path: root/src/empathy-event-manager.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 <glib/gi18n.h>

#include <telepathy-glib/util.h>

#include <libempathy/empathy-dispatcher.h>
#include <libempathy/empathy-contact-manager.h>
#include <libempathy/empathy-tp-chat.h>
#include <libempathy/empathy-tp-group.h>
#include <libempathy/empathy-utils.h>
#include <libempathy-gtk/empathy-images.h>
#include <libempathy-gtk/empathy-contact-dialogs.h>

#include "empathy-event-manager.h"

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

#define GET_PRIV(obj) EMPATHY_GET_PRIV (obj, EmpathyEventManager)
typedef struct {
    EmpathyDispatcher     *dispatcher;
    EmpathyContactManager *contact_manager;
    GSList                *events;
} EmpathyEventManagerPriv;

typedef struct _EventPriv EventPriv;
typedef void (*EventFunc) (EventPriv *event);

struct _EventPriv {
    EmpathyEvent         public;
    TpChannel           *channel;
    EmpathyEventManager *manager;
    EventFunc            func;
    gpointer             user_data;
};

enum {
    EVENT_ADDED,
    EVENT_REMOVED,
    LAST_SIGNAL
};

static guint signals[LAST_SIGNAL];

G_DEFINE_TYPE (EmpathyEventManager, empathy_event_manager, G_TYPE_OBJECT);

static void event_remove (EventPriv *event);

static void
event_free (EventPriv *event)
{
    g_free (event->public.icon_name);
    g_free (event->public.message);

    if (event->public.contact) {
        g_object_unref (event->public.contact);
    }

    if (event->channel) {
        g_signal_handlers_disconnect_by_func (event->channel,
                              event_remove,
                              event);
        g_object_unref (event->channel);
    }
    g_slice_free (EventPriv, event);
}

static void
event_remove (EventPriv *event)
{
    EmpathyEventManagerPriv *priv = GET_PRIV (event->manager);

    DEBUG ("Removing event %p", event);
    priv->events = g_slist_remove (priv->events, event);
    g_signal_emit (event->manager, signals[EVENT_REMOVED], 0, event);
    event_free (event);
}

static void
event_manager_add (EmpathyEventManager *manager,
           EmpathyContact      *contact,
           const gchar         *icon_name,
           const gchar         *message,
           TpChannel           *channel,
           EventFunc            func,
           gpointer             user_data)
{
    EmpathyEventManagerPriv *priv = GET_PRIV (manager);
    EventPriv               *event;

    event = g_slice_new0 (EventPriv);
    event->public.contact = contact ? g_object_ref (contact) : NULL;
    event->public.icon_name = g_strdup (icon_name);
    event->public.message = g_strdup (message);
    event->manager = manager;
    event->func = func;
    event->user_data = user_data;

    if (channel) {
        event->channel = g_object_ref (channel);
        g_signal_connect_swapped (channel, "invalidated",
                      G_CALLBACK (event_remove),
                      event);
    }

    DEBUG ("Adding event %p", event);
    priv->events = g_slist_prepend (priv->events, event);
    g_signal_emit (event->manager, signals[EVENT_ADDED], 0, event);
}

static void
event_channel_process_func (EventPriv *event)
{
    EmpathyEventManagerPriv *priv = GET_PRIV (event->manager);

    /* This will emit "dispatch-channel" and the event will be removed
     * in the callback of that signal, no need to remove the event here. */ 
    empathy_dispatcher_channel_process (priv->dispatcher, event->channel);
}

static gboolean
event_manager_chat_unref_idle (gpointer user_data)
{
    g_object_unref (user_data);
    return FALSE;
}

static void
event_manager_chat_message_received_cb (EmpathyTpChat       *tp_chat,
                    EmpathyMessage      *message,
                    EmpathyEventManager *manager)
{
    EmpathyContact  *sender;
    gchar           *msg;
    TpChannel       *channel;

    g_idle_add (event_manager_chat_unref_idle, tp_chat);
    g_signal_handlers_disconnect_by_func (tp_chat,
                          event_manager_chat_message_received_cb,
                          manager);

    sender = empathy_message_get_sender (message);
    msg = g_strdup_printf (_("New message from %s:\n%s"),
                   empathy_contact_get_name (sender),
                   empathy_message_get_body (message));

    channel = empathy_tp_chat_get_channel (tp_chat);
    event_manager_add (manager, sender, EMPATHY_IMAGE_NEW_MESSAGE, msg,
               channel, event_channel_process_func, NULL);

    g_free (msg);
}

static void
event_manager_filter_channel_cb (EmpathyDispatcher   *dispatcher,
                 TpChannel           *channel,
                 EmpathyEventManager *manager)
{
    gchar *channel_type;

    g_object_get (channel, "channel-type", &channel_type, NULL);
    if (!tp_strdiff (channel_type, TP_IFACE_CHANNEL_TYPE_TEXT)) {
        EmpathyTpChat *tp_chat;

        tp_chat = empathy_tp_chat_new (channel);
        g_signal_connect (tp_chat, "message-received",
                  G_CALLBACK (event_manager_chat_message_received_cb),
                  manager);
    }
    else if (!tp_strdiff (channel_type, TP_IFACE_CHANNEL_TYPE_STREAMED_MEDIA)) {
        EmpathyTpGroup *tp_group;
        EmpathyContact *contact;
        gchar          *msg;

        tp_group = empathy_tp_group_new (channel);
        empathy_run_until_ready (tp_group);
        empathy_tp_group_get_invitation (tp_group, &contact);
        empathy_contact_run_until_ready (contact,
                         EMPATHY_CONTACT_READY_NAME,
                         NULL);

        msg = g_strdup_printf (_("Incoming call from %s"),
                       empathy_contact_get_name (contact));

        event_manager_add (manager, contact, EMPATHY_IMAGE_VOIP, msg,
                   channel, event_channel_process_func, NULL);

        g_free (msg);
        g_object_unref (contact);
        g_object_unref (tp_group);
    }

    g_free (channel_type);
}

static void
event_manager_dispatch_channel_cb (EmpathyDispatcher   *dispatcher,
                   TpChannel           *channel,
                   EmpathyEventManager *manager)
{
    EmpathyEventManagerPriv *priv = GET_PRIV (manager);
    GSList                  *l;

    for (l = priv->events; l; l = l->next) {
        EventPriv *event = l->data;

        if (event->channel &&
            empathy_proxy_equal (channel, event->channel)) {
            event_remove (event);
            break;
        }
    }
}

#define TUBE_NO_APP_MESSAGE _("%s is offering you an invitation, but " \
                  "you don't have the needed external " \
                  "application to handle it.")

static void
event_tube_process_func (EventPriv *event)
{
    EmpathyEventManagerPriv *priv = GET_PRIV (event->manager);
    EmpathyDispatcherTube   *tube = (EmpathyDispatcherTube*) event->user_data;

    if (tube->activatable) {
        empathy_dispatcher_tube_process (priv->dispatcher, tube);
    } else {
        GtkWidget *dialog;
        gchar     *str;

        /* Tell the user that the tube can't be handled */
        str = g_strdup_printf (TUBE_NO_APP_MESSAGE,
                       empathy_contact_get_name (tube->initiator));

        dialog = gtk_message_dialog_new (NULL, GTK_DIALOG_MODAL,
                         GTK_MESSAGE_ERROR,
                         GTK_BUTTONS_OK,
                         "%s", str);
        gtk_window_set_title (GTK_WINDOW (dialog),
                      _("Invitation Error"));
        g_free (str);

        gtk_widget_show (dialog);
        g_signal_connect (dialog, "response",
                  G_CALLBACK (gtk_widget_destroy),
                  NULL);
    }

    empathy_dispatcher_tube_unref (tube);
    event_remove (event);
}

static void
event_manager_filter_tube_cb (EmpathyDispatcher     *dispatcher,
                  EmpathyDispatcherTube *tube,
                  EmpathyEventManager   *manager)
{
    const gchar *icon_name;
    gchar       *msg;

    empathy_contact_run_until_ready (tube->initiator,
                     EMPATHY_CONTACT_READY_NAME, NULL);

    if (tube->activatable) {
        icon_name = GTK_STOCK_EXECUTE;
        msg = g_strdup_printf (_("%s is offering you an invitation. An external "
                     "application will be started to handle it."),
                       empathy_contact_get_name (tube->initiator));
    } else {
        icon_name = GTK_STOCK_DIALOG_ERROR;
        msg = g_strdup_printf (TUBE_NO_APP_MESSAGE,
                       empathy_contact_get_name (tube->initiator));
    }

    event_manager_add (manager, tube->initiator, icon_name, msg,
               tube->channel, event_tube_process_func,
               empathy_dispatcher_tube_ref (tube));

    g_free (msg);
}

static void
event_pending_subscribe_func (EventPriv *event)
{
    empathy_subscription_dialog_show (event->public.contact, NULL);
    event_remove (event);
}

static void
event_manager_pendings_changed_cb (EmpathyContactList  *list,
                   EmpathyContact      *contact,
                   EmpathyContact      *actor,
                   guint                reason,
                   gchar               *message,
                   gboolean             is_pending,
                   EmpathyEventManager *manager)
{
    EmpathyEventManagerPriv *priv = GET_PRIV (manager);
    GString                 *str;

    if (!is_pending) {
        GSList *l;

        for (l = priv->events; l; l = l->next) {
            EventPriv *event = l->data;

            if (event->public.contact == contact &&
                event->func == event_pending_subscribe_func) {
                event_remove (event);
                break;
            }
        }

        return;
    }

    empathy_contact_run_until_ready (contact,
                     EMPATHY_CONTACT_READY_NAME,
                     NULL);

    str = g_string_new (NULL);
    g_string_printf (str, _("Subscription requested by %s"),
             empathy_contact_get_name (contact));   
    if (!G_STR_EMPTY (message)) {
        g_string_append_printf (str, _("\nMessage: %s"), message);
    }

    event_manager_add (manager, contact, GTK_STOCK_DIALOG_QUESTION, str->str,
               NULL, event_pending_subscribe_func, NULL);

    g_string_free (str, TRUE);
}

static void
event_manager_finalize (GObject *object)
{
    EmpathyEventManagerPriv *priv = GET_PRIV (object);

    g_slist_foreach (priv->events, (GFunc) event_free, NULL);
    g_slist_free (priv->events);
    g_object_unref (priv->contact_manager);
    g_object_unref (priv->dispatcher);
}

static void
empathy_event_manager_class_init (EmpathyEventManagerClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);

    object_class->finalize = event_manager_finalize;

    signals[EVENT_ADDED] =
        g_signal_new ("event-added",
                  G_TYPE_FROM_CLASS (klass),
                  G_SIGNAL_RUN_LAST,
                  0,
                  NULL, NULL,
                  g_cclosure_marshal_VOID__POINTER,
                  G_TYPE_NONE,
                  1, G_TYPE_POINTER);

    signals[EVENT_REMOVED] =
        g_signal_new ("event-removed",
                  G_TYPE_FROM_CLASS (klass),
                  G_SIGNAL_RUN_LAST,
                  0,
                  NULL, NULL,
                  g_cclosure_marshal_VOID__POINTER,
                  G_TYPE_NONE,
                  1, G_TYPE_POINTER);

    g_type_class_add_private (object_class, sizeof (EmpathyEventManagerPriv));
}

static void
empathy_event_manager_init (EmpathyEventManager *manager)
{
    EmpathyEventManagerPriv *priv = G_TYPE_INSTANCE_GET_PRIVATE (manager,
        EMPATHY_TYPE_EVENT_MANAGER, EmpathyEventManagerPriv);

    manager->priv = priv;

    priv->dispatcher = empathy_dispatcher_new ();
    priv->contact_manager = empathy_contact_manager_new ();
    g_signal_connect (priv->dispatcher, "filter-channel",
              G_CALLBACK (event_manager_filter_channel_cb),
              manager);
    g_signal_connect (priv->dispatcher, "dispatch-channel",
              G_CALLBACK (event_manager_dispatch_channel_cb),
              manager);
    g_signal_connect (priv->dispatcher, "filter-tube",
              G_CALLBACK (event_manager_filter_tube_cb),
              manager);
    g_signal_connect (priv->contact_manager, "pendings-changed",
              G_CALLBACK (event_manager_pendings_changed_cb),
              manager);
}

EmpathyEventManager *
empathy_event_manager_new (void)
{
    static EmpathyEventManager *manager = NULL;

    if (!manager) {
        manager = g_object_new (EMPATHY_TYPE_EVENT_MANAGER, NULL);
        g_object_add_weak_pointer (G_OBJECT (manager), (gpointer) &manager);
    } else {
        g_object_ref (manager);
    }

    return manager;
}

GSList *
empathy_event_manager_get_events (EmpathyEventManager *manager)
{
    EmpathyEventManagerPriv *priv = GET_PRIV (manager);

    g_return_val_if_fail (EMPATHY_IS_EVENT_MANAGER (manager), NULL);

    return priv->events;
}

EmpathyEvent *
empathy_event_manager_get_top_event (EmpathyEventManager *manager)
{
    EmpathyEventManagerPriv *priv = GET_PRIV (manager);

    g_return_val_if_fail (EMPATHY_IS_EVENT_MANAGER (manager), NULL);

    return priv->events ? priv->events->data : NULL;
}

void
empathy_event_activate (EmpathyEvent *event_public)
{
    EventPriv *event = (EventPriv*) event_public;

    g_return_if_fail (event_public != NULL);

    if (event->func) {
        event->func (event);
    } else {
        event_remove (event);
    }
}