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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
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/**
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 * Show a user the policy documents to be agreed to.
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 *
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 * Script parameters:
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 *  listdoc=<array> List of policy version ids that were displayed to the user to accept.
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 *  statusXX=<int> Acceptance status to be set for the policy version with id XX.
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 *  behalfid=<id> The user id to view the policy version as (such as child's id).
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 *
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 * @package     tool_policy
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 * @copyright   2018 Sara Arjona (sara@moodle.com)
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 * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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 */
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use tool_policy\api;
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use tool_policy\output\page_agreedocs;
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// Do not check for the site policies in require_login() to avoid the redirect loop.
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define('NO_SITEPOLICY_CHECK', true);
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// See the {@see page_agreedocs} for the access control checks.
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require(__DIR__.'/../../../config.php'); // phpcs:ignore
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$submit = optional_param('submit', null, PARAM_NOTAGS);
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$cancel = optional_param('cancel', null, PARAM_NOTAGS);
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$listdocs = optional_param_array('listdoc', [], PARAM_INT);
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$behalfid = optional_param('userid', null, PARAM_INT);
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$agreedocs = [];
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$declinedocs = [];
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foreach ($listdocs as $pvid) {
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    $status = optional_param('status'.$pvid, null, PARAM_INT);
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    if ($status === 1) {
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        $agreedocs[] = $pvid;
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    } else if ($status === 0) {
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        $declinedocs[] = $pvid;
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    }
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}
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$listdocs = array_values(array_unique($listdocs));
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$agreedocs = array_values(array_unique($agreedocs));
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$declinedocs = array_values(array_unique($declinedocs));
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$PAGE->set_context(context_system::instance());
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$PAGE->set_pagelayout('standard');
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$PAGE->set_url('/admin/tool/policy/index.php');
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$PAGE->set_popup_notification_allowed(false);
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if (array_diff($agreedocs, $listdocs) || array_diff($declinedocs, $listdocs)) {
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    throw new moodle_exception('invalidaccessparameter');
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}
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if (isloggedin() && !isguestuser()) {
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    // Existing user.
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    $haspermissionagreedocs = api::can_accept_policies($listdocs, $behalfid);
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} else {
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    // New user.
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    $haspermissionagreedocs = true;
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}
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if (!$haspermissionagreedocs) {
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    $outputpage = new \tool_policy\output\page_nopermission($listdocs, $behalfid);
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} else if ($cancel) {
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    redirect(new moodle_url('/'));
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} else {
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    if (!$behalfid && \core\session\manager::is_loggedinas()) {
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        $behalfid = $USER->id;
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    }
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    $outputpage = new \tool_policy\output\page_agreedocs($listdocs, $agreedocs, $declinedocs, $behalfid, $submit);
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}
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$output = $PAGE->get_renderer('tool_policy');
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echo $output->header();
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echo $output->render($outputpage);
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echo $output->footer();