<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * Form class for mybackpack.php
 *
 * @package    core
 * @subpackage badges
 * @copyright  2012 onwards Totara Learning Solutions Ltd {@link http://www.totaralms.com/}
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 * @author     Yuliya Bozhko <yuliya.bozhko@totaralms.com>
 */

namespace core_badges\form;

defined('MOODLE_INTERNAL') || die();

require_once($CFG->libdir . '/formslib.php');
require_once($CFG->libdir . '/badgeslib.php');

use html_writer;
use moodleform;
use stdClass;

/**
 * Form to edit backpack initial details.
 *
 */

< class backpack extends moodleform {



> class backpack extends external_backpack {



    /**
     * Defines the form
     */
    public function definition() {
        global $USER, $PAGE, $OUTPUT, $CFG;
        $mform = $this->_form;

>         $this->_customdata['userbackpack'] = 1;



        $mform->addElement('html', html_writer::tag('span', '', array('class' => 'notconnected', 'id' => 'connection-error')));
        $mform->addElement('header', 'backpackheader', get_string('backpackconnection', 'badges'));
        $mform->addHelpButton('backpackheader', 'backpackconnection', 'badges');
        $mform->addElement('hidden', 'userid', $USER->id);
        $mform->setType('userid', PARAM_INT);

<         $sitebackpack = badges_get_site_backpack($CFG->badges_site_backpack);
< 



>         $freeze = [];


        if (isset($this->_customdata['email'])) {
            // Email will be passed in when we're in the process of verifying the user's email address,
            // so set the connection status, lock the email field, and provide options to resend the verification
            // email or cancel the verification process entirely and start over.

<             $mform->addElement('hidden', 'backpackid', $sitebackpack->id);
<             $mform->setType('backpackid', PARAM_INT);



>             $freeze = ['backpackemail'];
>             $mform->addElement('hidden', 'password', $this->_customdata['backpackpassword']);
>             $mform->setType('password', PARAM_RAW);
>             $mform->addElement('hidden', 'externalbackpackid', $this->_customdata['backpackid']);
>             $mform->setType('externalbackpackid', PARAM_INT);


            $status = html_writer::tag('span', get_string('backpackemailverificationpending', 'badges'),
                array('class' => 'notconnected', 'id' => 'connection-status'));

>         } else {
            $mform->addElement('static', 'status', get_string('status'), $status);
>             $sitebackpacks = badges_get_site_backpacks();
            $mform->addElement('hidden', 'email', $this->_customdata['email']);
>             $choices = [];
            $mform->setType('email', PARAM_EMAIL);
>             $restrictedoptions = [];
            $mform->hardFreeze(['email']);
>             foreach ($sitebackpacks as $backpack) {
            $emailverify = html_writer::tag('span', s($this->_customdata['email']), []);
>                 $choices[$backpack->id] = $backpack->backpackweburl;
            $mform->addElement('static', 'emailverify', get_string('email'), $emailverify);
>                 if ($backpack->apiversion == OPEN_BADGES_V2P1) {
            $mform->addElement('hidden', 'backpackpassword', $this->_customdata['backpackpassword']);
>                     $restrictedoptions[] = $backpack->id;
            $mform->setType('backpackpassword', PARAM_RAW);
>                 }
            $buttonarray = [];
>             }
            $buttonarray[] = &$mform->createElement('submit', 'submitbutton',
>             $mform->addElement('select', 'externalbackpackid', get_string('backpackprovider', 'badges'), $choices);
                                                    get_string('backpackconnectionresendemail', 'badges'));
>             $mform->setType('externalbackpackid', PARAM_INT);
            $buttonarray[] = &$mform->createElement('submit', 'revertbutton',
>             $defaultbackpack = badges_get_site_primary_backpack();
                                                    get_string('backpackconnectioncancelattempt', 'badges'));
>             $mform->setDefault('externalbackpackid', $defaultbackpack->id);
            $mform->addGroup($buttonarray, 'buttonar', '', [''], false);
>             $mform->hideIf('password', 'externalbackpackid', 'in', $restrictedoptions);
            $mform->closeHeaderBefore('buttonar');
>             $mform->hideIf('backpackemail', 'externalbackpackid', 'in', $restrictedoptions);
        } else {
> 
            // Email isn't present, so provide an input element to get it and a button to start the verification process.
>             $status = html_writer::tag('span', get_string('notconnected', 'badges'),

>                 array('class' => 'notconnected', 'id' => 'connection-status'));
            $mform->addElement('static', 'info', get_string('backpackweburl', 'badges'), $sitebackpack->backpackweburl);
>         }



<             $mform->addElement('hidden', 'email', $this->_customdata['email']);
<             $mform->setType('email', PARAM_EMAIL);
<             $mform->hardFreeze(['email']);
<             $emailverify = html_writer::tag('span', s($this->_customdata['email']), []);
<             $mform->addElement('static', 'emailverify', get_string('email'), $emailverify);
<             $mform->addElement('hidden', 'backpackpassword', $this->_customdata['backpackpassword']);
<             $mform->setType('backpackpassword', PARAM_RAW);



> 
>         $this->add_auth_fields($this->_customdata['email'] ?? $USER->email, !isset($this->_customdata['email']));
> 
>         $mform->setDisableShortforms(false);
> 
>         // Freeze any elemnts after definition.
>         if ($freeze) {
>             $mform->freeze($freeze);
>         }
>         $this->add_action_buttons();
>     }
> 
>     /**
>      * Override add_action_buttons
>      *
>      * @param bool $cancel
>      * @param null|text $submitlabel
>      */
>     public function add_action_buttons($cancel = true, $submitlabel = null) {
>         $mform = $this->_form;
>         if (isset($this->_customdata['email'])) {



< 
<             $mform->addElement('static', 'info', get_string('backpackweburl', 'badges'), $sitebackpack->backpackweburl);
<             $mform->addElement('hidden', 'backpackid', $sitebackpack->id);
<             $mform->setType('backpackid', PARAM_INT);
< 
<             $status = html_writer::tag('span', get_string('notconnected', 'badges'),
<                 array('class' => 'notconnected', 'id' => 'connection-status'));
<             $mform->addElement('static', 'status', get_string('status'), $status);
<             if (badges_open_badges_backpack_api() != OPEN_BADGES_V2P1) {
<                 $mform->addElement('text', 'email', get_string('email'), 'maxlength="100" size="30"');
<                 $mform->addHelpButton('email', 'backpackemail', 'badges');
<                 $mform->addRule('email', get_string('required'), 'required', null, 'client');
<                 $mform->setType('email', PARAM_EMAIL);
<                 if (badges_open_badges_backpack_api() == OPEN_BADGES_V2) {
<                     $mform->addElement('passwordunmask', 'backpackpassword', get_string('password'));
<                     $mform->setType('backpackpassword', PARAM_RAW);
<                 } else {
<                     $mform->addElement('hidden', 'backpackpassword', '');
<                     $mform->setType('backpackpassword', PARAM_RAW);
<                 }
<             }
<             $this->add_action_buttons(false, get_string('backpackconnectionconnect', 'badges'));



>             parent::add_action_buttons(false, get_string('backpackconnectionconnect', 'badges'));



<         global $CFG;
< 
<         $errors = parent::validation($data, $files);



<             return $errors;



>             return [];


        // We don't need to verify the email address if we're clearing a pending email verification attempt.

> 



<         if (!isset($data['revertbutton'])) {



>         if (isset($data['revertbutton'])) {
>             return [];
>         }
> 
>         $errors = [];
>         // Email and password can't be blank.
>         if (empty($data['backpackemail'])) {
>             $errors['backpackemail'] = get_string('backpackemail_required', 'badges');
>         }
>         if (empty($data['password'])) {
>             $errors['password'] = get_string('password_required', 'badges');
>         }
>         if (!empty($errors)) {
>             return $errors;
>         }
> 
>         // Check the given credentials (email and password) are valid for this backpack.


            $check = new stdClass();

<             $backpack = badges_get_site_backpack($data['backpackid']);
<             $check->email = $data['email'];
<             $check->password = $data['backpackpassword'];
<             $check->externalbackpackid = $backpack->id;



>         $check->email = $data['backpackemail'];
>         $check->password = $data['password'];
>         $sitebackpack = badges_get_site_backpack($data['externalbackpackid']);
>         $bp = new \core_badges\backpack_api($sitebackpack, $check);




<             $bp = new \core_badges\backpack_api($backpack, $check);


            $result = $bp->authenticate();
            if ($result === false || !empty($result->error)) {

<                 $errors['email'] = get_string('backpackconnectionunexpectedresult', 'badges');


                $msg = $bp->get_authentication_error();

<                 if (!empty($msg)) {
<                     $errors['email'] .= '<br/><br/>';
<                     $errors['email'] .= get_string('backpackconnectionunexpectedmessage', 'badges', $msg);
<                 }
<             }



>             $errors['backpackemail'] = get_string('backpackconnectionunexpectedresult', 'badges', $msg);


        }
        return $errors;
    }
}