* Add support for a source index offset
Improves the reporting of errors in the importing process by getting the correct offset for the displayed row where the error took place.
* Add the source index offset to the row number
Refs ce6df84b04
This builds on 4fd1ca824f by switching from a two tier approach to permissions (superusers and regular users), to a three tier approach (superusers (developer), second-in-command (clients with manage_users permissions), and regular users). If support for a four tier approach is necessary (Superuser, Franchise Owner, Franchise Business Manager, Franchise Staff as an example), then it can be implemented simply by adding a flag to roles that would prevent anyone except for a superuser from assigning that role.
The specific changes made by this commit is to support users with the manage_users permission (but who are not superusers) to be able to assign roles to other users and improvements to the sanctity of the superuser itself. Non-superusers can no longer see or edit superusers in the backend (that was previously poorly handled as a non-superuser with manage_users could take over a superuser account since they could modify that account willy-nilly), and the is_superuser filter is accordingly removed as well.
This issue has been addressed too early in the process lifecycle. The line number should be incremented later, say in the view layer when the error is displayed. A simple helper to determine what the index increment should do well.
$row + $indexIncrement
This is so we don't have to rebuild the array, which is computationally expensive for large datasets and could be frustrating for a developer expecting untouched index values, or likewise needing to prepare our special format.