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/*
This file is part of TALER
(C) 2024 Taler Systems SA
TALER is free software; you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation; either version 3,
or (at your option) any later version.
TALER 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 TALER; see the file COPYING. If not,
see <http://www.gnu.org/licenses/>
*/
/**
* @file taler-merchant-httpd_private-post-categories.c
* @brief implementing POST /private/categories request handling
* @author Christian Grothoff
*/
#include "platform.h"
#include "taler-merchant-httpd_private-post-categories.h"
#include "taler-merchant-httpd_helper.h"
#include <taler/taler_json_lib.h>
/**
* How often do we retry the simple INSERT database transaction?
*/
#define MAX_RETRIES 3
MHD_RESULT
TMH_private_post_categories (const struct TMH_RequestHandler *rh,
struct MHD_Connection *connection,
struct TMH_HandlerContext *hc)
{
struct TMH_MerchantInstance *mi = hc->instance;
const char *category_name;
const json_t *category_name_i18n;
uint64_t category_id;
struct GNUNET_JSON_Specification spec[] = {
GNUNET_JSON_spec_string ("name",
&category_name),
GNUNET_JSON_spec_object_const ("name_i18n",
&category_name_i18n),
GNUNET_JSON_spec_end ()
};
enum GNUNET_DB_QueryStatus qs;
GNUNET_assert (NULL != mi);
{
enum GNUNET_GenericReturnValue res;
res = TALER_MHD_parse_json_data (connection,
hc->request_body,
spec);
if (GNUNET_OK != res)
{
GNUNET_break_op (0);
return (GNUNET_NO == res)
? MHD_YES
: MHD_NO;
}
}
/* finally, interact with DB until no serialization error */
for (unsigned int i = 0; i<MAX_RETRIES; i++)
{
json_t *xcategory_name_i18n;
if (GNUNET_OK !=
TMH_db->start (TMH_db->cls,
"POST /categories"))
{
GNUNET_break (0);
GNUNET_JSON_parse_free (spec);
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_INTERNAL_SERVER_ERROR,
TALER_EC_GENERIC_DB_START_FAILED,
NULL);
}
qs = TMH_db->select_category_by_name (TMH_db->cls,
mi->settings.id,
category_name,
&xcategory_name_i18n,
&category_id);
switch (qs)
{
case GNUNET_DB_STATUS_HARD_ERROR:
/* Clean up and fail hard */
GNUNET_break (0);
TMH_db->rollback (TMH_db->cls);
GNUNET_JSON_parse_free (spec);
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_INTERNAL_SERVER_ERROR,
TALER_EC_GENERIC_DB_FETCH_FAILED,
NULL);
case GNUNET_DB_STATUS_SOFT_ERROR:
/* restart transaction */
goto retry;
case GNUNET_DB_STATUS_SUCCESS_NO_RESULTS:
/* Good, we can proceed! */
break;
case GNUNET_DB_STATUS_SUCCESS_ONE_RESULT:
/* idempotency check: is etp == tp? */
{
bool eq;
eq = (1 == json_equal (xcategory_name_i18n,
category_name_i18n));
json_decref (xcategory_name_i18n);
TMH_db->rollback (TMH_db->cls);
GNUNET_JSON_parse_free (spec);
return eq
? TALER_MHD_REPLY_JSON_PACK (connection,
MHD_HTTP_OK,
GNUNET_JSON_pack_uint64 ("category_id",
category_id))
: TALER_MHD_reply_with_error (connection,
MHD_HTTP_CONFLICT,
TALER_EC_MERCHANT_PRIVATE_POST_CATEGORIES_CONFLICT_CATEGORY_EXISTS,
category_name);
}
} /* end switch (qs) */
qs = TMH_db->insert_category (TMH_db->cls,
mi->settings.id,
category_name,
category_name_i18n,
&category_id);
if (GNUNET_DB_STATUS_HARD_ERROR == qs)
{
TMH_db->rollback (TMH_db->cls);
break;
}
if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT == qs)
{
qs = TMH_db->commit (TMH_db->cls);
if (GNUNET_DB_STATUS_SOFT_ERROR != qs)
break;
}
retry:
GNUNET_assert (GNUNET_DB_STATUS_SOFT_ERROR == qs);
TMH_db->rollback (TMH_db->cls);
} /* for RETRIES loop */
GNUNET_JSON_parse_free (spec);
if (qs < 0)
{
GNUNET_break (0);
return TALER_MHD_reply_with_error (
connection,
MHD_HTTP_INTERNAL_SERVER_ERROR,
(GNUNET_DB_STATUS_SOFT_ERROR == qs)
? TALER_EC_GENERIC_DB_SOFT_FAILURE
: TALER_EC_GENERIC_DB_COMMIT_FAILED,
NULL);
}
return TALER_MHD_REPLY_JSON_PACK (
connection,
MHD_HTTP_OK,
GNUNET_JSON_pack_uint64 ("category_id",
category_id));
}
/* end of taler-merchant-httpd_private-post-categories.c */
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