fix: #12866 again, more tests

src/activitypub/helpers.js

@@ -313,7 +313,7 @@ Helpers.generateTitle = (html) => {
 
 	// Try the first paragraph-like element
 	const match = html.match(titleRegex);
-	if (match) {
+	if (match && match.index === 0) {
 		title = match[2];
 	}
 
@@ -332,6 +332,8 @@ Helpers.generateTitle = (html) => {
 		.reduce((memo, cur, idx, sentences) => {
 			if (idx % 2) {
 				memo.push(`${sentences[idx - 1]}${cur}`);
+			} else if (idx === sentences.length - 1) {
+				memo.push(cur);
 			}
 
 			return memo;

test/activitypub.js

@@ -133,6 +133,12 @@ describe('ActivityPub integration', () => {
 					// Content after line breaks can be discarded
 					['<p>Intro text<br /><a href=\"https://example.org/\">example.org/</span></a></p><p>more text</p>', 'Intro text'],
 
+					// HTML without outer wrapping element
+					['Lorem ipsum dolor <span>sit amet</span>', 'Lorem ipsum dolor sit amet'],
+
+					// Two sentences with punctuation
+					['Lorem ipsum. Dolor sit amet.', 'Lorem ipsum.'],
+
 					// Additional tests?
 					// ['', ''],
 				]);