tp_contact_factory_capabilities_changed_cb,
                                          NULL, NULL,
                                          G_OBJECT (tp_factory),
                                          NULL);

    /* Request new handles for all contacts */
    if (priv->contacts) {
        GList *contacts;

        contacts = g_list_copy (priv->contacts);
        g_list_foreach (contacts, (GFunc) g_object_ref, NULL);

        i = g_list_length (contacts);
        contact_ids = g_new0 (const gchar*, i + 1);
        i = 0;
        for (l = contacts; l; l = l->next) {
            contact_ids[i] = empathy_contact_get_id (l->data);
            i++;
        }

        tp_cli_connection_call_request_handles (priv->connection,
                            -1,
                            TP_HANDLE_TYPE_CONTACT,
                            contact_ids,
                            tp_contact_factory_request_handles_cb,
                            contacts, tp_contact_factory_list_free,
                            G_OBJECT (tp_factory));
        g_free (contact_ids);
    }
}

static void
tp_contact_factory_connection_ready_cb (EmpathyTpContactFactory *tp_factory)
{
    EmpathyTpContactFactoryPriv *priv = GET_PRIV (tp_factory);

    /* Get our own handle */
    tp_cli_connection_call_get_self_handle (priv->connection,
                        -1,
                        tp_contact_factory_got_self_handle_cb,
                        NULL, NULL,
                        G_OBJECT (tp_factory));
}

static void
tp_contact_factory_status_updated (EmpathyTpContactFactory *tp_factory)
{
    EmpathyTpContactFactoryPriv *priv = GET_PRIV (tp_factory);
    TpConn                      *tp_conn;

    if (priv->connection) {
        /* We already have our connection object */
        return;
    }

    tp_conn = mission_control_get_connection (priv->mc, priv->account, NULL);
    if (!tp_conn) {
        return;
    }

    /* We got a new connection, wait for it to be ready */
    priv->connection = tp_conn_dup_connection (tp_conn);
    g_object_unref (tp_conn);

    g_signal_connect_swapped (priv->connection, "invalidated",
                  G_CALLBACK (tp_contact_factory_connection_invalidated_cb),
                  tp_factory);
    g_signal_connect_swapped (priv->connection, "notify::connection-ready",
                  G_CALLBACK (tp_contact_factory_connection_ready_cb),
                  tp_factory);
}

static void
tp_contact_factory_status_changed_cb (MissionControl           *mc,
                      TpConnectionStatus        status,
                      McPresence                presence,
                      TpConnectionStatusReason  reason,
                      const gchar              *unique_name,
                      EmpathyTpContactFactory  *tp_factory)
{
    EmpathyTpContactFactoryPriv *priv = GET_PRIV (tp_factory);
    McAccount                   *account;

    account = mc_account_lookup (unique_name);
    if (account && empathy_account_equal (account, priv->account)) {
        tp_contact_factory_status_updated (tp_factory);
    }
    g_object_unref (account);
}

static void
tp_contact_factory_add_contact (EmpathyTpContactFactory *tp_factory,
                EmpathyContact          *contact)
{
    EmpathyTpContactFactoryPriv *priv = GET_PRIV (tp_factory);

    g_object_weak_ref (G_OBJECT (contact),
               tp_contact_factory_weak_notify,
               tp_factory);
    priv->contacts = g_list_prepend (priv->contacts, contact);

    if (!tp_proxy_has_interface_by_id (priv->connection,
                       TP_IFACE_QUARK_CONNECTION_INTERFACE_PRESENCE)) {
        /* We have no presence iface, set default presence
         * to available */
        empathy_contact_set_presence (contact, MC_PRESENCE_AVAILABLE);
    }

    empathy_debug (DEBUG_DOMAIN, "Contact added: %s (%d)",
               empathy_contact_get_id (contact),
               empathy_contact_get_handle (contact));
}

static void
tp_contact_factory_inspect_handles_cb (TpConnection  *connection,
                       const gchar  **ids,
                       const GError  *error,
                       gpointer       user_data,
                       GObject       *tp_factory)
{
    guint *handles = user_data;
    guint  i;
    const gchar **id;

    if (error) {
        empathy_debug (DEBUG_DOMAIN, "Failed to inspect handles: %s",
                   error->message);
    }

    i = 0;
    for (id = ids; *id; id++) {
        EmpathyContact *contact;

        contact = tp_contact_factory_find_by_handle (EMPATHY_TP_CONTACT_FACTORY (tp_factory),
                                 handles[i]);
        empathy_contact_set_id (contact, *id);

        i++;
    }
}

static void
tp_contact_factory_hold_handles_cb (TpConnection *connection,
                    const GError *error,
                    gpointer      userdata,
                    GObject      *tp_factory)
{
    if (error) {
        empathy_debug (DEBUG_DOMAIN, "Failed to hold handles: %s",
                   error->message);
    }
}

EmpathyContact *
empathy_tp_contact_factory_get_user (EmpathyTpContactFactory *tp_factory)
{
    EmpathyTpContactFactoryPriv *priv = GET_PRIV (tp_factory);

    g_return_val_if_fail (EMPATHY_IS_TP_CONTACT_FACTORY (tp_factory), NULL);

    return empathy_tp_contact_factory_get_from_handle (tp_factory,
                               priv->self_handle);
}

EmpathyContact *
empathy_tp_contact_factory_get_from_id (EmpathyTpContactFactory *tp_factory,
                    const gchar             *id)
{
    EmpathyTpContactFactoryPriv *priv = GET_PRIV (tp_factory);
    EmpathyContact              *contact;

    g_return_val_if_fail (EMPATHY_IS_TP_CONTACT_FACTORY (tp_factory), NULL);
    g_return_val_if_fail (id != NULL, NULL);

    /* Check if the contact already exists */
    contact = tp_contact_factory_find_by_id (tp_factory, id);
    if (contact) {
        return g_object_ref (contact);
    }

    /* Create new contact */
    contact = g_object_new (EMPATHY_TYPE_CONTACT,
                "account", priv->account,
                "id", id,
                NULL);
    tp_contact_factory_add_contact (tp_factory, contact);

    /* If the account is connected, request contact's handle */
    if (priv->connection) {
        const gchar *contact_ids[] = {id, NULL};
        GList       *contacts;
        
        contacts = g_list_prepend (NULL, g_object_ref (contact));
        tp_cli_connection_call_request_handles (priv->connection,
                            -1,
                            TP_HANDLE_TYPE_CONTACT,
                            contact_ids,
                            tp_contact_factory_request_handles_cb,
                            contacts, tp_contact_factory_list_free,
                            G_OBJECT (tp_factory));
    }

    return contact;
}

EmpathyContact *
empathy_tp_contact_factory_get_from_handle (EmpathyTpContactFactory *tp_factory,
                        guint                    handle)
{
    EmpathyContact *contact;
    GArray         *handles;
    GList          *contacts;

    g_return_val_if_fail (EMPATHY_IS_TP_CONTACT_FACTORY (tp_factory), NULL);

    handles = g_array_new (FALSE, FALSE, sizeof (guint));
    g_array_append_val (handles, handle);

    contacts = empathy_tp_contact_factory_get_from_handles (tp_factory, handles);
    g_array_free (handles, TRUE);

    contact = contacts ? contacts->data : NULL;
    g_list_free (contacts);

    return contact;
}

GList *
empathy_tp_contact_factory_get_from_handles (EmpathyTpContactFactory *tp_factory,
                         const GArray            *handles)
{
    EmpathyTpContactFactoryPriv *priv = GET_PRIV (tp_factory);
    GList                       *contacts = NULL;
    GArray                      *new_handles;
    guint                       *dup_handles;
    guint                        i;

    g_return_val_if_fail (EMPATHY_IS_TP_CONTACT_FACTORY (tp_factory), NULL);
    g_return_val_if_fail (handles != NULL, NULL);

    /* Search all contacts we already have */
    new_handles = g_array_new (FALSE, FALSE, sizeof (guint));
    for (i = 0; i < handles->len; i++) {
        EmpathyContact *contact;
        guint           handle;

        handle = g_array_index (handles, guint, i);
        if (handle == 0) {
            continue;
        }

        contact = tp_contact_factory_find_by_handle (tp_factory, handle);
        if (contact) {
            contacts = g_list_prepend (contacts, g_object_ref (contact));
        } else {
            g_array_append_val (new_handles, handle);
        }
    }

    if (new_handles->len == 0) {
        g_array_free (new_handles, TRUE);
        return contacts;
    }

    /* Create new contacts */
    for (i = 0; i < new_handles->len; i++) {
        EmpathyContact *contact;
        guint           handle;
        gboolean        is_user;

        handle = g_array_index (new_handles, guint, i);

        is_user = (handle == priv->self_handle);
        contact = g_object_new (EMPATHY_TYPE_CONTACT,
                    "account", priv->account,
                    "handle", handle,
                    "is-user", is_user,
                    NULL);
        tp_contact_factory_add_contact (tp_factory, contact);
        contacts = g_list_prepend (contacts, contact);
    }

    tp_contact_factory_request_everything (tp_factory, new_handles);

    /* Get the IDs of all new handles */
    dup_handles = g_memdup (new_handles->data, new_handles->len * sizeof (guint));
    tp_cli_connection_call_inspect_handles (priv->connection,
                        -1,
                        TP_HANDLE_TYPE_CONTACT,
                        new_handles,
                        tp_contact_factory_inspect_handles_cb,
                        dup_handles, g_free,
                        G_OBJECT (tp_factory));

    /* Hold all new handles. */
    /* FIXME: Should be unholded when removed from the factory */
    tp_cli_connection_call_hold_handles (priv->connection,
                         -1,
                         TP_HANDLE_TYPE_CONTACT,
                         new_handles,
                         tp_contact_factory_hold_handles_cb,
                         NULL, NULL,
                         G_OBJECT (tp_factory));

    return contacts;
}

void
empathy_tp_contact_factory_set_alias (EmpathyTpContactFactory *tp_factory,
                      EmpathyContact          *contact,
                      const gchar             *alias)
{
    EmpathyTpContactFactoryPriv *priv = GET_PRIV (tp_factory);
    GHashTable                  *new_alias;
    guint                        handle;

    g_return_if_fail (EMPATHY_IS_TP_CONTACT_FACTORY (tp_factory));
    g_return_if_fail (EMPATHY_IS_CONTACT (contact));
    g_return_if_fail (empathy_account_equal (empathy_contact_get_account (contact),
                         priv->account));

    handle = empathy_contact_get_handle (contact);

    empathy_debug (DEBUG_DOMAIN, "Setting alias for contact %s (%d) to %s",
               empathy_contact_get_id (contact),
               handle, alias);

    new_alias = g_hash_table_new_full (g_direct_hash,
                       g_direct_equal,
                       NULL,
                       g_free);

    g_hash_table_insert (new_alias,
                 GUINT_TO_POINTER (handle),
                 g_strdup (alias));

    tp_cli_connection_interface_aliasing_call_set_aliases (priv->connection,
                                   -1,
                                   new_alias,
                                   tp_contact_factory_set_aliases_cb,
                                   NULL, NULL,
                                   G_OBJECT (tp_factory));

    g_hash_table_destroy (new_alias);
}

void
empathy_tp_contact_factory_set_avatar (EmpathyTpContactFactory *tp_factory,
                       const gchar             *data,
                       gsize                    size,
                       const gchar             *mime_type)
{
    EmpathyTpContactFactoryPriv *priv = GET_PRIV (tp_factory);

    g_return_if_fail (EMPATHY_IS_TP_CONTACT_FACTORY (tp_factory));

    if (data && size > 0 && size < G_MAXUINT) {
        GArray avatar;

        avatar.data = (gchar*) data;
        avatar.len = size;

        empathy_debug (DEBUG_DOMAIN, "Setting avatar on account %s",
                   mc_account_get_unique_name (priv->account));

        tp_cli_connection_interface_avatars_call_set_avatar (priv->connection,
                                     -1,
                                     &avatar,
                                     mime_type,
                                     tp_contact_factory_set_avatar_cb,
                                     NULL, NULL,
                                     G_OBJECT (tp_factory));
    } else {
        empathy_debug (DEBUG_DOMAIN, "Clearing avatar on account %s",
                   mc_account_get_unique_name (priv->account));

        tp_cli_connection_interface_avatars_call_clear_avatar (priv->connection,
                                       -1,
                                       tp_contact_factory_clear_avatar_cb,
                                       NULL, NULL,
                                       G_OBJECT (tp_factory));
    }
}

static void
tp_contact_factory_get_property (GObject    *object,
                 guint       param_id,
                 GValue     *value,
                 GParamSpec *pspec)
{
    EmpathyTpContactFactoryPriv *priv = GET_PRIV (object);

    switch (param_id) {
    case PROP_ACCOUNT:
        g_value_set_object (value, priv->account);
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
        break;
    };
}

static void
tp_contact_factory_set_property (GObject      *object,
                 guint         param_id,
                 const GValue *value,
                 GParamSpec   *pspec)
{
    EmpathyTpContactFactoryPriv *priv = GET_PRIV (object);

    switch (param_id) {
    case PROP_ACCOUNT:
        priv->account = g_object_ref (g_value_get_object (value));
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
        break;
    };
}

static void
tp_contact_factory_finalize (GObject *object)
{
    EmpathyTpContactFactoryPriv *priv = GET_PRIV (object);
    GList                       *l;

    empathy_debug (DEBUG_DOMAIN, "Finalized: %p (%s)",
               object,
               mc_account_get_normalized_name (priv->account));

    dbus_g_proxy_disconnect_signal (DBUS_G_PROXY (priv->mc),
                    "AccountStatusChanged",
                    G_CALLBACK (tp_contact_factory_status_changed_cb),
                    object);

    for (l = priv->contacts; l; l = l->next) {
        g_object_weak_unref (G_OBJECT (l->data),
                     tp_contact_factory_weak_notify,
                     object);
    }

    g_list_free (priv->contacts);
    g_object_unref (priv->mc);
    g_object_unref (priv->account);

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

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

static GObject *
tp_contact_factory_constructor (GType                  type,
                guint                  n_props,
                GObjectConstructParam *props)
{
    GObject *tp_factory;
    EmpathyTpContactFactoryPriv *priv;

    tp_factory = G_OBJECT_CLASS (empathy_tp_contact_factory_parent_class)->constructor (type, n_props, props);
    priv = GET_PRIV (tp_factory);

    priv->ready = FALSE;
    tp_contact_factory_status_updated (EMPATHY_TP_CONTACT_FACTORY (tp_factory));

    return tp_factory;
}


static void
empathy_tp_contact_factory_class_init (EmpathyTpContactFactoryClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);

    object_class->finalize = tp_contact_factory_finalize;
    object_class->constructor = tp_contact_factory_constructor;
    object_class->get_property = tp_contact_factory_get_property;
    object_class->set_property = tp_contact_factory_set_property;

    /* Construct-only properties */
    g_object_class_install_property (object_class,
                     PROP_ACCOUNT,
                     g_param_spec_object ("account",
                                  "Factory's Account",
                                  "The account associated with the factory",
                                  MC_TYPE_ACCOUNT,
                                  G_PARAM_READWRITE |
                                  G_PARAM_CONSTRUCT_ONLY));

    g_type_class_add_private (object_class, sizeof (EmpathyTpContactFactoryPriv));
}

static void
empathy_tp_contact_factory_init (EmpathyTpContactFactory *tp_factory)
{
    EmpathyTpContactFactoryPriv *priv = GET_PRIV (tp_factory);

    priv->mc = empathy_mission_control_new ();
    dbus_g_proxy_connect_signal (DBUS_G_PROXY (priv->mc),
                     "AccountStatusChanged",
                     G_CALLBACK (tp_contact_factory_status_changed_cb),
                     tp_factory, NULL);
}

EmpathyTpContactFactory *
empathy_tp_contact_factory_new (McAccount *account)
{
    return g_object_new (EMPATHY_TYPE_TP_CONTACT_FACTORY,
                 "account", account,
                 NULL);
}