Attempt to fix #15: Fix AASX files of old version

src/Program.cs

@@ -84,6 +84,8 @@ private void Run(string inputFileName, string outputFileName, bool unfix)
  new RelationshipFixer().Fix(package, _fixes);
  new RelationshipDefinitionFixer().Fix(package, _fixes);
  new ExternalReferenceFixer(package).Fix();
+ new VersionFixer(package).Fix();
+
 
  // DisplayContentsForDebuggingPurposes(package);
  package.Flush();
@@ -118,6 +120,9 @@ private static void PrintUsage()
  Console.WriteLine("Fixes the external reference issue (bug #681) in an AASX file.");
  Console.WriteLine("This will only be done one-way, since Package Explorer can open fixed files.");
  Console.WriteLine();
+ Console.WriteLine("Brings files from AASX version 1 to AASX version 3 by converting XML documents to the new namespace.");
+ Console.WriteLine("This will only be done one-way, since Package Explorer can open fixed files.");
+ Console.WriteLine();
  Console.WriteLine("Usage: AASFix <input file name> <output file name> [--fix|--unfix]");
  Console.WriteLine(" <input file name> : source file for reading");
  Console.WriteLine(" <output file name>: destination file for writing");

src/RelationshipDefinitionFixer.cs

@@ -61,6 +61,7 @@ private void FixDefinitionInXml(XDocument xml, List<Fix> fixes)
  private void SaveXml(PackagePart part, XDocument xml)
  {
  using var stream = part.GetStream(FileMode.Open, FileAccess.Write);
+ stream.SetLength(0);
  xml.Save(stream);
  }
  }

src/VersionFixer.cs

@@ -0,0 +1,109 @@
+// Copyright 2023 Lukas Benner, Thomas Weller
+// 
+// Licensed 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.IO.Packaging;
+using System.Xml;
+using System.Xml.Linq;
+using System.Xml.XPath;
+
+namespace AASFix
+{
+ internal class VersionFixer
+ {
+ private readonly PackagePartCollection _parts;
+ private readonly XmlNamespaceManager _nsMgr = new(new NameTable());
+ private readonly XNamespace _version3 = "https://admin-shell.io/aas/3/0";
+ private readonly string _oldVersionNodesQuery;
+ private readonly List<string> _oldVersions = new()
+ {
+ "https://admin-shell.io/aas/1/0",
+ "http://www.admin-shell.io/aas/1/0",
+ "https://www.admin-shell.io/aas/1/0",
+ "https://admin-shell.io/aas/2/0",
+ "http://www.admin-shell.io/aas/2/0",
+ "https://www.admin-shell.io/aas/2/0"
+ };
+
+ internal VersionFixer(Package package)
+ {
+ _parts = package.GetParts();
+ _nsMgr.AddNamespace("aas3", "https://admin-shell.io/aas/3/0");
+ _oldVersionNodesQuery = BuildQueryForOldVersions(_nsMgr, _oldVersions);
+ }
+
+ internal void Fix()
+ {
+ var xmlFiles = FindXmlFiles();
+ foreach (var xmlFile in xmlFiles)
+ {
+ var xml = LoadXml(xmlFile);
+ var incorrectNodes = FindIncorrectNodes(xml);
+ FixNamespace(incorrectNodes);
+ SaveXml(xmlFile, xml);
+ }
+ }
+
+ private IEnumerable<PackagePart> FindXmlFiles()
+ {
+ return _parts.Where(p => p.ContentType == "text/xml");
+ }
+
+ private IEnumerable<XElement> FindIncorrectNodes(XDocument xml)
+ {
+ return xml.XPathSelectElements(_oldVersionNodesQuery, _nsMgr);
+ }
+
+ private void FixNamespace(IEnumerable<XElement> incorrectNodes)
+ {
+ if (incorrectNodes.Any())
+ {
+ Console.WriteLine("Converting XML to version 3.");
+ }
+
+ foreach (var node in incorrectNodes)
+ {
+ node.Name = _version3 + node.Name.LocalName;
+ }
+ }
+
+ private string BuildQueryForOldVersions(XmlNamespaceManager nsMgr, List<string> oldVersions)
+ {
+ var queries = new List<string>();
+ var i= 0;
+ foreach (var version in oldVersions)
+ {
+ i++;
+ var prefix = $"old{i}";
+ queries.Add($"//{prefix}:*");
+ nsMgr.AddNamespace(prefix, version);
+ }
+ return string.Join(" | ", queries);
+ }
+
+ private void SaveXml(PackagePart part, XDocument xml)
+ {
+ using var stream = part.GetStream(FileMode.Open, FileAccess.ReadWrite);
+ stream.Seek(0, SeekOrigin.Begin);
+ stream.SetLength(0);
+ xml.Save(stream);
+ }
+
+ private XDocument LoadXml(PackagePart part)
+ {
+ using var stream = part.GetStream(FileMode.Open, FileAccess.ReadWrite);
+ var xml = XDocument.Load(stream);
+ return xml;
+ }
+ }
+}