/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "txXMLParser.h"
#include "txURIUtils.h"
#include "txXPathTreeWalker.h"

#include "nsIDocument.h"
#include "nsIDOMDocument.h"
#include "nsSyncLoadService.h"
#include "nsNetUtil.h"
#include "nsIURI.h"
#include "nsIPrincipal.h"

nsresult
txParseDocumentFromURI(nsIURI* aUri,
                       nsIDocument* aLoadingDocument,
                       nsAString& aErrMsg,
                       txXPathNode** aResult)
{
    *aResult = nullptr;

    nsCOMPtr<nsILoadGroup> loadGroup = aLoadingDocument->GetDocumentLoadGroup();

    // For the system principal loaderUri will be null here, which is good
    // since that means that chrome documents can load any uri.

    // Raw pointer, we want the resulting txXPathNode to hold a reference to
    // the document.
    nsIDOMDocument* theDocument = nullptr;
    nsAutoSyncOperation sync(aLoadingDocument);
    nsresult rv =
        nsSyncLoadService::LoadDocument(aUri,
                                        nsIContentPolicy::TYPE_INTERNAL_XMLHTTPREQUEST,
                                        aLoadingDocument->NodePrincipal(),
                                        nsILoadInfo::SEC_REQUIRE_CORS_DATA_INHERITS,
                                        loadGroup,
                                        true,
                                        aLoadingDocument->GetReferrerPolicy(),
                                        &theDocument);

    if (NS_FAILED(rv)) {
        aErrMsg.AppendLiteral("Document load of ");
        nsAutoCString spec;
        aUri->GetSpec(spec);
        aErrMsg.Append(NS_ConvertUTF8toUTF16(spec));
        aErrMsg.AppendLiteral(" failed.");
        return rv;
    }

    *aResult = txXPathNativeNode::createXPathNode(theDocument);
    if (!*aResult) {
        NS_RELEASE(theDocument);
        return NS_ERROR_FAILURE;
    }

    return NS_OK;
}