♻️ Proper folder system to index

DysonNetwork.Shared/Models/CloudFileIndex.cs

@@ -1,30 +1,70 @@
 using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations.Schema;
+using System.Text.Json.Serialization;
 using Microsoft.EntityFrameworkCore;
 
 namespace DysonNetwork.Shared.Models;
 
-[Index(nameof(Path), nameof(AccountId))]
+[Index(nameof(FolderId), nameof(AccountId))]
+[Index(nameof(FileId))]
 public class SnCloudFileIndex : ModelBase
 {
-    public Guid Id { get; init; } = Guid.NewGuid();
+    public Guid Id { get; set; } = Guid.NewGuid();
 
     /// <summary>
-    /// The path of the file,
-    /// only store the parent folder.
-    /// With the trailing slash.
-    ///
-    /// Like /hello/here/ not /hello/here/text.txt or /hello/here
-    /// Or the user home folder files, store as /
-    ///
-    /// Besides, the folder name should be all query-safe, not contains % or
-    /// other special characters that will mess up the pgsql query
+    /// Reference to the folder containing this file
     /// </summary>
-    [MaxLength(8192)]
-    public string Path { get; init; } = null!;
+    public Guid FolderId { get; init; }
+
+    /// <summary>
+    /// Navigation property to the folder
+    /// </summary>
+    [JsonIgnore]
+    public SnCloudFolder Folder { get; init; } = null!;
 
     [MaxLength(32)] public string FileId { get; init; } = null!;
     public SnCloudFile File { get; init; } = null!;
     public Guid AccountId { get; init; }
     [NotMapped] public SnAccount? Account { get; init; }
+
+    /// <summary>
+    /// Cached full path of the file (stored in database for performance)
+    /// </summary>
+    [MaxLength(2048)]
+    public string Path { get; set; } = null!;
+
+    /// <summary>
+    /// Creates a new file index with the specified folder and file
+    /// </summary>
+    public static SnCloudFileIndex Create(SnCloudFolder folder, SnCloudFile file, Guid accountId)
+    {
+        // Build the full path by traversing the folder hierarchy
+        var pathSegments = new List<string>();
+        var currentFolder = folder;
+
+        while (currentFolder != null)
+        {
+            if (!string.IsNullOrEmpty(currentFolder.Name))
+            {
+                pathSegments.Insert(0, currentFolder.Name);
+            }
+            currentFolder = currentFolder.ParentFolder;
+        }
+
+        // Add the file name
+        if (!string.IsNullOrEmpty(file.Name))
+        {
+            pathSegments.Add(file.Name);
+        }
+
+        var fullPath = "/" + string.Join("/", pathSegments);
+
+        return new SnCloudFileIndex
+        {
+            FolderId = folder.Id,
+            FileId = file.Id,
+            AccountId = accountId,
+            Path = fullPath
+        };
+    }
 }