|
# SPDX-License-Identifier: AGPL-3.0-or-later
|
|
|
|
from searx.data import EXTERNAL_BANGS
|
|
|
|
|
|
def get_node(external_bangs_db, bang):
|
|
node = external_bangs_db['trie']
|
|
after = ''
|
|
before = ''
|
|
for bang_letter in bang:
|
|
after += bang_letter
|
|
if after in node and isinstance(node, dict):
|
|
node = node[after]
|
|
before += after
|
|
after = ''
|
|
return node, before, after
|
|
|
|
|
|
def get_bang_definition_and_ac(external_bangs_db, bang):
|
|
node, before, after = get_node(external_bangs_db, bang)
|
|
|
|
bang_definition = None
|
|
bang_ac_list = []
|
|
if after != '':
|
|
for k in node:
|
|
if k.startswith(after):
|
|
bang_ac_list.append(before + k)
|
|
elif isinstance(node, dict):
|
|
bang_definition = node.get('*')
|
|
bang_ac_list = [before + k for k in node.keys() if k != '*']
|
|
elif isinstance(node, str):
|
|
bang_definition = node
|
|
bang_ac_list = []
|
|
|
|
return bang_definition, bang_ac_list
|
|
|
|
|
|
def resolve_bang_definition(bang_definition, query):
|
|
url, rank = bang_definition.split(chr(1))
|
|
url = url.replace(chr(2), query)
|
|
if url.startswith('//'):
|
|
url = 'https:' + url
|
|
rank = int(rank) if len(rank) > 0 else 0
|
|
return (url, rank)
|
|
|
|
|
|
def get_bang_definition_and_autocomplete(bang, external_bangs_db=None):
|
|
global EXTERNAL_BANGS
|
|
if external_bangs_db is None:
|
|
external_bangs_db = EXTERNAL_BANGS
|
|
|
|
bang_definition, bang_ac_list = get_bang_definition_and_ac(external_bangs_db, bang)
|
|
|
|
new_autocomplete = []
|
|
current = [*bang_ac_list]
|
|
done = set()
|
|
while len(current) > 0:
|
|
bang_ac = current.pop(0)
|
|
done.add(bang_ac)
|
|
|
|
current_bang_definition, current_bang_ac_list = get_bang_definition_and_ac(external_bangs_db, bang_ac)
|
|
if current_bang_definition:
|
|
_, order = resolve_bang_definition(current_bang_definition, '')
|
|
new_autocomplete.append((bang_ac, order))
|
|
for new_bang in current_bang_ac_list:
|
|
if new_bang not in done and new_bang not in current:
|
|
current.append(new_bang)
|
|
|
|
new_autocomplete.sort(key=lambda t: (-t[1], t[0]))
|
|
new_autocomplete = list(map(lambda t: t[0], new_autocomplete))
|
|
|
|
return bang_definition, new_autocomplete
|
|
|
|
|
|
def get_bang_url(search_query, external_bangs_db=None):
|
|
"""
|
|
Redirects if the user supplied a correct bang search.
|
|
:param search_query: This is a search_query object which contains preferences and the submitted queries.
|
|
:return: None if the bang was invalid, else a string of the redirect url.
|
|
"""
|
|
global EXTERNAL_BANGS
|
|
if external_bangs_db is None:
|
|
external_bangs_db = EXTERNAL_BANGS
|
|
|
|
if search_query.external_bang:
|
|
bang_definition, _ = get_bang_definition_and_ac(external_bangs_db, search_query.external_bang)
|
|
return resolve_bang_definition(bang_definition, search_query.query)[0] if bang_definition else None
|
|
|
|
return None
|