publisher: Make the HTML element collector more robust

Fixes #8530

common/text/transform.go

@@ -45,3 +45,25 @@ func RemoveAccentsString(s string) string {
 	accentTransformerPool.Put(t)
 	return s
 }
+
+// Chunk splits s into strings of size.
+func Chunk(s string, size int) []string {
+	if size >= len(s) {
+		return []string{s}
+	}
+	var chunks []string
+	chunk := make([]rune, size)
+	l := 0
+	for _, r := range s {
+		chunk[l] = r
+		l++
+		if l == size {
+			chunks = append(chunks, string(chunk))
+			l = 0
+		}
+	}
+	if l > 0 {
+		chunks = append(chunks, string(chunk[:l]))
+	}
+	return chunks
+}