68 lines
2.0 KiB
JavaScript
68 lines
2.0 KiB
JavaScript
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export function markdownToHTML(text) {
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// 0) Remove <think>...</think>/<thinking>...</thinking> blocks
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text = text.replace(
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/(^|\n)\s*<think>[\s\S]*?<\/think(?:ing)?>\s*(\n\s*\n)?/gi,
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(_, lead) => (lead ? '\n' : '')
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);
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// 1) Normalize line endings
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let tmp = text.replace(/\r\n/g, '\n').replace(/\r/g, '\n');
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// 2) Extract code blocks and replace with placeholders
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const codeblocks = [];
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const placeholder = idx => `@@CODEBLOCK${idx}@@`;
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tmp = tmp.replace(/```(\w*)\n([\s\S]*?)```/g, (_, lang, code) => {
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codeblocks.push({ lang, code });
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return placeholder(codeblocks.length - 1);
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});
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// 3) HTML-escape special characters
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let escaped = tmp
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.replace(/&/g, "&")
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.replace(/</g, "<")
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.replace(/>/g, ">");
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// 4) Headings
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escaped = escaped
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.replace(/^#### (.+)$/gm, "<h4>$1</h4>")
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.replace(/^### (.+)$/gm, "<h3>$1</h3>")
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.replace(/^## (.+)$/gm, "<h2>$1</h2>")
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.replace(/^# (.+)$/gm, "<h1>$1</h1>");
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// 4.5) Unordered lists
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escaped = escaped.replace(
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/(^|\n)([ \t]*\* .+(?:\n[ \t]*\* .+)*)/g,
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(_, lead, listBlock) => {
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const items = listBlock
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.split(/\n/)
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.map(line => line.replace(/^[ \t]*\*\s+/, '').trim())
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.map(item => `<li>${item}</li>`)
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.join('');
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return `${lead}<ul>${items}</ul>`;
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}
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);
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// 5) Bold, italic, inline code
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let html = escaped
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.replace(/\*\*(.+?)\*\*/g, "<b>$1</b>")
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.replace(/(?<!\*)\*(.+?)\*(?!\*)/g, "<i>$1</i>")
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.replace(/`(.+?)`/g, "<code>$1</code>");
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// 6) Restore code blocks
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html = html.replace(/@@CODEBLOCK(\d+)@@/g, (_, idx) => {
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const { lang, code } = codeblocks[+idx];
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const escapedCode = code.replace(/</g, "<").replace(/>/g, ">");
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return `<pre><code class="language-${lang}">${escapedCode}</code></pre>`;
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});
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// 7) Convert line-breaks to <br>
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html = html.replace(/\n/g, "<br>");
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// 8) Cleanup stray <br> immediately before/after lists
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html = html
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.replace(/<br>\s*(<ul>)/g, "$1")
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.replace(/(<\/ul>)\s*<br>/g, "$1");
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return html;
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}
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