From 26d5adb7e9ea120b356f40b444f410973c8a83d4 Mon Sep 17 00:00:00 2001
From: Jonathan Buchanan <jonathan.russ.buchanan@gmail.com>
Date: Wed, 10 Jun 2020 01:44:32 -0400
Subject: implementation of GET /private/tips

---
 .../taler-merchant-httpd_private-get-tips.c        | 182 +++++++++++++++++++++
 1 file changed, 182 insertions(+)

(limited to 'src/backend/taler-merchant-httpd_private-get-tips.c')

diff --git a/src/backend/taler-merchant-httpd_private-get-tips.c b/src/backend/taler-merchant-httpd_private-get-tips.c
index f874f5b5..a98bd110 100644
--- a/src/backend/taler-merchant-httpd_private-get-tips.c
+++ b/src/backend/taler-merchant-httpd_private-get-tips.c
@@ -18,3 +18,185 @@
  * @brief implementation of a GET /private/tips handler
  * @author Jonathan Buchanan
  */
+#include "platform.h"
+#include "taler-merchant-httpd_private-get-tips.h"
+
+
+/**
+ * Add tip details to our JSON array.
+ *
+ * @param[in,out] cls a `json_t *` JSON array to build
+ * @param row_id row number of the tip
+ * @param tip_id ID of the tip
+ * @param amount the amount of the tip
+ */
+static void
+add_tip (void *cls,
+         uint64_t row_id,
+         struct GNUNET_HashCode tip_id,
+         struct TALER_Amount amount)
+{
+  json_t *pa = cls;
+
+  GNUNET_assert (0 ==
+                 json_array_append_new (
+                   pa,
+                   json_pack (
+                     "{s:I, s:o, s:o}",
+                     "row_id",
+                     row_id,
+                     "tip_id",
+                     GNUNET_JSON_from_data_auto (&tip_id),
+                     "amount",
+                     TALER_JSON_from_amount (&amount))));
+}
+
+
+/**
+ * Convert query argument to @a yna value.
+ *
+ * @param connection connection to take query argument from
+ * @param arg argument to try for
+ * @param[out] value to set
+ * @return true on success, false if the parameter was malformed
+ */
+static bool
+arg_to_yna (struct MHD_Connection *connection,
+            const char *arg,
+            enum TALER_MERCHANTDB_YesNoAll *yna)
+{
+  const char *str;
+
+  str = MHD_lookup_connection_value (connection,
+                                     MHD_GET_ARGUMENT_KIND,
+                                     arg);
+  if (NULL == str)
+  {
+    *yna = TALER_MERCHANTDB_YNA_NO;
+    return true;
+  }
+  if (0 == strcasecmp (str, "yes"))
+  {
+    *yna = TALER_MERCHANTDB_YNA_YES;
+    return true;
+  }
+  if (0 == strcasecmp (str, "no"))
+  {
+    *yna = TALER_MERCHANTDB_YNA_NO;
+    return true;
+  }
+  if (0 == strcasecmp (str, "all"))
+  {
+    *yna = TALER_MERCHANTDB_YNA_ALL;
+    return true;
+  }
+  return false;
+}
+
+
+/**
+ * Handle a GET "/tips/$ID" request.
+ *
+ * @param rh context of the handler
+ * @param connection the MHD connection to handle
+ * @param[in,out] hc context with further information about the request
+ * @return MHD result code
+ */
+MHD_RESULT
+TMH_private_get_tips (const struct TMH_RequestHandler *rh,
+                      struct MHD_Connection *connection,
+                      struct TMH_HandlerContext *hc)
+{
+  json_t *pa;
+  enum GNUNET_DB_QueryStatus qs;
+  enum TALER_MERCHANTDB_YesNoAll expired;
+  uint64_t offset;
+  int64_t limit;
+
+  if (! (arg_to_yna (connection, /* TODO: put this method in a header somewhere */
+                     "expired",
+                     &expired)) )
+    return TALER_MHD_reply_with_error (connection,
+                                       MHD_HTTP_BAD_REQUEST,
+                                       TALER_EC_PARAMETER_MALFORMED,
+                                       "expired");
+  {
+    const char *offset_str;
+
+    offset_str = MHD_lookup_connection_value (connection,
+                                              MHD_GET_ARGUMENT_KIND,
+                                              "offset");
+    if (NULL == offset_str)
+    {
+      offset = UINT64_MAX;
+    }
+    else
+    {
+      char dummy[2];
+      unsigned long long ull;
+
+      if (1 !=
+          sscanf (offset_str,
+                  "%llu%1s",
+                  &ull,
+                  dummy))
+        return TALER_MHD_reply_with_error (connection,
+                                           MHD_HTTP_BAD_REQUEST,
+                                           TALER_EC_PARAMETER_MALFORMED,
+                                           "date");
+      offset = (uint64_t) ull;
+    }
+  }
+  {
+    const char *limit_str;
+
+    limit_str = MHD_lookup_connection_value (connection,
+                                             MHD_GET_ARGUMENT_KIND,
+                                             "limit");
+    if (NULL == limit_str)
+    {
+      limit = -20;
+    }
+    else
+    {
+      char dummy[2];
+      long long ll;
+
+      if (1 !=
+          sscanf (limit_str,
+                  "%lld%1s",
+                  &ll,
+                  dummy))
+        return TALER_MHD_reply_with_error (connection,
+                                           MHD_HTTP_BAD_REQUEST,
+                                           TALER_EC_PARAMETER_MALFORMED,
+                                           "limit");
+      limit = (uint64_t) ll;
+    }
+  }
+
+  pa = json_array ();
+  GNUNET_assert (NULL != pa);
+  qs = TMH_db->lookup_tips (TMH_db->cls,
+                            hc->instance->settings.id,
+                            expired,
+                            limit,
+                            offset,
+                            &add_tip,
+                            pa);
+
+  if (0 > qs)
+  {
+    GNUNET_break (0);
+    json_decref (pa);
+    return TALER_MHD_reply_with_error (connection,
+                                       MHD_HTTP_INTERNAL_SERVER_ERROR,
+                                       TALER_EC_ORDERS_GET_DB_LOOKUP_ERROR,
+                                       "failed to lookup tips in database");
+  }
+
+  return TALER_MHD_reply_json_pack (connection,
+                                    MHD_HTTP_OK,
+                                    "{s:o}",
+                                    "tips", pa);
+}
-- 
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