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Diffstat (limited to 'calendar/pcs/cal-backend-file.c')
| -rw-r--r-- | calendar/pcs/cal-backend-file.c | 1932 |
1 files changed, 0 insertions, 1932 deletions
diff --git a/calendar/pcs/cal-backend-file.c b/calendar/pcs/cal-backend-file.c deleted file mode 100644 index 424912e87b..0000000000 --- a/calendar/pcs/cal-backend-file.c +++ /dev/null @@ -1,1932 +0,0 @@ -/* Evolution calendar - iCalendar file backend - * - * Copyright (C) 2000 Ximian, Inc. - * Copyright (C) 2000 Ximian, Inc. - * - * Authors: Federico Mena-Quintero <federico@ximian.com> - * Rodrigo Moya <rodrigo@ximian.com> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of version 2 of the GNU General Public - * License as published by the Free Software Foundation. - * - * 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 <bonobo/bonobo-exception.h> -#include <bonobo/bonobo-moniker-util.h> -#include <libgnomevfs/gnome-vfs.h> -#include "e-util/e-dbhash.h" -#include "cal-util/cal-recur.h" -#include "cal-util/cal-util.h" -#include "cal-backend-file.h" -#include "cal-backend-util.h" - - - -/* A category that exists in some of the objects of the calendar */ -typedef struct { - /* Category name, also used as the key in the categories hash table */ - char *name; - - /* Number of objects that have this category */ - int refcount; -} Category; - -/* Private part of the CalBackendFile structure */ -struct _CalBackendFilePrivate { - /* URI where the calendar data is stored */ - char *uri; - - /* List of Cal objects with their listeners */ - GList *clients; - - /* Toplevel VCALENDAR component */ - icalcomponent *icalcomp; - - /* All the CalComponent objects in the calendar, hashed by UID. The - * hash key *is* the uid returned by cal_component_get_uid(); it is not - * copied, so don't free it when you remove an object from the hash - * table. - */ - GHashTable *comp_uid_hash; - - /* All event, to-do, and journal components in the calendar; they are - * here just for easy access (i.e. so that you don't have to iterate - * over the comp_uid_hash). If you need *all* the components in the - * calendar, iterate over the hash instead. - */ - GList *events; - GList *todos; - GList *journals; - - /* Hash table of live categories, and a temporary hash of removed categories */ - GHashTable *categories; - GHashTable *removed_categories; - - /* Config database handle for free/busy organizer information */ - Bonobo_ConfigDatabase db; - - /* Idle handler for saving the calendar when it is dirty */ - guint idle_id; - - /* The calendar's default timezone, used for resolving DATE and - floating DATE-TIME values. */ - icaltimezone *default_zone; -}; - - - -static void cal_backend_file_class_init (CalBackendFileClass *class); -static void cal_backend_file_init (CalBackendFile *cbfile); -static void cal_backend_file_destroy (GtkObject *object); - -static const char *cal_backend_file_get_uri (CalBackend *backend); -static CalBackendOpenStatus cal_backend_file_open (CalBackend *backend, - const char *uristr, - gboolean only_if_exists); -static gboolean cal_backend_file_is_loaded (CalBackend *backend); - -static CalMode cal_backend_file_get_mode (CalBackend *backend); -static void cal_backend_file_set_mode (CalBackend *backend, CalMode mode); - -static int cal_backend_file_get_n_objects (CalBackend *backend, CalObjType type); -static char *cal_backend_file_get_object (CalBackend *backend, const char *uid); -static CalComponent *cal_backend_file_get_object_component (CalBackend *backend, const char *uid); -static char *cal_backend_file_get_timezone_object (CalBackend *backend, const char *tzid); -static GList *cal_backend_file_get_uids (CalBackend *backend, CalObjType type); -static GList *cal_backend_file_get_objects_in_range (CalBackend *backend, CalObjType type, - time_t start, time_t end); -static GList *cal_backend_file_get_free_busy (CalBackend *backend, GList *users, time_t start, time_t end); -static GNOME_Evolution_Calendar_CalObjChangeSeq *cal_backend_file_get_changes ( - CalBackend *backend, CalObjType type, const char *change_id); - -static GNOME_Evolution_Calendar_CalComponentAlarmsSeq *cal_backend_file_get_alarms_in_range ( - CalBackend *backend, time_t start, time_t end); - -static GNOME_Evolution_Calendar_CalComponentAlarms *cal_backend_file_get_alarms_for_object ( - CalBackend *backend, const char *uid, - time_t start, time_t end, gboolean *object_found); - -static gboolean cal_backend_file_update_objects (CalBackend *backend, const char *calobj); -static gboolean cal_backend_file_remove_object (CalBackend *backend, const char *uid); - -static icaltimezone* cal_backend_file_get_timezone (CalBackend *backend, const char *tzid); -static icaltimezone* cal_backend_file_get_default_timezone (CalBackend *backend); -static gboolean cal_backend_file_set_default_timezone (CalBackend *backend, - const char *tzid); - -static void notify_categories_changed (CalBackendFile *cbfile); - -static CalBackendClass *parent_class; - - - -/** - * cal_backend_file_get_type: - * @void: - * - * Registers the #CalBackendFile class if necessary, and returns the type ID - * associated to it. - * - * Return value: The type ID of the #CalBackendFile class. - **/ -GtkType -cal_backend_file_get_type (void) -{ - static GtkType cal_backend_file_type = 0; - - if (!cal_backend_file_type) { - static const GtkTypeInfo cal_backend_file_info = { - "CalBackendFile", - sizeof (CalBackendFile), - sizeof (CalBackendFileClass), - (GtkClassInitFunc) cal_backend_file_class_init, - (GtkObjectInitFunc) cal_backend_file_init, - NULL, /* reserved_1 */ - NULL, /* reserved_2 */ - (GtkClassInitFunc) NULL - }; - - cal_backend_file_type = gtk_type_unique (CAL_BACKEND_TYPE, &cal_backend_file_info); - } - - return cal_backend_file_type; -} - -/* Class initialization function for the file backend */ -static void -cal_backend_file_class_init (CalBackendFileClass *class) -{ - GtkObjectClass *object_class; - CalBackendClass *backend_class; - - object_class = (GtkObjectClass *) class; - backend_class = (CalBackendClass *) class; - - parent_class = gtk_type_class (CAL_BACKEND_TYPE); - - object_class->destroy = cal_backend_file_destroy; - - backend_class->get_uri = cal_backend_file_get_uri; - backend_class->open = cal_backend_file_open; - backend_class->is_loaded = cal_backend_file_is_loaded; - backend_class->get_mode = cal_backend_file_get_mode; - backend_class->set_mode = cal_backend_file_set_mode; - backend_class->get_n_objects = cal_backend_file_get_n_objects; - backend_class->get_object = cal_backend_file_get_object; - backend_class->get_object_component = cal_backend_file_get_object_component; - backend_class->get_timezone_object = cal_backend_file_get_timezone_object; - backend_class->get_uids = cal_backend_file_get_uids; - backend_class->get_objects_in_range = cal_backend_file_get_objects_in_range; - backend_class->get_free_busy = cal_backend_file_get_free_busy; - backend_class->get_changes = cal_backend_file_get_changes; - backend_class->get_alarms_in_range = cal_backend_file_get_alarms_in_range; - backend_class->get_alarms_for_object = cal_backend_file_get_alarms_for_object; - backend_class->update_objects = cal_backend_file_update_objects; - backend_class->remove_object = cal_backend_file_remove_object; - - backend_class->get_timezone = cal_backend_file_get_timezone; - backend_class->get_default_timezone = cal_backend_file_get_default_timezone; - backend_class->set_default_timezone = cal_backend_file_set_default_timezone; -} - -static Bonobo_ConfigDatabase -load_db (void) -{ - Bonobo_ConfigDatabase db = CORBA_OBJECT_NIL; - CORBA_Environment ev; - - CORBA_exception_init (&ev); - - db = bonobo_get_object ("wombat:", "Bonobo/ConfigDatabase", &ev); - - if (BONOBO_EX (&ev)) - db = CORBA_OBJECT_NIL; - - CORBA_exception_free (&ev); - - return db; -} - -static void -cal_added_cb (CalBackend *backend, gpointer user_data) -{ - notify_categories_changed (CAL_BACKEND_FILE (backend)); -} - -/* Object initialization function for the file backend */ -static void -cal_backend_file_init (CalBackendFile *cbfile) -{ - CalBackendFilePrivate *priv; - - priv = g_new0 (CalBackendFilePrivate, 1); - cbfile->priv = priv; - - priv->uri = NULL; - priv->icalcomp = NULL; - priv->comp_uid_hash = NULL; - priv->events = NULL; - priv->todos = NULL; - priv->journals = NULL; - - priv->categories = g_hash_table_new (g_str_hash, g_str_equal); - priv->removed_categories = g_hash_table_new (g_str_hash, g_str_equal); - - /* The timezone defaults to UTC. */ - priv->default_zone = icaltimezone_get_utc_timezone (); - - priv->db = load_db (); - - gtk_signal_connect (GTK_OBJECT (cbfile), "cal_added", - GTK_SIGNAL_FUNC (cal_added_cb), NULL); -} - -/* g_hash_table_foreach() callback to destroy a CalComponent */ -static void -free_cal_component (gpointer key, gpointer value, gpointer data) -{ - CalComponent *comp; - - comp = CAL_COMPONENT (value); - gtk_object_unref (GTK_OBJECT (comp)); -} - -/* Saves the calendar data */ -static void -save (CalBackendFile *cbfile) -{ - CalBackendFilePrivate *priv; - GnomeVFSURI *uri; - GnomeVFSHandle *handle = NULL; - GnomeVFSResult result; - GnomeVFSFileSize out; - gchar *tmp; - char *buf; - - priv = cbfile->priv; - g_assert (priv->uri != NULL); - g_assert (priv->icalcomp != NULL); - - uri = gnome_vfs_uri_new (priv->uri); - - /* Make a backup copy of the file if it exists */ - tmp = gnome_vfs_uri_to_string (uri, GNOME_VFS_URI_HIDE_NONE); - if (tmp) { - GnomeVFSURI *backup_uri; - gchar *backup_uristr; - - backup_uristr = g_strconcat (tmp, "~", NULL); - backup_uri = gnome_vfs_uri_new (backup_uristr); - - result = gnome_vfs_move_uri (uri, backup_uri, TRUE); - gnome_vfs_uri_unref (backup_uri); - - g_free (tmp); - g_free (backup_uristr); - } - - /* Now write the new file out */ - result = gnome_vfs_create_uri (&handle, uri, - GNOME_VFS_OPEN_WRITE, - FALSE, 0666); - - if (result != GNOME_VFS_OK) - goto error; - - buf = icalcomponent_as_ical_string (priv->icalcomp); - result = gnome_vfs_write (handle, buf, strlen (buf) * sizeof (char), &out); - - if (result != GNOME_VFS_OK) - goto error; - - gnome_vfs_close (handle); - gnome_vfs_uri_unref (uri); - - return; - - error: - g_warning ("Error writing calendar file."); - return; -} - -/* Used from g_hash_table_foreach(), frees a Category structure */ -static void -free_category_cb (gpointer key, gpointer value, gpointer data) -{ - Category *c; - - c = value; - g_free (c->name); - g_free (c); -} - -/* Destroy handler for the file backend */ -static void -cal_backend_file_destroy (GtkObject *object) -{ - CalBackendFile *cbfile; - CalBackendFilePrivate *priv; - GList *clients; - - g_return_if_fail (object != NULL); - g_return_if_fail (IS_CAL_BACKEND_FILE (object)); - - cbfile = CAL_BACKEND_FILE (object); - priv = cbfile->priv; - - clients = CAL_BACKEND (cbfile)->clients; - g_assert (clients == NULL); - - /* Save if necessary */ - - if (priv->idle_id != 0) { - save (cbfile); - g_source_remove (priv->idle_id); - priv->idle_id = 0; - } - - /* Clean up */ - - if (priv->uri) { - g_free (priv->uri); - priv->uri = NULL; - } - - if (priv->comp_uid_hash) { - g_hash_table_foreach (priv->comp_uid_hash, - free_cal_component, NULL); - g_hash_table_destroy (priv->comp_uid_hash); - priv->comp_uid_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; - - g_hash_table_foreach (priv->categories, free_category_cb, NULL); - g_hash_table_destroy (priv->categories); - priv->categories = NULL; - - g_hash_table_foreach (priv->removed_categories, free_category_cb, NULL); - g_hash_table_destroy (priv->removed_categories); - priv->removed_categories = NULL; - - if (priv->icalcomp) { - icalcomponent_free (priv->icalcomp); - priv->icalcomp = NULL; - } - - bonobo_object_release_unref (priv->db, NULL); - priv->db = CORBA_OBJECT_NIL; - - g_free (priv); - cbfile->priv = NULL; - - if (GTK_OBJECT_CLASS (parent_class)->destroy) - (* GTK_OBJECT_CLASS (parent_class)->destroy) (object); -} - - - -/* Looks up a component by its UID on the backend's component hash table */ -static CalComponent * -lookup_component (CalBackendFile *cbfile, const char *uid) -{ - CalBackendFilePrivate *priv; - CalComponent *comp; - - priv = cbfile->priv; - - comp = g_hash_table_lookup (priv->comp_uid_hash, uid); - - return comp; -} - - - -/* Calendar backend methods */ - -/* Get_uri handler for the file backend */ -static const char * -cal_backend_file_get_uri (CalBackend *backend) -{ - CalBackendFile *cbfile; - CalBackendFilePrivate *priv; - - cbfile = CAL_BACKEND_FILE (backend); - priv = cbfile->priv; - - g_return_val_if_fail (priv->icalcomp != NULL, NULL); - g_assert (priv->uri != NULL); - - return (const char *) priv->uri; -} - -/* Used from g_hash_table_foreach(), adds a category name to the sequence */ -static void -add_category_cb (gpointer key, gpointer value, gpointer data) -{ - Category *c; - GNOME_Evolution_Calendar_StringSeq *seq; - - c = value; - seq = data; - - seq->_buffer[seq->_length] = CORBA_string_dup (c->name); - seq->_length++; -} - -/* Notifies the clients with the current list of categories */ -static void -notify_categories_changed (CalBackendFile *cbfile) -{ - CalBackendFilePrivate *priv; - GNOME_Evolution_Calendar_StringSeq *seq; - GList *l; - - priv = cbfile->priv; - - /* Build the sequence of category names */ - - seq = GNOME_Evolution_Calendar_StringSeq__alloc (); - seq->_length = 0; - seq->_maximum = g_hash_table_size (priv->categories); - seq->_buffer = CORBA_sequence_CORBA_string_allocbuf (seq->_maximum); - CORBA_sequence_set_release (seq, TRUE); - - g_hash_table_foreach (priv->categories, add_category_cb, seq); - g_assert (seq->_length == seq->_maximum); - - /* Notify the clients */ - - for (l = CAL_BACKEND (cbfile)->clients; l; l = l->next) { - Cal *cal; - - cal = CAL (l->data); - cal_notify_categories_changed (cal, seq); - } - - CORBA_free (seq); -} - -/* Idle handler; we save the calendar since it is dirty */ -static gboolean -save_idle (gpointer data) -{ - CalBackendFile *cbfile; - CalBackendFilePrivate *priv; - - cbfile = CAL_BACKEND_FILE (data); - priv = cbfile->priv; - - g_assert (priv->icalcomp != NULL); - - save (cbfile); - - priv->idle_id = 0; - return FALSE; -} - -/* Marks the file backend as dirty and queues a save operation */ -static void -mark_dirty (CalBackendFile *cbfile) -{ - CalBackendFilePrivate *priv; - - priv = cbfile->priv; - - if (priv->idle_id != 0) - return; - - priv->idle_id = g_idle_add (save_idle, cbfile); -} - -/* Checks if the specified component has a duplicated UID and if so changes it */ -static void -check_dup_uid (CalBackendFile *cbfile, CalComponent *comp) -{ - CalBackendFilePrivate *priv; - CalComponent *old_comp; - const char *uid; - char *new_uid; - - priv = cbfile->priv; - - cal_component_get_uid (comp, &uid); - - old_comp = g_hash_table_lookup (priv->comp_uid_hash, uid); - if (!old_comp) - return; /* Everything is fine */ - - g_message ("check_dup_uid(): Got object with duplicated UID `%s', changing it...", uid); - - new_uid = cal_component_gen_uid (); - cal_component_set_uid (comp, new_uid); - g_free (new_uid); - - /* FIXME: I think we need to reset the SEQUENCE property and reset the - * CREATED/DTSTAMP/LAST-MODIFIED. - */ - - mark_dirty (cbfile); -} - -/* Updates the hash table of categories by adding or removing those in the - * component. - */ -static void -update_categories_from_comp (CalBackendFile *cbfile, CalComponent *comp, gboolean add) -{ - CalBackendFilePrivate *priv; - GSList *categories, *l; - - priv = cbfile->priv; - - cal_component_get_categories_list (comp, &categories); - - for (l = categories; l; l = l->next) { - const char *name; - Category *c; - - name = l->data; - c = g_hash_table_lookup (priv->categories, name); - - if (add) { - /* Add the category to the set */ - if (c) - c->refcount++; - else { - /* See if it was in the removed categories */ - - c = g_hash_table_lookup (priv->removed_categories, name); - if (c) { - /* Move it to the set of live categories */ - g_assert (c->refcount == 0); - g_hash_table_remove (priv->removed_categories, c->name); - - c->refcount = 1; - g_hash_table_insert (priv->categories, c->name, c); - } else { - /* Create a new category */ - c = g_new (Category, 1); - c->name = g_strdup (name); - c->refcount = 1; - - g_hash_table_insert (priv->categories, c->name, c); - } - } - } else { - /* Remove the category from the set --- it *must* have existed */ - - g_assert (c != NULL); - g_assert (c->refcount > 0); - - c->refcount--; - - if (c->refcount == 0) { - g_hash_table_remove (priv->categories, c->name); - g_hash_table_insert (priv->removed_categories, c->name, c); - } - } - } - - cal_component_free_categories_list (categories); -} - -/* Tries to add an icalcomponent to the file backend. We only store the objects - * of the types we support; all others just remain in the toplevel component so - * that we don't lose them. - */ -static void -add_component (CalBackendFile *cbfile, CalComponent *comp, gboolean add_to_toplevel) -{ - CalBackendFilePrivate *priv; - GList **list; - const char *uid; - - priv = cbfile->priv; - - switch (cal_component_get_vtype (comp)) { - case CAL_COMPONENT_EVENT: - list = &priv->events; - break; - - case CAL_COMPONENT_TODO: - list = &priv->todos; - break; - - case CAL_COMPONENT_JOURNAL: - list = &priv->journals; - break; - - default: - g_assert_not_reached (); - return; - } - - /* Ensure that the UID is unique; some broken implementations spit - * components with duplicated UIDs. - */ - check_dup_uid (cbfile, comp); - cal_component_get_uid (comp, &uid); - g_hash_table_insert (priv->comp_uid_hash, (char *)uid, comp); - - *list = g_list_prepend (*list, comp); - - /* Put the object in the toplevel component if required */ - - if (add_to_toplevel) { - icalcomponent *icalcomp; - - icalcomp = cal_component_get_icalcomponent (comp); - g_assert (icalcomp != NULL); - - icalcomponent_add_component (priv->icalcomp, icalcomp); - } - - /* Update the set of categories */ - - update_categories_from_comp (cbfile, comp, TRUE); -} - -/* Removes a component from the backend's hash and lists. Does not perform - * notification on the clients. Also removes the component from the toplevel - * icalcomponent. - */ -static void -remove_component (CalBackendFile *cbfile, CalComponent *comp) -{ - CalBackendFilePrivate *priv; - icalcomponent *icalcomp; - const char *uid; - GList **list, *l; - - priv = cbfile->priv; - - /* Remove the icalcomp from the toplevel */ - - icalcomp = cal_component_get_icalcomponent (comp); - g_assert (icalcomp != NULL); - - icalcomponent_remove_component (priv->icalcomp, icalcomp); - - /* Remove it from our mapping */ - - cal_component_get_uid (comp, &uid); - g_hash_table_remove (priv->comp_uid_hash, uid); - - switch (cal_component_get_vtype (comp)) { - case CAL_COMPONENT_EVENT: - list = &priv->events; - break; - - case CAL_COMPONENT_TODO: - list = &priv->todos; - break; - - case CAL_COMPONENT_JOURNAL: - list = &priv->journals; - break; - - default: - /* Make the compiler shut up. */ - list = NULL; - g_assert_not_reached (); - } - - l = g_list_find (*list, comp); - g_assert (l != NULL); - - *list = g_list_remove_link (*list, l); - g_list_free_1 (l); - - /* Update the set of categories */ - - update_categories_from_comp (cbfile, comp, FALSE); - - gtk_object_unref (GTK_OBJECT (comp)); -} - -/* Scans the toplevel VCALENDAR component and stores the objects it finds */ -static void -scan_vcalendar (CalBackendFile *cbfile) -{ - CalBackendFilePrivate *priv; - icalcompiter iter; - - priv = cbfile->priv; - g_assert (priv->icalcomp != NULL); - g_assert (priv->comp_uid_hash != NULL); - - for (iter = icalcomponent_begin_component (priv->icalcomp, ICAL_ANY_COMPONENT); - icalcompiter_deref (&iter) != NULL; - icalcompiter_next (&iter)) { - icalcomponent *icalcomp; - icalcomponent_kind kind; - CalComponent *comp; - - icalcomp = icalcompiter_deref (&iter); - - kind = icalcomponent_isa (icalcomp); - - if (!(kind == ICAL_VEVENT_COMPONENT - || kind == ICAL_VTODO_COMPONENT - || kind == ICAL_VJOURNAL_COMPONENT)) - continue; - - comp = cal_component_new (); - - if (!cal_component_set_icalcomponent (comp, icalcomp)) - continue; - - add_component (cbfile, comp, FALSE); - } -} - -/* Callback used from icalparser_parse() */ -static char * -get_line_fn (char *s, size_t size, void *data) -{ - FILE *file; - - file = data; - return fgets (s, size, file); -} - -/* Parses an open iCalendar file and returns a toplevel component with the contents */ -static icalcomponent * -parse_file (FILE *file) -{ - icalparser *parser; - icalcomponent *icalcomp; - - parser = icalparser_new (); - icalparser_set_gen_data (parser, file); - - icalcomp = icalparser_parse (parser, get_line_fn); - icalparser_free (parser); - - return icalcomp; -} - -/* Parses an open iCalendar file and loads it into the backend */ -static CalBackendOpenStatus -open_cal (CalBackendFile *cbfile, const char *uristr, FILE *file) -{ - CalBackendFilePrivate *priv; - icalcomponent *icalcomp; - - priv = cbfile->priv; - - icalcomp = parse_file (file); - - if (fclose (file) != 0) { - if (icalcomp) - icalcomponent_free (icalcomp); - - return CAL_BACKEND_OPEN_ERROR; - } - - if (!icalcomp) - return CAL_BACKEND_OPEN_ERROR; - - /* FIXME: should we try to demangle XROOT components and - * individual components as well? - */ - - if (icalcomponent_isa (icalcomp) != ICAL_VCALENDAR_COMPONENT) { - icalcomponent_free (icalcomp); - return CAL_BACKEND_OPEN_ERROR; - } - - priv->icalcomp = icalcomp; - - priv->comp_uid_hash = g_hash_table_new (g_str_hash, g_str_equal); - scan_vcalendar (cbfile); - - priv->uri = g_strdup (uristr); - - return CAL_BACKEND_OPEN_SUCCESS; -} - -static CalBackendOpenStatus -create_cal (CalBackendFile *cbfile, const char *uristr) -{ - CalBackendFilePrivate *priv; - - priv = cbfile->priv; - - /* Create the new calendar information */ - priv->icalcomp = cal_util_new_top_level (); - - /* Create our internal data */ - priv->comp_uid_hash = g_hash_table_new (g_str_hash, g_str_equal); - - priv->uri = g_strdup (uristr); - - mark_dirty (cbfile); - - return CAL_BACKEND_OPEN_SUCCESS; -} - -/* Open handler for the file backend */ -static CalBackendOpenStatus -cal_backend_file_open (CalBackend *backend, const char *uristr, gboolean only_if_exists) -{ - CalBackendFile *cbfile; - CalBackendFilePrivate *priv; - FILE *file; - char *str_uri; - GnomeVFSURI *uri; - CalBackendOpenStatus status; - - cbfile = CAL_BACKEND_FILE (backend); - priv = cbfile->priv; - - g_return_val_if_fail (priv->icalcomp == NULL, CAL_BACKEND_OPEN_ERROR); - g_return_val_if_fail (uristr != NULL, CAL_BACKEND_OPEN_ERROR); - - g_assert (priv->uri == NULL); - g_assert (priv->comp_uid_hash == NULL); - - uri = gnome_vfs_uri_new (uristr); - if (!uri) - return CAL_BACKEND_OPEN_ERROR; - - if (!gnome_vfs_uri_is_local (uri)) { - gnome_vfs_uri_unref (uri); - return CAL_BACKEND_OPEN_ERROR; - } - - 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)); - - /* Load! */ - file = fopen (str_uri, "r"); - - if (file) - status = open_cal (cbfile, str_uri, file); - else { - if (only_if_exists) - status = CAL_BACKEND_OPEN_NOT_FOUND; - else - status = create_cal (cbfile, str_uri); - } - - g_free (str_uri); - gnome_vfs_uri_unref (uri); - - return status; -} - -/* is_loaded handler for the file backend */ -static gboolean -cal_backend_file_is_loaded (CalBackend *backend) -{ - CalBackendFile *cbfile; - CalBackendFilePrivate *priv; - - cbfile = CAL_BACKEND_FILE (backend); - priv = cbfile->priv; - - return (priv->icalcomp != NULL); -} - -/* is_remote handler for the file backend */ -static CalMode -cal_backend_file_get_mode (CalBackend *backend) -{ - CalBackendFile *cbfile; - CalBackendFilePrivate *priv; - - cbfile = CAL_BACKEND_FILE (backend); - priv = cbfile->priv; - - return CAL_MODE_LOCAL; -} - -static void -notify_mode (CalBackendFile *cbfile, - GNOME_Evolution_Calendar_Listener_SetModeStatus status, - GNOME_Evolution_Calendar_CalMode mode) -{ - CalBackendFilePrivate *priv; - GList *l; - - priv = cbfile->priv; - - for (l = CAL_BACKEND (cbfile)->clients; l; l = l->next) { - Cal *cal; - - cal = CAL (l->data); - cal_notify_mode (cal, status, mode); - } -} - -/* Set_mode handler for the file backend */ -static void -cal_backend_file_set_mode (CalBackend *backend, CalMode mode) -{ - notify_mode (CAL_BACKEND_FILE (backend), - GNOME_Evolution_Calendar_Listener_MODE_NOT_SUPPORTED, - GNOME_Evolution_Calendar_MODE_LOCAL); - -} - -/* Get_n_objects handler for the file backend */ -static int -cal_backend_file_get_n_objects (CalBackend *backend, CalObjType type) -{ - CalBackendFile *cbfile; - CalBackendFilePrivate *priv; - int n; - - cbfile = CAL_BACKEND_FILE (backend); - priv = cbfile->priv; - - g_return_val_if_fail (priv->icalcomp != NULL, -1); - - n = 0; - - if (type & CALOBJ_TYPE_EVENT) - n += g_list_length (priv->events); - - if (type & CALOBJ_TYPE_TODO) - n += g_list_length (priv->todos); - - if (type & CALOBJ_TYPE_JOURNAL) - n += g_list_length (priv->journals); - - return n; -} - -/* Get_object handler for the file backend */ -static char * -cal_backend_file_get_object (CalBackend *backend, const char *uid) -{ - CalBackendFile *cbfile; - CalBackendFilePrivate *priv; - CalComponent *comp; - - cbfile = CAL_BACKEND_FILE (backend); - priv = cbfile->priv; - - g_return_val_if_fail (uid != NULL, NULL); - - g_return_val_if_fail (priv->icalcomp != NULL, NULL); - g_assert (priv->comp_uid_hash != NULL); - - comp = lookup_component (cbfile, uid); - - if (!comp) - return NULL; - - return cal_component_get_as_string (comp); -} - -/* Get_object handler for the file backend */ -static CalComponent * -cal_backend_file_get_object_component (CalBackend *backend, const char *uid) -{ - CalBackendFile *cbfile; - CalBackendFilePrivate *priv; - - cbfile = CAL_BACKEND_FILE (backend); - priv = cbfile->priv; - - g_return_val_if_fail (uid != NULL, NULL); - - g_return_val_if_fail (priv->icalcomp != NULL, NULL); - g_assert (priv->comp_uid_hash != NULL); - - return lookup_component (cbfile, uid); -} - -/* Get_object handler for the file backend */ -static char * -cal_backend_file_get_timezone_object (CalBackend *backend, const char *tzid) -{ - CalBackendFile *cbfile; - CalBackendFilePrivate *priv; - icaltimezone *zone; - icalcomponent *icalcomp; - char *ical_string; - - cbfile = CAL_BACKEND_FILE (backend); - priv = cbfile->priv; - - g_return_val_if_fail (tzid != NULL, NULL); - - g_return_val_if_fail (priv->icalcomp != NULL, NULL); - g_assert (priv->comp_uid_hash != NULL); - - zone = icalcomponent_get_timezone (priv->icalcomp, tzid); - if (!zone) - return NULL; - - icalcomp = icaltimezone_get_component (zone); - if (!icalcomp) - return NULL; - - ical_string = icalcomponent_as_ical_string (icalcomp); - /* We dup the string; libical owns that memory. */ - if (ical_string) - return g_strdup (ical_string); - else - return NULL; -} - -/* Builds a list of UIDs from a list of CalComponent objects */ -static void -build_uids_list (GList **list, GList *components) -{ - GList *l; - - for (l = components; l; l = l->next) { - CalComponent *comp; - const char *uid; - - comp = CAL_COMPONENT (l->data); - cal_component_get_uid (comp, &uid); - *list = g_list_prepend (*list, g_strdup (uid)); - } -} - -/* Get_uids handler for the file backend */ -static GList * -cal_backend_file_get_uids (CalBackend *backend, CalObjType type) -{ - CalBackendFile *cbfile; - CalBackendFilePrivate *priv; - GList *list; - - cbfile = CAL_BACKEND_FILE (backend); - priv = cbfile->priv; - - g_return_val_if_fail (priv->icalcomp != NULL, NULL); - - list = NULL; - - if (type & CALOBJ_TYPE_EVENT) - build_uids_list (&list, priv->events); - - if (type & CALOBJ_TYPE_TODO) - build_uids_list (&list, priv->todos); - - if (type & CALOBJ_TYPE_JOURNAL) - build_uids_list (&list, priv->journals); - - return list; -} - -/* function to resolve timezones */ -static icaltimezone * -resolve_tzid (const char *tzid, gpointer user_data) -{ - icalcomponent *vcalendar_comp = user_data; - - if (!tzid || !tzid[0]) - return NULL; - else if (!strcmp (tzid, "UTC")) - return icaltimezone_get_utc_timezone (); - - return icalcomponent_get_timezone (vcalendar_comp, tzid); -} - -/* Callback used from cal_recur_generate_instances(); adds the component's UID - * to our hash table. - */ -static gboolean -add_instance (CalComponent *comp, time_t start, time_t end, gpointer data) -{ - GHashTable *uid_hash; - const char *uid; - const char *old_uid; - - uid_hash = data; - - /* We only care that the component's UID is listed in the hash table; - * that's why we only allow generation of one instance (i.e. return - * FALSE every time). - */ - - cal_component_get_uid (comp, &uid); - - old_uid = g_hash_table_lookup (uid_hash, uid); - if (old_uid) - return FALSE; - - g_hash_table_insert (uid_hash, (char *) uid, NULL); - return FALSE; -} - -/* Populates a hash table with the UIDs of the components that occur or recur - * within a specific time range. - */ -static void -get_instances_in_range (GHashTable *uid_hash, GList *components, time_t start, time_t end, icaltimezone *default_zone) -{ - GList *l; - - for (l = components; l; l = l->next) { - CalComponent *comp; - icalcomponent *icalcomp, *vcalendar_comp; - - comp = CAL_COMPONENT (l->data); - - /* Get the parent VCALENDAR component, so we can resolve - TZIDs. */ - icalcomp = cal_component_get_icalcomponent (comp); - vcalendar_comp = icalcomponent_get_parent (icalcomp); - g_assert (vcalendar_comp != NULL); - - cal_recur_generate_instances (comp, start, end, add_instance, uid_hash, resolve_tzid, vcalendar_comp, default_zone); - } -} - -/* Used from g_hash_table_foreach(), adds a UID from the hash table to our list */ -static void -add_uid_to_list (gpointer key, gpointer value, gpointer data) -{ - GList **list; - const char *uid; - char *uid_copy; - - list = data; - - uid = key; - uid_copy = g_strdup (uid); - - *list = g_list_prepend (*list, uid_copy); -} - -/* Get_objects_in_range handler for the file backend */ -static GList * -cal_backend_file_get_objects_in_range (CalBackend *backend, CalObjType type, - time_t start, time_t end) -{ - CalBackendFile *cbfile; - CalBackendFilePrivate *priv; - GList *event_list; - GHashTable *uid_hash; - - cbfile = CAL_BACKEND_FILE (backend); - priv = cbfile->priv; - - g_return_val_if_fail (priv->icalcomp != NULL, NULL); - - g_return_val_if_fail (start != -1 && end != -1, NULL); - g_return_val_if_fail (start <= end, NULL); - - uid_hash = g_hash_table_new (g_str_hash, g_str_equal); - - if (type & CALOBJ_TYPE_EVENT) - get_instances_in_range (uid_hash, priv->events, start, end, - priv->default_zone); - - if (type & CALOBJ_TYPE_TODO) - get_instances_in_range (uid_hash, priv->todos, start, end, - priv->default_zone); - - if (type & CALOBJ_TYPE_JOURNAL) - get_instances_in_range (uid_hash, priv->journals, start, end, - priv->default_zone); - - event_list = NULL; - g_hash_table_foreach (uid_hash, add_uid_to_list, &event_list); - g_hash_table_destroy (uid_hash); - - return event_list; -} - -static gboolean -free_busy_instance (CalComponent *comp, - time_t instance_start, - time_t instance_end, - gpointer data) -{ - icalcomponent *vfb = data; - icalproperty *prop; - icalparameter *param; - struct icalperiodtype ipt; - icaltimezone *utc_zone; - - utc_zone = icaltimezone_get_utc_timezone (); - - ipt.start = icaltime_from_timet_with_zone (instance_start, FALSE, utc_zone); - ipt.end = icaltime_from_timet_with_zone (instance_end, FALSE, utc_zone); - ipt.duration = icaldurationtype_null_duration (); - - /* add busy information to the vfb component */ - prop = icalproperty_new (ICAL_FREEBUSY_PROPERTY); - icalproperty_set_freebusy (prop, ipt); - - param = icalparameter_new_fbtype (ICAL_FBTYPE_BUSY); - icalproperty_add_parameter (prop, param); - - icalcomponent_add_property (vfb, prop); - - return TRUE; -} - -static icalcomponent * -create_user_free_busy (CalBackendFile *cbfile, const char *address, const char *cn, - time_t start, time_t end) -{ - CalBackendFilePrivate *priv; - GList *uids; - GList *l; - icalcomponent *vfb; - icaltimezone *utc_zone; - - priv = cbfile->priv; - - /* create the (unique) VFREEBUSY object that we'll return */ - vfb = icalcomponent_new_vfreebusy (); - if (address != NULL) { - icalproperty *prop; - icalparameter *param; - - prop = icalproperty_new_organizer (address); - if (prop != NULL && cn != NULL) { - param = icalparameter_new_cn (cn); - icalproperty_add_parameter (prop, param); - } - if (prop != NULL) - icalcomponent_add_property (vfb, prop); - } - utc_zone = icaltimezone_get_utc_timezone (); - icalcomponent_set_dtstart (vfb, icaltime_from_timet_with_zone (start, FALSE, utc_zone)); - icalcomponent_set_dtend (vfb, icaltime_from_timet_with_zone (end, FALSE, utc_zone)); - - /* add all objects in the given interval */ - - uids = cal_backend_get_objects_in_range (CAL_BACKEND (cbfile), - CALOBJ_TYPE_ANY, start, end); - for (l = uids; l != NULL; l = l->next) { - CalComponent *comp; - icalcomponent *icalcomp, *vcalendar_comp; - icalproperty *prop; - char *uid = (char *) l->data; - - /* get the component from our internal list */ - comp = lookup_component (cbfile, uid); - if (!comp) - continue; - - icalcomp = cal_component_get_icalcomponent (comp); - if (!icalcomp) - continue; - - /* If the event is TRANSPARENT, skip it. */ - prop = icalcomponent_get_first_property (icalcomp, - ICAL_TRANSP_PROPERTY); - if (prop) { - const char *transp_val = icalproperty_get_transp (prop); - if (transp_val - && !strcasecmp (transp_val, "TRANSPARENT")) - continue; - } - - vcalendar_comp = icalcomponent_get_parent (icalcomp); - cal_recur_generate_instances (comp, start, end, - free_busy_instance, - vfb, - resolve_tzid, - vcalendar_comp, - priv->default_zone); - - } - cal_obj_uid_list_free (uids); - - return vfb; -} - -/* Get_free_busy handler for the file backend */ -static GList * -cal_backend_file_get_free_busy (CalBackend *backend, GList *users, time_t start, time_t end) -{ - CalBackendFile *cbfile; - CalBackendFilePrivate *priv; - gchar *address, *name; - icalcomponent *vfb; - char *calobj; - GList *obj_list = NULL; - GList *l; - - cbfile = CAL_BACKEND_FILE (backend); - priv = cbfile->priv; - - g_return_val_if_fail (priv->icalcomp != NULL, NULL); - g_return_val_if_fail (start != -1 && end != -1, NULL); - g_return_val_if_fail (start <= end, NULL); - - if (users == NULL) { - if (cal_backend_mail_account_get_default (priv->db, &address, &name)) { - vfb = create_user_free_busy (cbfile, address, name, start, end); - calobj = icalcomponent_as_ical_string (vfb); - obj_list = g_list_append (obj_list, g_strdup (calobj)); - icalcomponent_free (vfb); - g_free (address); - g_free (name); - } - } else { - for (l = users; l != NULL; l = l->next ) { - address = l->data; - if (cal_backend_mail_account_is_valid (priv->db, address, &name)) { - vfb = create_user_free_busy (cbfile, address, name, start, end); - calobj = icalcomponent_as_ical_string (vfb); - obj_list = g_list_append (obj_list, g_strdup (calobj)); - icalcomponent_free (vfb); - g_free (name); - } - } - } - - return obj_list; -} - -typedef struct -{ - CalBackend *backend; - CalObjType type; - GList *changes; - GList *change_ids; -} CalBackendFileComputeChangesData; - -static void -cal_backend_file_compute_changes_foreach_key (const char *key, gpointer data) -{ - CalBackendFileComputeChangesData *be_data = data; - char *calobj = cal_backend_get_object (be_data->backend, key); - - if (calobj == NULL) { - CalComponent *comp; - GNOME_Evolution_Calendar_CalObjChange *coc; - char *calobj; - - comp = cal_component_new (); - if (be_data->type == GNOME_Evolution_Calendar_TYPE_TODO) - cal_component_set_new_vtype (comp, CAL_COMPONENT_TODO); - else - cal_component_set_new_vtype (comp, CAL_COMPONENT_EVENT); - - cal_component_set_uid (comp, key); - calobj = cal_component_get_as_string (comp); - - coc = GNOME_Evolution_Calendar_CalObjChange__alloc (); - coc->calobj = CORBA_string_dup (calobj); - coc->type = GNOME_Evolution_Calendar_DELETED; - be_data->changes = g_list_prepend (be_data->changes, coc); - be_data->change_ids = g_list_prepend (be_data->change_ids, g_strdup (key)); - - g_free (calobj); - gtk_object_unref (GTK_OBJECT (comp)); - } -} - -static GNOME_Evolution_Calendar_CalObjChangeSeq * -cal_backend_file_compute_changes (CalBackend *backend, CalObjType type, const char *change_id) -{ - char *filename; - EDbHash *ehash; - CalBackendFileComputeChangesData be_data; - GNOME_Evolution_Calendar_CalObjChangeSeq *seq; - GList *uids, *changes = NULL, *change_ids = NULL; - GList *i, *j; - int n; - - /* Find the changed ids - FIX ME, path should not be hard coded */ - if (type == GNOME_Evolution_Calendar_TYPE_TODO) - filename = g_strdup_printf ("%s/evolution/local/Tasks/%s.db", g_get_home_dir (), change_id); - else - filename = g_strdup_printf ("%s/evolution/local/Calendar/%s.db", g_get_home_dir (), change_id); - ehash = e_dbhash_new (filename); - g_free (filename); - - uids = cal_backend_get_uids (backend, type); - - /* Calculate adds and modifies */ - for (i = uids; i != NULL; i = i->next) { - GNOME_Evolution_Calendar_CalObjChange *coc; - char *uid = i->data; - char *calobj = cal_backend_get_object (backend, uid); - - g_assert (calobj != NULL); - - /* check what type of change has occurred, if any */ - switch (e_dbhash_compare (ehash, uid, calobj)) { - case E_DBHASH_STATUS_SAME: - break; - case E_DBHASH_STATUS_NOT_FOUND: - coc = GNOME_Evolution_Calendar_CalObjChange__alloc (); - coc->calobj = CORBA_string_dup (calobj); - coc->type = GNOME_Evolution_Calendar_ADDED; - changes = g_list_prepend (changes, coc); - change_ids = g_list_prepend (change_ids, g_strdup (uid)); - break; - case E_DBHASH_STATUS_DIFFERENT: - coc = GNOME_Evolution_Calendar_CalObjChange__alloc (); - coc->calobj = CORBA_string_dup (calobj); - coc->type = GNOME_Evolution_Calendar_MODIFIED; - changes = g_list_prepend (changes, coc); - change_ids = g_list_prepend (change_ids, g_strdup (uid)); - break; - } - } - - /* Calculate deletions */ - be_data.backend = backend; - be_data.type = type; - be_data.changes = changes; - be_data.change_ids = change_ids; - e_dbhash_foreach_key (ehash, (EDbHashFunc)cal_backend_file_compute_changes_foreach_key, &be_data); - changes = be_data.changes; - change_ids = be_data.change_ids; - - /* Build the sequence and update the hash */ - n = g_list_length (changes); - - seq = GNOME_Evolution_Calendar_CalObjChangeSeq__alloc (); - seq->_length = n; - seq->_buffer = CORBA_sequence_GNOME_Evolution_Calendar_CalObjChange_allocbuf (n); - CORBA_sequence_set_release (seq, TRUE); - - for (i = changes, j = change_ids, n = 0; i != NULL; i = i->next, j = j->next, n++) { - GNOME_Evolution_Calendar_CalObjChange *coc = i->data; - GNOME_Evolution_Calendar_CalObjChange *seq_coc; - char *uid = j->data; - - /* sequence building */ - seq_coc = &seq->_buffer[n]; - seq_coc->calobj = CORBA_string_dup (coc->calobj); - seq_coc->type = coc->type; - - /* hash updating */ - if (coc->type == GNOME_Evolution_Calendar_ADDED - || coc->type == GNOME_Evolution_Calendar_MODIFIED) { - e_dbhash_add (ehash, uid, coc->calobj); - } else { - e_dbhash_remove (ehash, uid); - } - - CORBA_free (coc); - g_free (uid); - } - e_dbhash_write (ehash); - e_dbhash_destroy (ehash); - - cal_obj_uid_list_free (uids); - g_list_free (change_ids); - g_list_free (changes); - - return seq; -} - -/* Get_changes handler for the file backend */ -static GNOME_Evolution_Calendar_CalObjChangeSeq * -cal_backend_file_get_changes (CalBackend *backend, CalObjType type, const char *change_id) -{ - g_return_val_if_fail (backend != NULL, NULL); - g_return_val_if_fail (IS_CAL_BACKEND (backend), NULL); - - return cal_backend_file_compute_changes (backend, type, change_id); -} - -/* Get_alarms_in_range handler for the file backend */ -static GNOME_Evolution_Calendar_CalComponentAlarmsSeq * -cal_backend_file_get_alarms_in_range (CalBackend *backend, - time_t start, time_t end) -{ - CalBackendFile *cbfile; - CalBackendFilePrivate *priv; - int n_comp_alarms; - GSList *comp_alarms; - GSList *l; - int i; - GNOME_Evolution_Calendar_CalComponentAlarmsSeq *seq; - - cbfile = CAL_BACKEND_FILE (backend); - priv = cbfile->priv; - - g_return_val_if_fail (priv->icalcomp != NULL, NULL); - - g_return_val_if_fail (start != -1 && end != -1, NULL); - g_return_val_if_fail (start <= end, NULL); - - /* Per RFC 2445, only VEVENTs and VTODOs can have alarms */ - - n_comp_alarms = 0; - comp_alarms = NULL; - - n_comp_alarms += cal_util_generate_alarms_for_list (priv->events, start, end, - &comp_alarms, resolve_tzid, - priv->icalcomp, - priv->default_zone); - n_comp_alarms += cal_util_generate_alarms_for_list (priv->todos, start, end, - &comp_alarms, resolve_tzid, - priv->icalcomp, - priv->default_zone); - - seq = GNOME_Evolution_Calendar_CalComponentAlarmsSeq__alloc (); - CORBA_sequence_set_release (seq, TRUE); - seq->_length = n_comp_alarms; - seq->_buffer = CORBA_sequence_GNOME_Evolution_Calendar_CalComponentAlarms_allocbuf ( - n_comp_alarms); - - for (l = comp_alarms, i = 0; l; l = l->next, i++) { - CalComponentAlarms *alarms; - char *comp_str; - - alarms = l->data; - - comp_str = cal_component_get_as_string (alarms->comp); - seq->_buffer[i].calobj = CORBA_string_dup (comp_str); - g_free (comp_str); - - cal_backend_util_fill_alarm_instances_seq (&seq->_buffer[i].alarms, alarms->alarms); - - cal_component_alarms_free (alarms); - } - - g_slist_free (comp_alarms); - - return seq; -} - -/* Get_alarms_for_object handler for the file backend */ -static GNOME_Evolution_Calendar_CalComponentAlarms * -cal_backend_file_get_alarms_for_object (CalBackend *backend, const char *uid, - time_t start, time_t end, - gboolean *object_found) -{ - CalBackendFile *cbfile; - CalBackendFilePrivate *priv; - CalComponent *comp; - char *comp_str; - GNOME_Evolution_Calendar_CalComponentAlarms *corba_alarms; - CalComponentAlarms *alarms; - - cbfile = CAL_BACKEND_FILE (backend); - priv = cbfile->priv; - - g_return_val_if_fail (priv->icalcomp != NULL, NULL); - - g_return_val_if_fail (uid != NULL, NULL); - g_return_val_if_fail (start != -1 && end != -1, NULL); - g_return_val_if_fail (start <= end, NULL); - g_return_val_if_fail (object_found != NULL, NULL); - - comp = lookup_component (cbfile, uid); - if (!comp) { - *object_found = FALSE; - return NULL; - } - - *object_found = TRUE; - - comp_str = cal_component_get_as_string (comp); - corba_alarms = GNOME_Evolution_Calendar_CalComponentAlarms__alloc (); - - corba_alarms->calobj = CORBA_string_dup (comp_str); - g_free (comp_str); - - alarms = cal_util_generate_alarms_for_comp (comp, start, end, resolve_tzid, priv->icalcomp, priv->default_zone); - if (alarms) { - cal_backend_util_fill_alarm_instances_seq (&corba_alarms->alarms, alarms->alarms); - cal_component_alarms_free (alarms); - } else - cal_backend_util_fill_alarm_instances_seq (&corba_alarms->alarms, NULL); - - return corba_alarms; -} - -/* Notifies a backend's clients that an object was updated */ -static void -notify_update (CalBackendFile *cbfile, const char *uid) -{ - CalBackendFilePrivate *priv; - GList *l; - - priv = cbfile->priv; - - cal_backend_obj_updated (CAL_BACKEND (cbfile), uid); - - for (l = CAL_BACKEND (cbfile)->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 (CalBackendFile *cbfile, const char *uid) -{ - CalBackendFilePrivate *priv; - GList *l; - - priv = cbfile->priv; - - cal_backend_obj_removed (CAL_BACKEND (cbfile), uid); - - for (l = CAL_BACKEND (cbfile)->clients; l; l = l->next) { - Cal *cal; - - cal = CAL (l->data); - cal_notify_remove (cal, uid); - } -} - -/* Used from g_hash_table_foreach_remove(); removes and frees a category */ -static gboolean -remove_category_cb (gpointer key, gpointer value, gpointer data) -{ - Category *c; - - c = value; - g_free (c->name); - g_free (c); - - return TRUE; -} - -/* Clears the table of removed categories */ -static void -clean_removed_categories (CalBackendFile *cbfile) -{ - CalBackendFilePrivate *priv; - - priv = cbfile->priv; - - g_hash_table_foreach_remove (priv->removed_categories, - remove_category_cb, - NULL); -} - - -/* Creates a CalComponent for the given icalcomponent and adds it to our - cache. Note that the icalcomponent is not added to the toplevel - icalcomponent here. That needs to be done elsewhere. It returns the uid - of the added component, or NULL if it failed. */ -static const char* -cal_backend_file_update_object (CalBackendFile *cbfile, - icalcomponent *icalcomp) -{ - CalComponent *old_comp; - CalComponent *comp; - const char *comp_uid; - - /* Create a CalComponent wrapper for the icalcomponent. */ - comp = cal_component_new (); - if (!cal_component_set_icalcomponent (comp, icalcomp)) { - gtk_object_unref (GTK_OBJECT (comp)); - return NULL; - } - - /* Get the UID, and check it isn't empty. */ - cal_component_get_uid (comp, &comp_uid); - if (!comp_uid || !comp_uid[0]) { - gtk_object_unref (GTK_OBJECT (comp)); - return NULL; - } - - /* Remove any old version of the component. */ - old_comp = lookup_component (cbfile, comp_uid); - if (old_comp) - remove_component (cbfile, old_comp); - - /* Now add the component to our local cache, but we pass FALSE as - the last argument, since the libical component is assumed to have - been added already. */ - add_component (cbfile, comp, FALSE); - - return comp_uid; -} - - - -/* Update_objects handler for the file backend. */ -static gboolean -cal_backend_file_update_objects (CalBackend *backend, const char *calobj) -{ - CalBackendFile *cbfile; - CalBackendFilePrivate *priv; - icalcomponent *toplevel_comp, *icalcomp = NULL; - icalcomponent_kind kind; - int old_n_categories, new_n_categories; - icalcomponent *subcomp; - gboolean retval = TRUE; - GList *comp_uid_list = NULL, *elem; - - cbfile = CAL_BACKEND_FILE (backend); - priv = cbfile->priv; - - g_return_val_if_fail (priv->icalcomp != NULL, FALSE); - - g_return_val_if_fail (calobj != NULL, FALSE); - - /* Pull the component from the string and ensure that it is sane */ - - toplevel_comp = icalparser_parse_string ((char *) calobj); - - if (!toplevel_comp) - return FALSE; - - kind = icalcomponent_isa (toplevel_comp); - - if (kind == ICAL_VEVENT_COMPONENT - || kind == ICAL_VTODO_COMPONENT - || kind == ICAL_VJOURNAL_COMPONENT) { - /* Create a temporary toplevel component and put the VEVENT - or VTODO in it, to simplify the code below. */ - icalcomp = toplevel_comp; - toplevel_comp = cal_util_new_top_level (); - icalcomponent_add_component (toplevel_comp, icalcomp); - } else if (kind != ICAL_VCALENDAR_COMPONENT) { - /* We don't support this type of component */ - icalcomponent_free (toplevel_comp); - return FALSE; - } - - /* The list of removed categories must be empty because we are about to - * start a new scanning process. - */ - g_assert (g_hash_table_size (priv->removed_categories) == 0); - - old_n_categories = g_hash_table_size (priv->categories); - - /* Step throught the VEVENT/VTODOs being added, create CalComponents - for them, and add them to our cache. */ - subcomp = icalcomponent_get_first_component (toplevel_comp, - ICAL_ANY_COMPONENT); - while (subcomp) { - /* We ignore anything except VEVENT, VTODO and VJOURNAL - components. */ - icalcomponent_kind child_kind = icalcomponent_isa (subcomp); - if (child_kind == ICAL_VEVENT_COMPONENT - || child_kind == ICAL_VTODO_COMPONENT - || child_kind == ICAL_VJOURNAL_COMPONENT) { - const char *comp_uid; - - comp_uid = cal_backend_file_update_object (cbfile, - subcomp); - if (comp_uid) { - /* We add a copy of the UID to a list, so we - can emit notification signals later. We do - a g_strdup() in case any of the components - get removed while we are emitting - notification signals. */ - comp_uid_list = g_list_prepend (comp_uid_list, - g_strdup (comp_uid)); - } else { - retval = FALSE; - } - } - subcomp = icalcomponent_get_next_component (toplevel_comp, - ICAL_ANY_COMPONENT); - } - - /* Merge the iCalendar components with our existing VCALENDAR, - resolving any conflicting TZIDs. */ - icalcomponent_merge_component (priv->icalcomp, toplevel_comp); - - new_n_categories = g_hash_table_size (priv->categories); - - mark_dirty (cbfile); - - /* Now emit notification signals for all of the added components. - We do this after adding them all to make sure the calendar is in a - stable state before emitting signals. */ - for (elem = comp_uid_list; elem; elem = elem->next) { - char *comp_uid = elem->data; - notify_update (cbfile, comp_uid); - g_free (comp_uid); - } - g_list_free (comp_uid_list); - - if (old_n_categories != new_n_categories || - g_hash_table_size (priv->removed_categories) != 0) { - clean_removed_categories (cbfile); - notify_categories_changed (cbfile); - } - - return retval; -} - - -/* Remove_object handler for the file backend */ -static gboolean -cal_backend_file_remove_object (CalBackend *backend, const char *uid) -{ - CalBackendFile *cbfile; - CalBackendFilePrivate *priv; - CalComponent *comp; - - cbfile = CAL_BACKEND_FILE (backend); - priv = cbfile->priv; - - g_return_val_if_fail (priv->icalcomp != NULL, FALSE); - - g_return_val_if_fail (uid != NULL, FALSE); - - comp = lookup_component (cbfile, uid); - if (!comp) - return FALSE; - - /* The list of removed categories must be empty because we are about to - * start a new scanning process. - */ - g_assert (g_hash_table_size (priv->removed_categories) == 0); - - remove_component (cbfile, comp); - - mark_dirty (cbfile); - - notify_remove (cbfile, uid); - - if (g_hash_table_size (priv->removed_categories) != 0) { - clean_removed_categories (cbfile); - notify_categories_changed (cbfile); - } - - return TRUE; -} - - -static icaltimezone* -cal_backend_file_get_timezone (CalBackend *backend, const char *tzid) -{ - CalBackendFile *cbfile; - CalBackendFilePrivate *priv; - - cbfile = CAL_BACKEND_FILE (backend); - priv = cbfile->priv; - - g_return_val_if_fail (priv->icalcomp != NULL, NULL); - - if (!strcmp (tzid, "UTC")) - return icaltimezone_get_utc_timezone (); - else - return icalcomponent_get_timezone (priv->icalcomp, tzid); -} - - -static icaltimezone* -cal_backend_file_get_default_timezone (CalBackend *backend) -{ - CalBackendFile *cbfile; - CalBackendFilePrivate *priv; - - cbfile = CAL_BACKEND_FILE (backend); - priv = cbfile->priv; - - g_return_val_if_fail (priv->icalcomp != NULL, NULL); - - return priv->default_zone; -} - - -static gboolean -cal_backend_file_set_default_timezone (CalBackend *backend, - const char *tzid) -{ - CalBackendFile *cbfile; - CalBackendFilePrivate *priv; - icaltimezone *zone; - - cbfile = CAL_BACKEND_FILE (backend); - priv = cbfile->priv; - - g_return_val_if_fail (priv->icalcomp != NULL, FALSE); - - /* Look up the VTIMEZONE in our icalcomponent. */ - zone = icalcomponent_get_timezone (priv->icalcomp, tzid); - if (!zone) - return FALSE; - - /* Set the default timezone to it. */ - priv->default_zone = zone; - - return TRUE; -} - |