Write a parser for Facebook

Remote work for a web developer. I need to write a parser for Facebook. Boxed (not tied to programs and updates) and independent Facebook parser for Facebook Groups, then upload information to another account in the group or offer another solution through the API

Step example: 1. Get the User Token and perform all further requests using it.
2. Get the user ID and sparr his information in the news feed to the groups he subscribes to in accordance with the requirements
3. Upload this information about user groups with the entered ID, i.e. Another account in the group.