compress parsed data to .json.zst

ParadoxSaveParser.WebAPI/Config.cs

@@ -1,4 +1,5 @@
 using System.Text.Json.Serialization;
+using ZstdSharp;
 
 namespace ParadoxSaveParser.WebAPI;
 
@@ -11,13 +12,21 @@ public class Config
     public int UploadLifetimeDays { get; set; } = 30;
     public string DbPath { get; set; } = "database.sqlite";
     public SaveUploadConfig SaveUpload { get; set; } = new();
+    /// level used to compress parsed save data
+    public int ZstdCompressionLevel { get; set; } = 10;
 
     public class SaveUploadConfig
     {
-        /// max size of game data entry after decompression
-        public long MaxSizePlainTextBytes { get; set; } = 200 * 1024 * 1024;
-        /// max size of uploaded .tar.zst
-        public long MaxSizeCompressedBytes { get; set; } = 60 * 1024 * 1024;
+        /// max size of game data entry after decompression, in MiB
+        public int MaxSizePlainTextMegabytes { get; set; } = 200;
+        /// max size of uploaded .tar.zst, in MiB
+        public int MaxSizeCompressedMegabytes { get; set; } = 60;
+
+        // long, because int overflows at 2048 MiB
+        [JsonIgnore]
+        public long MaxSizePlainTextBytes => MaxSizePlainTextMegabytes * 1024L * 1024L;
+        [JsonIgnore]
+        public long MaxSizeCompressedBytes => MaxSizeCompressedMegabytes * 1024L * 1024L;
     }
 
     public static JsonSerializerOptions JsonOptions = new()
@@ -35,6 +44,11 @@ public class Config
             throw new Exception($"config is obsolete (config v{cfg.Version} < program v{ActualVersion})");
         if (cfg.Version > ActualVersion)
             throw new Exception($"program is obsolete (config v{cfg.Version} > program v{ActualVersion})");
+        // fail on start instead of on first parsed save
+        if (cfg.ZstdCompressionLevel < Compressor.MinCompressionLevel
+            || cfg.ZstdCompressionLevel > Compressor.MaxCompressionLevel)
+            throw new Exception($"{nameof(ZstdCompressionLevel)} must be in range "
+                + $"[{Compressor.MinCompressionLevel}, {Compressor.MaxCompressionLevel}]");
         return cfg;
     }