adds message queue

Feature #368 - messaging framework
* message levels are debug, info, success, warning, and error
* display mechanism - base.html includes messages.html for now
* fetch_messages and add_message are available to all templates
  using jinja2 environment.globals
* messages are displayed and cleared. no persistence

1 files changed, 34 insertions, 0 deletions

diff --git a/mediagoblin/messages.py b/mediagoblin/messages.py
new file mode 100644
index 00000000..afe6ee7e
--- /dev/null
+++ b/mediagoblin/messages.py
@@ -0,0 +1,34 @@
+# GNU MediaGoblin -- federated, autonomous media hosting
+# Copyright (C) 2011 Free Software Foundation, Inc
+#
+# This program 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.
+#
+# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+
+DEBUG = 'debug'
+INFO = 'info'
+SUCCESS = 'success'
+WARNING = 'warning'
+ERROR = 'error'
+
+def add_message(request, level, text):
+    messages = request.session.setdefault('messages', [])
+    messages.append({'level': level, 'text': text})
+    request.session.save()
+
+def fetch_messages(request, clear_from_session=True):
+    messages = request.session.get('messages')
+    if messages and clear_from_session:
+        # Save that we removed the messages from the session
+        request.session['messages'] = []
+        request.session.save()
+    return messages