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/*
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 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 json/i18n.c
* @brief helper functions for i18n in JSON processing
* @author Christian Grothoff
*/
#include "platform.h"
#include <gnunet/gnunet_util_lib.h>
#include "taler_util.h"
#include "taler_json_lib.h"
const json_t *
TALER_JSON_extract_i18n (const json_t *object,
const char *language_pattern,
const char *field)
{
const json_t *ret;
json_t *i18n;
double quality = -1;
ret = json_object_get (object,
field);
if (NULL == ret)
return NULL; /* field MUST exist in object */
{
char *name;
GNUNET_asprintf (&name,
"%s_i18n",
field);
i18n = json_object_get (object,
name);
GNUNET_free (name);
}
if (NULL == i18n)
return ret;
{
const char *key;
json_t *value;
json_object_foreach (i18n, key, value) {
double q = TALER_language_matches (language_pattern,
key);
if (q > quality)
{
quality = q;
ret = value;
}
}
}
return ret;
}
bool
TALER_JSON_check_i18n (const json_t *i18n)
{
const char *field;
json_t *member;
if (! json_is_object (i18n))
return false;
json_object_foreach ((json_t *) i18n, field, member)
{
if (! json_is_string (member))
return false;
/* Field name must be either of format "en_UK"
or just "en"; we do not care about capitalization;
for syntax, see GNU Gettext manual, including
appendix A for rare language codes. */
switch (strlen (field))
{
case 0:
case 1:
return false;
case 2:
if (! isalpha (field[0]))
return false;
if (! isalpha (field[1]))
return false;
break;
case 3:
case 4:
return false;
case 5:
if (! isalpha (field[0]))
return false;
if (! isalpha (field[1]))
return false;
if ('_' != field[2])
return false;
if (! isalpha (field[3]))
return false;
if (! isalpha (field[4]))
return false;
break;
case 6:
if (! isalpha (field[0]))
return false;
if (! isalpha (field[1]))
return false;
if ('_' != field[2])
return false;
if (! isalpha (field[3]))
return false;
if (! isalpha (field[4]))
return false;
if (! isalpha (field[5]))
return false;
break;
default:
return false;
}
}
return true;
}
/* end of i18n.c */
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