[mod] more typing

import typing

from typing import Dict, List, Optional, Tuple

from searx.exceptions import SearxParameterException

from searx.query import RawTextQuery, VALID_LANGUAGE_CODE

from searx.engines import categories, engines

# remove duplicate queries.

# FIXME: does not fix "!music !soundcloud", because the categories are 'none' and 'music'

def deduplicate_engineref_list(engineref_list: typing.List[EngineRef]) -> typing.List[EngineRef]:

def deduplicate_engineref_list(engineref_list: List[EngineRef]) -> List[EngineRef]:

    engineref_dict = {q.category + '|' + q.name: q for q in engineref_list}

    return engineref_dict.values()

def validate_engineref_list(engineref_list: typing.List[EngineRef], preferences: Preferences):

    """

    Validate query_engines according to the preferences

def validate_engineref_list(engineref_list: List[EngineRef], preferences: Preferences)\

        -> Tuple[List[EngineRef], List[EngineRef], List[EngineRef]]:

    """Validate query_engines according to the preferences

    Returns:

            list of existing engines with a validated token

            list of unknown engine

            list of engine with invalid token according to the preferences

        List[EngineRef]: list of existing engines with a validated token

        List[EngineRef]: list of unknown engine

        List[EngineRef]: list of engine with invalid token according to the preferences

    """

    valid = []

    unknown = []

    return valid, unknown, no_token

def parse_pageno(form: typing.Dict[str, str]) -> int:

def parse_pageno(form: Dict[str, str]) -> int:

    pageno_param = form.get('pageno', '1')

    if not pageno_param.isdigit() or int(pageno_param) < 1:

        raise SearxParameterException('pageno', pageno_param)

    return int(pageno_param)

def parse_lang(raw_text_query: RawTextQuery, form: typing.Dict[str, str], preferences: Preferences) -> str:

def parse_lang(preferences: Preferences, form: Dict[str, str], raw_text_query: RawTextQuery) -> str:

    # get language

    # set specific language if set on request, query or preferences

    # TODO support search with multible languages

    return query_lang

def parse_safesearch(form: typing.Dict[str, str], preferences: Preferences) -> int:

def parse_safesearch(preferences: Preferences, form: Dict[str, str]) -> int:

    if 'safesearch' in form:

        query_safesearch = form.get('safesearch')

        # first check safesearch

    return query_safesearch

def parse_time_range(form: typing.Dict[str, str]) -> str:

def parse_time_range(form: Dict[str, str]) -> str:

    query_time_range = form.get('time_range')

    # check time_range

    query_time_range = None if query_time_range in ('', 'None') else query_time_range

    return query_time_range

def parse_timeout(raw_text_query: RawTextQuery, form: typing.Dict[str, str]) -> typing.Optional[float]:

def parse_timeout(form: Dict[str, str], raw_text_query: RawTextQuery) -> Optional[float]:

    query_timeout = raw_text_query.timeout_limit

    if query_timeout is None and 'timeout_limit' in form:

        raw_time_limit = form.get('timeout_limit')

                raise SearxParameterException('timeout_limit', raw_time_limit)

def parse_specific(raw_text_query: RawTextQuery):

def parse_specific(raw_text_query: RawTextQuery) -> Tuple[List[EngineRef], List[str]]:

    query_engineref_list = raw_text_query.enginerefs

    additional_categories = set()

    for engineref in raw_text_query.enginerefs:

    return query_engineref_list, query_categories

def parse_category_form(query_categories, name, value):

def parse_category_form(query_categories: List[str], name: str, value: str) -> None:

    if name == 'categories':

        query_categories.extend(categ for categ in map(str.strip, value.split(',')) if categ in categories)

    elif name.startswith('category_'):

            query_categories.remove(category)

def get_selected_categories(form, preferences):

def get_selected_categories(preferences: Preferences, form: Dict[str, str]) -> List[str]:

    selected_categories = []

    if form is not None:

    return selected_categories

def parse_generic(form, preferences, disabled_engines):

def parse_generic(preferences: Preferences, form: Dict[str, str], disabled_engines: List[str])\

        -> Tuple[List[EngineRef], List[str]]:

    query_engineref_list = []

    query_categories = []

                                        for engine in query_engineref_list))

    else:

        if not query_categories:

            query_categories = get_selected_categories(None, preferences)

            query_categories = get_selected_categories(preferences, None)

        # using all engines for that search, which are

        # declared under the specific categories

    return query_engineref_list, query_categories

def get_search_query_from_webapp(preferences: Preferences, form: typing.Dict[str, str])\

        -> typing.Tuple[SearchQuery, RawTextQuery, typing.List[EngineRef], typing.List[EngineRef]]:

def get_search_query_from_webapp(preferences: Preferences, form: Dict[str, str])\

        -> Tuple[SearchQuery, RawTextQuery, List[EngineRef], List[EngineRef]]:

    # no text for the query ?

    if not form.get('q'):

        raise SearxParameterException('q', '')

    # set query

    query = raw_text_query.getQuery()

    query_pageno = parse_pageno(form)

    query_lang = parse_lang(raw_text_query, form, preferences)

    query_safesearch = parse_safesearch(form, preferences)

    query_lang = parse_lang(preferences, form, raw_text_query)

    query_safesearch = parse_safesearch(preferences, form)

    query_time_range = parse_time_range(form)

    query_timeout = parse_timeout(raw_text_query, form)

    query_timeout = parse_timeout(form, raw_text_query)

    external_bang = raw_text_query.external_bang

    if raw_text_query.enginerefs and raw_text_query.specific:

    else:

        # otherwise, using defined categories to

        # calculate which engines should be used

        query_engineref_list, query_categories = parse_generic(form, preferences, disabled_engines)

        query_engineref_list, query_categories = parse_generic(preferences, form, disabled_engines)

    query_engineref_list = deduplicate_engineref_list(query_engineref_list)

    query_engineref_list, query_engineref_list_unknown, query_engineref_list_notoken =\

        request.errors.append(gettext('search error'))

        return render(

            'index.html',

            selected_categories=get_selected_categories(request.form, request.preferences),

            selected_categories=get_selected_categories(request.preferences, request.form),

        )

        if output_format == 'html':

            return render(

                'index.html',

                selected_categories=get_selected_categories(request.form, request.preferences),

                selected_categories=get_selected_categories(request.preferences, request.form),

            )

        else:

            return index_error(output_format, 'No query'), 400

    # end of stats

    return render('preferences.html',

                  selected_categories=get_selected_categories(request.form, request.preferences),

                  selected_categories=get_selected_categories(request.preferences, request.form),

                  all_categories=_get_ordered_categories(),

                  locales=settings['locales'],

                  current_locale=request.preferences.get_value("locale"),