[gnome-software/wip/rancell/ubuntu-ratings] Show a notification when distro upgrades are available

[Robert Ancell <rancell src gnome org>]

commit 2f15861797300db68de86d656a96d1b72eef7bfe
Author: Richard Hughes <richard hughsie com>
Date:   Thu Oct 29 11:28:51 2015 +0000

    Show a notification when distro upgrades are available

 src/gs-update-monitor.c |   71 +++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 71 insertions(+), 0 deletions(-)
---
diff --git a/src/gs-update-monitor.c b/src/gs-update-monitor.c
index 765a61f..6ddfd34 100644
--- a/src/gs-update-monitor.c
+++ b/src/gs-update-monitor.c
@@ -43,6 +43,7 @@ struct _GsUpdateMonitor {
        guint            cleanup_notifications_id;      /* at startup */
        guint            check_startup_id;              /* 60s after startup */
        guint            check_hourly_id;               /* and then every hour */
+       guint            check_daily_id;                /* every 3rd day */
        PkControl       *control;                       /* network type detection */
        guint            notification_blocked_id;       /* rate limit notifications */
 };
@@ -196,6 +197,44 @@ get_updates_finished_cb (GObject *object,
 }
 
 static void
+get_upgrades_finished_cb (GObject *object,
+                         GAsyncResult *res,
+                         gpointer data)
+{
+       GsUpdateMonitor *monitor = GS_UPDATE_MONITOR (data);
+       GsApp *app;
+       g_autofree gchar *body = NULL;
+       g_autoptr(GError) error = NULL;
+       g_autoptr(GNotification) n = NULL;
+       g_autoptr(GsAppList) apps = NULL;
+
+       /* get result */
+       apps = gs_plugin_loader_get_updates_finish (GS_PLUGIN_LOADER (object), res, &error);
+       if (apps == NULL) {
+               g_debug ("no upgrades; withdrawing upgrades-available notification");
+               g_application_withdraw_notification (monitor->application,
+                                                    "upgrades-available");
+               if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
+                       g_warning ("failed to get upgrades: %s", error->message);
+               return;
+       }
+
+       /* just get the first result : FIXME, do we sort these by date? */
+       app = GS_APP (apps->data);
+
+       /* TRANSLATORS: this is a distro upgrade, the replacement would be the
+        * distro name, e.g. 'Fedora' */
+       body = g_strdup_printf (_("A new version of %s is available to install"),
+                               gs_app_get_name (app));
+
+       /* TRANSLATORS: this is a distro upgrade */
+       n = g_notification_new (_("Software Upgrade Available"));
+       g_notification_set_body (n, body);
+       g_notification_set_default_action_and_target (n, "app.set-mode", "s", "updates");
+       g_application_send_notification (monitor->application, "upgrades-available", n);
+}
+
+static void
 get_updates (GsUpdateMonitor *monitor)
 {
        /* NOTE: this doesn't actually do any network access, instead it just
@@ -210,6 +249,20 @@ get_updates (GsUpdateMonitor *monitor)
 }
 
 static void
+get_upgrades (GsUpdateMonitor *monitor)
+{
+       /* NOTE: this doesn't actually do any network access, it relies on the
+        * AppStream data being up to date, either by the appstream-data
+        * package being up-to-date, or the metadata being auto-downloaded */
+       g_debug ("Getting updates");
+       gs_plugin_loader_get_distro_upgrades_async (monitor->plugin_loader,
+                                                   GS_PLUGIN_REFINE_FLAGS_DEFAULT,
+                                                   monitor->cancellable,
+                                                   get_upgrades_finished_cb,
+                                                   monitor);
+}
+
+static void
 refresh_cache_finished_cb (GObject *object,
                           GAsyncResult *res,
                           gpointer data)
@@ -293,15 +346,29 @@ check_hourly_cb (gpointer data)
 }
 
 static gboolean
+check_thrice_daily_cb (gpointer data)
+{
+       GsUpdateMonitor *monitor = data;
+
+       g_debug ("Daily upgrades check");
+       get_upgrades (monitor);
+
+       return G_SOURCE_CONTINUE;
+}
+
+static gboolean
 check_updates_on_startup_cb (gpointer data)
 {
        GsUpdateMonitor *monitor = data;
 
        g_debug ("First hourly updates check");
        check_updates (monitor);
+       get_upgrades (monitor);
 
        monitor->check_hourly_id =
                g_timeout_add_seconds (3600, check_hourly_cb, monitor);
+       monitor->check_daily_id =
+               g_timeout_add_seconds (3 * 86400, check_thrice_daily_cb, monitor);
 
        monitor->check_startup_id = 0;
        return G_SOURCE_REMOVE;
@@ -436,6 +503,10 @@ gs_update_monitor_dispose (GObject *object)
                g_source_remove (monitor->check_hourly_id);
                monitor->check_hourly_id = 0;
        }
+       if (monitor->check_daily_id != 0) {
+               g_source_remove (monitor->check_daily_id);
+               monitor->check_daily_id = 0;
+       }
        if (monitor->check_startup_id != 0) {
                g_source_remove (monitor->check_startup_id);
                monitor->check_startup_id = 0;