commented protobuf compilation

ParadoxSaveParser.CLI/Modes/Interactive.cs

@@ -1,9 +1,4 @@
-using System.IO;
+using Path = DTLib.Filesystem.Path;
-using System.IO.Compression;
-using System.Linq;
-using System.Text.Json;
-using ParadoxSaveParser.Lib;
-using Path = DTLib.Filesystem.Path;
 
 namespace ParadoxSaveParser.CLI;
 
@@ -75,7 +70,7 @@ internal static partial class Modes
                         ColoredConsole.Write("Input file path: ", ConsoleColor.Blue);
                         input = ColoredConsole.ReadLine(ConsoleColor.Gray);
                         if (string.IsNullOrEmpty(input))
-                            throw new NullReferenceException();
+                            throw new ArgumentException("Input file path is required");
                         inputPath = input;
                         break;
 
@@ -83,9 +78,9 @@ internal static partial class Modes
                     case "output":
                         ColoredConsole.Write("Output file path [default=stdout]: ", ConsoleColor.Blue);
                         input = ColoredConsole.ReadLine(ConsoleColor.Gray);
-                        if (string.IsNullOrEmpty(input))
+                        if(string.IsNullOrEmpty(input))
-                            throw new ArgumentException("Input file path is required");
+                            outputPath = null;
-                        inputPath = input;
+                        else outputPath = input;
                         break;
 
                     case "s":

ParadoxSaveParser.CLI/Modes/Search.cs

@@ -38,7 +38,7 @@ internal static partial class Modes
             var parser = new SaveParserEU4(inputStream, searchExpression);
             var parsedValue = parser.Parse();
             JsonSerializer.Serialize(outputStream, parsedValue,
-                ParsedValueJsonContext.Default.DictionaryStringListObject);
+                ParsedValueJsonContext.Default.DictionaryStringObject);
             outputStream.WriteByte((byte)'\n');
         }
         finally

ParadoxSaveParser.CLI/ParadoxSaveParser.CLI.csproj

@@ -14,6 +14,6 @@
     </ItemGroup>
 
     <ItemGroup>
-        <PackageReference Include="DTLib" Version="1.7.1"/>
+        <PackageReference Include="DTLib" Version="1.7.4" />
     </ItemGroup>
 </Project>

ParadoxSaveParser.Lib.Tests/ParadoxSaveParser.Lib.Tests.csproj

@@ -23,8 +23,8 @@
           <PrivateAssets>all</PrivateAssets>
           <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
-        <PackageReference Include="DTLib" Version="1.7.1"/>
+        <PackageReference Include="DTLib" Version="1.7.4" />
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.0" />
         <PackageReference Include="NUnit" Version="4.3.2" />
         <PackageReference Include="NUnit.Analyzers" Version="4.7.0">
           <PrivateAssets>all</PrivateAssets>

ParadoxSaveParser.Lib/ParadoxSaveParser.Lib.csproj

@@ -8,6 +8,6 @@
     </PropertyGroup>
     
     <ItemGroup>
-      <PackageReference Include="Microsoft.Extensions.ObjectPool" Version="9.0.3" />
+      <PackageReference Include="Microsoft.Extensions.ObjectPool" Version="9.0.5" />
     </ItemGroup>
 </Project>

ParadoxSaveParser.Lib/ParsedValueJsonContext.cs

@@ -3,11 +3,12 @@
 namespace ParadoxSaveParser.Lib;
 
 [JsonSourceGenerationOptions(MaxDepth = 1024, WriteIndented = true)]
-[JsonSerializable(typeof(Dictionary<string, List<object>>))]
+[JsonSerializable(typeof(Dictionary<string, object>))]
 [JsonSerializable(typeof(List<object>))]
 [JsonSerializable(typeof(string))]
 [JsonSerializable(typeof(long))]
 [JsonSerializable(typeof(double))]
+[JsonSerializable(typeof(bool))]
 public partial class ParsedValueJsonContext : JsonSerializerContext
 {
 }

ParadoxSaveParser.Lib/SaveParserEU4.cs

@@ -154,19 +154,29 @@ public class SaveParserEU4
         switch (tok.type)
         {
             case TokenType.StringOrNumber:
-                // string values can be empty
+                try
-                if(tok.value!.Length == 0)
+                {
-                    return string.Empty;
+                    // string values can be empty
+                    if (tok.value!.Length == 0)
+                        return string.Empty;
+                    if (tok.value.Equals("yes"))
+                        return true;
+                    if (tok.value.Equals("no"))
+                        return false;
                     
-                string tokStr = tok.value.ToString();
+                    string tokStr = tok.value.ToString();
-                _stringBuilderPool.Return(tok.value);
+                    if (tokStr[0] != '-' && !char.IsDigit(tokStr[0]))
-                if (tokStr[0] != '-' && !char.IsDigit(tokStr[0]))
+                        return tokStr;
+                    if (tokStr.Contains('.') && double.TryParse(tokStr, out double d))
+                        return d;
+                    if (long.TryParse(tokStr, out long l))
+                        return l;
                     return tokStr;
-                if (tokStr.Contains('.') && double.TryParse(tokStr, out double d))
+                }
-                    return d;
+                finally
-                if (long.TryParse(tokStr, out long l))
+                {
-                    return l;
+                    _stringBuilderPool.Return(tok.value!);
-                return tokStr;
+                }
             case TokenType.BracketOpen:
                 object obj = ParseListOrDict();
                 return obj;
@@ -216,7 +226,7 @@ public class SaveParserEU4
     }
 
     private static bool IsEmptyCollection(object value)
-        => value is Dictionary<string, List<object>> { Count: 0 } or List<object> { Count: 0 };
+        => value is Dictionary<string, object> { Count: 0 } or List<object> { Count: 0 };
 
     // doesn't move next
     private object ParseListOrDict()
@@ -264,9 +274,9 @@ public class SaveParserEU4
     }
 
     // moves next
-    private Dictionary<string, List<object>> ParseDict()
+    private Dictionary<string, object> ParseDict()
     {
-        Dictionary<string, List<object>> dict = new();
+        Dictionary<string, object> dict = new();
 
         // root is a dict without closing bracket, so this method must check _tokenIndex < _tokens.Count
         for (int localIndex = 0; _tokens.MoveNext(); localIndex++)
@@ -327,23 +337,32 @@ public class SaveParserEU4
 
             string keyStr = keySB.ToString();
             _stringBuilderPool.Return(keySB);
-            if (!dict.TryGetValue(keyStr, out var list))
+            
+            // Paradox save format has another way of defining list:
+            // a = 1
+            // a = 2
+            // It means `a = { 1 2 }`
+            if (dict.TryGetValue(keyStr, out var firstValue))
             {
-                list = new List<object>();
+                // Do dot add empty collections into list.
-                dict.Add(keyStr, list);
+                // `key:{}` is okay, but i don't want to see `key:[{},{},{},{},{},{}]`
+                if (IsEmptyCollection(value))
+                    continue;
+                
+                if (firstValue is List<object> existingList)
+                    existingList.Add(value);
+                else dict[keyStr] = new List<object> { firstValue, value };
+            }
+            else
+            {
+                dict.Add(keyStr, value);
             }
-
-            
-            // do dot add empty collections into list
-            if (IsEmptyCollection(value))
-                continue;
-            list.Add(value);
         }
 
         return dict;
     }
 
-    public Dictionary<string, List<object>> Parse()
+    public Dictionary<string, object> Parse()
     {
         var root = ParseDict();
         return root;

ParadoxSaveParser.Lib/SearchExpression.cs

@@ -1,6 +1,6 @@
 namespace ParadoxSaveParser.Lib;
 
-public record SearchArgs
+public readonly record struct SearchArgs
 {
     public readonly string KeyStr;
     public readonly StringBuilder? KeySB;
@@ -41,7 +41,8 @@ public static class SearchExpressionCompiler
             var subExprs = new List<ISearchExpression>();
             int supExprBegin = 1;
             int bracketBalance = 1;
-            for (int i = supExprBegin; i < query.Length && bracketBalance != 0; i++)
+            int i = supExprBegin;
+            for (; i < query.Length && bracketBalance != 0; i++)
             {
                 if (CharEqualsAndNotEscaped('(', query, i))
                 {
@@ -60,7 +61,7 @@ public static class SearchExpressionCompiler
                 }
             }
 
-            if (query[^1] != ')')
+            if (i != query.Length)
                 throw new NotImplementedException("Expressions after ')' are not supported");
 
             if (bracketBalance > 0)
@@ -68,7 +69,7 @@ public static class SearchExpressionCompiler
             if (bracketBalance < 0)
                 throw new Exception("Too many closing brackets");
 
-            var subPartLast = query.Slice(supExprBegin, query.Length - supExprBegin - 1);
+            var subPartLast = query.Slice(supExprBegin, i - 1 - supExprBegin);
             var subExprLast = Compile(subPartLast);
             subExprs.Add(subExprLast);
             return new MultipleMatchExpression(subExprs);

ParadoxSaveParser.WebAPI/BackgroundTasks/BackgroundJobManager.cs

@@ -1,4 +1,7 @@
-namespace ParadoxSaveParser.WebAPI.BackgroundTasks;
+using ParadoxSaveParser.WebAPI.Database;
+using ParadoxSaveParser.WebAPI.SaveDataFilters;
+
+namespace ParadoxSaveParser.WebAPI.BackgroundTasks;
 
 public class BackgroundJobManager
 {
@@ -11,11 +14,11 @@ public class BackgroundJobManager
     }
     
     public SaveParsingOperation StartNewParsingOperation(
-        SaveFileMetadata meta, ISearchExpression searchQuery, CancellationToken ct)
+        SaveFileMetadata meta, ISaveDataFilter filter, CancellationToken ct)
     {
         long nextId = Interlocked.Increment(ref _lastJobId);
         var contextLogger = new ContextLogger($"BackgroundJob-{nextId}", _parentLogger);
-        var op = new SaveParsingOperation(nextId, meta, searchQuery, contextLogger, ct);
+        var op = new SaveParsingOperation(nextId, meta, filter, contextLogger, ct);
         op.StartAsync();
         return op;
     }

ParadoxSaveParser.WebAPI/BackgroundTasks/SaveParsingOperation.cs

@@ -1,20 +1,23 @@
-using System.IO.Compression;
+using System.IO;
+using System.IO.Compression;
 using System.Linq;
 using System.Text.Encodings.Web;
 using System.Text.Json.Serialization;
+using ParadoxSaveParser.WebAPI.Database;
+using ParadoxSaveParser.WebAPI.SaveDataFilters;
 
 namespace ParadoxSaveParser.WebAPI.BackgroundTasks;
 
 public class SaveParsingOperation
 {
     public readonly long OperationId;
-    public readonly SaveFileMetadata Meta;
-    public readonly ISearchExpression SearchQuery;
     
+    private readonly SaveFileMetadata _meta;
+    private readonly ISaveDataFilter _filter;
     private readonly ContextLogger _logger;
-    private readonly CancellationToken _cancelToken;
+    private readonly CancellationToken _ct;
 
-    private static readonly JsonSerializerOptions _saveSerializerOptions = new()
+    private static readonly JsonSerializerOptions _jsonOptions = new()
     {
         WriteIndented = false,
         Encoder = JavaScriptEncoder.UnsafeRelaxedJsonEscaping,
@@ -22,36 +25,43 @@ public class SaveParsingOperation
         DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull,
     };
 
-    public SaveParsingOperation(long operationId, SaveFileMetadata meta, ISearchExpression searchQuery,
+    public SaveParsingOperation(long operationId, SaveFileMetadata meta, ISaveDataFilter filter,
-        ContextLogger logger, CancellationToken cancelToken)
+        ContextLogger logger, CancellationToken ct)
     {
         OperationId = operationId;
-        Meta = meta;
+        _meta = meta;
-        SearchQuery = searchQuery;
+        _filter = filter;
         _logger = logger;
-        _cancelToken = cancelToken;
+        _ct = ct;
     }
 
     public async void StartAsync()
     {
         try
         {
-            _logger.LogInfo($"Starting background parsing operation of {Meta.game} save {Meta.id}");
+            _logger.LogInfo($"Starting background parsing operation of {_meta.game} save {_meta.id}");
-            switch (Meta.game)
+            switch (_meta.game)
             {
                 case Game.EU4:
                     await ParseSaveEU4();
                     break;
                 default:
-                    throw new ArgumentOutOfRangeException(Meta.game.ToString());
+                    throw new ArgumentOutOfRangeException(_meta.game.ToString());
             }
-            _logger.LogInfo($"Finished parsing operation of {Meta.game} save {Meta.id}");
+            _logger.LogInfo($"Finished parsing operation of {_meta.game} save {_meta.id}");
         }
         catch (Exception ex)
         {
             string errorMesage = ex.ToStringDemystified();
             _logger.LogError(errorMesage);
-            Meta.errorMessage = errorMesage;
+            try
+            {
+                await Program.DB.SetMetadataError(_meta, errorMesage);
+            }
+            catch (Exception ex2)
+            {
+                _logger.LogError(ex2);
+            }
         }
         finally
         {
@@ -62,29 +72,31 @@ public class SaveParsingOperation
     private async Task ParseSaveEU4()
     {
         // wait for save file closing
-        await Task.Delay(200, _cancelToken);
+        await Task.Delay(200, _ct);
-        string extractedGamestatePath = PathHelper.GetSaveFilePath(Meta.id) + ".gamestate";
+        Dictionary<string, object> parsedData;
-        using (var zipArchive = ZipFile.Open(PathHelper.GetSaveFilePath(Meta.id).Str, ZipArchiveMode.Read))
+        await using (var gamestateStream = PathHelper.CreateTempFile())
         {
-            var zipEntry = zipArchive.Entries.FirstOrDefault(e => e.Name == "gamestate");
+            using (var zipArchive = ZipFile.Open(_meta.GetSaveFilePath().Str, ZipArchiveMode.Read))
-            if (zipEntry is null)
+            {
-                throw new Exception("Invalid save format: no 'gamestate' file found");
+                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);
+                await zipEntry.Open().CopyToAsync(gamestateStream, _ct);
+                gamestateStream.Seek(0, SeekOrigin.Begin);
+            }
+            
+            await Program.DB.UpdateMetadataStatus(_meta, SaveFileProcessingStatus.Parsing);
+            var parser = new SaveParserEU4(gamestateStream, _filter.SearchExpression);
+            parsedData = parser.Parse();
         }
 
-        var gamestateStream = File.OpenRead(extractedGamestatePath);
+        _filter.Apply(parsedData);
 
-        Meta.status = SaveFileProcessingStatus.Parsing;
+        await Program.DB.UpdateMetadataStatus(_meta, SaveFileProcessingStatus.SavingResults);
-        var parser = new SaveParserEU4(gamestateStream, SearchQuery);
+        var resultFilePath = _meta.GetParsedDataPath();
-        var result = parser.Parse();
+        await using (var resultFile = File.OpenWrite(resultFilePath))
-
+            await JsonSerializer.SerializeAsync(resultFile, parsedData, _jsonOptions, _ct);
-        Meta.status = SaveFileProcessingStatus.SavingResults;
+        await Program.DB.UpdateMetadataStatus(_meta, SaveFileProcessingStatus.Done);
-        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();
     }
 }

ParadoxSaveParser.WebAPI/Database/DatabaseConnector.cs

@@ -0,0 +1,106 @@
+using System.Linq;
+using SQLite;
+
+namespace ParadoxSaveParser.WebAPI.Database;
+
+public class DatabaseConnector
+{
+    private readonly int _uploadsLifetimeDays;
+    private readonly SQLiteAsyncConnection _db;
+    private readonly ContextLogger _logger;
+
+    public DatabaseConnector(string databasePath, int uploadsLifetimeDays, ILogger logger)
+    {
+        _uploadsLifetimeDays = uploadsLifetimeDays;
+        _db = new SQLiteAsyncConnection(databasePath);
+        _logger = new ContextLogger("Database", logger);
+    }
+
+    public async Task InitializeAsync()
+    {
+        await _db.CreateTableAsync<SaveFileMetadata>();
+    }
+    
+    public async Task<SaveFileMetadata?> GetMetadata(string id)
+    {
+        return (await _db.QueryAsync<SaveFileMetadata>(
+            "select * from SaveFileMetadata where id = ?", id))
+            .FirstOrDefault();
+    }
+    
+    public async Task<SaveFileMetadata> CreateMetadata(Game game)
+    {
+        var meta = new SaveFileMetadata
+        {
+            id = Guid.NewGuid().ToString(),
+            game = game,
+            status = SaveFileProcessingStatus.Initialized,
+            uploadDateTime = DateTime.Now
+        };
+        await _db.InsertAsync(meta);
+        return meta;
+    }
+
+    public async Task UpdateMetadataStatus(SaveFileMetadata meta, SaveFileProcessingStatus status)
+    {
+        meta.status = status;
+        await _db.UpdateAsync(meta);
+    }
+
+    public async Task SetMetadataError(SaveFileMetadata meta, string errorMessage)
+    {
+        meta.errorMessage = errorMessage;
+        await UpdateMetadataStatus(meta, SaveFileProcessingStatus.Error);
+        TryDeleteAssociatedFiles(meta);
+    }
+
+    public async Task DeleteMetadata(SaveFileMetadata meta, string reason)
+    {
+        _logger.LogDebug($"Deleting save file (id: {meta.id} reason: {reason}" +
+                         $"uploadDate: {meta.uploadDateTime:yyyy/MM/dd})");
+        await _db.DeleteAsync(meta);
+        TryDeleteAssociatedFiles(meta);
+    }
+
+    /// <summary>
+    /// WARNING: Call this method only when no parsing operations are running.
+    /// </summary>
+    public async Task DeleteInvalidData()
+    {
+        _logger.LogInfo("Deleting invalid data...");
+        
+        var expirationDate = DateTime.Now.AddDays(-_uploadsLifetimeDays);
+        var metadataTable = _db.Table<SaveFileMetadata>();
+        var metadataList = await metadataTable.ToListAsync();
+        int deleteCount = 0;
+        foreach (var meta in metadataList)
+        {
+            string deletionReason;
+            if(meta.status != SaveFileProcessingStatus.Done)
+                deletionReason = $"invalid status ({meta.status})";
+            else if (meta.uploadDateTime < expirationDate)
+               deletionReason = "expired";
+            else if(!meta.AssociatedFilesExist())
+                deletionReason = "files not found";
+            else continue;
+            
+            deleteCount++;
+            await DeleteMetadata(meta, deletionReason);
+        }
+
+        _logger.LogInfo($"Deleted {deleteCount} invalid records");
+    }
+
+    private void TryDeleteFile(IOPath file)
+    {
+        if (!File.Exists(file)) return;
+        _logger.LogDebug($"Deleting file '{file}'");
+        File.Delete(file);
+    }
+
+    private void TryDeleteAssociatedFiles(SaveFileMetadata meta)
+    {
+        TryDeleteFile(meta.GetSaveFilePath());
+        TryDeleteFile(meta.GetParsedDataPath());
+    }
+}

ParadoxSaveParser.WebAPI/Database/SaveFileMetadata.cs

@@ -0,0 +1,45 @@
+using System.Text.Json.Serialization;
+
+namespace ParadoxSaveParser.WebAPI.Database;
+
+public enum SaveFileProcessingStatus
+{
+    Initialized,
+    Uploaded,
+    Parsing,
+    SavingResults,
+    Done,
+    Error,
+}
+
+public class SaveFileMetadata
+{
+    [SQLite.PrimaryKey]
+    [SQLite.NotNull]
+    public string id { get; init; } = null!;
+
+    [JsonConverter(typeof(JsonStringEnumConverter))]
+    [SQLite.NotNull]
+    public Game game { get; init; }
+
+    [JsonConverter(typeof(JsonStringEnumConverter))]
+    [SQLite.NotNull]
+    public SaveFileProcessingStatus status { get; set; }
+    
+    [SQLite.NotNull]
+    public DateTime uploadDateTime { get; set; }
+    
+    // if error occured during parsing, it's message is saved here
+    // status stays the same as when error occured
+    public string? errorMessage { get; set; }
+    
+    
+    public IOPath GetSaveFilePath() => Path.Concat(PathHelper.SAVES_DIR, id + ".eu4");
+
+    public IOPath GetParsedDataPath() => Path.Concat(PathHelper.PARSED_DIR, id + ".parsed.json");
+
+    public bool AssociatedFilesExist()
+    {
+        return File.Exists(GetSaveFilePath()) && File.Exists(GetParsedDataPath());
+    }
+}

ParadoxSaveParser.WebAPI/Game.cs

@@ -0,0 +1,7 @@
+namespace ParadoxSaveParser.WebAPI;
+
+public enum Game
+{
+    Unknown,
+    EU4
+}

ParadoxSaveParser.WebAPI/ParadoxSaveParser.WebAPI.csproj

@@ -13,6 +13,16 @@
     </ItemGroup>
 
     <ItemGroup>
-        <PackageReference Include="DTLib.Web" Version="1.3.0"/>
+        <PackageReference Include="DTLib.Web" Version="1.4.0" />
+<!--        <PackageReference Include="Google.Protobuf" Version="3.31.0" />-->
+        <PackageReference Include="sqlite-net-pcl" Version="1.9.172" />
     </ItemGroup>
+
+<!--    <ItemGroup>-->
+<!--        <Compile Include="obj\Protobuf\*.g.cs" />-->
+<!--    </ItemGroup>-->
+
+<!--    <Target Name="PreBuild" BeforeTargets="PreBuildEvent">-->
+<!--        <Exec Command="sh -c &quot;mkdir -p obj/Protobuf &amp;&amp; protoc Protobuf/*.proto &#45;&#45;csharp_out=obj/Protobuf &#45;&#45;csharp_opt=file_extension=.g.cs&quot;" />-->
+<!--    </Target>-->
 </Project>

ParadoxSaveParser.WebAPI/PathHelper.cs

@@ -4,18 +4,34 @@ namespace ParadoxSaveParser.WebAPI;
 
 public static class PathHelper
 {
-    public static readonly IOPath DATA_DIR = "data";
+    public static readonly IOPath PUBLIC_DIR = "public";
+    public static readonly IOPath DATA_DIR = Path.Concat(PUBLIC_DIR, "data");
     public static readonly IOPath SAVES_DIR = Path.Concat(DATA_DIR, "saves");
-
+    public static readonly IOPath PARSED_DIR = Path.Concat(DATA_DIR, "parsed");
-    public static IOPath GetMetaFilePath(string save_id) => Path.Concat(SAVES_DIR, save_id + ".meta.json");
+    public static readonly IOPath TEMP_DIR = "temp";
-
-    public static IOPath GetSaveFilePath(string save_id) => Path.Concat(SAVES_DIR, save_id + ".eu4");
-
-    public static IOPath GetParsedSaveFilePath(string save_id) => Path.Concat(SAVES_DIR, save_id + ".parsed.json");
 
     public static void CreateProgramDirectories()
     {
         Directory.Create(DATA_DIR);
         Directory.Create(SAVES_DIR);
+        Directory.Create(PARSED_DIR);
+        Directory.Create(TEMP_DIR);
+    }
+
+    public static void CleanTempDirectory()
+    {
+        Directory.Delete(TEMP_DIR);
+        Directory.Create(TEMP_DIR);
+    }
+
+    public static Stream CreateTempFile()
+    {
+        string fileName = Guid.NewGuid().ToString();
+        IOPath filePath = Path.Concat(TEMP_DIR, fileName);
+        var stream = System.IO.File.Open(filePath.Str, FileMode.CreateNew, FileAccess.ReadWrite,
+            FileShare.Read | FileShare.Delete);
+        // file stays as a ghost until it is closed
+        File.Delete(filePath);
+        return stream;
     }
 }

ParadoxSaveParser.WebAPI/Program.cs

@@ -11,27 +11,25 @@ global using ParadoxSaveParser.Lib;
 global using Directory = DTLib.Filesystem.Directory;
 global using File = DTLib.Filesystem.File;
 global using Path = DTLib.Filesystem.Path;
-using System.Collections.Concurrent;
-using System.IO;
 using DTLib.Console;
 using DTLib.Dtsod;
 using DTLib.Web;
 using DTLib.Web.Routes;
 using ParadoxSaveParser.WebAPI.BackgroundTasks;
+using ParadoxSaveParser.WebAPI.Database;
 using ParadoxSaveParser.WebAPI.Routes;
+using ParadoxSaveParser.WebAPI.SaveDataFilters;
+// ReSharper disable MethodHasAsyncOverload
 
 namespace ParadoxSaveParser.WebAPI;
 
 public static class Program
 {
-    private static readonly IOPath _configPath = "./config.dtsod";
+    internal static bool IsDebug = true;
-    private static Config _config = new();
+    internal static DatabaseConnector DB = null!;
-    private static bool IsDebug = true;
-    private static readonly CancellationTokenSource _mainCancel = new();
-    internal static readonly ConcurrentDictionary<string, SaveFileMetadata> _saveMetadataStorage = new();
 
 
-    public static void Main(string[] args)
+    public static async Task Main(string[] args)
     {
         Console.InputEncoding = Encoding.UTF8;
         Console.OutputEncoding = Encoding.UTF8;
@@ -59,61 +57,56 @@ public static class Program
         var loggerMain = new ContextLogger(nameof(Main), loggerRoot);
         loggerMain.LogDebug("Debug log is enabled");
 
+        CancellationTokenSource mainCancel = new();
         Console.CancelKeyPress += (_, e) =>
         {
             e.Cancel = true;
             loggerMain.LogInfo("Ctrl+C Pressed");
-            _mainCancel.Cancel();
+            mainCancel.Cancel();
         };
 
         try
         {
             // config
-            if (!File.Exists(_configPath))
+            IOPath configPath = "./config.dtsod";
+            Config config;
+            if (File.Exists(configPath))
             {
-                loggerMain.LogWarn("config file not found.");
+                config = Config.FromDtsod(new DtsodV23(File.ReadAllText(configPath)));
-                File.WriteAllText(_configPath, _config.ToString());
-                loggerMain.LogWarn($"created default at {_configPath}.");
             }
             else
             {
-                _config = Config.FromDtsod(new DtsodV23(File.ReadAllText(_configPath)));
+                loggerMain.LogWarn("config file not found.");
+                config = new();
+                File.WriteAllText(configPath, config.ToString());
+                loggerMain.LogWarn($"created default at {configPath}.");
             }
             
             PathHelper.CreateProgramDirectories();
-
+            PathHelper.CleanTempDirectory();
-            var metaFiles = System.IO.Directory.GetFiles(
+            DB = new("database.sqlite", 30, loggerRoot);
-                PathHelper.SAVES_DIR.Str, "*.meta.json",
+            await DB.InitializeAsync();
-                SearchOption.TopDirectoryOnly);
+            await DB.DeleteInvalidData();
-            foreach (string metaFilePath in metaFiles)
-            {
-                using var metaFile = File.OpenRead(metaFilePath);
-                var meta = JsonSerializer.Deserialize<SaveFileMetadata>(metaFile) ??
-                           throw new NullReferenceException(metaFilePath);
-                if (meta.status != SaveFileProcessingStatus.Done)
-                    loggerMain.LogWarn(nameof(Main),
-                        $"metadata file '{metaFilePath}' status has invalid status {meta.status}");
-
-                if (!_saveMetadataStorage.TryAdd(meta.id, meta))
-                    throw new Exception("Guid collision!");
-            }
 
             var bgJobManager = new BackgroundJobManager(loggerRoot);
-            var saveParsingSearchExpressions = new Dictionary<Game, ISearchExpression>
+            var saveFilters = new Dictionary<Game, ISaveDataFilter>
             {
-                { Game.EU4, SearchExpressionCompiler.Compile("*.~") },
+                { Game.EU4, new SaveDataFilterEU4() },
             };
             
             // http server
             var router = new SimpleRouter(loggerRoot);
-            router.DefaultRoute = new ServeFilesRouteHandler("public");
+            router.DefaultRoute = new SimpleRouter.RouteWithMethod(HttpMethod.GET, 
-            router.MapRoute("/getSaveStatus", HttpMethod.GET, new GetSaveStatusHandler(_mainCancel.Token));
+                new ServeFilesRouteHandler(PathHelper.PUBLIC_DIR));
-            router.MapRoute("/uploadSave/eu4", HttpMethod.POST, new UploadSaveHandler(_mainCancel.Token, 
+            router.MapRoute("/uploadSave", HttpMethod.POST,
-                bgJobManager, saveParsingSearchExpressions));
+                new UploadSaveHandler(mainCancel.Token, bgJobManager, saveFilters));
-            router.MapRoute("/getSaveData", HttpMethod.GET, new GetSaveDataHandler(_mainCancel.Token));
+            router.MapRoute("/getSaveStatus", HttpMethod.GET,
+                new GetSaveStatusHandler(mainCancel.Token));
+            router.MapRoute("/getSaveData", HttpMethod.GET,
+                new GetSaveDataHandler(mainCancel.Token));
 
-            var app = new WebApp(_config.BaseUrl, loggerRoot, router, _mainCancel.Token);
+            var app = new WebApp(config.BaseUrl, loggerRoot, router, mainCancel.Token);
-            app.Run().GetAwaiter().GetResult();
+            await app.Run();
         }
         catch (OperationCanceledException ex)
         {
@@ -124,6 +117,4 @@ public static class Program
             loggerMain.LogError(ex.ToStringDemystified());
         }
     }
-
-    
 }

ParadoxSaveParser.WebAPI/Protobuf/ParsedData.proto

@@ -0,0 +1,21 @@
+syntax = "proto3";
+option csharp_namespace = "ParadoxSaveParser.WebAPI.MyProtobuf";
+
+message Item {
+  oneof value {
+    bool b = 1;
+    int64 i64 = 2;
+    double f64 = 3;
+    string str = 4;
+    ItemList list = 5;
+    ItemListMap map = 6;
+  }
+}
+
+message ItemList {
+  repeated Item items = 1;
+}
+
+message ItemListMap {
+  map<string, ItemList> items_map = 1;
+}

ParadoxSaveParser.WebAPI/README.md

@@ -1,10 +1,15 @@
 # WebAPI
 Simple web application created using DTLib.Web.
 
-# Routes
 
-### POST `/uploadSave/eu4`
+## Important
-- **Request:** `application/octet-stream` - .eu4 file
+Restart web application once per day to delete outdated data and clean RAM.
+
+## Routes
+### POST `/uploadSave`
+- **Query Params:**
+  - `game` - short name of the game (see [../README.md](../README.md))
+- **Request Body:** `application/octet-stream` - .eu4 file
 - **Response:**
     ```json
     { "saveId": "string" }

ParadoxSaveParser.WebAPI/Routes/GetSaveDataHandler.cs

@@ -1,4 +1,5 @@
 using System.Net;
+using ParadoxSaveParser.WebAPI.Database;
 using ParadoxSaveParser.WebAPI.HttpHelpers;
 
 namespace ParadoxSaveParser.WebAPI.Routes;
@@ -18,7 +19,17 @@ internal class GetSaveDataHandler : RouteHandlerBase
             return await ReturnHelper.ResponseError(ctx, requestLogger, _cancelAllToken, idOrError.Error!);
         string id = idOrError.Value!;
 
-        IOPath dataFilePath = PathHelper.GetParsedSaveFilePath(id);
+        var meta = await Program.DB.GetMetadata(id);
+        if(meta is null)
+            return await ReturnHelper.ResponseError(ctx, requestLogger, _cancelAllToken, 
+                new ErrorMessage(HttpStatusCode.NotFound,
+                    $"Save with id {id} not found"));
+        if(meta.status != SaveFileProcessingStatus.Done)
+            return await ReturnHelper.ResponseError(ctx, requestLogger, _cancelAllToken, 
+                new ErrorMessage(HttpStatusCode.BadRequest,
+                    $"Save with id {id} has status {meta.status}"));
+        
+        IOPath dataFilePath = meta.GetParsedDataPath();
         if (!File.Exists(dataFilePath))
             return await ReturnHelper.ResponseError(ctx, requestLogger, _cancelAllToken,
                 new ErrorMessage(HttpStatusCode.InternalServerError, 

ParadoxSaveParser.WebAPI/Routes/GetSaveStatusHandler.cs

@@ -18,7 +18,8 @@ internal class GetSaveStatusHandler : RouteHandlerBase
             return await ReturnHelper.ResponseError(ctx, requestLogger, _cancelAllToken, idOrError.Error!);
         string id = idOrError.Value!;
 
-        if (!Program._saveMetadataStorage.TryGetValue(id, out var meta))
+        var meta = await Program.DB.GetMetadata(id);
+        if (meta is null)
             return await ReturnHelper.ResponseError(ctx, requestLogger, _cancelAllToken,
                 new ErrorMessage(HttpStatusCode.InternalServerError, 
                     $"Save with id {id} not found")

ParadoxSaveParser.WebAPI/Routes/UploadSaveHandler.cs

@@ -1,23 +1,25 @@
 using System.Linq;
 using System.Net;
 using ParadoxSaveParser.WebAPI.BackgroundTasks;
+using ParadoxSaveParser.WebAPI.Database;
 using ParadoxSaveParser.WebAPI.HttpHelpers;
+using ParadoxSaveParser.WebAPI.SaveDataFilters;
 
 namespace ParadoxSaveParser.WebAPI.Routes;
 
 public class UploadSaveHandler : RouteHandlerBase
 {
     private readonly BackgroundJobManager _bgJobManager;
-    private readonly Dictionary<Game, ISearchExpression> _searchQueries;
+    private readonly Dictionary<Game, ISaveDataFilter> _saveFilters;
 
     public UploadSaveHandler(
         CancellationToken cancelAllToken, 
         BackgroundJobManager bgJobManager,
-        Dictionary<Game, ISearchExpression> searchQueries) 
+        Dictionary<Game, ISaveDataFilter> saveFilters) 
         : base(cancelAllToken)
     {
         _bgJobManager = bgJobManager;
-        _searchQueries = searchQueries;
+        _saveFilters = saveFilters;
     }
 
     public override async Task<HttpStatusCode> HandleRequest(
@@ -27,34 +29,28 @@ public class UploadSaveHandler : RouteHandlerBase
         if (contentType != "application/octet-stream")
             return await ReturnHelper.ResponseError(ctx, requestLogger, _cancelAllToken,
                     new ErrorMessage(HttpStatusCode.BadRequest,
-                $"Invalid request Content-Type: '{contentType}'")
+                $"Invalid request Content-Type: '{contentType}'"));
-                    );
 
-        string saveId = Guid.NewGuid().ToString();
+        var gameStrOrError = RequestHelper.GetQueryValue(ctx, "game");
-        var metaFilePath = PathHelper.GetMetaFilePath(saveId);
+        if (gameStrOrError.HasError)
-        if (File.Exists(metaFilePath))
+            return await ReturnHelper.ResponseError(ctx, requestLogger, _cancelAllToken, gameStrOrError.Error!);
+
+        if (!Enum.TryParse(gameStrOrError.Value, ignoreCase: true, out Game game))
             return await ReturnHelper.ResponseError(ctx, requestLogger, _cancelAllToken,
-                    new ErrorMessage(HttpStatusCode.InternalServerError,
+                new ErrorMessage(HttpStatusCode.BadRequest,
-                $"Guid collision! file' {metaFilePath}' already exists.")
+                    $"Invalid requested game: '{gameStrOrError.Value}'"));  
-                    );
+        var meta = await Program.DB.CreateMetadata(game);
 
-        var meta = new SaveFileMetadata
+        var saveFilePath = meta.GetSaveFilePath();
-            { id = saveId, game = Game.EU4, status = SaveFileProcessingStatus.Initialized };
+        await using (var saveFile = File.OpenWrite(saveFilePath))
-        if (!Program._saveMetadataStorage.TryAdd(saveId, meta))
+        {
-            return await ReturnHelper.ResponseError(ctx, requestLogger, _cancelAllToken,
+            await using (var remoteStream = ctx.Request.InputStream)
-                    new ErrorMessage(HttpStatusCode.InternalServerError,
+                await remoteStream.CopyToAsync(saveFile, _cancelAllToken);
-                $"Guid collision! Can't create metadata with id {saveId}")
+        }
-                    );
+        await Program.DB.UpdateMetadataStatus(meta, SaveFileProcessingStatus.Uploaded);
 
-        meta.status = SaveFileProcessingStatus.Uploading;
+        _bgJobManager.StartNewParsingOperation(meta, _saveFilters[meta.game], _cancelAllToken);
-        var saveFilePath = PathHelper.GetSaveFilePath(meta.id);
+        dynamic responseData = new { meta.id };
-        await using var saveFile = File.OpenWrite(saveFilePath);
-        await using var remoteStream = ctx.Request.InputStream;
-        await remoteStream.CopyToAsync(saveFile, _cancelAllToken);
-        meta.status = SaveFileProcessingStatus.Uploaded;
-
-        _bgJobManager.StartNewParsingOperation(meta, _searchQueries[meta.game], _cancelAllToken);
-        dynamic responseData = new { saveId };
         return await ReturnHelper.ResponseJson(ctx, requestLogger, _cancelAllToken, responseData);
     }
 }

ParadoxSaveParser.WebAPI/SaveDataFilters/ISaveDataFilter.cs

@@ -0,0 +1,9 @@
+namespace ParadoxSaveParser.WebAPI.SaveDataFilters;
+
+public interface ISaveDataFilter
+{
+    public string SearchString { get; }
+    public ISearchExpression SearchExpression { get; }
+    
+    public void Apply(Dictionary<string, object> data);
+}

ParadoxSaveParser.WebAPI/SaveDataFilters/SaveFilterEU4.cs

@@ -0,0 +1,48 @@
+using System.Linq;
+using ParsedDict = System.Collections.Generic.Dictionary<string, object>;
+
+namespace ParadoxSaveParser.WebAPI.SaveDataFilters;
+
+public class SaveDataFilterEU4 : ISaveDataFilter
+{
+    public string SearchString { get; }
+    public ISearchExpression SearchExpression { get; }
+    
+    public SaveDataFilterEU4()
+    {
+        SearchString =
+            """
+            (
+                active_war|
+                previous_war|
+                income_statistics|
+                nation_size_statistics|
+                inflation_statistics|
+                countries.(
+                    ---.~|REB.~|PIR.~|NAT.~|
+                    *.(
+                        flags.~|hidden_flags.~|variables.~|estate.~|active_agenda.~|
+                        power_projection.~|ai.~|history.~|navy.~|army.~|mercenary_company.~|
+                        active_relations.~|border_pct.~|border_sit.~|border_provinces.~|
+                        neighbours.~|home_neighbours.~|core_neighbours.~|inflation_history.~|
+                        opinion_cache.~|owned_provinces.~|controlled_provinces.~|core_provinces.~|
+                        claim_provinces.~|leader.~|*
+                    )
+                )
+            )
+            """
+            .Replace("\r", "").Replace("\n", "").Replace("\t", "").Replace(" ", "");
+        SearchExpression = SearchExpressionCompiler.Compile(SearchString);
+    }
+
+    
+    public void Apply(ParsedDict data)
+    {
+        var countries = (ParsedDict)data["countries"];
+        var countries_filtered = countries.Where(pair 
+            => ((ParsedDict)pair.Value).TryGetValue("raw_development", out var raw_development)
+               && (double)raw_development > 0
+            ).ToDictionary();
+        data["countries"] = countries_filtered;
+    }
+}

ParadoxSaveParser.WebAPI/SaveDataFilters/data_filtering_EU4.txt

@@ -0,0 +1,43 @@
+countries
+	filter:
+		always: exists (has raw_development && raw_development != 0)
+		optional: is player (was_player == yes)
+	exclude:
+		flags
+		hidden_flags
+		variables
+		estate
+		active_agenda
+		power_projection
+		ai
+		history
+		navy
+		army
+		mercenary_company
+		active_relations
+		border_pct
+		border_sit
+		border_provinces
+		neighbours
+		home_neighbours
+		core_neighbours
+		inflation_history
+		opinion_cache
+		owned_provinces
+		controlled_provinces
+		core_provinces
+		claim_provinces
+		leader
+	query:
+		countries.(---.~|REB.~|PIR.~|NAT.~|*.(flags.~|hidden_flags.~|variables.~|estate.~|active_agenda.~|power_projection.~|ai.~|history.~|navy.~|army.~|mercenary_company.~|active_relations.~|border_pct.~|border_sit.~|border_provinces.~|neighbours.~|home_neighbours.~|core_neighbours.~|inflation_history.~|opinion_cache.~|owned_provinces.~|controlled_provinces.~|core_provinces.~|claim_provinces.~|leader.~|*))
+
+active_war
+	filter:
+		optional: only player wars
+previous_war
+	filter:
+		optional: only player wars
+		always: not fictive (has losses and lasts long)
+income_statistics
+nation_size_statistics
+inflation_statistics

ParadoxSaveParser.WebAPI/SaveFileMetadata.cs

@@ -1,45 +0,0 @@
-using System.Text.Json.Serialization;
-
-namespace ParadoxSaveParser.WebAPI;
-
-public enum SaveFileProcessingStatus
-{
-    Initialized,
-    Uploading,
-    Uploaded,
-    Parsing,
-    SavingResults,
-    Done
-}
-
-public enum Game
-{
-    Unknown,
-    EU4
-}
-
-public class SaveFileMetadata
-{
-    private static readonly JsonSerializerOptions _configSerializerOptions = new()
-    {
-        WriteIndented = true,
-        DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull,
-    };
-    public required string id { get; init; }
-
-    [JsonConverter(typeof(JsonStringEnumConverter))]
-    public required Game game { get; init; }
-
-    [JsonConverter(typeof(JsonStringEnumConverter))]
-    public required SaveFileProcessingStatus status { get; set; }
-    
-    // if error occured during parsing, it's message is saved here
-    // status stays the same as when error occured
-    public string? errorMessage { get; set; }
-
-    public void SaveToFile()
-    {
-        using var metaFile = File.OpenWrite(PathHelper.GetMetaFilePath(id));
-        JsonSerializer.Serialize(metaFile, this, _configSerializerOptions);
-    }
-}

README.md

@@ -14,3 +14,5 @@ Yet another save files parser.
 - **[ParadoxSaveParser.WebAPI](./ParadoxSaveParser.WebAPI)** - 
     Backend for my save file analytics website (TODO: add repo link).
 
+## Building
+1. Install protobuf compiler https://protobuf.dev/installation/

TODO.md

@@ -1,8 +1,4 @@
-## WebAPI:
-	Temp files management system
-	Database to store metadata (SQLite-Net Extensions)
-
 ## WebAPI.SaveParsingOperation:
-	Add debug log
 	Save parsed data in protobuf
 	Re-parse if saved data was parsed with another query
+    Implement automatic database cleanup