Added $viewfullnames property to the user_selector_base class so anyone using a child class of this class can
let it know if user has viewfullnames capability or not.

Also tidied up the functions by removing unused parameters.

Adrian Greeve authored Apr 24, 2013 and Damyon Wiese committed Jul 09, 2013

Add support for additional name fields and flexible formating of
user names.

This function used to be in the user selector, but it is useful in
other areas where we want to search for users as it handles a number
of search options (including extra fields, etc.) and returns SQL
which can be included in a joined query.

A unit test has been added to check the results of these searches.

Since the previous commit to this issue removes the built-in debugging
tests, I've added these back using the M.core libraries.

course, cohort, enrol, role, groups and forum used to use hard-coded
MAX_USERS_PER_PAGE=100 for rendering user list. This has been converted
to $CFG->maxusersperpage.

The this-> keyword was missing from the $exclude = array() statement.

This commit coverts everything in the codebase to use the new
users_order_by_sql function when sorting lists of users. More details in
the bug.

Note that this does not change places where users are displayed in a
sortable table, and the sort order comes from the table.

when function find_users was supposed to be used for user validation but no userids were passed to it, it retrieved all users in the system.
This caused memory overflow on systems with too many users (like moodle.org).
Now we make sure that find_users is not called for validation if there is nobody to validate.

Also improved query inside find_users to make it work faster

when function find_users was supposed to be used for user validation but no userids were passed to it, it retrieved all users in the system.
This caused memory overflow on systems with too many users (like moodle.org).
Now we make sure that find_users is not called for validation if there is nobody to validate.

Also improved query inside find_users to make it work faster

This change:
- Renames the existing setting 'extrauserselectorfields' to 'showuseridentity'
  in preparation for using it in more places. (Upgrade change, new version.)
- Adds a new capability moodle/site:viewuseridentity, now required in order
  to see the extra fields; if you don't have the capability, you don't see them
- Slightly improves the display of extra fields in user selector list; it used
  to be like 'sam marshall, 01234567, email@address' and is now
  'sam marshall [01234567, email@address]' ie the fields are in square
  brackets
- Turns feature on for the group selector - the feature was enabled for other
  user selectors but not for the group selector. Tim did the disable code, he
  thinks this may be to do with more people having access to group selector -
  probably not a problem now it is controlled by capability.

MDL-29233 revert the optional_param workaround and use this->multiselect to decide when we expect arrays

MDL-23927 do not use = 'guest' because we have CFG->siteguest AND it matches any other username with accents and different case in MySQL

webservice MDL-23471 fix XHTML strict issues + two XHTML strict issues related to the user selector form element and the admin_settings_heading class

group-javascript MDL-22935 Fixed problematic conversion to Moodle 2 JS methods, Thanks Paul for the patch

MDL-21782 reworked enrolment framework, the core infrastructure is in place, the basic plugins are all implemented; see the tracker issue for list of unfinished bits, expect more changes and improvements during the next week

AMOS START
    MOV [sendcoursewelcomemessage,core_admin],[sendcoursewelcomemessage,enrol_self]
    MOV [configsendcoursewelcomemessage,core_admin],[sendcoursewelcomemessage_desc,enrol_self]
    MOV [enrolstartdate,core],[enrolstartdate,enrol_self]
    MOV [enrolenddate,core],[enrolenddate,enrol_self]
    CPY [welcometocourse,core],[welcometocourse,enrol_self]
    CPY [welcometocoursetext,core],[welcometocoursetext,enrol_self]
    MOV [notenrollable,core],[notenrollable,core_enrol]
    MOV [enrolenddaterror,core],[enrolenddaterror,enrol_self]
    MOV [enrolmentkeyhint,core],[passwordinvalidhint,enrol_self]
    MOV [coursemanager,core_admin],[coursecontact,core_admin]
    MOV [configcoursemanager,core_admin],[coursecontact_desc,core_admin]
    MOV [enrolledincourserole,core],[enrolledincourserole,enrol_manual]
    MOV [enrolme,core],[enrolme,core_enrol]
    MOV [unenrol,core],[unenrol,core_enrol]
    MOV [unenrolme,core],[unenrolme,core_enrol]
    MOV [enrolmentnew,core],[enrolmentnew,core_enrol]
    MOV [enrolmentnewuser,core],[enrolmentnewuser,core_enrol]
    MOV [enrolments,core],[enrolments,core_enrol]
    MOV [enrolperiod,core],[enrolperiod,core_enrol]
    MOV [unenrolroleusers,core],[unenrolroleusers,core_enrol]
AMOS END

MDL-21655 big scary enrolment and roles improvements - see tacker for list of changes, includes other minor fixes too

 *  YUI3 used instead of YUI2, converted all YUI2 components to YUI3 equivalents.
 * Renamed user/selector/script.js to module.js
 * Converted uses of the the user selector to YUI3 + the new events