api template

1 files changed, 247 insertions, 0 deletions

diff --git a/src/lib/merchant_api_patch_template.c b/src/lib/merchant_api_patch_template.c
new file mode 100644
index 00000000..ba66a94f
--- /dev/null
+++ b/src/lib/merchant_api_patch_template.c
@@ -0,0 +1,247 @@
+/*
+  This file is part of TALER
+  Copyright (C) 2020, 2021 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 merchant_api_patch_template.c
+ * @brief Implementation of the PATCH /template/$ID request
+ *        of the merchant's HTTP API
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include <curl/curl.h>
+#include <jansson.h>
+#include <microhttpd.h> /* just for HTTP status codes */
+#include <gnunet/gnunet_util_lib.h>
+#include "taler_merchant_service.h"
+#include "merchant_api_curl_defaults.h"
+#include <taler/taler_json_lib.h>
+#include <taler/taler_curl_lib.h>
+
+
+/**
+ * Handle for a PATCH /template/$ID operation.
+ */
+struct TALER_MERCHANT_TemplatePatchHandle
+{
+
+  /**
+   * The url for this request.
+   */
+  char *url;
+
+  /**
+   * Handle for the request.
+   */
+  struct GNUNET_CURL_Job *job;
+
+  /**
+   * Function to call with the result.
+   */
+  TALER_MERCHANT_TemplatePatchCallback cb;
+
+  /**
+   * Closure for @a cb.
+   */
+  void *cb_cls;
+
+  /**
+   * Reference to the execution context.
+   */
+  struct GNUNET_CURL_Context *ctx;
+
+  /**
+   * Minor context that holds body and headers.
+   */
+  struct TALER_CURL_PostContext post_ctx;
+
+};
+
+
+/**
+ * Function called when we're done processing the
+ * HTTP PATCH /template/$ID request.
+ *
+ * @param cls the `struct TALER_MERCHANT_TemplatePatchHandle`
+ * @param response_code HTTP response code, 0 on error
+ * @param response response body, NULL if not in JSON
+ */
+static void
+handle_patch_template_finished (void *cls,
+                               long response_code,
+                               const void *response)
+{
+  struct TALER_MERCHANT_TemplatePatchHandle *tph = cls;
+  const json_t *json = response;
+  struct TALER_MERCHANT_HttpResponse hr = {
+    .http_status = (unsigned int) response_code,
+    .reply = json
+  };
+
+  tph->job = NULL;
+  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+              "PATCH /template/$ID completed with response code %u\n",
+              (unsigned int) response_code);
+  switch (response_code)
+  {
+  case 0:
+    hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE;
+    break;
+  case MHD_HTTP_NO_CONTENT:
+    break;
+  case MHD_HTTP_BAD_REQUEST:
+    hr.ec = TALER_JSON_get_error_code (json);
+    hr.hint = TALER_JSON_get_error_hint (json);
+    GNUNET_break_op (0);
+    /* This should never happen, either us
+     * or the merchant is buggy (or API version conflict);
+     * just pass JSON reply to the application */
+    break;
+  case MHD_HTTP_UNAUTHORIZED:
+    hr.ec = TALER_JSON_get_error_code (json);
+    hr.hint = TALER_JSON_get_error_hint (json);
+    /* Nothing really to verify, merchant says we need to authenticate. */
+    break;
+  case MHD_HTTP_FORBIDDEN:
+    hr.ec = TALER_JSON_get_error_code (json);
+    hr.hint = TALER_JSON_get_error_hint (json);
+    /* Nothing really to verify, merchant says we tried to abort the payment
+     * after it was successful. We should pass the JSON reply to the
+     * application */
+    break;
+  case MHD_HTTP_NOT_FOUND:
+    hr.ec = TALER_JSON_get_error_code (json);
+    hr.hint = TALER_JSON_get_error_hint (json);
+    break;
+  case MHD_HTTP_CONFLICT:
+    hr.ec = TALER_JSON_get_error_code (json);
+    hr.hint = TALER_JSON_get_error_hint (json);
+    break;
+  case MHD_HTTP_INTERNAL_SERVER_ERROR:
+    hr.ec = TALER_JSON_get_error_code (json);
+    hr.hint = TALER_JSON_get_error_hint (json);
+    /* Server had an internal issue; we should retry,
+       but this API leaves this to the application */
+    break;
+  default:
+    TALER_MERCHANT_parse_error_details_ (json,
+                                         response_code,
+                                         &hr);
+    /* unexpected response code */
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Unexpected response code %u/%d\n",
+                (unsigned int) response_code,
+                (int) hr.ec);
+    GNUNET_break_op (0);
+    break;
+  }
+  tph->cb (tph->cb_cls,
+           &hr);
+  TALER_MERCHANT_template_patch_cancel (tph);
+}
+
+
+struct TALER_MERCHANT_TemplatePatchHandle *
+TALER_MERCHANT_template_patch (
+  struct GNUNET_CURL_Context *ctx,
+  const char *backend_url,
+  const char *template_id,
+  const char *template_description,
+  const char *image,
+  const json_t *template_contract,
+  TALER_MERCHANT_TemplatePatchCallback cb,
+  void *cb_cls)
+{
+  struct TALER_MERCHANT_TemplatePatchHandle *tph;
+  json_t *req_obj;
+
+  req_obj = GNUNET_JSON_PACK (
+    GNUNET_JSON_pack_string ("template_description",
+                             template_description),
+    GNUNET_JSON_pack_string ("image",
+                             image),
+    GNUNET_JSON_pack_object_incref ("template_contract",
+                                    (json_t *) template_contract));
+  tph = GNUNET_new (struct TALER_MERCHANT_TemplatePatchHandle);
+  tph->ctx = ctx;
+  tph->cb = cb;
+  tph->cb_cls = cb_cls;
+  {
+    char *path;
+
+    GNUNET_asprintf (&path,
+                     "private/template/%s",
+                     template_id);
+    tph->url = TALER_url_join (backend_url,
+                               path,
+                               NULL);
+    GNUNET_free (path);
+  }
+  if (NULL == tph->url)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Could not construct request URL.\n");
+    json_decref (req_obj);
+    GNUNET_free (tph);
+    return NULL;
+  }
+  {
+    CURL *eh;
+
+    eh = TALER_MERCHANT_curl_easy_get_ (tph->url);
+    if (GNUNET_OK !=
+        TALER_curl_easy_post (&tph->post_ctx,
+                              eh,
+                              req_obj))
+    {
+      GNUNET_break (0);
+      curl_easy_cleanup (eh);
+      json_decref (req_obj);
+      GNUNET_free (tph);
+      return NULL;
+    }
+    json_decref (req_obj);
+    GNUNET_assert (CURLE_OK ==
+                   curl_easy_setopt (eh,
+                                     CURLOPT_CUSTOMREQUEST,
+                                     MHD_HTTP_METHOD_PATCH));
+    tph->job = GNUNET_CURL_job_add2 (ctx,
+                                     eh,
+                                     tph->post_ctx.headers,
+                                     &handle_patch_template_finished,
+                                     tph);
+  }
+  return tph;
+}
+
+
+void
+TALER_MERCHANT_template_patch_cancel (
+  struct TALER_MERCHANT_TemplatePatchHandle *tph)
+{
+  if (NULL != tph->job)
+  {
+    GNUNET_CURL_job_cancel (tph->job);
+    tph->job = NULL;
+  }
+  TALER_curl_easy_post_finished (&tph->post_ctx);
+  GNUNET_free (tph->url);
+  GNUNET_free (tph);
+}
+
+
+/* end of merchant_api_patch_template.c */