87 lines
2.2 KiB
TypeScript
87 lines
2.2 KiB
TypeScript
/*
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* Copyright (C) 2026 Fluxer Contributors
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*
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* This file is part of Fluxer.
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*
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* Fluxer 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 published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Fluxer 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 Fluxer. If not, see <https://www.gnu.org/licenses/>.
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*/
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import * as RegexUtils from '~/utils/RegexUtils';
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export interface CodeLinkConfig {
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shortHost: string;
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path: string;
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}
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const patternCache = new Map<string, RegExp>();
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function createPattern(config: CodeLinkConfig): RegExp {
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const cacheKey = `${config.shortHost}:${config.path}`;
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let pattern = patternCache.get(cacheKey);
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if (pattern) {
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return pattern;
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}
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pattern = new RegExp(
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[
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'(?:https?:\\/\\/)?',
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'(?:',
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`${RegexUtils.escapeRegex(config.shortHost)}(?:\\/#)?\\/(?!${config.path}\\/)([a-zA-Z0-9\\-]{2,32})(?![a-zA-Z0-9\\-])`,
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'|',
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`${RegexUtils.escapeRegex(location.host)}(?:\\/#)?\\/${config.path}\\/([a-zA-Z0-9\\-]{2,32})(?![a-zA-Z0-9\\-])`,
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')',
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].join(''),
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'gi',
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);
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patternCache.set(cacheKey, pattern);
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return pattern;
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}
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export function findCodes(content: string | null, config: CodeLinkConfig): Array<string> {
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if (!content) return [];
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const codes: Array<string> = [];
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const seenCodes = new Set<string>();
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const pattern = createPattern(config);
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pattern.lastIndex = 0;
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let match: RegExpExecArray | null;
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while ((match = pattern.exec(content)) !== null && codes.length < 10) {
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const code = match[1] || match[2];
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if (code && !seenCodes.has(code)) {
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seenCodes.add(code);
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codes.push(code);
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}
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}
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return codes;
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}
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export function findCode(content: string | null, config: CodeLinkConfig): string | null {
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if (!content) return null;
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const pattern = createPattern(config);
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pattern.lastIndex = 0;
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const match = pattern.exec(content);
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if (match) {
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return match[1] || match[2];
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}
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return null;
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}
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