This Lumen based application can export Rocket.chat channels, groups and ims into separated html files.
It has a simple export page, where you can define your rocket chat url and the username-password pair.
It creates separated folders for the channels/groups/ims, creates html files and downloads the attachments.
Clone the repository
git clone https://github.com/terzinnorbert/rocket-html.git
Install php packages
composer install
Start web server
php -S localhost:8080 -t ./public