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/*
* Copyright (c) 2020 Balabit
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As an additional exemption you are allowed to compile & link against the
* OpenSSL libraries as published by the OpenSSL project. See the file
* COPYING for details.
*
*/
static gboolean
tf_filter_prepare(LogTemplateFunction *self, gpointer s, LogTemplate *parent, gint argc, gchar *argv[],
GError **error)
{
if (argc != 3)
{
g_set_error(error, LOG_TEMPLATE_ERROR, LOG_TEMPLATE_ERROR_COMPILE,
"Wrong number of arguments. Example: $(filter expr list).\n");
return FALSE;
}
return tf_cond_prepare(self, s, parent, argc, argv, error);
}
static void
tf_filter_call(LogTemplateFunction *self, gpointer s, const LogTemplateInvokeArgs *args, GString *result,
LogMessageValueType *type)
{
ListScanner scanner;
gsize initial_len = result->len;
TFCondState *state = (TFCondState *)s;
GString *lst = args->argv[0];
*type = LM_VT_STRING;
list_scanner_init(&scanner);
list_scanner_input_string(&scanner, lst->str, lst->len);
LogTemplateEvalOptions copy_options = *args->options;
while (list_scanner_scan_next(&scanner))
{
const gchar *current = list_scanner_get_current_value(&scanner);
copy_options.context_id = current;
gboolean filter_result = filter_expr_eval_with_context(state->filter, args->messages, args->num_messages,
©_options);
if (filter_result)
{
_append_comma_between_list_elements_if_needed(result, initial_len);
g_string_append(result, current);
}
}
list_scanner_deinit(&scanner);
}
TEMPLATE_FUNCTION(TFCondState, tf_filter, tf_filter_prepare, tf_simple_func_eval,
tf_filter_call, tf_cond_free_state, NULL);
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