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/*-
* Copyright 2017 Vsevolod Stakhov
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef RSPAMD_LANG_DETECTION_H
#define RSPAMD_LANG_DETECTION_H
#include "config.h"
#include "libserver/cfg_file.h"
#include "libstat/stat_api.h"
#include "libmime/message.h"
struct rspamd_lang_detector;
struct rspamd_language_elt;
struct rspamd_task;
enum rspamd_unicode_scripts {
RSPAMD_UNICODE_LATIN = (1 << 0),
RSPAMD_UNICODE_GREEK = (1 << 1),
RSPAMD_UNICODE_CYRILLIC = (1 << 2),
RSPAMD_UNICODE_HEBREW = (1 << 3),
RSPAMD_UNICODE_CJK = (1 << 4),
RSPAMD_UNICODE_JP = (1 << 5),
RSPAMD_UNICODE_ARABIC = (1 << 6),
RSPAMD_UNICODE_DEVANAGARI = (1 << 7),
RSPAMD_UNICODE_THAI = (1 << 8),
RSPAMD_UNICODE_ARMENIAN = (1 << 9),
RSPAMD_UNICODE_GEORGIAN = (1 << 10),
RSPAMD_UNICODE_GUJARATI = (1 << 11),
RSPAMD_UNICODE_TAMIL = (1 << 12),
RSPAMD_UNICODE_TELUGU = (1 << 13),
RSPAMD_UNICODE_MALAYALAM = (1 << 14),
RSPAMD_UNICODE_SINHALA = (1 << 15),
RSPAMD_UNICODE_HANGUL = (1 << 16),
};
struct rspamd_lang_detector_res {
gdouble prob;
const gchar *lang;
struct rspamd_language_elt *elt;
};
/**
* Create new language detector object using configuration object
* @param cfg
* @return
*/
struct rspamd_lang_detector* rspamd_language_detector_init (struct rspamd_config *cfg);
struct rspamd_lang_detector* rspamd_language_detector_ref (struct rspamd_lang_detector* d);
void rspamd_language_detector_unref (struct rspamd_lang_detector* d);
/**
* Try to detect language of words
* @param d
* @param ucs_tokens
* @param words_len
* @return array of struct rspamd_lang_detector_res sorted by freq descending
*/
gboolean rspamd_language_detector_detect (struct rspamd_task *task,
struct rspamd_lang_detector *d,
struct rspamd_mime_text_part *part);
/**
* Returns TRUE if the specified word is known to be a stop word
* @param d
* @param word
* @param wlen
* @return
*/
gboolean rspamd_language_detector_is_stop_word (struct rspamd_lang_detector *d,
const gchar *word, gsize wlen);
#endif
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