Task Visibility

[blueprint]

I would like to know if it is possible (or rather, the steps required) to set the visibility of tasks - either publicly visible tasks (i.e. everyone can see them) or private tasks (only assigned tasks are visible if they are the current user).

So far, I have added an additional field to the "Tasks" entity, this field is called "visibility" and is an enum with "Private" or "Public" options.

I would like to now change the code for both the list view and the Kanban view so that Tasks with private visibility are filtered out (unless current user is the assigned user).

Thanks in advance for any pointers.