[gnome-boxes] media-manager: Sort media by vendor & release date

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit 6b5c6667f9182fc4f382b13bc8f0e870ed632e72
Author: Visarion Alexandru <viorel visarion gmail com>
Date:   Tue Apr 19 23:44:48 2016 +0300

    media-manager: Sort media by vendor & release date
    
    Sort the media by vendor and, within each vendor, by the release date.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=691790

 src/media-manager.vala |   21 ++++++++++++++++++++-
 1 files changed, 20 insertions(+), 1 deletions(-)
---
diff --git a/src/media-manager.vala b/src/media-manager.vala
index 52c94a7..59842c7 100644
--- a/src/media-manager.vala
+++ b/src/media-manager.vala
@@ -145,7 +145,7 @@ private class Boxes.MediaManager : Object {
                             continue;
                     }
 
-                    list.insert_sorted (media, compare_media_by_label);
+                    list.insert_sorted (media, compare_media_by_vendor);
                 } catch (GLib.Error error) {
                     warning ("Failed to use ISO '%s': %s", path, error.message);
                 }
@@ -217,6 +217,25 @@ private class Boxes.MediaManager : Object {
         }
     }
 
+    private static int compare_media_by_vendor (InstallerMedia media_a, InstallerMedia media_b) {
+        if (media_a.os == null) {
+            if (media_b.os == null)
+                return 0;
+            else
+                return 1;
+        } else if (media_b.os == null)
+            return -1;
+        else {
+            var vendor_comparison = strcmp (media_a.os.get_vendor (), media_b.os.get_vendor ());
+
+            if (vendor_comparison == 0)
+                // Within each vendor, list latest release date first
+                return compare_media_by_release_date (media_a, media_b);
+            else
+                return vendor_comparison;
+        }
+    }
+
     private async InstallerMedia create_installer_media_from_iso_info (string   path,
                                                                        string?  label,
                                                                        string?  os_id,