scanner: Create an EnableLibraryTask

For enabling or disabling library paths through an idle task

Implements: Issue #37 (Create an Idle Task to enable / disable library paths)
Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>

scanner/task.py

@@ -139,3 +139,13 @@ class RemoveLibrarySchedulerTask(Task):
     def run_task(self):
         return [ RemoveTask(tracks) for tracks in self.track_chunks() ] + \
                [ RemoveLibraryTask(self.library) ]
+
+
+class EnableLibraryTask(Task):
+    def __init__(self, library, enable):
+        Task.__init__(self)
+        self.library = library
+        self.enable = enable
+
+    def run_task(self):
+        self.library.set_property("enabled", self.enable)

scanner/test_task.py

@@ -227,3 +227,20 @@ class TestScannerRemoveLibrarySchedulerTask(unittest.TestCase):
         for i in range(1, 76):
             self.assertIsNone(db.track.Table.get(i))
         self.assertIsNone(db.library.Table.lookup(test_tracks))
+
+
+class TestEnableLibraryTask(unittest.TestCase):
+    def test_task(self):
+        lib = db.library.Table.find(test_tracks)
+        elt = task.EnableLibraryTask(lib, False)
+
+        self.assertIsInstance(elt, task.Task)
+        self.assertEqual(elt.library, lib)
+        self.assertEqual(elt.enable, False)
+
+        self.assertIsNone(elt.run_task())
+        self.assertFalse(lib.enabled)
+
+        elt.enable = True
+        self.assertIsNone(elt.run_task())
+        self.assertTrue(lib.enabled)