I am writing a plugin that hides the publish box from authors, so that I can have them click on a button in a custom meta box I created, to save their post. (This is not the sole purpose of the plugin, rest, I can't share. But this step is needed to do the rest.)
I want WordPress to save the post to DB as it normally would, when I click on that button.
How do I invoke WordPress' post save action from a custom button?