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

#include <config.h>

#include <libmissioncontrol/mission-control.h>

#include "empathy-tp-chatroom.h"
#include "empathy-tp-contact-list.h"
#include "empathy-contact-list.h"
#include "empathy-contact-manager.h"
#include "empathy-tp-group.h"
#include "empathy-utils.h"
#include "empathy-debug.h"

#define GET_PRIV(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), \
               EMPATHY_TYPE_TP_CHATROOM, EmpathyTpChatroomPriv))

#define DEBUG_DOMAIN "TpChatroom"

struct _EmpathyTpChatroomPriv {
    EmpathyContactManager *manager;
    EmpathyTpContactList  *list;
    EmpathyTpGroup        *group;

    gboolean               is_invited;
    EmpathyContact        *invitor;
    gchar                 *invit_message;
};

static void            empathy_tp_chatroom_class_init (EmpathyTpChatroomClass  *klass);
static void            tp_chatroom_iface_init         (EmpathyContactListIface *iface);
static void            empathy_tp_chatroom_init       (EmpathyTpChatroom       *chatroom);
static void            tp_chatroom_finalize           (GObject                 *object);
static void            tp_chatroom_members_added_cb   (EmpathyTpGroup          *group,
                               GArray                  *handles,
                               guint                    actor_handle,
                               guint                    reason,
                               const gchar             *message,
                               EmpathyTpChatroom       *list);
static void            tp_chatroom_members_removed_cb (EmpathyTpGroup          *group,
                               GArray                  *handles,
                               guint                    actor_handle,
                               guint                    reason,
                               const gchar             *message,
                               EmpathyTpChatroom       *list);
static void            tp_chatroom_setup              (EmpathyContactList      *list);
static EmpathyContact * tp_chatroom_find               (EmpathyContactList      *list,
                               const gchar             *id);
static void            tp_chatroom_add                (EmpathyContactList      *list,
                               EmpathyContact           *contact,
                               const gchar             *message);
static void            tp_chatroom_remove             (EmpathyContactList      *list,
                               EmpathyContact           *contact,
                               const gchar             *message);
static GList *         tp_chatroom_get_members        (EmpathyContactList      *list);

G_DEFINE_TYPE_WITH_CODE (EmpathyTpChatroom, empathy_tp_chatroom, EMPATHY_TYPE_TP_CHAT,
             G_IMPLEMENT_INTERFACE (EMPATHY_TYPE_CONTACT_LIST,
                        tp_chatroom_iface_init));

static void
empathy_tp_chatroom_class_init (EmpathyTpChatroomClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);

    object_class->finalize = tp_chatroom_finalize;

    g_type_class_add_private (object_class, sizeof (EmpathyTpChatroomPriv));
}

static void
tp_chatroom_iface_init (EmpathyContactListIface *iface)
{
    iface->setup       = tp_chatroom_setup;
    iface->find        = tp_chatroom_find;
    iface->add         = tp_chatroom_add;
    iface->remove      = tp_chatroom_remove;
    iface->get_members = tp_chatroom_get_members;
}

static void
empathy_tp_chatroom_init (EmpathyTpChatroom *chatroom)
{
}

static void
tp_chatroom_finalize (GObject *object)
{
    EmpathyTpChatroomPriv *priv;
    EmpathyTpChatroom     *chatroom;

    chatroom = EMPATHY_TP_CHATROOM (object);
    priv = GET_PRIV (chatroom);

    g_object_unref (priv->group);
    g_object_unref (priv->manager);

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

    g_free (priv->invit_message);

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

EmpathyTpChatroom *
empathy_tp_chatroom_new (McAccount *account,
             TpChan    *tp_chan)
{
    EmpathyTpChatroomPriv *priv;
    EmpathyTpChatroom     *chatroom;
    TpConn                *tp_conn;
    MissionControl        *mc;
    GList                 *members, *l;
    guint                  self_handle;

    g_return_val_if_fail (MC_IS_ACCOUNT (account), NULL);
    g_return_val_if_fail (TELEPATHY_IS_CHAN (tp_chan), NULL);

    chatroom = g_object_new (EMPATHY_TYPE_TP_CHATROOM,
                 "account", account,
                 "tp-chan", tp_chan,
                 NULL);

    priv = GET_PRIV (chatroom);

    mc = empathy_mission_control_new ();
    tp_conn = mission_control_get_connection (mc, account, NULL);
    priv->manager = empathy_contact_manager_new ();
    priv->list = empathy_contact_manager_get_list (priv->manager, account);
    priv->group = empathy_tp_group_new (tp_chan, tp_conn);

    g_signal_connect (priv->group, "members-added",
              G_CALLBACK (tp_chatroom_members_added_cb),
              chatroom);
    g_signal_connect (priv->group, "members-removed",
              G_CALLBACK (tp_chatroom_members_removed_cb),
              chatroom);

    /* Check if we are invited to join the chat */
    self_handle = empathy_tp_group_get_self_handle (priv->group);
    members = empathy_tp_group_get_local_pending_members_with_info (priv->group);
    for (l = members; l; l = l->next) {
        EmpathyTpGroupInfo *info;

        info = l->data;

        if (info->member != self_handle) {
            continue;
        }

        priv->invitor = empathy_tp_contact_list_get_from_handle (priv->list,
                                     info->actor);
        priv->invit_message = g_strdup (info->message);
        priv->is_invited = TRUE;

        empathy_debug (DEBUG_DOMAIN, "We are invited to join by %s: %s",
                  empathy_contact_get_name (priv->invitor),
                  priv->invit_message);
    }

    empathy_tp_group_info_list_free (members);
    g_object_unref (mc);
    g_object_unref (tp_conn);

    return chatroom;
}

gboolean
empathy_tp_chatroom_get_invitation (EmpathyTpChatroom  *chatroom,
                    EmpathyContact     **contact,
                    const gchar       **message)
{
    EmpathyTpChatroomPriv *priv;

    g_return_val_if_fail (EMPATHY_IS_TP_CHATROOM (chatroom), FALSE);

    priv = GET_PRIV (chatroom);

    if (*contact) {
        *contact = priv->invitor;
    }
    if (*message) {
        *message = priv->invit_message;
    }

    return priv->is_invited;
}

void
empathy_tp_chatroom_accept_invitation (EmpathyTpChatroom *chatroom)
{
    EmpathyTpChatroomPriv *priv;
    guint                  self_handle;

    g_return_if_fail (EMPATHY_IS_TP_CHATROOM (chatroom));

    priv = GET_PRIV (chatroom);

    /* Clear invitation data */
    priv->is_invited = FALSE;
    if (priv->invitor) {
        g_object_unref (priv->invitor);
        priv->invitor = NULL;
    }
    g_free (priv->invit_message);
    priv->invit_message = NULL;

    /* Add ourself in the members of the room */
    self_handle = empathy_tp_group_get_self_handle (priv->group);
    empathy_tp_group_add_member (priv->group, self_handle,
                       "Just for fun");
}

void
empathy_tp_chatroom_set_topic (EmpathyTpChatroom *chatroom,
                   const gchar       *topic)
{
}

static void
tp_chatroom_members_added_cb (EmpathyTpGroup    *group,
                  GArray            *handles,
                  guint              actor_handle,
                  guint              reason,
                  const gchar       *message,
                  EmpathyTpChatroom *chatroom)
{
    EmpathyTpChatroomPriv *priv;
    GList                 *contacts, *l;

    priv = GET_PRIV (chatroom);

    contacts = empathy_tp_contact_list_get_from_handles (priv->list, handles);
    for (l = contacts; l; l = l->next) {
        EmpathyContact *contact;

        contact = l->data;

        g_signal_emit_by_name (chatroom, "contact-added", contact);

        g_object_unref (contact);
    }
    g_list_free (contacts);
}

static void
tp_chatroom_members_removed_cb (EmpathyTpGroup    *group,
                GArray            *handles,
                guint              actor_handle,
                guint              reason,
                const gchar       *message,
                EmpathyTpChatroom *chatroom)
{
    EmpathyTpChatroomPriv *priv;
    GList                 *contacts, *l;

    priv = GET_PRIV (chatroom);

    contacts = empathy_tp_contact_list_get_from_handles (priv->list, handles);
    for (l = contacts; l; l = l->next) {
        EmpathyContact *contact;

        contact = l->data;

        g_signal_emit_by_name (chatroom, "contact-removed", contact);

        g_object_unref (contact);
    }
    g_list_free (contacts);
}

static void
tp_chatroom_setup (EmpathyContactList *list)
{
    /* Nothing to do */
}

static EmpathyContact *
tp_chatroom_find (EmpathyContactList *list,
          const gchar        *id)
{
    return NULL;
}

static void
tp_chatroom_add (EmpathyContactList *list,
         EmpathyContact     *contact,
         const gchar        *message)
{
    EmpathyTpChatroomPriv *priv;

    g_return_if_fail (EMPATHY_IS_TP_CHATROOM (list));
    g_return_if_fail (EMPATHY_IS_CONTACT (contact));

    priv = GET_PRIV (list);

    empathy_tp_group_add_member (priv->group,
                     empathy_contact_get_handle (contact),
                     message);
}

static void
tp_chatroom_remove (EmpathyContactList *list,
            EmpathyContact     *contact,
            const gchar        *message)
{
    EmpathyTpChatroomPriv *priv;

    g_return_if_fail (EMPATHY_IS_TP_CHATROOM (list));
    g_return_if_fail (EMPATHY_IS_CONTACT (contact));

    priv = GET_PRIV (list);

    empathy_tp_group_remove_member (priv->group,
                    empathy_contact_get_handle (contact),
                    message);
}

static GList *
tp_chatroom_get_members (EmpathyContactList *list)
{
    EmpathyTpChatroomPriv *priv;
    GArray                *members;
    GList                 *contacts;

    g_return_val_if_fail (EMPATHY_IS_TP_CHATROOM (list), NULL);

    priv = GET_PRIV (list);

    members = empathy_tp_group_get_members (priv->group);
    contacts = empathy_tp_contact_list_get_from_handles (priv->list, members);
    g_array_free (members, TRUE);

    return contacts;
}