2 files changed, 115 insertions, 1 deletions
diff --git a/back-end/src/Endpoints/BookmarkEndpoint.cs b/back-end/src/Endpoints/BookmarkEndpoint.cs
index ec46097..05b72d0 100644
--- a/back-end/src/Endpoints/BookmarkEndpoint.cs
+++ b/back-end/src/Endpoints/BookmarkEndpoint.cs
@@ -30,7 +30,9 @@ using FluentValidation.Results;
 using Microsoft.EntityFrameworkCore;
 
 using VNLib.Utils;
-using VNLib.Utils.Logging;
+using VNLib.Utils.IO;
+using VNLib.Utils.Memory;
+using VNLib.Net.Http;
 using VNLib.Plugins;
 using VNLib.Plugins.Essentials;
 using VNLib.Plugins.Essentials.Accounts;
@@ -113,6 +115,41 @@ namespace SimpleBookmark.Endpoints
                 return VirtualOk(entity, webm);
             }
 
+            /*
+             * Allow exporting the current user's bookmark collection as a 
+             * netscape file for compatability.
+             * 
+             * Future support for CSV file via an accept content type header
+             */
+            if(entity.QueryArgs.ContainsKey("export"))
+            {
+                if (entity.Server.Accepts(ContentType.Html))
+                {
+                    //Get the collection of bookmarks
+                    List<BookmarkEntry> list = Bookmarks.ListRental.Rent();
+                    await Bookmarks.GetUserPageAsync(list, entity.Session.UserID, 0, (int)BmConfig.PerPersonQuota);
+
+                    //Alloc memory stream for output
+                    VnMemoryStream output = new(MemoryUtil.Shared, 16 * 1024, false);
+                    try
+                    {
+                        //Write the bookmarks as a netscape file and return the file
+                        ImportExportUtil.ExportToNetscapeFile(list, output);
+                        output.Seek(0, System.IO.SeekOrigin.Begin);
+                        return VirtualClose(entity, HttpStatusCode.OK, ContentType.Html, output);
+                    }
+                    catch
+                    {
+                        output.Dispose();
+                        throw;
+                    }
+                }
+                else
+                {
+                    return VirtualClose(entity, HttpStatusCode.NotAcceptable);
+                }
+            }
+
             //Get query parameters
             _ = entity.QueryArgs.TryGetNonEmptyValue("limit", out string? limitS);
             _ = uint.TryParse(limitS, out uint limit);
diff --git a/back-end/src/ImportExportUtil.cs b/back-end/src/ImportExportUtil.cs
new file mode 100644
index 0000000..3610ef6
--- /dev/null
+++ b/back-end/src/ImportExportUtil.cs
@@ -0,0 +1,77 @@
+// Copyright (C) 2024 Vaughn Nugent
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program 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 Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+using System;
+using System.IO;
+using SimpleBookmark.Model;
+using System.Collections.Generic;
+using VNLib.Utils.IO;
+
+
+
+namespace SimpleBookmark
+{
+    internal static class ImportExportUtil
+    {
+        /// <summary>
+        /// Exports a colletion of bookmarks to a netscape bookmark file
+        /// </summary>
+        /// <param name="bookmarks">The bookmark collection to export</param>
+        /// <param name="outputStream">The bookmark output stream to write data to</param>
+        public static void ExportToNetscapeFile(IEnumerable<BookmarkEntry> bookmarks, Stream outputStream)
+        {
+            using VnStreamWriter writer = new(outputStream, System.Text.Encoding.UTF8, 1024)
+            {
+                NewLine = "\r\n"
+            };
+
+            writer.WriteLine("<!DOCTYPE NETSCAPE-Bookmark-file-1>");
+            writer.WriteLine("<META HTTP-EQUIV=\"Content-Type\" CONTENT=\"text/html; charset=UTF-8\">");
+            writer.WriteLine("<TITLE>Bookmarks</TITLE>");
+            writer.WriteLine("<H1>Bookmarks</H1>");
+            writer.WriteLine("<DL><p>");
+
+            //Add each bookmark
+            foreach (BookmarkEntry entry in bookmarks)
+            {
+                writer.Write("<DT><A HREF=\"");
+                writer.Write(entry.Url);
+
+                writer.Write("\" ADD_DATE=\"");
+                writer.Write(new DateTimeOffset(entry.Created).ToUnixTimeSeconds());
+
+                writer.Write("\" LAST_VISIT=\"");
+                writer.Write(new DateTimeOffset(entry.LastModified).ToUnixTimeSeconds());
+
+                //tags
+                writer.Write("\" TAGS=\"");
+                writer.Write(entry.Tags);
+
+                writer.Write("\">");
+                writer.Write(entry.Name);
+                writer.WriteLine("</A>");
+
+                //description
+                writer.Write("<DD>");
+                writer.WriteLine(entry.Description);
+
+            }
+
+            //Close document
+            writer.WriteLine("</DL></p>");
+            writer.Flush();
+        }
+    }
+}