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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * Copyright (C) 2004-2007 Imendio AB
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * Authors: Mikael Hallendal <micke@imendio.com>
 */

#include "config.h"

#include <string.h>

#include <glib/gi18n.h>

#include "empathy-presence.h"
#include "empathy-time.h"

#define GET_PRIV(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), EMPATHY_TYPE_PRESENCE, EmpathyPresencePriv))

typedef struct _EmpathyPresencePriv EmpathyPresencePriv;

struct _EmpathyPresencePriv {
    McPresence  state;
    gchar      *status;
    EmpathyTime  timestamp;
};

static void         presence_finalize     (GObject      *object);
static void         presence_get_property (GObject      *object,
                       guint         param_id,
                       GValue       *value,
                       GParamSpec   *pspec);
static void         presence_set_property (GObject      *object,
                       guint         param_id,
                       const GValue *value,
                       GParamSpec   *pspec);

enum {
    PROP_0,
    PROP_STATE,
    PROP_STATUS
};

G_DEFINE_TYPE (EmpathyPresence, empathy_presence, G_TYPE_OBJECT);

static void
empathy_presence_class_init (EmpathyPresenceClass *class)
{
    GObjectClass *object_class;

    object_class = G_OBJECT_CLASS (class);

    object_class->finalize     = presence_finalize;
    object_class->get_property = presence_get_property;
    object_class->set_property = presence_set_property;

    g_object_class_install_property (object_class,
                     PROP_STATE,
                     g_param_spec_int ("state",
                               "Presence State",
                               "The current state of the presence",
                               MC_PRESENCE_UNSET,
                               LAST_MC_PRESENCE,
                               MC_PRESENCE_AVAILABLE,
                               G_PARAM_READWRITE));
    g_object_class_install_property (object_class,
                     PROP_STATUS,
                     g_param_spec_string ("status",
                                  "Presence Status",
                                  "Status string set on presence",
                                  NULL,
                                  G_PARAM_READWRITE));

    g_type_class_add_private (object_class, sizeof (EmpathyPresencePriv));
}

static void
empathy_presence_init (EmpathyPresence *presence)
{
    EmpathyPresencePriv *priv;

    priv = GET_PRIV (presence);

    priv->state = MC_PRESENCE_AVAILABLE;
    priv->status = NULL;
    priv->timestamp = empathy_time_get_current ();
}

static void
presence_finalize (GObject *object)
{
    EmpathyPresencePriv *priv;

    priv = GET_PRIV (object);

    g_free (priv->status);

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

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

    priv = GET_PRIV (object);

    switch (param_id) {
    case PROP_STATE:
        g_value_set_int (value, priv->state);
        break;
    case PROP_STATUS:
        g_value_set_string (value,
                    empathy_presence_get_status (EMPATHY_PRESENCE (object)));
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
        break;
    }
}
static void
presence_set_property (GObject      *object,
               guint         param_id,
               const GValue *value,
               GParamSpec   *pspec)
{
    EmpathyPresencePriv *priv;

    priv = GET_PRIV (object);

    switch (param_id) {
    case PROP_STATE:
        priv->state = g_value_get_int (value);
        break;
    case PROP_STATUS:
        empathy_presence_set_status (EMPATHY_PRESENCE (object),
                        g_value_get_string (value));
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
        break;
    }
}

EmpathyPresence *
empathy_presence_new (void)
{
    return g_object_new (EMPATHY_TYPE_PRESENCE, NULL);
}

EmpathyPresence *
empathy_presence_new_full (McPresence   state,
              const gchar *status)
{
    return g_object_new (EMPATHY_TYPE_PRESENCE,
                 "state", state,
                 "status", status,
                 NULL);
}

const gchar *
empathy_presence_get_status (EmpathyPresence *presence)
{
    EmpathyPresencePriv *priv;

    g_return_val_if_fail (EMPATHY_IS_PRESENCE (presence),
                  _("Offline"));

    priv = GET_PRIV (presence);

    return priv->status;
}

McPresence
empathy_presence_get_state (EmpathyPresence *presence)
{
    EmpathyPresencePriv *priv;

    g_return_val_if_fail (EMPATHY_IS_PRESENCE (presence),
                  MC_PRESENCE_AVAILABLE);

    priv = GET_PRIV (presence);

    return priv->state;
}

void
empathy_presence_set_state (EmpathyPresence *presence,
               McPresence      state)
{
    EmpathyPresencePriv *priv;

    g_return_if_fail (EMPATHY_IS_PRESENCE (presence));

    priv = GET_PRIV (presence);

    priv->state = state;

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

void
empathy_presence_set_status (EmpathyPresence *presence,
                const gchar    *status)
{
    EmpathyPresencePriv *priv;

    priv = GET_PRIV (presence);
    g_return_if_fail (EMPATHY_IS_PRESENCE (presence));

    g_free (priv->status);

    if (status) {
        priv->status = g_strdup (status);
    } else {
        priv->status = NULL;
    }

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

gint
empathy_presence_sort_func (gconstpointer a,
               gconstpointer b)
{
    EmpathyPresencePriv *priv_a;
    EmpathyPresencePriv *priv_b;
    gint                diff;

    g_return_val_if_fail (EMPATHY_IS_PRESENCE (a), 0);
    g_return_val_if_fail (EMPATHY_IS_PRESENCE (b), 0);
     
    priv_a = GET_PRIV (a);
    priv_b = GET_PRIV (b);

    /* 1. State */
    diff = priv_a->state - priv_b->state;
    if (diff != 0) {
        return diff < 1 ? -1 : +1;
    }

    /* 3. Time (newest first) */
    diff = priv_b->timestamp - priv_a->timestamp;
    if (diff != 0) {
        return diff < 1 ? -1 : +1;
    }
        
    /* No real difference */
    return 0;
}

const gchar *
empathy_presence_state_get_default_status (McPresence state)
{
    switch (state) {
    case MC_PRESENCE_AVAILABLE:
        return _("Available");
    case MC_PRESENCE_DO_NOT_DISTURB:
        return _("Busy");
    case MC_PRESENCE_AWAY:
    case MC_PRESENCE_EXTENDED_AWAY:
        return _("Away");
    case MC_PRESENCE_HIDDEN:
    case MC_PRESENCE_OFFLINE:
    case MC_PRESENCE_UNSET:
        return _("Offline");
    default:
        g_assert_not_reached ();
    }

    return NULL;
}

const gchar *
empathy_presence_state_to_str (McPresence state)
{
    switch (state) {
    case MC_PRESENCE_AVAILABLE:
        return "available";
    case MC_PRESENCE_DO_NOT_DISTURB:
        return "busy";
    case MC_PRESENCE_AWAY:
        return "away";
    case MC_PRESENCE_EXTENDED_AWAY:
        return "ext_away";
    case MC_PRESENCE_HIDDEN:
        return "hidden";
    case MC_PRESENCE_OFFLINE:
        return "offline";
    case MC_PRESENCE_UNSET:
        return "unset";
    default:
        g_assert_not_reached ();
    }

    return NULL;
}

McPresence
empathy_presence_state_from_str (const gchar *str)
{
    if (strcmp (str, "available") == 0) {
        return MC_PRESENCE_AVAILABLE;
    } else if ((strcmp (str, "dnd") == 0) || (strcmp (str, "busy") == 0)) {
        return MC_PRESENCE_DO_NOT_DISTURB;
    } else if ((strcmp (str, "away") == 0) || (strcmp (str, "brb") == 0)) {
        return MC_PRESENCE_AWAY;
    } else if ((strcmp (str, "xa") == 0) || (strcmp (str, "ext_away") == 0)) {
        return MC_PRESENCE_EXTENDED_AWAY;
    } else if (strcmp (str, "hidden") == 0) {
        return MC_PRESENCE_HIDDEN;
    } else if (strcmp (str, "offline") == 0) {
        return MC_PRESENCE_OFFLINE;
    } else if (strcmp (str, "unset") == 0) {
        return MC_PRESENCE_UNSET;
    }

    return MC_PRESENCE_AVAILABLE;
}