<?php
/**
 * Replace / create an entire outline, or replace a suboutline.
 */
global $key, $selector, $driver;
xoxoioInit();

// Can't store directly to a collection.  (That's what POST is for.)
if ($driver->store->isCollection($key)) 
    return $driver->show403("Cannot write directly to a collection.");

// TODO: Permissions in OutlineStore object?

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

// Ensure selected suboutline exists, if selector present.
if ($selector && !$orig_doc) {
    return $driver->showErrorTextResponse(400, 
        "Document not found, or suboutline selector invalid for PUT on new document.");
}

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

// Without a selector, this is a request to overwrite entire doc
if (!$selector) {
    
    // New document data without selector must be 'html'. 
    if ($new_root_node->tagName != 'html') {
        return $driver->showErrorTextResponse(415, 
            "Document root node must be 'html', found '".$new_root_node->tagName."'");
    }

    // Attempt to store the sanitized document.
    if (FALSE !== $driver->store->put($key, $new_doc->saveXML())) {
        header("Location: ".$driver->config['BASE_URL'].'/outlines'.$key);
        return;
    } else {
        return $driver->show403('Could not save');
    }

} else {

    // On suboutline update, ensure the original and new root nodes are 
    // the same type.
    if ($orig_root_node->tagName != $new_root_node->tagName) {
        return $driver->showErrorTextResponse(415, 
            "Node name mismatch on suboutline update.\n" .
            "Original: ".$orig_root_node->tagName."\n" .
            "     New: ".$new_root_node->tagName);
        return;
    }

    // Replace the original doc's node with the new one incoming.
    $new_import_node = $orig_doc->importNode($new_root_node, TRUE);
    $orig_root_node->parentNode->replaceChild($new_import_node, $orig_root_node);

    // 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->show403();
    }

}
?>