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https://github.com/Theodor-Springmann-Stiftung/hamann-ausgabe-core.git
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Setup Git Repository Parsing
This commit is contained in:
Simon Martens
228
HaWeb/FileHelpers/XMLFileProvider.cs
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228
HaWeb/FileHelpers/XMLFileProvider.cs
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namespace HaWeb.FileHelpers;
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using Microsoft.Extensions.FileProviders;
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using Microsoft.AspNetCore.Mvc.ModelBinding;
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using HaWeb.Models;
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using HaWeb.XMLParser;
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using HaWeb.XMLTests;
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using System.Xml.Linq;
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using System.Runtime.InteropServices;
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using System.Diagnostics;
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// XMLProvider provides a wrapper around the available XML data on a FILE basis
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public class XMLFileProvider : IXMLFileProvider {
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private readonly IHaDocumentWrappper _Lib;
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private readonly IXMLInteractionService _XMLService;
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private IFileProvider _hamannFileProvider;
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private IFileProvider _bareRepositoryFileProvider;
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private IFileProvider _workingTreeFileProvider;
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private string _Branch;
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private List<IFileInfo>? _WorkingTreeFiles;
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private List<IFileInfo>? _HamannFiles;
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private static (DateTime PullTime, string Hash)? _GitData;
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// Startup (LAST)
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public XMLFileProvider(IXMLInteractionService xmlservice, IHaDocumentWrappper _lib, IConfiguration config) {
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// TODO: Test Read / Write Access
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_Lib = _lib;
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_XMLService = xmlservice;
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_Branch = config.GetValue<string>("RepositoryBranch");
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if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows)) {
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_hamannFileProvider = new PhysicalFileProvider(config.GetValue<string>("HamannFileStoreWindows"));
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_bareRepositoryFileProvider = new PhysicalFileProvider(config.GetValue<string>("BareRepositoryPathWindows"));
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_workingTreeFileProvider = new PhysicalFileProvider(config.GetValue<string>("WorkingTreePathWindows"));
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}
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else {
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_hamannFileProvider = new PhysicalFileProvider(config.GetValue<string>("HamannFileStoreLinux"));
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_bareRepositoryFileProvider = new PhysicalFileProvider(config.GetValue<string>("BareRepositoryPathLinux"));
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_workingTreeFileProvider = new PhysicalFileProvider(config.GetValue<string>("WorkingTreePathLinux"));
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}
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// Create File Lists; Here and in xmlservice, which does preliminary checking
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Scan();
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if (_WorkingTreeFiles != null && _WorkingTreeFiles.Any()) {
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xmlservice.Collect(_WorkingTreeFiles);
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}
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_HamannFiles = _ScanHamannFiles();
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// Check if hamann file already is current working tree status
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// -> YES: Load up the file via _lib.SetLibrary();
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if (_IsAlreadyParsed()) {
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_Lib.SetLibrary(_HamannFiles.First(), null, null);
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if (_Lib.GetLibrary() != null) return;
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}
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// -> NO: Try to create a new file
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var created = xmlservice.TryCreate();
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if (created != null) {
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var file = SaveHamannFile(created, _hamannFileProvider.GetFileInfo("./").PhysicalPath, null);
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if (file != null) {
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_lib.SetLibrary(file, created.Document, null);
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if (_Lib.GetLibrary() != null) return;
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}
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}
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// It failed, so use the last best File:
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else if (_HamannFiles != null && _HamannFiles.Any()) {
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_Lib.SetLibrary(_HamannFiles.First(), null, null);
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if (_Lib.GetLibrary() != null) return;
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}
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// -> There is none? Use Fallback:
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else {
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var options = new HaWeb.Settings.HaDocumentOptions();
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if (_lib.SetLibrary(null, null, null) == null) {
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throw new Exception("Die Fallback Hamann.xml unter " + options.HamannXMLFilePath + " kann nicht geparst werden.");
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}
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}
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}
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public void Reload(IConfiguration config) {
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_Branch = config.GetValue<string>("RepositoryBranch");
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if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows)) {
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_hamannFileProvider = new PhysicalFileProvider(config.GetValue<string>("HamannFileStoreWindows"));
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_bareRepositoryFileProvider = new PhysicalFileProvider(config.GetValue<string>("BareRepositoryPathWindows"));
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_workingTreeFileProvider = new PhysicalFileProvider(config.GetValue<string>("WorkingTreePathWindows"));
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}
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else {
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_hamannFileProvider = new PhysicalFileProvider(config.GetValue<string>("HamannFileStoreLinux"));
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_bareRepositoryFileProvider = new PhysicalFileProvider(config.GetValue<string>("BareRepositoryPathLinux"));
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_workingTreeFileProvider = new PhysicalFileProvider(config.GetValue<string>("WorkingTreePathLinux"));
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}
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// Create File Lists; Here and in xmlservice, which does preliminary checking
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Scan();
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if (_WorkingTreeFiles != null && _WorkingTreeFiles.Any()) {
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_XMLService.Collect(_WorkingTreeFiles);
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}
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_HamannFiles = _ScanHamannFiles();
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// Check if hamann file already is current working tree status
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// -> YES: Load up the file via _lib.SetLibrary();
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if (_IsAlreadyParsed()) {
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_Lib.SetLibrary(_HamannFiles.First(), null, null);
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if (_Lib.GetLibrary() != null) return;
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}
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// -> NO: Try to create a new file
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var created = _XMLService.TryCreate();
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if (created != null) {
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var file = SaveHamannFile(created, _hamannFileProvider.GetFileInfo("./").PhysicalPath, null);
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if (file != null) {
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_Lib.SetLibrary(file, created.Document, null);
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if (_Lib.GetLibrary() != null) return;
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}
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}
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// It failed, so use the last best File:
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else if (_HamannFiles != null && _HamannFiles.Any()) {
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_Lib.SetLibrary(_HamannFiles.First(), null, null);
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if (_Lib.GetLibrary() != null) return;
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}
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// -> There is none? Use Fallback:
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else {
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var options = new HaWeb.Settings.HaDocumentOptions();
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if (_Lib.SetLibrary(null, null, null) == null) {
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throw new Exception("Die Fallback Hamann.xml unter " + options.HamannXMLFilePath + " kann nicht geparst werden.");
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}
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}
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}
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// Getters and Setters
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public List<IFileInfo>? GetWorkingTreeFiles() => _WorkingTreeFiles;
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public (DateTime PullTime, string Hash)? GetGitData() => _GitData;
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public List<IFileInfo>? GetHamannFiles() => this._HamannFiles;
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// Functions
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public void DeleteHamannFile(string filename) {
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if (_HamannFiles == null) return;
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var files = _HamannFiles.Where(x => x.Name == filename);
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foreach (var file in files) {
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File.Delete(file.PhysicalPath);
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}
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_HamannFiles.RemoveAll(x => x.Name == filename);
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}
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public void Scan() {
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_WorkingTreeFiles = _ScanWorkingTreeFiles();
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_GitData = _ScanGitData();
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}
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public IFileInfo? SaveHamannFile(XElement element, string basefilepath, ModelStateDictionary? ModelState) {
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if (!_GitData.HasValue) return null;
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var filename = "hamann_" + _GitData.Value.PullTime.Year + "-" + _GitData.Value.PullTime.Month + "-" + _GitData.Value.PullTime.Day + "_" + _GitData.Value.PullTime.Hour + "-" + _GitData.Value.PullTime.Minute + "." + _GitData.Value.Hash.Substring(0,7) + ".xml";
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var path = Path.Combine(basefilepath, filename);
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try {
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if (!Directory.Exists(basefilepath))
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Directory.CreateDirectory(basefilepath);
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using (var targetStream = System.IO.File.Create(path))
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element.Save(targetStream, SaveOptions.DisableFormatting);
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} catch (Exception ex) {
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if (ModelState != null) ModelState.AddModelError("Error", "Die Datei konnte nicht gespeichert werden: " + ex.Message);
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return null;
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}
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var info = _hamannFileProvider.GetFileInfo(filename);
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if (info == null) {
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if (ModelState != null) ModelState.AddModelError("Error", "Auf die neu erstellte Datei konnte nicht zugegriffen werden.");
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return null;
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}
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if (_HamannFiles == null) _HamannFiles = new List<IFileInfo>();
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_HamannFiles.RemoveAll(x => x.Name == info.Name);
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_HamannFiles.Add(info);
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return info;
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}
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public bool HasChanged() {
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if (!_GitData.HasValue) return true;
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var current = _ScanGitData();
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if (current.Item2 != _GitData.Value.Hash) {
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_GitData = current;
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return true;
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}
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return false;
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}
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private (DateTime, string) _ScanGitData() {
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var head = _bareRepositoryFileProvider.GetFileInfo("refs/heads/" + _Branch);
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return (head.LastModified.DateTime, File.ReadAllText(head.PhysicalPath));
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}
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private void _RegisterChangeCallbacks() {
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var cT = _bareRepositoryFileProvider.Watch("refs/heads/" + _Branch);
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}
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// Gets all XML Files
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private List<IFileInfo>? _ScanWorkingTreeFiles() {
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var files = _workingTreeFileProvider.GetDirectoryContents(string.Empty)!.Where(x => !x.IsDirectory && x.Name.EndsWith(".xml"))!.ToList();
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return files;
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}
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private List<IFileInfo>? _ScanHamannFiles() {
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var files = _hamannFileProvider.GetDirectoryContents(string.Empty).Where(x => !x.IsDirectory && x.Name.StartsWith("hamann") && x.Name.EndsWith(".xml"));
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if (files == null || !files.Any()) return null;
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return files.OrderByDescending(x => x.LastModified).ToList();
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}
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private string? _GetHashFromHamannFilename(string filename) {
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var s = filename.Split('.', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
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if (s.Length != 3 || s.Last() != "xml" || !s.First().StartsWith("hamann")) return null;
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return s[1];
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}
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private bool _IsAlreadyParsed() {
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if (_HamannFiles == null || !_HamannFiles.Any() || !_GitData.HasValue) return false;
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var fhash = _GetHashFromHamannFilename(_HamannFiles.First().Name);
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var ghash = _GitData.Value.Hash.Substring(0,7);
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return fhash == ghash;
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}
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}
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