curds: Add library playlist

This playlist represents all tracks in a given subdirectory, and is how
we control adding or removing tracks.

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

curds/playlist/library.py

@@ -0,0 +1,24 @@
+# Copyright 2019 (c) Anna Schumaker.
+from . import playlist
+from .. import tags
+from .. import threadqueue
+import os
+
+library_thread = threadqueue.ThreadQueue()
+
+class LibraryPlaylist(playlist.Playlist):
+    def __init__(self, path):
+        playlist.Playlist.__init__(self, os.path.abspath(path))
+        self.scan()
+
+    def scan(self):
+        library_thread.push(self.thread_scan)
+
+    def thread_add(self, path):
+        track = tags.Track.add(path)
+        self.add(track)
+
+    def thread_scan(self):
+        for dirname, subdirs, files in os.walk(self.name):
+            for f in files:
+                library_thread.push(self.thread_add, os.path.join(dirname, f))

curds/playlist/test_library.py

@@ -0,0 +1,33 @@
+# Copyright 2019 (c) Anna Schumaker.
+from . import library
+from . import playlist
+from .. import tags
+from .. import threadqueue
+import os
+import time
+import unittest
+
+test_library = os.path.abspath("./trier/Test Library")
+
+class TestLibraryPlaylist(unittest.TestCase):
+    def setUp(self):
+        library.library_thread.stop()
+        library.library_thread = threadqueue.ThreadQueue()
+        tags.tag_map.clear()
+
+    def tearDownClass():
+        library.library_thread.stop()
+
+    def test_playlist_library_init(self):
+        self.assertIsInstance(library.library_thread, threadqueue.ThreadQueue)
+
+        plist = library.LibraryPlaylist(test_library + "/")
+        self.assertIsInstance(plist, playlist.Playlist)
+        self.assertEqual(plist.name, test_library)
+
+    def test_playlist_library_scan(self):
+        plist = library.LibraryPlaylist(test_library)
+        self.assertGreater(library.library_thread.qsize(), 0)
+        library.library_thread.join()
+        self.assertEqual(len(plist), 1250)
+        self.assertEqual(plist.runtime(), "1 hour, 54 minutes, 35 seconds")

test_emmental.py

@@ -9,4 +9,5 @@ class TestEmmental(unittest.TestCase):
         self.assertIsNotNone(curds.tags)
         self.assertIsNotNone(curds.threadqueue)
         self.assertIsNotNone(curds.playlist)
+        self.assertIsNotNone(curds.playlist.library)
         self.assertIsNotNone(curds.playlist.playlist)