Course information

            // The mimetype does not include image.
            return false;
        }
 
        // If it looks like an image, and it smells like an image, perhaps it's an image!
        return true;
    }
 
    /**
     * Returns image information relating to the specified path or URL.
     *
     * @param string $path The full path of the image file.
     * @return array|bool array that containing width, height, and mimetype or false if cannot get the image info.
     */
    protected function get_imageinfo_from_path($path) {
        $imagemimetype = file_storage::mimetype_from_file($path);
        $issvgimage = file_is_svg_image_from_mimetype($imagemimetype);
 
        if (!$issvgimage) {
            $imageinfo = getimagesize($path);
            if (!is_array($imageinfo)) {
                return false; // Nothing to process, the file was not recognised as image by GD.
            }
            $image = [
                    'width' => $imageinfo[0],
                    'height' => $imageinfo[1],
                    'mimetype' => image_type_to_mime_type($imageinfo[2]),
            ];
        } else {
            // Since SVG file is actually an XML file, GD cannot handle.
            $svgcontent = @simplexml_load_file($path);
            if (!$svgcontent) {
                // Cannot parse the file.
                return false;
            }
            $svgattrs = $svgcontent->attributes();
 
            if (!empty($svgattrs->viewBox)) {
                // We have viewBox.
                $viewboxval = explode(' ', $svgattrs->viewBox);

     * @param stored_file $file The file to inspect
     *
     * @return mixed array with width, height and mimetype; false if not an image
     *
     * @throws Exception
     */
    public function get_imageinfo(stored_file $file) {
        if (!$this->is_image_from_storedfile($file)) {
            return false;
        }
 
        $hash = $file->get_contenthash();
        $cache = cache::make("core", "file_imageinfo");
        $info = $cache->get($hash);
        if ($info !== false) {
            return $info;
        }
 
        $path = $this->get_remote_path_from_hash($file->get_contenthash());
        $info = $this->get_imageinfo_from_path($path);
        $cache->set($hash, $info);
        return $info;
    }
 
    /**
     * Function get_remote_file_size
     *
     * @param $contenthash
     * @return int
     * @throws dml_exception
     */
    public function get_remote_file_size($contenthash) {
 
        $url = $this->get_remote_path_from_hash($contenthash);
        $curl = curl_init($url);
 
        // Issue a HEAD request and follow any redirects.
        curl_setopt($curl, CURLOPT_NOBODY, true);
        curl_setopt($curl, CURLOPT_HEADER, true);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

     * Determine whether the file is present on the local file system somewhere.
     *
     * @param stored_file $file The file to ensure is available.
     * @return bool
     * @throws Exception
     */
    public function is_file_readable_remotely_by_storedfile(stored_file $file) {
        return $this->filesysteminstance->is_file_readable_remotely_by_storedfile($file);
    }
 
    /**
     * Returns information about image.
     * Information is determined from the file content
     *
     * @param stored_file $file The file to inspect
     * @return mixed array with width, height and mimetype; false if not an image
     * @throws Exception
     */
    public function get_imageinfo(stored_file $file) {
        return $this->filesysteminstance->get_imageinfo($file);
    }
 
    /**
     * Returns file handle - read only mode, no writing allowed into pool files!
     *
     * When a consumer needs a seekable stream (for example requests using Range
     * headers in the mobile app), a signed remote URL is not enough because
     * functions like fseek() may fail. In those cases, download the file to a
     * request-local path first and open the local copy.
     *
     * @param stored_file $file The file to retrieve a handle for
     * @param int $type Type of file handle (FILE_HANDLE_xx constant)
     * @return resource file handle
     * @throws file_exception
     * @throws coding_exception
     */
    public function get_content_file_handle(stored_file $file, $type = stored_file::FILE_HANDLE_FOPEN) {
        if ($file->get_filesize() >= LOCAL_ALTERNATIVE_FILE_SYSTEM_MIN_DOWNLOAD_SIZE) {
            $localpath = $this->get_local_file_for_stored_file($file);
            return self::get_file_handle_for_path($localpath, $type);

                // This file is not stored locally - attempt to retrieve it from the repository.
                // This may happen if the repository deliberately does not fetch files, or if there is a failure with the sync.
                $fileinfo = $this->repository->get_file($this->get_reference());
                if (isset($fileinfo['path'])) {
                    return $filearch->add_file_from_pathname($archivepath, $fileinfo['path']);
                }
            }
        }
 
        return $this->filesystem->add_storedfile_to_archive($this, $filearch, $archivepath);
    }
 
    /**
     * Returns information about image,
     * information is determined from the file content
     *
     * @return mixed array with width, height and mimetype; false if not an image
     */
    public function get_imageinfo() {
        return $this->filesystem->get_imageinfo($this);
    }
 
    /**
     * Verifies the file is a valid web image - gif, png and jpeg only.
     *
     * It should be ok to serve this image from server without any other security workarounds.
     *
     * @return bool true if file ok
     */
    public function is_valid_image() {
        $mimetype = $this->get_mimetype();
        if (!file_mimetype_in_typegroup($mimetype, 'web_image')) {
            return false;
        }
        if (!$info = $this->get_imageinfo()) {
            return false;
        }
        if ($info['mimetype'] !== $mimetype) {
            return false;
        }

     *
     * @return mixed array with width, height and mimetype; false if not an image
     */
    public function get_imageinfo() {
        return $this->filesystem->get_imageinfo($this);
    }
 
    /**
     * Verifies the file is a valid web image - gif, png and jpeg only.
     *
     * It should be ok to serve this image from server without any other security workarounds.
     *
     * @return bool true if file ok
     */
    public function is_valid_image() {
        $mimetype = $this->get_mimetype();
        if (!file_mimetype_in_typegroup($mimetype, 'web_image')) {
            return false;
        }
        if (!$info = $this->get_imageinfo()) {
            return false;
        }
        if ($info['mimetype'] !== $mimetype) {
            return false;
        }
        // ok, GD likes this image
        return true;
    }
 
    /**
     * Returns parent directory, creates missing parents if needed.
     *
     * @return stored_file
     */
    public function get_parent_directory() {
        if ($this->file_record->filepath === '/' and $this->file_record->filename === '.') {
            //root dir does not have parent
            return null;
        }
 

                );
                $content .= html_writer::tag('li', $name);
            }
            $content .= html_writer::end_tag('ul');
        }
        return $content;
    }
 
    /**
     * Returns HTML to display course overview files.
     *
     * @param core_course_list_element $course
     * @return string
     */
    protected function course_overview_files(core_course_list_element $course): string {
        global $CFG;
 
        $contentimages = $contentfiles = '';
        foreach ($course->get_course_overviewfiles() as $file) {
            $isimage = $file->is_valid_image();
            $url = moodle_url::make_file_url("$CFG->wwwroot/pluginfile.php",
                '/' . $file->get_contextid() . '/' . $file->get_component() . '/' .
                $file->get_filearea() . $file->get_filepath() . $file->get_filename(), !$isimage);
            if ($isimage) {
                $contentimages .= html_writer::tag('div',
                    html_writer::empty_tag('img', ['src' => $url, 'alt' => '']),
                    ['class' => 'courseimage']);
            } else {
                $image = $this->output->pix_icon(file_file_icon($file), $file->get_filename(), 'moodle');
                $filename = html_writer::tag('span', $image, ['class' => 'fp-icon']).
                    html_writer::tag('span', $file->get_filename(), ['class' => 'fp-filename']);
                $contentfiles .= html_writer::tag('span',
                    html_writer::link($url, $filename),
                    ['class' => 'coursefile fp-filename-icon text-break']);
            }
        }
        return $contentimages . $contentfiles;
    }
 
    /**

    }
 
    /**
     * Returns HTML to display course content (summary, course contacts and optionally category name)
     *
     * This method is called from coursecat_coursebox() and may be re-used in AJAX
     *
     * @param coursecat_helper $chelper various display options
     * @param stdClass|core_course_list_element $course
     * @return string
     */
    protected function coursecat_coursebox_content(coursecat_helper $chelper, $course) {
        if ($chelper->get_show_courses() < self::COURSECAT_SHOW_COURSES_EXPANDED) {
            return '';
        }
        if ($course instanceof stdClass) {
            $course = new core_course_list_element($course);
        }
        $content = \html_writer::start_tag('div', ['class' => 'd-flex']);
        $content .= $this->course_overview_files($course);
        $content .= \html_writer::start_tag('div', ['class' => 'flex-grow-1']);
        $content .= $this->course_summary($chelper, $course);
        $content .= $this->course_contacts($course);
        $content .= $this->course_category_name($chelper, $course);
        $content .= $this->course_custom_fields($course);
        $content .= \html_writer::end_tag('div');
        $content .= \html_writer::end_tag('div');
        return $content;
    }
 
    /**
     * Renders the list of courses
     *
     * This is internal function, please use {@link core_course_renderer::courses_list()} or another public
     * method from outside of the class
     *
     * If list of courses is specified in $courses; the argument $chelper is only used
     * to retrieve display options and attributes, only methods get_show_courses(),
     * get_courses_display_option() and get_and_erase_attributes() are called.
     *

        $content = '';
        $classes = trim('coursebox clearfix '. $additionalclasses);
        if ($chelper->get_show_courses() < self::COURSECAT_SHOW_COURSES_EXPANDED) {
            $classes .= ' collapsed';
        }
 
        // .coursebox
        $content .= html_writer::start_tag('div', array(
            'class' => $classes,
            'data-courseid' => $course->id,
            'data-type' => self::COURSECAT_TYPE_COURSE,
        ));
 
        $content .= html_writer::start_tag('div', array('class' => 'info'));
        $content .= $this->course_name($chelper, $course);
        $content .= $this->course_enrolment_icons($course);
        $content .= html_writer::end_tag('div');
 
        $content .= html_writer::start_tag('div', array('class' => 'content'));
        $content .= $this->coursecat_coursebox_content($chelper, $course);
        $content .= html_writer::end_tag('div');
 
        $content .= html_writer::end_tag('div'); // .coursebox
        return $content;
    }
 
    /**
     * Returns HTML to display course summary.
     *
     * @param coursecat_helper $chelper
     * @param core_course_list_element $course
     * @return string
     */
    protected function course_summary(coursecat_helper $chelper, core_course_list_element $course): string {
        $content = '';
        if ($course->has_summary()) {
            $content .= html_writer::start_tag('div', ['class' => 'summary']);
            $content .= $chelper->get_course_formatted_summary($course,
                array('overflowdiv' => true, 'noclean' => true, 'para' => false));
            $content .= html_writer::end_tag('div');

     * @param string $target
     */
    public function __construct(moodle_page $page, $target) {
        $this->strings = new stdClass;
        $courseid = $page->course->id;
        parent::__construct($page, $target);
    }
 
    /**
     * Renders course info box.
     *
     * @param stdClass $course
     * @return string
     */
    public function course_info_box(stdClass $course) {
        $content = '';
        $content .= $this->output->box_start('generalbox info');
        $chelper = new coursecat_helper();
        $chelper->set_show_courses(self::COURSECAT_SHOW_COURSES_EXPANDED);
        $content .= $this->coursecat_coursebox($chelper, $course);
        $content .= $this->output->box_end();
        return $content;
    }
 
    /**
     * Renders course info box.
     *
     * @param stdClass $course course object
     * @param string[] $widgets array of enrolment widgets
     * @param \core\url|null $returnurl return url
     * @return string
     */
    public function enrolment_options(stdClass $course, array $widgets, ?\core\url $returnurl = null): string {
        if (!$widgets) {
            if (isguestuser()) {
                $message = get_string('noguestaccess', 'enrol');
                $continuebutton = $this->output->continue_button(get_login_url());
            } else if ($returnurl) {
                $message = get_string('notenrollable', 'enrol');
                $continuebutton = $this->output->continue_button($returnurl);

    $PAGE->set_url('/course/info.php', array('id' => $course->id));
 
    $strcourseinfo = get_string('courseinfo');
    $PAGE->set_title(implode(moodle_page::TITLE_SEPARATOR, [$strcourseinfo, $course->fullname]));
    $PAGE->set_heading($strcourseinfo);
 
    $PAGE->navbar->add(get_string('summary'));
 
    echo $OUTPUT->header();
 
    // print enrol info
    if ($texts = enrol_get_course_description_texts($course)) {
        echo $OUTPUT->box_start('generalbox icons');
        echo implode($texts);
        echo $OUTPUT->box_end();
    }
 
    /** @var core_course_renderer $courserenderer */
    $courserenderer = $PAGE->get_renderer('core', 'course');
    echo $courserenderer->course_info_box($course);
 
    echo "<br />";
 
    // Trigger event, course information viewed.
    $eventparams = array('context' => $context, 'objectid' => $course->id);
    $event = \core\event\course_information_viewed::create($eventparams);
    $event->trigger();
 
    echo $OUTPUT->footer();