<?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/>.


/**
 * Blog Menu Block page.
 *
 * @package    moodlecore
 * @subpackage blog
 * @copyright  2009 Nicolas Connault
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */


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

class block_blog_menu extends block_base {

    function init() {
        $this->title = get_string('blockmenutitle', 'blog');
        $this->version = 2009071700;
    }

    function instance_allow_multiple() {
        return true;
    }

    function has_config() {
        return false;
    }

    function applicable_formats() {
        return array('all' => true, 'my' => false, 'tag' => false);
    }

    function instance_allow_config() {
        return true;
    }

    function get_content() {
        global $CFG, $USER, $PAGE, $OUTPUT;

        $context = $PAGE->context;

        // don't display menu block if block is set at site level, and user is not logged in
        if (empty($CFG->bloglevel) || ($CFG->bloglevel < BLOG_GLOBAL_LEVEL && !(isloggedin() && !isguestuser()))) {
            $this->content->text = '';
            if ($this->page->user_is_editing()) {
                $this->content->text = get_string('blogdisable', 'blog');
            }
            return $this->content;
        }

        $output = '';

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

        $blogheaders = blog_get_headers();
        $canviewblogs = has_capability('moodle/blog:view', $context);

        /// Accessibility: markup as a list.

        $blogmodon = false;
        $menulist = new html_list();
        $menulist->add_class('list');

        if (!empty($blogheaders['strview']) && $CFG->useblogassociations) {
            $url = html_link::make($blogheaders['url'], $blogheaders['strview']);
            if ($blogheaders['url']->compare($PAGE->url)) {
                $url->disabled = true;
            }
            $menulist->add_item($OUTPUT->link($url));
        }

        // show View site entries link
        if ($CFG->bloglevel >= BLOG_SITE_LEVEL && $canviewblogs) {
            $viewsiteentriesurl = html_link::make($CFG->wwwroot .'/blog/index.php', get_string('viewsiteentries', 'blog'));
            if (!$PAGE->url->param('search') && !$PAGE->url->param('tag') && !$PAGE->url->param('tagid') &&
                !$PAGE->url->param('modid') && !$PAGE->url->param('courseid') && !$PAGE->url->param('userid') && !$PAGE->url->param('entryid')) {
                $viewsiteentriesurl->disableifcurrent = true;
            }
            $menulist->add_item($OUTPUT->link($viewsiteentriesurl));
        }

        $output .= '';

        // show View my entries link
        $myentrieslink = html_link::make(new moodle_url($CFG->wwwroot .'/blog/index.php', array('userid' => $USER->id)), get_string('viewmyentries', 'blog'));
        $myentrieslink->url->params($blogheaders['url']->params());
        $myentrieslink->url->param('userid', $USER->id);
        $pageuserid = $PAGE->url->param('userid');
        if (!empty($pageuserid) && $pageuserid == $USER->id) {
            $myentrieslink->disabled = true;
        }

        $menulist->add_item($OUTPUT->link($myentrieslink));

        // show "Add entry" or "Blog about this" link
        $sitecontext = get_context_instance(CONTEXT_SYSTEM);
        if (has_capability('moodle/blog:create', $sitecontext)) {
            $addentrylink = html_link::make(new moodle_url($CFG->wwwroot .'/blog/edit.php', array('action' => 'add')), $blogheaders['stradd']);
            $addentrylink->url->params($blogheaders['url']->params());
            $addentrylink->disableifcurrent = true;
            $menulist->add_item($OUTPUT->link($addentrylink));
        }

        // Full-text search field
        if (has_capability('moodle/blog:search', $sitecontext)) {
            $searchform = new html_form();
            $searchform->method = 'get';
            $searchform->url = new moodle_url($blogheaders['url']);
            $searchform->button->text = get_string('search');
            $formcontents = $OUTPUT->field(html_field::make_text('search', '', '', 99));
            $menulist->add_item($OUTPUT->form($searchform, $formcontents));
        }

        $this->content->text = $OUTPUT->htmllist($menulist);
    }
}