1 #!/usr/bin/env python 2 3 """ 4 Common calendar client utilities. 5 6 Copyright (C) 2014, 2015, 2016, 2017 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 collections import OrderedDict 23 from datetime import datetime, timedelta 24 from imiptools.config import settings 25 from imiptools.data import check_delegation, get_address, \ 26 get_recurrence_periods, \ 27 get_sender_identities, get_uri, \ 28 get_window_end, is_new_object, make_freebusy, \ 29 make_uid, new_object, to_part, \ 30 update_attendees_with_delegates, \ 31 uri_dict, uri_parts, uri_values 32 from imiptools.dates import check_permitted_values, format_datetime, \ 33 get_datetime, get_default_timezone, \ 34 get_duration, get_time, get_timestamp, \ 35 to_datetime 36 from imiptools.i18n import get_translator 37 from imiptools.freebusy import SupportAttendee, SupportExpires 38 from imiptools.profile import Preferences 39 from imiptools.stores import get_store, get_publisher, get_journal 40 41 class Client: 42 43 "Common handler and manager methods." 44 45 default_window_size = 100 46 organiser_methods = "ADD", "CANCEL", "DECLINECOUNTER", "PUBLISH", "REQUEST" 47 48 def __init__(self, user, messenger=None, store=None, publisher=None, journal=None, 49 preferences_dir=None): 50 51 """ 52 Initialise a calendar client with the current 'user', plus any 53 'messenger', 'store', 'publisher' and 'journal' objects, indicating any 54 specific 'preferences_dir'. 55 """ 56 57 self.user = user 58 self.messenger = messenger 59 60 # The store is mandatory and will be initialised using defaults if not 61 # provided. 62 63 self.store = store or get_store() 64 65 # Journal and publisher objects are optional. 66 67 self.journal = journal 68 self.publisher = publisher 69 self.preferences_dir = preferences_dir 70 self.preferences = None 71 72 # Localise the messenger. 73 74 if self.messenger: 75 self.messenger.gettext = self.get_translator() 76 77 def get_store(self): 78 return self.store 79 80 def get_publisher(self): 81 return self.publisher 82 83 def get_journal(self): 84 return self.journal 85 86 # Store-related methods. 87 88 def acquire_lock(self): 89 self.store.acquire_lock(self.user) 90 91 def release_lock(self): 92 self.store.release_lock(self.user) 93 94 # Preferences-related methods. 95 96 def get_preferences(self): 97 if not self.preferences and self.user: 98 self.preferences = Preferences(self.user, self.preferences_dir) 99 return self.preferences 100 101 def get_locale(self): 102 prefs = self.get_preferences() 103 return prefs and prefs.get("LANG", "en", True) or "en" 104 105 def get_translator(self): 106 return get_translator([self.get_locale()]) 107 108 def get_user_attributes(self): 109 prefs = self.get_preferences() 110 return prefs and prefs.get_all(["CN"]) or {} 111 112 def get_tzid(self): 113 prefs = self.get_preferences() 114 return prefs and prefs.get("TZID") or get_default_timezone() 115 116 def get_window_size(self): 117 118 "Return the period window size as an integer." 119 120 prefs = self.get_preferences() 121 try: 122 return prefs and int(prefs.get("window_size")) or self.default_window_size 123 except (TypeError, ValueError): 124 return self.default_window_size 125 126 def get_window_start(self): 127 128 "Return the period window start as a datetime." 129 130 prefs = self.get_preferences() 131 tzid = self.get_tzid() 132 start = prefs and get_datetime(prefs.get("window_start"), {"TZID" : tzid}) 133 return isinstance(start, datetime) and start or start and to_datetime(start, tzid) 134 135 def get_window_end(self, size=None, start=None): 136 137 "Return the period window end as a datetime." 138 139 tzid = self.get_tzid() 140 return get_window_end(tzid, size or self.get_window_size(), 141 start or self.get_window_start()) 142 143 def is_participating(self): 144 145 "Return participation in the calendar system." 146 147 prefs = self.get_preferences() 148 return prefs and prefs.get("participating", settings["PARTICIPATING_DEFAULT"]) != "no" or False 149 150 def is_sharing(self): 151 152 "Return whether free/busy information is being generally shared." 153 154 prefs = self.get_preferences() 155 return prefs and prefs.get("freebusy_sharing", settings["SHARING_DEFAULT"]) == "share" or False 156 157 def is_bundling(self): 158 159 "Return whether free/busy information is being bundled in messages." 160 161 prefs = self.get_preferences() 162 return prefs and prefs.get("freebusy_bundling", settings["BUNDLING_DEFAULT"]) == "always" or False 163 164 def is_notifying(self): 165 166 "Return whether recipients are notified about free/busy payloads." 167 168 prefs = self.get_preferences() 169 return prefs and prefs.get("freebusy_messages", settings["NOTIFYING_DEFAULT"]) == "notify" or False 170 171 def is_publishing(self): 172 173 "Return whether free/busy information is being published as Web resources." 174 175 prefs = self.get_preferences() 176 return prefs and prefs.get("freebusy_publishing", settings["PUBLISHING_DEFAULT"]) == "publish" or False 177 178 def is_refreshing(self): 179 180 "Return whether a recipient supports requests to refresh event details." 181 182 prefs = self.get_preferences() 183 return prefs and prefs.get("event_refreshing", settings["REFRESHING_DEFAULT"]) == "always" or False 184 185 def allow_add(self): 186 return self.get_add_method_response() in ("add", "refresh") 187 188 def get_add_method_response(self): 189 prefs = self.get_preferences() 190 return prefs and prefs.get("add_method_response", settings["ADD_RESPONSE_DEFAULT"]) or "refresh" 191 192 def get_offer_period(self): 193 194 "Decode a specification in the iCalendar duration format." 195 196 prefs = self.get_preferences() 197 duration = prefs and prefs.get("freebusy_offers", settings["FREEBUSY_OFFER_DEFAULT"]) 198 199 # NOTE: Should probably report an error somehow if None. 200 201 return duration and get_duration(duration) or None 202 203 def get_organiser_replacement(self): 204 prefs = self.get_preferences() 205 return prefs and prefs.get("organiser_replacement", settings["ORGANISER_REPLACEMENT_DEFAULT"]) or "attendee" 206 207 def have_manager(self): 208 return settings["MANAGER_INTERFACE"] 209 210 def get_permitted_values(self): 211 212 """ 213 Decode a specification of one of the following forms... 214 215 <minute values> 216 <hour values>:<minute values> 217 <hour values>:<minute values>:<second values> 218 219 ...with each list of values being comma-separated. 220 """ 221 222 prefs = self.get_preferences() 223 permitted_values = prefs and prefs.get("permitted_times") 224 if permitted_values: 225 try: 226 l = [] 227 for component in permitted_values.split(":")[:3]: 228 if component: 229 l.append(map(int, component.split(","))) 230 else: 231 l.append(None) 232 233 # NOTE: Should probably report an error somehow. 234 235 except ValueError: 236 return None 237 else: 238 l = (len(l) < 2 and [None] or []) + l + (len(l) < 3 and [None] or []) 239 return l 240 else: 241 return None 242 243 # Common operations on calendar data. 244 245 def update_sender_attr(self, attr): 246 247 "Update the SENT-BY attribute of the 'attr' sender metadata." 248 249 if self.messenger: 250 if self.messenger.sender != get_address(self.user): 251 attr["SENT-BY"] = get_uri(self.messenger.sender) 252 elif attr.has_key("SENT-BY"): 253 del attr["SENT-BY"] 254 255 def get_periods(self, obj, explicit_only=False, future_only=False): 256 257 """ 258 Return periods for the given 'obj'. 259 260 If 'explicit_only' is set to a true value, only explicit periods will be 261 returned, not rule-based periods. 262 263 If 'future_only' is set to a true value, only future periods will be 264 returned, not all periods defined by an event starting in the past. 265 """ 266 267 return obj.get_periods( 268 start=(future_only and self.get_window_start() or None), 269 end=(not explicit_only and self.get_window_end() or None)) 270 271 def get_updated_periods(self, obj, explicit_only=False, future_only=False): 272 273 """ 274 Return the periods provided by 'obj' and associated recurrence 275 instances. Each original period is returned in a tuple with a 276 corresponding updated period which may be the same or which may be None 277 if the period is cancelled. A list of these tuples is returned. 278 279 If 'explicit_only' is set to a true value, only explicit periods will be 280 returned, not rule-based periods. 281 282 If 'future_only' is set to a true value, only future periods will be 283 returned, not all periods defined by an event starting in the past. 284 """ 285 286 self.store.update_event_from_recurrences(self.user, obj) 287 288 return obj.get_updated_periods( 289 start=(future_only and self.get_window_start() or None), 290 end=(not explicit_only and self.get_window_end() or None)) 291 292 # Store operations. 293 294 def get_stored_object(self, uid, recurrenceid, section=None, username=None): 295 296 """ 297 Return the stored object for the current user, with the given 'uid' and 298 'recurrenceid' from the given 'section' and for the given 'username' (if 299 specified), or from the standard object collection otherwise. 300 """ 301 302 if section == "counters": 303 obj = self.store.get_counter(self.user, username, uid, recurrenceid) 304 else: 305 obj = self.store.get_event(self.user, uid, recurrenceid, section) 306 307 # Set the fallback time zone. 308 309 if obj: 310 obj.set_tzid(self.get_tzid()) 311 312 return obj 313 314 # Free/busy operations. 315 316 def get_freebusy_part(self, freebusy=None): 317 318 """ 319 Return a message part containing free/busy information for the user, 320 either specified as 'freebusy' or obtained from the store directly. 321 """ 322 323 if self.is_sharing() and self.is_bundling(): 324 325 # Invent a unique identifier. 326 327 uid = make_uid(self.user) 328 329 freebusy = freebusy or self.store.get_freebusy(self.user) 330 331 user_attr = {} 332 self.update_sender_attr(user_attr) 333 return self.to_part("PUBLISH", [make_freebusy(freebusy, uid, self.user, user_attr)]) 334 335 return None 336 337 def update_freebusy(self, freebusy, periods, transp, uid, recurrenceid, summary, organiser, expires=None): 338 339 """ 340 Update the 'freebusy' collection with the given 'periods', indicating a 341 'transp' status, explicit 'uid' and 'recurrenceid' to indicate either a 342 recurrence or the parent event. The 'summary' and 'organiser' must also 343 be provided. 344 345 An optional 'expires' datetime string can be provided to tag a free/busy 346 offer. 347 """ 348 349 # Add specific attendee information for certain collections. 350 351 if isinstance(freebusy, SupportAttendee): 352 freebusy.update_freebusy(periods, transp, uid, recurrenceid, summary, organiser, self.user) 353 354 # Add expiry datetime for certain collections. 355 356 elif isinstance(freebusy, SupportExpires): 357 freebusy.update_freebusy(periods, transp, uid, recurrenceid, summary, organiser, expires) 358 359 # Provide only the essential attributes for other collections. 360 361 else: 362 freebusy.update_freebusy(periods, transp, uid, recurrenceid, summary, organiser) 363 364 # Preparation of content. 365 366 def to_part(self, method, fragments): 367 368 "Return an encoded MIME part for the given 'method' and 'fragments'." 369 370 return to_part(method, fragments, line_length=settings["CALENDAR_LINE_LENGTH"]) 371 372 def object_to_part(self, method, obj): 373 374 "Return an encoded MIME part for the given 'method' and 'obj'." 375 376 return obj.to_part(method, line_length=settings["CALENDAR_LINE_LENGTH"]) 377 378 # Preparation of messages communicating the state of events. 379 380 def get_message_parts(self, obj, method, attendee=None): 381 382 """ 383 Return a tuple containing a list of methods and a list of message parts, 384 with the parts collectively describing the given object 'obj' and its 385 recurrences, using 'method' as the means of publishing details (with 386 CANCEL being used to retract or remove details). 387 388 If 'attendee' is indicated, the attendee's participation will be taken 389 into account when generating the description. 390 """ 391 392 # Assume that the outcome will be composed of requests and 393 # cancellations. It would not seem completely bizarre to produce 394 # publishing messages if a refresh message was unprovoked. 395 396 responses = [] 397 methods = set() 398 399 # Get the parent event, add SENT-BY details to the organiser. 400 401 if not attendee or self.is_participating(attendee, obj=obj): 402 self.update_sender(obj) 403 responses.append(self.object_to_part(method, obj)) 404 methods.add(method) 405 406 # Get recurrences for parent events. 407 408 if not self.recurrenceid: 409 410 # Collect active and cancelled recurrences. 411 412 for rl, section, rmethod in [ 413 (self.store.get_active_recurrences(self.user, self.uid), None, method), 414 (self.store.get_cancelled_recurrences(self.user, self.uid), "cancellations", "CANCEL"), 415 ]: 416 417 for recurrenceid in rl: 418 419 # Get the recurrence, add SENT-BY details to the organiser. 420 421 obj = self.get_stored_object(self.uid, recurrenceid, section) 422 423 if not attendee or self.is_participating(attendee, obj=obj): 424 self.update_sender(obj) 425 responses.append(self.object_to_part(rmethod, obj)) 426 methods.add(rmethod) 427 428 return methods, responses 429 430 class ClientForObject(Client): 431 432 "A client maintaining a specific object." 433 434 def __init__(self, obj, user, messenger=None, store=None, publisher=None, 435 journal=None, preferences_dir=None): 436 Client.__init__(self, user, messenger, store, publisher, journal, preferences_dir) 437 self.set_object(obj) 438 439 def set_object(self, obj): 440 441 "Set the current object to 'obj', obtaining metadata details." 442 443 self.obj = obj 444 self.uid = obj and self.obj.get_uid() 445 self.recurrenceid = obj and self.obj.get_recurrenceid() 446 self.sequence = obj and self.obj.get_value("SEQUENCE") 447 self.dtstamp = obj and self.obj.get_value("DTSTAMP") 448 449 # Set the fallback time zone. 450 451 if obj: 452 self.obj.set_tzid(self.get_tzid()) 453 454 def new_object(self, objtype): 455 456 "Initialise a new object for the client with the given 'objtype'." 457 458 self.set_object(new_object(objtype, self.user, self.get_user_attributes(), self.get_tzid())) 459 return self.obj 460 461 def load_object(self, uid, recurrenceid): 462 463 "Load the object with the given 'uid' and 'recurrenceid'." 464 465 self.set_object(self.get_stored_object(uid, recurrenceid)) 466 return self.obj 467 468 def set_identity(self, method): 469 470 """ 471 Set the current user for the current object in the context of the given 472 'method'. It is usually set when initialising the handler, using the 473 recipient details, but outgoing messages do not reference the recipient 474 in this way. 475 """ 476 477 pass 478 479 def is_usable(self, method=None): 480 481 "Return whether the current object is usable with the given 'method'." 482 483 return True 484 485 def is_attendee(self): 486 487 "Return whether the current user is an attendee in the current object." 488 489 return self.obj.get_value_map("ATTENDEE").has_key(self.user) 490 491 def is_organiser(self): 492 493 """ 494 Return whether the current user is the organiser in the current object. 495 """ 496 497 return self.obj.get_uri("ORGANIZER") == self.user 498 499 def is_recurrence(self): 500 501 "Return whether the current object is a recurrence of its parent." 502 503 parent = self.get_parent_object() 504 return parent and parent.has_recurrence(self.obj.get_recurrenceid()) 505 506 def get_recurrences(self, uid=None): 507 508 "Return the current object's recurrence identifiers." 509 510 return self.store.get_recurrences(self.user, uid or self.uid) 511 512 def get_periods(self, obj=None, explicit_only=False, future_only=False): 513 514 "Return the periods provided by the current object." 515 516 return Client.get_periods(self, obj or self.obj, explicit_only, future_only) 517 518 def get_updated_periods(self, obj=None): 519 520 """ 521 Return the periods provided by the current object and associated 522 recurrence instances. 523 """ 524 525 return Client.get_updated_periods(self, obj or self.obj) 526 527 # Common operations on calendar data. 528 529 def update_sender(self, obj=None): 530 531 """ 532 Update sender details in 'obj', or the current object if not indicated, 533 modifying the organiser attributes. 534 """ 535 536 obj = obj or self.obj 537 organiser, organiser_attr = obj.get_uri_item("ORGANIZER") 538 self.update_sender_attr(organiser_attr) 539 540 def update_senders(self, obj=None): 541 542 """ 543 Update sender details in 'obj', or the current object if not indicated, 544 removing SENT-BY attributes for attendees other than the current user if 545 those attributes give the URI of the calendar system. 546 """ 547 548 obj = obj or self.obj 549 calendar_uri = self.messenger and get_uri(self.messenger.sender) 550 551 for attendee, attendee_attr in obj.get_uri_items("ATTENDEE") or []: 552 553 # Fix up the SENT-BY attribute for this user. 554 555 if attendee == self.user: 556 self.update_sender_attr(attendee_attr) 557 558 # Remove any conflicting SENT-BY attributes for other users. 559 560 elif attendee_attr.get("SENT-BY") == calendar_uri: 561 del attendee_attr["SENT-BY"] 562 563 def get_sending_attendee(self): 564 565 "Return the attendee who sent the current object." 566 567 # Search for the sender of the message or the calendar system address. 568 569 senders = set(uri_values(self.senders or self.messenger and [self.messenger.sender] or [])) 570 571 if senders: 572 573 # Obtain a mapping from sender URI to attendee URI, where the sender 574 # is taken from the SENT-BY attribute if present, or from the 575 # attendee value otherwise. 576 577 sent_by = get_sender_identities(self.obj.get_uri_map("ATTENDEE")) 578 579 # Obtain the attendee for the first sender matching the SENT-BY or 580 # attendee value. 581 582 for sender in senders.intersection(sent_by.keys()): 583 return sent_by[sender][0] 584 585 return None 586 587 # Object update methods. 588 589 def update_recurrenceid(self): 590 591 """ 592 Update the RECURRENCE-ID in the current object, initialising it from 593 DTSTART. 594 """ 595 596 self.obj["RECURRENCE-ID"] = [self.obj.get_item("DTSTART")] 597 self.recurrenceid = self.obj.get_recurrenceid() 598 599 def update_dtstamp(self, obj=None): 600 601 "Update the DTSTAMP in the current object or any given object 'obj'." 602 603 obj = obj or self.obj 604 self.dtstamp = obj.update_dtstamp() 605 606 def update_sequence(self, obj=None): 607 608 "Update the SEQUENCE in the current object or any given object 'obj'." 609 610 obj = obj or self.obj 611 obj.update_sequence(self.is_organiser()) 612 613 def merge_attendance(self, attendees): 614 615 """ 616 Merge attendance from the current object's 'attendees' into the version 617 stored for the current user. 618 """ 619 620 obj = self.get_stored_object_version() 621 622 if not obj or not self.have_new_object(): 623 return False 624 625 # Get attendee details in a usable form. 626 627 stored_attendees = obj.get_uri_map("ATTENDEE") 628 629 for attendee, attendee_attr in attendees.items(): 630 631 # Update attendance in the loaded object for any recognised 632 # attendees. 633 634 if stored_attendees.has_key(attendee): 635 stored_attendees[attendee] = attendee_attr 636 637 update_attendees_with_delegates(stored_attendees, attendees) 638 639 # Set the new details and store the object. 640 641 obj["ATTENDEE"] = stored_attendees.items() 642 643 # Set a specific recurrence or the complete event if not an additional 644 # occurrence. 645 646 return self.store.set_event(self.user, self.uid, self.recurrenceid, obj.to_node()) 647 648 def update_attendees(self, to_invite, to_cancel, to_modify): 649 650 """ 651 Update the attendees in the current object with the given 'to_invite', 652 'to_cancel' and 'to_modify' attendee mappings. 653 """ 654 655 attendees = self.obj.get_uri_items("ATTENDEE") or [] 656 attendee_map = OrderedDict(attendees) 657 658 # Normalise the identities. 659 660 to_invite = uri_dict(to_invite) 661 to_cancel = uri_dict(to_cancel) 662 to_modify = uri_dict(to_modify) 663 664 if self.is_organiser(): 665 666 # Remove uninvited attendees. 667 668 for attendee in to_cancel.keys(): 669 if attendee_map.has_key(attendee): 670 del attendee_map[attendee] 671 672 # Attendees (when countering) must only include the current user and 673 # any added attendees. 674 675 else: 676 attr = attendee_map.get(self.user) or self.get_user_attributes() 677 attendee_map = {self.user : attr} 678 679 # Update modified attendees. 680 681 for attendee, attr in to_modify.items(): 682 existing_attr = attendee_map.get(attendee) 683 if existing_attr: 684 existing_attr.update(attr) 685 686 # Add newly-invited attendees, applicable for organisers and attendees 687 # (when countering). 688 689 for attendee, attr in to_invite.items(): 690 if not attendee_map.has_key(attendee): 691 692 # Only the organiser can reset the participation attributes. 693 694 if self.is_organiser() and attendee != self.user: 695 attr.update({"PARTSTAT" : "NEEDS-ACTION", "RSVP" : "TRUE"}) 696 697 attendee_map[attendee] = attr 698 699 self.obj["ATTENDEE"] = attendee_map.items() 700 701 def update_participation(self, partstat=None): 702 703 """ 704 Update the participation in the current object of the user with the 705 given 'partstat'. 706 """ 707 708 attendee_attr = self.obj.get_uri_map("ATTENDEE").get(self.user) 709 710 if not attendee_attr: 711 return None 712 713 # Set the participation and remove any request for response indicator. 714 715 if partstat: 716 attendee_attr["PARTSTAT"] = partstat 717 if attendee_attr.has_key("RSVP"): 718 del attendee_attr["RSVP"] 719 720 return attendee_attr 721 722 def update_event_version(self, changed=False): 723 724 """ 725 Update the event version information and details for sending. Where 726 'changed' is set to a true value for the attendee, the attendee list 727 will be processed and preserved; otherwise, the attendee replying will 728 be retained and the others removed from the object. 729 """ 730 731 if self.is_organiser(): 732 self.update_sender() 733 734 # Process attendee SENT-BY usage, timestamp and sequence details 735 # appropriately for the sender's role. 736 737 self.update_senders() 738 self.update_dtstamp() 739 self.update_sequence() 740 741 return True 742 743 def update_event_from_periods(self, to_set, to_exclude): 744 745 """ 746 Set the periods in any redefined event from the 'to_set' list, excluding 747 the main period if it appears in 'to_exclude'. 748 """ 749 750 if to_set: 751 self.obj.set_periods(to_set) 752 753 if to_exclude: 754 self.obj.update_exceptions(to_exclude, to_set or []) 755 756 # General message generation methods. 757 758 def get_recipients(self, obj=None): 759 760 """ 761 Return recipients for 'obj' (or the current object) dependent on the 762 current user's role. 763 """ 764 765 obj = obj or self.obj 766 767 organiser = obj.get_uri("ORGANIZER") 768 attendees = obj.get_uri_values("ATTENDEE") 769 770 # As organiser, send an invitation to attendees, excluding oneself if 771 # also attending. The updated event will be saved by the outgoing 772 # handler. 773 774 if self.is_organiser(): 775 return [get_address(attendee) for attendee in attendees if attendee != self.user] 776 else: 777 return [get_address(organiser)] 778 779 def attach_freebusy(self, parts): 780 781 """ 782 Since the outgoing handler updates this user's free/busy details, the 783 stored details will probably not have the updated details straight away, 784 so we update our copy for serialisation as the bundled free/busy object. 785 """ 786 787 freebusy = self.store.get_freebusy(self.user).copy() 788 self.update_freebusy(freebusy, self.user, self.is_organiser()) 789 790 # Bundle free/busy information if appropriate. 791 792 part = self.get_freebusy_part(freebusy) 793 if part: 794 parts.append(part) 795 796 def make_message(self, parts, recipients, bcc_sender=False): 797 798 """ 799 Send the given 'parts' to the appropriate 'recipients', also sending a 800 copy to the sender. 801 """ 802 803 if not self.messenger: 804 return None 805 806 # Update and attach bundled free/busy details. 807 808 self.attach_freebusy(parts) 809 810 if not bcc_sender: 811 return self.messenger.make_outgoing_message(parts, recipients) 812 else: 813 sender = get_address(self.user) 814 return self.messenger.make_outgoing_message(parts, recipients, outgoing_bcc=sender) 815 816 def send_message(self, message, recipients, bcc_sender=False): 817 818 """ 819 Send 'message' to 'recipients', explicitly specifying the sender as an 820 outgoing BCC recipient if 'bcc_sender' is set, since the generic 821 calendar user will be the actual sender. 822 """ 823 824 if not recipients and not bcc_sender or not self.messenger: 825 return 826 827 if not bcc_sender: 828 self.messenger.sendmail(recipients, message.as_string()) 829 else: 830 sender = get_address(self.user) 831 self.messenger.sendmail(recipients, message.as_string(), outgoing_bcc=sender) 832 833 def make_message_for_self(self, parts): 834 835 "Send 'message' to the current user." 836 837 if not self.messenger: 838 return None 839 840 sender = get_address(self.user) 841 return self.messenger.make_outgoing_message(parts, [sender]) 842 843 def send_message_to_self(self, message): 844 845 "Send 'message' to the current user." 846 847 if not self.messenger: 848 return 849 850 sender = get_address(self.user) 851 self.messenger.sendmail([sender], message.as_string()) 852 853 # Specific message generation methods. 854 855 def get_rescheduled_objects(self, periods): 856 857 "Return objects describing rescheduled 'periods'." 858 859 objects = [] 860 861 if periods: 862 863 # For new recurrences, duplicate the core of the object without any 864 # period information. 865 866 template = self.obj.copy() 867 template.remove_all(["RRULE", "RDATE", "DTSTART", "DTEND", "DURATION"]) 868 869 # Process each period, attempting to update existing recurrences or 870 # creating new ones. 871 872 for p in periods: 873 if not p.origin: 874 continue 875 876 # Attempt to find an existing recurrence. 877 878 obj = self.get_stored_object(self.uid, p.get_recurrenceid()) 879 if not obj: 880 obj = template.copy() 881 882 # Acquire the original recurrence identifier associated with 883 # this period. This may differ where the start of the period 884 # has changed. 885 886 dt, attr = p.get_recurrenceid_item() 887 obj["RECURRENCE-ID"] = [(format_datetime(dt), attr)] 888 889 # Set specific recurrence information. 890 891 obj.set_datetime("DTSTART", p.get_start()) 892 obj.set_datetime("DTEND", p.get_end()) 893 894 objects.append(obj) 895 896 return objects 897 898 def get_rescheduled_parts(self, periods, method): 899 900 """ 901 Return message parts describing rescheduled 'periods' affected by 'method'. 902 """ 903 904 rescheduled_parts = [] 905 906 for obj in self.get_rescheduled_objects(periods): 907 rescheduled_parts.append(self.object_to_part(method, obj)) 908 909 return rescheduled_parts 910 911 def make_update_message(self, recipients, update_parent=False, 912 to_unschedule=None, to_reschedule=None, 913 all_unscheduled=None, all_rescheduled=None, 914 to_add=None): 915 916 """ 917 Prepare event updates from the organiser of an event for the given 918 'recipients', including the parent event if 'update_parent' is set to a 919 true value. 920 921 Additional parts are provided by the 'to_unschedule' and 'to_reschedule' 922 collections. Alternatively, where the parent event is being updated, the 923 'all_unscheduled' and 'all_rescheduled' period collections are included. 924 925 The 'to_add' period collection augments the existing periods. 926 """ 927 928 parts = [] 929 930 if update_parent: 931 parts.append(self.object_to_part("REQUEST", self.obj)) 932 unscheduled = all_unscheduled 933 rescheduled = all_rescheduled 934 else: 935 unscheduled = to_unschedule 936 rescheduled = to_reschedule 937 938 parts += self.get_rescheduled_parts(unscheduled, "CANCEL") 939 parts += self.get_rescheduled_parts(rescheduled, "REQUEST") 940 parts += self.get_rescheduled_parts(to_add, "ADD") 941 return self.make_message(parts, recipients) 942 943 def make_self_update_message(self, all_unscheduled=None, all_rescheduled=None, 944 to_add=None): 945 946 """ 947 Prepare event updates to be sent from the organiser of an event to 948 themself. 949 """ 950 951 parts = [self.object_to_part("PUBLISH", self.obj)] 952 parts += self.get_rescheduled_parts(all_unscheduled, "CANCEL") 953 parts += self.get_rescheduled_parts(all_rescheduled, "PUBLISH") 954 parts += self.get_rescheduled_parts(to_add, "ADD") 955 return self.make_message_for_self(parts) 956 957 def make_response_message(self, recipients, update_parent=False, 958 all_rescheduled=None, to_reschedule=None): 959 960 """ 961 Prepare a response to 'recipients', including the parent event if 962 'update_parent' is set to a true value, incorporating 'all_rescheduled' 963 periods, of which there may be indicated periods 'to_reschedule'. 964 """ 965 966 parts = [self.object_to_part(update_parent and "COUNTER" or "REPLY", self.obj)] 967 968 # Determine existing replaced periods that are not newly rescheduled. 969 970 rescheduled_unmodified = set(all_rescheduled or []).difference(to_reschedule or []) 971 972 if rescheduled_unmodified: 973 parts += self.get_rescheduled_parts(rescheduled_unmodified, update_parent and "COUNTER" or "REPLY") 974 975 # Suggest details for newly rescheduled periods. 976 977 if to_reschedule: 978 parts += self.get_rescheduled_parts(to_reschedule, "COUNTER") 979 980 return self.make_message(parts, recipients, bcc_sender=True) 981 982 def make_cancel_message(self, to_cancel=None): 983 984 """ 985 Prepare an event cancellation message involving the participants in the 986 'to_cancel' mapping or involving all participants if 'to_cancel' is not 987 specified or empty. 988 """ 989 990 obj = self.obj.copy() 991 992 if to_cancel: 993 obj["ATTENDEE"] = to_cancel.items() 994 995 recipients = self.get_recipients(obj) 996 997 parts = [self.object_to_part("CANCEL", obj)] 998 return self.make_message(parts, recipients) 999 1000 def make_cancel_message_for_self(self, obj): 1001 1002 "Prepare an event cancellation for the current user." 1003 1004 parts = [self.object_to_part("CANCEL", obj)] 1005 return self.make_message_for_self(parts) 1006 1007 # Action methods. 1008 1009 def send_declined_counter_to_attendee(self, attendee): 1010 1011 "Send a declined counter-proposal to 'attendee'." 1012 1013 # Obtain the counter-proposal for the attendee. 1014 1015 obj = self.get_stored_object(self.uid, self.recurrenceid, "counters", attendee) 1016 if not obj: 1017 return 1018 1019 self.update_senders(obj) 1020 obj.update_dtstamp() 1021 obj.update_sequence() 1022 1023 parts = [self.object_to_part("DECLINECOUNTER", obj)] 1024 1025 # Create and send the response. 1026 1027 recipients = self.get_recipients(obj) 1028 message = self.make_message(parts, recipients, bcc_sender=True) 1029 self.send_message(message, recipients, bcc_sender=True) 1030 1031 def send_response_to_organiser(self, all_rescheduled=None, to_reschedule=None, 1032 changed=False): 1033 1034 """ 1035 Send a response to the organiser describing attendance and proposed 1036 amendments to the event. 1037 1038 If 'all_rescheduled' is specified, it provides details of separate 1039 recurrence instances for which a response needs to be generated. 1040 1041 If 'to_reschedule' provides rescheduled periods, these will be sent as 1042 counter-proposals. 1043 1044 If 'changed' is set to a true value, a counter-proposal will be sent for 1045 the entire event instead of a reply. 1046 """ 1047 1048 recipients = self.get_recipients() 1049 message = self.make_response_message(recipients, all_rescheduled, 1050 to_reschedule, changed) 1051 self.send_message(message, recipients, bcc_sender=True) 1052 1053 def send_update_to_recipients(self, to_unschedule=None, to_reschedule=None): 1054 1055 """ 1056 Send cancellations for each of the recurrences 'to_unschedule' along 1057 with modifications for each of the recurrences 'to_reschedule'. 1058 """ 1059 1060 recipients = self.get_recipients() 1061 message = self.make_update_message(recipients, to_unschedule, to_reschedule) 1062 self.send_message(message, recipients) 1063 1064 def send_publish_to_self(self, all_unscheduled=None, all_rescheduled=None): 1065 1066 """ 1067 Send published event details incorporating 'all_unscheduled' and 1068 'all_rescheduled' periods. 1069 """ 1070 1071 # Since the organiser can update the SEQUENCE but this can leave any 1072 # mail/calendar client lagging, issue a PUBLISH message to the 1073 # user's address. 1074 1075 recipients = self.get_recipients() 1076 message = self.make_self_update_message(all_unscheduled, all_rescheduled) 1077 self.send_message_to_self(message) 1078 1079 def send_cancel_to_recipients(self, to_cancel=None): 1080 1081 "Send a cancellation to all uninvited attendees in 'to_cancel'." 1082 1083 message = self.make_cancel_message(to_cancel) 1084 self.send_message(message, to_cancel.keys()) 1085 1086 def send_cancel_to_self(self): 1087 1088 "Issue a CANCEL message to the user's address." 1089 1090 message = self.make_cancel_message_for_self(self.obj) 1091 self.send_message_to_self(message) 1092 1093 # Object-related tests. 1094 1095 def is_recognised_organiser(self, organiser): 1096 1097 """ 1098 Return whether the given 'organiser' is recognised from 1099 previously-received details. If no stored details exist, True is 1100 returned. 1101 """ 1102 1103 obj = self.get_stored_object_version() 1104 if obj: 1105 stored_organiser = obj.get_uri("ORGANIZER") 1106 return stored_organiser == organiser 1107 else: 1108 return True 1109 1110 def is_recognised_attendee(self, attendee): 1111 1112 """ 1113 Return whether the given 'attendee' is recognised from 1114 previously-received details. If no stored details exist, True is 1115 returned. 1116 """ 1117 1118 obj = self.get_stored_object_version() 1119 if obj: 1120 stored_attendees = obj.get_uri_map("ATTENDEE") 1121 return stored_attendees.has_key(attendee) 1122 else: 1123 return True 1124 1125 def get_attendance(self, user=None, obj=None): 1126 1127 """ 1128 Return the attendance attributes for 'user', or the current user if 1129 'user' is not specified. 1130 """ 1131 1132 attendees = (obj or self.obj).get_uri_map("ATTENDEE") 1133 return attendees.get(user or self.user) 1134 1135 def is_participating(self, user, as_organiser=False, obj=None): 1136 1137 """ 1138 Return whether, subject to the 'user' indicating an identity and the 1139 'as_organiser' status of that identity, the user concerned is actually 1140 participating in the current object event. 1141 """ 1142 1143 # Use any attendee property information for an organiser, not the 1144 # organiser property attributes. 1145 1146 attr = self.get_attendance(user, obj) 1147 return as_organiser or attr is not None and not attr or \ 1148 attr and attr.get("PARTSTAT") not in ("DECLINED", "DELEGATED", "NEEDS-ACTION") 1149 1150 def has_indicated_attendance(self, user=None, obj=None): 1151 1152 """ 1153 Return whether the given 'user' (or the current user if not specified) 1154 has indicated attendance in the given 'obj' (or the current object if 1155 not specified). 1156 """ 1157 1158 attr = self.get_attendance(user, obj) 1159 return attr and attr.get("PARTSTAT") not in (None, "NEEDS-ACTION") 1160 1161 def get_overriding_transparency(self, user, as_organiser=False): 1162 1163 """ 1164 Return the overriding transparency to be associated with the free/busy 1165 records for an event, subject to the 'user' indicating an identity and 1166 the 'as_organiser' status of that identity. 1167 1168 Where an identity is only an organiser and not attending, "ORG" is 1169 returned. Otherwise, no overriding transparency is defined and None is 1170 returned. 1171 """ 1172 1173 attr = self.get_attendance(user) 1174 return as_organiser and not (attr and attr.get("PARTSTAT")) and "ORG" or None 1175 1176 def can_schedule(self, freebusy, periods): 1177 1178 """ 1179 Indicate whether within 'freebusy' the given 'periods' can be scheduled. 1180 """ 1181 1182 return freebusy.can_schedule(periods, self.uid, self.recurrenceid) 1183 1184 def have_new_object(self, strict=True): 1185 1186 """ 1187 Return whether the current object is new to the current user. 1188 1189 If 'strict' is specified and is a false value, the DTSTAMP test will be 1190 ignored. This is useful in handling responses from attendees from 1191 clients (like Claws Mail) that erase time information from DTSTAMP and 1192 make it invalid. 1193 """ 1194 1195 obj = self.get_stored_object_version() 1196 1197 # If found, compare SEQUENCE and potentially DTSTAMP. 1198 1199 if obj: 1200 sequence = obj.get_value("SEQUENCE") 1201 dtstamp = obj.get_value("DTSTAMP") 1202 1203 # If the request refers to an older version of the object, ignore 1204 # it. 1205 1206 return is_new_object(sequence, self.sequence, dtstamp, self.dtstamp, not strict) 1207 1208 return True 1209 1210 def possibly_recurring_indefinitely(self): 1211 1212 "Return whether the object recurs indefinitely." 1213 1214 # Obtain the stored object to make sure that recurrence information 1215 # is not being ignored. This might happen if a client sends a 1216 # cancellation without the complete set of properties, for instance. 1217 1218 return self.obj.possibly_recurring_indefinitely() or \ 1219 self.get_stored_object_version() and \ 1220 self.get_stored_object_version().possibly_recurring_indefinitely() 1221 1222 # Constraint application on event periods. 1223 1224 def check_object(self): 1225 1226 "Check the object against any scheduling constraints." 1227 1228 permitted_values = self.get_permitted_values() 1229 if not permitted_values: 1230 return None 1231 1232 invalid = [] 1233 1234 for period in self.obj.get_periods(): 1235 errors = period.check_permitted(permitted_values) 1236 if errors: 1237 start_errors, end_errors = errors 1238 invalid.append((period.origin, start_errors, end_errors)) 1239 1240 return invalid 1241 1242 def correct_object(self): 1243 1244 "Correct the object according to any scheduling constraints." 1245 1246 permitted_values = self.get_permitted_values() 1247 return permitted_values and self.obj.correct_object(permitted_values) 1248 1249 def correct_period(self, period): 1250 1251 "Correct 'period' according to any scheduling constraints." 1252 1253 permitted_values = self.get_permitted_values() 1254 if not permitted_values: 1255 return period 1256 else: 1257 return period.get_corrected(permitted_values) 1258 1259 # Object retrieval. 1260 1261 def get_stored_object_version(self): 1262 1263 """ 1264 Return the stored object to which the current object refers for the 1265 current user. 1266 """ 1267 1268 return self.get_stored_object(self.uid, self.recurrenceid) 1269 1270 def get_definitive_object(self, as_organiser): 1271 1272 """ 1273 Return an object considered definitive for the current transaction, 1274 using 'as_organiser' to select the current transaction's object if 1275 false, or selecting a stored object if true. 1276 """ 1277 1278 return not as_organiser and self.obj or self.get_stored_object_version() 1279 1280 def get_parent_object(self): 1281 1282 """ 1283 Return the parent object to which the current object refers for the 1284 current user. 1285 """ 1286 1287 return self.recurrenceid and self.get_stored_object(self.uid, None) or None 1288 1289 # Convenience methods for modifying free/busy collections. 1290 1291 def get_recurrence_start_point(self, recurrenceid): 1292 1293 "Get 'recurrenceid' in a form suitable for matching free/busy entries." 1294 1295 return self.obj.get_recurrence_start_point(recurrenceid) 1296 1297 def remove_from_freebusy(self, freebusy, participant=None): 1298 1299 """ 1300 Remove this event from the given 'freebusy' collection. If 'participant' 1301 is specified, only remove this event if the participant is attending. 1302 """ 1303 1304 removed = freebusy.remove_event_periods(self.uid, self.recurrenceid, participant) 1305 if not removed and self.recurrenceid: 1306 return freebusy.remove_affected_period(self.uid, self.get_recurrence_start_point(self.recurrenceid), participant) 1307 else: 1308 return removed 1309 1310 def remove_freebusy_for_recurrences(self, freebusy, recurrenceids=None): 1311 1312 """ 1313 Remove from 'freebusy' any original recurrence from parent free/busy 1314 details for the current object, if the current object is a specific 1315 additional recurrence. Otherwise, remove all additional recurrence 1316 information corresponding to 'recurrenceids', or if omitted, all 1317 recurrences. 1318 """ 1319 1320 if self.recurrenceid: 1321 recurrenceid = self.get_recurrence_start_point(self.recurrenceid) 1322 freebusy.remove_affected_period(self.uid, recurrenceid) 1323 else: 1324 # Remove obsolete recurrence periods. 1325 1326 freebusy.remove_additional_periods(self.uid, recurrenceids) 1327 1328 # Remove original periods affected by additional recurrences. 1329 1330 if recurrenceids: 1331 for recurrenceid in recurrenceids: 1332 recurrenceid = self.get_recurrence_start_point(recurrenceid) 1333 freebusy.remove_affected_period(self.uid, recurrenceid) 1334 1335 def update_freebusy(self, freebusy, user, as_organiser, offer=False): 1336 1337 """ 1338 Update the 'freebusy' collection for this event with the periods and 1339 transparency associated with the current object, subject to the 'user' 1340 identity and the attendance details provided for them, indicating 1341 whether the update is being done 'as_organiser' (for the organiser of 1342 an event) or not. 1343 1344 If 'offer' is set to a true value, any free/busy updates will be tagged 1345 with an expiry time. 1346 """ 1347 1348 # Obtain the stored object if the current object is not issued by the 1349 # organiser. Attendees do not have the opportunity to redefine the 1350 # periods. 1351 1352 obj = self.get_definitive_object(as_organiser) 1353 if not obj: 1354 return 1355 1356 # Obtain the affected periods. 1357 1358 periods = self.get_periods(obj, future_only=True) 1359 1360 # Define an overriding transparency, the indicated event transparency, 1361 # or the default transparency for the free/busy entry. 1362 1363 transp = self.get_overriding_transparency(user, as_organiser) or \ 1364 obj.get_value("TRANSP") or \ 1365 "OPAQUE" 1366 1367 # Calculate any expiry time. If no offer period is defined, do not 1368 # record the offer periods. 1369 1370 if offer: 1371 offer_period = self.get_offer_period() 1372 if offer_period: 1373 expires = get_timestamp(offer_period) 1374 else: 1375 return 1376 else: 1377 expires = None 1378 1379 # Perform the low-level update. 1380 1381 Client.update_freebusy(self, freebusy, periods, transp, 1382 self.uid, self.recurrenceid, 1383 obj.get_value("SUMMARY"), 1384 obj.get_uri("ORGANIZER"), 1385 expires) 1386 1387 def update_freebusy_for_participant(self, freebusy, user, for_organiser=False, 1388 updating_other=False, offer=False): 1389 1390 """ 1391 Update the 'freebusy' collection for the given 'user', indicating 1392 whether the update is 'for_organiser' (being done for the organiser of 1393 an event) or not, and whether it is 'updating_other' (meaning another 1394 user's details). 1395 1396 If 'offer' is set to a true value, any free/busy updates will be tagged 1397 with an expiry time. 1398 """ 1399 1400 # Record in the free/busy details unless a non-participating attendee. 1401 # Remove periods for non-participating attendees. 1402 1403 if offer or self.is_participating(user, for_organiser and not updating_other): 1404 self.update_freebusy(freebusy, user, 1405 for_organiser and not updating_other or 1406 not for_organiser and updating_other, 1407 offer 1408 ) 1409 else: 1410 self.remove_from_freebusy(freebusy) 1411 1412 def remove_freebusy_for_participant(self, freebusy, user, for_organiser=False, 1413 updating_other=False): 1414 1415 """ 1416 Remove details from the 'freebusy' collection for the given 'user', 1417 indicating whether the modification is 'for_organiser' (being done for 1418 the organiser of an event) or not, and whether it is 'updating_other' 1419 (meaning another user's details). 1420 """ 1421 1422 # Remove from the free/busy details if a specified attendee. 1423 1424 if self.is_participating(user, for_organiser and not updating_other): 1425 self.remove_from_freebusy(freebusy) 1426 1427 # Convenience methods for updating stored free/busy information received 1428 # from other users. 1429 1430 def update_freebusy_from_participant(self, user, for_organiser, fn=None): 1431 1432 """ 1433 For the current user, record the free/busy information for another 1434 'user', indicating whether the update is 'for_organiser' or not, thus 1435 maintaining a separate record of their free/busy details. 1436 """ 1437 1438 fn = fn or self.update_freebusy_for_participant 1439 1440 # A user does not store free/busy information for themself as another 1441 # party. 1442 1443 if user == self.user: 1444 return 1445 1446 self.acquire_lock() 1447 try: 1448 freebusy = self.store.get_freebusy_for_other_for_update(self.user, user) 1449 fn(freebusy, user, for_organiser, True) 1450 1451 # Tidy up any obsolete recurrences. 1452 1453 self.remove_freebusy_for_recurrences(freebusy, self.get_recurrences()) 1454 self.store.set_freebusy_for_other(self.user, freebusy, user) 1455 1456 finally: 1457 self.release_lock() 1458 1459 def update_freebusy_from_organiser(self, organiser): 1460 1461 "For the current user, record free/busy information from 'organiser'." 1462 1463 self.update_freebusy_from_participant(organiser, True) 1464 1465 def update_freebusy_from_attendees(self, attendees): 1466 1467 "For the current user, record free/busy information from 'attendees'." 1468 1469 obj = self.get_stored_object_version() 1470 1471 if not obj or not self.have_new_object(): 1472 return False 1473 1474 # Filter out unrecognised attendees. 1475 1476 attendees = set(attendees).intersection(obj.get_uri_values("ATTENDEE")) 1477 1478 for attendee in attendees: 1479 self.update_freebusy_from_participant(attendee, False) 1480 1481 return True 1482 1483 def remove_freebusy_from_organiser(self, organiser): 1484 1485 "For the current user, remove free/busy information from 'organiser'." 1486 1487 self.update_freebusy_from_participant(organiser, True, self.remove_freebusy_for_participant) 1488 1489 def remove_freebusy_from_attendees(self, attendees): 1490 1491 "For the current user, remove free/busy information from 'attendees'." 1492 1493 for attendee in attendees.keys(): 1494 self.update_freebusy_from_participant(attendee, False, self.remove_freebusy_for_participant) 1495 1496 # Convenience methods for updating free/busy details at the event level. 1497 1498 def update_event_in_freebusy(self, for_organiser=True): 1499 1500 """ 1501 Update free/busy information when handling an object, doing so for the 1502 organiser of an event if 'for_organiser' is set to a true value. 1503 """ 1504 1505 freebusy = self.store.get_freebusy_for_update(self.user) 1506 1507 # Obtain the attendance attributes for this user, if available. 1508 1509 self.update_freebusy_for_participant(freebusy, self.user, for_organiser) 1510 1511 # Remove original recurrence details replaced by additional 1512 # recurrences, as well as obsolete additional recurrences. 1513 1514 self.remove_freebusy_for_recurrences(freebusy, self.get_recurrences()) 1515 self.store.set_freebusy(self.user, freebusy) 1516 1517 if self.publisher and self.is_sharing() and self.is_publishing(): 1518 self.publisher.set_freebusy(self.user, freebusy) 1519 1520 # Update free/busy provider information if the event may recur 1521 # indefinitely. 1522 1523 if self.possibly_recurring_indefinitely(): 1524 self.store.append_freebusy_provider(self.user, self.obj) 1525 1526 return True 1527 1528 def remove_event_from_freebusy(self): 1529 1530 "Remove free/busy information when handling an object." 1531 1532 freebusy = self.store.get_freebusy_for_update(self.user) 1533 1534 self.remove_from_freebusy(freebusy) 1535 self.remove_freebusy_for_recurrences(freebusy) 1536 self.store.set_freebusy(self.user, freebusy) 1537 1538 if self.publisher and self.is_sharing() and self.is_publishing(): 1539 self.publisher.set_freebusy(self.user, freebusy) 1540 1541 # Update free/busy provider information if the event may recur 1542 # indefinitely. 1543 1544 if self.possibly_recurring_indefinitely(): 1545 self.store.remove_freebusy_provider(self.user, self.obj) 1546 1547 def update_event_in_freebusy_offers(self): 1548 1549 "Update free/busy offers when handling an object." 1550 1551 freebusy = self.store.get_freebusy_offers_for_update(self.user) 1552 1553 # Obtain the attendance attributes for this user, if available. 1554 1555 self.update_freebusy_for_participant(freebusy, self.user, offer=True) 1556 1557 # Remove original recurrence details replaced by additional 1558 # recurrences, as well as obsolete additional recurrences. 1559 1560 self.remove_freebusy_for_recurrences(freebusy, self.get_recurrences()) 1561 self.store.set_freebusy_offers(self.user, freebusy) 1562 1563 return True 1564 1565 def remove_event_from_freebusy_offers(self): 1566 1567 "Remove free/busy offers when handling an object." 1568 1569 freebusy = self.store.get_freebusy_offers_for_update(self.user) 1570 1571 self.remove_from_freebusy(freebusy) 1572 self.remove_freebusy_for_recurrences(freebusy) 1573 self.store.set_freebusy_offers(self.user, freebusy) 1574 1575 return True 1576 1577 # Convenience methods for removing counter-proposals and updating the 1578 # request queue. 1579 1580 def remove_request(self): 1581 return self.store.dequeue_request(self.user, self.uid, self.recurrenceid) 1582 1583 def remove_event(self): 1584 return self.store.remove_event(self.user, self.uid, self.recurrenceid) 1585 1586 def remove_counter(self, attendee): 1587 self.remove_counters([attendee]) 1588 1589 def remove_counters(self, attendees): 1590 for attendee in attendees: 1591 self.store.remove_counter(self.user, attendee, self.uid, self.recurrenceid) 1592 1593 if not self.store.get_counters(self.user, self.uid, self.recurrenceid): 1594 self.store.dequeue_request(self.user, self.uid, self.recurrenceid) 1595 1596 # vim: tabstop=4 expandtab shiftwidth=4