Add support for substitution in title and certain meta tags.

1 files changed, 16 insertions, 0 deletions

diff --git a/generator/postrenderer.js b/generator/postrenderer.js
index 80991a0..cc29b08 100644
--- a/generator/postrenderer.js
+++ b/generator/postrenderer.js
@@ -148,6 +148,14 @@ function _style_to_header(doc)
 	for (let s of styles)
 		head.appendChild(s);
 }
+function htmlescape(s)
+{
+	return s.replace(/</g, "&lt;")
+		.replace(/>/g, "&gt;")
+		.replace(/&/g, "&amp;")
+		.replace(/"/g, "&quot;")
+		.replace(/'/g, "&#39;");
+}
 async function _render(inf,outf,np,pp)
 {
 	const postcont=fs.readFileSync(inf,'utf8');
@@ -192,6 +200,14 @@ async function _render(inf,outf,np,pp)
 	else
 	trd.getElementById('article').innerHTML=contsplit.join('\n');
 
+	//title and meta description
+	const titlee = trd.querySelector('title');
+	titlee.innerHTML = titlee.innerHTML.replace(
+		/%t/, htmlescape(meta[0].trim())
+	);
+	const metade = trd.querySelector('meta[name="description"]');
+	metade.setAttribute('content', metade.getAttribute('content').replace(/%t/, meta[0].trim()));
+
 	//async images
 	trd.getElementById('article').querySelectorAll('img').forEach(
 		(i)=>{if(!i.getAttribute('decoding'))i.setAttribute('decoding','async');}