1 files changed, 152 insertions, 0 deletions
diff --git a/src/backenddb/pg_lookup_transfer_summary.c b/src/backenddb/pg_lookup_transfer_summary.c
new file mode 100644
index 00000000..b282d3bf
--- /dev/null
+++ b/src/backenddb/pg_lookup_transfer_summary.c
@@ -0,0 +1,152 @@
+/*
+   This file is part of TALER
+   Copyright (C) 2023 Taler Systems SA
+
+   TALER is free software; you can redistribute it and/or modify it under the
+   terms of the GNU 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 backenddb/pg_lookup_transfer_summary.c
+ * @brief Implementation of the lookup_transfer_summary function for Postgres
+ * @author Iván Ávalos
+ */
+#include "platform.h"
+#include <taler/taler_error_codes.h>
+#include <taler/taler_dbevents.h>
+#include <taler/taler_pq_lib.h>
+#include "pg_lookup_transfer_summary.h"
+#include "pg_helper.h"
+
+/**
+ * Closure for #lookup_transfer_summary_cb().
+ */
+struct LookupTransferSummaryContext
+{
+  /**
+   * Function to call for each order that was aggregated.
+   */
+  TALER_MERCHANTDB_TransferSummaryCallback cb;
+
+  /**
+   * Closure for @e cb.
+   */
+  void *cb_cls;
+
+  /**
+   * Plugin context.
+   */
+  struct PostgresClosure *pg;
+
+  /**
+   * Transaction result.
+   */
+  enum GNUNET_DB_QueryStatus qs;
+};
+
+
+/**
+ * Function to be called with the results of a SELECT statement
+ * that has returned @a num_results results.
+ *
+ * @param cls of type `struct LookupTransferSummaryContext *`
+ * @param result the postgres result
+ * @param num_results the number of results in @a result
+ */
+static void
+lookup_transfer_summary_cb (void *cls,
+                            PGresult *result,
+                            unsigned int num_results)
+{
+  struct LookupTransferSummaryContext *ltdc = cls;
+
+  for (unsigned int i = 0; i<num_results; i++)
+  {
+    char *order_id;
+    struct TALER_Amount deposit_value;
+    struct TALER_Amount deposit_fee;
+    struct GNUNET_PQ_ResultSpec rs[] = {
+      GNUNET_PQ_result_spec_string ("order_id",
+                                    &order_id),
+      TALER_PQ_result_spec_amount_with_currency ("exchange_deposit_value",
+                                                 &deposit_value),
+      TALER_PQ_result_spec_amount_with_currency ("exchange_deposit_fee",
+                                                 &deposit_fee),
+      GNUNET_PQ_result_spec_end
+    };
+
+    if (GNUNET_OK !=
+        GNUNET_PQ_extract_result (result,
+                                  rs,
+                                  i))
+    {
+      GNUNET_break (0);
+      ltdc->qs = GNUNET_DB_STATUS_HARD_ERROR;
+      return;
+    }
+    ltdc->cb (ltdc->cb_cls,
+              order_id,
+              &deposit_value,
+              &deposit_fee);
+    GNUNET_PQ_cleanup_result (rs);
+  }
+  ltdc->qs = num_results;
+}
+
+
+enum GNUNET_DB_QueryStatus
+TMH_PG_lookup_transfer_summary (void *cls,
+                                const char *exchange_url,
+                                const struct TALER_WireTransferIdentifierRawP *wtid,
+                                TALER_MERCHANTDB_TransferSummaryCallback cb,
+                                void *cb_cls)
+{
+  struct PostgresClosure *pg = cls;
+  struct GNUNET_PQ_QueryParam params[] = {
+    GNUNET_PQ_query_param_string (exchange_url),
+    GNUNET_PQ_query_param_auto_from_type (wtid),
+    GNUNET_PQ_query_param_end
+  };
+  struct LookupTransferSummaryContext ltdc = {
+    .cb  = cb,
+    .cb_cls = cb_cls,
+    .pg = pg
+  };
+  enum GNUNET_DB_QueryStatus qs;
+
+  check_connection (pg);
+  PREPARE (pg,
+           "lookup_transfer_summary",
+           "SELECT"
+           " mct.order_id"
+           ",mtc.exchange_deposit_value"
+           ",mtc.exchange_deposit_fee"
+           " FROM merchant_transfers mtr"
+           "  JOIN merchant_transfer_to_coin mtc"
+           "    USING (credit_serial)"
+           "  JOIN merchant_deposits dep"
+           "    USING (deposit_serial)"
+           "  JOIN merchant_deposit_confirmations mcon"
+           "    USING (deposit_confirmation_serial)"
+           "  JOIN merchant_contract_terms mct"
+           "    USING (order_serial)"
+           " WHERE mtr.wtid=$2"
+           "   AND mtr.exchange_url=$1");
+
+  qs = GNUNET_PQ_eval_prepared_multi_select (
+    pg->conn,
+    "lookup_transfer_summary",
+    params,
+    &lookup_transfer_summary_cb,
+    &ltdc);
+  if (0 >= qs)
+    return qs;
+  return ltdc.qs;
+}