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/*
This file is part of TALER
(C) 2020 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-products.c
* @brief implementing POST /products request handling
* @author Christian Grothoff
*/
#include "platform.h"
#include "taler-merchant-httpd_private-post-products.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
/**
* Check if the two products are identical.
*
* @param p1 product to compare
* @param p2 other product to compare
* @return true if they are 'equal', false if not or of payto_uris is not an array
*/
static bool
products_equal (const struct TALER_MERCHANTDB_ProductDetails *p1,
const struct TALER_MERCHANTDB_ProductDetails *p2)
{
return ( (0 == strcmp (p1->description,
p2->description)) &&
(1 == json_equal (p1->description_i18n,
p2->description_i18n)) &&
(0 == strcmp (p1->unit,
p2->unit)) &&
(GNUNET_OK ==
TALER_amount_cmp_currency (&p1->price,
&p2->price)) &&
(0 == TALER_amount_cmp (&p1->price,
&p2->price)) &&
(1 == json_equal (p1->taxes,
p2->taxes)) &&
(p1->total_stock == p2->total_stock) &&
(p1->total_sold == p2->total_sold) &&
(p1->total_lost == p2->total_lost) &&
(0 == strcmp (p1->image,
p2->image)) &&
(1 == json_equal (p1->address,
p2->address)) &&
(p1->next_restock.abs_value_us ==
p2->next_restock.abs_value_us) );
}
MHD_RESULT
TMH_private_post_products (const struct TMH_RequestHandler *rh,
struct MHD_Connection *connection,
struct TMH_HandlerContext *hc)
{
struct TMH_MerchantInstance *mi = hc->instance;
struct TALER_MERCHANTDB_ProductDetails pd = { 0 };
const char *product_id;
int64_t total_stock;
enum GNUNET_DB_QueryStatus qs;
struct GNUNET_JSON_Specification spec[] = {
GNUNET_JSON_spec_string ("product_id",
&product_id),
GNUNET_JSON_spec_string ("description",
(const char **) &pd.description),
GNUNET_JSON_spec_mark_optional (
GNUNET_JSON_spec_json ("description_i18n",
&pd.description_i18n)),
GNUNET_JSON_spec_string ("unit",
(const char **) &pd.unit),
TALER_JSON_spec_amount ("price",
TMH_currency,
&pd.price),
GNUNET_JSON_spec_mark_optional (
GNUNET_JSON_spec_string ("image",
(const char **) &pd.image)),
GNUNET_JSON_spec_mark_optional (
GNUNET_JSON_spec_json ("taxes",
&pd.taxes)),
GNUNET_JSON_spec_int64 ("total_stock",
&total_stock),
GNUNET_JSON_spec_mark_optional (
GNUNET_JSON_spec_json ("address",
&pd.address)),
GNUNET_JSON_spec_mark_optional (
TALER_JSON_spec_absolute_time ("next_restock",
&pd.next_restock)),
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;
}
}
if (total_stock < -1)
{
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,
"total_stock");
}
if (-1 == total_stock)
pd.total_stock = INT64_MAX;
else
pd.total_stock = (uint64_t) total_stock;
if (NULL == pd.address)
pd.address = json_object ();
if (NULL == pd.description_i18n)
pd.description_i18n = json_object ();
if (NULL == pd.taxes)
pd.taxes = json_array ();
/* check taxes is well-formed */
if (! TMH_taxes_array_valid (pd.taxes))
{
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,
"taxes");
}
if (! TMH_location_object_valid (pd.address))
{
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,
"address");
}
if (! TALER_JSON_check_i18n (pd.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");
}
if (NULL == pd.image)
pd.image = "";
if (! TMH_image_data_url_valid (pd.image))
{
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,
"image");
}
/* finally, interact with DB until no serialization error */
for (unsigned int i = 0; i<MAX_RETRIES; i++)
{
/* Test if an product of this id is known */
struct TALER_MERCHANTDB_ProductDetails epd;
if (GNUNET_OK !=
TMH_db->start (TMH_db->cls,
"/post products"))
{
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_product (TMH_db->cls,
mi->settings.id,
product_id,
&epd);
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 epd == pd? */
{
bool eq;
eq = products_equal (&pd,
&epd);
TALER_MERCHANTDB_product_details_free (&epd);
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_PRIVATE_POST_PRODUCTS_CONFLICT_PRODUCT_EXISTS,
product_id);
}
} /* end switch (qs) */
qs = TMH_db->insert_product (TMH_db->cls,
mi->settings.id,
product_id,
&pd);
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-products.c */
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