NS_IMETHODIMP
calIcalProperty::SetValueAsIcalString(const nsACString &str)
{
const char *kindstr =
icalvalue_kind_to_string(icalproperty_kind_to_value_kind(icalproperty_isa(mProperty)));
icalproperty_set_value_from_string(mProperty,
PromiseFlatCString(str).get(),
kindstr);
return NS_OK;
}
NS_IMETHODIMP
calIcalProperty::SetValue(const nsACString &str)
{
icalvalue_kind kind = icalproperty_kind_to_value_kind(icalproperty_isa(mProperty));
if (kind == ICAL_TEXT_VALUE) {
icalvalue *v = icalvalue_new_text(PromiseFlatCString(str).get());
icalproperty_set_value(mProperty, v);
} else if (kind == ICAL_X_VALUE) {
icalvalue *v = icalvalue_new_x(PromiseFlatCString(str).get());
icalproperty_set_value(mProperty, v);
} else if (kind == ICAL_ATTACH_VALUE) {
const char *strdata = PromiseFlatCString(str).get();
icalattach *v = icalattach_new_from_data(strdata, nullptr, nullptr);
icalproperty_set_attach(mProperty, v);
} else {
icalproperty_set_value_from_string(mProperty,
PromiseFlatCString(str).get(),
icalvalue_kind_to_string(kind));
}
return NS_OK;
}
/**
* e_cal_client_check_timezones:
* @comp: a VCALENDAR containing a list of
* VTIMEZONE and arbitrary other components, in
* arbitrary order: these other components are
* modified by this call
* @comps: (element-type icalcomponent) (allow-none): a list of #icalcomponent
* instances which also have to be patched; may be %NULL
* @tzlookup: a callback function which is called to retrieve
* a calendar's VTIMEZONE definition; the returned
* definition is *not* freed by e_cal_client_check_timezones()
* (to be compatible with e_cal_get_timezone());
* NULL indicates that no such timezone exists
* or an error occurred
* @ecalclient: an arbitrary pointer which is passed through to
* the @tzlookup function
* @cancellable: a #GCancellable to use in @tzlookup function
* @error: an error description in case of a failure
*
* This function cleans up VEVENT, VJOURNAL, VTODO and VTIMEZONE
* items which are to be imported into Evolution.
*
* Using VTIMEZONE definitions is problematic because they cannot be
* updated properly when timezone definitions change. They are also
* incomplete (for compatibility reason only one set of rules for
* summer saving changes can be included, even if different rules
* apply in different years). This function looks for matches of the
* used TZIDs against system timezones and replaces such TZIDs with
* the corresponding system timezone. This works for TZIDs containing
* a location (found via a fuzzy string search) and for Outlook TZIDs
* (via a hard-coded lookup table).
*
* Some programs generate broken meeting invitations with TZID, but
* without including the corresponding VTIMEZONE. Importing such
* invitations unchanged causes problems later on (meeting displayed
* incorrectly, e_cal_get_component_as_string() fails). The situation
* where this occurred in the past (found by a SyncEvolution user) is
* now handled via the location based mapping.
*
* If this mapping fails, this function also deals with VTIMEZONE
* conflicts: such conflicts occur when the calendar already contains
* an old VTIMEZONE definition with the same TZID, but different
* summer saving rules. Replacing the VTIMEZONE potentially breaks
* displaying of old events, whereas not replacing it breaks the new
* events (the behavior in Evolution <= 2.22.1).
*
* The way this problem is resolved is by renaming the new VTIMEZONE
* definition until the TZID is unique. A running count is appended to
* the TZID. All items referencing the renamed TZID are adapted
* accordingly.
*
* Returns: %TRUE if successful, %FALSE otherwise.
*
* Since: 3.2
**/
gboolean
e_cal_client_check_timezones (icalcomponent *comp,
GList *comps,
icaltimezone *(*tzlookup) (const gchar *tzid,
gconstpointer ecalclient,
GCancellable *cancellable,
GError **error),
gconstpointer ecalclient,
GCancellable *cancellable,
GError **error)
{
gboolean success = TRUE;
icalcomponent *subcomp = NULL;
icaltimezone *zone = icaltimezone_new ();
gchar *key = NULL, *value = NULL;
gchar *buffer = NULL;
gchar *zonestr = NULL;
gchar *tzid = NULL;
GList *l;
/* a hash from old to new tzid; strings dynamically allocated */
GHashTable *mapping = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
/* a hash of all system time zone IDs which have to be added; strings are shared with mapping hash */
GHashTable *systemtzids = g_hash_table_new (g_str_hash, g_str_equal);
*error = NULL;
if (!mapping || !zone) {
goto nomem;
}
/* iterate over all VTIMEZONE definitions */
subcomp = icalcomponent_get_first_component (comp, ICAL_VTIMEZONE_COMPONENT);
while (subcomp) {
if (icaltimezone_set_component (zone, subcomp)) {
g_free (tzid);
tzid = g_strdup (icaltimezone_get_tzid (zone));
if (tzid) {
const gchar *newtzid = e_cal_match_tzid (tzid);
if (newtzid) {
/* matched against system time zone */
g_free (key);
key = g_strdup (tzid);
if (!key) {
goto nomem;
}
g_free (value);
value = g_strdup (newtzid);
if (!value) {
goto nomem;
}
g_hash_table_insert (mapping, key, value);
g_hash_table_insert (systemtzids, value, NULL);
key = value = NULL;
} else {
gint counter;
zonestr = icalcomponent_as_ical_string_r (subcomp);
/* check for collisions with existing timezones */
for (counter = 0;
counter < 100 /* sanity limit */;
counter++) {
icaltimezone *existing_zone;
if (counter) {
g_free (value);
value = g_strdup_printf ("%s %d", tzid, counter);
}
existing_zone = tzlookup (counter ? value : tzid, ecalclient, cancellable, error);
if (!existing_zone) {
if (*error) {
goto failed;
} else {
break;
}
}
g_free (buffer);
buffer = icalcomponent_as_ical_string_r (icaltimezone_get_component (existing_zone));
if (counter) {
gchar *fulltzid = g_strdup_printf ("TZID:%s", value);
gsize baselen = strlen ("TZID:") + strlen (tzid);
gsize fulllen = strlen (fulltzid);
gchar *tzidprop;
/*
* Map TZID with counter suffix back to basename.
*/
tzidprop = strstr (buffer, fulltzid);
if (tzidprop) {
memmove (
tzidprop + baselen,
tzidprop + fulllen,
strlen (tzidprop + fulllen) + 1);
}
g_free (fulltzid);
}
/*
* If the strings are identical, then the
* VTIMEZONE definitions are identical. If
* they are not identical, then VTIMEZONE
* definitions might still be semantically
* correct and we waste some space by
* needlesly duplicating the VTIMEZONE. This
* is expected to occur rarely (if at all) in
* practice.
*/
if (!strcmp (zonestr, buffer)) {
break;
}
}
if (!counter) {
/* does not exist, nothing to do */
} else {
/* timezone renamed */
icalproperty *prop = icalcomponent_get_first_property (subcomp, ICAL_TZID_PROPERTY);
while (prop) {
icalproperty_set_value_from_string (prop, value, "NO");
prop = icalcomponent_get_next_property (subcomp, ICAL_ANY_PROPERTY);
}
g_free (key);
key = g_strdup (tzid);
g_hash_table_insert (mapping, key, value);
key = value = NULL;
}
}
}
}
subcomp = icalcomponent_get_next_component (comp, ICAL_VTIMEZONE_COMPONENT);
}
/*
* now replace all TZID parameters in place
*/
subcomp = icalcomponent_get_first_component (comp, ICAL_ANY_COMPONENT);
while (subcomp) {
/*
* Leave VTIMEZONE unchanged, iterate over properties of
* everything else.
*
* Note that no attempt is made to remove unused VTIMEZONE
* definitions. That would just make the code more complex for
* little additional gain. However, newly used time zones are
* added below.
*/
patch_tzids (subcomp, mapping);
subcomp = icalcomponent_get_next_component (comp, ICAL_ANY_COMPONENT);
}
for (l = comps; l; l = l->next) {
patch_tzids (l->data, mapping);
}
/*
* add system time zones that we mapped to: adding them ensures
* that the VCALENDAR remains consistent
*/
g_hash_table_foreach (systemtzids, addsystemtz, comp);
goto done;
nomem:
/* set gerror for "out of memory" if possible, otherwise abort via g_error() */
*error = g_error_new (E_CLIENT_ERROR, E_CLIENT_ERROR_OTHER_ERROR, "out of memory");
if (!*error) {
g_error ("e_cal_check_timezones(): out of memory, cannot proceed - sorry!");
}
failed:
/* gerror should have been set already */
success = FALSE;
done:
if (mapping) {
g_hash_table_destroy (mapping);
}
if (systemtzids) {
g_hash_table_destroy (systemtzids);
}
if (zone) {
icaltimezone_free (zone, 1);
}
g_free (tzid);
g_free (zonestr);
g_free (buffer);
g_free (key);
g_free (value);
return success;
}
