Craig's Auth0 integration with Groups

craig-auth0.php

<?php
	_log ('firing craig_Login_Hook()');
	// require_once(ABSPATH . 'wp-includes/pluggable.php' );
	global $currentauth0_user;
	$user_id = get_current_user_id();

	if ($user_id > 0) {

		get_currentauth0userinfo();
		/* grab the Auth0 groups for the current user */
		$auth0Groups = $currentauth0_user->groups;

		/* grab all the WordPress Groups */
		$groups = Groups_Group::get_groups(array ( 'order_by'=>'name') );

    /*
     *  Iterate through the Auth0 based groups
     *  If the group starts with our prefix
     *    If a matching one exists in WordPress's Groups module,
     *      if current user is a member
     *        do nothing
     *      else
     *        add user to group
     *   else
     *     ignore, we're only concerned with groups that exist in WordPress Groups
     *  else
     *     ignore, we're only concerned with groups that start with out prefix (helps prevent accidental conflicts)
     */
    		foreach ($auth0Groups as $auth0Group) {
    			if (substr($auth0Group, 0, 2) == 'CT') {
    				if ( $group = Groups_Group::read_by_name( $auth0Group ) ) {
    					if (Groups_User_Group::read( $user_id , $group->group_id )) {
    						/* user already in group */
    						_log('user in group '.$group->name);
    					} else {
    						/* add user to group */
    						_log('add user to group '.$group->name);
    						Groups_User_Group::create( array( 'user_id' => $user_id, 'group_id' => $group->group_id ) );
    					}
     				} else {
    					/* no matching group */
    					_log('no matching group '.$group->name);
    				}  
    			} else {
    				/* not a prefixed group */
    				_log('not a prefix group '.$group->name);
    			}
    		}

    /*  Removal from WordPress Groups
     *  Iterate through the WordPress Groups
     *  If the group starts with our prefix
     *    Is the current user a member of this group
     *      Is this group in the list of Auth0 groups
     *        Do nothing, they're meant to be in that group
     *      else
     *        Remove the current user from the WordPress group
     *    else
     *      Do nothing, they're already not in the group
     *  else
     *      Do nothing, we don't want to mess with WordPress's "standard" groups
     */
    		foreach ($groups as $groupG) {
    			if (substr($groupG->name, 0, 2) == 'CT') {
    				if (Groups_User_Group::read( $user_id , $groupG->group_id )) {
    					if (in_array($groupG->name, $auth0Groups)) {
    						/* user already in group */
    					} else {
    						/* user should not be in group */
    						Groups_User_Group::delete( $user_id, $groupG->group_id );
    					}
    				} else {
    					/* user isn't in group */				}
    			} else {
    				/* not a prefixed group */
    			}
    		} 
    	}