From 74b23809f3e100ad7d63cd746fd5ff3a93b4fdd5 Mon Sep 17 00:00:00 2001
From: Nic Eigel <nic@eigel.ch>
Date: Mon, 24 Jun 2024 00:08:47 +0200
Subject: real-time-auditor

---
 src/auditordb/pg_get_purses.c | 174 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 174 insertions(+)
 create mode 100644 src/auditordb/pg_get_purses.c

(limited to 'src/auditordb/pg_get_purses.c')

diff --git a/src/auditordb/pg_get_purses.c b/src/auditordb/pg_get_purses.c
new file mode 100644
index 000000000..44ef4d91b
--- /dev/null
+++ b/src/auditordb/pg_get_purses.c
@@ -0,0 +1,174 @@
+/*
+   This file is part of TALER
+   Copyright (C) 2024 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/>
+ */
+
+
+#include "platform.h"
+#include "taler_error_codes.h"
+#include "taler_dbevents.h"
+#include "taler_pq_lib.h"
+#include "pg_helper.h"
+
+#include "pg_get_purses.h"
+
+
+struct PursesContext
+{
+
+  /**
+   * Function to call for each bad sig loss.
+   */
+  TALER_AUDITORDB_PursesCallback cb;
+
+  /**
+   * Closure for @e cb
+   */
+  void *cb_cls;
+
+  /**
+   * Plugin context.
+   */
+  struct PostgresClosure *pg;
+
+  /**
+   * Query status to return.
+   */
+  enum GNUNET_DB_QueryStatus qs;
+};
+
+
+/**
+ * Helper function for #TAH_PG_get_purses().
+ * To be called with the results of a SELECT statement
+ * that has returned @a num_results results.
+ *
+ * @param cls closure of type `struct PursesContext *`
+ * @param result the postgres result
+ * @param num_results the number of results in @a result
+ */
+static void
+purses_cb (void *cls,
+           PGresult *result,
+           unsigned int num_results)
+{
+  struct PursesContext *dcc = cls;
+  struct PostgresClosure *pg = dcc->pg;
+
+  for (unsigned int i = 0; i < num_results; i++)
+  {
+
+    struct TALER_AUDITORDB_Purses dc;
+
+    struct GNUNET_PQ_ResultSpec rs[] = {
+
+      GNUNET_PQ_result_spec_int64 ("auditor_purses_rowid",
+                                   &dc.auditor_purses_rowid),
+      GNUNET_PQ_result_spec_auto_from_type ("purse_pub",  &dc.purse_pub),
+      TALER_PQ_RESULT_SPEC_AMOUNT ("balance",  &dc.balance),
+      TALER_PQ_RESULT_SPEC_AMOUNT ("target",  &dc.target),
+      GNUNET_PQ_result_spec_absolute_time ("expiration_date",
+                                           &dc.expiration_date),
+
+
+      GNUNET_PQ_result_spec_end
+    };
+    enum GNUNET_GenericReturnValue rval;
+
+    if (GNUNET_OK !=
+        GNUNET_PQ_extract_result (result,
+                                  rs,
+                                  i))
+    {
+      GNUNET_break (0);
+      dcc->qs = GNUNET_DB_STATUS_HARD_ERROR;
+      return;
+    }
+
+    dcc->qs = i + 1;
+
+    rval = dcc->cb (dcc->cb_cls,
+                    dc.auditor_purses_rowid,
+                    &dc);
+    GNUNET_PQ_cleanup_result (rs);
+    if (GNUNET_OK != rval)
+      break;
+  }
+}
+
+
+enum GNUNET_DB_QueryStatus
+TAH_PG_get_purses (
+  void *cls,
+  int64_t limit,
+  uint64_t offset,
+  bool return_suppressed,             // maybe not needed
+  TALER_AUDITORDB_PursesCallback cb,
+  void *cb_cls)
+{
+
+  uint64_t plimit = (uint64_t) ((limit < 0) ? -limit : limit);
+
+  struct PostgresClosure *pg = cls;
+  struct GNUNET_PQ_QueryParam params[] = {
+    GNUNET_PQ_query_param_uint64 (&offset),
+    GNUNET_PQ_query_param_uint64 (&plimit),
+    GNUNET_PQ_query_param_end
+  };
+  struct PursesContext dcc = {
+    .cb = cb,
+    .cb_cls = cb_cls,
+    .pg = pg
+  };
+  enum GNUNET_DB_QueryStatus qs;
+
+  PREPARE (pg,
+           "auditor_purses_get_desc",
+           "SELECT"
+           " auditor_purses_rowid,"
+           " purse_pub,"
+           " balance,"
+           " target,"
+           " expiration_date"
+           " FROM auditor_purses"
+           " WHERE (row_id < $1)"
+           " ORDER BY row_id DESC"
+           " LIMIT $3"
+           );
+  PREPARE (pg,
+           "auditor_purses_get_asc",
+           "SELECT"
+           " auditor_purses_rowid,"
+           " purse_pub,"
+           " balance,"
+           " target,"
+           " expiration_date"
+           " FROM auditor_purses"
+           " WHERE (row_id > $1)"
+           " ORDER BY row_id ASC"
+           " LIMIT $3"
+           );
+  qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
+                                             (limit > 0)
+                                             ? "auditor_purses_get_asc"
+                                             : "auditor_purses_get_desc",
+                                             params,
+                                             &purses_cb,
+                                             &dcc);
+
+  if (qs > 0)
+    return dcc.qs;
+  GNUNET_break (GNUNET_DB_STATUS_HARD_ERROR != qs);
+  return qs;
+}
-- 
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