feat: added sessions open/close

flake.nix

@@ -30,7 +30,7 @@
 
               src = lib.cleanSource self;
 
-              buildInputs = with s; [ pam accountsservice polkit ];
+              buildInputs = with s; [ pam accountsservice polkit seatd ];
 
               pubspecLock = lib.importJSON ./pubspec.lock.json;
 

lib/views/desktop.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:flutter_adaptive_scaffold/flutter_adaptive_scaffold.dart';
 
 import '../logic/wallpaper.dart';
@@ -22,6 +23,30 @@ class DesktopView extends StatefulWidget {
 }
 
 class _DesktopViewState extends State<DesktopView> {
+  static const sessionChannel = MethodChannel('com.expidusos.genesis.shell/session');
+
+  String? sessionName = null;
+
+  @override
+  void initState() {
+    super.initState();
+
+    sessionChannel.invokeMethod('open').then((name) => setState(() {
+      sessionName = name;
+    })).catchError((err) {
+      print(err);
+    });
+  }
+
+  @override
+  void dispose() {
+    super.dispose();
+
+    sessionChannel.invokeMethod('close', sessionName).catchError((err) {
+      print(err);
+    });
+  }
+
   @override
   Widget build(BuildContext context) =>
     SystemLayout(

linux/CMakeLists.txt

@@ -54,6 +54,7 @@ add_subdirectory(${FLUTTER_MANAGED_DIR})
 find_package(PkgConfig REQUIRED)
 pkg_check_modules(ACCOUNTSSERVICE REQUIRED IMPORTED_TARGET accountsservice)
 pkg_check_modules(GTK REQUIRED IMPORTED_TARGET gtk+-3.0)
+pkg_check_modules(LIBSEAT REQUIRED IMPORTED_TARGET libseat)
 pkg_check_modules(PAM REQUIRED IMPORTED_TARGET pam)
 
 add_definitions(-DAPPLICATION_ID="${APPLICATION_ID}")
@@ -68,6 +69,7 @@ add_executable(${BINARY_NAME}
   "channels/account.cc"
   "channels/auth.cc"
   "channels/outputs.cc"
+  "channels/session.cc"
   "${FLUTTER_MANAGED_DIR}/generated_plugin_registrant.cc"
 )
 
@@ -77,7 +79,12 @@ apply_standard_settings(${BINARY_NAME})
 
 # Add dependency libraries. Add any application-specific dependencies here.
 target_link_libraries(${BINARY_NAME} PRIVATE flutter)
-target_link_libraries(${BINARY_NAME} PRIVATE PkgConfig::ACCOUNTSSERVICE PkgConfig::GTK PkgConfig::PAM)
+target_link_libraries(${BINARY_NAME} PRIVATE
+  PkgConfig::ACCOUNTSSERVICE
+  PkgConfig::GTK
+  PkgConfig::LIBSEAT
+  PkgConfig::PAM
+)
 
 # Run the Flutter tool portions of the build. This must not be removed.
 add_dependencies(${BINARY_NAME} flutter_assemble)

linux/application-priv.h

@@ -1,10 +1,13 @@
 #pragma once
 
+#include "channels/session.h"
+
 struct _GenesisShellApplication {
   GtkApplication parent_instance;
   char** dart_entrypoint_arguments;
   FlMethodChannel* outputs;
   FlMethodChannel* account;
   FlMethodChannel* auth;
+  SessionChannel session;
   GtkWindow* win;
 };

linux/application.cc

@@ -52,6 +52,7 @@ static void genesis_shell_application_activate(GApplication* application) {
     fl_method_channel_set_method_call_handler(self->auth, auth_method_call_handler, self, nullptr);
   }
 
+  session_channel_init(&self->session, view);
   gtk_widget_grab_focus(GTK_WIDGET(view));
 }
 
@@ -98,6 +99,8 @@ static void genesis_shell_application_dispose(GObject* object) {
   g_clear_pointer(&self->dart_entrypoint_arguments, g_strfreev);
   g_clear_object(&self->outputs);
   g_clear_object(&self->auth);
+  g_clear_object(&self->account);
+  session_channel_deinit(&self->session);
   G_OBJECT_CLASS(genesis_shell_application_parent_class)->dispose(object);
 }
 

linux/channels/session.cc

@@ -0,0 +1,67 @@
+#include <flutter_linux/flutter_linux.h>
+
+extern "C" {
+#include <libseat.h>
+}
+
+#include "session.h"
+#include "../application-priv.h"
+
+static void handle_enable(struct libseat* backend, void* data) {
+	(void)backend;
+  (void)data;
+}
+
+static void handle_disable(struct libseat* backend, void* data) {
+	(void)data;
+	libseat_disable_seat(backend);
+}
+
+struct libseat_seat_listener listener = {
+  .enable_seat = handle_enable,
+	.disable_seat = handle_disable,
+};
+
+static void method_call_handler(FlMethodChannel* channel, FlMethodCall* method_call, gpointer user_data) {
+  SessionChannel* self = (SessionChannel*)user_data;
+  g_autoptr(FlMethodResponse) response = nullptr;
+
+  if (strcmp(fl_method_call_get_name(method_call), "open") == 0) {
+    struct libseat* seat = libseat_open_seat(&listener, user_data);
+    const char* name = libseat_seat_name(seat);
+    g_hash_table_insert(self->seats, (gpointer)name, (gpointer)seat);
+    response = FL_METHOD_RESPONSE(fl_method_success_response_new(fl_value_new_string(name)));
+  } else if (strcmp(fl_method_call_get_name(method_call), "close") == 0) {
+    FlValue* args = fl_method_call_get_args(method_call);
+    const gchar* name = fl_value_get_string(args);
+
+    if (g_hash_table_contains(self->seats, name)) {
+      struct libseat* seat = (struct libseat*)g_hash_table_lookup(self->seats, name);
+      g_hash_table_remove(self->seats, name);
+      libseat_close_seat(seat);
+      response = FL_METHOD_RESPONSE(fl_method_success_response_new(fl_value_new_bool(true)));
+    } else {
+      response = FL_METHOD_RESPONSE(fl_method_success_response_new(fl_value_new_bool(false)));
+    }
+  } else {
+    response = FL_METHOD_RESPONSE(fl_method_not_implemented_response_new());
+  }
+
+  g_autoptr(GError) error = nullptr;
+  if (!fl_method_call_respond(method_call, response, &error)) {
+    g_warning("Failed to send response: %s", error->message);
+  }
+}
+
+void session_channel_init(SessionChannel* self, FlView* view) {
+  self->seats = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, (GDestroyNotify)libseat_close_seat);
+
+  g_autoptr(FlStandardMethodCodec) codec = fl_standard_method_codec_new();
+  self->channel = fl_method_channel_new(fl_engine_get_binary_messenger(fl_view_get_engine(view)), "com.expidusos.genesis.shell/session", FL_METHOD_CODEC(codec));
+  fl_method_channel_set_method_call_handler(self->channel, method_call_handler, self, nullptr);
+}
+
+void session_channel_deinit(SessionChannel* self) {
+  g_clear_object(&self->channel);
+  g_hash_table_unref(self->seats);
+}

linux/channels/session.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#include <flutter_linux/flutter_linux.h>
+
+#include "../application.h"
+
+typedef struct _SessionChannel {
+  GHashTable* seats;
+  FlMethodChannel* channel;
+} SessionChannel;
+
+void session_channel_init(SessionChannel* self, FlView* view);
+void session_channel_deinit(SessionChannel* self);