152 lines
3.9 KiB
Python
152 lines
3.9 KiB
Python
# Copyright 2014, Ian Gulliver
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import webapp2
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from google.appengine.api import channel
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from google.appengine.ext import db
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from cosmopolite.lib import auth
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from cosmopolite.lib import models
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from cosmopolite.lib import security
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from cosmopolite.lib import session
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from cosmopolite.lib import utils
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import config
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def CreateChannel(google_user, client, args):
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token = channel.create_channel(
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client_id=str(client.key()),
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duration_minutes=config.CHANNEL_DURATION_SECONDS / 60)
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events = [x.ToEvent() for x in client.parent().GetStateEntries()]
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if google_user:
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events.append({
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'event_type': 'login',
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'google_user': google_user.email(),
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})
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else:
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events.append({
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'event_type': 'logout',
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})
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return {
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'token': token,
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'events': events,
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}
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def SendMessage(google_user, client, args):
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subject = args['subject']
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message = args['message']
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key = args.get('key', None)
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models.Subject.FindOrCreate(subject).SendMessage(message, client.parent_key(), key)
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return {}
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@db.transactional()
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def SetValue(google_user, client, args):
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entry_key = args['key']
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entry_value = args['value']
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public = (args['public'] == 'true')
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entries = (models.StateEntry.all()
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.ancestor(client.parent_key())
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.filter('entry_key =', entry_key)
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.fetch(1))
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if entries:
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entry = entries[0]
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entry.entry_value = entry_value
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entry.public = public
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else:
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entry = models.StateEntry(
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parent=client.parent_key(),
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entry_key=entry_key,
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entry_value=entry_value,
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public=public)
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entry.put()
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event = entry.ToEvent()
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clients = (models.Client.all()
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.ancestor(client.parent_key()))
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for client in clients:
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client.SendEvent(event)
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return {}
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def Subscribe(google_user, client, args):
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subject = models.Subject.FindOrCreate(args['subject'])
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messages = args.get('messages', 0)
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keys = args.get('keys', [])
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ret = {
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'events': models.Subscription.FindOrCreate(subject, client, messages),
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}
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for key in keys:
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message = models.Subject.GetKey(key)
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if message:
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ret['events'].append(message)
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return ret
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def Unsubscribe(google_user, client, args):
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subject = models.Subject.FindOrCreate(args['subject'])
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models.Subscription.Remove(subject, client)
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return {}
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class APIWrapper(webapp2.RequestHandler):
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_COMMANDS = {
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'createChannel': CreateChannel,
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'sendMessage': SendMessage,
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'setValue': SetValue,
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'subscribe': Subscribe,
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'unsubscribe': Unsubscribe,
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}
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@utils.chaos_monkey
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@utils.expects_json
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@utils.returns_json
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@utils.local_namespace
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@security.google_user_xsrf_protection
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@security.weak_security_checks
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@session.session_required
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def post(self):
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ret = {
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'status': 'ok',
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'responses': [],
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'events': [],
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}
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for command in self.request_json['commands']:
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callback = self._COMMANDS[command['command']]
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result = callback(
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self.verified_google_user,
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self.client,
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command.get('arguments', {}))
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# Magic: if result contains "events", haul them up a level so the
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# client can see them as a single stream.
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ret['events'].extend(result.pop('events', []))
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ret['responses'].append(result)
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return ret
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app = webapp2.WSGIApplication([
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(config.URL_PREFIX + '/api', APIWrapper),
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])
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