0e025d9d71
Allow user to configure messages to display to the user after they login. Change-Id: I6dc0318708d0f964e52c8b127718297fc723651c Implements: blueprint message-of-the-day
151 lines
4.2 KiB
Python
151 lines
4.2 KiB
Python
# Copyright (C) 2015 Yahoo! Inc. All Rights Reserved.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License. You may obtain
|
|
# a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
|
|
import glob
|
|
import json
|
|
import logging
|
|
import os
|
|
|
|
from django.utils.safestring import mark_safe
|
|
from django.utils.translation import ugettext_lazy as _
|
|
|
|
from horizon import exceptions
|
|
from horizon import messages
|
|
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
_MESSAGES_CACHE = None
|
|
_MESSAGES_MTIME = None
|
|
|
|
|
|
class JSONMessage(object):
|
|
|
|
INFO = messages.info
|
|
SUCCESS = messages.success
|
|
WARNING = messages.warning
|
|
ERROR = messages.error
|
|
|
|
MESSAGE_LEVELS = {
|
|
'info': INFO,
|
|
'success': SUCCESS,
|
|
'warning': WARNING,
|
|
'error': ERROR
|
|
}
|
|
|
|
def __init__(self, path, fail_silently=False):
|
|
self._path = path
|
|
self._data = ''
|
|
|
|
self.failed = False
|
|
self.fail_silently = fail_silently
|
|
self.message = ''
|
|
self.level = self.INFO
|
|
self.level_name = 'info'
|
|
|
|
def _read(self):
|
|
with open(self._path, 'rb') as file_obj:
|
|
self._data = file_obj.read()
|
|
|
|
def _parse(self):
|
|
attrs = {}
|
|
try:
|
|
data = self._data.decode('utf-8')
|
|
attrs = json.loads(data)
|
|
except ValueError as exc:
|
|
self.failed = True
|
|
|
|
msg = _("Message json file '%(path)s' is malformed."
|
|
" %(exception)s")
|
|
msg = msg % {'path': self._path, 'exception': str(exc)}
|
|
if self.fail_silently:
|
|
LOG.warning(msg)
|
|
else:
|
|
raise exceptions.MessageFailure(msg)
|
|
else:
|
|
level_name = attrs.get('level', 'info')
|
|
if level_name in self.MESSAGE_LEVELS:
|
|
self.level_name = level_name
|
|
|
|
self.level = self.MESSAGE_LEVELS.get(self.level_name, self.INFO)
|
|
self.message = attrs.get('message', '')
|
|
|
|
def load(self):
|
|
"""Read and parse the message file."""
|
|
try:
|
|
self._read()
|
|
self._parse()
|
|
except Exception as exc:
|
|
self.failed = True
|
|
|
|
msg = _("Error processing message json file '%(path)s': "
|
|
"%(exception)s")
|
|
msg = msg % {'path': self._path, 'exception': str(exc)}
|
|
if self.fail_silently:
|
|
LOG.warning(msg)
|
|
else:
|
|
raise exceptions.MessageFailure(msg)
|
|
|
|
def send_message(self, request):
|
|
if self.failed:
|
|
return
|
|
self.level(request, mark_safe(self.message))
|
|
|
|
|
|
def _is_path(path):
|
|
if os.path.exists(path) and os.path.isdir(path):
|
|
return True
|
|
else:
|
|
return False
|
|
|
|
|
|
def _get_processed_messages(messages_path):
|
|
msgs = list()
|
|
|
|
if not _is_path(messages_path):
|
|
LOG.error('%s is not a valid messages path.', messages_path)
|
|
return msgs
|
|
|
|
# Get all files from messages_path with .json extension
|
|
for fname in glob.glob(os.path.join(messages_path, '*.json')):
|
|
fpath = os.path.join(messages_path, fname)
|
|
|
|
msg = JSONMessage(fpath, fail_silently=True)
|
|
msg.load()
|
|
|
|
if not msg.failed:
|
|
msgs.append(msg)
|
|
|
|
return msgs
|
|
|
|
|
|
def process_message_notification(request, messages_path):
|
|
"""Process all the msg file found in the message directory"""
|
|
if not messages_path:
|
|
return
|
|
|
|
global _MESSAGES_CACHE
|
|
global _MESSAGES_MTIME
|
|
|
|
# NOTE (lhcheng): Cache the processed messages to avoid parsing
|
|
# the files every time. Check directory modification time if
|
|
# reload is necessary.
|
|
if (_MESSAGES_CACHE is None
|
|
or _MESSAGES_MTIME != os.path.getmtime(messages_path)):
|
|
_MESSAGES_CACHE = _get_processed_messages(messages_path)
|
|
_MESSAGES_MTIME = os.path.getmtime(messages_path)
|
|
|
|
for msg in _MESSAGES_CACHE:
|
|
msg.send_message(request)
|