diff options
author | Christian Grothoff <christian@grothoff.org> | 2020-08-19 18:19:00 +0200 |
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committer | Christian Grothoff <christian@grothoff.org> | 2020-08-19 18:19:00 +0200 |
commit | 46dde9368f75013b2383c24d4c8a11763ac8e31e (patch) | |
tree | 7971e4bdd18a951521e4317b1619ecbabbc15a8c /src/json | |
parent | a84c61dd82b17bc42593e5fd358cd0917d195f4f (diff) | |
download | exchange-46dde9368f75013b2383c24d4c8a11763ac8e31e.tar.xz |
implement i18n lookup logic for #6458
Diffstat (limited to 'src/json')
-rw-r--r-- | src/json/Makefile.am | 1 | ||||
-rw-r--r-- | src/json/i18n.c | 95 |
2 files changed, 96 insertions, 0 deletions
diff --git a/src/json/Makefile.am b/src/json/Makefile.am index 2910d0773..d7c569d60 100644 --- a/src/json/Makefile.am +++ b/src/json/Makefile.am @@ -10,6 +10,7 @@ lib_LTLIBRARIES = \ libtalerjson.la libtalerjson_la_SOURCES = \ + i18n.c \ json.c \ json_helper.c \ json_wire.c diff --git a/src/json/i18n.c b/src/json/i18n.c new file mode 100644 index 000000000..b92d63ed1 --- /dev/null +++ b/src/json/i18n.c @@ -0,0 +1,95 @@ +/* + 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 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" + + +/** + * Extract a string from @a object under the field @a field, but respecting + * the Taler i18n rules and the language preferences expressed in @a + * language_pattern. + * + * Basically, the @a object may optionally contain a sub-object + * "${field}_i18n" with a map from IETF BCP 47 language tags to a localized + * version of the string. If this map exists and contains an entry that + * matches the @a language pattern, that object (usually a string) is + * returned. If the @a language_pattern does not match any entry, or if the + * i18n sub-object does not exist, we simply return @a field of @a object + * (also usually a string). + * + * If @a object does not have a member @a field we return NULL (error). + * + * @param object the object to extract internationalized + * content from + * @param language_pattern a language preferences string + * like "fr-CH, fr;q=0.9, en;q=0.8, *;q=0.1", following + * https://tools.ietf.org/html/rfc7231#section-5.3.1 + * @param field name of the field to extract + * @return NULL on error, otherwise the member from + * @a object. Note that the reference counter is + * NOT incremented. + */ +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; +} + + +/* end of i18n.c */ |