diff options
Diffstat (limited to 'calendar/pcs/cal-backend.c')
| -rw-r--r-- | calendar/pcs/cal-backend.c | 1129 |
1 files changed, 0 insertions, 1129 deletions
diff --git a/calendar/pcs/cal-backend.c b/calendar/pcs/cal-backend.c deleted file mode 100644 index 353abc9465..0000000000 --- a/calendar/pcs/cal-backend.c +++ /dev/null @@ -1,1129 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ -/* 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 <gtk/gtksignal.h> -#include <cal-util/calobj.h> -#include "cal-backend.h" -#include "libversit/vcc.h" -#include "icalendar.h" - - - - -/* Private part of the CalBackend structure */ -typedef struct { - /* URI where the calendar data is stored */ - GnomeVFSURI *uri; - - /* format of this calendar (ical or vcal) */ - CalendarFormat format; - - /* List of Cal objects with their listeners */ - 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; - - /* Do we need to sync to permanent storage? */ - gboolean dirty : 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; - - /* FIXME can be CAL_VCAL or CAL_ICAL */ - priv->format = CAL_VCAL; -} - -static void save_to_vcal (CalBackend *backend, char *fname) -{ - FILE *fp; - CalBackendPrivate *priv = backend->priv; - VObject *vcal; - GList *l; - - if (g_file_exists (fname)){ - char *backup_name = g_strconcat (fname, "~", NULL); - - if (g_file_exists (backup_name)){ - unlink (backup_name); - } - rename (fname, backup_name); - g_free (backup_name); - } - - vcal = newVObject (VCCalProp); - addPropValue (vcal, VCProdIdProp, - "-//GNOME//NONSGML GnomeCalendar//EN"); - addPropValue (vcal, VCVersionProp, VERSION); - - for (l = priv->events; l; l = l->next) { - iCalObject *ical = l->data; - VObject *vobject = ical_object_to_vobject (ical); - addVObjectProp (vcal, vobject); - } - for (l = priv->todos; l; l = l->next) { - iCalObject *ical = l->data; - VObject *vobject = ical_object_to_vobject (ical); - addVObjectProp (vcal, vobject); - } - for (l = priv->journals; l; l = l->next) { - iCalObject *ical = l->data; - VObject *vobject = ical_object_to_vobject (ical); - addVObjectProp (vcal, vobject); - } - - fp = fopen(fname,"w"); - if (fp) { - writeVObject(fp, vcal); - fclose(fp); - } - cleanStrTbl (); -} - - -/* Saves a calendar */ -static void -save (CalBackend *backend) -{ - char *str_uri; - CalBackendPrivate *priv = backend->priv; - - str_uri = gnome_vfs_uri_to_string (priv->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)); - - if (! priv->dirty){ - return; - } - - switch (priv->format) { - case CAL_VCAL: - save_to_vcal (backend, str_uri); - break; - case CAL_ICAL: - /*icalendar_calendar_save (backend, str_uri);*/ - /* FIX ME */ - break; - default: - /* FIX ME log */ - break; - } - - printf ("cal-backend: '%s' saved\n", str_uri); -} - - -/* g_hash_table_foreach() callback to destroy an iCalObject */ -static void -free_ical_object (gpointer key, gpointer value, gpointer data) -{ - iCalObject *ico; - - ico = value; - ical_object_destroy (ico); -} - -/* Destroys a backend's data */ -static void -destroy (CalBackend *backend) -{ - CalBackendPrivate *priv; - - priv = backend->priv; - - if (priv->uri) { - gnome_vfs_uri_unref (priv->uri); - priv->uri = NULL; - } - - g_assert (priv->clients == NULL); - - if (priv->object_hash) { - g_hash_table_foreach (priv->object_hash, free_ical_object, NULL); - g_hash_table_destroy (priv->object_hash); - priv->object_hash = NULL; - } - - g_list_free (priv->events); - g_list_free (priv->todos); - g_list_free (priv->journals); - - priv->events = NULL; - priv->todos = NULL; - priv->journals = NULL; - - priv->loaded = FALSE; -} - -/* 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; - - if (priv->loaded) - save (backend); - - destroy (backend); - - g_free (priv); - - if (GTK_OBJECT_CLASS (parent_class)->destroy) - (* GTK_OBJECT_CLASS (parent_class)->destroy) (object); -} - - - -/* iCalObject manipulation functions */ - -/* Looks up an object by its UID in the backend's object hash table */ -static iCalObject * -lookup_object (CalBackend *backend, const char *uid) -{ - CalBackendPrivate *priv; - iCalObject *ico; - - priv = backend->priv; - ico = g_hash_table_lookup (priv->object_hash, uid); - - return ico; -} - -/* 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); - - priv->dirty = TRUE; - - 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 - - /*save (backend);*/ -} - -/* Removes an object from the backend's hash and lists. Does not perform - * notification on the clients. - */ -static void -remove_object (CalBackend *backend, iCalObject *ico) -{ - CalBackendPrivate *priv; - GList **list, *l; - - priv = backend->priv; - - g_assert (ico->uid != NULL); - g_hash_table_remove (priv->object_hash, ico->uid); - - priv->dirty = TRUE; - - switch (ico->type) { - case ICAL_EVENT: - list = &priv->events; - break; - - case ICAL_TODO: - list = &priv->todos; - break; - - case ICAL_JOURNAL: - list = &priv->journals; - break; - - default: - list = NULL; - } - - if (!list){ - return; - } - - l = g_list_find (*list, ico); - g_assert (l != NULL); - - *list = g_list_remove_link (*list, l); - g_list_free_1 (l); - - ical_object_destroy (ico); - /*save (backend);*/ -} - -/* 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); - - /* FIXME: some broken files may have duplicated UIDs. This is - * Bad(tm). Deal with it by creating new UIDs for them and - * spitting some messages to the console. - */ - - if (ical) - add_object (backend, ical); - } -} - - - -/** - * 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; -} - -/* Callback used when a Cal is destroyed */ -static void -cal_destroy_cb (GtkObject *object, gpointer data) -{ - Cal *cal; - Cal *lcal; - CalBackend *backend; - CalBackendPrivate *priv; - GList *l; - - cal = CAL (object); - - backend = CAL_BACKEND (data); - priv = backend->priv; - - /* Find the cal in the list of clients */ - - for (l = priv->clients; l; l = l->next) { - lcal = CAL (l->data); - - if (lcal == cal) - break; - } - - g_assert (l != NULL); - - /* Disconnect */ - - priv->clients = g_list_remove_link (priv->clients, l); - g_list_free_1 (l); - - /* When all clients go away, the backend can go away, too. Commit - * suicide here. - */ - - if (!priv->clients) - gtk_object_unref (GTK_OBJECT (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) -{ - 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)); - - /* We do not keep a reference to the Cal since the calendar user agent - * owns it. - */ - - gtk_signal_connect (GTK_OBJECT (cal), "destroy", - GTK_SIGNAL_FUNC (cal_destroy_cb), - backend); - - priv->clients = g_list_prepend (priv->clients, cal); -} - - -static icalcomponent* -icalendar_parse_file (char* fname) -{ - FILE* fp; - icalcomponent* comp = NULL; - gchar* str; - struct stat st; - int n; - - fp = fopen (fname, "r"); - if (!fp) { - g_warning ("Cannot open open calendar file."); - return NULL; - } - - stat (fname, &st); - - str = g_malloc (st.st_size + 2); - - n = fread ((gchar*) str, 1, st.st_size, fp); - if (n != st.st_size) { - g_warning ("Read error."); - } - str[n] = '\0'; - - fclose (fp); - - comp = icalparser_parse_string (str); - g_free (str); - - return comp; -} - - -static void -icalendar_calendar_load (CalBackend * cal, char* fname) -{ - icalcomponent *comp; - icalcomponent *subcomp; - iCalObject *ical; - - comp = icalendar_parse_file (fname); - subcomp = icalcomponent_get_first_component (comp, - ICAL_ANY_COMPONENT); - while (subcomp) { - ical = ical_object_create_from_icalcomponent (subcomp); - if (ical->type != ICAL_EVENT && - ical->type != ICAL_TODO && - ical->type != ICAL_JOURNAL) { - g_warning ("Skipping unsupported iCalendar component."); - } else - add_object (cal, ical); - subcomp = icalcomponent_get_next_component (comp, - ICAL_ANY_COMPONENT); - } -} - - -/* -ics is to be used to designate a file containing (an arbitrary set of) -calendaring and scheduling information. - -ifb is to be used to designate a file containing free or busy time -information. - -anything else is assumed to be a vcal file. -*/ - -static CalendarFormat -cal_get_type_from_filename (char *str_uri) -{ - int len; - - if (str_uri == NULL){ - return CAL_VCAL; - } - - len = strlen (str_uri); - if (len < 5){ - return CAL_VCAL; - } - - if (str_uri[ len-4 ] == '.' && - str_uri[ len-3 ] == 'i' && - str_uri[ len-2 ] == 'c' && - str_uri[ len-1 ] == 's'){ - return CAL_ICAL; - } - - if (str_uri[ len-4 ] == '.' && - str_uri[ len-3 ] == 'i' && - str_uri[ len-2 ] == 'f' && - str_uri[ len-1 ] == 'b'){ - return CAL_ICAL; - } - - return CAL_VCAL; -} - - -/** - * 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); - - priv = backend->priv; - g_return_val_if_fail (!priv->loaded, CAL_BACKEND_LOAD_ERROR); - - g_return_val_if_fail (uri != NULL, 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)); - - - /* look at the extension on the filename and decide - if this is a ical or vcal file */ - - priv->format = cal_get_type_from_filename (str_uri); - - /* load */ - - switch (priv->format) { - case CAL_VCAL: - vobject = Parse_MIME_FromFileName (str_uri); - - if (!vobject){ - return CAL_BACKEND_LOAD_ERROR; - } - - load_from_vobject (backend, vobject); - cleanVObject (vobject); - cleanStrTbl (); - break; - case CAL_ICAL: - icalendar_calendar_load (backend, str_uri); - break; - default: - return CAL_BACKEND_LOAD_ERROR; - } - - g_free (str_uri); - - gnome_vfs_uri_ref (uri); - - priv->uri = uri; - priv->loaded = TRUE; - - return CAL_BACKEND_LOAD_SUCCESS; -} - -/** - * 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) -{ - 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 (uri != NULL); - - /* Create the new calendar information */ - - g_assert (priv->object_hash == NULL); - priv->object_hash = g_hash_table_new (g_str_hash, g_str_equal); - - priv->dirty = TRUE; - - /* Done */ - - gnome_vfs_uri_ref (uri); - - priv->uri = uri; - priv->loaded = TRUE; - - save (backend); -} - -/** - * 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; - 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 = lookup_object (backend, uid); - - if (!ico){ - return NULL; - } - - buf = ical_object_to_string (ico); - - return buf; -} - -struct get_uids_closure { - CalObjType type; - GList *uid_list; -}; - -/* Builds a list of UIDs for objects that match the sought type. Called from - * g_hash_table_foreach(). - */ -static void -build_uids_list (gpointer key, gpointer value, gpointer data) -{ - iCalObject *ico; - struct get_uids_closure *c; - gboolean store; - - ico = value; - c = data; - - store = FALSE; - - /* - if (c->type & CALOBJ_TYPE_ANY) - store = TRUE; - else */ - if (ico->type == ICAL_EVENT) - store = (c->type & CALOBJ_TYPE_EVENT) ? TRUE : FALSE; - else if (ico->type == ICAL_TODO) - store = (c->type & CALOBJ_TYPE_TODO) ? TRUE : FALSE; - else if (ico->type == ICAL_JOURNAL) - store = (c->type & CALOBJ_TYPE_JOURNAL) ? TRUE : FALSE; - else - store = (c->type & CALOBJ_TYPE_OTHER) ? TRUE : FALSE; - - if (store) - c->uid_list = g_list_prepend (c->uid_list, g_strdup (ico->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) -{ - CalBackendPrivate *priv; - struct get_uids_closure c; - - 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); - - /* We go through the hash table instead of the lists of particular - * object types so that we can pick up CALOBJ_TYPE_OTHER objects. - */ - - c.type = type; - c.uid_list = NULL; - g_hash_table_foreach (priv->object_hash, build_uids_list, &c); - - return c.uid_list; -} - -struct build_event_list_closure { - CalBackend *backend; - GList *event_list; -}; - -/* Builds a sorted list of event object instances. Used as a callback from - * ical_object_generate_events(). - */ -static int -build_event_list (iCalObject *ico, time_t start, time_t end, void *data) -{ - CalObjInstance *icoi; - struct build_event_list_closure *c; - - c = data; - - icoi = g_new (CalObjInstance, 1); - - g_assert (ico->uid != NULL); - icoi->uid = g_strdup (ico->uid); - icoi->start = start; - icoi->end = end; - - c->event_list = g_list_prepend (c->event_list, icoi); - - return TRUE; -} - -/* Compares two CalObjInstance structures by their start times. Called from - * g_list_sort(). - */ -static gint -compare_instance_func (gconstpointer a, gconstpointer b) -{ - const CalObjInstance *ca, *cb; - time_t diff; - - ca = a; - cb = b; - - diff = ca->start - cb->start; - return (diff < 0) ? -1 : (diff > 0) ? 1 : 0; -} - -/** - * 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) -{ - CalBackendPrivate *priv; - struct build_event_list_closure c; - GList *l; - - 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 (start != -1 && end != -1, NULL); - g_return_val_if_fail (start <= end, NULL); - - c.backend = backend; - c.event_list = NULL; - - for (l = priv->events; l; l = l->next) { - iCalObject *ico; - - ico = l->data; - ical_object_generate_events (ico, start, end, - build_event_list, &c); - } - - c.event_list = g_list_sort (c.event_list, compare_instance_func); - - return c.event_list; -} - -/* Notifies a backend's clients that an object was updated */ -static void -notify_update (CalBackend *backend, const char *uid) -{ - CalBackendPrivate *priv; - GList *l; - - priv = backend->priv; - - for (l = priv->clients; l; l = l->next) { - Cal *cal; - - cal = CAL (l->data); - cal_notify_update (cal, uid); - } -} - -/* Notifies a backend's clients that an object was removed */ -static void -notify_remove (CalBackend *backend, const char *uid) -{ - CalBackendPrivate *priv; - GList *l; - - priv = backend->priv; - - for (l = priv->clients; l; l = l->next) { - Cal *cal; - - cal = CAL (l->data); - cal_notify_remove (cal, uid); - } -} - -/** - * 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) -{ - CalBackendPrivate *priv; - iCalObject *ico, *new_ico; - CalObjFindStatus status; - - g_return_val_if_fail (backend != NULL, FALSE); - g_return_val_if_fail (IS_CAL_BACKEND (backend), FALSE); - - priv = backend->priv; - g_return_val_if_fail (priv->loaded, FALSE); - - g_return_val_if_fail (uid != NULL, FALSE); - g_return_val_if_fail (calobj != NULL, FALSE); - - /* Pull the object from the string */ - - status = ical_object_find_in_string (uid, calobj, &new_ico); - - if (status != CAL_OBJ_FIND_SUCCESS){ - return FALSE; - } - - /* Update the object */ - - ico = lookup_object (backend, uid); - - if (ico) - remove_object (backend, ico); - - add_object (backend, new_ico); - save (backend); - - /* FIXME: do the notification asynchronously */ - - notify_update (backend, new_ico->uid); - - return TRUE; -} - -/** - * 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) -{ - CalBackendPrivate *priv; - iCalObject *ico; - - g_return_val_if_fail (backend != NULL, FALSE); - g_return_val_if_fail (IS_CAL_BACKEND (backend), FALSE); - - priv = backend->priv; - g_return_val_if_fail (priv->loaded, FALSE); - - g_return_val_if_fail (uid != NULL, FALSE); - - ico = lookup_object (backend, uid); - if (!ico){ - return FALSE; - } - - remove_object (backend, ico); - - priv->dirty = TRUE; - save (backend); - - /* FIXME: do the notification asynchronously */ - notify_remove (backend, uid); - - return TRUE; -} |