123 lines
2.7 KiB
TypeScript
123 lines
2.7 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 {NodeType, TimestampStyle} from '@fluxer/markdown_parser/src/types/Enums';
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import type {ParserResult} from '@fluxer/markdown_parser/src/types/Nodes';
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const LESS_THAN = 60;
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const LETTER_T = 116;
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const COLON = 58;
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export function parseTimestamp(text: string): ParserResult | null {
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if (
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text.length < 4 ||
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text.charCodeAt(0) !== LESS_THAN ||
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text.charCodeAt(1) !== LETTER_T ||
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text.charCodeAt(2) !== COLON
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) {
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return null;
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}
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const end = text.indexOf('>');
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if (end === -1) {
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return null;
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}
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const inner = text.slice(3, end);
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const allParts = inner.split(':');
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if (allParts.length > 2) {
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return null;
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}
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const [timestampPart, stylePart] = allParts;
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if (!/^\d+$/.test(timestampPart)) {
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return null;
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}
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const timestamp = Number(timestampPart);
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if (timestamp === 0) {
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return null;
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}
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const timestampMillis = timestamp * 1000;
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if (!Number.isFinite(timestampMillis)) {
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return null;
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}
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if (Number.isNaN(new Date(timestampMillis).getTime())) {
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return null;
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}
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let style: TimestampStyle;
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if (stylePart !== undefined) {
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if (stylePart === '') {
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return null;
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}
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const styleChar = stylePart[0];
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const parsedStyle = getTimestampStyle(styleChar);
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if (!parsedStyle) {
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return null;
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}
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style = parsedStyle;
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} else {
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style = TimestampStyle.ShortDateTime;
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}
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return {
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node: {
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type: NodeType.Timestamp,
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timestamp,
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style,
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},
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advance: end + 1,
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};
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}
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function getTimestampStyle(char: string): TimestampStyle | null {
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switch (char) {
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case 't':
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return TimestampStyle.ShortTime;
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case 'T':
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return TimestampStyle.LongTime;
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case 'd':
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return TimestampStyle.ShortDate;
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case 'D':
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return TimestampStyle.LongDate;
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case 'f':
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return TimestampStyle.ShortDateTime;
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case 'F':
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return TimestampStyle.LongDateTime;
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case 's':
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return TimestampStyle.ShortDateShortTime;
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case 'S':
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return TimestampStyle.ShortDateMediumTime;
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case 'R':
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return TimestampStyle.RelativeTime;
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default:
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return null;
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}
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}
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