From 2d5b238beb4661721afddd3c76262837d13ee8c4 Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Sun, 18 Jun 2017 22:48:54 +0200
Subject: rework /reserve/history to address #5010

---
 src/exchange/taler-exchange-httpd_reserve_status.c | 137 +++++++++++++++++++++
 1 file changed, 137 insertions(+)
 create mode 100644 src/exchange/taler-exchange-httpd_reserve_status.c

(limited to 'src/exchange/taler-exchange-httpd_reserve_status.c')

diff --git a/src/exchange/taler-exchange-httpd_reserve_status.c b/src/exchange/taler-exchange-httpd_reserve_status.c
new file mode 100644
index 000000000..e13b8f393
--- /dev/null
+++ b/src/exchange/taler-exchange-httpd_reserve_status.c
@@ -0,0 +1,137 @@
+/*
+  This file is part of TALER
+  Copyright (C) 2014, 2015, 2016 GNUnet e.V.
+
+  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 Affero General Public License for more details.
+
+  You should have received a copy of the GNU Affero General Public License along with
+  TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file taler-exchange-httpd_reserve_status.c
+ * @brief Handle /reserve/status requests
+ * @author Florian Dold
+ * @author Benedikt Mueller
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include <gnunet/gnunet_util_lib.h>
+#include <jansson.h>
+#include "taler-exchange-httpd_reserve_status.h"
+#include "taler-exchange-httpd_parsing.h"
+#include "taler-exchange-httpd_responses.h"
+#include "taler-exchange-httpd_keystate.h"
+
+
+/**
+ * Closure for #reserve_status_transaction.
+ */
+struct ReserveStatusContext
+{
+  /**
+   * Public key of the reserve the inquiry is about.
+   */
+  struct TALER_ReservePublicKeyP reserve_pub;
+
+  /**
+   * History of the reserve, set in the callback.
+   */
+  struct TALER_EXCHANGEDB_ReserveHistory *rh;
+
+};
+
+
+/**
+ * Function implementing /reserve/status transaction.  
+ * Execute a /reserve/status.  Given the public key of a reserve,
+ * return the associated transaction history.  Runs the
+ * transaction logic; IF it returns a non-error code, the transaction
+ * logic MUST NOT queue a MHD response.  IF it returns an hard error,
+ * the transaction logic MUST queue a MHD response and set @a mhd_ret.
+ * IF it returns the soft error code, the function MAY be called again
+ * to retry and MUST not queue a MHD response.
+ *
+ * @param cls a `struct ReserveStatusContext *`
+ * @param connection MHD request which triggered the transaction
+ * @param session database session to use
+ * @param[out] mhd_ret set to MHD response status for @a connection,
+ *             if transaction failed (!)
+ * @return transaction status
+ */
+static enum GNUNET_DB_QueryStatus
+reserve_status_transaction (void *cls,
+			    struct MHD_Connection *connection,
+			    struct TALER_EXCHANGEDB_Session *session,
+			    int *mhd_ret)
+{
+  struct ReserveStatusContext *rsc = cls;
+
+  return TEH_plugin->get_reserve_history (TEH_plugin->cls,
+					  session,
+					  &rsc->reserve_pub,
+					  &rsc->rh);
+}
+
+
+/**
+ * Handle a "/reserve/status" request.  Parses the
+ * given "reserve_pub" argument (which should contain the
+ * EdDSA public key of a reserve) and then respond with the
+ * status of the reserve.
+ *
+ * @param rh context of the handler
+ * @param connection the MHD connection to handle
+ * @param[in,out] connection_cls the connection's closure (can be updated)
+ * @param upload_data upload data
+ * @param[in,out] upload_data_size number of bytes (left) in @a upload_data
+ * @return MHD result code
+ */
+int
+TEH_RESERVE_handler_reserve_status (struct TEH_RequestHandler *rh,
+                                    struct MHD_Connection *connection,
+                                    void **connection_cls,
+                                    const char *upload_data,
+                                    size_t *upload_data_size)
+{
+  struct ReserveStatusContext rsc;
+  int res;
+  int mhd_ret;
+
+  res = TEH_PARSE_mhd_request_arg_data (connection,
+                                        "reserve_pub",
+                                        &rsc.reserve_pub,
+                                        sizeof (struct TALER_ReservePublicKeyP));
+  if (GNUNET_SYSERR == res)
+    return MHD_NO; /* internal error */
+  if (GNUNET_NO == res)
+    return MHD_YES; /* parse error */
+  rsc.rh = NULL;
+  if (GNUNET_OK !=
+      TEH_DB_run_transaction (connection,
+			      &mhd_ret,
+			      &reserve_status_transaction,
+			      &rsc))
+    return mhd_ret;
+
+  /* generate proper response */
+  if (NULL == rsc.rh)
+    return TEH_RESPONSE_reply_json_pack (connection,
+                                         MHD_HTTP_NOT_FOUND,
+                                         "{s:s, s:s}",
+                                         "error", "Reserve not found",
+                                         "parameter", "withdraw_pub");
+  mhd_ret = TEH_RESPONSE_reply_reserve_status_success (connection,
+						       rsc.rh);
+  TEH_plugin->free_reserve_history (TEH_plugin->cls,
+                                    rsc.rh);
+  return mhd_ret;
+}
+
+
+/* end of taler-exchange-httpd_reserve_status.c */
-- 
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