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-rw-r--r--calendar/cal-backend.c498
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diff --git a/calendar/cal-backend.c b/calendar/cal-backend.c
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--- a/calendar/cal-backend.c
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-/* Evolution calendar backend
- *
- * 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 "cal-backend.h"
-#include "calobj.h"
-#include "../libversit/vcc.h"
-
-
-
-/* VCalendar product ID */
-#define PRODID "-//Helix Code//NONSGML Tlacuache//EN"
-
-
-
-/* Private part of the CalBackend structure */
-typedef struct {
- /* URI where the calendar data is stored */
- GnomeVFSURI *uri;
-
- /* List of Cal client interface objects, each with its listener */
- GList *clients;
-
- /* All the iCalObject structures in the calendar, hashed by UID. The
- * hash key *is* icalobj->uid; it is not copied, so don't free it when
- * you remove an object from the hash table.
- */
- GHashTable *object_hash;
-
- /* All events, TODOs, and journals in the calendar */
- GList *events;
- GList *todos;
- GList *journals;
-
- /* Whether a calendar has been loaded */
- guint loaded : 1;
-} CalBackendPrivate;
-
-
-
-static void cal_backend_class_init (CalBackendClass *class);
-static void cal_backend_init (CalBackend *backend);
-static void cal_backend_destroy (GtkObject *object);
-
-static GtkObjectClass *parent_class;
-
-
-
-/**
- * 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) cal_backend_init,
- 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);
-
- object_class->destroy = cal_backend_destroy;
-}
-
-/* Object initialization function for the calendar backend */
-static void
-cal_backend_init (CalBackend *backend)
-{
- CalBackendPrivate *priv;
-
- priv = g_new0 (CalBackendPrivate, 1);
- backend->priv = priv;
-}
-
-/* Destroy handler for the calendar backend */
-static void
-cal_backend_destroy (GtkObject *object)
-{
- CalBackend *backend;
- CalBackendPrivate *priv;
-
- g_return_if_fail (object != NULL);
- g_return_if_fail (IS_CAL_BACKEND (object));
-
- backend = CAL_BACKEND (object);
- priv = backend->priv;
-
- /* FIXME: free stuff */
-
- g_free (priv);
-
- if (GTK_OBJECT_CLASS (parent_class)->destroy)
- (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
-}
-
-
-
-/* iCalObject manipulation functions */
-
-/* Ensures that an iCalObject has a unique identifier. If it doesn't have one,
- * it will create one for it. Returns whether an UID was created or not.
- */
-static gboolean
-ensure_uid (iCalObject *ico)
-{
- char *buf;
- gulong str_time;
- static guint seqno = 0;
-
- if (ico->uid)
- return FALSE;
-
- str_time = (gulong) time (NULL);
-
- /* Is this good enough? */
-
- buf = g_strdup_printf ("Evolution-Tlacuache-%d-%ld-%u", (int) getpid(), str_time, seqno++);
- ico->uid = buf;
-
- return TRUE;
-}
-
-/* Adds an object to the calendar backend. Does *not* perform notification to
- * calendar clients.
- */
-static void
-add_object (CalBackend *backend, iCalObject *ico)
-{
- CalBackendPrivate *priv;
-
- g_assert (ico != NULL);
- priv = backend->priv;
-
-#if 0
- /* FIXME: gnomecal old code */
- ico->new = 0;
-#endif
-
- if (ensure_uid (ico))
- /* FIXME: mark the calendar as dirty so that we can re-save it
- * with the object's new UID.
- */
- ;
-
- g_hash_table_insert (priv->object_hash, ico->uid, ico);
-
- switch (ico->type) {
- case ICAL_EVENT:
- priv->events = g_list_prepend (priv->events, ico);
-#if 0
- /* FIXME: gnomecal old code */
- ical_object_try_alarms (ico);
-# ifdef DEBUGGING_MAIL_ALARM
- ico->malarm.trigger = 0;
- calendar_notify (0, ico);
-# endif
-#endif
- break;
-
- case ICAL_TODO:
- priv->todos = g_list_prepend (priv->todos, ico);
- break;
-
- case ICAL_JOURNAL:
- priv->journals = g_list_prepend (priv->journals, ico);
- break;
-
- default:
- g_assert_not_reached ();
- }
-
-#if 0
- /* FIXME: gnomecal old code */
- ico->last_mod = time (NULL);
-#endif
-}
-
-/* Load a calendar from a VObject */
-static void
-load_from_vobject (CalBackend *backend, VObject *vobject)
-{
- CalBackendPrivate *priv;
- VObjectIterator i;
-
- priv = backend->priv;
-
- g_assert (!priv->loaded);
- g_assert (priv->object_hash == NULL);
- priv->object_hash = g_hash_table_new (g_str_hash, g_str_equal);
-
- initPropIterator (&i, vobject);
-
- while (moreIteration (&i)) {
- VObject *this;
- iCalObject *ical;
- const char *object_name;
-
- this = nextVObject (&i);
- object_name = vObjectName (this);
-#if 0
- /* FIXME? What is this used for in gnomecal? */
- if (strcmp (object_name, VCDCreatedProp) == 0) {
- cal->created = time_from_isodate (str_val (this));
- continue;
- }
-#endif
- if (strcmp (object_name, VCLocationProp) == 0)
- continue; /* FIXME: imlement */
-
- if (strcmp (object_name, VCProdIdProp) == 0)
- continue; /* FIXME: implement */
-
- if (strcmp (object_name, VCVersionProp) == 0)
- continue; /* FIXME: implement */
-
- if (strcmp (object_name, VCTimeZoneProp) == 0)
- continue; /* FIXME: implement */
-
- ical = ical_object_create_from_vobject (this, object_name);
-
- if (ical)
- add_object (backend, ical);
- }
-}
-
-/* Creates a VObject with the base information of a calendar */
-static VObject *
-get_calendar_base_vobject (CalBackend *backend)
-{
- VObject *vobj;
- time_t now;
- struct tm tm;
-
- /* We call localtime for the side effect of setting tzname */
-
- now = time (NULL);
- tm = *localtime (&now);
-
- vobj = newVObject (VCCalProp);
-
- addPropValue (vobj, VCProdIdProp, PRODID);
-
-#if defined (HAVE_TM_ZONE)
- addPropValue (vobj, VCTimeZoneProp, tm.tm_zone);
-#elif defined (HAVE_TZNAME)
- addPropValue (vobj, VCTimeZoneProp, tzname[0]);
-#endif
-
- /* Per the vCalendar spec, this must be "1.0" */
- addPropValue (vobj, VCVersionProp, "1.0");
-
- return vobj;
-}
-
-
-
-/**
- * cal_backend_new:
- * @void:
- *
- * Creates a new empty calendar backend. A calendar must then be loaded or
- * created before the backend can be used.
- *
- * Return value: A newly-created calendar backend.
- **/
-CalBackend *
-cal_backend_new (void)
-{
- return CAL_BACKEND (gtk_type_new (CAL_BACKEND_TYPE));
-}
-
-/**
- * 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)
-{
- CalBackendPrivate *priv;
-
- g_return_val_if_fail (backend != NULL, NULL);
- g_return_val_if_fail (IS_CAL_BACKEND (backend), NULL);
-
- priv = backend->priv;
- g_return_val_if_fail (priv->loaded, NULL);
- g_assert (priv->uri != NULL);
-
- return priv->uri;
-}
-
-/**
- * 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)
-{
- CalBackendPrivate *priv;
-
- g_return_if_fail (backend != NULL);
- g_return_if_fail (IS_CAL_BACKEND (backend));
-
- priv = backend->priv;
- g_return_if_fail (priv->loaded);
-
- g_return_if_fail (cal != NULL);
- g_return_if_fail (IS_CAL (cal));
-
- gtk_object_ref (GTK_OBJECT (cal));
- priv->clients = g_list_prepend (priv->clients, cal);
-}
-
-/**
- * cal_backend_remove_cal:
- * @backend: A calendar backend.
- * @cal: A calendar client interface object.
- *
- * Removes a calendar client interface object from a calendar backend. The
- * calendar backend must already have a loaded calendar.
- **/
-void
-cal_backend_remove_cal (CalBackend *backend, Cal *cal)
-{
- CalBackendPrivate *priv;
- GList *l;
-
- g_return_if_fail (backend != NULL);
- g_return_if_fail (IS_CAL_BACKEND (backend));
-
- priv = backend->priv;
- g_return_if_fail (priv->loaded);
-
- g_return_if_fail (cal != NULL);
- g_return_if_fail (IS_CAL (cal));
-
- l = g_list_find (priv->clients, cal);
- if (!l)
- return;
-
- gtk_object_unref (GTK_OBJECT (cal));
- priv->clients = g_list_remove_link (priv->clients, l);
- g_list_free_1 (l);
-}
-
-/**
- * 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)
-{
- CalBackendPrivate *priv;
- VObject *vobject;
- char *str_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);
-
- priv = backend->priv;
- g_return_val_if_fail (!priv->loaded, CAL_BACKEND_LOAD_ERROR);
-
- /* FIXME: this looks rather bad; maybe we should check for local files
- * and fail if they are remote.
- */
-
- str_uri = gnome_vfs_uri_to_string (uri,
- (GNOME_VFS_URI_HIDE_USER_NAME
- | GNOME_VFS_URI_HIDE_PASSWORD
- | GNOME_VFS_URI_HIDE_HOST_NAME
- | GNOME_VFS_URI_HIDE_HOST_PORT
- | GNOME_VFS_URI_HIDE_TOPLEVEL_METHOD));
-
- vobject = Parse_MIME_FromFileName (str_uri);
- g_free (str_uri);
-
- if (!vobject)
- return CAL_BACKEND_LOAD_ERROR;
-
- load_from_vobject (backend, vobject);
- cleanVObject (vobject);
- cleanStrTbl ();
-
- gnome_vfs_uri_ref (uri);
-
- priv->uri = uri;
- priv->loaded = TRUE;
- return CAL_BACKEND_LOAD_SUCCESS;
-}
-
-/**
- * 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)
-{
- CalBackendPrivate *priv;
- iCalObject *ico;
- VObject *vcalobj, *vobj;
- char *buf;
-
- g_return_val_if_fail (backend != NULL, NULL);
- g_return_val_if_fail (IS_CAL_BACKEND (backend), NULL);
-
- priv = backend->priv;
- g_return_val_if_fail (priv->loaded, NULL);
-
- g_return_val_if_fail (uid != NULL, NULL);
-
- g_assert (priv->object_hash != NULL);
-
- ico = g_hash_table_lookup (priv->objec_hash, uid);
-
- if (!ico)
- return NULL;
-
- vcalobj = get_calendar_base_vobject (backend);
- vobj = ical_object_to_vobject (ico);
- addVObjectProp (vcalobj, vobj);
-
- buf = writeMemVObject (NULL, NULL, vcalobj);
-
- cleanVObject (vcalobj);
- cleanStrTbl ();
-
- return buf;
-}