<?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/>.

/**
 * Displays external information about a course
 * @package    core_course
 * @copyright  1999 onwards Martin Dougiamas  http://dougiamas.com
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

require_once("../config.php");
require_once($CFG->dirroot.'/course/lib.php');

$q         = optional_param('q', '', PARAM_RAW);       // Global search words.
$search    = optional_param('search', '', PARAM_RAW);  // search words
$page      = optional_param('page', 0, PARAM_INT);     // which page to show
$perpage   = optional_param('perpage', '', PARAM_RAW); // how many per page, may be integer or 'all'
$blocklist = optional_param('blocklist', 0, PARAM_INT);
$modulelist= optional_param('modulelist', '', PARAM_PLUGIN);
$tagid     = optional_param('tagid', '', PARAM_INT);   // searches for courses tagged with this tag id

// Use global search.
if ($q) {
    $search = $q;
}

// List of minimum capabilities which user need to have for editing/moving course
$capabilities = array('moodle/course:create', 'moodle/category:manage');

// Populate usercatlist with list of category id's with course:create and category:manage capabilities.
$usercatlist = core_course_category::make_categories_list($capabilities);

$search = trim(strip_tags($search)); // trim & clean raw searched string

$site = get_site();

$searchcriteria = array();
foreach (array('search', 'blocklist', 'modulelist', 'tagid') as $param) {
    if (!empty($$param)) {
        $searchcriteria[$param] = $$param;
    }
}
$urlparams = array();
if ($perpage !== 'all' && !($perpage = (int)$perpage)) {
    // default number of courses per page
    $perpage = $CFG->coursesperpage;
} else {
    $urlparams['perpage'] = $perpage;
}
if (!empty($page)) {
    $urlparams['page'] = $page;
}
$PAGE->set_url('/course/search.php', $searchcriteria + $urlparams);
$PAGE->set_context(context_system::instance());
$PAGE->set_pagelayout('standard');
$courserenderer = $PAGE->get_renderer('core', 'course');

if ($CFG->forcelogin) {
    require_login();
}

$strcourses = new lang_string("courses");
$strsearch = new lang_string("search");
$strsearchresults = new lang_string("searchresults");
$strnovalidcourses = new lang_string('novalidcourses');

$courseurl = core_course_category::user_top() ? new moodle_url('/course/index.php') : null;
$PAGE->navbar->add($strcourses, $courseurl);
$PAGE->navbar->add($strsearch, new moodle_url('/course/search.php'));
if (!empty($search)) {
    $PAGE->navbar->add(s($search));
}

if (empty($searchcriteria)) {
    // no search criteria specified, print page with just search form
    $PAGE->set_title($strsearch);
} else {
    // this is search results page
    $PAGE->set_title($strsearchresults);
    // Link to manage search results should be visible if user have system or category level capability
    if ((can_edit_in_category() || !empty($usercatlist))) {
        $aurl = new moodle_url('/course/management.php', $searchcriteria);
        $searchform = $OUTPUT->single_button($aurl, get_string('managecourses'), 'get');
        $PAGE->set_button($searchform);
    }

    // Trigger event, courses searched.
    $eventparams = array('context' => $PAGE->context, 'other' => array('query' => $search));
    $event = \core\event\courses_searched::create($eventparams);
    $event->trigger();
}

$PAGE->set_heading($site->fullname);

echo $OUTPUT->header();
echo $courserenderer->search_courses($searchcriteria);
echo $OUTPUT->footer();