Device menu torn apart and put back together, apt communication up and going

1 files changed, 224 insertions, 0 deletions

diff --git a/src/apt-transaction.c b/src/apt-transaction.c
new file mode 100644
index 0000000..51a5ce9
--- /dev/null
+++ b/src/apt-transaction.c
@@ -0,0 +1,224 @@
+/*
+Copyright 2011 Canonical Ltd.
+
+Authors:
+    Conor Curran <conor.curran@canonical.com>
+
+This program is free software: you can redistribute it and/or modify it 
+under the terms of the GNU General Public License version 3, as published 
+by the Free Software Foundation.
+
+This program is distributed in the hope that it will be useful, but 
+WITHOUT ANY WARRANTY; without even the implied warranties of 
+MERCHANTABILITY, SATISFACTORY QUALITY, 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/>.
+*/
+
+#include <gio/gio.h>
+
+#include "apt-transaction.h"
+#include "dbus-shared-names.h"
+
+static void apt_transaction_investigate (AptTransaction* self);
+static void apt_transaction_simulate_transaction_cb (GObject * obj,
+                                                     GAsyncResult * res,
+                                                     gpointer user_data);
+static void apt_transaction_receive_signal (GDBusProxy * proxy,
+                                            gchar * sender_name,
+                                            gchar * signal_name,
+                                            GVariant * parameters,
+                                            gpointer user_data);
+static void apt_transaction_finish_proxy_setup (GObject *source_object,
+                                                GAsyncResult *res,
+                                                gpointer user_data);
+
+struct _AptTransaction
+{
+	GObject       parent_instance;
+	GDBusProxy *  proxy;    
+	GCancellable * proxy_cancel;  
+  gchar*        id;
+  AptState      current_state;
+};
+
+enum {
+  UPDATE,
+  LAST_SIGNAL
+};
+
+static guint signals[LAST_SIGNAL] = { 0 };
+
+G_DEFINE_TYPE (AptTransaction, apt_transaction, G_TYPE_OBJECT);
+
+static void
+apt_transaction_init (AptTransaction *self)
+{
+  self->proxy = NULL;
+  self->id = NULL;
+  self->proxy_cancel = g_cancellable_new();
+}
+
+static void
+apt_transaction_finalize (GObject *object)
+{
+	/* TODO: Add deinitalization code here */
+  AptTransaction* self = APT_TRANSACTION(object);
+  if (self->proxy != NULL){
+    g_object_unref (self->proxy);
+    self->proxy = NULL;
+  }    
+  g_free (self->id);
+	G_OBJECT_CLASS (apt_transaction_parent_class)->finalize (object);
+}
+
+static void
+apt_transaction_class_init (AptTransactionClass *klass)
+{
+	GObjectClass* object_class = G_OBJECT_CLASS (klass);
+	object_class->finalize = apt_transaction_finalize;
+
+  signals[UPDATE] =  g_signal_new("state-update",
+                                   G_TYPE_FROM_CLASS (klass),
+                                   G_SIGNAL_RUN_LAST,
+                                   0,
+                                   NULL, NULL,
+                                   g_cclosure_marshal_VOID__INT,
+                                   G_TYPE_NONE, 1, G_TYPE_INT);  
+}
+// TODO: you don't need this additional helper
+// Just GObject properties properly
+static void
+apt_transaction_investigate (AptTransaction* self)
+{
+  g_dbus_proxy_new_for_bus (G_BUS_TYPE_SYSTEM,
+                            G_DBUS_PROXY_FLAGS_NONE,
+                            NULL,
+                            "org.debian.apt",
+                            self->id,
+                            "org.debian.apt.transaction",
+                            self->proxy_cancel,
+                            apt_transaction_finish_proxy_setup,
+                            self);
+}
+
+static void
+apt_transaction_finish_proxy_setup (GObject *source_object,
+                                    GAsyncResult *res,
+                                    gpointer user_data)
+{
+  g_return_if_fail (APT_IS_TRANSACTION (user_data));
+  AptTransaction* self = APT_TRANSACTION(user_data);      
+	GError * error = NULL;
+
+	GDBusProxy * proxy = g_dbus_proxy_new_for_bus_finish(res, &error);
+
+	if (self->proxy_cancel != NULL) {
+		g_object_unref(self->proxy_cancel);
+		self->proxy_cancel = NULL;
+	}
+
+	if (error != NULL) {
+		g_warning("Could not grab DBus proxy for %s: %s",
+               "org.debian.apt", error->message);
+		g_error_free(error);
+		return;
+	}
+  
+  self->proxy = proxy;
+
+  g_signal_connect (G_OBJECT(self->proxy),
+                    "g-signal",
+                    G_CALLBACK (apt_transaction_receive_signal),
+                    self);    
+
+  g_dbus_proxy_call (self->proxy,
+                     "Simulate",
+                     NULL,
+                     G_DBUS_CALL_FLAGS_NONE,
+                     -1,
+                     NULL,
+                     apt_transaction_simulate_transaction_cb,
+                     self);                                                                                        
+  
+}                                    
+
+static void
+apt_transaction_receive_signal (GDBusProxy * proxy,
+                                gchar * sender_name,
+                                gchar * signal_name,
+                                GVariant * parameters,
+                                gpointer user_data)
+{
+  g_return_if_fail (APT_IS_TRANSACTION (user_data));
+  AptTransaction* self = APT_TRANSACTION(user_data);      
+
+  if (g_strcmp0(signal_name, "PropertyChanged") == 0) 
+  {
+    gchar* prop_name= NULL;
+    GVariant* value = NULL;
+    g_variant_get (parameters, "(sv)", &prop_name, &value);
+    
+    if (g_strcmp0 (prop_name, "Dependencies") == 0){
+      
+      
+      gchar** install = NULL;
+      gchar** reinstall = NULL;
+      gchar** remove = NULL;
+      gchar** purge = NULL;
+      gchar** upgrade = NULL;
+      gchar** downgrade = NULL;
+      gchar** keep = NULL;
+      g_variant_get (value, "(asasasasasasas)", &install, 
+                     &reinstall, &remove, &purge, &upgrade, &downgrade,
+                     &keep);
+      
+      //g_debug ("Seemed to uppack dependencies without any warnings");
+      //g_debug ("Upgrade quantity : %u", g_strv_length(upgrade));
+      gboolean upgrade_needed = (g_strv_length(upgrade) > 0) ||
+                                (g_strv_length(install) > 0) ||
+                                (g_strv_length(reinstall) > 0) ||
+                                (g_strv_length(remove) > 0) ||
+                                (g_strv_length(purge) > 0);
+      if (upgrade_needed == TRUE){
+        g_signal_emit (self,
+                       signals[UPDATE],
+                       0,
+                       UPDATES_AVAILABLE);
+        
+      }
+      else{
+        g_signal_emit (self,
+                       signals[UPDATE],
+                       0,
+                       UP_TO_DATE);
+      }
+    }
+  }
+  g_variant_unref (parameters);
+}
+
+static void
+apt_transaction_simulate_transaction_cb (GObject * obj,
+                                         GAsyncResult * res,
+                                         gpointer user_data)
+{
+	GError * error = NULL;
+
+	if (error != NULL) {
+    g_warning ("unable to complete the simulate call");
+    g_error_free (error);
+		return;
+	}
+}
+
+AptTransaction* apt_transaction_new (gchar* transaction_id)
+{
+  AptTransaction* tr = g_object_new (APT_TYPE_TRANSACTION, NULL);
+  tr->id = transaction_id;
+  g_debug ("Apt transaction new id = %s", tr->id);
+  apt_transaction_investigate (tr);
+  return tr;
+}