shimmie2/ext/bulk_add/theme.php

<?php declare(strict_types=1);

class BulkAddTheme extends Themelet
{
    private array $messages = [];

    /*
     * Show a standard page for results to be put into
     */
    public function display_upload_results(Page $page)
    {
        $page->set_title("Adding folder");
        $page->set_heading("Adding folder");
        $page->add_block(new NavBlock());
        $html = "";
        foreach ($this->messages as $block) {
            $html .= "<br/>" . $block->body;
        }
        $page->add_block(new Block("Results", $html));
    }

    /*
     * Add a section to the admin page. This should contain a form which
     * links to bulk_add with POST[dir] set to the name of a server-side
     * directory full of images
     */
    public function display_admin_block()
    {
        global $page;
        $html = "
			Add a folder full of images; any subfolders will have their names
			used as tags for the images within.
			<br>Note: this is the folder as seen by the server -- you need to
			upload via FTP or something first.

			<p>".make_form(make_link("bulk_add"))."
				<table class='form'>
					<tr><th>Folder</th><td><input type='text' name='dir' size='40'></td></tr>
					<tr><td colspan='2'><input type='submit' value='Add'></td></tr>
				</table>
			</form>
		";
        $page->add_block(new Block("Bulk Add", $html));
    }

    public function add_status($title, $body)
    {
        $this->messages[] = new Block($title, $body);
    }
}