Merge branch 'dev'

Moves media type extension definitions to a centralized constant class.

This improves code maintainability and readability by consolidating
the list of media type extensions into a dedicated class. It also
removes the need for `.ToLowerInvariant()` call on every file extension
check, since the HashSet itself is instantiated with case-insensitive comparer.

LiquidCode/Domain/Services/MediaService.cs

@@ -1,6 +1,7 @@
 using LiquidCode.Domain.Enums;
 using LiquidCode.Domain.Interfaces.Services;
 using LiquidCode.Infrastructure.External.S3;
+using LiquidCode.Shared.Constants;
 using Microsoft.Extensions.Logging;
 
 namespace LiquidCode.Domain.Services;
@@ -69,14 +70,15 @@ public class MediaService : IMediaService
 
     public MediaType GetMediaType(string fileName)
     {
-        var extension = Path.GetExtension(fileName).ToLowerInvariant();
+        var extension = Path.GetExtension(fileName);
+        
         return extension switch
         {
-            ".jpg" or ".jpeg" or ".png" or ".gif" or ".bmp" or ".tiff" or ".webp" => MediaType.Images,
+            _ when MediaTypeExtensions.ImageExtensions.Contains(extension) => MediaType.Images,
-            ".mp4" or ".avi" or ".mkv" or ".mov" or ".wmv" or ".flv" or ".webm" => MediaType.Videos,
+            _ when MediaTypeExtensions.VideoExtensions.Contains(extension) => MediaType.Videos,
-            ".mp3" or ".wav" or ".flac" or ".aac" or ".ogg" or ".wma" => MediaType.Audio,
+            _ when MediaTypeExtensions.AudioExtensions.Contains(extension) => MediaType.Audio,
-            ".zip" or ".rar" or ".7z" or ".tar" or ".gz" or ".bz2" => MediaType.Archives,
+            _ when MediaTypeExtensions.ArchiveExtensions.Contains(extension) => MediaType.Archives,
-            ".txt" or ".md" or ".markdown" or ".tex" or ".latex" => MediaType.Documents,
+            _ when MediaTypeExtensions.DocumentExtensions.Contains(extension) => MediaType.Documents,
             _ => MediaType.Other
         };
     }

LiquidCode/Shared/Constants/MediaTypeExtensions.cs

@@ -0,0 +1,74 @@
+namespace LiquidCode.Shared.Constants;
+
+/// <summary>
+/// Константы для определения типов медиа файлов
+/// </summary>
+public static class MediaTypeExtensions
+{
+    /// <summary>
+    /// Расширения для изображений
+    /// </summary>
+    public static readonly HashSet<string> ImageExtensions = new(StringComparer.OrdinalIgnoreCase)
+    {
+        ".jpg",
+        ".jpeg",
+        ".png",
+        ".gif",
+        ".bmp",
+        ".tiff",
+        ".webp"
+    };
+
+    /// <summary>
+    /// Расширения для видео
+    /// </summary>
+    public static readonly HashSet<string> VideoExtensions = new(StringComparer.OrdinalIgnoreCase)
+    {
+        ".mp4",
+        ".avi",
+        ".mkv",
+        ".mov",
+        ".wmv",
+        ".flv",
+        ".webm"
+    };
+
+    /// <summary>
+    /// Расширения для аудио
+    /// </summary>
+    public static readonly HashSet<string> AudioExtensions = new(StringComparer.OrdinalIgnoreCase)
+    {
+        ".mp3",
+        ".wav",
+        ".flac",
+        ".aac",
+        ".ogg",
+        ".wma"
+    };
+
+    /// <summary>
+    /// Расширения для архивов
+    /// </summary>
+    public static readonly HashSet<string> ArchiveExtensions = new(StringComparer.OrdinalIgnoreCase)
+    {
+        ".zip",
+        ".rar",
+        ".7z",
+        ".tar",
+        ".gz",
+        ".bz2"
+    };
+
+    /// <summary>
+    /// Расширения для текстовых документов (включая JSON)
+    /// </summary>
+    public static readonly HashSet<string> DocumentExtensions = new(StringComparer.OrdinalIgnoreCase)
+    {
+        ".txt",
+        ".md",
+        ".markdown",
+        ".tex",
+        ".latex",
+        ".json"
+    };
+}