rework messages

+ addition LocalStorageService
+ tests

Govor.API/Services/LocalStorageService.cs

@@ -0,0 +1,61 @@
+namespace Govor.API.Services;
+
+public class LocalStorageService : IStorageService
+{
+    private readonly string _storagePath;
+
+    public LocalStorageService(IWebHostEnvironment hostingEnvironment)
+    {
+        _storagePath = Path.Combine(hostingEnvironment.ContentRootPath, "uploads");
+        
+        if (!Directory.Exists(_storagePath))
+        {
+            Directory.CreateDirectory(_storagePath);
+        }
+    }
+    
+    public async Task<string> SaveAsync(byte[] data, string fileName)
+    {
+        if(data is null || data.Length == 0) 
+            throw new ArgumentException("Invalid file", nameof(data));
+        
+        if(fileName is null || fileName.Length == 0)
+            throw new ArgumentException("Invalid file name", nameof(fileName));
+        
+        var date = DateTime.UtcNow.ToString("yyyy/MM");
+        
+        var folder = Path.Combine(_storagePath, date);
+        Directory.CreateDirectory(folder);
+        
+        var uniqueFileName = $"{Guid.NewGuid()}_{Path.GetFileName(fileName)}";
+        var fullPath = Path.Combine(folder, uniqueFileName);
+        
+        await using var stream = new FileStream(fullPath, FileMode.Create);
+        stream.WriteAsync(data, 0, data.Length);
+        
+        return Path.Combine(date, uniqueFileName);
+    }
+
+    public async Task<Stream> LoadAsync(string url)
+    {
+        var filePath = Path.Combine(_storagePath, Path.GetFileName(url));
+
+        if (!File.Exists(filePath))
+            throw new FileNotFoundException("File not found.", filePath);
+        
+        await using var file = new FileStream(filePath, FileMode.Open, FileAccess.Read);
+        return file;
+    }
+
+    public async Task RemoveAsync(string url)
+    {
+        var path = Path.Combine(_storagePath, Path.GetFileName(url));
+        
+        if (File.Exists(path))
+        {
+            File.Delete(path);
+        }
+        
+        await Task.CompletedTask;
+    }
+}