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149 lines (126 loc) · 4.64 KB
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// Copyright (c) rubicon IT GmbH, www.rubicon.eu
//
// See the NOTICE file distributed with this work for additional information
// regarding copyright ownership. rubicon licenses this file to you under
// the Apache License, Version 2.0 (the "License"); you may not use this
// file except in compliance with the License. You may obtain a copy of the
// License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations
// under the License.
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Xml.Linq;
using System.Xml.XPath;
using Nuke.Common.IO;
namespace Remotion.BuildScript;
public class AppConfig
{
public static AppConfig FromText (string text, params (string prefix, string uri)[] namespaces)
{
var xDocument = XDocument.Parse(text);
return new AppConfig(xDocument, CreateXmlNamespaceManager(xDocument, namespaces));
}
public static AppConfig Read (AbsolutePath path, params (string prefix, string uri)[] namespaces)
{
var xDocument = XDocument.Load(path);
return new AppConfig(xDocument, CreateXmlNamespaceManager(xDocument, namespaces));
}
private static XmlNamespaceManager? CreateXmlNamespaceManager (XDocument xDocument, (string prefix, string uri)[] namespaces)
{
XmlNamespaceManager? xmlNamespaceManager = null;
if (namespaces?.Length > 0)
{
var reader = xDocument.CreateReader();
if (reader.NameTable != null)
{
xmlNamespaceManager = new XmlNamespaceManager(reader.NameTable);
foreach (var (prefix, uri) in namespaces)
xmlNamespaceManager.AddNamespace(prefix, uri);
}
}
return xmlNamespaceManager;
}
private readonly XDocument _xDocument;
private readonly XmlNamespaceManager? _xmlNamespaceManager;
public AppConfig (XDocument xDocument, XmlNamespaceManager? xmlNamespaceManager)
{
_xDocument = xDocument;
_xmlNamespaceManager = xmlNamespaceManager;
}
public string? GetAppSetting (string key)
{
var attribute = (XAttribute?) EvaluateXPathSingleOrDefault($"/configuration/appSettings/add[@key='{key}']/@value");
return attribute?.Value;
}
public void SetAppSetting (string key, string value)
{
var attribute = (XAttribute?) EvaluateXPathSingleOrDefault($"/configuration/appSettings/add[@key='{key}']/@value");
if (attribute != null)
{
attribute.Value = value;
}
else
{
var appSettingsElement = (XElement) EvaluateXPathSingle("/configuration/appSettings");
var newEntry = new XElement("add");
newEntry.SetAttributeValue("key", key);
newEntry.SetAttributeValue("value", value);
appSettingsElement.Add(newEntry);
}
}
public string? GetAttribute (string xPath, string attribute)
{
var element = (XElement?) EvaluateXPathSingleOrDefault(xPath);
return element?.Attribute(attribute)?.Value;
}
public void SetOrAddAttribute (string xPath, string attribute, string value)
{
var xElement = (XElement) EvaluateXPathSingle(xPath);
var xAttribute = xElement.Attribute(attribute);
if (xAttribute != null)
{
xAttribute.Value = value;
}
else
{
var newXAttribute = new XAttribute(attribute, value);
xElement.Add(newXAttribute);
}
}
public void WriteToFile (AbsolutePath absolutePath)
{
var writerSettings = new XmlWriterSettings { OmitXmlDeclaration = _xDocument.Declaration == null, Encoding = Encoding.UTF8 };
using var xmlWriter = XmlWriter.Create(absolutePath, writerSettings);
_xDocument.Save(xmlWriter);
}
private XObject? EvaluateXPathSingleOrDefault (string xPath)
{
var results = EvaluateXPath(xPath).ToList();
if (results.Count > 1)
throw new InvalidOperationException($"XPath expression '{xPath}' returned {results.Count} elements but 0 or 1 were expected.");
return results.Count > 0
? results[0]
: null;
}
private XObject EvaluateXPathSingle (string xPath)
{
var results = EvaluateXPath(xPath).ToList();
if (results.Count != 1)
throw new InvalidOperationException($"XPath expression '{xPath}' returned {results.Count} elements but exactly 1 was expected.");
return results[0];
}
private IEnumerable<XObject> EvaluateXPath (string xPath)
{
return ((IEnumerable) _xDocument.XPathEvaluate(xPath, _xmlNamespaceManager)).Cast<XObject>().ToList();
}
}