curds: Create a playlist manager class

This replaces the code in playlist/__init__.py and turns it into a
class. This should make things easier to handle during testing, since we
can easily tear down the old instance and create a new one.

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

curds/playlist/__init__.py

@@ -1,12 +1,2 @@
 # Copyright 2019 (c) Anna Schumaker.
-from . import library
-import os
-
-plist_map = {"Library" : dict()}
-
-def lookup_library(path):
-    path  = os.path.abspath(path)
-    plist = plist_map["Library"].get(path, None)
-    if plist != None:
-        return plist
-    return plist_map["Library"].setdefault(path, library.LibraryPlaylist(path))
+from . import playlist

curds/playlist/manager.py

@@ -0,0 +1,15 @@
+# Copyright 2019 (c) Anna Schumaker.
+from . import library
+import os
+
+class LibraryManager(dict):
+    def __getitem__(self, key):
+        key = os.path.abspath(key)
+        if not key in self.keys():
+            self[key] = library.LibraryPlaylist(key)
+        return self.get(key)
+
+
+class PlaylistManager(dict):
+    def __init__(self):
+        self["Library"] = LibraryManager()

curds/playlist/test_manager.py

@@ -0,0 +1,36 @@
+# Copyright 2019 (c) Anna Schumaker.
+from . import library
+from . import manager
+from .. import threadqueue
+import os
+import unittest
+
+test_album   = os.path.abspath("./trier/Test Album")
+test_library = os.path.abspath("./trier/Test Library")
+
+class TestPlaylistManager(unittest.TestCase):
+    def setUp(self):
+        if not library.library_thread.is_alive():
+            library.library_thread = threadqueue.ThreadQueue()
+
+    def test_manager_init(self):
+        playman = manager.PlaylistManager()
+        self.assertIsInstance(playman, manager.PlaylistManager)
+        self.assertIsInstance(playman, dict)
+        self.assertIsInstance(playman["Library"], manager.LibraryManager)
+        self.assertIsInstance(playman["Library"], dict)
+
+    def test_manager_library(self):
+        playman = manager.PlaylistManager()
+        plist   = playman["Library"][test_library + "/"]
+        self.assertEqual(plist.name, test_library)
+        self.assertIsInstance(plist, library.LibraryPlaylist)
+        self.assertEqual(id(plist), id(playman["Library"][test_library]))
+
+        alist = playman["Library"][test_album]
+        self.assertIsInstance(alist, library.LibraryPlaylist)
+        self.assertNotEqual(id(plist), id(alist))
+        self.assertIn(alist, playman["Library"].values())
+        self.assertIn(plist, playman["Library"].values())
+
+        library.library_thread.stop()

curds/test_playlist.py

@@ -1,34 +0,0 @@
-# Copyright 2019 (c) Anna Schumaker.
-from . import playlist
-from . import threadqueue
-import os
-import unittest
-
-test_album   = os.path.abspath("./trier/Test Album")
-test_library = os.path.abspath("./trier/Test Library")
-
-class TestPlaylistManager(unittest.TestCase):
-    def setUpClass():
-        if not playlist.library.library_thread.is_alive():
-            playlist.library.library_thread = threadqueue.ThreadQueue()
-
-    def tearDownClass():
-        playlist.library.library_thread.stop()
-
-    def test_playman_init(self):
-        self.assertIsInstance(playlist.plist_map, dict)
-        self.assertEqual(playlist.plist_map["Library"], {})
-        self.assertTrue(playlist.library.library_thread.is_alive())
-
-    def test_playman_lookup_library(self):
-        plist = playlist.lookup_library(test_library + "/")
-        self.assertIsInstance(plist, playlist.library.LibraryPlaylist)
-        self.assertEqual(plist.name, test_library)
-        self.assertEqual(plist, playlist.plist_map["Library"][test_library])
-        self.assertEqual(playlist.lookup_library(test_library), plist)
-        self.assertEqual(len(playlist.plist_map["Library"].values()), 1)
-
-        alist = playlist.lookup_library(test_album)
-        self.assertIsInstance(alist, playlist.library.LibraryPlaylist)
-        self.assertIn(alist, playlist.plist_map["Library"].values())
-        self.assertIn(plist, playlist.plist_map["Library"].values())