1 #!/usr/bin/env python 2 3 """ 4 Handlers for a resource. 5 6 Copyright (C) 2014, 2015 Paul Boddie <paul@boddie.org.uk> 7 8 This program is free software; you can redistribute it and/or modify it under 9 the terms of the GNU General Public License as published by the Free Software 10 Foundation; either version 3 of the License, or (at your option) any later 11 version. 12 13 This program is distributed in the hope that it will be useful, but WITHOUT 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 15 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more 16 details. 17 18 You should have received a copy of the GNU General Public License along with 19 this program. If not, see <http://www.gnu.org/licenses/>. 20 """ 21 22 from imiptools.content import Handler 23 from imiptools.data import get_address, get_uri, get_window_end, to_part 24 from imiptools.dates import get_default_timezone 25 from imiptools.handlers.common import CommonFreebusy 26 from imiptools.period import remove_affected_period 27 28 class ResourceHandler(Handler): 29 30 "Handling mechanisms specific to resources." 31 32 def _record_and_respond(self, handle_for_attendee): 33 34 oa = self.require_organiser_and_attendees() 35 if not oa: 36 return None 37 38 organiser_item, attendees = oa 39 40 # Process each attendee separately. 41 42 calendar = [] 43 44 for attendee, attendee_attr in attendees.items(): 45 46 # Check for event using UID. 47 48 if not self.have_new_object(attendee): 49 continue 50 51 # Collect response objects produced when handling the request. 52 53 response = handle_for_attendee(attendee, attendee_attr) 54 if response: 55 calendar.append(response) 56 57 return calendar 58 59 def _schedule_for_attendee(self, attendee, attendee_attr): 60 61 # Interpretation of periods can depend on the time zone. 62 63 tzid = self.get_tzid(attendee) 64 65 # If newer than any old version, discard old details from the 66 # free/busy record and check for suitability. 67 68 periods = self.obj.get_periods_for_freebusy(tzid, get_window_end(tzid)) 69 freebusy = self.store.get_freebusy(attendee) 70 scheduled = self.can_schedule(freebusy, periods) 71 72 attendee_attr["PARTSTAT"] = scheduled and "ACCEPTED" or "DECLINED" 73 if attendee_attr.has_key("RSVP"): 74 del attendee_attr["RSVP"] 75 if self.messenger and self.messenger.sender != get_address(attendee): 76 attendee_attr["SENT-BY"] = get_uri(self.messenger.sender) 77 78 # Make a version of the request with just this attendee. 79 80 self.obj["ATTENDEE"] = [(attendee, attendee_attr)] 81 82 # Update the DTSTAMP. 83 84 self.update_dtstamp() 85 86 # Set the complete event or an additional occurrence. 87 88 event = self.obj.to_node() 89 self.store.set_event(attendee, self.uid, self.recurrenceid, event) 90 91 # Remove additional recurrences if handling a complete event. 92 93 if not self.recurrenceid: 94 self.store.remove_recurrences(attendee, self.uid) 95 96 # Only update free/busy details if the event is scheduled. 97 98 if scheduled: 99 self.update_freebusy(freebusy, periods) 100 else: 101 self.remove_from_freebusy(freebusy) 102 103 # Remove either original recurrence or additional recurrence 104 # details depending on whether an additional recurrence or a 105 # complete event are being handled, respectively. 106 107 self.remove_freebusy_for_recurrences(freebusy) 108 self.store.set_freebusy(attendee, freebusy) 109 110 if self.publisher: 111 self.publisher.set_freebusy(attendee, freebusy) 112 113 return event 114 115 def _cancel_for_attendee(self, attendee, attendee_attr): 116 117 self.store.cancel_event(attendee, self.uid, self.recurrenceid) 118 119 freebusy = self.store.get_freebusy(attendee) 120 self.remove_from_freebusy(freebusy) 121 122 self.store.set_freebusy(attendee, freebusy) 123 124 if self.publisher: 125 self.publisher.set_freebusy(attendee, freebusy) 126 127 return None 128 129 class Event(ResourceHandler): 130 131 "An event handler." 132 133 def add(self): 134 pass 135 136 def cancel(self): 137 138 "Cancel attendance for attendees." 139 140 self._record_and_respond(self._cancel_for_attendee) 141 142 def counter(self): 143 144 "Since this handler does not send requests, it will not handle replies." 145 146 pass 147 148 def declinecounter(self): 149 150 """ 151 Since this handler does not send counter proposals, it will not handle 152 replies to such proposals. 153 """ 154 155 pass 156 157 def publish(self): 158 pass 159 160 def refresh(self): 161 pass 162 163 def reply(self): 164 165 "Since this handler does not send requests, it will not handle replies." 166 167 pass 168 169 def request(self): 170 171 """ 172 Respond to a request by preparing a reply containing accept/decline 173 information for each indicated attendee. 174 175 No support for countering requests is implemented. 176 """ 177 178 response = self._record_and_respond(self._schedule_for_attendee) 179 if response: 180 self.add_result("REPLY", map(get_address, self.obj.get_values("ORGANIZER")), to_part("REPLY", response)) 181 182 class Freebusy(Handler, CommonFreebusy): 183 184 "A free/busy handler." 185 186 def publish(self): 187 pass 188 189 def reply(self): 190 191 "Since this handler does not send requests, it will not handle replies." 192 193 pass 194 195 # request provided by CommonFreeBusy.request 196 197 # Handler registry. 198 199 handlers = [ 200 ("VFREEBUSY", Freebusy), 201 ("VEVENT", Event), 202 ] 203 204 # vim: tabstop=4 expandtab shiftwidth=4