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✏️ Editing: user_roles_editable.php

<?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/>.

namespace core_user\output;

use context_course;
use core_user;
use core_external\external_api;
use coding_exception;

/**
 * Class to display list of user roles.
 *
 * @package   core_user
 * @copyright 2017 Damyon Wiese
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class user_roles_editable extends \core\output\inplace_editable {

/** @var $context */
    private $context = null;

/** @var \stdClass[] $courseroles */
    private $courseroles;

/** @var \stdClass[] $profileroles */
    private $profileroles;

/** @var \stdClass[] $viewableroles */
    private $viewableroles;

/** @var \stdClass[] $assignableroles */
    private $assignableroles;

/**
     * Constructor.
     *
     * @param \stdClass $course The current course
     * @param \context $context The course context
     * @param \stdClass $user The current user
     * @param \stdClass[] $courseroles The list of course roles.
     * @param \stdClass[] $assignableroles The list of assignable roles in this course.
     * @param \stdClass[] $profileroles The list of roles that should be visible in a users profile.
     * @param \stdClass[] $userroles The list of user roles.
     */
    public function __construct($course, $context, $user, $courseroles, $assignableroles, $profileroles, $userroles, $viewableroles = null) {
        if ($viewableroles === null) {
            debugging('Constructor for user_roles_editable now needs the result of get_viewable_roles passed as viewableroles');
        }

// Check capabilities to get editable value.
        $editable = has_capability('moodle/role:assign', $context);

// Invent an itemid.
        $itemid = $course->id . ':' . $user->id;

$getrole = function($role) {
            return $role->roleid;
        };
        $ids = array_values(array_unique(array_map($getrole, $userroles)));

$value = json_encode($ids);

// Remember these for the display value.
        $this->courseroles = $courseroles;
        $this->profileroles = $profileroles;
        $this->viewableroles = array_keys($viewableroles);
        $this->assignableroles = array_keys($assignableroles);
        $this->context = $context;

parent::__construct('core_user', 'user_roles', $itemid, $editable, $value, $value);

// Removed the roles that were assigned to the user at a different context.
        $options = $assignableroles;
        foreach ($userroles as $role) {
            if (isset($assignableroles[$role->roleid])) {
                if ($role->contextid != $context->id) {
                    unset($options[$role->roleid]);
                }
            }
        }

$fullname = htmlspecialchars(fullname($user), ENT_QUOTES, 'utf-8');
        $this->edithint = get_string('xroleassignments', 'role', $fullname);
        $this->editlabel = get_string('xroleassignments', 'role', $fullname);

$attributes = ['multiple' => true];
        $this->set_type_autocomplete($options, $attributes);
    }

/**
     * Export this data so it can be used as the context for a mustache template.
     *
     * @param \renderer_base $output
     * @return array
     */
    public function export_for_template(\renderer_base $output) {
        $listofroles = [];
        $roleids = json_decode($this->value);
        $viewableroleids = array_intersect($roleids, array_merge($this->viewableroles, $this->assignableroles));

foreach ($viewableroleids as $id) {
            // If this is a student, we only show a subset of the roles.
            if ($this->editable || array_key_exists($id, $this->profileroles)) {
                $listofroles[] = format_string($this->courseroles[$id]->localname, true, ['context' => $this->context]);
            }
        }

if (!empty($listofroles)) {
            $this->displayvalue = implode(', ', $listofroles);
        } else if (!empty($roleids) && empty($viewableroleids)) {
            $this->displayvalue = get_string('novisibleroles', 'role');
        } else {
            $this->displayvalue = get_string('noroles', 'role');
        }
        return parent::export_for_template($output);
    }

/**
     * Updates the value in database and returns itself, called from inplace_editable callback
     *
     * @param int $itemid
     * @param mixed $newvalue
     * @return \self
     */
    public static function update($itemid, $newvalue) {
        global $DB;

// Check caps.
        // Do the thing.
        // Return one of me.
        // Validate the inputs.
        list($courseid, $userid) = explode(':', $itemid, 2);

$courseid = clean_param($courseid, PARAM_INT);
        $userid = clean_param($userid, PARAM_INT);
        $roleids = json_decode($newvalue);
        foreach ($roleids as $index => $roleid) {
            $roleids[$index] = clean_param($roleid, PARAM_INT);
        }

// Check user is enrolled in the course.
        $context = context_course::instance($courseid);
        external_api::validate_context($context);

// Check permissions.
        require_capability('moodle/role:assign', $context);

if (!is_enrolled($context, $userid)) {
            throw new coding_exception('User does not belong to the course');
        }

// Check that all the groups belong to the course.
        $allroles = role_fix_names(get_all_roles($context), $context, ROLENAME_BOTH);
        $assignableroles = get_assignable_roles($context, ROLENAME_BOTH, false);
        $viewableroles = get_viewable_roles($context);
        $userrolesbyid = get_user_roles($context, $userid, true, 'c.contextlevel DESC, r.sortorder ASC');
        $profileroles = get_profile_roles($context);

// Set an array where the index is the roleid.
        $userroles = array();
        foreach ($userrolesbyid as $id => $role) {
            $userroles[$role->roleid] = $role;
        }

$rolestoprocess = [];
        foreach ($roleids as $roleid) {
            if (!isset($assignableroles[$roleid])) {
                throw new coding_exception('Role cannot be assigned in this course.');
            }
            $rolestoprocess[$roleid] = $roleid;
        }

// Process adds.
        foreach ($rolestoprocess as $roleid) {
            if (!isset($userroles[$roleid])) {
                // Add them.
                $id = role_assign($roleid, $userid, $context);
                // Keep this variable in sync.
                $role = new \stdClass();
                $role->id = $id;
                $role->roleid = $roleid;
                $role->contextid = $context->id;
                $userroles[$role->roleid] = $role;
            }
        }

// Process removals.
        foreach ($assignableroles as $roleid => $rolename) {
            if (isset($userroles[$roleid]) && !isset($rolestoprocess[$roleid])) {
                // Do not remove the role if we are not in the same context.
                if ($userroles[$roleid]->contextid != $context->id) {
                    continue;
                }
                $ras = $DB->get_records('role_assignments', ['contextid' => $context->id, 'userid' => $userid,
                    'roleid' => $roleid]);
                $allremoved = true;
                foreach ($ras as $ra) {
                    if ($ra->component) {
                        if (strpos($ra->component, 'enrol_') !== 0) {
                            continue;
                        }
                        if (!$plugin = enrol_get_plugin(substr($ra->component, 6))) {
                            continue;
                        }
                        if ($plugin->roles_protected()) {
                            $allremoved = false;
                            continue;
                        }
                    }
                    role_unassign($ra->roleid, $ra->userid, $ra->contextid, $ra->component, $ra->itemid);
                }
                if ($allremoved) {
                    unset($userroles[$roleid]);
                }
            }
        }

$course = get_course($courseid);
        $user = core_user::get_user($userid);
        return new self($course, $context, $user, $allroles, $assignableroles, $profileroles, $userroles, $viewableroles);
    }
}

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