Initial commit: Lagerbestand Blazor Projekt

Lagerbestand/Models/KanbanTaskAttachment.cs

@@ -0,0 +1,96 @@
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace Lagerbestand.Models;
+
+/// <summary>
+/// Represents a file attachment on a Kanban task
+/// </summary>
+public class KanbanTaskAttachment
+{
+    public Guid Id { get; set; } = Guid.NewGuid();
+
+    public Guid TaskId { get; set; }
+
+    [Required]
+    [MaxLength(255)]
+    public string FileName { get; set; } = string.Empty;
+
+    [Required]
+    [MaxLength(100)]
+    public string ContentType { get; set; } = "application/octet-stream";
+
+    /// <summary>
+    /// File size in bytes
+    /// </summary>
+    public long FileSize { get; set; }
+
+    /// <summary>
+    /// Relative path to the file in the storage system (NFS/disk)
+    /// </summary>
+    [MaxLength(500)]
+    public string? FilePath { get; set; }
+
+    /// <summary>
+    /// Legacy: File content stored as binary (being migrated to file-based storage)
+    /// </summary>
+    [Obsolete("Use FilePath instead. This property is retained for migration purposes only.")]
+    public byte[]? FileContent { get; set; }
+
+    /// <summary>
+    /// User who uploaded the file
+    /// </summary>
+    public Guid? UploadedByUserId { get; set; }
+
+    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+
+    // Navigation properties
+    public virtual KanbanTask? Task { get; set; }
+    public virtual AppUser? UploadedByUser { get; set; }
+
+    // Computed properties
+    [NotMapped]
+    public string FileSizeDisplay
+    {
+        get
+        {
+            if (FileSize < 1024) return $"{FileSize} B";
+            if (FileSize < 1024 * 1024) return $"{FileSize / 1024.0:F1} KB";
+            return $"{FileSize / (1024.0 * 1024.0):F1} MB";
+        }
+    }
+
+    [NotMapped]
+    public string FileIcon
+    {
+        get
+        {
+            var ext = Path.GetExtension(FileName).ToLowerInvariant();
+            return ext switch
+            {
+                ".pdf" => "📄",
+                ".doc" or ".docx" => "📝",
+                ".xls" or ".xlsx" => "📊",
+                ".ppt" or ".pptx" => "📽️",
+                ".jpg" or ".jpeg" or ".png" or ".gif" or ".webp" => "🖼️",
+                ".zip" or ".rar" or ".7z" => "📦",
+                ".txt" => "📃",
+                _ => "📎"
+            };
+        }
+    }
+
+    [NotMapped]
+    public bool IsImage => ContentType.StartsWith("image/");
+
+    /// <summary>
+    /// Whether the file is stored on disk (vs legacy database storage)
+    /// </summary>
+    [NotMapped]
+    public bool IsFileBasedStorage => !string.IsNullOrEmpty(FilePath);
+
+    /// <summary>
+    /// Maximum file size allowed (10 MB)
+    /// </summary>
+    public const long MaxFileSize = 10 * 1024 * 1024;
+}