CLI zip file extract to memory

ParadoxSaveParser.CLI/Modes.cs

@@ -1,5 +1,9 @@
-using System.Text.Json;
+using System.IO;
+using System.IO.Compression;
+using System.Linq;
+using System.Text.Json;
 using ParadoxSaveParser.Lib;
+using Path = DTLib.Filesystem.Path;
 
 namespace ParadoxSaveParser.CLI;
 
@@ -12,18 +16,41 @@ internal static class Modes
 {
     internal static void Search(string searchQuery, IOPath inputPath, IOPath? outputPath)
     {
-        using var inputStream = File.OpenRead(inputPath);
-        
-        using var outputStream = outputPath is null
-            ? Console.OpenStandardOutput()
-            : File.OpenWrite(outputPath.Value);
-        
-        var searchExpression = SearchExpressionCompiler.Compile(searchQuery);
-        
-        var parser = new SaveParserEU4(inputStream, searchExpression);
-        var parsedValue = parser.Parse();
-        JsonSerializer.Serialize(outputStream, parsedValue, ParsedValueJsonContext.Default.DictionaryStringListObject);
-        outputStream.WriteByte((byte)'\n');
+        Stream inputStream = File.OpenRead(inputPath);
+        try
+        {
+            byte[] head4 = new byte[4];
+            inputStream.ReadExactly(head4);
+            inputStream.Seek(0, SeekOrigin.Begin);
+            if (head4.SequenceEqual<byte>([(byte)'P', (byte)'K', 3, 4]))
+            {
+                var zipArchive = new ZipArchive(inputStream, ZipArchiveMode.Read);
+                var zipEntry = zipArchive.Entries.FirstOrDefault(e => e.Name == "gamestate");
+                if (zipEntry is null)
+                    throw new Exception("'gamestate' file not found in zip archive");
+                var unzipped = new MemoryStream((int)zipEntry.Length);
+                zipEntry.Open().CopyTo(unzipped);
+                zipArchive.Dispose(); // closes inputStream
+                unzipped.Seek(0, SeekOrigin.Begin);
+                inputStream = unzipped;
+            }
+
+            using var outputStream = outputPath is null
+                ? Console.OpenStandardOutput()
+                : File.OpenWrite(outputPath.Value);
+
+            var searchExpression = SearchExpressionCompiler.Compile(searchQuery);
+
+            var parser = new SaveParserEU4(inputStream, searchExpression);
+            var parsedValue = parser.Parse();
+            JsonSerializer.Serialize(outputStream, parsedValue,
+                ParsedValueJsonContext.Default.DictionaryStringListObject);
+            outputStream.WriteByte((byte)'\n');
+        }
+        finally
+        {
+            inputStream.Dispose();
+        }
     }
     
     internal static void Interactive()

TODO.txt

@@ -1,6 +1,3 @@
-Parser.CLI:
-	Temp files management system
-
 Main:
 	Temp files management system
 	Database???
@@ -11,4 +8,3 @@ ParseSaveHandler:
 	Add debug log
 	Save parsed data in protobuf
 	Re-parse if saved data was parsed with another query
-