path: root/libempathy/empathy-tp-chat.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/channel.h>
#include <telepathy-glib/dbus.h>
#include <telepathy-glib/util.h>

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

#define GET_PRIV(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), \
               EMPATHY_TYPE_TP_CHAT, EmpathyTpChatPriv))

#define DEBUG_DOMAIN "TpChat"

struct _EmpathyTpChatPriv {
    EmpathyContactFactory *factory;
    EmpathyContact        *user;
    McAccount             *account;
    TpChannel             *channel;
    gchar                 *id;
    MissionControl        *mc;
    gboolean               acknowledge;
    TpChan                *tp_chan;
    gboolean               had_pending_messages;
    GSList                *message_queue;
    gboolean               had_properties_list;
    GPtrArray             *properties;
};

typedef struct {
    gchar          *name;
    guint           id;
    TpPropertyFlags flags;
    GValue         *value;
} TpChatProperty;

static void empathy_tp_chat_class_init (EmpathyTpChatClass *klass);
static void empathy_tp_chat_init       (EmpathyTpChat      *chat);

enum {
    PROP_0,
    PROP_ACCOUNT,
    PROP_TP_CHAN,
    PROP_CHANNEL,
    PROP_ACKNOWLEDGE,
};

enum {
    MESSAGE_RECEIVED,
    SEND_ERROR,
    CHAT_STATE_CHANGED,
    PROPERTY_CHANGED,
    DESTROY,
    LAST_SIGNAL
};

static guint signals[LAST_SIGNAL];

G_DEFINE_TYPE (EmpathyTpChat, empathy_tp_chat, G_TYPE_OBJECT);

static void
tp_chat_invalidated_cb (TpProxy       *proxy,
            guint          domain,
            gint           code,
            gchar         *message,
            EmpathyTpChat *chat)
{
    EmpathyTpChatPriv *priv = GET_PRIV (chat);

    empathy_debug (DEBUG_DOMAIN, "Channel invalidated: %s", message);

    g_object_unref (priv->channel);
    g_object_unref (priv->tp_chan);
    priv->channel = NULL;
    priv->tp_chan = NULL;

    g_signal_emit (chat, signals[DESTROY], 0);
}

static void
tp_chat_async_cb (TpChannel *proxy,
          const GError *error,
          gpointer user_data,
          GObject *weak_object)
{
    if (error) {
        empathy_debug (DEBUG_DOMAIN, "Error %s: %s",
                   user_data, error->message);
    }
}

static EmpathyMessage *
tp_chat_build_message (EmpathyTpChat *chat,
               guint          type,
               guint          timestamp,
               guint          from_handle,
               const gchar   *message_body)
{
    EmpathyTpChatPriv *priv;
    EmpathyMessage    *message;
    EmpathyContact    *sender;

    priv = GET_PRIV (chat);

    if (from_handle == 0) {
        sender = g_object_ref (priv->user);
    } else {
        sender = empathy_contact_factory_get_from_handle (priv->factory,
                                  priv->account,
                                  from_handle);
    }

    message = empathy_message_new (message_body);
    empathy_message_set_type (message, type);
    empathy_message_set_sender (message, sender);
    empathy_message_set_receiver (message, priv->user);
    empathy_message_set_timestamp (message, timestamp);

    g_object_unref (sender);

    return message;
}

static void
tp_chat_sender_ready_notify_cb (EmpathyContact *contact,
                GParamSpec     *param_spec,
                EmpathyTpChat  *chat)
{
    EmpathyTpChatPriv   *priv = GET_PRIV (chat);
    EmpathyMessage      *message;
    EmpathyContactReady  ready;
    EmpathyContact      *sender;
    gboolean             removed = FALSE;

    /* Emit all messages queued until we find a message with not
     * ready sender. When leaving this loop, sender is the first not ready
     * contact queued and removed tells if at least one message got removed
     * from the queue. */
    while (priv->message_queue) {
        message = priv->message_queue->data;
        sender = empathy_message_get_sender (message);
        ready = empathy_contact_get_ready (sender);

        if (!(ready & EMPATHY_CONTACT_READY_NAME)) {
            break;
        }

        empathy_debug (DEBUG_DOMAIN, "Queued message ready");
        g_signal_emit (chat, signals[MESSAGE_RECEIVED], 0, message);
        priv->message_queue = g_slist_remove (priv->message_queue,
                              message);
        g_object_unref (message);
        removed = TRUE;
    }

    if (removed) {
        g_signal_handlers_disconnect_by_func (contact,
                              tp_chat_sender_ready_notify_cb,
                              chat);

        if (priv->message_queue) {
            g_signal_connect (sender, "notify::ready",
                      G_CALLBACK (tp_chat_sender_ready_notify_cb),
                      chat);
        }
    }
}

static void
tp_chat_emit_or_queue_message (EmpathyTpChat  *chat,
                   EmpathyMessage *message)
{
    EmpathyTpChatPriv   *priv = GET_PRIV (chat);
    EmpathyContact      *sender;
    EmpathyContactReady  ready;

    if (priv->message_queue != NULL) {
        empathy_debug (DEBUG_DOMAIN, "Message queue not empty");
        priv->message_queue = g_slist_append (priv->message_queue,
                              g_object_ref (message));
        return;
    }

    sender = empathy_message_get_sender (message);
    ready = empathy_contact_get_ready (sender);
    if (ready & EMPATHY_CONTACT_READY_NAME) {
        empathy_debug (DEBUG_DOMAIN, "Message queue empty and sender ready");
        g_signal_emit (chat, signals[MESSAGE_RECEIVED], 0, message);
        return;
    }

    empathy_debug (DEBUG_DOMAIN, "Sender not ready");
    priv->message_queue = g_slist_append (priv->message_queue, 
                          g_object_ref (message));
    g_signal_connect (sender, "notify::ready",
              G_CALLBACK (tp_chat_sender_ready_notify_cb),
              chat);
}

static void
tp_chat_received_cb (TpChannel   *channel,
             guint        message_id,
             guint        timestamp,
             guint        from_handle,
             guint        message_type,
             guint        message_flags,
             const gchar *message_body,
             gpointer     user_data,
             GObject     *chat)
{
    EmpathyTpChatPriv *priv = GET_PRIV (chat);
    EmpathyMessage    *message;

    if (!priv->had_pending_messages) {
        return;
    }
 
    empathy_debug (DEBUG_DOMAIN, "Message received: %s", message_body);

    message = tp_chat_build_message (EMPATHY_TP_CHAT (chat),
                     message_type,
                     timestamp,
                     from_handle,
                     message_body);

    tp_chat_emit_or_queue_message (EMPATHY_TP_CHAT (chat), message);
    g_object_unref (message);

    if (priv->acknowledge) {
        GArray *message_ids;

        message_ids = g_array_new (FALSE, FALSE, sizeof (guint));
        g_array_append_val (message_ids, message_id);
        tp_cli_channel_type_text_call_acknowledge_pending_messages (priv->channel,
                                        -1,
                                        message_ids,
                                        tp_chat_async_cb,
                                        "acknowledging pending messages",
                                        NULL,
                                        chat);
        g_array_free (message_ids, TRUE);
    }
}

static void
tp_chat_sent_cb (TpChannel   *channel,
         guint        timestamp,
         guint        message_type,
         const gchar *message_body,
         gpointer     user_data,
         GObject     *chat)
{
    EmpathyMessage *message;

    empathy_debug (DEBUG_DOMAIN, "Message sent: %s", message_body);

    message = tp_chat_build_message (EMPATHY_TP_CHAT (chat),
                     message_type,
                     timestamp,
                     0,
                     message_body);

    tp_chat_emit_or_queue_message (EMPATHY_TP_CHAT (chat), message);
    g_object_unref (message);
}

static void
tp_chat_send_error_cb (TpChannel   *channel,
               guint        error_code,
               guint        timestamp,
               guint        message_type,
               const gchar *message_body,
               gpointer     user_data,
               GObject     *chat)
{
    EmpathyMessage *message;

    empathy_debug (DEBUG_DOMAIN, "Message sent error: %s (%d)",
               message_body, error_code);

    message = tp_chat_build_message (EMPATHY_TP_CHAT (chat),
                     message_type,
                     timestamp,
                     0,
                     message_body);

    g_signal_emit (chat, signals[SEND_ERROR], 0, message, error_code);
    g_object_unref (message);
}

static void
tp_chat_state_changed_cb (TpChannel *channel,
              guint      handle,
              guint      state,
              gpointer   user_data,
              GObject   *chat)
{
    EmpathyTpChatPriv *priv = GET_PRIV (chat);
    EmpathyContact    *contact;

    contact = empathy_contact_factory_get_from_handle (priv->factory,
                               priv->account,
                               handle);

    empathy_debug (DEBUG_DOMAIN, "Chat state changed for %s (%d): %d",
              empathy_contact_get_name (contact),
              handle, state);

    g_signal_emit (chat, signals[CHAT_STATE_CHANGED], 0, contact, state);
    g_object_unref (contact);
}

static void
tp_chat_list_pending_messages_cb (TpChannel       *channel,
                  const GPtrArray *messages_list,
                  const GError    *error,
                  gpointer         user_data,
                  GObject         *chat)
{
    EmpathyTpChatPriv *priv = GET_PRIV (chat);
    guint              i;

    priv->had_pending_messages = TRUE;

    if (error) {
        empathy_debug (DEBUG_DOMAIN, "Error listing pending messages: %s",
                   error->message);
        return;
    }

    for (i = 0; i < messages_list->len; i++) {
        EmpathyMessage *message;
        GValueArray    *message_struct;
        const gchar    *message_body;
        guint           message_id;
        guint           timestamp;
        guint           from_handle;
        guint           message_type;
        guint           message_flags;

        message_struct = g_ptr_array_index (messages_list, i);

        message_id = g_value_get_uint (g_value_array_get_nth (message_struct, 0));
        timestamp = g_value_get_uint (g_value_array_get_nth (message_struct, 1));
        from_handle = g_value_get_uint (g_value_array_get_nth (message_struct, 2));
        message_type = g_value_get_uint (g_value_array_get_nth (message_struct, 3));
        message_flags = g_value_get_uint (g_value_array_get_nth (message_struct, 4));
        message_body = g_value_get_string (g_value_array_get_nth (message_struct, 5));

        empathy_debug (DEBUG_DOMAIN, "Message pending: %s", message_body);

        message = tp_chat_build_message (EMPATHY_TP_CHAT (chat),
                         message_type,
                         timestamp,
                         from_handle,
                         message_body);

        tp_chat_emit_or_queue_message (EMPATHY_TP_CHAT (chat), message);
        g_object_unref (message);
    }
}

static void
tp_chat_property_flags_changed_cb (TpProxy         *proxy,
                   const GPtrArray *properties,
                   gpointer         user_data,
                   GObject         *chat)
{
    EmpathyTpChatPriv *priv = GET_PRIV (chat);
    guint              i, j;

    if (!priv->had_properties_list || !properties) {
        return;
    }

    for (i = 0; i < properties->len; i++) {
        GValueArray    *prop_struct;
        TpChatProperty *property;
        guint           id;
        guint           flags;

        prop_struct = g_ptr_array_index (properties, i);
        id = g_value_get_uint (g_value_array_get_nth (prop_struct, 0));
        flags = g_value_get_uint (g_value_array_get_nth (prop_struct, 1));

        for (j = 0; j < priv->properties->len; j++) {
            property = g_ptr_array_index (priv->properties, j);
            if (property->id == id) {
                property->flags = flags;
                empathy_debug (DEBUG_DOMAIN,
                           "property %s flags changed: %d",
                           property->name, property->flags);
                break;
            }
        }
    }
}

static void
tp_chat_properties_changed_cb (TpProxy         *proxy,
                   const GPtrArray *properties,
                   gpointer         user_data,
                   GObject         *chat)
{
    EmpathyTpChatPriv *priv = GET_PRIV (chat);
    guint              i, j;

    if (!priv->had_properties_list || !properties) {
        return;
    }

    for (i = 0; i < properties->len; i++) {
        GValueArray    *prop_struct;
        TpChatProperty *property;
        guint           id;
        GValue         *src_value;

        prop_struct = g_ptr_array_index (properties, i);
        id = g_value_get_uint (g_value_array_get_nth (prop_struct, 0));
        src_value = g_value_get_boxed (g_value_array_get_nth (prop_struct, 1));

        for (j = 0; j < priv->properties->len; j++) {
            property = g_ptr_array_index (priv->properties, j);
            if (property->id == id) {
                if (property->value) {
                    g_value_copy (src_value, property->value);
                } else {
                    property->value = tp_g_value_slice_dup (src_value);
                }

                empathy_debug (DEBUG_DOMAIN, "property %s changed",
                           property->name);
                g_signal_emit (chat, signals[PROPERTY_CHANGED], 0,
                           property->name, property->value);
                break;
            }
        }
    }
}

static void
tp_chat_get_properties_cb (TpProxy         *proxy,
               const GPtrArray *properties,
               const GError    *error,
               gpointer         user_data,
               GObject         *chat)
{
    if (error) {
        empathy_debug (DEBUG_DOMAIN, "Error getting properties: %s",
                   error->message);
        return;
    }

    tp_chat_properties_changed_cb (proxy, properties, user_data, chat);
}

static void
tp_chat_list_properties_cb (TpProxy         *proxy,
                const GPtrArray *properties,
                const GError    *error,
                gpointer         user_data,
                GObject         *chat)
{
    EmpathyTpChatPriv *priv = GET_PRIV (chat);
    GArray            *ids;
    guint              i;

    priv->had_properties_list = TRUE;

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

    ids = g_array_sized_new (FALSE, FALSE, sizeof (guint), properties->len);
    priv->properties = g_ptr_array_sized_new (properties->len);
    for (i = 0; i < properties->len; i++) {
        GValueArray    *prop_struct;
        TpChatProperty *property;

        prop_struct = g_ptr_array_index (properties, i);
        property = g_slice_new0 (TpChatProperty);
        property->id = g_value_get_uint (g_value_array_get_nth (prop_struct, 0));
        property->name = g_value_dup_string (g_value_array_get_nth (prop_struct, 1));
        property->flags = g_value_get_uint (g_value_array_get_nth (prop_struct, 3));

        empathy_debug (DEBUG_DOMAIN, "Adding property name=%s id=%d flags=%d",
                   property->name, property->id, property->flags);
        g_ptr_array_add (priv->properties, property);
        if (property->flags & TP_PROPERTY_FLAG_READ) {
            g_array_append_val (ids, property->id);
        }
    }

    tp_cli_properties_interface_call_get_properties (proxy, -1,
                             ids,
                             tp_chat_get_properties_cb,
                             NULL, NULL,
                             chat);

    g_array_free (ids, TRUE);
}

void
empathy_tp_chat_set_property (EmpathyTpChat *chat,
                  const gchar   *name,
                  const GValue  *value)
{
    EmpathyTpChatPriv *priv = GET_PRIV (chat);
    TpChatProperty    *property;
    guint              i;

    for (i = 0; i < priv->properties->len; i++) {
        property = g_ptr_array_index (priv->properties, i);
        if (!tp_strdiff (property->name, name)) {
            GPtrArray   *properties;
            GValueArray *prop;
            GValue       id = {0, };
            GValue       dest_value = {0, };

            if (!(property->flags & TP_PROPERTY_FLAG_WRITE)) {
                break;
            }

            g_value_init (&id, G_TYPE_UINT);
            g_value_init (&dest_value, G_TYPE_VALUE);
            g_value_set_uint (&id, property->id);
            g_value_set_boxed (&dest_value, value);

            prop = g_value_array_new (2);
            g_value_array_append (prop, &id);
            g_value_array_append (prop, &dest_value);

            properties = g_ptr_array_sized_new (1);
            g_ptr_array_add (properties, prop);

            empathy_debug (DEBUG_DOMAIN, "Set property %s", name);
            tp_cli_properties_interface_call_set_properties (priv->channel, -1,
                                     properties,
                                     (tp_cli_properties_interface_callback_for_set_properties)
                                     tp_chat_async_cb,
                                     "Seting property", NULL,
                                     G_OBJECT (chat));

            g_ptr_array_free (properties, TRUE);
            g_value_array_free (prop);

            break;
        }
    }
}

static gboolean
tp_chat_channel_ready_cb (EmpathyTpChat *chat)
{
    EmpathyTpChatPriv *priv = GET_PRIV (chat);

    empathy_debug (DEBUG_DOMAIN, "Channel ready");

    tp_cli_channel_type_text_call_list_pending_messages (priv->channel, -1,
                                 priv->acknowledge,
                                 tp_chat_list_pending_messages_cb,
                                 NULL, NULL,
                                 G_OBJECT (chat));
    tp_cli_properties_interface_call_list_properties (priv->channel, -1,
                              tp_chat_list_properties_cb,
                              NULL, NULL,
                              G_OBJECT (chat));


    tp_cli_channel_type_text_connect_to_received (priv->channel,
                              tp_chat_received_cb,
                              NULL, NULL,
                              G_OBJECT (chat), NULL);
    tp_cli_channel_type_text_connect_to_sent (priv->channel,
                          tp_chat_sent_cb,
                          NULL, NULL,
                          G_OBJECT (chat), NULL);
    tp_cli_channel_type_text_connect_to_send_error (priv->channel,
                            tp_chat_send_error_cb,
                            NULL, NULL,
                            G_OBJECT (chat), NULL);
    tp_cli_channel_interface_chat_state_connect_to_chat_state_changed (priv->channel,
                                       tp_chat_state_changed_cb,
                                       NULL, NULL,
                                       G_OBJECT (chat), NULL);
    tp_cli_channel_interface_chat_state_connect_to_chat_state_changed (priv->channel,
                                       tp_chat_state_changed_cb,
                                       NULL, NULL,
                                       G_OBJECT (chat), NULL);
    tp_cli_properties_interface_connect_to_properties_changed (priv->channel,
                                   tp_chat_properties_changed_cb,
                                   NULL, NULL,
                                   G_OBJECT (chat), NULL);
    tp_cli_properties_interface_connect_to_property_flags_changed (priv->channel,
                                       tp_chat_property_flags_changed_cb,
                                       NULL, NULL,
                                       G_OBJECT (chat), NULL);

    return FALSE;
}

static void
tp_chat_finalize (GObject *object)
{
    EmpathyTpChatPriv *priv = GET_PRIV (object);
    guint              i;

    if (priv->acknowledge && priv->channel) {
        empathy_debug (DEBUG_DOMAIN, "Closing channel...");
        tp_cli_channel_call_close (priv->channel, -1,
                       tp_chat_async_cb,
                       "closing channel", NULL,
                       NULL);
    }

    if (priv->channel) {
        g_signal_handlers_disconnect_by_func (priv->channel,
                              tp_chat_invalidated_cb,
                              object);
        g_object_unref (priv->channel);
    }
    if (priv->tp_chan) {
        g_object_unref (priv->tp_chan);
    }

    if (priv->properties) {
        for (i = 0; i < priv->properties->len; i++) {
            TpChatProperty *property;

            property = g_ptr_array_index (priv->properties, i);
            g_free (property->name);
            if (property->value) {
                tp_g_value_slice_free (property->value);
            }
            g_slice_free (TpChatProperty, property);
        }
        g_ptr_array_free (priv->properties, TRUE);
    }

    g_object_unref (priv->factory);
    g_object_unref (priv->user);
    g_object_unref (priv->account);
    g_object_unref (priv->mc);
    g_free (priv->id);

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

static GObject *
tp_chat_constructor (GType                  type,
             guint                  n_props,
             GObjectConstructParam *props)
{
    GObject           *chat;
    EmpathyTpChatPriv *priv;
    gboolean           channel_ready;

    chat = G_OBJECT_CLASS (empathy_tp_chat_parent_class)->constructor (type, n_props, props);

    priv = GET_PRIV (chat);
    priv->factory = empathy_contact_factory_new ();
    priv->user = empathy_contact_factory_get_user (priv->factory, priv->account);
    priv->mc = empathy_mission_control_new ();

    g_signal_connect (priv->channel, "invalidated",
              G_CALLBACK (tp_chat_invalidated_cb),
              chat);

    g_object_get (priv->channel, "channel-ready", &channel_ready, NULL);
    if (channel_ready) {
        /* FIXME: We do that in a cb to let time to set the acknowledge
         * property, this property should be required for construct. */
        g_idle_add ((GSourceFunc) tp_chat_channel_ready_cb, chat);
    } else {
        g_signal_connect_swapped (priv->channel, "notify::channel-ready",
                      G_CALLBACK (tp_chat_channel_ready_cb),
                      chat);
    }

    return chat;
}

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

    switch (param_id) {
    case PROP_ACCOUNT:
        g_value_set_object (value, priv->account);
        break;
    case PROP_TP_CHAN:
        g_value_set_object (value, priv->tp_chan);
        break;
    case PROP_CHANNEL:
        g_value_set_object (value, priv->channel);
        break;
    case PROP_ACKNOWLEDGE:
        g_value_set_boolean (value, priv->acknowledge);
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
        break;
    };
}

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

    switch (param_id) {
    case PROP_ACCOUNT:
        priv->account = g_object_ref (g_value_get_object (value));
        break;
    case PROP_TP_CHAN:
        priv->tp_chan = g_object_ref (g_value_get_object (value));
        break;
    case PROP_CHANNEL:
        priv->channel = g_object_ref (g_value_get_object (value));
        break;
    case PROP_ACKNOWLEDGE:
        empathy_tp_chat_set_acknowledge (EMPATHY_TP_CHAT (object),
                         g_value_get_boolean (value));
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
        break;
    };
}

static void
empathy_tp_chat_class_init (EmpathyTpChatClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);

    object_class->finalize = tp_chat_finalize;
    object_class->constructor = tp_chat_constructor;
    object_class->get_property = tp_chat_get_property;
    object_class->set_property = tp_chat_set_property;

    /* Construct properties */
    g_object_class_install_property (object_class,
                     PROP_ACCOUNT,
                     g_param_spec_object ("account",
                                  "channel Account",
                                  "The account associated with the channel",
                                  MC_TYPE_ACCOUNT,
                                  G_PARAM_READWRITE |
                                  G_PARAM_CONSTRUCT_ONLY));
    g_object_class_install_property (object_class,
                     PROP_TP_CHAN,
                     g_param_spec_object ("tp-chan",
                                  "telepathy channel",
                                  "The text channel for the chat",
                                  TELEPATHY_CHAN_TYPE,
                                  G_PARAM_READWRITE |
                                  G_PARAM_CONSTRUCT_ONLY));

    g_object_class_install_property (object_class,
                     PROP_CHANNEL,
                     g_param_spec_object ("channel",
                                  "telepathy channel",
                                  "The text channel for the chat",
                                  TP_TYPE_CHANNEL,
                                  G_PARAM_READWRITE |
                                  G_PARAM_CONSTRUCT_ONLY));

    g_object_class_install_property (object_class,
                     PROP_ACKNOWLEDGE,
                     g_param_spec_boolean ("acknowledge",
                                   "acknowledge messages",
                                   "Wheter or not received messages should be acknowledged",
                                   FALSE,
                                   G_PARAM_READWRITE |
                                   G_PARAM_CONSTRUCT));

    /* Signals */
    signals[MESSAGE_RECEIVED] =
        g_signal_new ("message-received",
                  G_TYPE_FROM_CLASS (klass),
                  G_SIGNAL_RUN_LAST,
                  0,
                  NULL, NULL,
                  g_cclosure_marshal_VOID__OBJECT,
                  G_TYPE_NONE,
                  1, EMPATHY_TYPE_MESSAGE);

    signals[SEND_ERROR] =
        g_signal_new ("send-error",
                  G_TYPE_FROM_CLASS (klass),
                  G_SIGNAL_RUN_LAST,
                  0,
                  NULL, NULL,
                  _empathy_marshal_VOID__OBJECT_UINT,
                  G_TYPE_NONE,
                  2, EMPATHY_TYPE_MESSAGE, G_TYPE_UINT);

    signals[CHAT_STATE_CHANGED] =
        g_signal_new ("chat-state-changed",
                  G_TYPE_FROM_CLASS (klass),
                  G_SIGNAL_RUN_LAST,
                  0,
                  NULL, NULL,
                  _empathy_marshal_VOID__OBJECT_UINT,
                  G_TYPE_NONE,
                  2, EMPATHY_TYPE_CONTACT, G_TYPE_UINT);

    signals[PROPERTY_CHANGED] =
        g_signal_new ("property-changed",
                  G_TYPE_FROM_CLASS (klass),
                  G_SIGNAL_RUN_LAST,
                  0,
                  NULL, NULL,
                  _empathy_marshal_VOID__STRING_BOXED,
                  G_TYPE_NONE,
                  2, G_TYPE_STRING, G_TYPE_VALUE);

    signals[DESTROY] =
        g_signal_new ("destroy",
                  G_TYPE_FROM_CLASS (klass),
                  G_SIGNAL_RUN_LAST,
                  0,
                  NULL, NULL,
                  g_cclosure_marshal_VOID__VOID,
                  G_TYPE_NONE,
                  0);

    g_type_class_add_private (object_class, sizeof (EmpathyTpChatPriv));
}

static void
empathy_tp_chat_init (EmpathyTpChat *chat)
{
}

EmpathyTpChat *
empathy_tp_chat_new (McAccount *account,
             TpChan    *tp_chan)
{
    EmpathyTpChat  *chat;
    TpChannel      *channel;
    TpConnection   *connection;
    MissionControl *mc;
    TpConn         *tp_conn;

    mc = empathy_mission_control_new ();
    tp_conn = mission_control_get_connection (mc, account, NULL);
    connection = tp_conn_dup_connection (tp_conn);
    channel = tp_chan_dup_channel (tp_chan, connection, NULL);

    chat = g_object_new (EMPATHY_TYPE_TP_CHAT, 
                 "account", account,
                 "channel", channel,
                 "tp-chan", tp_chan,
                 NULL);

    g_object_unref (channel);
    g_object_unref (tp_conn);
    g_object_unref (connection);
    g_object_unref (mc);

    return chat;
}

EmpathyTpChat *
empathy_tp_chat_new_with_contact (EmpathyContact *contact)
{
    EmpathyTpChat  *chat;
    MissionControl *mc;
    McAccount      *account;
    TpConn         *tp_conn;
    TpChan         *text_chan;
    const gchar    *bus_name;
    guint           handle;

    g_return_val_if_fail (EMPATHY_IS_CONTACT (contact), NULL);

    mc = empathy_mission_control_new ();
    account = empathy_contact_get_account (contact);

    if (mission_control_get_connection_status (mc, account, NULL) != 0) {
        /* The account is not connected. */
        return NULL;
    }

    tp_conn = mission_control_get_connection (mc, account, NULL);
    g_return_val_if_fail (tp_conn != NULL, NULL);
    bus_name = dbus_g_proxy_get_bus_name (DBUS_G_PROXY (tp_conn));
    handle = empathy_contact_get_handle (contact);

    text_chan = tp_conn_new_channel (tp_get_bus (),
                     tp_conn,
                     bus_name,
                     TP_IFACE_CHANNEL_TYPE_TEXT,
                     TP_HANDLE_TYPE_CONTACT,
                     handle,
                     TRUE);

    chat = empathy_tp_chat_new (account, text_chan);

    g_object_unref (tp_conn);
    g_object_unref (text_chan);
    g_object_unref (mc);

    return chat;
}

gboolean
empathy_tp_chat_get_acknowledge (EmpathyTpChat *chat)
{
    EmpathyTpChatPriv *priv;

    g_return_val_if_fail (EMPATHY_IS_TP_CHAT (chat), FALSE);

    priv = GET_PRIV (chat);

    return priv->acknowledge;
}

void
empathy_tp_chat_set_acknowledge (EmpathyTpChat *chat,
                 gboolean       acknowledge)
{
    EmpathyTpChatPriv *priv;

    g_return_if_fail (EMPATHY_IS_TP_CHAT (chat));

    priv = GET_PRIV (chat);

    priv->acknowledge = acknowledge;
    g_object_notify (G_OBJECT (chat), "acknowledge");
}

TpChan *
empathy_tp_chat_get_channel (EmpathyTpChat *chat)
{
    EmpathyTpChatPriv *priv;

    g_return_val_if_fail (EMPATHY_IS_TP_CHAT (chat), NULL);

    priv = GET_PRIV (chat);

    return priv->tp_chan;
}

McAccount *
empathy_tp_chat_get_account (EmpathyTpChat *chat)
{
    EmpathyTpChatPriv *priv;

    g_return_val_if_fail (EMPATHY_IS_TP_CHAT (chat), NULL);

    priv = GET_PRIV (chat);

    return priv->account;
}

void
empathy_tp_chat_send (EmpathyTpChat *chat,
              EmpathyMessage *message)
{
    EmpathyTpChatPriv  *priv;
    const gchar        *message_body;
    EmpathyMessageType  message_type;

    g_return_if_fail (EMPATHY_IS_TP_CHAT (chat));
    g_return_if_fail (EMPATHY_IS_MESSAGE (message));

    priv = GET_PRIV (chat);

    message_body = empathy_message_get_body (message);
    message_type = empathy_message_get_type (message);

    empathy_debug (DEBUG_DOMAIN, "Sending message: %s", message_body);
    tp_cli_channel_type_text_call_send (priv->channel, -1,
                        message_type,
                        message_body,
                        tp_chat_async_cb,
                        "sending message", NULL,
                        G_OBJECT (chat));
}

void
empathy_tp_chat_set_state (EmpathyTpChat      *chat,
               TpChannelChatState  state)
{
    EmpathyTpChatPriv *priv;

    g_return_if_fail (EMPATHY_IS_TP_CHAT (chat));

    priv = GET_PRIV (chat);

    empathy_debug (DEBUG_DOMAIN, "Set state: %d", state);
    tp_cli_channel_interface_chat_state_call_set_chat_state (priv->channel, -1,
                                 state,
                                 tp_chat_async_cb,
                                 "setting chat state",
                                 NULL,
                                 G_OBJECT (chat));
}

const gchar *
empathy_tp_chat_get_id (EmpathyTpChat *chat)
{
    EmpathyTpChatPriv *priv;

    g_return_val_if_fail (EMPATHY_IS_TP_CHAT (chat), NULL);

    priv = GET_PRIV (chat);

    if (!priv->id) {
        priv->id = empathy_inspect_channel (priv->account, priv->tp_chan);
    }

    return priv->id;
}