1 #!/usr/bin/env python 2 3 """ 4 A Web interface to a user's calendar. 5 6 Copyright (C) 2014, 2015 Paul Boddie <paul@boddie.org.uk> 7 8 This program is free software; you can redistribute it and/or modify it under 9 the terms of the GNU General Public License as published by the Free Software 10 Foundation; either version 3 of the License, or (at your option) any later 11 version. 12 13 This program is distributed in the hope that it will be useful, but WITHOUT 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 15 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more 16 details. 17 18 You should have received a copy of the GNU General Public License along with 19 this program. If not, see <http://www.gnu.org/licenses/>. 20 """ 21 22 # Edit this path to refer to the location of the imiptools libraries, if 23 # necessary. 24 25 LIBRARY_PATH = "/var/lib/imip-agent" 26 27 from datetime import date, datetime, timedelta 28 import babel.dates 29 import cgi, os, sys 30 31 sys.path.append(LIBRARY_PATH) 32 33 from imiptools.content import Handler 34 from imiptools.data import get_address, get_uri, make_freebusy, parse_object, \ 35 Object, to_part 36 from imiptools.dates import format_datetime, get_datetime, get_datetime_item, \ 37 get_end_of_day, get_start_of_day, get_start_of_next_day, \ 38 get_timestamp, ends_on_same_day, to_timezone 39 from imiptools.mail import Messenger 40 from imiptools.period import add_day_start_points, add_empty_days, add_slots, \ 41 convert_periods, get_freebusy_details, \ 42 get_scale, have_conflict, get_slots, get_spans, \ 43 partition_by_day 44 from imiptools.profile import Preferences 45 import imip_store 46 import markup 47 48 getenv = os.environ.get 49 setenv = os.environ.__setitem__ 50 51 class CGIEnvironment: 52 53 "A CGI-compatible environment." 54 55 def __init__(self, charset=None): 56 self.charset = charset 57 self.args = None 58 self.method = None 59 self.path = None 60 self.path_info = None 61 self.user = None 62 63 def get_args(self): 64 if self.args is None: 65 if self.get_method() != "POST": 66 setenv("QUERY_STRING", "") 67 args = cgi.parse(keep_blank_values=True) 68 69 if not self.charset: 70 self.args = args 71 else: 72 self.args = {} 73 for key, values in args.items(): 74 self.args[key] = [unicode(value, self.charset) for value in values] 75 76 return self.args 77 78 def get_method(self): 79 if self.method is None: 80 self.method = getenv("REQUEST_METHOD") or "GET" 81 return self.method 82 83 def get_path(self): 84 if self.path is None: 85 self.path = getenv("SCRIPT_NAME") or "" 86 return self.path 87 88 def get_path_info(self): 89 if self.path_info is None: 90 self.path_info = getenv("PATH_INFO") or "" 91 return self.path_info 92 93 def get_user(self): 94 if self.user is None: 95 self.user = getenv("REMOTE_USER") or "" 96 return self.user 97 98 def get_output(self): 99 return sys.stdout 100 101 def get_url(self): 102 path = self.get_path() 103 path_info = self.get_path_info() 104 return "%s%s" % (path.rstrip("/"), path_info) 105 106 def new_url(self, path_info): 107 path = self.get_path() 108 return "%s/%s" % (path.rstrip("/"), path_info.lstrip("/")) 109 110 class ManagerHandler(Handler): 111 112 """ 113 A content handler for use by the manager, as opposed to operating within the 114 mail processing pipeline. 115 """ 116 117 def __init__(self, obj, user, messenger): 118 Handler.__init__(self, messenger=messenger) 119 self.set_object(obj) 120 self.user = user 121 122 self.organiser = self.obj.get_value("ORGANIZER") 123 self.attendees = self.obj.get_values("ATTENDEE") 124 125 # Communication methods. 126 127 def send_message(self, method, sender, for_organiser): 128 129 """ 130 Create a full calendar object employing the given 'method', and send it 131 to the appropriate recipients, also sending a copy to the 'sender'. The 132 'for_organiser' value indicates whether the organiser is sending this 133 message. 134 """ 135 136 parts = [self.obj.to_part(method)] 137 138 # As organiser, send an invitation to attendees, excluding oneself if 139 # also attending. The updated event will be saved by the outgoing 140 # handler. 141 142 if for_organiser: 143 recipients = [get_address(attendee) for attendee in self.attendees if attendee != self.user] 144 else: 145 recipients = [get_address(self.organiser)] 146 147 # Bundle free/busy information if appropriate. 148 149 preferences = Preferences(self.user) 150 151 if preferences.get("freebusy_sharing") == "share" and \ 152 preferences.get("freebusy_bundling") == "always": 153 154 # Invent a unique identifier. 155 156 utcnow = get_timestamp() 157 uid = "imip-agent-%s-%s" % (utcnow, get_address(self.user)) 158 159 freebusy = self.store.get_freebusy(self.user) 160 parts.append(to_part("PUBLISH", [make_freebusy(freebusy, uid, self.user)])) 161 162 message = self.messenger.make_outgoing_message(parts, recipients, outgoing_bcc=sender) 163 self.messenger.sendmail(recipients, message.as_string(), outgoing_bcc=sender) 164 165 # Action methods. 166 167 def process_received_request(self, update=False): 168 169 """ 170 Process the current request for the given 'user'. Return whether any 171 action was taken. 172 173 If 'update' is given, the sequence number will be incremented in order 174 to override any previous response. 175 """ 176 177 # Reply only on behalf of this user. 178 179 for attendee, attendee_attr in self.obj.get_items("ATTENDEE"): 180 181 if attendee == self.user: 182 if attendee_attr.has_key("RSVP"): 183 del attendee_attr["RSVP"] 184 if self.messenger and self.messenger.sender != get_address(attendee): 185 attendee_attr["SENT-BY"] = get_uri(self.messenger.sender) 186 self.obj["ATTENDEE"] = [(attendee, attendee_attr)] 187 188 self.update_dtstamp() 189 self.set_sequence(update) 190 191 self.send_message("REPLY", get_address(attendee), for_organiser=False) 192 193 return True 194 195 return False 196 197 def process_created_request(self, method, update=False): 198 199 """ 200 Process the current request for the given 'user', sending a created 201 request of the given 'method' to attendees. Return whether any action 202 was taken. 203 204 If 'update' is given, the sequence number will be incremented in order 205 to override any previous message. 206 """ 207 208 organiser, organiser_attr = self.obj.get_item("ORGANIZER") 209 210 if self.messenger and self.messenger.sender != get_address(organiser): 211 organiser_attr["SENT-BY"] = get_uri(self.messenger.sender) 212 213 self.update_dtstamp() 214 self.set_sequence(update) 215 216 self.send_message(method, get_address(self.organiser), for_organiser=True) 217 return True 218 219 class Manager: 220 221 "A simple manager application." 222 223 def __init__(self, messenger=None): 224 self.messenger = messenger or Messenger() 225 226 self.encoding = "utf-8" 227 self.env = CGIEnvironment(self.encoding) 228 229 user = self.env.get_user() 230 self.user = user and get_uri(user) or None 231 self.preferences = None 232 self.locale = None 233 self.requests = None 234 235 self.out = self.env.get_output() 236 self.page = markup.page() 237 238 self.store = imip_store.FileStore() 239 self.objects = {} 240 241 try: 242 self.publisher = imip_store.FilePublisher() 243 except OSError: 244 self.publisher = None 245 246 def _get_uid(self, path_info): 247 return path_info.lstrip("/").split("/", 1)[0] 248 249 def _get_object(self, uid): 250 if self.objects.has_key(uid): 251 return self.objects[uid] 252 253 f = uid and self.store.get_event(self.user, uid) or None 254 255 if not f: 256 return None 257 258 fragment = parse_object(f, "utf-8") 259 obj = self.objects[uid] = fragment and Object(fragment) 260 261 return obj 262 263 def _get_requests(self): 264 if self.requests is None: 265 self.requests = self.store.get_requests(self.user) 266 return self.requests 267 268 def _get_request_summary(self): 269 summary = [] 270 for uid in self._get_requests(): 271 obj = self._get_object(uid) 272 if obj: 273 summary.append(( 274 obj.get_value("DTSTART"), 275 obj.get_value("DTEND"), 276 uid 277 )) 278 return summary 279 280 # Preference methods. 281 282 def get_user_locale(self): 283 if not self.locale: 284 self.locale = self.get_preferences().get("LANG", "C") 285 return self.locale 286 287 def get_preferences(self): 288 if not self.preferences: 289 self.preferences = Preferences(self.user) 290 return self.preferences 291 292 def get_tzid(self): 293 prefs = self.get_preferences() 294 return prefs.get("TZID", "UTC") 295 296 # Prettyprinting of dates and times. 297 298 def format_date(self, dt, format): 299 return self._format_datetime(babel.dates.format_date, dt, format) 300 301 def format_time(self, dt, format): 302 return self._format_datetime(babel.dates.format_time, dt, format) 303 304 def format_datetime(self, dt, format): 305 return self._format_datetime( 306 isinstance(dt, datetime) and babel.dates.format_datetime or babel.dates.format_date, 307 dt, format) 308 309 def format_end_datetime(self, dt, format): 310 if isinstance(dt, date) and not isinstance(dt, datetime): 311 dt = dt - timedelta(1) 312 return self.format_datetime(dt, format) 313 314 def _format_datetime(self, fn, dt, format): 315 return fn(dt, format=format, locale=self.get_user_locale()) 316 317 # Data management methods. 318 319 def remove_request(self, uid): 320 return self.store.dequeue_request(self.user, uid) 321 322 def remove_event(self, uid): 323 return self.store.remove_event(self.user, uid) 324 325 # Presentation methods. 326 327 def new_page(self, title): 328 self.page.init(title=title, charset=self.encoding, css=self.env.new_url("styles.css")) 329 330 def status(self, code, message): 331 self.header("Status", "%s %s" % (code, message)) 332 333 def header(self, header, value): 334 print >>self.out, "%s: %s" % (header, value) 335 336 def no_user(self): 337 self.status(403, "Forbidden") 338 self.new_page(title="Forbidden") 339 self.page.p("You are not logged in and thus cannot access scheduling requests.") 340 341 def no_page(self): 342 self.status(404, "Not Found") 343 self.new_page(title="Not Found") 344 self.page.p("No page is provided at the given address.") 345 346 def redirect(self, url): 347 self.status(302, "Redirect") 348 self.header("Location", url) 349 self.new_page(title="Redirect") 350 self.page.p("Redirecting to: %s" % url) 351 352 # Request logic methods. 353 354 def handle_newevent(self): 355 356 """ 357 Handle any new event operation, creating a new event and redirecting to 358 the event page for further activity. 359 """ 360 361 # Handle a submitted form. 362 363 args = self.env.get_args() 364 365 if not args.has_key("newevent"): 366 return 367 368 # Create a new event using the available information. 369 370 slots = args.get("slot", []) 371 participants = args.get("participants", []) 372 373 if not slots: 374 return 375 376 # Obtain the user's timezone. 377 378 tzid = self.get_tzid() 379 380 # Coalesce the selected slots. 381 382 slots.sort() 383 coalesced = [] 384 last = None 385 386 for slot in slots: 387 start, end = slot.split("-") 388 start = get_datetime(start, {"TZID" : tzid}) 389 end = end and get_datetime(end, {"TZID" : tzid}) or get_start_of_next_day(start, tzid) 390 391 if last: 392 last_start, last_end = last 393 394 # Merge adjacent dates and datetimes. 395 396 if start == last_end or get_start_of_day(last_end, tzid) == get_start_of_day(start, tzid): 397 last = last_start, end 398 continue 399 400 # Handle datetimes within dates. 401 # Datetime periods are within single days and are therefore 402 # discarded. 403 404 elif get_start_of_day(start, tzid) == get_start_of_day(last_start, tzid): 405 continue 406 407 # Add separate dates and datetimes. 408 409 else: 410 coalesced.append(last) 411 412 last = start, end 413 414 if last: 415 coalesced.append(last) 416 417 # Invent a unique identifier. 418 419 utcnow = get_timestamp() 420 uid = "imip-agent-%s-%s" % (utcnow, get_address(self.user)) 421 422 # Define a single occurrence if only one coalesced slot exists. 423 # Otherwise, many occurrences are defined. 424 425 for i, (start, end) in enumerate(coalesced): 426 this_uid = "%s-%s" % (uid, i) 427 428 start_value, start_attr = get_datetime_item(start, tzid) 429 end_value, end_attr = get_datetime_item(end, tzid) 430 431 # Create a calendar object and store it as a request. 432 433 record = [] 434 rwrite = record.append 435 436 rwrite(("UID", {}, this_uid)) 437 rwrite(("SUMMARY", {}, "New event at %s" % utcnow)) 438 rwrite(("DTSTAMP", {}, utcnow)) 439 rwrite(("DTSTART", start_attr, start_value)) 440 rwrite(("DTEND", end_attr, end_value)) 441 rwrite(("ORGANIZER", {}, self.user)) 442 443 for participant in participants: 444 if not participant: 445 continue 446 participant = get_uri(participant) 447 rwrite(("ATTENDEE", {"RSVP" : "TRUE", "PARTSTAT" : "NEEDS-ACTION"}, participant)) 448 449 obj = ("VEVENT", {}, record) 450 451 self.store.set_event(self.user, this_uid, obj) 452 self.store.queue_request(self.user, this_uid) 453 454 # Redirect to the object (or the first of the objects), where instead of 455 # attendee controls, there will be organiser controls. 456 457 self.redirect(self.env.new_url("%s-0" % uid)) 458 459 def handle_request(self, uid, obj, queued): 460 461 """ 462 Handle actions involving the given 'uid' and 'obj' object, where 463 'queued' indicates that the object has not yet been handled. 464 """ 465 466 # Handle a submitted form. 467 468 args = self.env.get_args() 469 handled = True 470 471 # Update the object. 472 473 if args.has_key("summary"): 474 obj["SUMMARY"] = [(args["summary"][0], {})] 475 476 if args.has_key("partstat"): 477 organisers = obj.get_value_map("ORGANIZER") 478 attendees = obj.get_value_map("ATTENDEE") 479 d = attendees.has_key(self.user) and attendees or organisers.has_key(self.user) and organisers or None 480 if d: 481 d[self.user]["PARTSTAT"] = args["partstat"][0] 482 483 # Process any action. 484 485 reply = args.has_key("reply") 486 discard = args.has_key("discard") 487 invite = args.has_key("invite") 488 cancel = args.has_key("cancel") 489 save = args.has_key("save") 490 update = not queued and args.has_key("update") 491 492 if reply or invite or cancel: 493 494 handler = ManagerHandler(obj, self.user, self.messenger) 495 496 # Process the object and remove it from the list of requests. 497 498 if reply and handler.process_received_request(update) or \ 499 (invite or cancel) and handler.process_created_request(invite and "REQUEST" or "CANCEL", update): 500 501 self.remove_request(uid) 502 503 # Save single user events. 504 505 elif save: 506 self.store.set_event(self.user, uid, obj.to_node()) 507 freebusy = self.store.get_freebusy(self.user) 508 self.remove_request(uid) 509 510 # Remove the request and the object. 511 512 elif discard: 513 self.remove_event(uid) 514 self.remove_request(uid) 515 516 else: 517 handled = False 518 519 # Upon handling an action, redirect to the main page. 520 521 if handled: 522 self.redirect(self.env.get_path()) 523 524 return handled 525 526 # Page fragment methods. 527 528 def show_request_controls(self, obj, needs_update): 529 530 """ 531 Show form controls for a request concerning 'obj', indicating whether 532 an update will be performed if 'needs_update' is specified as a true 533 value. 534 """ 535 536 page = self.page 537 538 is_organiser = obj.get_value("ORGANIZER") == self.user 539 540 attendees = obj.get_value_map("ATTENDEE") 541 is_attendee = attendees.has_key(self.user) 542 attendee_attr = attendees.get(self.user) 543 544 is_request = obj.get_value("UID") in self._get_requests() 545 546 have_other_attendees = len(attendees) > (is_attendee and 1 or 0) 547 548 # Show appropriate options depending on the role of the user. 549 550 if is_attendee and not is_organiser: 551 if needs_update: 552 page.p("This request can be updated as follows:") 553 else: 554 page.p("An action is required for this request:") 555 556 page.p() 557 page.input(name="reply", type="submit", value="Reply") 558 page.add(" ") 559 page.input(name="discard", type="submit", value="Discard") 560 page.p.close() 561 562 if is_organiser: 563 if have_other_attendees: 564 if needs_update: 565 page.p("As organiser, you can perform the following:") 566 else: 567 page.p("As organiser, you will need to perform an action:") 568 569 page.p() 570 page.input(name="invite", type="submit", value="Invite") 571 page.add(" ") 572 if is_request: 573 page.input(name="discard", type="submit", value="Discard") 574 else: 575 page.input(name="cancel", type="submit", value="Cancel") 576 page.p.close() 577 else: 578 page.p() 579 page.input(name="save", type="submit", value="Save") 580 page.add(" ") 581 page.input(name="discard", type="submit", value="Discard") 582 page.p.close() 583 584 # Updated objects need to have details updated upon sending. 585 586 if needs_update: 587 page.input(name="update", type="hidden", value="true") 588 589 object_labels = { 590 "SUMMARY" : "Summary", 591 "DTSTART" : "Start", 592 "DTEND" : "End", 593 "ORGANIZER" : "Organiser", 594 "ATTENDEE" : "Attendee", 595 } 596 597 partstat_items = [ 598 ("NEEDS-ACTION", "Not confirmed"), 599 ("ACCEPTED", "Attending"), 600 ("TENTATIVE", "Tentatively attending"), 601 ("DECLINED", "Not attending"), 602 ("DELEGATED", "Delegated"), 603 ] 604 605 def show_object_on_page(self, uid, obj, needs_update): 606 607 """ 608 Show the calendar object with the given 'uid' and representation 'obj' 609 on the current page. 610 """ 611 612 page = self.page 613 page.form(method="POST") 614 615 # Obtain the user's timezone. 616 617 tzid = self.get_tzid() 618 619 # Provide a summary of the object. 620 621 page.table(class_="object", cellspacing=5, cellpadding=5) 622 page.thead() 623 page.tr() 624 page.th("Event", class_="mainheading", colspan=3) 625 page.tr.close() 626 page.thead.close() 627 page.tbody() 628 629 is_organiser = obj.get_value("ORGANIZER") == self.user 630 631 for name in ["SUMMARY", "DTSTART", "DTEND", "ORGANIZER", "ATTENDEE"]: 632 page.tr() 633 634 label = self.object_labels.get(name, name) 635 636 # Handle datetimes specially. 637 638 if name in ["DTSTART", "DTEND"]: 639 value, attr = obj.get_item(name) 640 tzid = attr.get("TZID", tzid) 641 value = ( 642 name == "DTSTART" and self.format_datetime or self.format_end_datetime 643 )(to_timezone(get_datetime(value), tzid), "full") 644 page.th(label, class_="objectheading") 645 page.td(value, colspan=2) 646 page.tr.close() 647 648 # Handle the summary specially. 649 650 elif name == "SUMMARY": 651 value = obj.get_value(name) 652 page.th(label, class_="objectheading") 653 page.td(colspan=2) 654 if is_organiser: 655 page.input(name="summary", type="text", value=value, size=80) 656 else: 657 page.add(value) 658 page.td.close() 659 page.tr.close() 660 661 # Handle potentially many values. 662 663 else: 664 items = obj.get_items(name) 665 if not items: 666 continue 667 668 page.th(label, class_="objectheading", rowspan=len(items)) 669 670 first = True 671 672 for value, attr in items: 673 if not first: 674 page.tr() 675 else: 676 first = False 677 678 if name in ("ATTENDEE", "ORGANIZER"): 679 page.td(class_="objectattribute") 680 page.add(value) 681 page.td.close() 682 page.td(class_="partstat") 683 684 partstat = attr.get("PARTSTAT") 685 if value == self.user: 686 self._show_menu("partstat", partstat, self.partstat_items) 687 else: 688 page.add(dict(self.partstat_items).get(partstat, "")) 689 else: 690 page.td(class_="objectattribute", colspan=2) 691 page.add(value) 692 693 page.td.close() 694 page.tr.close() 695 696 page.tbody.close() 697 page.table.close() 698 699 dtstart = format_datetime(obj.get_utc_datetime("DTSTART")) 700 dtend = format_datetime(obj.get_utc_datetime("DTEND")) 701 702 # Indicate whether there are conflicting events. 703 704 freebusy = self.store.get_freebusy(self.user) 705 706 if freebusy: 707 708 # Obtain any time zone details from the suggested event. 709 710 _dtstart, attr = obj.get_item("DTSTART") 711 tzid = attr.get("TZID", tzid) 712 713 # Show any conflicts. 714 715 for t in have_conflict(freebusy, [(dtstart, dtend)], True): 716 start, end, found_uid = t[:3] 717 718 # Provide details of any conflicting event. 719 720 if uid != found_uid: 721 start = self.format_datetime(to_timezone(get_datetime(start), tzid), "full") 722 end = self.format_datetime(to_timezone(get_datetime(end), tzid), "full") 723 page.p("Event conflicts with another from %s to %s: " % (start, end)) 724 725 # Show the event summary for the conflicting event. 726 727 found_obj = self._get_object(found_uid) 728 if found_obj: 729 page.a(found_obj.get_value("SUMMARY"), href=self.env.new_url(found_uid)) 730 731 self.show_request_controls(obj, needs_update) 732 page.form.close() 733 734 def show_requests_on_page(self): 735 736 "Show requests for the current user." 737 738 # NOTE: This list could be more informative, but it is envisaged that 739 # NOTE: the requests would be visited directly anyway. 740 741 requests = self._get_requests() 742 743 self.page.div(id="pending-requests") 744 745 if requests: 746 self.page.p("Pending requests:") 747 748 self.page.ul() 749 750 for request in requests: 751 obj = self._get_object(request) 752 if obj: 753 self.page.li() 754 self.page.a(obj.get_value("SUMMARY"), href="#request-%s" % request) 755 self.page.li.close() 756 757 self.page.ul.close() 758 759 else: 760 self.page.p("There are no pending requests.") 761 762 self.page.div.close() 763 764 def show_participants_on_page(self): 765 766 "Show participants for scheduling purposes." 767 768 args = self.env.get_args() 769 participants = args.get("participants", []) 770 771 try: 772 for name, value in args.items(): 773 if name.startswith("remove-participant-"): 774 i = int(name[len("remove-participant-"):]) 775 del participants[i] 776 break 777 except ValueError: 778 pass 779 780 # Trim empty participants. 781 782 while participants and not participants[-1].strip(): 783 participants.pop() 784 785 # Show any specified participants together with controls to remove and 786 # add participants. 787 788 self.page.div(id="participants") 789 790 self.page.p("Participants for scheduling:") 791 792 for i, participant in enumerate(participants): 793 self.page.p() 794 self.page.input(name="participants", type="text", value=participant) 795 self.page.input(name="remove-participant-%d" % i, type="submit", value="Remove") 796 self.page.p.close() 797 798 self.page.p() 799 self.page.input(name="participants", type="text") 800 self.page.input(name="add-participant", type="submit", value="Add") 801 self.page.p.close() 802 803 self.page.div.close() 804 805 return participants 806 807 # Full page output methods. 808 809 def show_object(self, path_info): 810 811 "Show an object request using the given 'path_info' for the current user." 812 813 uid = self._get_uid(path_info) 814 obj = self._get_object(uid) 815 816 if not obj: 817 return False 818 819 is_request = uid in self._get_requests() 820 handled = self.handle_request(uid, obj, is_request) 821 822 if handled: 823 return True 824 825 self.new_page(title="Event") 826 self.show_object_on_page(uid, obj, not is_request) 827 828 return True 829 830 def show_calendar(self): 831 832 "Show the calendar for the current user." 833 834 handled = self.handle_newevent() 835 836 self.new_page(title="Calendar") 837 page = self.page 838 839 # Form controls are used in various places on the calendar page. 840 841 page.form(method="POST") 842 843 self.show_requests_on_page() 844 participants = self.show_participants_on_page() 845 846 # Show a button for scheduling a new event. 847 848 page.p(class_="controls") 849 page.input(name="newevent", type="submit", value="New event", id="newevent") 850 page.input(name="reset", type="submit", value="Clear selections", id="reset") 851 page.p.close() 852 853 # Show controls for hiding empty days and busy slots. 854 # The positioning of the control, paragraph and table are important here. 855 856 page.input(name="showdays", type="checkbox", value="hide", id="showdays", accesskey="D") 857 page.input(name="hidebusy", type="checkbox", value="hide", id="hidebusy", accesskey="B") 858 859 page.p(class_="controls") 860 page.label("Hide busy time periods", for_="hidebusy", class_="hidebusy enable") 861 page.label("Show busy time periods", for_="hidebusy", class_="hidebusy disable") 862 page.label("Show empty days", for_="showdays", class_="showdays enable") 863 page.label("Hide empty days", for_="showdays", class_="showdays disable") 864 page.p.close() 865 866 freebusy = self.store.get_freebusy(self.user) 867 868 if not freebusy: 869 page.p("No events scheduled.") 870 return 871 872 # Obtain the user's timezone. 873 874 tzid = self.get_tzid() 875 876 # Day view: start at the earliest known day and produce days until the 877 # latest known day, perhaps with expandable sections of empty days. 878 879 # Month view: start at the earliest known month and produce months until 880 # the latest known month, perhaps with expandable sections of empty 881 # months. 882 883 # Details of users to invite to new events could be superimposed on the 884 # calendar. 885 886 # Requests are listed and linked to their tentative positions in the 887 # calendar. Other participants are also shown. 888 889 request_summary = self._get_request_summary() 890 891 period_groups = [request_summary, freebusy] 892 period_group_types = ["request", "freebusy"] 893 period_group_sources = ["Pending requests", "Your schedule"] 894 895 for i, participant in enumerate(participants): 896 period_groups.append(self.store.get_freebusy_for_other(self.user, get_uri(participant))) 897 period_group_types.append("freebusy-part%d" % i) 898 period_group_sources.append(participant) 899 900 groups = [] 901 group_columns = [] 902 group_types = period_group_types 903 group_sources = period_group_sources 904 all_points = set() 905 906 # Obtain time point information for each group of periods. 907 908 for periods in period_groups: 909 periods = convert_periods(periods, tzid) 910 911 # Get the time scale with start and end points. 912 913 scale = get_scale(periods) 914 915 # Get the time slots for the periods. 916 917 slots = get_slots(scale) 918 919 # Add start of day time points for multi-day periods. 920 921 add_day_start_points(slots, tzid) 922 923 # Record the slots and all time points employed. 924 925 groups.append(slots) 926 all_points.update([point for point, active in slots]) 927 928 # Partition the groups into days. 929 930 days = {} 931 partitioned_groups = [] 932 partitioned_group_types = [] 933 partitioned_group_sources = [] 934 935 for slots, group_type, group_source in zip(groups, group_types, group_sources): 936 937 # Propagate time points to all groups of time slots. 938 939 add_slots(slots, all_points) 940 941 # Count the number of columns employed by the group. 942 943 columns = 0 944 945 # Partition the time slots by day. 946 947 partitioned = {} 948 949 for day, day_slots in partition_by_day(slots).items(): 950 intervals = [] 951 last = None 952 953 for point, active in day_slots: 954 columns = max(columns, len(active)) 955 if last: 956 intervals.append((last, point)) 957 last = point 958 959 if last: 960 intervals.append((last, None)) 961 962 if not days.has_key(day): 963 days[day] = set() 964 965 # Convert each partition to a mapping from points to active 966 # periods. 967 968 partitioned[day] = dict(day_slots) 969 970 # Record the divisions or intervals within each day. 971 972 days[day].update(intervals) 973 974 if group_type != "request" or columns: 975 group_columns.append(columns) 976 partitioned_groups.append(partitioned) 977 partitioned_group_types.append(group_type) 978 partitioned_group_sources.append(group_source) 979 980 # Add empty days. 981 982 add_empty_days(days, tzid) 983 984 # Show the controls permitting day selection. 985 986 self.show_calendar_day_controls(days) 987 988 # Show the calendar itself. 989 990 page.table(cellspacing=5, cellpadding=5, class_="calendar") 991 self.show_calendar_participant_headings(partitioned_group_types, partitioned_group_sources, group_columns) 992 self.show_calendar_days(days, partitioned_groups, partitioned_group_types, group_columns) 993 page.table.close() 994 995 # End the form region. 996 997 page.form.close() 998 999 # More page fragment methods. 1000 1001 def show_calendar_day_controls(self, days): 1002 1003 "Show controls for the given 'days' in the calendar." 1004 1005 page = self.page 1006 slots = self.env.get_args().get("slot", []) 1007 1008 for day in days: 1009 value, identifier = self._day_value_and_identifier(day) 1010 self._slot_selector(value, identifier, slots) 1011 1012 # Generate a dynamic stylesheet to allow day selections to colour 1013 # specific days. 1014 # NOTE: The style details need to be coordinated with the static 1015 # NOTE: stylesheet. 1016 1017 page.style(type="text/css") 1018 1019 for day in days: 1020 daystr = format_datetime(day) 1021 page.add("""\ 1022 input.newevent.selector#day-%s-:checked ~ table label.day.day-%s, 1023 input.newevent.selector#day-%s-:checked ~ table label.timepoint.day-%s { 1024 background-color: #5f4; 1025 text-decoration: underline; 1026 } 1027 """ % (daystr, daystr, daystr, daystr)) 1028 1029 page.style.close() 1030 1031 def show_calendar_participant_headings(self, group_types, group_sources, group_columns): 1032 1033 """ 1034 Show headings for the participants and other scheduling contributors, 1035 defined by 'group_types', 'group_sources' and 'group_columns'. 1036 """ 1037 1038 page = self.page 1039 1040 page.colgroup(span=1, id="columns-timeslot") 1041 1042 for group_type, columns in zip(group_types, group_columns): 1043 page.colgroup(span=max(columns, 1), id="columns-%s" % group_type) 1044 1045 page.thead() 1046 page.tr() 1047 page.th("", class_="emptyheading") 1048 1049 for group_type, source, columns in zip(group_types, group_sources, group_columns): 1050 page.th(source, 1051 class_=(group_type == "request" and "requestheading" or "participantheading"), 1052 colspan=max(columns, 1)) 1053 1054 page.tr.close() 1055 page.thead.close() 1056 1057 def show_calendar_days(self, days, partitioned_groups, partitioned_group_types, group_columns): 1058 1059 """ 1060 Show calendar days, defined by a collection of 'days', the contributing 1061 period information as 'partitioned_groups' (partitioned by day), the 1062 'partitioned_group_types' indicating the kind of contribution involved, 1063 and the 'group_columns' defining the number of columns in each group. 1064 """ 1065 1066 page = self.page 1067 1068 # Determine the number of columns required. Where participants provide 1069 # no columns for events, one still needs to be provided for the 1070 # participant itself. 1071 1072 all_columns = sum([max(columns, 1) for columns in group_columns]) 1073 1074 # Determine the days providing time slots. 1075 1076 all_days = days.items() 1077 all_days.sort() 1078 1079 # Produce a heading and time points for each day. 1080 1081 for day, intervals in all_days: 1082 groups_for_day = [partitioned.get(day) for partitioned in partitioned_groups] 1083 is_empty = True 1084 1085 for slots in groups_for_day: 1086 if not slots: 1087 continue 1088 1089 for active in slots.values(): 1090 if active: 1091 is_empty = False 1092 break 1093 1094 page.thead(class_="separator%s" % (is_empty and " empty" or "")) 1095 page.tr() 1096 page.th(class_="dayheading container", colspan=all_columns+1) 1097 self._day_heading(day) 1098 page.th.close() 1099 page.tr.close() 1100 page.thead.close() 1101 1102 page.tbody(class_="points%s" % (is_empty and " empty" or "")) 1103 self.show_calendar_points(intervals, groups_for_day, partitioned_group_types, group_columns) 1104 page.tbody.close() 1105 1106 def show_calendar_points(self, intervals, groups, group_types, group_columns): 1107 1108 """ 1109 Show the time 'intervals' along with period information from the given 1110 'groups', having the indicated 'group_types', each with the number of 1111 columns given by 'group_columns'. 1112 """ 1113 1114 page = self.page 1115 1116 # Obtain the user's timezone. 1117 1118 tzid = self.get_tzid() 1119 1120 # Produce a row for each interval. 1121 1122 intervals = list(intervals) 1123 intervals.sort() 1124 1125 for point, endpoint in intervals: 1126 continuation = point == get_start_of_day(point, tzid) 1127 1128 # Some rows contain no period details and are marked as such. 1129 1130 have_active = reduce(lambda x, y: x or y, [slots and slots.get(point) for slots in groups], None) 1131 1132 css = " ".join( 1133 ["slot"] + 1134 (have_active and ["busy"] or ["empty"]) + 1135 (continuation and ["daystart"] or []) 1136 ) 1137 1138 page.tr(class_=css) 1139 page.th(class_="timeslot") 1140 self._time_point(point, endpoint) 1141 page.th.close() 1142 1143 # Obtain slots for the time point from each group. 1144 1145 for columns, slots, group_type in zip(group_columns, groups, group_types): 1146 active = slots and slots.get(point) 1147 1148 # Where no periods exist for the given time interval, generate 1149 # an empty cell. Where a participant provides no periods at all, 1150 # the colspan is adjusted to be 1, not 0. 1151 1152 if not active: 1153 page.td(class_="empty container", colspan=max(columns, 1)) 1154 self._empty_slot(point, endpoint) 1155 page.td.close() 1156 continue 1157 1158 slots = slots.items() 1159 slots.sort() 1160 spans = get_spans(slots) 1161 1162 empty = 0 1163 1164 # Show a column for each active period. 1165 1166 for t in active: 1167 if t and len(t) >= 2: 1168 1169 # Flush empty slots preceding this one. 1170 1171 if empty: 1172 page.td(class_="empty container", colspan=empty) 1173 self._empty_slot(point, endpoint) 1174 page.td.close() 1175 empty = 0 1176 1177 start, end, uid, key = get_freebusy_details(t) 1178 span = spans[key] 1179 1180 # Produce a table cell only at the start of the period 1181 # or when continued at the start of a day. 1182 1183 if point == start or continuation: 1184 1185 obj = self._get_object(uid) 1186 1187 has_continued = continuation and point != start 1188 will_continue = not ends_on_same_day(point, end, tzid) 1189 is_organiser = obj.get_value("ORGANIZER") == self.user 1190 1191 css = " ".join( 1192 ["event"] + 1193 (has_continued and ["continued"] or []) + 1194 (will_continue and ["continues"] or []) + 1195 (is_organiser and ["organising"] or ["attending"]) 1196 ) 1197 1198 # Only anchor the first cell of events. 1199 1200 if point == start: 1201 page.td(class_=css, rowspan=span, id="%s-%s" % (group_type, uid)) 1202 else: 1203 page.td(class_=css, rowspan=span) 1204 1205 if not obj: 1206 page.span("") 1207 else: 1208 summary = obj.get_value("SUMMARY") 1209 1210 # Only link to events if they are not being 1211 # updated by requests. 1212 1213 if uid in self._get_requests() and group_type != "request": 1214 page.span(summary) 1215 else: 1216 href = "%s/%s" % (self.env.get_url().rstrip("/"), uid) 1217 page.a(summary, href=href) 1218 1219 page.td.close() 1220 else: 1221 empty += 1 1222 1223 # Pad with empty columns. 1224 1225 empty = columns - len(active) 1226 1227 if empty: 1228 page.td(class_="empty container", colspan=empty) 1229 self._empty_slot(point, endpoint) 1230 page.td.close() 1231 1232 page.tr.close() 1233 1234 def _day_heading(self, day): 1235 1236 """ 1237 Generate a heading for 'day' of the following form: 1238 1239 <label class="day day-20150203" for="day-20150203">Tuesday, 3 February 2015</label> 1240 """ 1241 1242 page = self.page 1243 daystr = format_datetime(day) 1244 value, identifier = self._day_value_and_identifier(day) 1245 page.label(self.format_date(day, "full"), class_="day day-%s" % daystr, for_=identifier) 1246 1247 def _time_point(self, point, endpoint): 1248 1249 """ 1250 Generate headings for the 'point' to 'endpoint' period of the following 1251 form: 1252 1253 <label class="timepoint day-20150203" for="slot-20150203T090000-20150203T100000">09:00:00 CET</label> 1254 <span class="endpoint">10:00:00 CET</span> 1255 """ 1256 1257 page = self.page 1258 tzid = self.get_tzid() 1259 daystr = format_datetime(point.date()) 1260 value, identifier = self._slot_value_and_identifier(point, endpoint) 1261 slots = self.env.get_args().get("slot", []) 1262 self._slot_selector(value, identifier, slots) 1263 page.label(self.format_time(point, "long"), class_="timepoint day-%s" % daystr, for_=identifier) 1264 page.span(self.format_time(endpoint or get_end_of_day(point, tzid), "long"), class_="endpoint") 1265 1266 def _slot_selector(self, value, identifier, slots): 1267 reset = self.env.get_args().has_key("reset") 1268 page = self.page 1269 if not reset and value in slots: 1270 page.input(name="slot", type="checkbox", value=value, id=identifier, class_="newevent selector", checked="checked") 1271 else: 1272 page.input(name="slot", type="checkbox", value=value, id=identifier, class_="newevent selector") 1273 1274 def _empty_slot(self, point, endpoint): 1275 page = self.page 1276 value, identifier = self._slot_value_and_identifier(point, endpoint) 1277 page.label("Select/deselect period", class_="newevent popup", for_=identifier) 1278 1279 def _day_value_and_identifier(self, day): 1280 value = "%s-" % format_datetime(day) 1281 identifier = "day-%s" % value 1282 return value, identifier 1283 1284 def _slot_value_and_identifier(self, point, endpoint): 1285 value = "%s-%s" % (format_datetime(point), endpoint and format_datetime(endpoint) or "") 1286 identifier = "slot-%s" % value 1287 return value, identifier 1288 1289 def _show_menu(self, name, value, items): 1290 page = self.page 1291 values = self.env.get_args().get(name, [value]) 1292 page.select(name=name) 1293 for v, label in items: 1294 if v in values: 1295 page.option(label, value=v, selected="selected") 1296 else: 1297 page.option(label, value=v) 1298 page.select.close() 1299 1300 # Incoming HTTP request direction. 1301 1302 def select_action(self): 1303 1304 "Select the desired action and show the result." 1305 1306 path_info = self.env.get_path_info().strip("/") 1307 1308 if not path_info: 1309 self.show_calendar() 1310 elif self.show_object(path_info): 1311 pass 1312 else: 1313 self.no_page() 1314 1315 def __call__(self): 1316 1317 "Interpret a request and show an appropriate response." 1318 1319 if not self.user: 1320 self.no_user() 1321 else: 1322 self.select_action() 1323 1324 # Write the headers and actual content. 1325 1326 print >>self.out, "Content-Type: text/html; charset=%s" % self.encoding 1327 print >>self.out 1328 self.out.write(unicode(self.page).encode(self.encoding)) 1329 1330 if __name__ == "__main__": 1331 Manager()() 1332 1333 # vim: tabstop=4 expandtab shiftwidth=4