refactored responses

2025-04-06 15:37:32 +05:00
parent 3c1d195849
commit d70b605127
17 changed files with 415 additions and 263 deletions
@@ -0,0 +1,88 @@
+using System.IO.Compression;
+using System.Linq;
+using System.Text.Encodings.Web;
+
+namespace ParadoxSaveParser.WebAPI.BackgroundTasks;
+
+public class SaveParsingOperation
+{
+    public readonly long OperationId;
+    public readonly SaveFileMetadata Meta;
+    public readonly ISearchExpression SearchQuery;
+    
+    private readonly ContextLogger _logger;
+    private readonly CancellationToken _cancelToken;
+
+    private static readonly JsonSerializerOptions _saveSerializerOptions = new()
+    {
+        WriteIndented = true,
+        Encoder = JavaScriptEncoder.UnsafeRelaxedJsonEscaping,
+        MaxDepth = 1024
+    };
+
+    public SaveParsingOperation(long operationId, SaveFileMetadata meta, ISearchExpression searchQuery,
+        ContextLogger logger, CancellationToken cancelToken)
+    {
+        OperationId = operationId;
+        Meta = meta;
+        SearchQuery = searchQuery;
+        _logger = logger;
+        _cancelToken = cancelToken;
+    }
+
+    public async void StartAsync()
+    {
+        try
+        {
+            _logger.LogInfo($"Starting background parsing operation of {Meta.game} save {Meta.id}");
+            switch (Meta.game)
+            {
+                case Game.EU4:
+                    await ParseSaveEU4();
+                    break;
+                default:
+                    throw new ArgumentOutOfRangeException(Meta.game.ToString());
+            }
+            _logger.LogInfo($"Finished parsing operation of {Meta.game} save {Meta.id}");
+        }
+        catch (Exception ex)
+        {
+            string errorMesage = ex.ToStringDemystified();
+            _logger.LogError(errorMesage);
+            Meta.errorMessage = errorMesage;
+        }
+        finally
+        {
+            GC.Collect(GC.MaxGeneration, GCCollectionMode.Aggressive, true, true);
+        }
+    }
+    
+    private async Task ParseSaveEU4()
+    {
+        // wait for save file closing
+        await Task.Delay(200, _cancelToken);
+        string extractedGamestatePath = PathHelper.GetSaveFilePath(Meta.id) + ".gamestate";
+        using (var zipArchive = ZipFile.Open(PathHelper.GetSaveFilePath(Meta.id).Str, ZipArchiveMode.Read))
+        {
+            var zipEntry = zipArchive.Entries.FirstOrDefault(e => e.Name == "gamestate");
+            if (zipEntry is null)
+                throw new Exception("Invalid save format: no 'gamestate' file found");
+
+            zipEntry.ExtractToFile(extractedGamestatePath, true);
+        }
+
+        var gamestateStream = File.OpenRead(extractedGamestatePath);
+
+        Meta.status = SaveFileProcessingStatus.Parsing;
+        var parser = new SaveParserEU4(gamestateStream, SearchQuery);
+        var result = parser.Parse();
+
+        Meta.status = SaveFileProcessingStatus.SavingResults;
+        var resultFilePath = PathHelper.GetParsedSaveFilePath(Meta.id);
+        await using var resultFile = File.OpenWrite(resultFilePath);
+        await JsonSerializer.SerializeAsync(resultFile, result, 
+            _saveSerializerOptions, _cancelToken);
+        Meta.status = SaveFileProcessingStatus.Done;
+        Meta.SaveToFile();
+    }
+}