implement library method for DELETE /orders/ and tests

1 files changed, 188 insertions, 0 deletions

diff --git a/src/lib/merchant_api_delete_order.c b/src/lib/merchant_api_delete_order.c
new file mode 100644
index 00000000..4b08e8ca
--- /dev/null
+++ b/src/lib/merchant_api_delete_order.c
@@ -0,0 +1,188 @@
+/*
+  This file is part of TALER
+  Copyright (C) 2020 Taler Systems SA
+
+  TALER is free software; you can redistribute it and/or modify it under the
+  terms of the GNU Lesser General Public License as published by the Free Software
+  Foundation; either version 2.1, 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 Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License along with
+  TALER; see the file COPYING.LGPL.  If not, see
+  <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file lib/merchant_api_delete_order.c
+ * @brief Implementation of the DELETE /orders/$ORDER_ID request of the merchant's HTTP API
+ * @author Jonathan Buchanan
+ */
+#include "platform.h"
+#include <curl/curl.h>
+#include <jansson.h>
+#include <microhttpd.h> /* just for HTTP status codes */
+#include <gnunet/gnunet_util_lib.h>
+#include <gnunet/gnunet_curl_lib.h>
+#include "taler_merchant_service.h"
+#include <taler/taler_json_lib.h>
+#include <taler/taler_signatures.h>
+
+/**
+ * Handle for a DELETE /orders/$ID operation.
+ */
+struct TALER_MERCHANT_OrderDeleteHandle
+{
+  /**
+   * The url for this request.
+   */
+  char *url;
+
+  /**
+   * Handle for the request.
+   */
+  struct GNUNET_CURL_Job *job;
+
+  /**
+   * Function to call with the result.
+   */
+  TALER_MERCHANT_OrderDeleteCallback cb;
+
+  /**
+   * Closure for @a cb.
+   */
+  void *cb_cls;
+
+  /**
+   * Reference to the execution context.
+   */
+  struct GNUNET_CURL_Context *ctx;
+};
+
+
+/**
+ * Function called when we're done processing the
+ * HTTP DELETE /orders/$ORDER_ID request.
+ *
+ * @param cls the `struct TALER_MERCHANT_OrderDeleteHandle`
+ * @param response_code HTTP response code, 0 on error
+ * @param json response body, NULL if not in JSON
+ */
+static void
+handle_delete_order_finished (void *cls,
+                              long response_code,
+                              const void *response)
+{
+  struct TALER_MERCHANT_OrderDeleteHandle *odh = cls;
+  struct TALER_MERCHANT_HttpResponse hr = {
+    .http_status = (unsigned int) response_code,
+    .reply = NULL,
+  };
+
+  odh->job = NULL;
+  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+              "Got /orders/$ID response with status code %u\n",
+              (unsigned int) response_code);
+  switch (response_code)
+  {
+  case MHD_HTTP_NO_CONTENT:
+    break;
+  case MHD_HTTP_NOT_FOUND:
+    break;
+  case MHD_HTTP_CONFLICT:
+    break;
+  default:
+    /* unexpected response code */
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Unexpected response code %u\n",
+                (unsigned int) response_code);
+    break;
+  }
+  odh->cb (odh->cb_cls,
+           &hr);
+  TALER_MERCHANT_order_delete_cancel (odh);
+}
+
+
+/**
+ * Make a DELETE /orders/$ID request to delete a order from our
+ * inventory.
+ *
+ * @param ctx the context
+ * @param backend_url HTTP base URL for the backend
+ * @param order_id identifier of the order
+ * @param cb function to call with the backend's deletion status
+ * @param cb_cls closure for @a cb
+ * @return the request handle; NULL upon error
+ */
+struct TALER_MERCHANT_OrderDeleteHandle *
+TALER_MERCHANT_order_delete (
+  struct GNUNET_CURL_Context *ctx,
+  const char *backend_url,
+  const char *order_id,
+  TALER_MERCHANT_OrderDeleteCallback cb,
+  void *cb_cls)
+{
+  struct TALER_MERCHANT_OrderDeleteHandle *odh;
+
+  odh = GNUNET_new (struct TALER_MERCHANT_OrderDeleteHandle);
+  odh->ctx = ctx;
+  odh->cb = cb;
+  odh->cb_cls = cb_cls;
+  {
+    char *path;
+
+    GNUNET_asprintf (&path,
+                     "private/orders/%s",
+                     order_id);
+
+    odh->url = TALER_url_join (backend_url,
+                               path,
+                               NULL);
+    GNUNET_free (path);
+  }
+  if (NULL == odh->url)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Could not construct request url.\n");
+    GNUNET_free (odh);
+    return NULL;
+  }
+
+  {
+    CURL *eh;
+
+    eh = curl_easy_init ();
+    GNUNET_assert (CURLE_OK ==
+                   curl_easy_setopt (eh,
+                                     CURLOPT_URL,
+                                     odh->url));
+    GNUNET_assert (CURLE_OK ==
+                   curl_easy_setopt (eh,
+                                     CURLOPT_CUSTOMREQUEST,
+                                     MHD_HTTP_METHOD_DELETE));
+    odh->job = GNUNET_CURL_job_add (ctx,
+                                    eh,
+                                    GNUNET_YES,
+                                    &handle_delete_order_finished,
+                                    odh);
+  }
+  return odh;
+}
+
+
+/**
+ * Cancel DELETE /orders/$ID operation.
+ *
+ * @param odh operation to cancel
+ */
+void
+TALER_MERCHANT_order_delete_cancel (
+  struct TALER_MERCHANT_OrderDeleteHandle *odh)
+{
+  if (NULL != odh->job)
+    GNUNET_CURL_job_cancel (odh->job);
+  GNUNET_free (odh->url);
+  GNUNET_free (odh);
+}