how to retrieve files when editing a file manager in moodle - php

Question

I am currently doing an internship and I tried to make an activity module to show playlist, from video given by a filemanager. I succeed to send the video to the database but when I want to edit my module, it doesn't show any videos in the filemanager.
I read the moodle documentation about file API and I decided to use the following code (Load existing files into draft area)
:
if (empty($entry->id)) {
$entry = new stdClass;
$entry->id = null;
}
$draftitemid = file_get_submitted_draft_itemid('attachments');
file_prepare_draft_area($draftitemid, $context->id, 'mod_glossary','attachment', $entry->id,array('subdirs' => 0, 'maxbytes' => $maxbytes, 'maxfiles' => 50));
$entry->attachments = $draftitemid;
$mform->set_data($entry);
So I put the following lines in my mod_form.php :
$filemanager_options = array();
$filemanager_options['accepted_types'] = '*';
$filemanager_options['maxbytes'] = 0;
$filemanager_options['maxfiles'] = -1;
$filemanager_options['mainfile'] = true;
$mform->addElement('filemanager', 'files', get_string('selectfiles'), null, $filemanager_options);
if (empty($entry->id)) {
$entry = new stdClass;
$entry->id = null;
}
$draftitemid = file_get_submitted_draft_itemid('mymanager');
file_prepare_draft_area($draftitemid, $this->context->id, 'mod_playlist', 'content', 0,
array('subdirs'=>true));
$entry->attachments = $draftitemid;
$mform->set_data($entry);
The problem is that the file manager is still empty, and the line "$mform->set_data($entry); " makes the page to crash(blank).

Answer 1

Here is a template for uploading files.
In local/myplugin/upload.php
require_once(dirname(dirname(dirname(__FILE__))) . '/config.php');
require_once(dirname(__FILE__) . '/upload_form.php');
require_login();
$context = context_system::instance();
require_capability('local/myplugin:upload', $context);
$pageurl = new moodle_url('/local/myplugin/upload.php');
$heading = get_string('myupload', 'local_myplugin');
$PAGE->set_context($context);
$PAGE->set_heading(format_string($heading));
$PAGE->set_title(format_string($heading));
$PAGE->set_url('/local/myplugin/upload.php');
echo $OUTPUT->header();
echo $OUTPUT->heading($heading);
$fileoptions = array(
'maxbytes' => 0,
'maxfiles' => '1',
'subdirs' => 0,
'context' => context_system::instance()
);
$data = new stdClass();
$data = file_prepare_standard_filemanager($data, 'myfiles',
$fileoptions, context_system::instance(), 'local_myplugin', 'myfiles', 0); // 0 is the item id.
$mform = new upload_form(
null,
array(
'fileoptions' => $fileoptions,
)
);
if ($formdata = $mform->get_data()) {
// Save the file.
$data = file_postupdate_standard_filemanager($data, 'myfiles',
$fileoptions, context_system::instance(), 'local_myplugin', 'myfiles', 0);
} else {
// Display the form.
$mform->set_data($data);
$mform->display();
}
echo $OUTPUT->footer();
Then in local/myplugin/upload_form.php
defined('MOODLE_INTERNAL') || die;
require_once($CFG->libdir . '/formslib.php');
class upload_form extends moodleform {
public function definition() {
$mform =& $this->_form;
$fileoptions = $this->_customdata['fileoptions'];
$mform->addElement('filemanager', 'myfiles_filemanager',
get_string('myfiles', 'local_myplugin'), null, $fileoptions);
$this->add_action_buttons(false, get_string('save', 'local_myplugin'));
}
}
You will also need this in /local/myplugin/lib.php
function local_myplugin_pluginfile($course, $cm, $context, $filearea, $args, $forcedownload, array $options = array()) {
if ($context->contextlevel != CONTEXT_SYSTEM) {
send_file_not_found();
}
$fs = get_file_storage();
$file = $fs->get_file($context->id, 'local_myplugin', $filearea, $args[0], '/', $args[1]);
send_stored_file($file);
}