Use Path object

weboob/tools/path.py

@@ -0,0 +1,56 @@
+# -*- coding: utf-8 -*-
+
+# Copyright(C) 2010-2011 Nicolas Duhamel
+#
+# This file is part of weboob.
+#
+# weboob is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# weboob is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with weboob. If not, see <http://www.gnu.org/licenses/>.
+import urllib
+import posixpath
+import copy
+
+class Path(object):
+    def __init__(self):
+        self._working_path = []
+        self._previous = self._working_path
+        
+            
+    def extend(self, user_input):
+        
+        user_input = urllib.quote_plus(user_input)
+        user_input = posixpath.normpath(user_input)
+        
+        escape = lambda s: s.replace('/', '%2F')
+        current_path = map(escape, self._working_path)
+        
+        abspath =  posixpath.normpath(posixpath.join('/' + '/'.join(current_path), user_input))
+        
+        abspath = abspath.split('/')[1:]
+        while len(abspath) > 0 and abspath[0] == u'': del abspath[0]
+        
+        final_parse = map(urllib.unquote_plus, abspath)
+        
+        self._previous = self._working_path
+        
+        if len(final_parse) == 0:
+            self._working_path = []
+        
+        self._working_path = final_parse
+    
+    def restore(self):
+        self._working_path = self._previous
+        
+            
+    def get(self):
+        return copy.copy(self._working_path)