[gnome-games] grilo: Improve errors handling in GriloCover

[Adrien Plazas <aplazas src gnome org>]

commit a38035b774269378c36b937d497328367342352d
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Sat Aug 13 11:47:13 2016 +0200

    grilo: Improve errors handling in GriloCover
    
    This fixes several compile time warnings.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=769844

 src/grilo/grilo-cover.vala |   37 ++++++++++++++++++++++++++++++-------
 1 files changed, 30 insertions(+), 7 deletions(-)
---
diff --git a/src/grilo/grilo-cover.vala b/src/grilo/grilo-cover.vala
index 5459b59..e6b62b5 100644
--- a/src/grilo/grilo-cover.vala
+++ b/src/grilo/grilo-cover.vala
@@ -21,7 +21,15 @@ public class Games.GriloCover : Object, Cover {
                if (icon != null)
                        return icon;
 
-               load_cover ();
+               try {
+                       load_cover ();
+               }
+               catch (Error e) {
+                       warning (e.message);
+
+                       return icon;
+               }
+
                if (icon != null)
                        return icon;
 
@@ -40,10 +48,10 @@ public class Games.GriloCover : Object, Cover {
                return_if_fail (grl_media.length (Grl.MetadataKey.THUMBNAIL) != 0);
 
                var uri = grl_media.get_thumbnail_nth (0);
-               fetch_cover.begin (uri);
+               try_fetch_cover.begin (uri);
        }
 
-       private string get_cover_path () {
+       private string get_cover_path () throws Error {
                if (cover_path != null)
                        return cover_path;
 
@@ -54,7 +62,18 @@ public class Games.GriloCover : Object, Cover {
                return cover_path;
        }
 
-       private async void fetch_cover (string uri) {
+       private async void try_fetch_cover (string uri) {
+               try {
+                       yield fetch_cover (uri);
+               }
+               catch (Error e) {
+                       warning (e.message);
+
+                       return;
+               }
+       }
+
+       private async void fetch_cover (string uri) throws Error{
                var dir = Application.get_covers_dir ();
                Application.try_make_dir (dir);
 
@@ -70,12 +89,16 @@ public class Games.GriloCover : Object, Cover {
                                return;
                        }
 
-                       FileUtils.set_data (cover_path, mess.response_body.data);
-                       load_cover ();
+                       try {
+                               FileUtils.set_data (cover_path, mess.response_body.data);
+                               load_cover ();
+                       } catch (Error e) {
+                               warning (e.message);
+                       }
                });
        }
 
-       private void load_cover () {
+       private void load_cover () throws Error {
                var cover_path = get_cover_path ();
 
                if (!FileUtils.test (cover_path, FileTest.EXISTS))