libsaria: Remove old ids from library

If the song was deleted it should be removed.

This patch also addse in the Track() class that should have been in the
last patch.

libsaria/sources/library/track.py

@@ -0,0 +1,28 @@
+# Bryan Schumaker (5 / 21 / 2011)
+
+import tagpy
+import datetime
+
+FileRef   = tagpy.FileRef
+timedelta = datetime.timedelta
+
+class Track:
+	def __init__(self, filepath):
+		ref   = FileRef(filepath)
+		tags  = ref.tag()
+		audio = ref.audioProperties()
+
+		self.artist   = tags.artist or u"Unknown Artist"
+		self.album    = tags.album  or u"Unknown Album"
+		self.title    = tags.title  or u"Unknown Title"
+		self.track    = tags.track
+		self.genre    = tags.genre
+		self.year     = tags.year
+		self.seconds  = audio.length
+		self.filepath = filepath
+
+		lenstr = "%s" % timedelta(seconds=self.seconds)
+		if lenstr[:2] == "0:":
+			self.lenstr = lenstr[2:]
+		else:
+			self.lenstr = lenstr

libsaria/sources/library/update.py

@@ -23,6 +23,11 @@ def scan_path(path):
 			file_map[song_id(file)] = file
 	return file_map
 
+def rm_old_ids(old_ids, new_ids, tracks):
+	to_remove = old_ids - new_ids
+	for id in to_remove:
+		del tracks[id]
+
 def add_new_ids(old_ids, new_ids, tracks, file_map):
 	to_add = new_ids - old_ids
 	for id in to_add:
@@ -37,6 +42,7 @@ def update_path(path, tracks):
 	old_ids  = set(tracks.keys())
 	new_ids  = set(file_map.keys())
 
+	rm_old_ids(old_ids, new_ids, tracks)
 	add_new_ids(old_ids, new_ids, tracks, file_map)
 
 def update():