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4 ariadna 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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 * Function's library
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 *
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 * @package    block_point_view
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 * @copyright  2020 Quentin Fombaron
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 * @author     Quentin Fombaron <q.fombaron@outlook.fr>
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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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use core\session\manager;
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/**
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 * Callback checking permissions and preparing the file for serving plugin files.
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 *
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 * @param stdClass $course Course object
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 * @param stdClass $bi Block instance record
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 * @param context_course|context_system $context Context object
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 * @param string $filearea File area
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 * @param array $args Extra arguments
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 * @param bool $forcedownload Whether or not force download
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 * @param array $options Additional options affecting the file serving
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 *
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 * @return bool
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 */
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function block_point_view_pluginfile($course, $bi, $context, $filearea, $args, $forcedownload, array $options = []) {
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    global $CFG, $USER;
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    $fs = get_file_storage();
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    $filename = array_pop($args);
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    if ($filearea === 'content') {
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        if ($context->contextlevel != CONTEXT_BLOCK) {
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            send_file_not_found();
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        }
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        if ($context->get_course_context(false)) {
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            require_course_login($course);
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        } else if ($CFG->forcelogin) {
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            require_login();
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        } else {
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            $parentcontext = $context->get_parent_context();
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            if ($parentcontext->contextlevel === CONTEXT_COURSECAT) {
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                if (!core_course_category::get($parentcontext->instanceid, IGNORE_MISSING)) {
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                    send_file_not_found();
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                }
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            } else if ($parentcontext->contextlevel === CONTEXT_USER && $parentcontext->instanceid != $USER->id) {
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                send_file_not_found();
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            }
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        }
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        $file = $fs->get_file(
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            $context->id,
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            'block_point_view',
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            $filearea,
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            0,
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            '/',
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            $filename
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        );
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        if (!$file || $file->is_directory()) {
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            send_file_not_found();
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        }
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    } else if (($filearea === 'point_views_pix') || ($filearea === 'point_views_pix_admin')) {
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        $file = $fs->get_file(
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            $context->id,
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            'block_point_view',
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            $filearea,
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            0,
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            '/',
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            $filename . '.png'
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        );
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        if (!$file || $file->is_directory()) {
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            send_file_not_found();
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        }
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    } else {
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        send_file_not_found();
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    }
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    manager::write_close();
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    send_stored_file($file, null, 0, true, $options);
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    return true;
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}
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/**
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 * Returns the list of Moodle features this block supports.
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 * @param string $feature FEATURE_xx constant.
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 * @return boolean|null Whether this block supports feature, null if unspecified.
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 */
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function block_point_view_supports($feature) {
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    switch($feature) {
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        case FEATURE_BACKUP_MOODLE2 :
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            return true;
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        default:
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            return null;
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    }
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}
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/**
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 * Perform global search replace such as when migrating site to new URL.
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 *
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 * @param string $search
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 * @param string $replace
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 *
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 * @throws dml_exception
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 */
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function block_point_view_global_db_replace($search, $replace) {
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    global $DB;
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    $instances = $DB->get_recordset('block_instances', [ 'blockname' => 'point_view' ]);
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    foreach ($instances as $instance) {
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        $config = unserialize(base64_decode($instance->configdata));
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        if (isset($config->text) && is_string($config->text)) {
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            $config->text = str_replace($search, $replace, $config->text);
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            $DB->update_record('block_instances', ['id' => $instance->id,
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                'configdata' => base64_encode(serialize($config)), 'timemodified' => time()]);
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        }
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    }
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    $instances->close();
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}
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/**
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 * Given an array with a file path, it returns the itemid and the filepath for the defined filearea.
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 *
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 * @param string $filearea
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 * @param array $args
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 *
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 * @return array
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 */
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function block_point_view_get_path_from_pluginfile($filearea, $args) {
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    array_shift($args);
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    if (empty($args)) {
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        $filepath = '/';
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    } else {
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        $filepath = '/' . implode('/', $args) . '/';
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    }
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    return [
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        'itemid' => 0,
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        'filepath' => $filepath,
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    ];
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}