Package =TWiki::Users::TWikiUserMapping

User mapping is the process by which TWiki maps from a username (a login name) to a wikiname and back. It is also where groups are maintained.

By default TWiki maintains user topics and group topics in the Main that define users and group. These topics are

• TWikiUsers - stores a mapping from usernames to TWiki names
• WikiName - for each user, stores info about the user
• GroupNameGroup - for each group, a topic ending with "Group" stores a list of users who are part of that group.

Many sites will want to override this behaviour, for example to get users and groups from a corporate database.

This class implements the basic TWiki behaviour using topics to store users, but is also designed to be subclassed so that other services can be used.

Subclasses should be named 'XxxxUserMapping' so that configure can find them.

All methods in this class should be implemented by subclasses.

ClassMethod new ($session) -> $object

Constructs a new user mapping handler of this type, referring to $session for any required TWiki services.

ObjectMethod *finish

1. breaking circular references to allow garbage collection in persistent environments

ObjectMethod *getListOfGroups () -> @listOfUserObjects

Get a list of groups defined by the mapping manager. By default, TWiki defines groups using topics in the Main web. Subclasses should override this to list groups from their own databases.

Returns a list of TWiki::User objects, one per group.

ObjectMethod *addUserToMapping ($user,$addingUser) -> $topicName

Add a user to the persistant mapping that maps from usernames to wikinames and vice-versa. The default implementation uses a special topic called "TWikiUsers" in the users web. Subclasses will provide other implementations (usually stubs if they have other ways of mapping usernames to wikinames).

Group names must be acceptable to $TWiki::cfg{NameFilter}

$user is the user being added. $addingUser is the user doing the adding.

ObjectMethod *lookupLoginName ($username) -> $wikiName

Map a username to the corresponding wikiname. This is used for lookups during user resolution, and should be as fast as possible.

Objectmethod lookupWikiName($wikiname) -> $username

Map a wikiname to the corresponding username. This is used for lookups during user resolution, and should be as fast as possible.

ObjectMethod *getListOfAllWikiNames () -> @wikinames

Returns a list of all wikinames of users known to the mapping manager.

ObjectMethod groupMembers ($group) -> @members

Return a list of user objects that are members of this group. Should only be called on groups.

Note that groups may be defined recursively, so a group may contain other groups. This method should only return users i.e. all contained groups should be fully expanded.

ObjectMethod isGroup ($user) -> boolean

Establish if a user object refers to a user group or not.

The default implementation is to check if the wikiname of the user ends with 'Group'. Subclasses may override this behaviour to provide alternative interpretations. The $TWiki::cfg{SuperAdminGroup} is recognized as a group no matter what it's name is.