function buildListUsers()
{
    //Build the users of the selected list.
    global $debug, $message, $success, $Dbc, $returnThis;
    $output = '';
    try {
        if (empty($_POST['listId'])) {
            throw new Adrlist_CustomException('', '$_POST[\'listId\'] is empty.');
        } elseif (!is_numeric($_POST['listId'])) {
            throw new Adrlist_CustomException('', '$_POST[\'listId\'] is not numeric.');
        }
        //Get the user's list role.
        $listInfo = getListInfo($_SESSION['userId'], $_POST['listId']);
        if ($listInfo === false || $listInfo['listRoleId'] < 3) {
            //The user must be a Manager (3) or higher to view list users.
            throw new Adrlist_CustomException("Your role does not allow you to edit this list.", '');
        }
        //Select the existing users.
        $listUsersCountStmt = "SELECT\n\tCOUNT(users.userId) AS 'count'\nFROM\n\tusers\nJOIN\n\tuserListSettings ON userListSettings.userId = users.userId AND\n\tuserListSettings.listId = ?\nWHERE\n\tusers.userId != ?";
        $listUsersStmt = "SELECT\n\tusers.userId AS 'userId',\n\tCONCAT_WS(' ',users.firstName,users.lastName) AS 'name',\n\tusers.primaryEmail AS 'primaryEmail',\n\tuserListSettings.listRoleId AS 'listRoleId',\n\tuserListSettings.dateAdded AS 'dateAdded'\nFROM\n\tusers\nJOIN\n\tuserListSettings ON userListSettings.userId = users.userId AND\n\tuserListSettings.listId = ?\nWHERE\n\tusers.userId != ?";
        /*GROUP BY
        	users.primaryEmail*/
        $listUsersEndStmt = "\nORDER BY\n\tCONCAT_WS(' ',users.firstName,users.lastName), users.primaryEmail";
        //Select the users with pending invitations.
        $pendingUsersCountStmt = "SELECT\n\tCOUNT(email) AS 'count'\nFROM\n\tinvitations\nWHERE\n\tlistId = ? AND\n\trespondDate IS NULL AND\n\temail NOT IN (SELECT users.primaryEmail FROM users)";
        $pendingUsersStmt = "SELECT\n\tinvitationId AS 'invitationId',\n\temail AS 'email',\n\tlistRoleId AS 'listRoleId',\n\tsentDate AS 'sentDate',\n\tsenderId AS 'senderId'\nFROM\n\tinvitations\nWHERE\n\tlistId = ? AND\n\trespondDate IS NULL AND\n\temail NOT IN (SELECT users.primaryEmail FROM users)";
        $pendingUsersEndStmt = "\nORDER BY\n\temail";
        if (!empty($_POST['searchVal']) && !empty($_POST['searchFor']) && $_POST['searchFor'] == 'listUsers') {
            $searchListUsers = true;
            $searchVal = '%' . trim($_POST['searchVal']) . '%';
            $listUsersSearchQuery = " AND\n\t(users.firstName LIKE ? || users.lastName LIKE ? || users.primaryEmail LIKE ?)";
            $listUsersStmt = $listUsersStmt . $listUsersSearchQuery . $listUsersEndStmt;
            $listUsersParams = array($_POST['listId'], $_SESSION['userId'], $searchVal, $searchVal, $searchVal);
            $listUsersCountStmt .= $listUsersSearchQuery;
        } else {
            $searchListUsers = false;
            $listUsersStmt .= $listUsersEndStmt;
            $listUsersParams = array($_POST['listId'], $_SESSION['userId']);
        }
        if (!empty($_POST['searchVal']) && !empty($_POST['searchFor']) && $_POST['searchFor'] == 'pendingListUsers') {
            $searchPendingListUsers = true;
            $searchVal = '%' . trim($_POST['searchVal']) . '%';
            $pendingUsersSearchQuery = " AND\nemail LIKE ?";
            $pendingUsersStmt = $pendingUsersStmt . $pendingUsersSearchQuery . $pendingUsersEndStmt;
            $pendingUsersParams = array($_POST['listId'], $searchVal);
            $pendingUsersCountStmt .= $pendingUsersSearchQuery;
        } else {
            $searchPendingListUsers = false;
            $pendingUsersStmt = $pendingUsersStmt . $pendingUsersEndStmt;
            $pendingUsersParams = array($_POST['listId']);
        }
        $listUsersCountStmt = $Dbc->prepare($listUsersCountStmt);
        $listUsersCountStmt->execute($listUsersParams);
        $row = $listUsersCountStmt->fetch(PDO::FETCH_ASSOC);
        $itemCount = $row['count'];
        $pagination = new Adrlist_Pagination('buildListUsers', 'listUsers', $itemCount, 'Search Users', $searchListUsers);
        $pagination->addSearchParameters(array('listId' => $_POST['listId'], 'searchFor' => 'listUsers'));
        list($offset, $limit) = $pagination->offsetLimit();
        $listUsersStmt = $Dbc->prepare($listUsersStmt . " LIMIT {$offset}, {$limit}");
        $listUsersStmt->execute($listUsersParams);
        $pendingUsersCountStmt = $Dbc->prepare($pendingUsersCountStmt);
        $pendingUsersCountStmt->execute($pendingUsersParams);
        $row = $pendingUsersCountStmt->fetch(PDO::FETCH_ASSOC);
        $itemCount = $row['count'];
        $pendingPagination = new Adrlist_Pagination('buildListUsers', 'pendingListUsers', $itemCount, 'Search Pending Users', $searchPendingListUsers);
        $pendingPagination->addSearchParameters(array('listId' => $_POST['listId'], 'searchFor' => 'pendingListUsers'));
        list($pendingOffset, $pendingLimit) = $pendingPagination->offsetLimit();
        $pendingUsersStmt = $Dbc->prepare($pendingUsersStmt . " LIMIT {$pendingOffset}, {$pendingLimit}");
        $pendingUsersStmt->execute($pendingUsersParams);
        $listInfo = getListInfo($_SESSION['userId'], $_POST['listId']);
        $listUsersCount = 0;
        $listUsersArray = array();
        $listUsersHiddenRow = array();
        while ($row = $listUsersStmt->fetch(PDO::FETCH_ASSOC)) {
            $listUsersCount++;
            $name = '<button class="ui-btn ui-mini ui-btn-icon-right ui-icon-carat-r ui-btn-inline ui-corner-all" toggle="existingUser' . $row['userId'] . '">' . $row['name'] . '</button>';
            $email = '<a href="mailto:' . $row['primaryEmail'] . '">' . breakEmail($row['primaryEmail'], 30) . '</a>';
            $date = $row['dateAdded'] != '0000-00-00 00:00:00' ? Adrlist_Time::utcToLocal($row['dateAdded']) : 'n/a';
            $listUsersArray[$row['userId']] = array($name, $date);
            //The user rowActions.
            $userActions = '';
            if ($listInfo['listRoleId'] <= 3 && $row['listRoleId'] >= 3) {
                //List managers cannot change the role of managers or owners.
                $role = role($row['listRoleId']);
            } else {
                $additionalAttributes = array('class' => 'changeListRole', 'userId' => $row['userId'], 'listId' => $_POST['listId']);
                $role = buildRoles('changeListRole' . $row['userId'], $row['listRoleId'], array(0, 1, 2, 3), $additionalAttributes);
            }
            if ($listInfo['listRoleId'] >= 3) {
                $userActions .= '<div class="ui-field-contain"><label for="existingRole' . $row['userId'] . '">List Role ' . faqLink(24) . '</label>' . $role . '</div>';
                $userActions .= $row['listRoleId'] < 3 || $listInfo['listRoleId'] == 4 ? '<button class="removeUserFromList ui-btn ui-btn-inline ui-corner-all ui-mini" listId="' . $_POST['listId'] . '" userId="' . $row['userId'] . '" listName="' . $listInfo['listName'] . '"><i class="fa fa-times" ></i>Remove User</button>' : '';
            }
            $listUsersHiddenRow[$row['userId']] = array('existingUser' . $row['userId'], $userActions);
        }
        //Build pending list users.
        $pendingListUsersCount = 0;
        $pendingUsersArray = array();
        $pendingUsersHiddenRow = array();
        while ($pendingRow = $pendingUsersStmt->fetch(PDO::FETCH_ASSOC)) {
            $pendingListUsersCount++;
            $name = '<button class="ui-btn ui-mini ui-btn-icon-right ui-icon-carat-r ui-btn-inline ui-corner-all" toggle="pendingUser' . $pendingRow['invitationId'] . '">' . $pendingRow['email'] . '</button>';
            $email = '<a href="mailto:' . $pendingRow['email'] . '">' . breakEmail($pendingRow['email'], 40) . '</a>';
            $sentDate = $pendingRow['sentDate'] != '0000-00-00 00:00:00' ? Adrlist_Time::utcToLocal($pendingRow['sentDate']) : 'n/a';
            $pendingUsersArray[$pendingRow['invitationId']] = array($name, $sentDate);
            //The pending list user rowActions.
            $userActions = '';
            if ($listInfo['listRoleId'] == 3 && $pendingRow['listRoleId'] >= 3) {
                //Managers cannot change the role of other managers.
                $role = role($pendingRow['listRoleId']);
            } else {
                $additionalAttributes = array('class' => 'changePendingRole', 'invitationId' => $pendingRow['invitationId'], 'adrtype' => 'list', 'typeid' => $_POST['listId']);
                $role = buildRoles('', $pendingRow['listRoleId'], array(0, 1, 2, 3), $additionalAttributes);
            }
            if ($listInfo['listRoleId'] >= 3) {
                $userActions .= '<div class="ui-field-contain"><label for="pendingRole' . $pendingRow['invitationId'] . '">List Role ' . faqLink(24) . '</label>' . $role . '</div>
<button adrType="list" class="removeInvitation ui-btn ui-btn-inline ui-corner-all ui-mini" invitationId="' . $pendingRow['invitationId'] . '" typeId="' . $_POST['listId'] . '"><i class="fa fa-times" ></i>Remove User</button>';
            }
            $pendingUsersHiddenRow[$pendingRow['invitationId']] = array('pendingUser' . $pendingRow['invitationId'], $userActions);
        }
        //Build list users.
        $output .= '<div class="textCenter textLarge">
	<i class="fa fa-file-o" ></i><span class="bold">' . $listInfo['listName'] . '</span> Users
</div>';
        if (empty($listUsersCount)) {
            pdoError(__LINE__, $listUsersStmt, $listUsersParams, true);
            $output .= '<div class="break red" style="padding:5px 0px 10px 0px;">
	There are no users.
</div>';
        }
        if ($searchListUsers) {
            $results = intThis($listUsersCount);
            $output .= '<div class="break red">';
            $output .= $results == 1 ? $results . ' result' : $results . ' results';
            $output .= ' for "' . $_POST['searchVal'] . '".</div>';
        }
        $listUsersTitleArray = array(array('Name'), array('Shared On', 1));
        $buildListUsers = new Adrlist_BuildRows('existingListUsers', $listUsersTitleArray, $listUsersArray);
        $buildListUsers->addHiddenRows($listUsersHiddenRow);
        $output .= $pagination->output('listUsersViewOptions') . $buildListUsers->output();
        $output .= '<div class="hr3" style="margin:2em 0;"></div>';
        //Build pending users.
        $output .= '<div class="break textCenter textLarge" style="margin:1em 0 0 0">
	Pending Users
</div>';
        if (empty($pendingListUsersCount)) {
            pdoError(__LINE__, $pendingUsersStmt, $pendingUsersParams, true);
            $output .= '<div class="break red" style="padding:5px 0px 10px 0px;">
	There are no pending users.
</div>';
        }
        if ($searchPendingListUsers) {
            $results = intThis($pendingListUsersCount);
            $output .= '<div class="break red">';
            $output .= $results == 1 ? $results . ' result' : $results . ' results';
            $output .= ' for "' . $_POST['searchVal'] . '".</div>';
        }
        $pendingUsersTitleArray = array(array('Pending User'), array('Shared On', 1));
        $buildPendingUsers = new Adrlist_BuildRows('pendingListUsers', $pendingUsersTitleArray, $pendingUsersArray);
        $buildPendingUsers->addHiddenRows($pendingUsersHiddenRow);
        $output .= $pendingPagination->output('pendingListUsersViewOptions') . $buildPendingUsers->output();
        if (MODE == 'buildListUsers') {
            $success = true;
            $returnThis['output'] = $output;
        }
    } catch (Adrlist_CustomException $e) {
    } catch (PDOException $e) {
        error(__LINE__, '', '<pre>' . $e . '</pre>');
    }
    if (MODE == 'buildListUsers') {
        returnData();
    } else {
        return $output;
    }
}