FileDatabase refactor for normalization and consistency

DeepDrftContent/FileDatabase/Models/IIndex.cs

@@ -1,7 +1,7 @@
 namespace DeepDrftContent.FileDatabase.Models;
 
 /// <summary>
-/// Base interface for all index types
+/// Base interface for all index types - minimal contract
 /// </summary>
 public interface IIndex
 {
@@ -9,7 +9,13 @@ public interface IIndex
     /// Gets the key identifier for this index
     /// </summary>
     string GetKey();
+}
 
+/// <summary>
+/// Interface for indexes that support entry queries
+/// </summary>
+public interface IEntryQueryable : IIndex
+{
     /// <summary>
     /// Gets all entry keys in this index
     /// </summary>
@@ -25,3 +31,30 @@ public interface IIndex
     /// </summary>
     bool HasEntry(EntryKey entryKey);
 }
+
+/// <summary>
+/// Interface for indexes that support directory operations
+/// </summary>
+public interface IDirectoryIndex : IEntryQueryable
+{
+    /// <summary>
+    /// Adds an entry to the directory index
+    /// </summary>
+    void PutEntry(EntryKey entryKey);
+}
+
+/// <summary>
+/// Interface for indexes that support vault operations with metadata
+/// </summary>
+public interface IVaultIndex : IEntryQueryable
+{
+    /// <summary>
+    /// Gets metadata for a specific entry
+    /// </summary>
+    MetaData? GetEntry(EntryKey entryKey);
+
+    /// <summary>
+    /// Adds an entry with metadata to the vault index
+    /// </summary>
+    void PutEntry(EntryKey entryKey, MetaData metaData);
+}