[gnome-software/wip/temp/ubuntu-xenial-rebased: 158/326] Refresh appstream index if needed

[Iain Lane <iainl src gnome org>]

commit 03f353f9b8543dfcda192443a8d7d0137087f20c
Author: William Hua <william hua canonical com>
Date:   Wed Mar 16 12:25:53 2016 -0400

    Refresh appstream index if needed

 src/plugins/gs-plugin-appstream.c |   71 +++++++++++++++++++++++++++++++++++++
 1 files changed, 71 insertions(+), 0 deletions(-)
---
diff --git a/src/plugins/gs-plugin-appstream.c b/src/plugins/gs-plugin-appstream.c
index 6dd5413..a50f526 100644
--- a/src/plugins/gs-plugin-appstream.c
+++ b/src/plugins/gs-plugin-appstream.c
@@ -26,6 +26,7 @@
 #include <gs-utils.h>
 #include <gs-plugin.h>
 #include <gs-plugin-loader.h>
+#include <gs-application.h>
 
 #include "gs-appstream.h"
 
@@ -147,6 +148,73 @@ gs_plugin_appstream_get_origins_hash (GPtrArray *array)
        return origins;
 }
 
+#define APP_INFO_PATH "/var/lib/app-info"
+#define REFRESH_TIMEOUT 1000
+
+static gboolean
+needs_refresh (GsPlugin *plugin)
+{
+       g_autoptr(GDir) dir = g_dir_open (APP_INFO_PATH, 0, NULL);
+
+       return dir == NULL || g_dir_read_name (dir) == NULL;
+}
+
+static void
+refreshed_cb (GObject      *source_object,
+             GAsyncResult *res,
+             gpointer      user_data)
+{
+       GsPlugin *plugin = user_data;
+       GsPluginLoader *loader = GS_PLUGIN_LOADER (source_object);
+
+       if (gs_plugin_loader_refresh_finish (loader, res, NULL))
+               gs_plugin_updates_changed (plugin);
+}
+
+static void
+start_refresh (GsPlugin *plugin)
+{
+       GApplication *application;
+       GsPluginLoader *loader;
+
+       application = g_application_get_default ();
+
+       loader = gs_application_get_plugin_loader (GS_APPLICATION (application));
+
+       gs_plugin_loader_refresh_async (loader,
+                                       0,
+                                       GS_PLUGIN_REFRESH_FLAGS_UPDATES,
+                                       NULL,
+                                       refreshed_cb,
+                                       plugin);
+}
+
+static gboolean
+ask_refresh (gpointer user_data)
+{
+       GApplication *application;
+       GtkWindow *parent;
+       GtkWidget *dialog;
+
+       application = g_application_get_default ();
+
+       parent = gtk_application_get_active_window (GTK_APPLICATION (application));
+
+       dialog = gtk_message_dialog_new (parent,
+                                        GTK_DIALOG_MODAL |
+                                        GTK_DIALOG_DESTROY_WITH_PARENT,
+                                        GTK_MESSAGE_QUESTION,
+                                        GTK_BUTTONS_YES_NO,
+                                        _("An update is needed to show all installable apps. Download 
now?"));
+
+       if (gtk_dialog_run (GTK_DIALOG (dialog)) == GTK_RESPONSE_YES)
+               start_refresh (user_data);
+
+       gtk_widget_destroy (dialog);
+
+       return G_SOURCE_REMOVE;
+}
+
 /**
  * gs_plugin_setup:
  */
@@ -162,6 +230,9 @@ gs_plugin_setup (GsPlugin *plugin, GCancellable *cancellable, GError **error)
        guint i;
        g_autoptr(GHashTable) origins = NULL;
 
+       if (needs_refresh (plugin))
+               gdk_threads_add_timeout (REFRESH_TIMEOUT, ask_refresh, plugin);
+
        /* Parse the XML */
        if (g_getenv ("GNOME_SOFTWARE_PREFER_LOCAL") != NULL) {
                as_store_set_add_flags (plugin->priv->store,