Restructure

1 files changed, 67 insertions, 0 deletions

diff --git a/lib/VNLib.Plugins.Extensions.Data/src/Storage/BlobExtensions.cs b/lib/VNLib.Plugins.Extensions.Data/src/Storage/BlobExtensions.cs
new file mode 100644
index 0000000..468a66d
--- /dev/null
+++ b/lib/VNLib.Plugins.Extensions.Data/src/Storage/BlobExtensions.cs
@@ -0,0 +1,67 @@
+/*
+* Copyright (c) 2022 Vaughn Nugent
+* 
+* Library: VNLib
+* Package: VNLib.Plugins.Extensions.Data
+* File: BlobExtensions.cs 
+*
+* BlobExtensions.cs is part of VNLib.Plugins.Extensions.Data which is part of the larger 
+* VNLib collection of libraries and utilities.
+*
+* VNLib.Plugins.Extensions.Data is free software: you can redistribute it and/or modify 
+* it under the terms of the GNU General Public License as published
+* by the Free Software Foundation, either version 2 of the License,
+* or (at your option) any later version.
+*
+* VNLib.Plugins.Extensions.Data is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 
+* General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License 
+* along with VNLib.Plugins.Extensions.Data. If not, see http://www.gnu.org/licenses/.
+*/
+
+using System;
+
+using VNLib.Utils;
+
+namespace VNLib.Plugins.Extensions.Data.Storage
+{
+    public static class BlobExtensions
+    {
+        public const string USER_ID_ENTRY = "__.uid";
+        public const string VERSION_ENTRY = "__.vers";
+
+        private const string FILE_SIZE = "__.size";
+        private const string FILE_NAME = "__.name";
+        private const string ERROR_FLAG = "__.err";
+
+        public static string GetUserId(this Blob blob) => blob[USER_ID_ENTRY];
+        /// <summary>
+        /// Gets the <see cref="Version"/> stored in the current <see cref="Blob"/>
+        /// </summary>
+        /// <returns>The sored version if previously set, thows otherwise</returns>
+        /// <exception cref="FormatException"></exception>
+        public static Version GetVersion(this Blob blob) => Version.Parse(blob[VERSION_ENTRY]);
+        /// <summary>
+        /// Sets a <see cref="Version"/> for the current <see cref="Blob"/>
+        /// </summary>
+        /// <param name="blob"></param>
+        /// <param name="version">The <see cref="Version"/> of the <see cref="Blob"/></param>
+        public static void SetVersion(this Blob blob, Version version) => blob[VERSION_ENTRY] = version.ToString();
+
+        /// <summary>
+        /// Gets a value indicating if the last operation left the <see cref="Blob"/> in an undefined state
+        /// </summary>
+        /// <returns>True if the <see cref="Blob"/> state is undefined, false otherwise</returns>
+        public static bool IsError(this Blob blob) => bool.TrueString.Equals(blob[ERROR_FLAG]);
+        internal static void IsError(this LWStorageDescriptor blob, bool value) => blob[ERROR_FLAG] = value ? bool.TrueString : null;
+
+        internal static long GetLength(this LWStorageDescriptor blob) => (blob as IObjectStorage).GetObject<long>(FILE_SIZE);
+        internal static void SetLength(this LWStorageDescriptor blob, long length) => (blob as IObjectStorage).SetObject(FILE_SIZE, length);
+
+        internal static string GetName(this LWStorageDescriptor blob) => blob[FILE_NAME];
+        internal static string SetName(this LWStorageDescriptor blob, string filename) => blob[FILE_NAME] = filename;
+    }
+}
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