[mod] data: implement a simple tracker URL (SQL) database

On demand, the tracker data is loaded directly into the cache, so that the
maintenance of this data via PRs is no longer necessary.

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searxng_extra/update/update_tracker_patterns.py

@@ -1,36 +0,0 @@
-# SPDX-License-Identifier: AGPL-3.0-or-later
-"""Fetch trackers"""
-
-import json
-import httpx
-
-from searx.data import data_dir
-
-DATA_FILE = data_dir / "tracker_patterns.json"
-CLEAR_LIST_URL = "https://raw.githubusercontent.com/ClearURLs/Rules/refs/heads/master/data.min.json"
-
-
-def fetch_clear_url_filters():
-    resp = httpx.get(CLEAR_LIST_URL)
-    if resp.status_code != 200:
-        # pylint: disable=broad-exception-raised
-        raise Exception(f"Error fetching ClearURL filter lists, HTTP code {resp.status_code}")
-
-    providers = resp.json()["providers"]
-    rules = []
-    for rule in providers.values():
-        rules.append(
-            {
-                "urlPattern": rule["urlPattern"].replace("\\\\", "\\"),  # fix javascript regex syntax
-                "exceptions": [exc.replace("\\\\", "\\") for exc in rule["exceptions"]],
-                "trackerParams": rule["rules"],
-            }
-        )
-
-    return rules
-
-
-if __name__ == '__main__':
-    filter_list = fetch_clear_url_filters()
-    with DATA_FILE.open("w", encoding='utf-8') as f:
-        json.dump(filter_list, f, indent=4, sort_keys=True, ensure_ascii=False)