35 lines
1.2 KiB
TypeScript
35 lines
1.2 KiB
TypeScript
function unquote(v: string): string {
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const m = /^(["'])(.*)\1$/.exec(v);
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return m ? (m[2] ?? "") : v;
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}
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/**
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* Lit un en-tête YAML simple (--- … ---) : paires `clé: valeur`, valeurs entre guillemets,
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* et blocs `>` / `|` (lignes indentées jointes par des espaces). Pas de YAML imbriqué.
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*/
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export function parseFrontmatter(raw: string): { data: Record<string, string>; body: string } {
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const text = raw.replace(/\r\n/g, "\n");
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if (!text.startsWith("---\n")) return { data: {}, body: text };
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const end = text.indexOf("\n---", 4);
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if (end === -1) return { data: {}, body: text };
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const lines = text.slice(4, end).split("\n");
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const body = text.slice(end + 4).replace(/^[ \t]*\n?/, "");
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const data: Record<string, string> = {};
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for (let i = 0; i < lines.length; i++) {
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const m = /^([A-Za-z0-9_-]+):\s*(.*)$/.exec(lines[i] ?? "");
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if (!m) continue;
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let value = (m[2] ?? "").trim();
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if (value === "" || /^[>|][+-]?$/.test(value)) {
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const parts: string[] = [];
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while (i + 1 < lines.length && /^\s+\S/.test(lines[i + 1] ?? "")) {
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i++;
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parts.push((lines[i] ?? "").trim());
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}
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value = parts.join(" ");
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}
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data[m[1]!] = unquote(value);
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}
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return { data, body };
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}
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