libsaria: Return album art as part of all_attrs()

If the album art exists, I might as well return it so it can be set in
the main gtk thread.  If it doesn't exist, I'll trigger a web search for
it.

libsaria/path/lastfm.py

@@ -68,13 +68,19 @@ def lfm_cache_album(artist, album, title, file):
 		pass
 	return False
 
-def get_album_art(file):
-	attrs = sources.all_attrs()
+def get_album_art(attrs):
+	print attrs
 	file = cache.get_item(attrs["artist"], attrs["album"], attrs["title"], "Folder.jpg", lfm_cache_album)
 	callbacks.get_art(file, attrs["id"])
 
-def get_artwork(file):
-	threading.Thread(target=get_album_art, args=(file,)).start()
+def get_artwork(attrs):
+	threading.Thread(target=get_album_art, args=(attrs,)).start()
+
+def test_artwork(attrs):
+	path = cache.test_item(attrs["artist"], attrs["album"], "Folder.jpg", "images/ocarina.png")
+	if path == "images/ocarina.png":
+		get_artwork(attrs)
+	return path
 
 def set_artwork(artist, album, img_path):
 	cache.copy_in_file(artist, album, "Folder.jpg", img_path)

libsaria/sources/__init__.py

@@ -79,6 +79,7 @@ def all_attrs():
 	if found != False:
 		res["like"]  = attrs.get_like("like")
 		res["count"] = attrs.get_count("count")
+		res["art"]   = libsaria.path.lastfm.test_artwork(res)
 	return res
 
 def filter(text):

libsaria/storage/cache.py

@@ -39,6 +39,12 @@ def get_item(artist, album, title, file, cache_func):
 		cache_path = fill_cache(artist, album, title, cache_func, cache_path)
 	return cache_path
 
+def test_item(artist, album, file, default):
+	cache_path = make_cache_path(artist, album, file)
+	if not file_exists(cache_path):
+		return default
+	return cache_path
+
 def copy_in_file(artist, album, file, orig_file):
 	cache_path = make_cache_path(artist, album, file)
 	orig = open(orig_file)