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srcantiguo/sessionmanager/manager.py

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+# -*- coding: cp1252 -*-
+""" Lightweigth module that saves session position across global config and performs validation of config files. """
+import os
+import logging
+import config
+import paths
+log = logging.getLogger("sessionmanager.manager")
+from sessions import session_exceptions
+
+manager = None
+def setup():
+    """ Creates the singleton instance used within TWBlue to access this object. """
+    global manager
+    if not manager:
+        manager = sessionManager()
+
+class sessionManager(object):
+
+    def get_current_session(self):
+        """ Returns the currently focused session, if valid. """
+        if self.is_valid(config.app["sessions"]["current_session"]):
+            return config.app["sessions"]["current_session"]
+
+    def set_current_session(self, sessionID):
+        config.app["sessions"]["current_session"] = sessionID
+        config.app.write()
+
+    def is_valid(self, id):
+        if not os.path.exists(os.path.join(paths.config_path(), id)):
+            raise session_exceptions.NonExistentSessionError("That session does not exist.")
+            config.app["sessions"]["current_session"] = ""
+            return False
+        else:
+            return True