/**
* Whether this folder may be skipped in folder hierarchy
*
* 1. Skip the name of a single filearea in a module
* 2. Skip course categories for non-admins who do not have navshowmycoursecategories setting
*
* @param file_info $fileinfo
* @param string|array $extensions, for example '*' or array('.gif','.jpg')
* @param file_info|int $parent specify parent here if we know it to avoid creating extra objects
* @return bool
*/
private function can_skip(file_info $fileinfo, $extensions, $parent = -1)
{
global $CFG;
if (!$fileinfo->is_directory()) {
// do not skip files
return false;
}
if ($fileinfo instanceof file_info_context_coursecat) {
// This is a course category. For non-admins we do not display categories
return empty($CFG->navshowmycoursecategories) && !has_capability('moodle/course:update', context_system::instance());
} else {
if ($fileinfo instanceof file_info_context_course || $fileinfo instanceof file_info_context_user || $fileinfo instanceof file_info_area_course_legacy || $fileinfo instanceof file_info_context_module || $fileinfo instanceof file_info_context_system) {
// these instances can never be filearea inside an activity, they will never be skipped
return false;
} else {
$params = $fileinfo->get_params();
if (strlen($params['filearea']) && ($params['filepath'] === '/' || empty($params['filepath'])) && ($params['filename'] === '.' || empty($params['filename'])) && context::instance_by_id($params['contextid'])->contextlevel == CONTEXT_MODULE) {
if ($parent === -1) {
$parent = $fileinfo->get_parent();
}
// This is a filearea inside an activity, it can be skipped if it has no non-empty siblings
if ($parent && $parent instanceof file_info_context_module) {
if ($parent->count_non_empty_children($extensions, 2) <= 1) {
return true;
}
}
}
}
}
return false;
}
/**
* Constructor of moodle_file_tree_viewer class
* @param file_info $file_info
* @param array $options
*/
public function __construct(file_info $file_info, array $options = null)
{
global $CFG;
//note: this MUST NOT use get_file_storage() !!!!!!!!!!!!!!!!!!!!!!!!!!!!
$this->options = (array) $options;
$this->context = $options['context'];
$this->tree = array();
$children = $file_info->get_children();
$current_file_params = $file_info->get_params();
$parent_info = $file_info->get_parent();
$level = $parent_info;
$this->path = array();
while ($level) {
$params = $level->get_params();
$context = context::instance_by_id($params['contextid']);
// $this->context is current context
if ($context->id != $this->context->id or empty($params['filearea'])) {
break;
}
// unset unused parameters
unset($params['component']);
unset($params['filearea']);
unset($params['filename']);
unset($params['itemid']);
$url = new moodle_url('/files/index.php', $params);
$this->path[] = html_writer::link($url, $level->get_visible_name());
$level = $level->get_parent();
}
$this->path = array_reverse($this->path);
if ($current_file_params['filepath'] != '/') {
$this->path[] = $file_info->get_visible_name();
}
foreach ($children as $child) {
$filedate = $child->get_timemodified();
$filesize = $child->get_filesize();
$mimetype = $child->get_mimetype();
$params = $child->get_params();
unset($params['component']);
unset($params['filearea']);
unset($params['filename']);
unset($params['itemid']);
$fileitem = array('params' => $params, 'filename' => $child->get_visible_name(), 'mimetype' => $child->get_mimetype(), 'filedate' => $filedate ? $filedate : '', 'filesize' => $filesize ? $filesize : '');
$url = new moodle_url('/files/index.php', $params);
if ($child->is_directory()) {
$fileitem['isdir'] = true;
$fileitem['url'] = $url->out(false);
} else {
$fileitem['url'] = $child->get_url();
}
$this->tree[] = $fileitem;
}
}
