93 lines
2.8 KiB
TypeScript
93 lines
2.8 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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const HTTP_PREFIX = 'http://';
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const HTTPS_PREFIX = 'https://';
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const WORD_CHARS = new Set('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_');
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const ESCAPABLE_CHARS = new Set('[]()\\*_~`@!#$%^&+-={}|:;"\'<>,.?/');
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const URL_TERMINATION_CHARS = new Set(' \t\n\r)\'"');
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function isWordCharacter(char: string): boolean {
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return char.length === 1 && WORD_CHARS.has(char);
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}
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export function isEscapableCharacter(char: string): boolean {
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return char.length === 1 && ESCAPABLE_CHARS.has(char);
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}
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export function isUrlTerminationChar(char: string): boolean {
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return char.length === 1 && URL_TERMINATION_CHARS.has(char);
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}
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export function isWordUnderscore(chars: Array<string>, pos: number): boolean {
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if (chars[pos] !== '_') return false;
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const prevChar = pos > 0 ? chars[pos - 1] : '';
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const nextChar = pos + 1 < chars.length ? chars[pos + 1] : '';
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return isWordCharacter(prevChar) && isWordCharacter(nextChar);
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}
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export function isAlphaNumeric(charCode: number): boolean {
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return (
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(charCode >= 48 && charCode <= 57) || (charCode >= 65 && charCode <= 90) || (charCode >= 97 && charCode <= 122)
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);
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}
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export function isAlphaNumericChar(char: string): boolean {
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return char.length === 1 && isAlphaNumeric(char.charCodeAt(0));
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}
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export function startsWithUrl(text: string): boolean {
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if (text.length < 8) return false;
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if (text.startsWith(HTTP_PREFIX)) {
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const prefixEnd = 7;
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return !text.substring(0, prefixEnd).includes('"') && !text.substring(0, prefixEnd).includes("'");
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}
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if (text.startsWith(HTTPS_PREFIX)) {
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const prefixEnd = 8;
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return !text.substring(0, prefixEnd).includes('"') && !text.substring(0, prefixEnd).includes("'");
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}
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return false;
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}
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export function matchMarker(chars: Array<string>, pos: number, marker: string): boolean {
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if (pos + marker.length > chars.length) return false;
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if (marker.length === 1) {
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return chars[pos] === marker;
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}
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if (marker.length === 2) {
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return chars[pos] === marker[0] && chars[pos + 1] === marker[1];
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}
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for (let i = 0; i < marker.length; i++) {
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if (chars[pos + i] !== marker[i]) return false;
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}
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return true;
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}
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