4692. Logic to ask for transaction history.

src/exchange-tools/taler-wire.c

@@ -3,17 +3,17 @@
   Copyright (C) 2014-2018 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
+  it under the terms of the GNU General Public License as
-  by the Free Software Foundation; either version 3, or (at your
+  published by the Free Software Foundation; either version 3,
-  option) any later version.
+  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
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-  General Public License for more details.
+  GNU General Public License for more details.
 
-  You should have received a copy of the GNU General Public License
+  You should have received a copy of the GNU General Public
-  along with TALER; see the file COPYING.  If not,
+  License along with TALER; see the file COPYING.  If not,
   see <http://www.gnu.org/licenses/>
 */
 
@@ -30,14 +30,44 @@
 #include <taler/taler_wire_lib.h>
 
 /**
- * Plugin name specified by the user.
+ * If set to GNUNET_YES, then we'll ask the bank for a list
+ * of transactions from the account mentioned in the config
+ * section.
+ */
+int history;
+
+/**
+ * If set to GNUNET_YES, then we'll ask the bank to execute a
+ * wire transfer.
+ */
+int transfer;
+
+/**
+ * Name of the wire plugin to use with the bank.
  */
 char *plugin_name;
 
 /**
  * Global return code.
  */
-unsigned int global_ret;
+unsigned int global_ret = 0;
+
+/**
+ * Base32 encoding of a transaction ID.  When asking the
+ * bank for a transaction history, all the results will
+ * have a transaction ID settled *after* this one.
+ */
+char *since_when;
+
+/**
+ * Which config section has the credentials to access the bank.
+ */
+char *account_section; 
+
+/**
+ * Binary version of the 'since-when' CLI option.
+ */
+void *since_when_bin;
 
 /**
  * Wire plugin handle.
@@ -45,6 +75,95 @@ unsigned int global_ret;
 struct TALER_WIRE_Plugin *plugin_handle;
 
 
+/**
+ * Callback used to process ONE entry in the transaction
+ * history returned by the bank.
+ * @param cls closure
+ * @param ec taler error code
+ * @param dir direction of the transfer
+ * @param row_off identification of the position at
+ *        which we are querying
+ * @param row_off_size number of bytes in @a row_off
+ * @param details details about the wire transfer
+ * @return #GNUNET_OK to continue, #GNUNET_SYSERR to
+ *         abort iteration
+ */
+int
+cb (void *cls,
+    enum TALER_ErrorCode ec,
+    enum TALER_BANK_Direction dir,
+    const void *row_off,
+    size_t row_off_size,
+    const struct TALER_WIRE_TransferDetails *details)
+{
+  char *row_off_enc;
+
+  row_off_enc = GNUNET_STRINGS_data_to_string_alloc (row_off,
+                                                     row_off_size);
+
+  fprintf (stdout,
+           "History of transactions:\n");
+
+  /* Give more details on screen (??) */
+  fprintf (stdout,
+           "%s\n",
+           row_off_enc);
+
+  GNUNET_free (row_off_enc);
+
+  return GNUNET_SYSERR;
+}
+
+/**
+ * Ask the bank to execute a wire transfer.
+ */
+void
+execute_wire_transfer ()
+{}
+
+/**
+ * Ask the bank the list of transactions for the bank account
+ * mentioned in the config section given by the user.
+ */
+void
+execute_history ()
+{
+  size_t bin_len = (strlen (since_when) * 5) / 8;
+
+  if (NULL == since_when)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Missing since-when option\n");
+    global_ret = 1;
+    return;
+  }
+
+  since_when_bin = GNUNET_malloc (bin_len);
+    GNUNET_assert
+      (GNUNET_OK == GNUNET_STRINGS_string_to_data
+        (since_when,
+         strlen (since_when),
+         since_when_bin,
+         bin_len));
+
+  if (NULL == plugin_handle->get_history
+      (plugin_handle->cls,
+       account_section,
+       TALER_BANK_DIRECTION_BOTH,
+       since_when_bin,
+       bin_len,
+       10,
+       cb,
+       NULL));
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Could not request the transaction history.\n");
+    global_ret = 1;
+    return;
+  }
+    
+}
+
 /**
  * Main function that will be run.
  *
@@ -60,11 +179,24 @@ run (void *cls,
      const char *cfgfile,
      const struct GNUNET_CONFIGURATION_Handle *cfg)
 {
-  if (NULL == plugin_name)
+  if (NULL == account_section)
   {
     global_ret = 1;
     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "The PLUGIN command line option is mandatory.\n");
+                "The ACCOUNT-SECTION is mandatory.\n");
+    return;
+  }
+
+  if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string
+      (cfg,
+       account_section,
+       "plugin",
+       &plugin_name))
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Could not find the 'plugin' value under %s\n",
+                account_section);
+    global_ret = 1;
     return;
   }
 
@@ -77,6 +209,11 @@ run (void *cls,
     global_ret = 1;
     return;
   }
+
+  if (GNUNET_YES == history)
+    execute_history ();
+  else
+    execute_wire_transfer ();
 }
 
 /**
@@ -95,11 +232,33 @@ main (int argc,
 {
   struct GNUNET_GETOPT_CommandLineOption options[] = {
 
-    GNUNET_GETOPT_option_string ('p',
+    GNUNET_GETOPT_option_flag ('h',
-                                 "plugin",
+                               "history",
-                                 "PLUGIN",
+                               "Wire plugin to use",
-                                 "Wire plugin to use",
+                               &history),
-                                 &plugin_name),
+
+    GNUNET_GETOPT_option_flag ('t',
+                               "transfer",
+                               "Execute a wire transfer.",
+                               &transfer),
+
+    GNUNET_GETOPT_option_string ('w',
+                                 "since-when",
+                                 "SW",
+                                 "When asking the bank for"
+                                 " transactions history, this"
+                                 " option commands that all the"
+                                 " results should have IDs settled"
+                                 " after SW",
+                                 &since_when),
+
+    GNUNET_GETOPT_option_string ('s',
+                                 "section",
+                                 "ACCOUNT-SECTION",
+                                 "Which config section has the"
+                                 " credentials to access the"
+                                 " bank.\n",
+                                 &account_section),
 
     GNUNET_GETOPT_OPTION_END
   };