Results of SyntaxCheck -> extra State

HaWeb/Controllers/XMLStateController.cs

@@ -13,12 +13,10 @@ public class XMLStateController : Controller {
     private IHaDocumentWrappper _lib;
     private readonly IXMLInteractionService _xmlService;
     private readonly IXMLFileProvider _xmlProvider;
-    private readonly IMonitorLoop _loop;  
+    public XMLStateController(IHaDocumentWrappper lib, IXMLInteractionService xmlService, IXMLFileProvider xmlProvider) {
-    public XMLStateController(IMonitorLoop loop, IHaDocumentWrappper lib, IXMLInteractionService xmlService, IXMLFileProvider xmlProvider) {
         _lib = lib;
         _xmlService = xmlService;
         _xmlProvider = xmlProvider;
-        _loop = loop;
     }
 
     [HttpGet]
@@ -26,7 +24,6 @@ public class XMLStateController : Controller {
     [FeatureGate(Features.AdminService)]
     [GenerateAntiforgeryTokenCookie]
     public IActionResult Index() {
-        _loop.StartMonitorLoop();
         var library = _lib.GetLibrary();
         var roots = _xmlService.GetRootsList();
         if (roots == null) return error404();
@@ -39,6 +36,7 @@ public class XMLStateController : Controller {
 
         var model = new XMLStateViewModel("Dateiübersicht", gD, roots, hF, mF, vS) {
             ActiveFile = activeF,
+            SyntaxCheck = _xmlService.Test()
         };
         return View("~/Views/Admin/Dynamic/XMLState.cshtml", model);
     }

HaWeb/FileHelpers/ConfigurationMonitor.cs

@@ -4,10 +4,12 @@ namespace HaWeb.FileHelpers;
 
 public class ConfigurationMonitor {
     private System.Timers.Timer? _timer;
+    private string[] _paths;
     private (string, byte[])[]? _h;
     private IServiceProvider _serviceProvider;
 
     public ConfigurationMonitor(string[] paths, IServiceProvider services) {
+        _paths = paths;
         _h = _getHash(paths);
         _serviceProvider = services;
     }
@@ -33,27 +35,25 @@ public class ConfigurationMonitor {
         return true;
     }
 
-    public void InvokeChanged(string[] paths) {
+    public void InvokeChanged(IHostEnvironment _) {
-        var h = _getHash(paths);
+        var h = _getHash(_paths);
         if (_timer == null && !isEqual(h, _h)) {
             _h = h;
-            _timer = new(5000) { AutoReset = false };
+            _timer = new(8000) { AutoReset = false };
             _timer.Enabled = true;
-            _timer.Elapsed += Action;
+            _timer.Elapsed += OnChanged;
         }
     }
 
-    private void Action(Object source, System.Timers.ElapsedEventArgs e) {
+    private void OnChanged(Object source, System.Timers.ElapsedEventArgs e) {
         Console.WriteLine("Configuration changed (ConfigurationMonitor Class)");
         using IServiceScope serviceScope = _serviceProvider.CreateScope();
         IServiceProvider provider = serviceScope.ServiceProvider;
-
         var cP = provider.GetRequiredService<IConfiguration>();
         var hP = provider.GetRequiredService<IHaDocumentWrappper>();
         hP.ParseConfiguration(cP);
         var fP = provider.GetRequiredService<IXMLFileProvider>();
-        fP.Reload(cP);
+        fP.ParseConfiguration(cP);   
-        
         // _lifetime.StopApplication();
         _timer = null;
     }

HaWeb/FileHelpers/IXMLFileProvider.cs

@@ -10,7 +10,7 @@ public interface IXMLFileProvider {
         public IFileInfo? SaveHamannFile(XElement element, string basefilepath, ModelStateDictionary ModelState);
         public List<IFileInfo>? GetHamannFiles();
         public (DateTime PullTime, string Hash)? GetGitData();
-        public void Reload(IConfiguration config);
+        public void ParseConfiguration(IConfiguration config);
         public bool HasChanged();
         public void DeleteHamannFile(string filename);
         public void Scan();

HaWeb/FileHelpers/XMLFileProvider.cs

@@ -49,19 +49,19 @@ public class XMLFileProvider : IXMLFileProvider {
         }
         _HamannFiles = _ScanHamannFiles();
         
-        // Check if hamann file already is current working tree status
+         // Check if hamann file already is current working tree status
         // -> YES: Load up the file via _lib.SetLibrary();
         if (_IsAlreadyParsed()) {
-            _Lib.SetLibrary(_HamannFiles.First(), null, null);
+            _Lib.SetLibrary(_HamannFiles!.First(), null, null);
             if (_Lib.GetLibrary() != null) return;
         }
 
          // -> NO: Try to create a new file
-        var created = xmlservice.TryCreate();
+        var created = _XMLService.TryCreate();
         if (created != null) {
             var file = SaveHamannFile(created, _hamannFileProvider.GetFileInfo("./").PhysicalPath, null);
             if (file != null) {
-                _lib.SetLibrary(file, created.Document, null);
+                _Lib.SetLibrary(file, created.Document, null);
                 if (_Lib.GetLibrary() != null) return;
             }
         }
@@ -75,36 +75,32 @@ public class XMLFileProvider : IXMLFileProvider {
         // -> There is none? Use Fallback:
         else {
             var options = new HaWeb.Settings.HaDocumentOptions();
-                if (_lib.SetLibrary(null, null, null) == null) {
+                if (_Lib.SetLibrary(null, null, null) == null) {
                 throw new Exception("Die Fallback Hamann.xml unter " + options.HamannXMLFilePath + " kann nicht geparst werden.");
             }
         }
     }
 
-    public void Reload(IConfiguration config) {
+    public void ParseConfiguration(IConfiguration config) {
         _Branch = config.GetValue<string>("RepositoryBranch");
-        if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows)) {
-            _hamannFileProvider = new PhysicalFileProvider(config.GetValue<string>("HamannFileStoreWindows"));
-            _bareRepositoryFileProvider = new PhysicalFileProvider(config.GetValue<string>("BareRepositoryPathWindows")); 
-            _workingTreeFileProvider = new PhysicalFileProvider(config.GetValue<string>("WorkingTreePathWindows")); 
-        } 
-        else {
-            _hamannFileProvider = new PhysicalFileProvider(config.GetValue<string>("HamannFileStoreLinux"));
-            _bareRepositoryFileProvider = new PhysicalFileProvider(config.GetValue<string>("BareRepositoryPathLinux"));
-            _workingTreeFileProvider = new PhysicalFileProvider(config.GetValue<string>("WorkingTreePathLinux")); 
-        }
 
-        // Create File Lists; Here and in xmlservice, which does preliminary checking
         Scan();
+        // Reset XMLInteractionService
         if (_WorkingTreeFiles != null && _WorkingTreeFiles.Any()) {
             _XMLService.Collect(_WorkingTreeFiles);
         }
         _HamannFiles = _ScanHamannFiles();
         
+        if (_HamannFiles != null && _HamannFiles.Select(x => x.Name).Contains(_Lib.GetActiveFile().Name)) {
+            _Lib.SetLibrary(_Lib.GetActiveFile(), null, null);
+            if (_Lib.GetLibrary() != null) return;
+        }
+
+        // Failed to reload File, reload it all, same procedure as above:
         // Check if hamann file already is current working tree status
         // -> YES: Load up the file via _lib.SetLibrary();
         if (_IsAlreadyParsed()) {
-            _Lib.SetLibrary(_HamannFiles.First(), null, null);
+            _Lib.SetLibrary(_HamannFiles!.First(), null, null);
             if (_Lib.GetLibrary() != null) return;
         }
 

HaWeb/Models/FileList.cs

@@ -27,13 +27,4 @@ public class FileList {
 
     public List<XMLRootDocument>? GetFileList()
         => this._Files != null ? this._Files.ToList() : null;
-
-    public FileList Clone() {
-        var ret = new FileList(this.XMLRoot);
-        if (_Files != null)
-            foreach (var file in _Files) {
-                ret.Add(file);
-            }
-        return ret;
-    }
 }

HaWeb/Models/StartEndYear.cs

@@ -1,6 +0,0 @@
-namespace HaWeb.Models;
-using System.ComponentModel.DataAnnotations;
-public class YearSetting {
-    [Required]
-    public int EndYear { get; set; }
-}

HaWeb/Models/SyntaxCheckModel.cs

@@ -1,22 +1,22 @@
 namespace HaWeb.Models;
 
 public class SyntaxCheckModel {
-    public string Prefix { get; private set; }
+    public string File { get; private set; }
-    public List<SyntaxError>? Errors { get; set; }
+    public List<SyntaxError>? Errors { get; private set; }
-    public List<SyntaxError>? Warnings { get; set; }
 
-    public SyntaxCheckModel(string prefix) {
+    public SyntaxCheckModel(string file) {
-        Prefix = prefix;
+        File = file;
+    }
+
+    public void Log(int? line, int? column, string msg) {
+        if (String.IsNullOrWhiteSpace(msg)) return;
+        if (Errors == null) Errors = new();
+        // var prefix = DateTime.Now.ToLongDateString() + ": ";
+        Errors.Add(new SyntaxError(line, column, msg));
+    }
+
+    public void ResetLog() {
+        Errors = null;
     }
 }
 
-public class SyntaxError {
-    public string Message { get; private set; }
-    public string? File { get; set; }
-    public string? Line { get; set; }
-    public string? Column { get; set; }
-
-    public SyntaxError(string message) {
-        Message = message;
-    }
-}

HaWeb/Models/SyntaxErrorModel.cs

@@ -0,0 +1,13 @@
+namespace HaWeb.Models;
+
+public class SyntaxError {
+    public string Message { get; private set; }
+    public int? Line { get; set; }
+    public int? Column { get; set; }
+
+    public SyntaxError(int? line, int? column, string message) {
+        Line = line;
+        Column = column;
+        Message = message;
+    }
+}

HaWeb/Models/XMLStateViewModel.cs

@@ -19,6 +19,9 @@ public class XMLStateViewModel {
     // Verfügbare (Gesamt-)Dateien
     public List<IFileInfo>? HamannFiles { get; set; }
 
+    // Syntax-Check-Resultate
+    public Dictionary<string, SyntaxCheckModel>? SyntaxCheck { get; set; }
+
     public XMLStateViewModel(
         string title, 
         (DateTime PullTime, string Hash)? gitData,

HaWeb/Program.cs

@@ -26,8 +26,6 @@ if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows)) {
     builder.Configuration.AddJsonFile(p, optional: true, reloadOnChange: true);
 }
 
-
-
 // Create initial Data
 var tS = new XMLTestService(); 
 var XMLIS = new XMLInteractionService(builder.Configuration, tS);
@@ -59,7 +57,7 @@ var cM = new ConfigurationMonitor(configpaths.ToArray(), app.Services);
 ChangeToken.OnChange(
     () => app.Configuration.GetReloadToken(),
     (state) => cM.InvokeChanged(state),
-    configpaths.ToArray()
+    app.Environment
 );
 
 // Configure the HTTP request pipeline.

HaWeb/Views/Admin/Dynamic/XMLState.cshtml

@@ -25,8 +25,18 @@
             <td>@f.GetLastModified()</td>
             @if (f.IsValid) {
               <td>Valid! @f.GetLog()</td>
+              <td>
+                 @if (Model.SyntaxCheck[f.FileName] != null && Model.SyntaxCheck[f.FileName].Errors != null) {
+                  <ul>
+                  @foreach(var e in Model.SyntaxCheck[f.FileName]?.Errors) {
+                    <li>@e.Line @e.Column @e.Message </li>
+                  }
+                  </ul>
+                 }
+              </td>
             } else {
               <td>@f.GetLog()</td>
+              <td> </td>
             }
           </tr>
         }

HaWeb/XMLParser/IXMLInteractionService.cs

@@ -16,6 +16,7 @@ public interface IXMLInteractionService {
     public List<IXMLRoot>? GetRootsList();
     public void CreateSearchables(XDocument document);
     public List<FileModel>? GetManagedFiles();
+    public Dictionary<string, SyntaxCheckModel>? Test();
     public List<(string Index, List<(string Page, string Line, string Preview, string Identifier)> Results)>? SearchCollection(string collection, string searchword, IReaderService reader, ILibrary? lib);
     public List<(string Index, List<(string Page, string Line, string Preview, string Identifier)> Results)>? GetPreviews(List<(string, List<Marginal>)> places, IReaderService reader, ILibrary lib);
 }

HaWeb/XMLParser/XMLInteractionService.cs

@@ -86,11 +86,12 @@ public class XMLInteractionService : IXMLInteractionService {
     public void Collect(List<IFileInfo> files) {
         if (files == null || !files.Any()) return;
         _ValidState = true;
-        List<FileModel> res = new List<FileModel>();
+        Dictionary<string, FileList?>? lF = new Dictionary<string, FileList?>();
+        List<FileModel> fM = new List<FileModel>();
         foreach (var f in files) {
             var sb = new StringBuilder();
             var m = _CreateFileModel(f, null);
-            res.Add(m);
+            fM.Add(m);
             // 1. Open File for Reading
             try {
                 using (Stream file = f.CreateReadStream()) {
@@ -118,9 +119,8 @@ public class XMLInteractionService : IXMLInteractionService {
                     // Success! File can be recognized and parsed.
                     m.Validate();
                     foreach (var d in docs) {
-                        if (_Loaded == null) _Loaded = new Dictionary<string, FileList?>();
+                        if (!lF.ContainsKey(d.Prefix)) lF.Add(d.Prefix, new FileList(d.XMLRoot));
-                        if (!_Loaded.ContainsKey(d.Prefix)) _Loaded.Add(d.Prefix, new FileList(d.XMLRoot));
+                        lF[d.Prefix]!.Add(d);
-                        _Loaded[d.Prefix]!.Add(d);
                     }
                 }
             } catch (Exception ex) {
@@ -128,20 +128,26 @@ public class XMLInteractionService : IXMLInteractionService {
                 continue;
             }
         }
-        if(res.Any()) this._ManagedFiles = res;
 
-        // Set validity
+        // Set data
+        this._ManagedFiles = fM;
+        this._Loaded = lF;
         foreach (var f in _ManagedFiles) {
-            if (!f.IsValid) _ValidState = false;
+            if (!f.IsValid) this._ValidState = false;
             break;
         }
+    }
 
-        // TODO: Speed up this:
+    public Dictionary<string, SyntaxCheckModel>? Test() {
+        if (_Loaded == null) return null;
+        // TODO: Speed up this, move it into a background task:
         var sw = new Stopwatch();
         sw.Start();
-        _testService.Test(this);
+        var res = this._Loaded?.SelectMany(x => x.Value?.GetFileList()?.Select(x => x.File)).Distinct().Select(x => x.FileName);
+        var ret = _testService.Test(this._Loaded, res.ToDictionary(x => x, y => new SyntaxCheckModel(y)));
         sw.Stop();
         Console.WriteLine("Syntaxcheck " + sw.ElapsedMilliseconds.ToString() + " ms");
+        return ret;
     }
 
     public XElement? TryCreate() {

HaWeb/XMLTests/IXMLTestService.cs

@@ -1,3 +1,4 @@
+using HaWeb.Models;
 using HaWeb.XMLParser;
 
 namespace HaWeb.XMLTests;
@@ -7,5 +8,5 @@ public interface IXMLTestService {
     public Dictionary<string, INodeRule>? Ruleset { get; }
     public Dictionary<string, ICollectionRule>? CollectionRuleset { get; }
 
-    public void Test(IXMLInteractionService _XMLService);
+    public Dictionary<string, SyntaxCheckModel>? Test(Dictionary<string, FileList?>? _LoadedFiles, Dictionary<string, SyntaxCheckModel> _Results);
 }

HaWeb/XMLTests/XMLTestService.cs

@@ -1,4 +1,6 @@
 namespace HaWeb.XMLTests;
+
+using HaWeb.Models;
 using HaWeb.XMLParser;
 
 public class XMLTestService : IXMLTestService {
@@ -7,28 +9,26 @@ public class XMLTestService : IXMLTestService {
     public XMLTestService() {
         var roottypes = _GetAllTypesThatImplementInterface<INodeRule>().ToList();
         roottypes.ForEach( x => {
-            if (this.Ruleset == null) this.Ruleset = new Dictionary<string, INodeRule>();
+            if (this.Ruleset == null) this.Ruleset = new();
             var instance = (INodeRule)Activator.CreateInstance(x)!;
             if (instance != null) this.Ruleset.Add(instance.Name, instance);
         });
 
         var collectionruleset = _GetAllTypesThatImplementInterface<ICollectionRule>().ToList();
         collectionruleset.ForEach( x => {
-            if (this.CollectionRuleset == null) this.CollectionRuleset = new Dictionary<string, ICollectionRule>();
+            if (this.CollectionRuleset == null) this.CollectionRuleset = new();
             var instance = (ICollectionRule)Activator.CreateInstance(x)!;
             if (instance != null) this.CollectionRuleset.Add(instance.Name, instance);
         });
     }
 
-    public void Test(IXMLInteractionService _XMLService) {
+    public Dictionary<string, SyntaxCheckModel>? Test(Dictionary<string, FileList?>? _Loaded, Dictionary<string, SyntaxCheckModel> _Results) {
-        var docs = _XMLService.GetLoaded();
+        if (_Loaded == null) return null;
-        if (docs == null) return;
+        var tester = new XMLTester(this, _Loaded, _Results);
-        var tester = new XMLTester(this, docs);
+        return tester.Test();
-        tester.Test();
     }
 
-    private IEnumerable<Type> _GetAllTypesThatImplementInterface<T>()
+    private IEnumerable<Type> _GetAllTypesThatImplementInterface<T>() {
-    {
         return System.Reflection.Assembly.GetExecutingAssembly()
             .GetTypes()
             .Where(type => typeof(T).IsAssignableFrom(type) && !type.IsInterface);

HaWeb/XMLTests/XMLTester.cs

@@ -9,12 +9,14 @@ public class XMLTester {
     private Dictionary<string, INodeRule>? _Ruleset;
     private Dictionary<string, ICollectionRule>? _CollectionRuleset;
     private List<XMLRootDocument>? _Documents;
+    private Dictionary<string, SyntaxCheckModel> _Results;
     private Dictionary<string, HashSet<string>>? _IDs;
     private Dictionary<string, HashSet<string>>? _CollectionIDs;
     private Dictionary<string, List<(XElement, XMLRootDocument)>?> _XPathEvaluated;
-    public XMLTester (IXMLTestService testService, Dictionary<string, Models.FileList?>? filelists) {
+    public XMLTester (IXMLTestService testService, Dictionary<string, Models.FileList?>? filelists, Dictionary<string, SyntaxCheckModel> results) {
         _Ruleset  = testService.Ruleset;
         _CollectionRuleset = testService.CollectionRuleset;
+        _Results = results;
         if (filelists != null) {
             foreach (var fl in filelists) {
                 if (fl.Value != null)  {
@@ -27,20 +29,21 @@ public class XMLTester {
         _XPathEvaluated = new Dictionary<string, List<(XElement, XMLRootDocument)>?>();
     }
 
-    public void Test() {
+    public Dictionary<string, SyntaxCheckModel>? Test() {
-        if (_Ruleset == null) return;        
+        if (_Ruleset == null) return null;        
         _IDs = new Dictionary<string, HashSet<string>>();
         foreach (var rule in _Ruleset) {
             buildIDs(rule.Value);
             checkRequiredAttributes(rule.Value);
             checkReferences(rule.Value);
         }
-        if (_CollectionRuleset == null) return;
+        if (_CollectionRuleset == null) return null;
         _CollectionIDs = new Dictionary<string, HashSet<string>>();
         foreach (var collectionrule in _CollectionRuleset) {
             buildIDs(collectionrule.Value);
             checkReferences(collectionrule.Value);
         }
+        return _Results;
     }
 
     private void checkReferences(INodeRule rule) {
@@ -54,7 +57,8 @@ public class XMLTester {
                     if (_IDs != null && _IDs.ContainsKey(keyname) && hasattr) {
                         var val = e.Item1.Attribute(r.LinkAttribute)!.Value;
                         if (!_IDs[keyname].Contains(val)) {
-                            e.Item2.File.Log(generateLogMessage(e.Item1) + "Verlinktes Element " + val + " nicht gefunden.");
+                            var lc = getLineColumn(e.Item1);
+                            _Results[e.Item2.File.FileName].Log(lc.Item1, lc.Item2, "Verlinktes Element " + val + " nicht gefunden.");
                         }
                     }
                 }
@@ -69,7 +73,8 @@ public class XMLTester {
             if (elemens != null && elemens.Any()) {
                 foreach(var r in rule.GenerateBacklinkString(elemens)) {
                     if (!r.Item4 && !_CollectionIDs[rule.Name].Contains(r.Item1)) {
-                        r.Item3.File.Log(generateLogMessage(r.Item2) + "Verlinktes Element " + r.Item1 + " nicht gefunden.");
+                        var lc = getLineColumn(r.Item2);
+                        _Results[r.Item3.File.FileName].Log(lc.Item1, lc.Item2, "Verlinktes Element " + r.Item1 + " nicht gefunden.");
                     }
                     if (r.Item4) {
                         var coll = _CollectionIDs[rule.Name];
@@ -77,15 +82,18 @@ public class XMLTester {
                         var searchterm = items[0];
                         var found = coll.Where(x => x.StartsWith(searchterm));
                         if (items[0] == "NA" || found == null || !found.Any()) {
-                            r.Item3.File.Log(generateLogMessage(r.Item2) + "Verlinktes Element " + r.Item1 + " nicht gefunden.");
+                            var lc = getLineColumn(r.Item2);
+                            _Results[r.Item3.File.FileName].Log(lc.Item1, lc.Item2, "Verlinktes Element " + r.Item1 + " nicht gefunden.");
                         } else {
                             for (var i = 1; i < items.Length; i++) {
                                 if (items[i] == "NA") break;
                                 else {
                                     searchterm = searchterm + "-" + items[i];
                                     found = found.Where(x => x.StartsWith(searchterm));
-                                    if (found == null || !found.Any())
+                                    if (found == null || !found.Any()) {
-                                        r.Item3.File.Log(generateLogMessage(r.Item2) + "Verlinktes Element " + r.Item1 + " nicht gefunden.");
+                                        var lc = getLineColumn(r.Item2);
+                                        _Results[r.Item3.File.FileName].Log(lc.Item1, lc.Item2, "Verlinktes Element " + r.Item1 + " nicht gefunden.");
+                                    }
                                 }
                             }
                         }
@@ -126,7 +134,8 @@ public class XMLTester {
                 if (elemens != null && elemens.Any()) {
                     foreach (var r in rule.GenerateIdentificationStrings(elemens)) {
                         if (!hs.Add(r.Item1)) {
-                            r.Item3.File.Log(generateLogMessage(r.Item2) + "Brief-Seite-Zeile  " + r.Item1 + " mehrdeutig.");
+                            var lc = getLineColumn(r.Item2);
+                            _Results[r.Item3.File.FileName].Log(lc.Item1, lc.Item2, "Brief-Seite-Zeile  " + r.Item1 + " mehrdeutig.");
                         }
                     }
                 }
@@ -143,7 +152,8 @@ public class XMLTester {
             foreach (var e in elements) {
                 if (checkAttribute(e.Item1, attribute, e.Item2)) {
                     if (!hs.Add(e.Item1.Attribute(attribute)!.Value)) {
-                        e.Item2.File.Log(generateLogMessage(e.Item1) + "Attributwert " + e.Item1.Attribute(attribute)!.Value + " doppelt.");
+                        var lc = getLineColumn(e.Item1);
+                        _Results[e.Item2.File.FileName].Log(lc.Item1, lc.Item2, "Attributwert " + e.Item1.Attribute(attribute)!.Value + " doppelt.");
                     }
                 }
             }
@@ -152,18 +162,17 @@ public class XMLTester {
 
     private bool checkAttribute(XElement element, string attributename, XMLRootDocument doc, bool log = true) {
         if (!element.HasAttributes || element.Attribute(attributename) == null) {
-            if (log) doc.File.Log(generateLogMessage(element) + "Attribut " + attributename + " fehlt.");
+            if (log) {
+                var lc = getLineColumn(element);
+                _Results[doc.File.FileName].Log(lc.Item1, lc.Item2,"Attribut " + attributename + " fehlt.");
+            };
             return false;
         }
         return true;
     }
 
-    private string generateLogMessage(XElement element) {
+    private (int, int) getLineColumn(XElement element) {
-        return "Zeile " + 
+        return (((IXmlLineInfo)element).LineNumber, ((IXmlLineInfo)element).LinePosition);
-            ((IXmlLineInfo)element).LineNumber.ToString() + 
-            ", Element " +
-            element.Name +
-            ": ";
     }
 
     // Cache for XPATH evaluation