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87fc763 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 | /**
* Markdown utilities for Twitch chat
*
* Twitch chat doesn't support markdown formatting, so we strip it before sending.
* Based on OpenClaw's markdownToText in src/agents/tools/web-fetch-utils.ts.
*/
/**
* Strip markdown formatting from text for Twitch compatibility.
*
* Removes images, links, bold, italic, strikethrough, code blocks, inline code,
* headers, and list formatting. Replaces newlines with spaces since Twitch
* is a single-line chat medium.
*
* @param markdown - The markdown text to strip
* @returns Plain text with markdown removed
*/
export function stripMarkdownForTwitch(markdown: string): string {
return (
markdown
// Images
.replace(/!\[[^\]]*]\([^)]+\)/g, "")
// Links
.replace(/\[([^\]]+)]\([^)]+\)/g, "$1")
// Bold (**text**)
.replace(/\*\*([^*]+)\*\*/g, "$1")
// Bold (__text__)
.replace(/__([^_]+)__/g, "$1")
// Italic (*text*)
.replace(/\*([^*]+)\*/g, "$1")
// Italic (_text_)
.replace(/_([^_]+)_/g, "$1")
// Strikethrough (~~text~~)
.replace(/~~([^~]+)~~/g, "$1")
// Code blocks
.replace(/```[\s\S]*?```/g, (block) => block.replace(/```[^\n]*\n?/g, "").replace(/```/g, ""))
// Inline code
.replace(/`([^`]+)`/g, "$1")
// Headers
.replace(/^#{1,6}\s+/gm, "")
// Lists
.replace(/^\s*[-*+]\s+/gm, "")
.replace(/^\s*\d+\.\s+/gm, "")
// Normalize whitespace
.replace(/\r/g, "") // Remove carriage returns
.replace(/[ \t]+\n/g, "\n") // Remove trailing spaces before newlines
.replace(/\n/g, " ") // Replace newlines with spaces (for Twitch)
.replace(/[ \t]{2,}/g, " ") // Reduce multiple spaces to single
.trim()
);
}
/**
* Simple word-boundary chunker for Twitch (500 char limit).
* Strips markdown before chunking to avoid breaking markdown patterns.
*
* @param text - The text to chunk
* @param limit - Maximum characters per chunk (Twitch limit is 500)
* @returns Array of text chunks
*/
export function chunkTextForTwitch(text: string, limit: number): string[] {
// First, strip markdown
const cleaned = stripMarkdownForTwitch(text);
if (!cleaned) {
return [];
}
if (limit <= 0) {
return [cleaned];
}
if (cleaned.length <= limit) {
return [cleaned];
}
const chunks: string[] = [];
let remaining = cleaned;
while (remaining.length > limit) {
// Find the last space before the limit
const window = remaining.slice(0, limit);
const lastSpaceIndex = window.lastIndexOf(" ");
if (lastSpaceIndex === -1) {
// No space found, hard split at limit
chunks.push(window);
remaining = remaining.slice(limit);
} else {
// Split at the last space
chunks.push(window.slice(0, lastSpaceIndex));
remaining = remaining.slice(lastSpaceIndex + 1);
}
}
if (remaining) {
chunks.push(remaining);
}
return chunks;
}
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