<?php
/**
 * Fetch an outline collection, entire outline, or a selected suboutline.
 */
global $XHTML_NS, $key, $selector, $driver;
xoxoioInit();

// From here on out, only handle existing keys in the OutlineStore.
if (FALSE == $key) return $driver->show404(); 

// Grab the format switch option from the URL parameters.
$format = isset($_GET['format']) ? $_GET['format'] : '';

if ($driver->store->isCollection($key)) {

    // Fetch the resource collection list from the store.
    $items = $driver->store->listCollection($key);

    switch($format) {

        case 'json':
            echo $driver->echoJSON($items);
            return;

        default:
            $driver->tpl->assign('items', $items);
            $driver->tpl->display('collection_view.tpl.php');
            return;

    }

} elseif ($driver->store->isResource($key)) {

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

    if (!$orig_doc) return $driver->show404();
    $etag = buildEtagForOutlineNode($orig_doc, $orig_root_node);
    header("Etag: $etag");

    if ($selector && (!$orig_root_node->getAttribute('xmlns') == $XHTML_NS) )
        $orig_root_node->setAttribute('xmlns', $XHTML_NS);

    switch($format) {

        case 'raw':
        case 'xoxo':
            // Spit out the raw document source.
            // header("Content-Type: text/xml; charset=utf8");
            header("Content-Type: application/xhtml+xml; charset=utf8");
            echo $orig_doc->saveXML($orig_root_node);
            return;

        case 'json':
            header("Content-Type: application/javascript; charset=utf8");
            $bf = new BadgerFish();
            echo $bf->encode($orig_doc);
            return;

        case 'opml':
            header("Content-Type: text/x-opml; charset=utf8");
            # HACK: Serializing to XML, just to be re-parsed in applyXSLT() sucks.
            echo $driver->applyXSLT('xoxo-to-opml.xsl', $orig_doc->saveXML($orig_root_node), array( 
                "key" => $key, "selector" => $selector, "etag" => $etag
            )); 
            return;

        case 'noop':

            /*
            */
            echo $driver->applyXSLT('noop.xsl', $orig_doc, array( )); 
            return;

            $xml = $orig_doc; // file_get_contents($xml_url);
            $xsl = file_get_contents('xsl/noop.xsl');
            
            $xslt = new xsltProcessor;
            $xslt->importStyleSheet(DomDocument::loadXML($xsl));
            foreach ($_GET as $param => $value) {
                $xslt->setParameter('', $param, $value);
            }
            $xslt_result = $xslt->transformToXML($xml);

            $result = $xslt_result;

            echo $result;
            return;

        default:
            // Default format includes a variety of UI modes.
            $mode = isset($_GET['mode']) ? $_GET['mode'] : '';
            switch($mode) {

                case 'append':
                    // TODO: Should this even be in xoxoio.php?
                    $driver->tpl->assign('key', $key);
                    $driver->tpl->assign('selector', $selector);
                    $driver->tpl->display('append-item-form.tpl.php');
                    return;

                default:
                    // Output the document instrumented with outliner 
                    // machinery via XSL.
                    header("Content-Type: text/html; charset=utf8");
                    # HACK: Serializing to XML, just to be re-parsed in applyXSLT() sucks.
                    echo $driver->applyXSLT('inject-outliner.xsl', $orig_doc->saveXML($orig_root_node), array( 
                        "key" => $key , "selector" => $selector, "etag" => $etag
                    )); 
                    return;

            }

    }

} else {

    // Report that this key was not found in the store.
    return $driver->show404();

}
?>