#!/usr/bin/env python  """ Handlers for a person for whom scheduling is performed. """  from email.mime.text import MIMEText from imiptools.config import MANAGER_PATH, MANAGER_URL from imiptools.content import Handler, get_address, get_uri, to_part, uri_dict, uri_items from imiptools.handlers.common import CommonFreebusy from socket import gethostname from vCalendar import to_node  def get_manager_url():     url_base = MANAGER_URL or "http://%s/" % gethostname()     return "%s/%s" % (url_base.rstrip("/"), MANAGER_PATH.lstrip("/"))  def get_object_url(uid):     return "%s/%s" % (get_manager_url().rstrip("/"), uid)  class PersonHandler(Handler):      "Handling mechanisms specific to people."      def _record_and_deliver(self, objtype, from_organiser=True, queue=False, cancel=False):          oa = self.require_organiser_and_attendees(from_organiser)         if not oa:             return False          (organiser, organiser_attr), attendees = organiser_item, attendees = oa          # Validate the organiser or attendee, ignoring spoofed requests.          if not self.validate_identities(from_organiser and [organiser_item] or attendees.items()):             return False          # Handle notifications and invitations.          if from_organiser:              # Process each attendee separately.              for attendee, attendee_attr in attendees.items():                  if not self.have_new_object(attendee, objtype):                     continue                  # Store the object and queue any request.                  self.store.set_event(attendee, self.uid, to_node(                     {objtype : [(self.details, {})]}                     ))                  if queue:                     self.store.queue_request(attendee, self.uid)                 elif cancel:                     self.store.cancel_event(attendee, self.uid)          # As organiser, update attendance.          else:             obj = self.get_object(organiser, objtype)              if obj and self.have_new_object(organiser, objtype, obj):                  # Get attendee details in a usable form.                  attendee_map = uri_dict(self.get_value_map("ATTENDEE"))                  for attendee, attendee_attr in attendees.items():                      # Update attendance in the loaded object.                      attendee_map[attendee] = attendee_attr                  # Set the new details and store the object.                  obj["ATTENDEE"] = attendee_map.items()                  self.store.set_event(organiser, self.uid, to_node(                     {objtype : [(obj, {})]}                     ))          return True      def _record_freebusy(self, from_organiser=True):          "Record free/busy information for the received information."          freebusy = []          for value in self.get_values("FREEBUSY") or []:             if not isinstance(value, list):                 value = [value]             for v in value:                 try:                     start, end = v.split("/", 1)                     freebusy.append((start, end))                 except ValueError:                     pass          for sender, sender_attr in uri_items(self.get_items(from_organiser and "ORGANIZER" or "ATTENDEE")):             for recipient in self.recipients:                 self.store.set_freebusy_for_other(get_uri(recipient), freebusy, sender)      def wrap(self, method, text, from_organiser=True, link=True):          "Wrap any valid message and pass it on to the recipient."          texts = []         texts.append(text)         if link:             texts.append("If your mail program cannot handle this "                          "message, you may view the details here:\n\n%s" %                          get_object_url(self.uid))          return method, MIMEText("\n".join(texts))  class Event(PersonHandler):      "An event handler."      def add(self):          # NOTE: Queue a suggested modification to any active event.          # The message is now wrapped and passed on to the recipient.          return "ADD", MIMEText("An addition to an event has been received.")      def cancel(self):          "Queue a cancellation of any active event."          self._record_and_deliver("VEVENT", from_organiser=True, queue=False, cancel=True)         return self.wrap("CANCEL", "A cancellation has been received.", from_organiser=True, link=True)      def counter(self):          # NOTE: Queue a suggested modification to any active event.          # The message is now wrapped and passed on to the recipient.          return "COUNTER", MIMEText("A counter proposal has been received.")      def declinecounter(self):          # NOTE: Queue a suggested modification to any active event.          # The message is now wrapped and passed on to the recipient.          return "DECLINECOUNTER", MIMEText("A declining counter proposal has been received.")      def publish(self):          "Register details of any relevant event."          self._record_and_deliver("VEVENT", from_organiser=True, queue=False)         return self.wrap("PUBLISH", "Details of an event have been received.", from_organiser=True, link=True)      def refresh(self):          "Update details of any active event."          self._record_and_deliver("VEVENT", from_organiser=True, queue=False)         return self.wrap("REFRESH", "An event update has been received.", from_organiser=True, link=True)      def reply(self):          "Record replies and notify the recipient."          self._record_and_deliver("VEVENT", from_organiser=False, queue=False)         return self.wrap("REPLY", "A reply has been received.", from_organiser=False, link=True)      def request(self):          "Hold requests and notify the recipient."          self._record_and_deliver("VEVENT", from_organiser=True, queue=True)          # The message is now wrapped and passed on to the recipient.          return "REQUEST", MIMEText("A request has been queued and can be viewed here: %s" % get_object_url(self.uid))  class Freebusy(PersonHandler, CommonFreebusy):      "A free/busy handler."      def publish(self):          "Register free/busy information."          # NOTE: This could be configured to not produce a message.          self._record_freebusy(from_organiser=True)         return self.wrap("PUBLISH", "A free/busy update has been received.", from_organiser=True, link=False)      def reply(self):          "Record replies and notify the recipient."          # NOTE: This could be configured to not produce a message.          self._record_freebusy(from_organiser=False)         return self.wrap("REPLY", "A reply has been received.", from_organiser=False, link=False)      def request(self):          """         Respond to a request by preparing a reply containing free/busy         information for each indicated attendee.         """          # NOTE: This should be subject to policy/preferences.          return CommonFreebusy.request(self)  class Journal(PersonHandler):      "A journal entry handler."      def add(self):          # NOTE: Queue a suggested modification to any active entry.          # The message is now wrapped and passed on to the recipient.          return "ADD", MIMEText("An addition to a journal entry has been received.")      def cancel(self):          # NOTE: Queue a suggested modification to any active entry.          # The message is now wrapped and passed on to the recipient.          return "CANCEL", MIMEText("A cancellation has been received.")      def publish(self):          # NOTE: Register details of any relevant entry.          # The message is now wrapped and passed on to the recipient.          self._record_and_deliver("VJOURNAL", from_organiser=True, queue=False)         return self.wrap("PUBLISH", "Details of a journal entry have been received.", from_organiser=True, link=False)  class Todo(PersonHandler):      "A to-do item handler."      def add(self):          # NOTE: Queue a suggested modification to any active item.          # The message is now wrapped and passed on to the recipient.          return "ADD", MIMEText("An addition to an item has been received.")      def cancel(self):          # NOTE: Queue a suggested modification to any active item.          # The message is now wrapped and passed on to the recipient.          return "CANCEL", MIMEText("A cancellation has been received.")      def counter(self):          # NOTE: Queue a suggested modification to any active item.          # The message is now wrapped and passed on to the recipient.          return "COUNTER", MIMEText("A counter proposal has been received.")      def declinecounter(self):          # NOTE: Queue a suggested modification to any active item.          # The message is now wrapped and passed on to the recipient.          return "DECLINECOUNTER", MIMEText("A declining counter proposal has been received.")      def publish(self):          "Register details of any relevant item."          self._record_and_deliver("VTODO", from_organiser=True, queue=False)         return self.wrap("PUBLISH", "Details of an item have been received.", from_organiser=True, link=True)      def refresh(self):          "Update details of any active item."          self._record_and_deliver("VTODO", from_organiser=True, queue=False)         return self.wrap("REFRESH", "An item update has been received.", from_organiser=True, link=True)      def reply(self):          "Record replies and notify the recipient."          self._record_and_deliver("VTODO", from_organiser=False, queue=False)         return self.wrap("REPLY", "A reply has been received.", from_organiser=False, link=True)      def request(self):          "Hold requests and notify the recipient."          self._record_and_deliver("VTODO", from_organiser=True, queue=True)          # The message is now wrapped and passed on to the recipient.          return "REQUEST", MIMEText("A request has been queued.")  # Handler registry.  handlers = [     ("VFREEBUSY",   Freebusy),     ("VEVENT",      Event),     ("VTODO",       Todo),     ("VJOURNAL",    Journal),     ]  # vim: tabstop=4 expandtab shiftwidth=4