[gdm] session: add new Initialize method

[Ray Strode <halfline src gnome org>]

commit 5683e5d5a6bc37c7a1b52a633cc79c70b60defb3
Author: Ray Strode <rstrode redhat com>
Date:   Fri Jul 28 16:04:11 2017 -0400

    session: add new Initialize method
    
    Right now the worker interface has three methods for starting
    a conversation: Setup, SetupForUser, SetupForProgram
    
    Each of these method calls take a large number of overlapping arguments.
    Extending these argument lists is painful and breaks upgrades.
    
    This commit adds a new, fourth call, Initialize, which supercedes the
    others and just takes a vardict, which is much more extensible.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=788851

 daemon/gdm-session-worker.c   |   53 ++++++++++
 daemon/gdm-session-worker.xml |    3 +
 daemon/gdm-session.c          |  213 ++++++++--------------------------------
 3 files changed, 99 insertions(+), 170 deletions(-)
---
diff --git a/daemon/gdm-session-worker.c b/daemon/gdm-session-worker.c
index 890fd91..66d9e6d 100644
--- a/daemon/gdm-session-worker.c
+++ b/daemon/gdm-session-worker.c
@@ -2818,6 +2818,57 @@ gdm_session_worker_handle_open (GdmDBusWorker         *object,
 }
 
 static gboolean
+gdm_session_worker_handle_initialize (GdmDBusWorker         *object,
+                                      GDBusMethodInvocation *invocation,
+                                      GVariant              *details)
+{
+        GdmSessionWorker *worker = GDM_SESSION_WORKER (object);
+        GVariantIter      iter;
+        char             *key;
+        GVariant         *value;
+
+        validate_and_queue_state_change (worker, invocation, GDM_SESSION_WORKER_STATE_SETUP_COMPLETE);
+
+        g_variant_iter_init (&iter, details);
+        while (g_variant_iter_loop (&iter, "{sv}", &key, &value)) {
+                if (g_strcmp0 (key, "service") == 0) {
+                        worker->priv->service = g_strdup (g_variant_get_string (value, NULL));
+                } else if (g_strcmp0 (key, "username") == 0) {
+                        worker->priv->username = g_strdup (g_variant_get_string (value, NULL));
+                } else if (g_strcmp0 (key, "is-program-session") == 0) {
+                        worker->priv->is_program_session = g_variant_get_boolean (value);
+                } else if (g_strcmp0 (key, "log-file") == 0) {
+                        worker->priv->log_file = g_strdup (g_variant_get_string (value, NULL));
+                } else if (g_strcmp0 (key, "x11-display-name") == 0) {
+                        worker->priv->x11_display_name = g_strdup (g_variant_get_string (value, NULL));
+                } else if (g_strcmp0 (key, "x11-authority-file") == 0) {
+                        worker->priv->x11_authority_file = g_strdup (g_variant_get_string (value, NULL));
+                } else if (g_strcmp0 (key, "console") == 0) {
+                        worker->priv->display_device = g_strdup (g_variant_get_string (value, NULL));
+                } else if (g_strcmp0 (key, "seat-id") == 0) {
+                        worker->priv->display_seat_id = g_strdup (g_variant_get_string (value, NULL));
+                } else if (g_strcmp0 (key, "hostname") == 0) {
+                        worker->priv->hostname = g_strdup (g_variant_get_string (value, NULL));
+                } else if (g_strcmp0 (key, "display-is-local") == 0) {
+                        worker->priv->display_is_local = g_variant_get_boolean (value);
+                } else if (g_strcmp0 (key, "display-is-initial") == 0) {
+                        worker->priv->display_is_initial = g_variant_get_boolean (value);
+                }
+        }
+
+        g_signal_connect_swapped (worker->priv->user_settings,
+                                  "notify::language-name",
+                                  G_CALLBACK (on_saved_language_name_read),
+                                  worker);
+
+        g_signal_connect_swapped (worker->priv->user_settings,
+                                  "notify::session-name",
+                                  G_CALLBACK (on_saved_session_name_read),
+                                  worker);
+        return TRUE;
+}
+
+static gboolean
 gdm_session_worker_handle_setup (GdmDBusWorker         *object,
                                  GDBusMethodInvocation *invocation,
                                  const char            *service,
@@ -3189,6 +3240,8 @@ gdm_session_worker_constructor (GType                  type,
 static void
 worker_interface_init (GdmDBusWorkerIface *interface)
 {
+        interface->handle_initialize = gdm_session_worker_handle_initialize;
+        /* The next three are for backward compat only */
         interface->handle_setup = gdm_session_worker_handle_setup;
         interface->handle_setup_for_user = gdm_session_worker_handle_setup_for_user;
         interface->handle_setup_for_program = gdm_session_worker_handle_setup_for_program;
diff --git a/daemon/gdm-session-worker.xml b/daemon/gdm-session-worker.xml
index 9f6d8b3..4280fe0 100644
--- a/daemon/gdm-session-worker.xml
+++ b/daemon/gdm-session-worker.xml
@@ -24,6 +24,9 @@
       <arg name="command" direction="in" type="s"/>
       <arg name="child_pid" direction="out" type="i"/>
     </method>
+    <method name="Initialize">
+      <arg name="details" direction="in" type="a{sv}"/>
+    </method>
     <method name="Setup">
       <arg name="service_name" direction="in" type="s"/>
       <arg name="x11_display_name" direction="in" type="s"/>
diff --git a/daemon/gdm-session.c b/daemon/gdm-session.c
index af9f6fb..812c7be 100644
--- a/daemon/gdm-session.c
+++ b/daemon/gdm-session.c
@@ -2050,9 +2050,9 @@ gdm_session_stop_conversation (GdmSession *self,
 }
 
 static void
-on_setup_complete_cb (GdmDBusWorker *proxy,
-                      GAsyncResult  *res,
-                      gpointer       user_data)
+on_initialization_complete_cb (GdmDBusWorker *proxy,
+                               GAsyncResult  *res,
+                               gpointer       user_data)
 {
         GdmSessionConversation *conversation = user_data;
         GdmSession *self;
@@ -2094,188 +2094,59 @@ on_setup_complete_cb (GdmDBusWorker *proxy,
 }
 
 static void
-send_setup (GdmSession *self,
-            const char *service_name)
+initialize (GdmSession *self,
+            const char *service_name,
+            const char *username,
+            const char *log_file)
 {
-        const char     *display_name;
-        const char     *display_device;
-        const char     *display_seat_id;
-        const char     *display_hostname;
-        const char     *display_x11_authority_file;
+        GVariantBuilder details;
         GdmSessionConversation *conversation;
 
         g_assert (service_name != NULL);
 
-        if (self->priv->display_name != NULL) {
-                display_name = self->priv->display_name;
-        } else {
-                display_name = "";
-        }
-        if (self->priv->display_hostname != NULL) {
-                display_hostname = self->priv->display_hostname;
-        } else {
-                display_hostname = "";
-        }
-        if (self->priv->display_device != NULL) {
-                display_device = self->priv->display_device;
-        } else {
-                display_device = "";
-        }
-        if (self->priv->display_seat_id != NULL) {
-                display_seat_id = self->priv->display_seat_id;
-        } else {
-                display_seat_id = "";
-        }
-        if (self->priv->display_x11_authority_file != NULL) {
-                display_x11_authority_file = self->priv->display_x11_authority_file;
-        } else {
-                display_x11_authority_file = "";
-        }
+        g_variant_builder_init (&details, G_VARIANT_TYPE ("a{sv}"));
 
-        g_debug ("GdmSession: Beginning setup");
+        g_variant_builder_add_parsed (&details, "{'service', <%s>}", service_name);
+        if (username != NULL)
+                g_variant_builder_add_parsed (&details, "{'username', <%s>}", username);
 
-        conversation = find_conversation_by_name (self, service_name);
-        if (conversation != NULL) {
-                gdm_dbus_worker_call_setup (conversation->worker_proxy,
-                                            service_name,
-                                            display_name,
-                                            display_x11_authority_file,
-                                            display_device,
-                                            display_seat_id,
-                                            display_hostname,
-                                            self->priv->display_is_local,
-                                            self->priv->display_is_initial,
-                                            conversation->worker_cancellable,
-                                            (GAsyncReadyCallback) on_setup_complete_cb,
-                                            conversation);
-        }
-}
+        if (log_file != NULL)
+                g_variant_builder_add_parsed (&details, "{'log-file', <%s>}", log_file);
 
-static void
-send_setup_for_user (GdmSession *self,
-                     const char *service_name)
-{
-        const char     *display_name;
-        const char     *display_device;
-        const char     *display_seat_id;
-        const char     *display_hostname;
-        const char     *display_x11_authority_file;
-        const char     *selected_user;
-        GdmSessionConversation *conversation;
+        if (self->priv->is_program_session)
+                g_variant_builder_add_parsed (&details, "{'is-program-session', <%b>}", 
self->priv->is_program_session);
 
-        g_assert (service_name != NULL);
-
-        conversation = find_conversation_by_name (self, service_name);
+        if (self->priv->display_name != NULL)
+                g_variant_builder_add_parsed (&details, "{'x11-display-name', <%s>}", 
self->priv->display_name);
 
-        if (self->priv->display_name != NULL) {
-                display_name = self->priv->display_name;
-        } else {
-                display_name = "";
-        }
-        if (self->priv->display_hostname != NULL) {
-                display_hostname = self->priv->display_hostname;
-        } else {
-                display_hostname = "";
-        }
-        if (self->priv->display_device != NULL) {
-                display_device = self->priv->display_device;
-        } else {
-                display_device = "";
-        }
-        if (self->priv->display_seat_id != NULL) {
-                display_seat_id = self->priv->display_seat_id;
-        } else {
-                display_seat_id = "";
-        }
-        if (self->priv->display_x11_authority_file != NULL) {
-                display_x11_authority_file = self->priv->display_x11_authority_file;
-        } else {
-                display_x11_authority_file = "";
-        }
-        if (self->priv->selected_user != NULL) {
-                selected_user = self->priv->selected_user;
-        } else {
-                selected_user = "";
-        }
+        if (self->priv->display_hostname != NULL)
+                g_variant_builder_add_parsed (&details, "{'hostname', <%s>}", self->priv->display_hostname);
 
-        g_debug ("GdmSession: Beginning setup for user %s", self->priv->selected_user);
+        if (self->priv->display_is_local)
+                g_variant_builder_add_parsed (&details, "{'display-is-local', <%b>}", 
self->priv->display_is_local);
 
-        if (conversation != NULL) {
-                gdm_dbus_worker_call_setup_for_user (conversation->worker_proxy,
-                                                     service_name,
-                                                     selected_user,
-                                                     display_name,
-                                                     display_x11_authority_file,
-                                                     display_device,
-                                                     display_seat_id,
-                                                     display_hostname,
-                                                     self->priv->display_is_local,
-                                                     self->priv->display_is_initial,
-                                                     conversation->worker_cancellable,
-                                                     (GAsyncReadyCallback) on_setup_complete_cb,
-                                                     conversation);
-        }
-}
+        if (self->priv->display_is_initial)
+                g_variant_builder_add_parsed (&details, "{'display-is-initial', <%b>}", 
self->priv->display_is_initial);
 
-static void
-send_setup_for_program (GdmSession *self,
-                        const char *service_name,
-                        const char *username,
-                        const char *log_file)
-{
-        const char     *display_name;
-        const char     *display_device;
-        const char     *display_seat_id;
-        const char     *display_hostname;
-        const char     *display_x11_authority_file;
-        GdmSessionConversation *conversation;
+        if (self->priv->display_device != NULL)
+                g_variant_builder_add_parsed (&details, "{'console', <%s>}", self->priv->display_device);
 
-        g_assert (service_name != NULL);
+        if (self->priv->display_seat_id != NULL)
+                g_variant_builder_add_parsed (&details, "{'seat-id', <%s>}", self->priv->display_seat_id);
 
-        if (self->priv->display_name != NULL) {
-                display_name = self->priv->display_name;
-        } else {
-                display_name = "";
-        }
-        if (self->priv->display_hostname != NULL) {
-                display_hostname = self->priv->display_hostname;
-        } else {
-                display_hostname = "";
-        }
-        if (self->priv->display_device != NULL) {
-                display_device = self->priv->display_device;
-        } else {
-                display_device = "";
-        }
-        if (self->priv->display_seat_id != NULL) {
-                display_seat_id = self->priv->display_seat_id;
-        } else {
-                display_seat_id = "";
-        }
-        if (self->priv->display_x11_authority_file != NULL) {
-                display_x11_authority_file = self->priv->display_x11_authority_file;
-        } else {
-                display_x11_authority_file = "";
-        }
+        if (self->priv->display_x11_authority_file != NULL)
+                g_variant_builder_add_parsed (&details, "{'x11-authority-file', <%s>}", 
self->priv->display_x11_authority_file);
 
-        g_debug ("GdmSession: Beginning setup for session for program using PAM service %s", service_name);
+        g_debug ("GdmSession: Beginning initialization");
 
         conversation = find_conversation_by_name (self, service_name);
         if (conversation != NULL) {
-                gdm_dbus_worker_call_setup_for_program (conversation->worker_proxy,
-                                                        service_name,
-                                                        username,
-                                                        display_name,
-                                                        display_x11_authority_file,
-                                                        display_device,
-                                                        display_seat_id,
-                                                        display_hostname,
-                                                        self->priv->display_is_local,
-                                                        self->priv->display_is_initial,
-                                                        log_file,
-                                                        conversation->worker_cancellable,
-                                                        (GAsyncReadyCallback) on_setup_complete_cb,
-                                                        conversation);
+                gdm_dbus_worker_call_initialize (conversation->worker_proxy,
+                                                 g_variant_builder_end (&details),
+
+                                                 conversation->worker_cancellable,
+                                                 (GAsyncReadyCallback) on_initialization_complete_cb,
+                                                 conversation);
         }
 }
 
@@ -2288,7 +2159,8 @@ gdm_session_setup (GdmSession *self,
 
         update_session_type (self);
 
-        send_setup (self, service_name);
+        initialize (self, service_name, NULL, NULL);
+        gdm_session_defaults_changed (self);
 }
 
 
@@ -2306,7 +2178,8 @@ gdm_session_setup_for_user (GdmSession *self,
         gdm_session_select_user (self, username);
 
         self->priv->is_program_session = FALSE;
-        send_setup_for_user (self, service_name);
+        initialize (self, service_name, self->priv->selected_user, NULL);
+        gdm_session_defaults_changed (self);
 }
 
 void
@@ -2319,7 +2192,7 @@ gdm_session_setup_for_program (GdmSession *self,
         g_return_if_fail (GDM_IS_SESSION (self));
 
         self->priv->is_program_session = TRUE;
-        send_setup_for_program (self, service_name, username, log_file);
+        initialize (self, service_name, username, log_file);
 }
 
 void