From bf8c5982a2e79f0b5198a0033dd41e9702d093f9 Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Sun, 5 Apr 2020 22:05:38 +0200
Subject: make exchange API more uniform in how information is returned

---
 src/lib/exchange_api_recoup.c | 69 +++++++++++++++++++++++++------------------
 1 file changed, 40 insertions(+), 29 deletions(-)

(limited to 'src/lib/exchange_api_recoup.c')

diff --git a/src/lib/exchange_api_recoup.c b/src/lib/exchange_api_recoup.c
index a3416b5bc..484d27536 100644
--- a/src/lib/exchange_api_recoup.c
+++ b/src/lib/exchange_api_recoup.c
@@ -1,6 +1,6 @@
 /*
   This file is part of TALER
-  Copyright (C) 2017 Taler Systems SA
+  Copyright (C) 2017-2020 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
@@ -112,6 +112,10 @@ process_recoup_response (const struct TALER_EXCHANGE_RecoupHandle *ph,
     GNUNET_JSON_spec_fixed_auto ("old_coin_pub", &old_coin_pub),
     GNUNET_JSON_spec_end ()
   };
+  struct TALER_EXCHANGE_HttpResponse hr = {
+    .reply = json,
+    .http_status = MHD_HTTP_OK
+  };
 
   if (GNUNET_OK !=
       GNUNET_JSON_parse (json,
@@ -127,11 +131,9 @@ process_recoup_response (const struct TALER_EXCHANGE_RecoupHandle *ph,
     return GNUNET_SYSERR;
   }
   ph->cb (ph->cb_cls,
-          MHD_HTTP_OK,
-          TALER_EC_NONE,
+          &hr,
           ph->was_refreshed ? NULL : &reserve_pub,
-          ph->was_refreshed ? &old_coin_pub : NULL,
-          json);
+          ph->was_refreshed ? &old_coin_pub : NULL);
   return GNUNET_OK;
 }
 
@@ -151,23 +153,25 @@ handle_recoup_finished (void *cls,
 {
   struct TALER_EXCHANGE_RecoupHandle *ph = cls;
   const json_t *j = response;
-  enum TALER_ErrorCode ec;
+  struct TALER_EXCHANGE_HttpResponse hr = {
+    .reply = j,
+    .http_status = (unsigned int) response_code
+  };
 
   ph->job = NULL;
   switch (response_code)
   {
   case 0:
-    ec = TALER_EC_INVALID_RESPONSE;
+    hr.ec = TALER_EC_INVALID_RESPONSE;
     break;
   case MHD_HTTP_OK:
-    ec = TALER_EC_NONE;
     if (GNUNET_OK !=
         process_recoup_response (ph,
                                  j))
     {
       GNUNET_break_op (0);
-      ec = TALER_EC_RECOUP_REPLY_MALFORMED;
-      response_code = 0;
+      hr.ec = TALER_EC_RECOUP_REPLY_MALFORMED;
+      hr.http_status = 0;
       break;
     }
     TALER_EXCHANGE_recoup_cancel (ph);
@@ -175,7 +179,8 @@ handle_recoup_finished (void *cls,
   case MHD_HTTP_BAD_REQUEST:
     /* This should never happen, either us or the exchange is buggy
        (or API version conflict); just pass JSON reply to the application */
-    ec = TALER_JSON_get_error_code (j);
+    hr.ec = TALER_JSON_get_error_code (j);
+    hr.hint = TALER_JSON_get_error_hint (j);
     break;
   case MHD_HTTP_CONFLICT:
     {
@@ -195,15 +200,18 @@ handle_recoup_finished (void *cls,
                                               &total))
       {
         GNUNET_break_op (0);
-        response_code = 0;
+        hr.http_status = 0;
+        hr.ec = TALER_EC_RECOUP_REPLY_MALFORMED;
+      }
+      else
+      {
+        hr.ec = TALER_JSON_get_error_code (j);
+        hr.hint = TALER_JSON_get_error_hint (j);
       }
-      ec = TALER_JSON_get_error_code (j);
       ph->cb (ph->cb_cls,
-              response_code,
-              ec,
-              NULL,
+              &hr,
               NULL,
-              j);
+              NULL);
       TALER_EXCHANGE_recoup_cancel (ph);
       return;
     }
@@ -211,39 +219,42 @@ handle_recoup_finished (void *cls,
     /* Nothing really to verify, exchange says one of the signatures is
        invalid; as we checked them, this should never happen, we
        should pass the JSON reply to the application */
-    ec = TALER_JSON_get_error_code (j);
+    hr.ec = TALER_JSON_get_error_code (j);
+    hr.hint = TALER_JSON_get_error_hint (j);
     break;
   case MHD_HTTP_NOT_FOUND:
     /* Nothing really to verify, this should never
        happen, we should pass the JSON reply to the application */
-    ec = TALER_JSON_get_error_code (j);
+    hr.ec = TALER_JSON_get_error_code (j);
+    hr.hint = TALER_JSON_get_error_hint (j);
     break;
   case MHD_HTTP_GONE:
     /* Kind of normal: the money was already sent to the merchant
        (it was too late for the refund). */
-    ec = TALER_JSON_get_error_code (j);
+    hr.ec = TALER_JSON_get_error_code (j);
+    hr.hint = TALER_JSON_get_error_hint (j);
     break;
   case MHD_HTTP_INTERNAL_SERVER_ERROR:
     /* Server had an internal issue; we should retry, but this API
        leaves this to the application */
-    ec = TALER_JSON_get_error_code (j);
+    hr.ec = TALER_JSON_get_error_code (j);
+    hr.hint = TALER_JSON_get_error_hint (j);
     break;
   default:
     /* unexpected response code */
-    ec = TALER_JSON_get_error_code (j);
+    hr.ec = TALER_JSON_get_error_code (j);
+    hr.hint = TALER_JSON_get_error_hint (j);
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "Unexpected response code %u\n",
-                (unsigned int) response_code);
+                "Unexpected response code %u/%d\n",
+                (unsigned int) response_code,
+                (int) hr.ec);
     GNUNET_break (0);
-    response_code = 0;
     break;
   }
   ph->cb (ph->cb_cls,
-          response_code,
-          ec,
-          NULL,
+          &hr,
           NULL,
-          j);
+          NULL);
   TALER_EXCHANGE_recoup_cancel (ph);
 }
 
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