<?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/>.

/**
 * Handles displaying the calendar block.
 *
 * @package    block_calendar_month
 * @copyright  2004 Eloy Lafuente (stronk7) {@link http://stronk7.com}
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class block_calendar_month extends block_base {

    /**
     * Initialise the block.
     */
    public function init() {
        $this->title = get_string('pluginname', 'block_calendar_month');
    }

    /**
     * Return preferred_width.
     *
     * @return int
     */
    public function preferred_width() {
        return 210;
    }

    /**
     * Return the content of this block.
     *
     * @return stdClass the content
     */
    public function get_content() {
        global $CFG;

        $calm = optional_param('cal_m', 0, PARAM_INT);
        $caly = optional_param('cal_y', 0, PARAM_INT);
        $time = optional_param('time', 0, PARAM_INT);

        require_once($CFG->dirroot.'/calendar/lib.php');

        if ($this->content !== null) {
            return $this->content;
        }

        // If a day, month and year were passed then convert it to a timestamp. If these were passed then we can assume
        // the day, month and year are passed as Gregorian, as no where in core should we be passing these values rather
        // than the time. This is done for BC.
        if (!empty($calm) && (!empty($caly))) {
            $time = make_timestamp($caly, $calm, 1);
        } else if (empty($time)) {
            $time = time();
        }

        $this->content = new stdClass;
        $this->content->text = '';
        $this->content->footer = '';

        // [pj] To me it looks like this if would never be needed, but Penny added it
        // when committing the /my/ stuff. Reminder to discuss and learn what it's about.
        // It definitely needs SOME comment here!
        $courseid = $this->page->course->id;
        $issite = ($courseid == SITEID);

        if ($issite) {
            // Being displayed at site level. This will cause the filter to fall back to auto-detecting
            // the list of courses it will be grabbing events from.
            $filtercourse = calendar_get_default_courses();
        } else {
            // Forcibly filter events to include only those from the particular course we are in.
            $filtercourse = array($courseid => $this->page->course);
        }

        list($courses, $group, $user) = calendar_set_filters($filtercourse);
        if ($issite) {
            // For the front page.
            $this->content->text .= calendar_get_mini($courses, $group, $user, false, false, 'frontpage', $courseid, $time);
            // No filters for now.
        } else {
            // For any other course.
            $this->content->text .= calendar_get_mini($courses, $group, $user, false, false, 'course', $courseid, $time);
            $this->content->text .= '<h3 class="eventskey">'.get_string('eventskey', 'calendar').'</h3>';
            $this->content->text .= '<div class="filters calendar_filters">'.calendar_filter_controls($this->page->url).'</div>';
        }

        return $this->content;
    }
}