Moodle in English: Accessing a picture uploaded through a filepicker in global plugin's settings on the view page

Re: Accessing a picture uploaded through a filepicker in global plugin's settings on the view page

by Artem Kobylin - Monday, 4 April 2022, 2:53 PM

Hello Davo

Thank you for your reply. Doing further research I came across the local plugin "Filemanager", development of that you have supported. I got through the plugin's code and found the local_filemanager_pluginfile() function there, which manages the access to plugin files. I think, I got the idea of the concept, and it worked, when I implemented it in my code.
I am writing here the changes I made and hope that this topic will help others.

Thanks again Davo for your help

.

I attached a screenshot of mdl_files with new records with the right component.

I made following changes in the code:

--- settings.php:

$setting = new admin_setting_configstoredfile(
'mod_facetoface/facetoface_email_signature_img',
get_string('setting:emailsignatureimg', 'facetoface'),
get_string('setting:emailsignatureimg_caption', 'facetoface'),
'signature_image',
0,
['maxfiles' => 1, 'accepted_types' => ['.jpg', '.png', '.svg']]
);
$setting->set_updatedcallback('theme_reset_all_caches');
$settings->add($setting);

--- lib.php:

function mod_facetoface_pluginfile($course, $cm, $context, $filearea, $args, $forcedownload, array $options=array()) {
    global $DB;

    if ($context->contextlevel != CONTEXT_SYSTEM) {
        return false;
    }

    // No require_login(), because users getting a email notification
    // are not logged in

    if ($filearea != 'signature_image') {
        return false;
    }

    $itemid = (int)array_shift($args);

    if ($itemid != 0) {
        return false;
    }

    $fs = get_file_storage();

    $filename = array_pop($args);
    if (empty($args)) {
        $filepath = '/';
    } else {
        $filepath = '/'.implode('/', $args).'/';
    }

    $file = $fs->get_file($context->id, 'mod_facetoface', $filearea, $itemid, $filepath, $filename);
    if (!$file) {
        return false;
    }

    // finally send the file
    send_stored_file($file, 0, 0, true, $options); // download MUST be forced - security!
}

--- test.php:

require_once(dirname(__FILE__, 3) . '/config.php');

global $OUTPUT;
$systemcontext = context_system::instance();
$fs = get_file_storage();

if ($files = $fs->get_area_files($systemcontext->id, 'mod_facetoface', 'signature_image')) {
    foreach ($files as $file) {
        if ($file->is_directory()) continue;

        $fileurl = moodle_url::make_pluginfile_url(
            $file->get_contextid(),
            $file->get_component(),
            $file->get_filearea(),
            $file->get_itemid(),
            $file->get_filepath(),
            $file->get_filename()
        );
        $img = html_writer::img($fileurl, 'test');
        echo $img;
    }
}