wasStitchNET – Rev 8
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///////////////////////////////////////////////////////////////////////////
// Copyright (C) Wizardry and Steamworks 2017 - License: GNU GPLv3 //
// Please see: http://www.gnu.org/licenses/gpl.html for legal details, //
// rights of fair usage, the disclaimer and warranty conditions. //
///////////////////////////////////////////////////////////////////////////
using System.Collections.Generic;
using System.Linq;
using System.Xml.Linq;
using System.Xml.XPath;
namespace wasStitchNET.Patchers
{
public static class XML
{
public static HashSet<string> GetFileDelta(string cfg, string nfg)
{
var configuredTags = new HashSet<string>();
var configuration = XDocument.Load(cfg);
foreach (var e in XDocument.Load(nfg).Descendants())
{
var cfgElement = configuration.XPathSelectElement(e.GetAbsoluteXPath());
if (cfgElement == null)
{
configuredTags.Add(e.Name.LocalName);
continue;
}
if (e.Descendants().Any())
continue;
if (!cfgElement.Value.Equals(e.Value))
continue;
configuredTags.Add(e.Name.LocalName);
}
return configuredTags;
}
public static XDocument PatchXDocument(XDocument cfg, XDocument nfg, HashSet<string> configuredTags)
{
foreach (var e in nfg.Descendants()
.Where(e => configuredTags.Contains(e.Name.LocalName)))
{
// Select the element in the current configuration that is found in the default configuration.
var cfgElement = cfg.XPathSelectElement(e.GetAbsoluteXPath());
switch (cfgElement != null)
{
// Element found in current configuration.
case true:
// Only set the element value if it has no descendants.
if (!cfgElement.Descendants().Any())
cfgElement.Value = e.Value;
break;
// Element not found in the current configuration.
default:
// Find the first existing parent of the default configuration in the current configuration.
var parent = e;
do
{
var cfgParentElement = cfg.XPathSelectElement(parent.GetAbsoluteXPath());
if (cfgParentElement != null)
{
// Add the default configuration parent to the current configuration.
cfgParentElement.ReplaceWith(
nfg.XPathSelectElement(cfgParentElement.GetAbsoluteXPath()));
break;
}
parent = parent.Parent;
} while (parent != null);
break;
}
}
return cfg;
}
}
}
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