Add support for activity list filters

trovebox/api/api_base.py

@@ -6,3 +6,13 @@ class ApiBase(object):
     def __init__(self, client):
         self._client = client
 
+    @staticmethod
+    def _build_filter_string(filters):
+        """
+        :param filters: dictionary containing the filters
+        :returns: filter_string formatted for an API endpoint
+        """
+        filter_string = ""
+        for filter in filters:
+            filter_string += "%s-%s/" % (filter, filters[filter])
+        return filter_string