<?php
/**
 * More granular outline node insertion / creation operations, as well as 
 * browser UI operations.
 */
global $key, $selector, $driver, $XHTML_NS;
xoxoioInit();

if ($driver->store->isCollection($key)) {
    // TODO: Post a new document to a collection
    return $driver->showErrorTextResponse(501, 
        "Posting to a collection not yet supported.");
} else {

    // Attempt to fetch an existing document at this key.
    list($orig_doc, $orig_root_node) = fetchOutlineWithSelector($key, $selector);

    // The mode parameter specifies a variety of UI actions.
    $mode = isset($_REQUEST['mode']) ? $_REQUEST['mode'] : '';
    switch($mode) {

        case 'append':
            
            // TODO: Should this even be in xoxoio.php?

            $type = isset($_REQUEST['type']) ? $_REQUEST['type'] : '';
            switch($type) {

                case 'xml':
                    $data = $_POST['data'];
                    // HACK: Ensure that the submitted XML is wrapped with an <li>
                    if (!startsWith($data, '<li')) $data = "<li>$data</li>";
                    list($raw_doc, $new_root_node) = fetchRequestDataAsOutline($data);
                    $new_item = $orig_doc->importNode($new_root_node, TRUE);
                    break;

                case 'text':
                default:
                    $new_item = $orig_doc->createElementNS($XHTML_NS, 'li');
                    $new_span = $orig_doc->createElementNS($XHTML_NS, 'div');
                    $new_span->appendChild($orig_doc->createTextNode($_POST['data']));
                    $new_item->appendChild($new_span);
                    break;

            }

            $ol_parent = getOutlineItemContainerNode($orig_doc, $orig_root_node);
            $ol_parent->appendChild($new_item);
            break;

        default:
            if (!$selector) {
                // TODO: Posting to root of outline, not sure what to do yet.
                return $driver->showErrorTextResponse(501, 
                    "Posting to outline root not yet supported.");
            } else {

                // Parse and sanitize new incoming data, grab the root node.
                list($raw_doc, $new_root_node) = fetchRequestDataAsOutline();

                // New document data without selector must be 'html'. 
                if ($new_root_node->tagName != 'li') {
                    return $driver->showErrorTextResponse(415, "Outline node type must be 'li'.");
                }

                $new_import_node = $orig_doc->importNode($new_root_node, TRUE);
                $ol_parent = getOutlineItemContainerNode($orig_doc, $orig_root_node);
                $ol_parent->appendChild($new_import_node);

            }
            break;

    }
            
    // Attempt to store the modified document.
    if (FALSE !== $driver->store->put($key, $orig_doc->saveXML())) {
        header("Location: ".$driver->config['BASE_URL'].'/outlines'.$key.";".$selector);
        return;
    } else {
        return $driver->showErrorTextResponse(403, "Outline save failed.");
    }
    return;
    
}
?>