/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* Evolution calendar - generic backend class
*
* Copyright (C) 2000 Helix Code, Inc.
*
* Author: Federico Mena-Quintero <federico@helixcode.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.
*/
#include <config.h>
#include <gtk/gtksignal.h>
#include <cal-util/calobj.h>
#include "cal-backend.h"
#include "libversit/vcc.h"
/* Signal IDs */
enum {
LAST_CLIENT_GONE,
LAST_SIGNAL
};
static void cal_backend_class_init (CalBackendClass *class);
static GtkObjectClass *parent_class;
static guint cal_backend_signals[LAST_SIGNAL];
#define CLASS(backend) (CAL_BACKEND_CLASS (GTK_OBJECT (backend)->klass))
/**
* cal_backend_get_type:
* @void:
*
* Registers the #CalBackend class if necessary, and returns the type ID
* associated to it.
*
* Return value: The type ID of the #CalBackend class.
**/
GtkType
cal_backend_get_type (void)
{
static GtkType cal_backend_type = 0;
if (!cal_backend_type) {
static const GtkTypeInfo cal_backend_info = {
"CalBackend",
sizeof (CalBackend),
sizeof (CalBackendClass),
(GtkClassInitFunc) cal_backend_class_init,
(GtkObjectInitFunc) NULL,
NULL, /* reserved_1 */
NULL, /* reserved_2 */
(GtkClassInitFunc) NULL
};
cal_backend_type =
gtk_type_unique (GTK_TYPE_OBJECT, &cal_backend_info);
}
return cal_backend_type;
}
/* Class initialization function for the calendar backend */
static void
cal_backend_class_init (CalBackendClass *class)
{
GtkObjectClass *object_class;
object_class = (GtkObjectClass *) class;
parent_class = gtk_type_class (GTK_TYPE_OBJECT);
cal_backend_signals[LAST_CLIENT_GONE] =
gtk_signal_new ("last_client_gone",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (CalBackendClass, last_client_gone),
gtk_marshal_NONE__NONE,
GTK_TYPE_NONE, 0);
gtk_object_class_add_signals (object_class, cal_backend_signals, LAST_SIGNAL);
}
/**
* cal_backend_get_uri:
* @backend: A calendar backend.
*
* Queries the URI of a calendar backend, which must already have a loaded
* calendar.
*
* Return value: The URI where the calendar is stored.
**/
GnomeVFSURI *
cal_backend_get_uri (CalBackend *backend)
{
g_return_val_if_fail (backend != NULL, NULL);
g_return_val_if_fail (IS_CAL_BACKEND (backend), NULL);
g_assert (CLASS (backend)->get_uri != NULL);
return (* CLASS (backend)->get_uri) (backend);
}
/**
* cal_backend_add_cal:
* @backend: A calendar backend.
* @cal: A calendar client interface object.
*
* Adds a calendar client interface object to a calendar @backend.
* The calendar backend must already have a loaded calendar.
**/
void
cal_backend_add_cal (CalBackend *backend, Cal *cal)
{
g_return_if_fail (backend != NULL);
g_return_if_fail (IS_CAL_BACKEND (backend));
g_assert (CLASS (backend)->add_cal != NULL);
(* CLASS (backend)->add_cal) (backend, cal);
}
/**
* cal_backend_load:
* @backend: A calendar backend.
* @uri: URI that contains the calendar data.
*
* Loads a calendar backend with data from a calendar stored at the specified
* URI.
*
* Return value: An operation status code.
**/
CalBackendLoadStatus
cal_backend_load (CalBackend *backend, GnomeVFSURI *uri)
{
g_return_val_if_fail (backend != NULL, CAL_BACKEND_LOAD_ERROR);
g_return_val_if_fail (IS_CAL_BACKEND (backend), CAL_BACKEND_LOAD_ERROR);
g_return_val_if_fail (uri != NULL, CAL_BACKEND_LOAD_ERROR);
g_assert (CLASS (backend)->load != NULL);
return (* CLASS (backend)->load) (backend, uri);
}
/**
* cal_backend_create:
* @backend: A calendar backend.
* @uri: URI that will contain the calendar data.
*
* Creates a new empty calendar in a calendar backend.
**/
void
cal_backend_create (CalBackend *backend, GnomeVFSURI *uri)
{
g_return_if_fail (backend != NULL);
g_return_if_fail (IS_CAL_BACKEND (backend));
g_return_if_fail (uri != NULL);
g_assert (CLASS (backend)->create != NULL);
(* CLASS (backend)->create) (backend, uri);
}
/**
* cal_backend_get_n_objects:
* @backend: A calendar backend.
* @type: Types of objects that will be included in the count.
*
* Queries the number of calendar objects of a particular type.
*
* Return value: Number of objects of the specified @type.
**/
int
cal_backend_get_n_objects (CalBackend *backend, CalObjType type)
{
g_return_val_if_fail (backend != NULL, -1);
g_return_val_if_fail (IS_CAL_BACKEND (backend), -1);
g_assert (CLASS (backend)->get_n_objects != NULL);
return (* CLASS (backend)->get_n_objects) (backend, type);
}
/**
* cal_backend_get_object:
* @backend: A calendar backend.
* @uid: Unique identifier for a calendar object.
*
* Queries a calendar backend for a calendar object based on its unique
* identifier.
*
* Return value: The string representation of a complete calendar wrapping the
* the sought object, or NULL if no object had the specified UID. A complete
* calendar is returned because you also need the timezone data.
**/
char *
cal_backend_get_object (CalBackend *backend, const char *uid)
{
g_return_val_if_fail (backend != NULL, NULL);
g_return_val_if_fail (IS_CAL_BACKEND (backend), NULL);
g_return_val_if_fail (uid != NULL, NULL);
g_assert (CLASS (backend)->get_object != NULL);
return (* CLASS (backend)->get_object) (backend, uid);
}
/**
* cal_backend_get_uids:
* @backend: A calendar backend.
* @type: Bitmask with types of objects to return.
*
* Builds a list of unique identifiers corresponding to calendar objects whose
* type matches one of the types specified in the @type flags.
*
* Return value: A list of strings that are the sought UIDs.
**/
GList *
cal_backend_get_uids (CalBackend *backend, CalObjType type)
{
g_return_val_if_fail (backend != NULL, NULL);
g_return_val_if_fail (IS_CAL_BACKEND (backend), NULL);
g_assert (CLASS (backend)->get_uids != NULL);
return (* CLASS (backend)->get_uids) (backend, type);
}
/**
* cal_backend_get_events_in_range:
* @backend: A calendar backend.
* @start: Start time for query.
* @end: End time for query.
*
* Builds a sorted list of calendar event object instances that occur or recur
* within the specified time range. Each object instance contains the object
* itself and the start/end times at which it occurs or recurs.
*
* Return value: A list of calendar event object instances, sorted by their
* start times.
**/
GList *
cal_backend_get_events_in_range (CalBackend *backend, time_t start, time_t end)
{
g_return_val_if_fail (backend != NULL, NULL);
g_return_val_if_fail (IS_CAL_BACKEND (backend), NULL);
g_return_val_if_fail (start != -1 && end != -1, NULL);
g_return_val_if_fail (start <= end, NULL);
g_assert (CLASS (backend)->get_events_in_range != NULL);
return (* CLASS (backend)->get_events_in_range) (backend, start, end);
}
/**
* cal_backend_get_alarms_in_range:
* @backend: A calendar backend.
* @start: Start time for query.
* @end: End time for query.
*
* Builds a sorted list of the alarms that trigger in the specified time range.
*
* Return value: A list of #CalAlarmInstance structures, sorted by trigger time.
**/
GList *
cal_backend_get_alarms_in_range (CalBackend *backend, time_t start, time_t end)
{
g_return_val_if_fail (backend != NULL, NULL);
g_return_val_if_fail (IS_CAL_BACKEND (backend), NULL);
g_return_val_if_fail (start != -1 && end != -1, NULL);
g_return_val_if_fail (start <= end, NULL);
g_assert (CLASS (backend)->get_alarms_in_range != NULL);
return (* CLASS (backend)->get_alarms_in_range) (backend, start, end);
}
/**
* cal_backend_get_alarms_for_object:
* @backend: A calendar backend.
* @uid: Unique identifier for a calendar object.
* @start: Start time for query.
* @end: End time for query.
* @alarms: Return value for the list of alarm instances.
*
* Builds a sorted list of the alarms of the specified event that trigger in a
* particular time range.
*
* Return value: TRUE on success, FALSE if the object was not found.
**/
gboolean
cal_backend_get_alarms_for_object (CalBackend *backend, const char *uid,
time_t start, time_t end,
GList **alarms)
{
g_return_val_if_fail (backend != NULL, FALSE);
g_return_val_if_fail (IS_CAL_BACKEND (backend), FALSE);
g_return_val_if_fail (uid != NULL, FALSE);
g_return_val_if_fail (start != -1 && end != -1, FALSE);
g_return_val_if_fail (start <= end, FALSE);
g_return_val_if_fail (alarms != NULL, FALSE);
g_assert (CLASS (backend)->get_alarms_for_object != NULL);
return (* CLASS (backend)->get_alarms_for_object) (backend, uid, start, end, alarms);
}
/**
* cal_backend_update_object:
* @backend: A calendar backend.
* @uid: Unique identifier of the object to update.
* @calobj: String representation of the new calendar object.
*
* Updates an object in a calendar backend. It will replace any existing
* object that has the same UID as the specified one. The backend will in
* turn notify all of its clients about the change.
*
* Return value: TRUE on success, FALSE on being passed an invalid object.
**/
gboolean
cal_backend_update_object (CalBackend *backend, const char *uid, const char *calobj)
{
g_return_val_if_fail (backend != NULL, FALSE);
g_return_val_if_fail (IS_CAL_BACKEND (backend), FALSE);
g_return_val_if_fail (uid != NULL, FALSE);
g_return_val_if_fail (calobj != NULL, FALSE);
g_assert (CLASS (backend)->update_object != NULL);
return (* CLASS (backend)->update_object) (backend, uid, calobj);
}
/**
* cal_backend_remove_object:
* @backend: A calendar backend.
* @uid: Unique identifier of the object to remove.
*
* Removes an object in a calendar backend. The backend will notify all of its
* clients about the change.
*
* Return value: TRUE on success, FALSE on being passed an UID for an object
* that does not exist in the backend.
**/
gboolean
cal_backend_remove_object (CalBackend *backend, const char *uid)
{
g_return_val_if_fail (backend != NULL, FALSE);
g_return_val_if_fail (IS_CAL_BACKEND (backend), FALSE);
g_return_val_if_fail (uid != NULL, FALSE);
g_assert (CLASS (backend)->remove_object != NULL);
return (* CLASS (backend)->remove_object) (backend, uid);
}
/**
* cal_backend_last_client_gone:
* @backend: A calendar backend.
*
* Emits the "last_client_gone" signal of a calendar backend. This function is
* to be used only by backend implementations.
**/
void
cal_backend_last_client_gone (CalBackend *backend)
{
g_return_if_fail (backend != NULL);
g_return_if_fail (IS_CAL_BACKEND (backend));
gtk_signal_emit (GTK_OBJECT (backend), cal_backend_signals[LAST_CLIENT_GONE]);
}
