108 lines
3.4 KiB
Python
108 lines
3.4 KiB
Python
from datetime import datetime
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from django.conf import settings
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from django.contrib.sessions.models import Session
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from django.utils.html import urlize
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from sockjs.tornado import SockJSConnection
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class ChatboxSocketHandler(SockJSConnection):
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"""
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Websocket handler for the chatbox.
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"""
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clients = set()
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def on_open(self, info):
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"""
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Checks connecting user and adds his client to the clients list.
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"""
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from openslides.participant.models import User
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# TODO: Use the django way to get the session to be compatible with
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# other auth-backends; see comment in pull request #1220:
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# https://github.com/OpenSlides/OpenSlides/pull/1220#discussion_r11565705
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session_key = info.get_cookie(settings.SESSION_COOKIE_NAME).value
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session = Session.objects.get(session_key=session_key)
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try:
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self.user = User.objects.get(pk=session.get_decoded().get('_auth_user_id'))
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except User.DoesNotExist:
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return_value = False
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else:
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if self.user.has_perm('core.can_use_chat'):
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self.clients.add(self)
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return_value = True
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else:
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return_value = False
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return return_value
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def on_message(self, message):
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"""
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Sends the given message to all clients.
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Also appends the message to the cache and removes old messages if there
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are more than 100.
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"""
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if self.user.has_perm('core.can_use_chat') and message:
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message_object = ChatMessage(person=self.user, message=message)
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chat_messages.append(message_object)
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if len(chat_messages) > 100:
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chat_messages.pop(0)
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self.broadcast(
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self.clients,
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'%s %s %s' % (message_object.html_time(),
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message_object.html_person(),
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urlize(message_object.message)))
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def on_close(self):
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"""
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Removes client from the clients list.
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"""
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self.clients.remove(self)
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class ChatMessage(object):
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"""
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Class for all chat messages. They are stored in the chat_messages object.
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The argument person has to be a Person object, the argument message has to
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be the message as string. The argument color can be a three-tuple of RGB
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color values. Default is black (0, 0, 0).
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"""
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def __init__(self, person, message, color=None):
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self.person = person
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self.message = message
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self.color = color or (0, 0, 0)
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self.time = datetime.now()
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def html_time(self):
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"""
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Returns the message time in html style.
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"""
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return '<small class="grey">%s</small>' % self.time.strftime('%H:%M')
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def html_person(self):
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"""
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Returns the message sender name in html style.
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"""
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return "<span style='color:%(color)s;'>%(person)s:</span>" % {
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'color': 'rgb(%d,%d,%d)' % self.color,
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'person': self.person.clean_name}
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chat_messages = []
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"""
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Cache with all messages during livetime of the server.
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"""
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def chat_messages_context_processor(request):
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"""
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Adds all chat messages to the request context as template context processor.
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Returns None if the request user has no permission to use the chat.
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"""
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if request.user.has_perm('core.can_use_chat'):
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value = chat_messages
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else:
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value = None
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return {'chat_messages': value}
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