From e7017f3ccb907e3219c0bbfe488d86021298b6aa Mon Sep 17 00:00:00 2001
From: Thomas Adamcik <thomas@adamcik.no>
Date: Thu, 23 Jan 2014 00:40:18 +0100
Subject: [PATCH] mpd: Add protocol.position_or_range converter

---
 mopidy/mpd/protocol/__init__.py | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/mopidy/mpd/protocol/__init__.py b/mopidy/mpd/protocol/__init__.py
index 06a1b3ab..9e85d058 100644
--- a/mopidy/mpd/protocol/__init__.py
+++ b/mopidy/mpd/protocol/__init__.py
@@ -108,6 +108,21 @@ def boolean(value):
     raise ValueError('%r is not 0 or 1' % value)
 
 
+def position_or_range(value):
+    # TODO: test and check that values are positive
+    if ':' in value:
+        start, stop = value.split(':', 1)
+        start = int(start)
+        if stop.strip():
+            stop = int(stop)
+        else:
+            stop = None
+    else:
+        start = int(value)
+        stop = start + 1
+    return slice(start, stop)
+
+
 class Commands(object):
     def __init__(self):
         self.handlers = {}