[gnome-boxes/update-downloadable-oses: 1/2] wizard-source: Use get_recommended_downloads in the frontpage

[Felipe Borges <felipeborges src gnome org>]

commit a4829f2a0712b19b41a83497d7816d36a16a9435
Author: Felipe Borges <felipeborges gnome org>
Date:   Thu Nov 22 15:53:13 2018 +0100

    wizard-source: Use get_recommended_downloads in the frontpage
    
    We also recommend some downloads in the wizard's frontpage when
    there aren't medias index by tracker to list.

 src/wizard-source.vala | 26 ++++----------------------
 1 file changed, 4 insertions(+), 22 deletions(-)
---
diff --git a/src/wizard-source.vala b/src/wizard-source.vala
index 5b14bfa8..6868122e 100644
--- a/src/wizard-source.vala
+++ b/src/wizard-source.vala
@@ -285,12 +285,6 @@ private void on_notify_estimated_load_progress () {
 
     public string filename { get; set; }
 
-    private string[] recommended_downloads = {
-        "http://ubuntu.com/ubuntu/16.04";,
-        "http://opensuse.org/opensuse/42.3";,
-        "http://fedoraproject.org/fedora/27";,
-    };
-
     public bool download_required {
         get {
             string scheme = Uri.parse_scheme (uri);
@@ -390,25 +384,13 @@ public void setup_ui (AppWindow window) {
 
         downloads_vbox.bind_model (downloads_model, create_downloadable_entry);
 
-        populate_recommended_downloads ();
+        populate_recommended_downloads.begin ();
     }
 
-    private void populate_recommended_downloads () {
+    private async void populate_recommended_downloads () {
         var os_db = media_manager.os_db;
-        foreach (var os_id in recommended_downloads) {
-            os_db.get_os_by_id.begin (os_id, (obj, res) => {
-                try {
-                    var os = os_db.get_os_by_id.end (res);
-
-                    // TODO: Select the desktop/workstation variant.
-                    var media = os.get_media_list ().get_nth (0) as Osinfo.Media;
-
-                    downloads_model.append (media);
-                } catch (OSDatabaseError error) {
-                    warning ("Failed to find OS with ID '%s': %s", os_id, error.message);
-                    return;
-                }
-            });
+        foreach (var media in yield get_recommended_downloads ()) {
+            downloads_model.append (media);
         }
     }