From b1d9745545ff528729b53312947ba768c336a1d8 Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Fri, 30 Dec 2022 21:28:19 +0100
Subject: -work on new DB queries

---
 src/exchangedb/pg_select_aml_history.c | 130 ++++++++++++++++++++++++++++++++-
 1 file changed, 128 insertions(+), 2 deletions(-)

(limited to 'src/exchangedb/pg_select_aml_history.c')

diff --git a/src/exchangedb/pg_select_aml_history.c b/src/exchangedb/pg_select_aml_history.c
index 2e3108787..9638df5cd 100644
--- a/src/exchangedb/pg_select_aml_history.c
+++ b/src/exchangedb/pg_select_aml_history.c
@@ -25,6 +25,96 @@
 #include "pg_select_aml_history.h"
 #include "pg_helper.h"
 
+
+/**
+ * Closure for #handle_aml_result.
+ */
+struct AmlHistoryResultContext
+{
+  /**
+   * Function to call on each result.
+   */
+  TALER_EXCHANGEDB_AmlHistoryCallback cb;
+
+  /**
+   * Closure for @e cb.
+   */
+  void *cb_cls;
+
+  /**
+   * Plugin context.
+   */
+  struct PostgresClosure *pg;
+
+  /**
+   * Set to #GNUNET_SYSERR on serious errors.
+   */
+  enum GNUNET_GenericReturnValue status;
+};
+
+
+/**
+ * Function to be called with the results of a SELECT statement
+ * that has returned @a num_results results.  Helper function
+ * for #TEH_PG_select_aml_history().
+ *
+ * @param cls closure of type `struct AmlHistoryResultContext *`
+ * @param result the postgres result
+ * @param num_results the number of results in @a result
+ */
+static void
+handle_aml_result (void *cls,
+                   PGresult *result,
+                   unsigned int num_results)
+{
+  struct AmlHistoryResultContext *ctx = cls;
+  struct PostgresClosure *pg = ctx->pg;
+
+  for (unsigned int i = 0; i<num_results; i++)
+  {
+    struct TALER_Amount new_threshold;
+    uint32_t ns;
+    struct GNUNET_TIME_Absolute decision_time;
+    char *justification;
+    struct TALER_AmlOfficerPublicKeyP decider_pub;
+    struct TALER_AmlOfficerSignatureP decider_sig;
+    struct GNUNET_PQ_ResultSpec rs[] = {
+      TALER_PQ_RESULT_SPEC_AMOUNT ("new_threshold",
+                                   &new_threshold),
+      GNUNET_PQ_result_spec_uint32 ("new_status",
+                                    &ns),
+      GNUNET_PQ_result_spec_absolute_time ("decision_time",
+                                           &decision_time),
+      GNUNET_PQ_result_spec_string ("justification",
+                                    &justification),
+      GNUNET_PQ_result_spec_auto_from_type ("decider_pub",
+                                            &decider_pub),
+      GNUNET_PQ_result_spec_auto_from_type ("decider_sig",
+                                            &decider_sig),
+      GNUNET_PQ_result_spec_end
+    };
+
+    if (GNUNET_OK !=
+        GNUNET_PQ_extract_result (result,
+                                  rs,
+                                  i))
+    {
+      GNUNET_break (0);
+      ctx->status = GNUNET_SYSERR;
+      return;
+    }
+    ctx->cb (ctx->cb_cls,
+             &new_threshold,
+             (enum TALER_AmlDecisionState) ns,
+             decision_time,
+             justification,
+             &decider_pub,
+             &decider_sig);
+    GNUNET_PQ_cleanup_result (rs);
+  }
+}
+
+
 enum GNUNET_DB_QueryStatus
 TEH_PG_select_aml_history (
   void *cls,
@@ -32,6 +122,42 @@ TEH_PG_select_aml_history (
   TALER_EXCHANGEDB_AmlHistoryCallback cb,
   void *cb_cls)
 {
-  GNUNET_break (0); // FIXME: not implemeted!
-  return GNUNET_DB_STATUS_HARD_ERROR;
+  struct PostgresClosure *pg = cls;
+  struct GNUNET_PQ_QueryParam params[] = {
+    GNUNET_PQ_query_param_auto_from_type (h_payto),
+    GNUNET_PQ_query_param_end
+  };
+  struct AmlHistoryResultContext ctx = {
+    .cb = cb,
+    .cb_cls = cb_cls,
+    .pg = pg,
+    .status = GNUNET_OK
+  };
+  enum GNUNET_DB_QueryStatus qs;
+
+  PREPARE (pg,
+           "lookup_aml_history",
+           "SELECT"
+           " aggregation_serial_id"
+           ",deposits.h_contract_terms"
+           ",payto_uri"
+           ",wire_targets.wire_target_h_payto"
+           ",kc.coin_pub"
+           ",deposits.merchant_pub"
+           ",wire_out.execution_date"
+           ",deposits.amount_with_fee_val"
+           ",deposits.amount_with_fee_frac"
+           ",denom.fee_deposit_val"
+           ",denom.fee_deposit_frac"
+           ",denom.denom_pub"
+           " FROM aml_history"
+           " WHERE h_payto=$1;");
+  qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
+                                             "lookup_aml_history",
+                                             params,
+                                             &handle_aml_result,
+                                             &ctx);
+  if (GNUNET_OK != ctx.status)
+    return GNUNET_DB_STATUS_HARD_ERROR;
+  return qs;
 }
-- 
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