[gnome-software/gnome-3-20] trivial: Use a cancellable delay in the dummy refresh program

[Richard Hughes <rhughes src gnome org>]

commit 95a1231487da1aa2cc405d30f48098608a579e25
Author: Richard Hughes <richard hughsie com>
Date:   Thu Apr 14 12:04:23 2016 +0100

    trivial: Use a cancellable delay in the dummy refresh program

 src/plugins/gs-plugin-dummy.c |   95 +++++++++++++++++++++++++++++++++++++++++
 1 files changed, 95 insertions(+), 0 deletions(-)
---
diff --git a/src/plugins/gs-plugin-dummy.c b/src/plugins/gs-plugin-dummy.c
index 213c17f..750c527 100644
--- a/src/plugins/gs-plugin-dummy.c
+++ b/src/plugins/gs-plugin-dummy.c
@@ -267,6 +267,101 @@ gs_plugin_add_distro_upgrades (GsPlugin *plugin,
        return TRUE;
 }
 
+typedef struct {
+       GsPlugin        *plugin;
+       GsApp           *app;
+       GMainLoop       *loop;
+       GCancellable    *cancellable;
+       GError          **error;
+       guint            percentage;
+} GsPluginDummyHelper;
+
+/**
+ * gs_plugin_dummy_delay_cb:
+ */
+static gboolean
+gs_plugin_dummy_delay_cb (gpointer user_data)
+{
+       GsPluginDummyHelper *helper = (GsPluginDummyHelper *) user_data;
+       helper->percentage += 10;
+       if (helper->percentage >= 100) {
+               g_main_loop_quit (helper->loop);
+               return FALSE;
+       }
+       if (helper->error != NULL && *(helper->error) != NULL) {
+               g_main_loop_quit (helper->loop);
+               return FALSE;
+       }
+       g_debug ("dummy percentage=%i%%", helper->percentage);
+       gs_app_set_progress (helper->app, helper->percentage);
+       gs_plugin_status_update (helper->plugin,
+                                helper->app,
+                                GS_PLUGIN_STATUS_DOWNLOADING);
+       return TRUE;
+}
+
+/**
+ * gs_plugin_dummy_delay_cancel_cb:
+ */
+static void
+gs_plugin_dummy_delay_cancel_cb (GCancellable *cancellable,
+                                GsPluginDummyHelper *helper)
+{
+       g_debug ("dummy delay cancelled");
+       g_cancellable_set_error_if_cancelled (cancellable, helper->error);
+}
+
+/**
+ * gs_plugin_dummy_delay:
+ */
+static gboolean
+gs_plugin_dummy_delay (GsPlugin *plugin,
+                      GsApp *app,
+                      guint timeout_ms,
+                      GCancellable *cancellable,
+                      GError **error)
+{
+       g_autofree GsPluginDummyHelper *helper = g_new0 (GsPluginDummyHelper, 1);
+       g_autoptr(GMainLoop) loop = g_main_loop_new (NULL, FALSE);
+
+       /* cancel the delay on cancellation */
+       if (cancellable != NULL) {
+               g_cancellable_connect (cancellable,
+                                      G_CALLBACK (gs_plugin_dummy_delay_cancel_cb),
+                                      helper, NULL);
+       }
+
+       /* set up callbacks */
+       helper->app = app;
+       helper->cancellable = cancellable;
+       helper->error = error;
+       helper->loop = loop;
+       helper->percentage = 0;
+       helper->plugin = plugin;
+       g_debug ("dummy waiting for %ims", timeout_ms);
+       g_timeout_add (timeout_ms / 10, gs_plugin_dummy_delay_cb, helper);
+       g_main_loop_run (loop);
+       g_debug ("dummy done");
+       return helper->error != NULL;
+}
+
+/**
+ * gs_plugin_refresh:
+ */
+gboolean
+gs_plugin_refresh (GsPlugin *plugin,
+                  guint cache_age,
+                  GsPluginRefreshFlags flags,
+                  GCancellable *cancellable,
+                  GError **error)
+{
+       guint delay_ms = 100;
+       g_autoptr(GsApp) app = gs_app_new (NULL);
+
+       /* do delay */
+       return gs_plugin_dummy_delay (plugin, app, delay_ms, cancellable, error);
+}
+
 /**
  * gs_plugin_review_submit:
  */