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/*
This file is part of TALER
(C) 2023 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-token-families.c
* @brief implementing POST /tokenfamilies request handling
* @author Christian Blättler
*/
#include "platform.h"
#include "taler-merchant-httpd_private-post-token-families.h"
#include "taler-merchant-httpd_helper.h"
#include <gnunet/gnunet_time_lib.h>
#include <taler/taler_json_lib.h>
/**
* How often do we retry the simple INSERT database transaction?
*/
#define MAX_RETRIES 3
/**
* Check if the two token families are identical.
*
* @param tf1 token family to compare
* @param tf2 other token family to compare
* @return true if they are 'equal', false if not
*/
static bool
token_families_equal (const struct TALER_MERCHANTDB_TokenFamilyDetails *tf1,
const struct TALER_MERCHANTDB_TokenFamilyDetails *tf2)
{
return ( (0 == strcmp (tf1->slug,
tf2->slug)) &&
(0 == strcmp (tf1->name,
tf2->name)) &&
(0 == strcmp (tf1->description,
tf2->description)) &&
(1 == json_equal (tf1->description_i18n,
tf2->description_i18n)) &&
(GNUNET_TIME_timestamp_cmp (tf1->valid_after,
==,
tf2->valid_after)) &&
(GNUNET_TIME_timestamp_cmp (tf1->valid_before,
==,
tf2->valid_before)) &&
(GNUNET_TIME_relative_cmp (tf1->duration,
==,
tf2->duration)) &&
(tf1->kind == tf2->kind) );
}
MHD_RESULT
TMH_private_post_token_families (const struct TMH_RequestHandler *rh,
struct MHD_Connection *connection,
struct TMH_HandlerContext *hc)
{
struct TMH_MerchantInstance *mi = hc->instance;
struct TALER_MERCHANTDB_TokenFamilyDetails details = { 0 };
const char *kind = NULL;
bool no_valid_after = false;
enum GNUNET_DB_QueryStatus qs;
struct GNUNET_JSON_Specification spec[] = {
GNUNET_JSON_spec_string ("slug",
(const char **) &details.slug),
GNUNET_JSON_spec_string ("name",
(const char **) &details.name),
GNUNET_JSON_spec_string ("description",
(const char **) &details.description),
GNUNET_JSON_spec_mark_optional (
GNUNET_JSON_spec_json ("description_i18n",
&details.description_i18n),
NULL),
GNUNET_JSON_spec_string ("kind", &kind),
GNUNET_JSON_spec_mark_optional (
GNUNET_JSON_spec_timestamp ("valid_after",
&details.valid_after),
&no_valid_after),
GNUNET_JSON_spec_timestamp ("valid_before",
&details.valid_before),
GNUNET_JSON_spec_relative_time ("duration",
&details.duration),
GNUNET_JSON_spec_end ()
};
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;
}
}
struct GNUNET_TIME_Timestamp now = GNUNET_TIME_timestamp_get ();
if (no_valid_after) {
details.valid_after = now;
}
/* Ensure that valid_after is before valid_before */
if (GNUNET_TIME_timestamp_cmp (details.valid_after, >=, details.valid_before))
{
GNUNET_break (0);
GNUNET_JSON_parse_free (spec);
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_BAD_REQUEST,
TALER_EC_GENERIC_PARAMETER_MALFORMED,
"valid_before");
}
/* Ensure that valid_after is not in the past */
if (GNUNET_TIME_timestamp_cmp (details.valid_after, <, now))
{
GNUNET_break (0);
GNUNET_JSON_parse_free (spec);
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_BAD_REQUEST,
TALER_EC_GENERIC_PARAMETER_MALFORMED,
"valid_after");
}
if (strcmp (kind, "discount") == 0)
details.kind = TALER_MERCHANTDB_TFK_Discount;
else if (strcmp (kind, "subscription") == 0)
details.kind = TALER_MERCHANTDB_TFK_Subscription;
else
{
GNUNET_break (0);
GNUNET_JSON_parse_free (spec);
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_BAD_REQUEST,
TALER_EC_GENERIC_PARAMETER_MALFORMED,
"kind");
}
if (NULL == details.description_i18n)
details.description_i18n = json_object ();
if (! TALER_JSON_check_i18n (details.description_i18n))
{
GNUNET_break_op (0);
GNUNET_JSON_parse_free (spec);
return TALER_MHD_reply_with_error (connection,
MHD_HTTP_BAD_REQUEST,
TALER_EC_GENERIC_PARAMETER_MALFORMED,
"description_i18n");
}
/* finally, interact with DB until no serialization error */
for (unsigned int i = 0; i<MAX_RETRIES; i++)
{
/* Test if a token family of this id is known */
struct TALER_MERCHANTDB_TokenFamilyDetails existing;
if (GNUNET_OK !=
TMH_db->start (TMH_db->cls,
"/post tokenfamilies"))
{
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->lookup_token_family (TMH_db->cls,
mi->settings.id,
details.slug,
&existing);
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 existing == details? */
{
bool eq;
eq = token_families_equal (&details,
&existing);
TALER_MERCHANTDB_token_family_details_free (&existing);
TMH_db->rollback (TMH_db->cls);
GNUNET_JSON_parse_free (spec);
return eq
? TALER_MHD_reply_static (connection,
MHD_HTTP_NO_CONTENT,
NULL,
NULL,
0)
: TALER_MHD_reply_with_error (connection,
MHD_HTTP_CONFLICT,
TALER_EC_MERCHANT_POST_TOKEN_FAMILY_CONFLICT,
details.slug);
}
} /* end switch (qs) */
qs = TMH_db->insert_token_family (TMH_db->cls,
mi->settings.id,
details.slug,
&details);
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_static (connection,
MHD_HTTP_NO_CONTENT,
NULL,
NULL,
0);
}
/* end of taler-merchant-httpd_private-post-token-families.c */
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