4 * Functions which handle calendar objects and their processing/display.
14 #include <sys/types.h>
16 #include <sys/socket.h>
18 #include <netinet/in.h>
28 #include "webserver.h"
30 #ifndef WEBCIT_WITH_CALENDAR_SERVICE
33 * Handler stubs for builds with no calendar library available
35 void cal_process_attachment(char *part_source, long msgnum, char *cal_partnum) {
37 wprintf("<I>This message contains calendaring/scheduling information,"
38 " but support for calendars is not available on this "
39 "particular system. Please ask your system administrator to "
40 "install a new version of the Citadel web service with "
41 "calendaring enabled.</I><br />\n"
46 void display_calendar(long msgnum) {
48 "Cannot display calendar item. You are seeing this error "
49 "because your WebCit service has not been installed with "
50 "calendar support. Please contact your system administrator."
54 void display_task(long msgnum) {
56 "Cannot display to-do item. You are seeing this error "
57 "because your WebCit service has not been installed with "
58 "calendar support. Please contact your system administrator."
62 #else /* WEBCIT_WITH_CALENDAR_SERVICE */
65 /****** End of handler stubs. Everything below this line is real. ******/
71 * Process a calendar object
72 * ...at this point it's already been deserialized by cal_process_attachment()
75 void cal_process_object(icalcomponent *cal,
81 icalproperty *method = NULL;
82 icalproperty_method the_method = ICAL_METHOD_NONE;
84 struct icaltimetype t;
87 char conflict_name[SIZ];
90 /* Leading HTML for the display of this object */
91 if (recursion_level == 0) {
92 wprintf("<CENTER><TABLE border=0>\n");
95 /* Look for a method */
96 method = icalcomponent_get_first_property(cal, ICAL_METHOD_PROPERTY);
98 /* See what we need to do with this */
100 the_method = icalproperty_get_method(method);
102 case ICAL_METHOD_REQUEST:
103 wprintf("<TR><TD COLSPAN=2>\n"
105 "SRC=\"/static/vcalendar.gif\">"
107 "<B>Meeting invitation</B>"
111 case ICAL_METHOD_REPLY:
112 wprintf("<TR><TD COLSPAN=2>\n"
114 "SRC=\"/static/vcalendar.gif\">"
116 "<B>Attendee's reply to your invitation</B>"
120 case ICAL_METHOD_PUBLISH:
121 wprintf("<TR><TD COLSPAN=2>\n"
123 "SRC=\"/static/vcalendar.gif\">"
125 "<B>Published event</B>"
130 wprintf("<TR><TD COLSPAN=2>"
131 "I don't know what to do with this.</TD></TR>"
137 p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
139 wprintf("<TR><TD><B>Summary:</B></TD><TD>");
140 escputs((char *)icalproperty_get_comment(p));
141 wprintf("</TD></TR>\n");
144 p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
146 wprintf("<TR><TD><B>Location:</B></TD><TD>");
147 escputs((char *)icalproperty_get_comment(p));
148 wprintf("</TD></TR>\n");
152 * Only show start/end times if we're actually looking at the VEVENT
153 * component. Otherwise it shows bogus dates for things like timezone.
155 if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
157 p = icalcomponent_get_first_property(cal,
158 ICAL_DTSTART_PROPERTY);
160 t = icalproperty_get_dtstart(p);
163 wprintf("<TR><TD><B>Date:"
165 "%s %d, %d</TD></TR>",
171 tt = icaltime_as_timet(t);
173 wprintf("<TR><TD><B>Starting date/time:"
180 p = icalcomponent_get_first_property(cal, ICAL_DTEND_PROPERTY);
182 t = icalproperty_get_dtend(p);
183 tt = icaltime_as_timet(t);
185 wprintf("<TR><TD><B>Ending date/time:</B></TD><TD>"
192 p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
194 wprintf("<TR><TD><B>Description:</B></TD><TD>");
195 escputs((char *)icalproperty_get_comment(p));
196 wprintf("</TD></TR>\n");
199 /* If the component has attendees, iterate through them. */
200 for (p = icalcomponent_get_first_property(cal, ICAL_ATTENDEE_PROPERTY); (p != NULL); p = icalcomponent_get_next_property(cal, ICAL_ATTENDEE_PROPERTY)) {
201 wprintf("<TR><TD><B>Attendee:</B></TD><TD>");
202 strcpy(buf, icalproperty_get_attendee(p));
203 if (!strncasecmp(buf, "MAILTO:", 7)) {
205 /* screen name or email address */
206 strcpy(buf, &buf[7]);
211 /* participant status */
212 partstat_as_string(buf, p);
215 wprintf("</TD></TR>\n");
218 /* If the component has subcomponents, recurse through them. */
219 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
221 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
222 /* Recursively process subcomponent */
223 cal_process_object(c, recursion_level+1, msgnum, cal_partnum);
226 /* If this is a REQUEST, display conflicts and buttons */
227 if (the_method == ICAL_METHOD_REQUEST) {
229 /* Check for conflicts */
230 lprintf(9, "Checking server calendar for conflicts...\n");
231 serv_printf("ICAL conflicts|%ld|%s|", msgnum, cal_partnum);
234 while (serv_gets(buf), strcmp(buf, "000")) {
235 extract(conflict_name, buf, 3);
236 is_update = extract_int(buf, 4);
237 wprintf("<TR><TD><B><I>%s</I></B></TD>"
248 "This is an update of" :
249 "This event would conflict with"
253 escputs(conflict_name);
254 wprintf(""</I> "
255 "which is already in your calendar."
259 lprintf(9, "...done.\n");
261 /* Display the Accept/Decline buttons */
262 wprintf("<TR><TD COLSPAN=2>"
263 "<FORM METHOD=\"GET\" "
264 "ACTION=\"/respond_to_request\">\n"
265 "<INPUT TYPE=\"submit\" NAME=\"sc\" "
266 "VALUE=\"Accept\">\n"
268 "<INPUT TYPE=\"submit\" NAME=\"sc\" "
269 "VALUE=\"Tentative\">\n"
271 "<INPUT TYPE=\"submit\" NAME=\"sc\" "
272 "VALUE=\"Decline\">\n"
273 "<INPUT TYPE=\"hidden\" NAME=\"msgnum\" "
275 "<INPUT TYPE=\"hidden\" NAME=\"cal_partnum\" "
284 /* If this is a REPLY, display update button */
285 if (the_method == ICAL_METHOD_REPLY) {
288 * In the future, if we want to validate this object before
289 * continuing, we can do it this way:
290 serv_printf("ICAL whatever|%ld|%s|", msgnum, cal_partnum);
295 /* Display the update buttons */
296 wprintf("<TR><TD COLSPAN=2>"
297 "Click <i>Update</i> to accept this reply and "
298 "update your calendar."
299 "<FORM METHOD=\"GET\" "
300 "ACTION=\"/handle_rsvp\">\n"
301 "<INPUT TYPE=\"submit\" NAME=\"sc\" "
302 "VALUE=\"Update\">\n"
304 "<INPUT TYPE=\"submit\" NAME=\"sc\" "
305 "VALUE=\"Ignore\">\n"
306 "<INPUT TYPE=\"hidden\" NAME=\"msgnum\" "
308 "<INPUT TYPE=\"hidden\" NAME=\"cal_partnum\" "
317 /* Trailing HTML for the display of this object */
318 if (recursion_level == 0) {
320 wprintf("</TR></TABLE></CENTER>\n");
326 * Deserialize a calendar object in a message so it can be processed.
327 * (This is the main entry point for these things)
329 void cal_process_attachment(char *part_source, long msgnum, char *cal_partnum) {
332 cal = icalcomponent_new_from_string(part_source);
335 wprintf("Error parsing calendar object<br />\n");
340 cal_process_object(cal, 0, msgnum, cal_partnum);
342 /* Free the memory we obtained from libical's constructor */
343 icalcomponent_free(cal);
350 * Respond to a meeting request
352 void respond_to_request(void) {
355 output_headers(1, 1, 2, 0, 0, 0, 0);
357 wprintf("<div id=\"banner\">\n");
358 wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#444455\"><TR><TD>"
359 "<SPAN CLASS=\"titlebar\">Respond to meeting request</SPAN>"
360 "</TD></TR></TABLE>\n"
362 wprintf("</div>\n<div id=\"content\">\n");
364 serv_printf("ICAL respond|%s|%s|%s|",
372 wprintf("<TABLE BORDER=0><TR><TD>"
373 "<IMG SRC=\"static/vcalendar.gif\" ALIGN=CENTER>"
376 if (!strcasecmp(bstr("sc"), "accept")) {
377 wprintf("You have accepted this meeting invitation. "
378 "It has been entered into your calendar, "
380 } else if (!strcasecmp(bstr("sc"), "tentative")) {
381 wprintf("You have tentatively accepted this meeting invitation. "
382 "It has been 'pencilled in' to your calendar, "
384 } else if (!strcasecmp(bstr("sc"), "decline")) {
385 wprintf("You have declined this meeting invitation. "
386 "It has <b>not</b> been entered into your calendar, "
389 wprintf("and a reply has been sent to the meeting organizer."
390 "</TD></TR></TABLE>\n"
393 wprintf("<IMG SRC=\"static/error.gif\" ALIGN=CENTER>"
397 wprintf("<A HREF=\"/dotskip?room=");
398 urlescputs(WC->wc_roomname);
399 wprintf("\"><br />Return to messages</A><br />\n");
407 * Handle an incoming RSVP
409 void handle_rsvp(void) {
412 output_headers(1, 1, 2, 0, 0, 0, 0);
414 wprintf("<div id=\"banner\">\n");
415 wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#444455\"><TR><TD>"
416 "<SPAN CLASS=\"titlebar\">"
417 "Update your calendar with this RSVP</SPAN>"
418 "</TD></TR></TABLE>\n"
419 "</div>\n<div id=\"content\">\n"
422 serv_printf("ICAL handle_rsvp|%s|%s|%s|",
430 wprintf("<TABLE BORDER=0><TR><TD>"
431 "<IMG SRC=\"static/vcalendar.gif\" ALIGN=CENTER>"
434 if (!strcasecmp(bstr("sc"), "update")) {
435 wprintf("Your calendar has been updated "
436 "to reflect this RSVP."
438 } else if (!strcasecmp(bstr("sc"), "ignore")) {
439 wprintf("You have chosen to ignore this RSVP. "
440 "Your calendar has <b>not</b> been updated."
443 wprintf("</TD></TR></TABLE>\n"
446 wprintf("<IMG SRC=\"static/error.gif\" ALIGN=CENTER>"
450 wprintf("<A HREF=\"/dotskip?room=");
451 urlescputs(WC->wc_roomname);
452 wprintf("\"><br />Return to messages</A><br />\n");
460 /*****************************************************************************/
465 * Display handlers for message reading
471 * If we're reading calendar items, just store them for now. We have to
472 * sort and re-output them later when we draw the calendar.
474 void display_individual_cal(icalcomponent *cal, long msgnum) {
478 WC->disp_cal = realloc(WC->disp_cal,
479 (sizeof(struct disp_cal) * WC->num_cal) );
480 WC->disp_cal[WC->num_cal - 1].cal = icalcomponent_new_clone(cal);
482 WC->disp_cal[WC->num_cal - 1].cal_msgnum = msgnum;
488 * Display a task by itself (for editing)
491 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
492 icalcomponent *vtodo;
494 struct icaltimetype t;
496 int created_new_vtodo = 0;
500 if (supplied_vtodo != NULL) {
501 vtodo = supplied_vtodo;
503 /* If we're looking at a fully encapsulated VCALENDAR
504 * rather than a VTODO component, attempt to use the first
505 * relevant VTODO subcomponent. If there is none, the
506 * NULL returned by icalcomponent_get_first_component() will
507 * tell the next iteration of this function to create a
510 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
511 display_edit_individual_task(
512 icalcomponent_get_first_component(
513 vtodo, ICAL_VTODO_COMPONENT
520 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
521 created_new_vtodo = 1;
524 output_headers(1, 1, 2, 0, 0, 0, 0);
525 wprintf("<div id=\"banner\">\n"
526 "<TABLE WIDTH=100%% BORDER=0 BGCOLOR=\"#444455\"><TR><TD>"
527 "<SPAN CLASS=\"titlebar\">Edit task</SPAN>"
528 "</TD></TR></TABLE>\n"
529 "</div>\n<div id=\"content\">\n"
532 do_template("beginbox_nt");
534 wprintf("<FORM METHOD=\"POST\" ACTION=\"/save_task\">\n");
535 wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
538 wprintf("<TABLE border=0>\n");
540 wprintf("<TR><TD>Summary:</TD><TD>"
541 "<INPUT TYPE=\"text\" NAME=\"summary\" "
542 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
543 p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
545 escputs((char *)icalproperty_get_comment(p));
547 wprintf("\"></TD></TR>\n");
549 wprintf("<TR><TD>Start date:</TD><TD>");
550 p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
552 t = icalproperty_get_dtstart(p);
555 t = icaltime_from_timet(now, 0);
557 display_icaltimetype_as_webform(&t, "dtstart");
558 wprintf("</TD></TR>\n");
560 wprintf("<TR><TD>Due date:</TD><TD>");
561 p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
563 t = icalproperty_get_due(p);
566 t = icaltime_from_timet(now, 0);
568 display_icaltimetype_as_webform(&t, "due");
569 wprintf("</TD></TR>\n");
570 wprintf("<TR><TD>Description:</TD><TD>");
571 wprintf("<TEXTAREA NAME=\"description\" wrap=soft "
572 "ROWS=10 COLS=80 WIDTH=80>\n"
574 p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
576 escputs((char *)icalproperty_get_comment(p));
578 wprintf("</TEXTAREA></TD></TR></TABLE>\n");
581 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Save\">"
583 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Delete\">\n"
585 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Cancel\">\n"
589 wprintf("</FORM>\n");
591 do_template("endbox");
594 if (created_new_vtodo) {
595 icalcomponent_free(vtodo);
600 * Save an edited task
603 void save_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
605 int delete_existing = 0;
607 icalcomponent *vtodo;
608 int created_new_vtodo = 0;
612 if (supplied_vtodo != NULL) {
613 vtodo = supplied_vtodo;
614 /* If we're looking at a fully encapsulated VCALENDAR
615 * rather than a VTODO component, attempt to use the first
616 * relevant VTODO subcomponent. If there is none, the
617 * NULL returned by icalcomponent_get_first_component() will
618 * tell the next iteration of this function to create a
621 if (icalcomponent_isa(vtodo) == ICAL_VCALENDAR_COMPONENT) {
622 save_individual_task(
623 icalcomponent_get_first_component(
624 vtodo, ICAL_VTODO_COMPONENT
631 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
632 created_new_vtodo = 1;
635 if (!strcasecmp(bstr("sc"), "Save")) {
637 /* Replace values in the component with ones from the form */
639 while (prop = icalcomponent_get_first_property(vtodo,
640 ICAL_SUMMARY_PROPERTY), prop != NULL) {
641 icalcomponent_remove_property(vtodo, prop);
642 icalproperty_free(prop);
644 icalcomponent_add_property(vtodo,
645 icalproperty_new_summary(bstr("summary")));
647 while (prop = icalcomponent_get_first_property(vtodo,
648 ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
649 icalcomponent_remove_property(vtodo, prop);
650 icalproperty_free(prop);
652 icalcomponent_add_property(vtodo,
653 icalproperty_new_description(bstr("description")));
655 while (prop = icalcomponent_get_first_property(vtodo,
656 ICAL_DTSTART_PROPERTY), prop != NULL) {
657 icalcomponent_remove_property(vtodo, prop);
658 icalproperty_free(prop);
660 icalcomponent_add_property(vtodo,
661 icalproperty_new_dtstart(
662 icaltime_from_webform("dtstart")
666 while (prop = icalcomponent_get_first_property(vtodo,
667 ICAL_DUE_PROPERTY), prop != NULL) {
668 icalcomponent_remove_property(vtodo, prop);
669 icalproperty_free(prop);
671 icalcomponent_add_property(vtodo,
672 icalproperty_new_due(
673 icaltime_from_webform("due")
677 /* Give this task a UID if it doesn't have one. */
678 lprintf(9, "Give this task a UID if it doesn't have one.\n");
679 if (icalcomponent_get_first_property(vtodo,
680 ICAL_UID_PROPERTY) == NULL) {
682 icalcomponent_add_property(vtodo,
683 icalproperty_new_uid(buf)
687 /* Increment the sequence ID */
688 lprintf(9, "Increment the sequence ID\n");
689 while (prop = icalcomponent_get_first_property(vtodo,
690 ICAL_SEQUENCE_PROPERTY), (prop != NULL) ) {
691 i = icalproperty_get_sequence(prop);
692 lprintf(9, "Sequence was %d\n", i);
693 if (i > sequence) sequence = i;
694 icalcomponent_remove_property(vtodo, prop);
695 icalproperty_free(prop);
698 lprintf(9, "New sequence is %d. Adding...\n", sequence);
699 icalcomponent_add_property(vtodo,
700 icalproperty_new_sequence(sequence)
704 /* Serialize it and save it to the message base */
705 serv_puts("ENT0 1|||4");
708 serv_puts("Content-type: text/calendar");
710 serv_puts(icalcomponent_as_ical_string(vtodo));
713 /* Probably not necessary; the server will see the UID
714 * of the object and delete the old one anyway, but
722 * If the user clicked 'Delete' then explicitly delete the message.
724 if (!strcasecmp(bstr("sc"), "Delete")) {
728 if ( (delete_existing) && (msgnum > 0L) ) {
729 serv_printf("DELE %ld", atol(bstr("msgnum")));
733 if (created_new_vtodo) {
734 icalcomponent_free(vtodo);
737 /* Go back to the task list */
744 * Code common to all display handlers. Given a message number and a MIME
745 * type, we load the message and hunt for that MIME type. If found, we load
746 * the relevant part, deserialize it into a libical component, filter it for
747 * the requested object type, and feed it to the specified handler.
750 void display_using_handler(long msgnum,
752 icalcomponent_kind which_kind,
753 void (*callback)(icalcomponent *, long)
756 char mime_partnum[SIZ];
757 char mime_filename[SIZ];
758 char mime_content_type[SIZ];
759 char mime_disposition[SIZ];
761 char relevant_partnum[SIZ];
762 char *relevant_source = NULL;
763 icalcomponent *cal, *c;
765 sprintf(buf, "MSG0 %ld|1", msgnum); /* ask for headers only */
768 if (buf[0] != '1') return;
770 while (serv_gets(buf), strcmp(buf, "000")) {
771 if (!strncasecmp(buf, "part=", 5)) {
772 extract(mime_filename, &buf[5], 1);
773 extract(mime_partnum, &buf[5], 2);
774 extract(mime_disposition, &buf[5], 3);
775 extract(mime_content_type, &buf[5], 4);
776 mime_length = extract_int(&buf[5], 5);
778 if (!strcasecmp(mime_content_type, "text/calendar")) {
779 strcpy(relevant_partnum, mime_partnum);
785 if (strlen(relevant_partnum) > 0) {
786 relevant_source = load_mimepart(msgnum, relevant_partnum);
787 if (relevant_source != NULL) {
789 cal = icalcomponent_new_from_string(relevant_source);
794 /* Simple components of desired type */
795 if (icalcomponent_isa(cal) == which_kind) {
796 callback(cal, msgnum);
799 /* Subcomponents of desired type */
800 for (c = icalcomponent_get_first_component(cal,
803 c = icalcomponent_get_next_component(cal,
807 icalcomponent_free(cal);
809 free(relevant_source);
815 void display_calendar(long msgnum) {
816 display_using_handler(msgnum, "text/calendar",
817 ICAL_VEVENT_COMPONENT,
818 display_individual_cal);
821 void display_task(long msgnum) {
822 display_using_handler(msgnum, "text/calendar",
823 ICAL_VTODO_COMPONENT,
824 display_individual_cal);
827 void display_edit_task(void) {
830 /* Force change the room if we have to */
831 if (strlen(bstr("taskrm")) > 0) {
832 gotoroom(bstr("taskrm"));
835 msgnum = atol(bstr("msgnum"));
838 display_using_handler(msgnum, "text/calendar",
839 ICAL_VTODO_COMPONENT,
840 display_edit_individual_task);
844 display_edit_individual_task(NULL, 0L);
848 void save_task(void) {
851 msgnum = atol(bstr("msgnum"));
853 display_using_handler(msgnum, "text/calendar",
854 ICAL_VTODO_COMPONENT,
855 save_individual_task);
858 save_individual_task(NULL, 0L);
862 void display_edit_event(void) {
865 msgnum = atol(bstr("msgnum"));
868 display_using_handler(msgnum, "text/calendar",
869 ICAL_VEVENT_COMPONENT,
870 display_edit_individual_event);
874 display_edit_individual_event(NULL, 0L);
878 void save_event(void) {
881 msgnum = atol(bstr("msgnum"));
884 display_using_handler(msgnum, "text/calendar",
885 ICAL_VEVENT_COMPONENT,
886 save_individual_event);
889 save_individual_event(NULL, 0L);
898 * freebusy display (for client software)
900 void do_freebusy(char *req) {
905 extract_token(who, req, 1, ' ');
906 if (!strncasecmp(who, "/freebusy/", 10)) {
907 strcpy(who, &who[10]);
911 if ( (!strcasecmp(&who[strlen(who)-4], ".vcf"))
912 || (!strcasecmp(&who[strlen(who)-4], ".vfb")) ) {
913 who[strlen(who)-4] = 0;
916 lprintf(9, "freebusy requested for <%s>\n", who);
917 serv_printf("ICAL freebusy|%s", who);
921 wprintf("HTTP/1.0 404 %s\n", &buf[4]);
922 output_headers(0, 0, 0, 0, 0, 0, 0);
923 wprintf("Content-Type: text/plain\n");
925 wprintf("%s\n", &buf[4]);
929 fb = read_server_text();
930 http_transmit_thing(fb, strlen(fb), "text/calendar", 0);
936 #endif /* WEBCIT_WITH_CALENDAR_SERVICE */