+dynamic channel url

implementing dynamic channel url, if url doesnt exists in macrojson get it from user preferences.
(dont know why EOF keeps changing and git committing +1000 files.)

platformcode/config.py

@@ -82,6 +82,22 @@ def is_xbmc():
 def get_videolibrary_support():
     return True
 
+def get_channel_url(name):
+    try:
+        try:
+            import json
+        except:
+            import simplejson as json
+        ROOT_DIR = xbmc.translatePath(__settings__.getAddonInfo('Path'))
+        LOCAL_FILE = os.path.join(ROOT_DIR, "channels.json")
+        with open(LOCAL_FILE) as f:
+            data = json.load(f)
+            if data[name] is not None:
+                return data[name]
+            else:
+                return get_setting("channel_host", name)
+    except:
+        return get_setting("channel_host", name)
 
 def get_system_platform():
     """ fonction: pour recuperer la platform que xbmc tourne """