1 files changed, 49 insertions, 0 deletions
diff --git a/src/io/contacts-io-export-operation.vala b/src/io/contacts-io-export-operation.vala
new file mode 100644
index 0000000..65a9d1e
--- /dev/null
+++ b/src/io/contacts-io-export-operation.vala
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2021 Niels De Graef <nielsdegraef@gmail.com>
+ *
+ * This program 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.
+ *
+ * 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+using Folks;
+
+/**
+ * An Io.ExportOperation is an object that can deal with exporting one or more
+ * contacts ({@link Folks.Individual}s) into a serialized format (VCard is the
+ * most common example, but there exist also CSV based formats and others).
+ *
+ * Note that unlike a Io.Importer, we can skip the whole {@link GLib.HashTable}
+ * dance, since we aren't dealing with untrusted data anymore.
+ */
+public abstract class Contacts.Io.ExportOperation : Contacts.Operation {
+
+  /** The list of individuals that will be exported */
+  public Gee.List<Individual> individuals { get; construct set; }
+
+  /**
+   * The generic output stream to export the individuals to.
+   *
+   * If you want to export to:
+   * - a file, use the result of {@link GLib.File.create}
+   * - a string, create a {@link GLib.MemoryOutputStream} and append a '\0'
+   *   terminator at the end
+   * - ...
+   */
+  public GLib.OutputStream output { get; construct set; }
+
+  public override bool reversable { get { return false; } }
+
+  protected override async void _undo () throws GLib.Error {
+    // No need to do anything, since reversable is false
+  }
+}