Simplification of permission system

1 files changed, 3 insertions, 42 deletions

diff --git a/permission.py b/permission.py
index 310cef2..fe93928 100644
--- a/permission.py
+++ b/permission.py
@@ -1,45 +1,6 @@
 # -*- coding: utf-8 -*-
-#TODO : move the globals to a config file (use the config file parser module)
-PERM_LIST=['READ','MODIFY','APPEND'] #just add a string here to define a new permission
-PERMS = len(PERM_LIST)
-MAX = (1<<PERMS)-1
 
-class PermissionError(Exception) :
-    def __init__(self,error_string) :
-        self.error = error_string
-        
-    def __str__(self) :
-        str(self.error)
-
-class Permission :
-    
-    def __init__(self,init) : 
-        if isinstance(init,int) :
-            if (init > MAX) or (init < 0) :
-                raise PermissionError('Permission int not in correct range')
-            result = []
-            for shift in range(PERMS-1,-1,-1) :
-                if init>>shift :
-                    result.append(PERM_LIST[shift])
-                    init = init-(1<<shift)
-            self.perm_list = result
-        elif isinstance(init,list) :
-            if (set(init) <= set(PERM_LIST)) :
-                self.perm_list = init
-            else :
-                raise PermissionError('Undefined permission')
-            
-    def __str__(self) :
-        return str(self.perm_list)
-        
-    def toInt(self) :
-        result = 0
-        for i,perm in enumerate(PERM_LIST) :
-            if perm in self.perm_list :
-                result += 1<<i
-        return result
-        
-if __name__== '__main__' :
-    for i in range(MAX+1) :
-        print i, Permission(i), Permission(i).toInt()
+READ   = 1 << 0
+MODIFY = 1 << 1
+APPEND = 1 << 2
     
\ No newline at end of file