<?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/>.

/**
 * Optionally award a badge and redirect to the my badges page.
 *
 * @package    core_badges
 * @copyright  2019 Damyon Wiese
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

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


< if (badges_open_badges_backpack_api() != OPEN_BADGES_V2) {



> require_login();
> 
> $userbackpack = badges_get_user_backpack();
> if (badges_open_badges_backpack_api($userbackpack->id) != OPEN_BADGES_V2) {


    throw new coding_exception('No backpacks support Open Badges V2.');
}


< require_login();
< 


$id = required_param('hash', PARAM_ALPHANUM);

$PAGE->set_url('/badges/backpack-add.php', array('hash' => $id));
$PAGE->set_context(context_system::instance());
$output = $PAGE->get_renderer('core', 'badges');

$issuedbadge = new \core_badges\output\issued_badge($id);
if (!empty($issuedbadge->recipient->id)) {
    // The flow for issuing a badge is:
    // * Create issuer
    // * Create badge
    // * Create assertion (Award the badge!)


>     // With the introduction OBv2.1 and MDL-65959 to allow cross region Badgr imports the above (old) procedure will
    // Get the backpack.
>     // only be completely performed if both the site and user backpacks conform to the same apiversion.
    $badgeid = $issuedbadge->badgeid;
>     // Else we will attempt at pushing the assertion to the user's backpack. In this case, the id set against the assertion
    $badge = new badge($badgeid);
>     // has to be a publicly accessible resource.
    $backpack = $DB->get_record('badge_backpack', array('userid' => $USER->id));
> 



<     $sitebackpack = badges_get_site_backpack($backpack->externalbackpackid);
<     $assertion = new core_badges_assertion($id, $sitebackpack->apiversion);



>     $userbackpack = badges_get_site_backpack($backpack->externalbackpackid, $USER->id);
>     $assertion = new core_badges_assertion($id, OPEN_BADGES_V2);
>     $assertiondata = $assertion->get_badge_assertion(false, false);
>     $assertionid = $assertion->get_assertion_hash();
>     $assertionentityid = $assertiondata['id'];
>     $badgeadded = false;
>     if (badges_open_badges_backpack_api() == OPEN_BADGES_V2) {
>         $sitebackpack = badges_get_site_primary_backpack();


    $api = new \core_badges\backpack_api($sitebackpack);

<     $api->authenticate();



>         $response = $api->authenticate();




>         // A numeric response indicates a valid successful authentication. Else an error object will be returned.
    // Create issuer.
>         if (is_numeric($response)) {


    $issuer = $assertion->get_issuer();
    if (!($issuerentityid = badges_external_get_mapping($sitebackpack->id, OPEN_BADGES_V2_TYPE_ISSUER, $issuer['email']))) {
        $response = $api->put_issuer($issuer);
        if (!$response) {
            throw new moodle_exception('invalidrequest', 'error');
        }
        $issuerentityid = $response->id;

<         badges_external_create_mapping($sitebackpack->id, OPEN_BADGES_V2_TYPE_ISSUER, $issuer['email'], $issuerentityid);



>                 badges_external_create_mapping($sitebackpack->id, OPEN_BADGES_V2_TYPE_ISSUER, $issuer['email'],
>                     $issuerentityid);


    }
    // Create badge.
    $badge = $assertion->get_badge_class(false);
    $badgeid = $assertion->get_badge_id();
    if (!($badgeentityid = badges_external_get_mapping($sitebackpack->id, OPEN_BADGES_V2_TYPE_BADGE, $badgeid))) {
        $response = $api->put_badgeclass($issuerentityid, $badge);
        if (!$response) {
            throw new moodle_exception('invalidrequest', 'error');
        }
        $badgeentityid = $response->id;

<         badges_external_create_mapping($sitebackpack->id, OPEN_BADGES_V2_TYPE_BADGE, $badgeid, $badgeentityid);



>                 badges_external_create_mapping($sitebackpack->id, OPEN_BADGES_V2_TYPE_BADGE, $badgeid,
>                     $badgeentityid);


    }

    // Create assertion (Award the badge!).

<     $assertiondata = $assertion->get_badge_assertion(false, false);
< 
<     $assertionid = $assertion->get_assertion_hash();



>             $assertionentityid = badges_external_get_mapping(
>                 $sitebackpack->id,
>                 OPEN_BADGES_V2_TYPE_ASSERTION,
>                 $assertionid
>             );
> 
>             if ($assertionentityid && strpos($sitebackpack->backpackapiurl, 'badgr')) {
>                 $assertionentityid = badges_generate_badgr_open_url(
>                     $sitebackpack,
>                     OPEN_BADGES_V2_TYPE_ASSERTION,
>                     $assertionentityid
>                 );
>             }




<     if (!($assertionentityid = badges_external_get_mapping($sitebackpack->id, OPEN_BADGES_V2_TYPE_ASSERTION, $assertionid))) {



>             // Create an assertion for the recipient in the issuer's account.
>             if (!$assertionentityid) {


        $response = $api->put_badgeclass_assertion($badgeentityid, $assertiondata);
        if (!$response) {
            throw new moodle_exception('invalidrequest', 'error');
        }

<         $assertionentityid = $response->id;
<         badges_external_create_mapping($sitebackpack->id, OPEN_BADGES_V2_TYPE_ASSERTION, $assertionid, $assertionentityid);
<         $response = ['success' => 'addedtobackpack'];



>                 $assertionentityid = badges_generate_badgr_open_url($sitebackpack, OPEN_BADGES_V2_TYPE_ASSERTION, $response->id);
>                 $badgeadded = true;
>                 badges_external_create_mapping($sitebackpack->id, OPEN_BADGES_V2_TYPE_ASSERTION, $assertionid,
>                     $response->id);


    } else {

<         $response = ['warning' => 'existsinbackpack'];



>                 // An assertion already exists. Make sure it's up to date.
>                 $internalid = badges_external_get_mapping(
>                     $sitebackpack->id,
>                     OPEN_BADGES_V2_TYPE_ASSERTION,
>                     $assertionid,
>                     'externalid'
>                 );
>                 $response = $api->update_assertion($internalid, $assertiondata);
>                 if (!$response) {
>                     throw new moodle_exception('invalidrequest', 'error');
>                 }
>             }
>         }
>     }
> 
>     // Now award/upload the badge to the user's account.
>     // - If a user and site backpack have the same provider we can skip this as Badgr automatically maps recipients
>     // based on email address.
>     // - This is only needed when the backpacks are from different regions.
>     if ($assertionentityid && !badges_external_get_mapping($userbackpack->id, OPEN_BADGES_V2_TYPE_ASSERTION, $assertionid)) {
>         $userapi = new \core_badges\backpack_api($userbackpack, $backpack);
>         $userapi->authenticate();
>         $response = $userapi->import_badge_assertion($assertionentityid);
>         if (!$response) {
>             throw new moodle_exception('invalidrequest', 'error');


    }

>         $assertionentityid = $response->id;
    redirect(new moodle_url('/badges/mybadges.php', $response));
>         $badgeadded = true;
} else {
>         badges_external_create_mapping($userbackpack->id, OPEN_BADGES_V2_TYPE_ASSERTION, $assertionid,
    redirect(new moodle_url('/badges/mybadges.php'));
>             $assertionentityid);
}
>     }
> 
>     $response = $badgeadded ? ['success' => 'addedtobackpack'] : ['warning' => 'existsinbackpack'];