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<?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 helper functions and callbacks
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*
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* @package block_comments
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* @copyright 2011 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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defined('MOODLE_INTERNAL') || die();
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/**
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* Validate comment parameter before perform other comments actions
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*
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* @package block_comments
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* @category comment
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*
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* @param stdClass $comment_param {
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* context => context the context object
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* courseid => int course id
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* cm => stdClass course module object
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* commentarea => string comment area
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* itemid => int itemid
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* }
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* @return boolean
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*/
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function block_comments_comment_validate($comment_param) {
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if ($comment_param->commentarea != 'page_comments') {
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throw new comment_exception('invalidcommentarea');
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}
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if ($comment_param->itemid != 0) {
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throw new comment_exception('invalidcommentitemid');
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}
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return true;
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}
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/**
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* Running addtional permission check on plugins
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*
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* @package block_comments
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* @category comment
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*
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* @param stdClass $args
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* @return array
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*/
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function block_comments_comment_permissions($args) {
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global $DB, $USER;
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// By default, anyone can post and view comments.
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$canpost = $canview = true;
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// Check if it's the user context and not the owner's profile.
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if ($args->context->contextlevel == CONTEXT_USER && $USER->id != $args->context->instanceid) {
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// Check whether the context owner has a comment block in the user's profile.
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$sqlparam = [
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'blockname' => 'comments',
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'parentcontextid' => $args->context->id,
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'pagetypepattern' => 'user-profile',
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];
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// If the comment block is not present at the target user's profile,
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// then the logged-in user cannot post or view comments.
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$canpost = $canview = $DB->record_exists_select(
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'block_instances',
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'blockname = :blockname AND parentcontextid = :parentcontextid AND pagetypepattern = :pagetypepattern',
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$sqlparam,
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);
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}
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return ['post' => $canpost, 'view' => $canview];
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}
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/**
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* Validate comment data before displaying comments
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*
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* @package block_comments
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* @category comment
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*
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* @param stdClass $comment
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* @param stdClass $args
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* @return boolean
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*/
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function block_comments_comment_display($comments, $args) {
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if ($args->commentarea != 'page_comments') {
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throw new comment_exception('invalidcommentarea');
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}
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if ($args->itemid != 0) {
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throw new comment_exception('invalidcommentitemid');
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}
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return $comments;
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}
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