Add Customizable Output Filename Formatting

Core/Data/GlobalSettings.cs

@@ -17,6 +17,11 @@ internal class GlobalConfig
     /// GlobalSettings.DefaultOutputDirectory. Ignored while the directory does not exist (see EffectiveOutputDirectory).
     /// </summary>
     public string? OutputDirectory { get; set; }
+    /// <summary>
+    /// File name format template chosen in the render configuration window; null or empty selects
+    /// GlobalSettings.DefaultFileNameFormat ("{date} {time}").
+    /// </summary>
+    public string? FileNameFormat { get; set; }
     /// <summary>Name of the preset last selected or saved in the render configuration window; selected again when it opens.</summary>
     public string? LastPresetName { get; set; }
     /// <summary>
@@ -72,6 +77,18 @@ internal static class GlobalSettings
         }
     }
 
+    /// <summary>Default file name format template: "{date} {time}".</summary>
+    public const string DefaultFileNameFormat = "{date} {time}";
+
+    /// <summary>
+    /// File name format used for renders without an explicit output path: Current.FileNameFormat when it is set,
+    /// otherwise <see cref="DefaultFileNameFormat"/>.
+    /// </summary>
+    public static string EffectiveFileNameFormat =>
+        string.IsNullOrWhiteSpace(Current.FileNameFormat)
+            ? DefaultFileNameFormat
+            : Current.FileNameFormat;
+
     static GlobalSettings()
     {
         Load();

Core/RenderManager.cs

@@ -1053,9 +1053,20 @@ internal class RenderManager : MonoBehaviour
         var startTime = DateTime.Now;
         if (RenderContext.OutputPath != null) CurrentOutPath = RenderContext.OutputPath;
         else {
-            var fileName = startTime.ToString("yyyy-MM-dd HH-mm-ss") +
-                           $".{Configuration.AdvancedConfig.FileExtension.TrimStart('.').ToLower()}";
-            CurrentOutPath = Path.Combine(GlobalSettings.EffectiveOutputDirectory, fileName);
+            var format = GlobalSettings.EffectiveFileNameFormat;
+            var ext = Configuration.AdvancedConfig.FileExtension;
+            var baseName = RenderFileNameUtil.FormatFileName(
+                format,
+                startTime,
+                Configuration,
+                GlobalSettings.Current.LastPresetName,
+                levelPath
+            );
+            CurrentOutPath = RenderFileNameUtil.GetUniqueFilePath(
+                GlobalSettings.EffectiveOutputDirectory,
+                baseName,
+                ext
+            );
         }
 
         FFmpegNativeEncoder? videoFFmpeg = null;