curds: Keep a list of created tracks

We'll use this for scanning and updating the library later.  For now,
just keep everything in a list and do a uniqueness test whenever
something new is added.

Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>

curds/test_track.py

@@ -1,4 +1,5 @@
 # Copyright 2019 (c) Anna Schumaker.
+import mutagen
 import unittest
 import os
 import track
@@ -19,6 +20,7 @@ class TestTrackClass(unittest.TestCase):
         self.assertEqual(t.album.date,   2019)
         self.assertEqual(t.album.genre, "Test")
         self.assertEqual(t.album.albumartist, "Test Artist")
+        self.assertEqual(len(track.tracklist), 0)
 
     def test_init_empty(self):
         p = [ test_tracks, "00 - Empty Track.ogg" ]
@@ -33,6 +35,7 @@ class TestTrackClass(unittest.TestCase):
         self.assertEqual(t.album.date,   0)
         self.assertEqual(t.album.genre, "Unknown")
         self.assertEqual(t.album.albumartist, "Unknown Artist")
+        self.assertEqual(len(track.tracklist), 0)
 
     def test_init_discno_detect(self):
         join = os.path.join
@@ -46,5 +49,21 @@ class TestTrackClass(unittest.TestCase):
         self.assertEqual(track.Track(join(test_tracks, "09 - Test {Disc 02}.ogg")).discnumber,    2)
         self.assertEqual(track.Track(join(test_tracks, "10 - Test {Disc 20}.ogg")).discnumber,   20)
 
+    def test_track_add(self):
+        t = track.add(os.path.join(test_tracks, "01 - Test Track.ogg"))
+        self.assertIsNotNone(t)
+        self.assertEqual(len(track.tracklist), 1)
+        self.assertIn(t, track.tracklist)
+
+        self.assertIsNone(track.add(os.path.join(test_tracks, "01 - Test Track.ogg")))
+        self.assertEqual(len(track.tracklist), 1)
+        self.assertIsNone(track.add("99 - No Such Track.ogg"))
+        self.assertEqual(len(track.tracklist), 1)
+
+        u = track.add(os.path.join(test_tracks, "02 - Test {Disc 2}.ogg"))
+        self.assertIsNotNone(u)
+        self.assertEqual(len(track.tracklist), 2)
+        self.assertIn(u, track.tracklist)
+
 if __name__ == '__main--':
         unittest.main()

curds/track.py

@@ -5,6 +5,7 @@ import os
 import re
 
 discno_map = { "one" : "1", "two" : "2", "three" : "3", "four" : "4", "five" : "5" }
+tracklist  = [ ]
 
 class Track:
     def __init__(self, path):
@@ -23,3 +24,13 @@ class Track:
         match  = re.search("([1-9][0-9]*)|one|two|three|four|five", discno.lower())
         if match:
             self.discnumber = int(discno_map.get(match.group(), match.group()))
+
+
+def add(path):
+    try:
+        if not any(t.path == path for t in tracklist):
+            track = Track(path)
+            tracklist.append(track)
+            return track
+    except mutagen.MutagenError:
+        return None