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