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<?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/>.

/**
 * Cohort related management functions, this file needs to be included manually.
 *
 * @package    core_cohort
 * @copyright  2010 Petr Skoda  {@link http://skodak.org}
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

use core_cohort\reportbuilder\local\systemreports\cohorts;
use core_reportbuilder\local\filters\text;
use core_reportbuilder\system_report_factory;

require('../config.php');
require_once($CFG->dirroot.'/cohort/lib.php');
require_once($CFG->libdir.'/adminlib.php');

$contextid = optional_param('contextid', 0, PARAM_INT);
$searchquery  = optional_param('search', '', PARAM_RAW);
$showall = optional_param('showall', false, PARAM_BOOL);

require_login();

if ($contextid) {
    $context = context::instance_by_id($contextid, MUST_EXIST);
} else {
    $context = context_system::instance();
}

if ($context->contextlevel != CONTEXT_COURSECAT and $context->contextlevel != CONTEXT_SYSTEM) {
    throw new \moodle_exception('invalidcontext');
}

$category = null;
if ($context->contextlevel == CONTEXT_COURSECAT) {
    $category = $DB->get_record('course_categories', array('id'=>$context->instanceid), '*', MUST_EXIST);
}

$manager = has_capability('moodle/cohort:manage', $context);
$canassign = has_capability('moodle/cohort:assign', $context);
if (!$manager) {
    require_capability('moodle/cohort:view', $context);
}

$strcohorts = get_string('cohorts', 'cohort');

if ($category) {
    $PAGE->set_pagelayout('admin');
    $PAGE->set_context($context);
    $PAGE->set_url('/cohort/index.php', array('contextid'=>$context->id));

    core_course_category::page_setup();
    // Set the cohorts node active in the settings navigation block.
    if ($cohortsnode = $PAGE->settingsnav->find('cohort', navigation_node::TYPE_SETTING)) {
        $cohortsnode->make_active();
    }

    $PAGE->set_title($strcohorts);
    $showall = false;
} else {
    admin_externalpage_setup('cohorts', '', null, '', array('pagelayout'=>'report'));
    navigation_node::override_active_url(new moodle_url('/cohort/index.php'));
    if ($showall) {
        $strallcohorts = get_string('allcohorts', 'cohort');
        $PAGE->set_title($strallcohorts);
        $PAGE->navbar->add($strallcohorts, $PAGE->url);
    } else {
        $strsystemcohorts = get_string('systemcohorts', 'cohort');
        $PAGE->set_title($strsystemcohorts);
    }
}

echo $OUTPUT->header();
echo $OUTPUT->heading($strallcohorts ?? $strsystemcohorts ?? $strcohorts);

$params = [];
if ($contextid) {
    $params['contextid'] = $contextid;
}
if ($searchquery) {
    $params['search'] = $searchquery;
}
if ($showall) {
    $params['showall'] = true;
}
$baseurl = new moodle_url('/cohort/index.php', $params);

if ($editcontrols = cohort_edit_controls($context, $baseurl)) {
    echo $OUTPUT->render($editcontrols);
}

$report = system_report_factory::create(cohorts::class, $context, '', '', 0, ['showall' => $showall]);

// Check if it needs to search by name.
if (!empty($searchquery)) {
    $report->set_filter_values([
        'cohort:name_operator' => text::CONTAINS,
        'cohort:name_value' => $searchquery,
    ]);
}

// Show the report.
echo $report->output();

// Show the delete selected button if there are records and user can manage cohorts in current context.
$canmanagecohorts = has_capability('moodle/cohort:manage', $context);
if ($showall) {
    $canmanagecohorts = $canmanagecohorts || core_course_category::has_capability_on_any('moodle/cohort:manage');
}

if ($canmanagecohorts && $DB->record_exists('cohort', [])) {
    echo $OUTPUT->render(new single_button(
        new moodle_url('#'),
        get_string('deleteselected'),
        'post',
        single_button::BUTTON_PRIMARY,
        ['data-action' => 'cohort-delete-selected']
    ));

    $PAGE->requires->js_call_amd('core_cohort/actions', 'init');
}

echo $OUTPUT->footer();