1 files changed, 71 insertions, 0 deletions
diff --git a/src/Portal.vala b/src/Portal.vala
new file mode 100644
index 0000000..c2e8e1e
--- /dev/null
+++ b/src/Portal.vala
@@ -0,0 +1,71 @@
+[DBus (name="org.freedesktop.portal.Email")]
+private interface PortalEmail : DBusProxy {
+    [DBus (name = "version")]
+    public abstract uint version { get; }
+}
+
+public class Portal : GLib.Object {
+    private static Portal portal;
+    public static Portal get_instance () {
+        if (portal == null){
+            portal = new Portal ();
+        }
+        return portal;
+    }
+
+    private const string BUS_NAME = "org.freedesktop.portal.Desktop";
+    private const string OBJECT_PATH = "/org/freedesktop/portal/desktop";
+
+    private GLib.DBusConnection bus;
+
+    public async Variant compose_email (HashTable<string, Variant> options,
+      UnixFDList attachments) throws Error{
+        if (bus == null){
+            bus = yield Bus.get(BusType.SESSION);
+        }
+
+        options.insert ("handle_token", Portal.generate_handle());
+
+        var options_builder = new VariantBuilder (VariantType.VARDICT);
+        options.foreach ((key, val) => {
+            options_builder.add ("{sv}", key, val);
+        });
+
+        PortalEmail? email = yield bus.get_proxy(BUS_NAME, OBJECT_PATH);
+
+        var response = email.call_with_unix_fd_list_sync (
+            "ComposeEmail",
+            new Variant ("(sa{sv})", yield Portal.get_parent_window(), options_builder),
+            DBusCallFlags.NONE,
+            -1,
+            attachments
+        );
+        return response;
+    }
+
+    private static string generate_handle () {
+        return "%s_%i".printf (
+            GLib.Application.get_default ().application_id.replace (".", "_").replace("-", "_"),
+            Random.int_range (0, int32.MAX)
+        );
+    }
+
+    private static async string get_parent_window () {
+        var window = AppWindow.get_instance().get_window ();
+
+        if (window is Gdk.Wayland.Window) {
+            var handle = "wayland:";
+            ((Gdk.Wayland.Window) window).export_handle ((w, h) => {
+                handle += h;
+                get_parent_window.callback ();
+            });
+            yield;
+            return handle;
+        } else if (window is Gdk.X11.Window) {
+            return "x11:%x".printf ((uint) ((Gdk.X11.Window) window).get_xid ());
+        } else {
+            warning ("Could not get parent window");
+            return "";
+        }
+    }
+}