Add "Auto-detected" as a language.

When the user choose "Auto-detected", the choice remains on the following queries.
The detected language is displayed.

For example "Auto-detected (en)":
* the next query language is going to be auto detected
* for the current query, the detected language is English.

This replace the autodetect_search_language plugin.

1 files changed, 0 insertions, 97 deletions

diff --git a/searx/plugins/autodetect_search_language.py b/searx/plugins/autodetect_search_language.py
deleted file mode 100644
index 026ca9b6f..000000000
--- a/searx/plugins/autodetect_search_language.py
+++ /dev/null
@@ -1,97 +0,0 @@
-# SPDX-License-Identifier: AGPL-3.0-or-later
-# lint: pylint
-"""Plugin to detect the search language from the search query.
-
-The language detection is done by using the fastText_ library (`python
-fasttext`_). fastText_ distributes the `language identification model`_, for
-reference:
-
-- `FastText.zip: Compressing text classification models`_
-- `Bag of Tricks for Efficient Text Classification`_
-
-The `language identification model`_ support the language codes (ISO-639-3)::
-
-   af als am an ar arz as ast av az azb ba bar bcl be bg bh bn bo bpy br bs bxr
-   ca cbk ce ceb ckb co cs cv cy da de diq dsb dty dv el eml en eo es et eu fa
-   fi fr frr fy ga gd gl gn gom gu gv he hi hif hr hsb ht hu hy ia id ie ilo io
-   is it ja jbo jv ka kk km kn ko krc ku kv kw ky la lb lez li lmo lo lrc lt lv
-   mai mg mhr min mk ml mn mr mrj ms mt mwl my myv mzn nah nap nds ne new nl nn
-   no oc or os pa pam pfl pl pms pnb ps pt qu rm ro ru rue sa sah sc scn sco sd
-   sh si sk sl so sq sr su sv sw ta te tg th tk tl tr tt tyv ug uk ur uz vec vep
-   vi vls vo wa war wuu xal xmf yi yo yue zh
-
-The `language identification model`_ is harmonized with the SearXNG's language
-(locale) model.  General conditions of SearXNG's locale model are:
-
-a. SearXNG's locale of a query is passed to the
-   :py:obj:`searx.locales.get_engine_locale` to get a language and/or region
-   code that is used by an engine.
-
-b. SearXNG and most of the engines do not support all the languages from
-   language model and there might be also a discrepancy in the ISO-639-3 and
-   ISO-639-2 handling (:py:obj:`searx.locales.get_engine_locale`).  Further
-   more, in SearXNG the locales like ``zh-TH`` (``zh-CN``) are mapped to
-   ``zh_Hant`` (``zh_Hans``).
-
-Conclusion: This plugin does only auto-detect the languages a user can select in
-the language menu (:py:obj:`supported_langs`).
-
-SearXNG's locale of a query comes from (*highest wins*):
-
-1. The ``Accept-Language`` header from user's HTTP client.
-2. The user select a locale in the preferences.
-3. The user select a locale from the menu in the query form (e.g. ``:zh-TW``)
-4. This plugin is activated in the preferences and the locale (only the language
-   code / none region code) comes from the fastText's language detection.
-
-Conclusion: There is a conflict between the language selected by the user and
-the language from language detection of this plugin.  For example, the user
-explicitly selects the German locale via the search syntax to search for a term
-that is identified as an English term (try ``:de-DE thermomix``, for example).
-
-.. hint::
-
-   To SearXNG maintainers; please take into account: under some circumstances
-   the auto-detection of the language of this plugin could be detrimental to
-   users expectations.  Its not recommended to activate this plugin by
-   default. It should always be the user's decision whether to activate this
-   plugin or not.
-
-.. _fastText: https://fasttext.cc/
-.. _python fasttext: https://pypi.org/project/fasttext/
-.. _language identification model: https://fasttext.cc/docs/en/language-identification.html
-.. _Bag of Tricks for Efficient Text Classification: https://arxiv.org/abs/1607.01759
-.. _`FastText.zip: Compressing text classification models`: https://arxiv.org/abs/1612.03651
-
-"""
-
-from flask_babel import gettext
-import babel
-
-from searx.utils import detect_language
-from searx.languages import language_codes
-
-name = gettext('Autodetect search language')
-description = gettext('Automatically detect the query search language and switch to it.')
-preference_section = 'general'
-default_on = False
-
-supported_langs = set()
-"""Languages supported by most searxng engines (:py:obj:`searx.languages.language_codes`)."""
-
-
-def pre_search(request, search):  # pylint: disable=unused-argument
-    lang = detect_language(search.search_query.query, min_probability=0)
-    if lang in supported_langs:
-        search.search_query.lang = lang
-        try:
-            search.search_query.locale = babel.Locale.parse(lang)
-        except babel.core.UnknownLocaleError:
-            pass
-    return True
-
-
-def init(app, settings):  # pylint: disable=unused-argument
-    for searxng_locale in language_codes:
-        supported_langs.add(searxng_locale[0].split('-')[0])
-    return True