imip-agent

Annotated imiptools/handlers/resource.py

1153:967f8a54ef75
1126:df5219c279f5
1058:bb1b8e13ef4d
2016-04-19 Paul Boddie file changeset files shortlog Avoid comparing floating datetimes where only date values should be compared. freebusy-collections
paul@48 1 
#!/usr/bin/env python
paul@48 2 
 
 paul@48      3 
"""
 
 paul@48      4 
Handlers for a resource.
 
 paul@146      5 
 
 paul@1025      6 
Copyright (C) 2014, 2015, 2016 Paul Boddie <paul@boddie.org.uk>
 
 paul@146      7 
 
 paul@146      8 
This program is free software; you can redistribute it and/or modify it under
 
 paul@146      9 
the terms of the GNU General Public License as published by the Free Software
 
 paul@146     10 
Foundation; either version 3 of the License, or (at your option) any later
 
 paul@146     11 
version.
 
 paul@146     12 
 
 paul@146     13 
This program is distributed in the hope that it will be useful, but WITHOUT
 
 paul@146     14 
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 
 paul@146     15 
FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 
 paul@146     16 
details.
 
 paul@146     17 
 
 paul@146     18 
You should have received a copy of the GNU General Public License along with
 
 paul@146     19 
this program.  If not, see <http://www.gnu.org/licenses/>.
 
 paul@48     20 
"""
 
 paul@48     21 
 
 paul@737     22 
from imiptools.data import get_address, to_part, uri_dict
 
 paul@418     23 
from imiptools.handlers import Handler
 
 paul@683     24 
from imiptools.handlers.common import CommonFreebusy, CommonEvent
 
 paul@1039     25 
from imiptools.handlers.scheduling import apply_scheduling_functions, \
 
 paul@1040     26 
                                          confirm_scheduling, \
 
 paul@1040     27 
                                          finish_scheduling, \
 
 paul@1040     28 
                                          retract_scheduling
 
 paul@48     29 
 
 paul@725     30 
class ResourceHandler(CommonEvent, Handler):
 
 paul@131     31 
 
 paul@131     32 
    "Handling mechanisms specific to resources."
 
 paul@131     33 
 
 paul@937     34 
    def _process(self, handle_for_attendee):
 
 paul@131     35 
 
 paul@420     36 
        """
 
 paul@420     37 
        Record details from the incoming message, using the given
 
 paul@420     38 
        'handle_for_attendee' callable to process any valid message
 
 paul@420     39 
        appropriately.
 
 paul@420     40 
        """
 
 paul@420     41 
 
 paul@131     42 
        oa = self.require_organiser_and_attendees()
 
 paul@131     43 
        if not oa:
 
 paul@131     44 
            return None
 
 paul@131     45 
 
 paul@131     46 
        organiser_item, attendees = oa
 
 paul@131     47 
 
 paul@468     48 
        # Process for the current user, a resource as attendee.
 
 paul@131     49 
 
 paul@738     50 
        if not self.have_new_object():
 
 paul@468     51 
            return None
 
 paul@131     52 
 
 paul@468     53 
        # Collect response objects produced when handling the request.
 
 paul@131     54 
 
 paul@662     55 
        handle_for_attendee()
 
 paul@131     56 
 
 paul@676     57 
    def _add_for_attendee(self):
 
 paul@131     58 
 
 paul@420     59 
        """
 
 paul@676     60 
        Attempt to add a recurrence to an existing object for the current user.
 
 paul@676     61 
        This does not request a response concerning participation, apparently.
 
 paul@420     62 
        """
 
 paul@420     63 
 
 paul@737     64 
        # Request details where configured, doing so for unknown objects anyway.
 
 paul@676     65 
 
 paul@737     66 
        if self.will_refresh():
 
 paul@737     67 
            self.make_refresh()
 
 paul@676     68 
            return
 
 paul@676     69 
 
 paul@676     70 
        # Record the event as a recurrence of the parent object.
 
 paul@676     71 
 
 paul@676     72 
        self.update_recurrenceid()
 
 paul@737     73 
        self.store.set_event(self.user, self.uid, self.recurrenceid, self.obj.to_node())
 
 paul@676     74 
 
 paul@859     75 
        # Remove any previous cancellations involving this event.
 
 paul@859     76 
 
 paul@859     77 
        self.store.remove_cancellation(self.user, self.uid, self.recurrenceid)
 
 paul@859     78 
 
 paul@676     79 
        # Update free/busy information.
 
 paul@676     80 
 
 paul@676     81 
        self.update_event_in_freebusy(for_organiser=False)
 
 paul@676     82 
 
 paul@1039     83 
        # Confirm the scheduling of the recurrence.
 
 paul@1039     84 
 
 paul@1039     85 
        self.confirm_scheduling()
 
 paul@1039     86 
 
 paul@676     87 
    def _schedule_for_attendee(self):
 
 paul@676     88 
 
 paul@676     89 
        "Attempt to schedule the current object for the current user."
 
 paul@676     90 
 
 paul@737     91 
        attendee_attr = uri_dict(self.obj.get_value_map("ATTENDEE"))[self.user]
 
 paul@1040     92 
 
 paul@1040     93 
        # Attempt to schedule the event.
 
 paul@1040     94 
 
 paul@936     95 
        scheduled = self.schedule()
 
 paul@655     96 
 
 paul@1040     97 
        try:
 
 paul@1040     98 
            # Update the participation of the resource in the object.
 
 paul@1040     99 
            # Update free/busy information.
 
 paul@662    100 
 
 paul@1040    101 
            if scheduled in ("ACCEPTED", "DECLINED"):
 
 paul@1040    102 
                method = "REPLY"
 
 paul@1040    103 
                attendee_attr = self.update_participation(scheduled)
 
 paul@662    104 
 
 paul@1040    105 
                self.update_event_in_freebusy(for_organiser=False)
 
 paul@1040    106 
                self.remove_event_from_freebusy_offers()
 
 paul@131    107 
 
 paul@1040    108 
                # Set the complete event or an additional occurrence.
 
 paul@334    109 
 
 paul@1040    110 
                event = self.obj.to_node()
 
 paul@1040    111 
                self.store.set_event(self.user, self.uid, self.recurrenceid, event)
 
 paul@381    112 
 
 paul@1040    113 
                # Remove additional recurrences if handling a complete event.
 
 paul@1040    114 
                # Also remove any previous cancellations involving this event.
 
 paul@381    115 
 
 paul@1040    116 
                if not self.recurrenceid:
 
 paul@1040    117 
                    self.store.remove_recurrences(self.user, self.uid)
 
 paul@1040    118 
                    self.store.remove_cancellations(self.user, self.uid)
 
 paul@1040    119 
                else:
 
 paul@1040    120 
                    self.store.remove_cancellation(self.user, self.uid, self.recurrenceid)
 
 paul@361    121 
 
 paul@1040    122 
                if scheduled == "ACCEPTED":
 
 paul@1040    123 
                    self.confirm_scheduling()
 
 paul@1039    124 
 
 paul@1040    125 
            # For countered proposals, record the offer in the resource's
 
 paul@1040    126 
            # free/busy collection.
 
 paul@1039    127 
 
 paul@1040    128 
            elif scheduled == "COUNTER":
 
 paul@1040    129 
                method = "COUNTER"
 
 paul@1040    130 
                self.update_event_in_freebusy_offers()
 
 paul@1040    131 
 
 paul@1040    132 
            # For inappropriate periods, reply declining participation.
 
 paul@936    133 
 
 paul@1040    134 
            else:
 
 paul@1040    135 
                method = "REPLY"
 
 paul@1040    136 
                attendee_attr = self.update_participation("DECLINED")
 
 paul@936    137 
 
 paul@1040    138 
        # Confirm any scheduling.
 
 paul@936    139 
 
 paul@1040    140 
        finally:
 
 paul@1040    141 
            self.finish_scheduling()
 
 paul@936    142 
 
 paul@580    143 
        # Make a version of the object with just this attendee, update the
 
 paul@580    144 
        # DTSTAMP in the response, and return the object for sending.
 
 paul@574    145 
 
 paul@745    146 
        self.update_sender(attendee_attr)
 
 paul@574    147 
        self.obj["ATTENDEE"] = [(self.user, attendee_attr)]
 
 paul@574    148 
        self.update_dtstamp()
 
 paul@662    149 
        self.add_result(method, map(get_address, self.obj.get_values("ORGANIZER")), to_part(method, [self.obj.to_node()]))
 
 paul@131    150 
 
 paul@468    151 
    def _cancel_for_attendee(self):
 
 paul@131    152 
 
 paul@420    153 
        """
 
 paul@468    154 
        Cancel for the current user their attendance of the event described by
 
 paul@468    155 
        the current object.
 
 paul@420    156 
        """
 
 paul@420    157 
 
 paul@580    158 
        # Update free/busy information.
 
 paul@131    159 
 
 paul@580    160 
        self.remove_event_from_freebusy()
 
 paul@580    161 
 
 paul@672    162 
        # Update the stored event and cancel it.
 
 paul@672    163 
 
 paul@672    164 
        self.store.set_event(self.user, self.uid, self.recurrenceid, self.obj.to_node())
 
 paul@672    165 
        self.store.cancel_event(self.user, self.uid, self.recurrenceid)
 
 paul@672    166 
 
 paul@1039    167 
        # Retract the scheduling of the event.
 
 paul@1039    168 
 
 paul@1039    169 
        self.retract_scheduling()
 
 paul@1039    170 
 
 paul@710    171 
    def _revoke_for_attendee(self):
 
 paul@710    172 
 
 paul@710    173 
        "Revoke any counter-proposal recorded as a free/busy offer."
 
 paul@710    174 
 
 paul@710    175 
        self.remove_event_from_freebusy_offers()
 
 paul@710    176 
 
 paul@936    177 
    # Scheduling details.
 
 paul@936    178 
 
 paul@1058    179 
    def get_scheduling_functions(self):
 
 paul@1058    180 
 
 paul@1058    181 
        "Return the scheduling functions for the resource."
 
 paul@1058    182 
 
 paul@1058    183 
        return self.get_preferences().get("scheduling_function",
 
 paul@1058    184 
            "schedule_in_freebusy").split("\n")
 
 paul@1058    185 
 
 paul@936    186 
    def schedule(self):
 
 paul@936    187 
 
 paul@936    188 
        """
 
 paul@936    189 
        Attempt to schedule the current object, returning an indication of the
 
 paul@936    190 
        kind of response to be returned: "COUNTER" for counter-proposals,
 
 paul@936    191 
        "ACCEPTED" for acceptances, "DECLINED" for rejections, and None for
 
 paul@936    192 
        invalid requests.
 
 paul@936    193 
        """
 
 paul@936    194 
 
 paul@1058    195 
        return apply_scheduling_functions(self)
 
 paul@936    196 
 
 paul@1039    197 
    def confirm_scheduling(self):
 
 paul@1039    198 
 
 paul@1039    199 
        "Confirm that this event has been scheduled."
 
 paul@1039    200 
 
 paul@1058    201 
        confirm_scheduling(self)
 
 paul@1039    202 
 
 paul@1040    203 
    def finish_scheduling(self):
 
 paul@1040    204 
 
 paul@1040    205 
        "Finish the scheduling, unlocking resources where appropriate."
 
 paul@1040    206 
 
 paul@1058    207 
        finish_scheduling(self)
 
 paul@1040    208 
 
 paul@1039    209 
    def retract_scheduling(self):
 
 paul@1039    210 
 
 paul@1039    211 
        "Retract this event from scheduling records."
 
 paul@1039    212 
 
 paul@1058    213 
        retract_scheduling(self)
 
 paul@1039    214 
 
 paul@131    215 
class Event(ResourceHandler):
 
 paul@48    216 
 
 paul@48    217 
    "An event handler."
 
 paul@48    218 
 
 paul@48    219 
    def add(self):
 
 paul@676    220 
 
 paul@676    221 
        "Add a new occurrence to an existing event."
 
 paul@676    222 
 
 paul@937    223 
        self._process(self._add_for_attendee)
 
 paul@48    224 
 
 paul@48    225 
    def cancel(self):
 
 paul@131    226 
 
 paul@131    227 
        "Cancel attendance for attendees."
 
 paul@131    228 
 
 paul@937    229 
        self._process(self._cancel_for_attendee)
 
 paul@48    230 
 
 paul@48    231 
    def counter(self):
 
 paul@48    232 
 
 paul@48    233 
        "Since this handler does not send requests, it will not handle replies."
 
 paul@48    234 
 
 paul@48    235 
        pass
 
 paul@48    236 
 
 paul@48    237 
    def declinecounter(self):
 
 paul@48    238 
 
 paul@710    239 
        "Revoke any counter-proposal."
 
 paul@48    240 
 
 paul@937    241 
        self._process(self._revoke_for_attendee)
 
 paul@48    242 
 
 paul@48    243 
    def publish(self):
 
 paul@676    244 
 
 paul@676    245 
        """
 
 paul@676    246 
        Resources only consider events sent as requests, not generally published
 
 paul@676    247 
        events.
 
 paul@676    248 
        """
 
 paul@676    249 
 
 paul@48    250 
        pass
 
 paul@48    251 
 
 paul@48    252 
    def refresh(self):
 
 paul@626    253 
 
 paul@626    254 
        """
 
 paul@626    255 
        Refresh messages are typically sent to event organisers, but resources
 
 paul@626    256 
        do not act as organisers themselves.
 
 paul@626    257 
        """
 
 paul@48    258 
 
 paul@676    259 
        pass
 
 paul@676    260 
 
 paul@48    261 
    def reply(self):
 
 paul@48    262 
 
 paul@48    263 
        "Since this handler does not send requests, it will not handle replies."
 
 paul@48    264 
 
 paul@48    265 
        pass
 
 paul@48    266 
 
 paul@48    267 
    def request(self):
 
 paul@48    268 
 
 paul@48    269 
        """
 
 paul@48    270 
        Respond to a request by preparing a reply containing accept/decline
 
 paul@468    271 
        information for the recipient.
 
 paul@48    272 
 
 paul@48    273 
        No support for countering requests is implemented.
 
 paul@48    274 
        """
 
 paul@48    275 
 
 paul@937    276 
        self._process(self._schedule_for_attendee)
 
 paul@48    277 
 
 paul@725    278 
class Freebusy(CommonFreebusy, Handler):
 
 paul@48    279 
 
 paul@48    280 
    "A free/busy handler."
 
 paul@48    281 
 
 paul@48    282 
    def publish(self):
 
 paul@676    283 
 
 paul@676    284 
        "Resources ignore generally published free/busy information."
 
 paul@676    285 
 
 paul@943    286 
        self._record_freebusy(from_organiser=True)
 
 paul@48    287 
 
 paul@48    288 
    def reply(self):
 
 paul@48    289 
 
 paul@48    290 
        "Since this handler does not send requests, it will not handle replies."
 
 paul@48    291 
 
 paul@48    292 
        pass
 
 paul@48    293 
 
 paul@108    294 
    # request provided by CommonFreeBusy.request
 
 paul@48    295 
 
 paul@48    296 
# Handler registry.
 
 paul@48    297 
 
 paul@48    298 
handlers = [
 
 paul@48    299 
    ("VFREEBUSY",   Freebusy),
 
 paul@48    300 
    ("VEVENT",      Event),
 
 paul@48    301 
    ]
 
 paul@48    302 
 
 paul@48    303 
# vim: tabstop=4 expandtab shiftwidth=4