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1 efrain 1 
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
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/**
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 * The comments block
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 *
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 * @package    block_comments
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 * @copyright 2009 Dongsheng Cai <dongsheng@moodle.com>
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 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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 */
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class block_comments extends block_base
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{
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    function init()
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    {
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        global $CFG;
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        require_once($CFG->dirroot . '/comment/lib.php');
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        $this->title = get_string('pluginname', 'block_comments');
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    }
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    /*function specialization()
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    {
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        // require js for commenting
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        comment::init();
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    }*/
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    public function applicable_formats()
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    {
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        return [
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            'all' => false,
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            'my' => false,
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            'admin' => false,
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            'course' => false,
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            'course-view' => true,
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            'enrol' => true,
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        ];
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    }
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    function specialization()
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    {
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        global $CFG, $DB;
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        if (empty($this->config)) {
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            $this->instance->defaultregion = 'bellow-content';
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            $this->instance->region = 'bellow-content';
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            $DB->update_record('block_instances', $this->instance);
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            $this->title = 'Comments';
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        } else {
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            $this->title = get_string('pluginname', 'comments');
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        }
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    }
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    /*function applicable_formats()
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    {
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        return array('all' => true);
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    }*/
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    function instance_allow_multiple()
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    {
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        return false;
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    }
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    function get_content()
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    {
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        global $CFG;
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        if ($this->content !== NULL) {
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            return $this->content;
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        }
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        if (!$CFG->usecomments) {
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            $this->content = new stdClass();
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            $this->content->text = '';
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            if ($this->page->user_is_editing()) {
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                $this->content->text = get_string('disabledcomments');
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            }
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            return $this->content;
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        }
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        $this->content = new stdClass();
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        $this->content->footer = '';
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        $this->content->text = '';
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        if (empty($this->instance)) {
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            return $this->content;
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        }
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        list($context, $course, $cm) = get_context_info_array($this->page->context->id);
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        $args = new stdClass;
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        $args->context   = $this->page->context;
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        $args->course    = $course;
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        $args->area      = 'page_comments';
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        $args->itemid    = 0;
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        $args->component = 'block_comments';
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        $args->linktext  = get_string('showcomments');
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        $args->notoggle  = true;
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        $args->autostart = true;
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        $args->displaycancel = false;
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        $comment = new comment($args);
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        $comment->set_view_permission(true);
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        $comment->set_fullwidth();
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        $this->content = new stdClass();
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        $this->content->text = $comment->output(true);
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        $this->content->footer = '';
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        return $this->content;
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    }
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    /**
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     * This block shouldn't be added to a page if the comments advanced feature is disabled.
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     *
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     * @param moodle_page $page
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     * @return bool
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     */
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    public function can_block_be_added(moodle_page $page): bool
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    {
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        global $CFG;
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        return $CFG->usecomments;
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    }
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}