/*
  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 General Public License as published by the Free Software
  Foundation; either version 3, 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 General Public License for more details.

  You should have received a copy of the GNU General Public License along with
  TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
*/
/**
 * @file merchant/backend/taler-merchant-httpd_templating.h
 * @brief logic to load and complete HTML templates
 * @author Christian Grothoff
 */
#ifndef TALER_MERCHANT_HTTPD_TEMPLATING_H
#define TALER_MERCHANT_HTTPD_TEMPLATING_H

#include <microhttpd.h>

/**
 * Entry in a key-value array we use as the mustach closure.
 */
struct KVC
{
  /**
   * A name, used as the key. NULL for the last entry.
   */
  const char *name;

  /**
   * 0-terminated string value to return for @e name.
   */
  const char *value;
};


/**
 * Load a @a template and substitute using @a kvc, returning
 * the result to the @a connection with the given
 * @a http_status code.
 *
 * @param connection the connection we act upon
 * @param http_status code to use on success
 * @param template basename of the template to load
 * @param taler_uri value for "Taler:" header to set, or NULL
 * @param kvc key value pairs to fill in
 * @return #GNUNET_OK on success (reply queued), #GNUNET_NO if an error was queued,
 *         #GNUNET_SYSERR on failure (to queue an error)
 */
enum GNUNET_GenericReturnValue
TMH_return_from_template (struct MHD_Connection *connection,
                          unsigned int http_status,
                          const char *template,
                          const char *taler_uri,
                          const struct KVC *kvc);

/**
 * Preload templates.
 */
int
TMH_templating_init (void);


#endif