path: root/calendar/gui/alarm-notify/alarm-notify.c

/* Evolution calendar - Alarm notification service object
 *
 * Copyright (C) 2001 Ximian, Inc.
 *
 * Author: Federico Mena-Quintero <federico@ximian.com>
 *
 * 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.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <libgnomevfs/gnome-vfs.h>
#include <cal-client/cal-client.h>
#include "alarm-notify.h"
#include "alarm-queue.h"



/* A loaded client */
typedef struct {
    /* The actual client */
    CalClient *client;

    /* The URI of the client in gnome-vfs's format.  This *is* the key that
     * is stored in the uri_client_hash hash table below.
     */
    GnomeVFSURI *uri;

    /* Number of times clients have requested this URI to be added to the
     * alarm notification system.
     */
    int refcount;
} LoadedClient;

/* Private part of the AlarmNotify structure */
struct _AlarmNotifyPrivate {
    /* Mapping from GnomeVFSURIs to LoadedClient structures */
    GHashTable *uri_client_hash;
};



static void alarm_notify_class_init (AlarmNotifyClass *class);
static void alarm_notify_init (AlarmNotify *an);
static void alarm_notify_destroy (GtkObject *object);

static void AlarmNotify_addCalendar (PortableServer_Servant servant,
                     const CORBA_char *str_uri,
                     CORBA_Environment *ev);
static void AlarmNotify_removeCalendar (PortableServer_Servant servant,
                    const CORBA_char *str_uri,
                    CORBA_Environment *ev);
static void AlarmNotify_die (PortableServer_Servant servant,
                 CORBA_Environment *ev);


static BonoboXObjectClass *parent_class;



BONOBO_X_TYPE_FUNC_FULL (AlarmNotify,
             GNOME_Evolution_Calendar_AlarmNotify,
             BONOBO_X_OBJECT_TYPE,
             alarm_notify);

/* Class initialization function for the alarm notify service */
static void
alarm_notify_class_init (AlarmNotifyClass *class)
{
    GtkObjectClass *object_class;

    object_class = (GtkObjectClass *) class;

    parent_class = gtk_type_class (BONOBO_X_OBJECT_TYPE);

    class->epv.addCalendar = AlarmNotify_addCalendar;
    class->epv.removeCalendar = AlarmNotify_removeCalendar;
    class->epv.die = AlarmNotify_die;

    object_class->destroy = alarm_notify_destroy;
}

/* Object initialization function for the alarm notify system */
static void
alarm_notify_init (AlarmNotify *an)
{
    AlarmNotifyPrivate *priv;

    priv = g_new0 (AlarmNotifyPrivate, 1);
    an->priv = priv;

    priv->uri_client_hash = g_hash_table_new (gnome_vfs_uri_hash, gnome_vfs_uri_hequal);
}

/* Callback used from g_hash-table_forach(), used to destroy a loade client */
static void
destroy_loaded_client_cb (gpointer key, gpointer value, gpointer data)
{
    LoadedClient *lc;

    lc = value;

    gtk_object_unref (GTK_OBJECT (lc->client));
    gnome_vfs_uri_unref (lc->uri);
    g_free (lc);
}

/* Destroy handler for the alarm notify system */
static void
alarm_notify_destroy (GtkObject *object)
{
    AlarmNotify *an;
    AlarmNotifyPrivate *priv;

    g_return_if_fail (object != NULL);
    g_return_if_fail (IS_ALARM_NOTIFY (object));

    an = ALARM_NOTIFY (object);
    priv = an->priv;

    g_hash_table_foreach (priv->uri_client_hash, destroy_loaded_client_cb, NULL);

    g_hash_table_destroy (priv->uri_client_hash);
    priv->uri_client_hash = NULL;

    g_free (priv);
    an->priv = NULL;

    if (GTK_OBJECT_CLASS (parent_class)->destroy)
        (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}



/* CORBA servant implementation */

/* AlarmNotify::addCalendar method */
static void
AlarmNotify_addCalendar (PortableServer_Servant servant,
             const CORBA_char *str_uri,
             CORBA_Environment *ev)
{
    AlarmNotify *an;
    AlarmNotifyPrivate *priv;
    GnomeVFSURI *uri;
    CalClient *client;
    LoadedClient *lc;

    an = ALARM_NOTIFY (bonobo_object_from_servant (servant));
    priv = an->priv;

    uri = gnome_vfs_uri_new (str_uri);
    if (!uri) {
        CORBA_exception_set (ev, CORBA_USER_EXCEPTION,
                     ex_GNOME_Evolution_Calendar_AlarmNotify_InvalidURI,
                     NULL);
        return;
    }

    lc = g_hash_table_lookup (priv->uri_client_hash, uri);

    if (lc) {
        gnome_vfs_uri_unref (uri);
        g_assert (lc->refcount > 0);
        lc->refcount++;
        return;
    }

    client = cal_client_new ();

    if (client) {
        if (cal_client_open_calendar (client, str_uri, FALSE)) {
            lc = g_new (LoadedClient, 1);
            lc->client = client;
            lc->uri = uri;
            lc->refcount = 1;
            g_hash_table_insert (priv->uri_client_hash, uri, lc);

            alarm_queue_add_client (client);
        } else {
            gtk_object_unref (GTK_OBJECT (client));
            client = NULL;
        }
    }

    if (!client) {
        gnome_vfs_uri_unref (uri);

        CORBA_exception_set (ev, CORBA_USER_EXCEPTION,
                     ex_GNOME_Evolution_Calendar_AlarmNotify_BackendContactError,
                     NULL);
        return;
    }
}

/* AlarmNotify::removeCalendar method */
static void
AlarmNotify_removeCalendar (PortableServer_Servant servant,
                const CORBA_char *str_uri,
                CORBA_Environment *ev)
{
    AlarmNotify *an;
    AlarmNotifyPrivate *priv;
    LoadedClient *lc;
    GnomeVFSURI *uri;

    an = ALARM_NOTIFY (bonobo_object_from_servant (servant));
    priv = an->priv;

    uri = gnome_vfs_uri_new (str_uri);
    if (!uri) {
        CORBA_exception_set (ev, CORBA_USER_EXCEPTION,
                     ex_GNOME_Evolution_Calendar_AlarmNotify_InvalidURI,
                     NULL);
        return;
    }

    lc = g_hash_table_lookup (priv->uri_client_hash, uri);
    gnome_vfs_uri_unref (uri);

    if (!lc) {
        CORBA_exception_set (ev, CORBA_USER_EXCEPTION,
                     ex_GNOME_Evolution_Calendar_AlarmNotify_NotFound,
                     NULL);
        return;
    }

    g_assert (lc->refcount > 0);

    lc->refcount--;
    if (lc->refcount > 0)
        return;

    g_hash_table_remove (priv->uri_client_hash, lc->uri);

    gtk_object_unref (GTK_OBJECT (lc->client));
    gnome_vfs_uri_unref (lc->uri);
    g_free (lc);
}

static void
AlarmNotify_die (PortableServer_Servant servant,
         CORBA_Environment *ev)
{
    AlarmNotify *an;
    AlarmNotifyPrivate *priv;

    an = ALARM_NOTIFY (bonobo_object_from_servant (servant));
    priv = an->priv;

    /* FIXME */
}



/**
 * alarm_notify_new:
 * 
 * Creates a new #AlarmNotify object.
 * 
 * Return value: A newly-created #AlarmNotify, or NULL if its corresponding
 * CORBA object could not be created.
 **/
AlarmNotify *
alarm_notify_new (void)
{
    AlarmNotify *an;

    an = gtk_type_new (TYPE_ALARM_NOTIFY);
    return an;
}