78 lines
3.2 KiB
Dart
78 lines
3.2 KiB
Dart
/*
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* Copyright (c) 2024-2026 Fabian Freund.
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*
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* This file is part of WebLibre
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* (see https://weblibre.eu).
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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import 'package:weblibre/utils/uri_input_parser.dart';
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/// Helpers for per-site rule lists keyed by host (e.g. gesture exclusions,
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/// per-site desktop mode). Entries are stored as bare lowercase hosts and match
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/// a page's host exactly or as a parent domain.
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///
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/// Note: this is intentionally distinct from `uri_parser.dart`'s `normalizeHost`
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/// /`hostVariants`, which strip generic `www`/`m`/`mobile` prefixes for fuzzy
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/// bang-template matching — a different semantic that must not be conflated.
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/// Normalises a user-entered site into a bare lowercase host, e.g.
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/// `https://News.example.com/foo` → `news.example.com`. Accepts either a full
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/// URL or a bare host, and validates the result with the same rules the address
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/// bar uses ([isValidHostCandidate]). Returns null for input without a valid
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/// host.
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String? normalizeRuleHost(String input) {
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final trimmed = input.trim().toLowerCase();
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if (trimmed.isEmpty) return null;
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final candidate = trimmed.contains('://') ? trimmed : 'https://$trimmed';
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final host = Uri.tryParse(candidate)?.host;
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if (host == null || host.isEmpty) return null;
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return isValidHostCandidate(host) ? host : null;
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}
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/// Whether [url] is covered by any entry in [patterns]. An entry matches the
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/// URL's host exactly or as a parent domain (so `example.com` also covers
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/// `m.example.com`).
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bool hostMatchesRule(Uri url, List<String> patterns) {
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final host = url.host.toLowerCase();
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if (host.isEmpty) return false;
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for (final entry in patterns) {
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final pattern = entry.toLowerCase();
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if (pattern.isEmpty) continue;
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if (host == pattern || host.endsWith('.$pattern')) return true;
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}
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return false;
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}
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/// Returns an entry in [patterns] that covers [url]'s host as a *parent domain*
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/// (a strict suffix, not an exact match), or null if none does. Used to detect
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/// when a page is governed by a broader rule that a per-site toggle for the
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/// exact host cannot override — e.g. `example.com` covering `m.example.com`.
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/// (If both the exact host and a parent are listed, the parent is still
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/// returned, since removing the exact entry would not clear the page.)
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String? coveringParentRule(Uri url, List<String> patterns) {
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final host = url.host.toLowerCase();
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if (host.isEmpty) return null;
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for (final entry in patterns) {
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final pattern = entry.toLowerCase();
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if (pattern.isEmpty || pattern == host) continue;
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if (host.endsWith('.$pattern')) return pattern;
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}
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return null;
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}
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