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/*
* Copyright (c) 2023 Balazs Scheidler <balazs.scheidler@axoflow.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation, 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., 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.
*
*/
typedef struct _TFTagState
{
LogTagId tag_id;
GString *value_if_set;
GString *value_if_unset;
gboolean value_is_boolean;
} TFTagState;
static gboolean
tf_tag_prepare(LogTemplateFunction *self, gpointer s, LogTemplate *parent, gint argc, gchar *argv[],
GError **error)
{
TFTagState *state = (TFTagState *) s;
if (argc < 2 || argc > 4)
{
g_set_error(error, LOG_TEMPLATE_ERROR, LOG_TEMPLATE_ERROR_COMPILE,
"Wrong number of arguments. Example: $(tag tag-name value-if-set value-if-unset).\n");
return FALSE;
}
state->tag_id = log_tags_get_by_name(argv[1]);
state->value_if_set = g_string_new(argc >= 3 ? argv[2] : "1");
state->value_if_unset = g_string_new(argc >= 4 ? argv[3] : "0");
state->value_is_boolean = argc < 3;
return TRUE;
}
static void
tf_tag_call(LogTemplateFunction *self, gpointer s, const LogTemplateInvokeArgs *args, GString *result,
LogMessageValueType *type)
{
TFTagState *state = (TFTagState *) s;
LogMessage *msg = args->messages[0];
*type = state->value_is_boolean ? LM_VT_BOOLEAN : LM_VT_STRING;
if (log_msg_is_tag_by_id(msg, state->tag_id))
g_string_append_len(result, state->value_if_set->str, state->value_if_set->len);
else
g_string_append_len(result, state->value_if_unset->str, state->value_if_unset->len);
}
static void
tf_tag_free_state(gpointer s)
{
TFTagState *state = (TFTagState *) s;
g_string_free(state->value_if_set, TRUE);
g_string_free(state->value_if_unset, TRUE);
}
TEMPLATE_FUNCTION(TFTagState, tf_tag, tf_tag_prepare, NULL, tf_tag_call, tf_tag_free_state, NULL);
typedef struct _TFTagsHeadState
{
LogTagId *tags;
gint tags_count;
} TFTagsHeadState;
static gboolean
tf_tags_head_prepare(LogTemplateFunction *self, gpointer s, LogTemplate *parent,
gint argc, gchar *argv[],
GError **error)
{
TFTagsHeadState *state = (TFTagsHeadState *) s;
if (argc < 2)
{
g_set_error(error, LOG_TEMPLATE_ERROR, LOG_TEMPLATE_ERROR_COMPILE,
"At least one tag is required. Example: $(tags-head tag1 tag2 ... ).\n");
return FALSE;
}
GArray *l = g_array_new(FALSE, TRUE, sizeof(LogTagId));
for (gint i = 1; i < argc; i++)
{
LogTagId tag_id = log_tags_get_by_name(argv[i]);
g_array_append_val(l, tag_id);
}
state->tags_count = l->len;
state->tags = (LogTagId *) g_array_free(l, FALSE);
return TRUE;
}
static void
tf_tags_head_call(LogTemplateFunction *self, gpointer s,
const LogTemplateInvokeArgs *args,
GString *result, LogMessageValueType *type)
{
TFTagsHeadState *state = (TFTagsHeadState *) s;
LogMessage *msg = args->messages[0];
for (gint i = 0; i < state->tags_count; i++)
{
LogTagId id = state->tags[i];
if (log_msg_is_tag_by_id(msg, id))
{
g_string_append(result, log_tags_get_by_id(id));
*type = LM_VT_STRING;
return;
}
}
*type = LM_VT_NULL;
}
static void
tf_tags_head_free_state(gpointer s)
{
TFTagsHeadState *state = (TFTagsHeadState *) s;
g_free(state->tags);
}
TEMPLATE_FUNCTION(TFTagsHeadState, tf_tags_head,
tf_tags_head_prepare, NULL, tf_tags_head_call, tf_tags_head_free_state,
NULL);
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