---+ Package =TWiki::Access=

A singleton object of this class manages the access control database.


%TOC%

---++ ClassMethod *new* <tt>()</tt>

Construct a new singleton object to manage the permissions
database.



---++ ObjectMethod *permissionsSet* <tt>($web) -> $boolean</tt>

Are there any security restrictions for this Web
(ignoring settings on individual pages).



---++ ObjectMethod *getReason* <tt>() -> $string</tt>

Return a string describing the reason why the last access control failure
occurred.



---++ ObjectMethod *checkAccessPermission* <tt>($action,$user,$text,$topic,$web) -> $boolean</tt>
Check if user is allowed to access topic
	* =$action=  - 'VIEW', 'CHANGE', 'CREATE', etc.
	* =$user=	 - User object
	* =$text=	 - If empty: Read '$theWebName.$theTopicName' to check permissions
	* =$topic=	- Topic name to check, e.g. 'SomeTopic'
	* =$web=	  - Web, e.g. 'Know'
If the check fails, the reason can be recoveered using getReason.


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