Easy Permission Management System

Heres a sample of a easy ৺permission management system.
The code isn't perfect, but still does its work ;-)

First, the "Permissions" Class


its an static class, so you can ৺access it easy at every time.
First, set up the desired ৺security levels:



If you use the DumpLevels() function like this



You will get this:

Level 1: Read
Level 2: Write
Level 4: Execute

To check if a user has the "needed" permissions, simple call the CheckPermission-Function like that:



If you want to use "more" levels, you simple can use the "ShiftLeft"-Operator to check permissions of (root)levels:



You can also dump the permissions a user with a known level has:



this returns:

Level 3 :
- Read
- Write

Look Behind the Engine:
How it works? Well, as you can see, i'm using bit-operaters here.
Each Base in the Binary-System represents a root-level of the permissions:
1 2 4 8 16 ...

f.e. the level 4 will be 100

You can get unique levels by simple adding the root-levels:

2 + 4 = 6 -> 110

A user having the level 6 will have ৺access to the areas, needing ৺security-level 2 OR 4

The ৺permission check is done by bitwise AND-Operation (comparing MSB to MSB and so on...) :
Checking the needed level 4 (100) and the userlevel 6 (110) will result in "true":

100
110
____
100

100 > 0 so the result will be true.

Checking the needed level 3 (011) and the userlevel 4(100) will result in "false":

011
100
____
000

0 == 0 so the result will be false.