From 4ba9ffaaeef83a05964bee764c419d9006a6767d Mon Sep 17 00:00:00 2001
From: priscilla <priscilla.huang@efrei.net>
Date: Mon, 23 Jan 2023 08:25:49 -0500
Subject: backend pending webhook

---
 .../taler-merchant-httpd_post-orders-ID-pay.c      | 56 +++++++++++++++++-----
 1 file changed, 44 insertions(+), 12 deletions(-)

(limited to 'src/backend/taler-merchant-httpd_post-orders-ID-pay.c')

diff --git a/src/backend/taler-merchant-httpd_post-orders-ID-pay.c b/src/backend/taler-merchant-httpd_post-orders-ID-pay.c
index ee748470..162ee97a 100644
--- a/src/backend/taler-merchant-httpd_post-orders-ID-pay.c
+++ b/src/backend/taler-merchant-httpd_post-orders-ID-pay.c
@@ -250,6 +250,11 @@ struct PayContext
    */
   struct MHD_Response *response;
 
+  /**
+   * Our contract (or NULL if not available).
+   */
+  json_t *contract_terms;
+  
   /**
    * Placeholder for #TALER_MHD_parse_post_json() to keep its internal state.
    */
@@ -678,6 +683,11 @@ pay_context_cleanup (void *cls)
     GNUNET_SCHEDULER_cancel (pc->timeout_task);
     pc->timeout_task = NULL;
   }
+  if (NULL != pc->contract_terms)
+  {
+    json_decref (pc->contract_terms);
+    pc->contract_terms = NULL;
+  }
   abort_active_deposits (pc);
   for (unsigned int i = 0; i<pc->coins_cnt; i++)
   {
@@ -1035,7 +1045,7 @@ handle_batch_deposit_ok (struct ExchangeGroup *eg,
   {
     resume_pay_with_error (pc,
                            MHD_HTTP_INTERNAL_SERVER_ERROR,
-                           TALER_EC_GENERIC_DB_SOFT_FAILURE,
+                          TALER_EC_GENERIC_DB_SOFT_FAILURE,
                            "insert_deposit");
     return;
   }
@@ -1871,7 +1881,7 @@ check_payment_sufficient (struct PayContext *pc)
  *
  * @param pc context to trigger notification for
  */
-static void
+static enum GNUNET_DB_QueryStatus
 trigger_payment_notification (struct PayContext *pc)
 {
   {
@@ -1916,6 +1926,9 @@ trigger_payment_notification (struct PayContext *pc)
                           NULL,
                           0);
   }
+  return TMH_trigger_webhook (pc->hc->instance->settings.id,
+                              "pay",
+                              pc->contract_terms);
 }
 
 
@@ -2101,7 +2114,26 @@ execute_pay_transaction (struct PayContext *pc)
                            TMH_OSF_CLAIMED | TMH_OSF_PAID,
                            pc->timestamp,
                            pc->order_serial);
-
+  {
+    enum GNUNET_DB_QueryStatus qs;
+    
+    qs = trigger_payment_notification (pc);
+    if (qs < 0)
+    {
+      TMH_db->rollback (TMH_db->cls);
+      if (GNUNET_DB_STATUS_SOFT_ERROR == qs)
+      {
+        execute_pay_transaction (pc);
+        return;
+      }
+      GNUNET_break (0);
+      resume_pay_with_error (pc,
+                             MHD_HTTP_INTERNAL_SERVER_ERROR,
+                             TALER_EC_GENERIC_DB_STORE_FAILED,
+                             "failed to trigger webhooks");
+      return;
+    }
+  }
   {
     enum GNUNET_DB_QueryStatus qs;
 
@@ -2123,7 +2155,6 @@ execute_pay_transaction (struct PayContext *pc)
                              NULL);
       return;
     }
-    trigger_payment_notification (pc);
   }
   generate_success_response (pc);
 }
@@ -2509,13 +2540,17 @@ check_contract (struct PayContext *pc)
 {
   /* obtain contract terms */
   enum GNUNET_DB_QueryStatus qs;
-  json_t *contract_terms = NULL;
   bool paid = false;
 
+  if (NULL != pc->contract_terms)
+  {
+    json_decref (pc->contract_terms);
+    pc->contract_terms = NULL;
+  }
   qs = TMH_db->lookup_contract_terms (TMH_db->cls,
                                       pc->hc->instance->settings.id,
                                       pc->order_id,
-                                      &contract_terms,
+                                      &pc->contract_terms,
                                       &pc->order_serial,
                                       &paid,
                                       NULL);
@@ -2546,11 +2581,10 @@ check_contract (struct PayContext *pc)
   }
   /* hash contract (needed later) */
   if (GNUNET_OK !=
-      TALER_JSON_contract_hash (contract_terms,
+      TALER_JSON_contract_hash (pc->contract_terms,
                                 &pc->h_contract_terms))
   {
     GNUNET_break (0);
-    json_decref (contract_terms);
     return (MHD_YES ==
             TALER_MHD_reply_with_error (pc->connection,
                                         MHD_HTTP_INTERNAL_SERVER_ERROR,
@@ -2572,12 +2606,11 @@ check_contract (struct PayContext *pc)
               GNUNET_h2s (&pc->h_contract_terms.hash));
 
   /* basic sanity check on the contract */
-  if (NULL == json_object_get (contract_terms,
+  if (NULL == json_object_get (pc->contract_terms,
                                "merchant"))
   {
     /* invalid contract */
     GNUNET_break (0);
-    json_decref (contract_terms);
     return (MHD_YES ==
             TALER_MHD_reply_with_error (pc->connection,
                                         MHD_HTTP_INTERNAL_SERVER_ERROR,
@@ -2626,11 +2659,10 @@ check_contract (struct PayContext *pc)
 
     pc->minimum_age = 0;
     res = TALER_MHD_parse_internal_json_data (pc->connection,
-                                              contract_terms,
+                                              pc->contract_terms,
                                               espec);
     if (NULL != fulfillment_url)
       pc->fulfillment_url = GNUNET_strdup (fulfillment_url);
-    json_decref (contract_terms);
     if (GNUNET_YES != res)
     {
       GNUNET_break (0);
-- 
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