[gnome-music/wip/mschraal/artisttile-delayed-retrieval-fix: 1/2] artistart: Make file exists check async

[Marinus Schraal <mschraal src gnome org>]

commit 86a5376274874d4c84d485ed7647c442120f3034
Author: Marinus Schraal <mschraal gnome org>
Date:   Sun Aug 15 12:05:36 2021 +0200

    artistart: Make file exists check async

 gnomemusic/artistart.py | 30 ++++++++++++++++++------------
 1 file changed, 18 insertions(+), 12 deletions(-)
---
diff --git a/gnomemusic/artistart.py b/gnomemusic/artistart.py
index 7461bd823..ba6b5ff39 100644
--- a/gnomemusic/artistart.py
+++ b/gnomemusic/artistart.py
@@ -24,7 +24,7 @@
 
 import gi
 gi.require_version("MediaArt", "2.0")
-from gi.repository import GObject, MediaArt
+from gi.repository import GLib, GObject, Gio, MediaArt
 
 
 class ArtistArt(GObject.GObject):
@@ -40,21 +40,27 @@ class ArtistArt(GObject.GObject):
         super().__init__()
 
         self._coreartist = coreartist
+        self._coregrilo = application.props.coregrilo
         self._artist = self._coreartist.props.artist
 
-        if self._in_cache():
-            return
-
-        application.props.coregrilo.get_artist_art(self._coreartist)
+        self._in_cache()
 
     def _in_cache(self):
-        success, thumb_file = MediaArt.get_file(
-            self._artist, None, "artist")
-        if (not success
-                or not thumb_file.query_exists()):
+        success, thumb_file = MediaArt.get_file(self._artist, None, "artist")
+
+        if not success:
             self._coreartist.props.thumbnail = "generic"
-            return False
+            return
+
+        def on_query_info_finished(obj, res):
+            try:
+                result = obj.query_info_finish(res)
+            except GLib.Error as error:
+                self._coregrilo.get_artist_art(self._coreartist)
+                return
 
-        self._coreartist.props.thumbnail = thumb_file.get_uri()
+            self._coreartist.props.thumbnail = thumb_file.get_uri()
 
-        return True
+        thumb_file.query_info_async(
+            Gio.FILE_ATTRIBUTE_STANDARD_TYPE, Gio.FileQueryInfoFlags.NONE,
+            GLib.PRIORITY_LOW, None, on_query_info_finished)