diff options
Diffstat (limited to 'src/backend/taler-merchant-httpd_get-rewards-ID.c')
| -rw-r--r-- | src/backend/taler-merchant-httpd_get-rewards-ID.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/src/backend/taler-merchant-httpd_get-rewards-ID.c b/src/backend/taler-merchant-httpd_get-rewards-ID.c new file mode 100644 index 00000000..31ee2afa --- /dev/null +++ b/src/backend/taler-merchant-httpd_get-rewards-ID.c @@ -0,0 +1,235 @@ +/* + This file is part of TALER + (C) 2014-2021 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_get-rewards-ID.c + * @brief implementation of GET /rewards/$ID + * @author Marcello Stanisci + * @author Christian Grothoff + */ +#include "platform.h" +#include <jansson.h> +#include <taler/taler_signatures.h> +#include <taler/taler_json_lib.h> +#include <taler/taler_templating_lib.h> +#include "taler-merchant-httpd_get-rewards-ID.h" +#include "taler-merchant-httpd_helper.h" +#include "taler-merchant-httpd_mhd.h" +#include "taler-merchant-httpd_qr.h" + + +char * +TMH_make_taler_reward_uri (struct MHD_Connection *con, + const struct TALER_RewardIdentifierP *reward_id, + const char *instance_id) +{ + struct GNUNET_Buffer buf = { 0 }; + + GNUNET_assert (NULL != instance_id); + GNUNET_assert (NULL != reward_id); + if (GNUNET_OK != + TMH_taler_uri_by_connection (con, + "reward", + instance_id, + &buf)) + { + GNUNET_break (0); + return NULL; + } + /* Ensure previous part is slash-terminated */ + GNUNET_buffer_write_path (&buf, + ""); + GNUNET_buffer_write_data_encoded (&buf, + reward_id, + sizeof (*reward_id)); + return GNUNET_buffer_reap_str (&buf); +} + + +char * +TMH_make_reward_status_url (struct MHD_Connection *con, + const struct TALER_RewardIdentifierP *reward_id, + const char *instance_id) +{ + struct GNUNET_Buffer buf; + + GNUNET_assert (NULL != instance_id); + GNUNET_assert (NULL != reward_id); + if (GNUNET_OK != + TMH_base_url_by_connection (con, + instance_id, + &buf)) + { + GNUNET_break (0); + return NULL; + } + GNUNET_buffer_write_path (&buf, + "rewards/"); + GNUNET_buffer_write_data_encoded (&buf, + reward_id, + sizeof (*reward_id)); + return GNUNET_buffer_reap_str (&buf); +} + + +MHD_RESULT +TMH_get_rewards_ID (const struct TMH_RequestHandler *rh, + struct MHD_Connection *connection, + struct TMH_HandlerContext *hc) +{ + struct TALER_RewardIdentifierP reward_id; + enum GNUNET_DB_QueryStatus qs; + struct TALER_Amount total_authorized; + struct TALER_Amount total_picked_up; + struct GNUNET_TIME_Timestamp expiration; + char *exchange_url; + char *next_url; + struct TALER_ReservePrivateKeyP reserve_priv; + + (void) rh; + if (GNUNET_OK != + GNUNET_CRYPTO_hash_from_string (hc->infix, + &reward_id.hash)) + { + /* reward_id has wrong encoding */ + GNUNET_break_op (0); + return TALER_MHD_reply_with_error (connection, + MHD_HTTP_BAD_REQUEST, + TALER_EC_GENERIC_PARAMETER_MALFORMED, + hc->infix); + } + + TMH_db->preflight (TMH_db->cls); + qs = TMH_db->lookup_reward (TMH_db->cls, + hc->instance->settings.id, + &reward_id, + &total_authorized, + &total_picked_up, + &expiration, + &exchange_url, + &next_url, + &reserve_priv); + if (0 > qs) + { + /* single, read-only SQL statements should never cause + serialization problems */ + GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR != qs); + /* Always report on hard error as well to enable diagnostics */ + GNUNET_break (GNUNET_DB_STATUS_HARD_ERROR == qs); + return TALER_MHD_reply_with_error (connection, + MHD_HTTP_INTERNAL_SERVER_ERROR, + TALER_EC_GENERIC_DB_FETCH_FAILED, + NULL); + } + if (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS == qs) + { + GNUNET_log (GNUNET_ERROR_TYPE_INFO, + "Unknown reward id given: `%s'\n", + hc->infix); + return TALER_MHD_reply_with_error (connection, + MHD_HTTP_NOT_FOUND, + TALER_EC_MERCHANT_GENERIC_REWARD_ID_UNKNOWN, + hc->infix); + } + + /* Build response */ + { + struct TALER_Amount remaining; + MHD_RESULT ret; + + GNUNET_break (0 <= + TALER_amount_subtract (&remaining, + &total_authorized, + &total_picked_up)); + if (TMH_MHD_test_html_desired (connection)) + { + char *qr; + char *uri; + char *reward_status_url; + + uri = TMH_make_taler_reward_uri (connection, + &reward_id, + hc->instance->settings.id); + reward_status_url = TMH_make_reward_status_url (connection, + &reward_id, + hc->instance->settings.id); + qr = TMH_create_qrcode (uri); + if (NULL == qr) + { + GNUNET_break (0); + GNUNET_free (uri); + ret = TALER_MHD_reply_with_error (connection, + MHD_HTTP_INTERNAL_SERVER_ERROR, + TALER_EC_GENERIC_ALLOCATION_FAILURE, + "during QR code generation"); + } + else + { + json_t *context; + + context = GNUNET_JSON_PACK ( + TALER_JSON_pack_amount ("remaining_reward", + &remaining), + GNUNET_JSON_pack_string ("taler_reward_uri", + uri), + GNUNET_JSON_pack_string ("next_url", + next_url), + GNUNET_JSON_pack_string ("taler_reward_qrcode_svg", + qr)); + ret = TALER_TEMPLATING_reply (connection, + ( (0 == remaining.value) && + (0 == remaining.fraction) ) + ? MHD_HTTP_GONE + : MHD_HTTP_OK, + ( (0 == remaining.value) && + (0 == remaining.fraction) ) + ? "depleted_reward" + : "offer_reward", + hc->instance->settings.id, + uri, + context); + json_decref (context); + } + GNUNET_free (reward_status_url); + GNUNET_free (uri); + GNUNET_free (qr); + } + else + { + ret = TALER_MHD_REPLY_JSON_PACK ( + connection, + TALER_amount_is_zero (&remaining) + ? MHD_HTTP_GONE + : MHD_HTTP_OK, + GNUNET_JSON_pack_string ("exchange_url", + exchange_url), + GNUNET_JSON_pack_string ("next_url", + next_url), + TALER_JSON_pack_amount ("reward_amount", + &remaining), + // FIXME: tip_amount is for legacy compatibility, to be removed "later" + TALER_JSON_pack_amount ("tip_amount", + &remaining), + GNUNET_JSON_pack_timestamp ("expiration", + expiration)); + } + GNUNET_free (exchange_url); + GNUNET_free (next_url); + return ret; + } +} + + +/* end of taler-merchant-httpd_get-rewards-ID.c */ |