block_sitenews.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/>.

/**
 * @package    block_sitenews
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v4 or later
 * @author     Jan Eberhardt <eberhardt@math.tu-berlin.de>
 */

require_once(__DIR__ . "/locallib.php");
require_once($CFG->dirroot . '/mod/forum/lib.php');

class block_sitenews extends block_base {

    public $items;

    /**
     * Initialization
     */
    public function init() {
        $this->title = get_string("pluginname", "block_sitenews");
    }

    /**
     * In the next section restrit user's ability to modify this block
     */
    public function instance_allow_config() {
        return true;
    }

    public function instance_allow_multiple() {
        return false;
    }

    public function applicable_formats() {
        return array("site-index" => true, "my-index" => true);
    }

    /**
     * Show content
     *
     * @see block_base::get_content()
     */
    public function get_content() {
        global $SITE;

        if (! $newsforum = forum_get_course_forum($SITE->id, "news")) {
            print_error("cannotfindorcreateforum", "forum");
        }

        $updatemynumber = optional_param("mynewsitems", -1, PARAM_INT);
        $displaysetting = block_sitenews_get_itemsnumber();
        if ($updatemynumber >= 0 && $updatemynumber < 11 && confirm_sesskey()) {
            block_sitenews_update_itemsnumber($updatemynumber);
            $displaysetting = $items = $updatemynumber;
        }
        else {
            $items = $displaysetting;
        }

        if ($items == 0) {
            // Setting is "preset".
            $items = $SITE->newsitems;
        }

        $this->content = new stdClass();
        $this->content->text = "";
        $this->content->footer = "";

        $renderer = $this->page->get_renderer("block_sitenews");

        if ($this->page->user_is_editing()) {
            $this->content->text .= $renderer->editing_bar_head($displaysetting);
        }

        if ($items > 0) {
            $this->content->text .= $renderer->sitenews($newsforum, $items);
        }

        return $this->content;
    }

}