]> code.citadel.org Git - citadel.git/blobdiff - webcit/calendar.c
serv_rssclient.c: style update
[citadel.git] / webcit / calendar.c
diff --git a/webcit/calendar.c b/webcit/calendar.c
deleted file mode 100644 (file)
index f0f34ef..0000000
+++ /dev/null
@@ -1,890 +0,0 @@
-// Functions which handle calendar objects and their processing/display.
-//
-// Copyright (c) 1996-2022 by the citadel.org team
-//
-// This program is open source software.  You can redistribute it and/or
-// modify it under the terms of the GNU General Public License, version 3.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-
-#include "webcit.h"
-#include "webserver.h"
-#include "calendar.h"
-
-// Process a calendar object.  At this point it's already been deserialized by cal_process_attachment()
-//
-// cal:                        the calendar object
-// recursion_level:    Number of times we've recursed into this function
-// msgnum:             Message number on the Citadel server
-// cal_partnum:                MIME part number within that message containing the calendar object
-void cal_process_object(StrBuf *Target,
-                       icalcomponent *cal,
-                       int recursion_level,
-                       long msgnum,
-                       const char *cal_partnum) 
-{
-       icalcomponent *c;
-       icalproperty *method = NULL;
-       icalproperty_method the_method = ICAL_METHOD_NONE;
-       icalproperty *p;
-       struct icaltimetype t;
-       time_t tt;
-       char buf[256];
-       char conflict_name[256];
-       char conflict_message[256];
-       int is_update = 0;
-       char divname[32];
-       static int divcount = 0;
-       const char *ch;
-
-       sprintf(divname, "rsvp%04x", ++divcount);
-
-       // Convert timezones to something easy to display.
-       // It's safe to do this in memory because we're only changing it on the
-       // display side -- when we tell the server to do something with the object,
-       // the server will be working with its original copy in the database.
-       if ((cal) && (recursion_level == 0)) {
-               ical_dezonify(cal);
-       }
-
-       // Leading HTML for the display of this object
-       if (recursion_level == 0) {
-               StrBufAppendPrintf(Target, "<div class=\"mimepart\">\n");
-       }
-
-       // Look for a method
-       method = icalcomponent_get_first_property(cal, ICAL_METHOD_PROPERTY);
-
-       // See what we need to do with this
-       if (method != NULL) {
-               char *title;
-               the_method = icalproperty_get_method(method);
-
-               StrBufAppendPrintf(Target, "<div id=\"%s_title\">", divname);
-               StrBufAppendPrintf(Target, "<img src=\"static/webcit_icons/essen/32x32/calendar.png\">");
-               StrBufAppendPrintf(Target, "<span>");
-               switch(the_method) {
-               case ICAL_METHOD_REQUEST:
-                       title = _("Meeting invitation");
-                       break;
-               case ICAL_METHOD_REPLY:
-                       title = _("Attendee's reply to your invitation");
-                       break;
-               case ICAL_METHOD_PUBLISH:
-                       title = _("Published event");
-                       break;
-               default:
-                       title = _("This is an unknown type of calendar item.");
-                       break;
-               }
-               StrBufAppendPrintf(Target, "</span>");
-
-               StrBufAppendPrintf(Target, "&nbsp;&nbsp;%s",title);
-               StrBufAppendPrintf(Target, "</div>");
-       }
-
-       StrBufAppendPrintf(Target, "<dl>");
-       p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
-       if (p != NULL) {
-               StrBufAppendPrintf(Target, "<dt>");
-               StrBufAppendPrintf(Target, _("Summary:"));
-               StrBufAppendPrintf(Target, "</dt><dd>");
-               StrEscAppend(Target, NULL, (char *)icalproperty_get_comment(p), 0, 0);
-               StrBufAppendPrintf(Target, "</dd>\n");
-       }
-
-       p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
-       if (p != NULL) {
-               StrBufAppendPrintf(Target, "<dt>");
-               StrBufAppendPrintf(Target, _("Location:"));
-               StrBufAppendPrintf(Target, "</dt><dd>");
-               StrEscAppend(Target, NULL, (char *)icalproperty_get_comment(p), 0, 0);
-               StrBufAppendPrintf(Target, "</dd>\n");
-       }
-
-       // Only show start/end times if we're actually looking at the VEVENT
-       // component.  Otherwise it shows bogus dates for things like timezone.
-       if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
-
-               p = icalcomponent_get_first_property(cal, ICAL_DTSTART_PROPERTY);
-               if (p != NULL) {
-                       t = icalproperty_get_dtstart(p);
-
-                       if (t.is_date) {
-                               struct tm d_tm;
-                               char d_str[32];
-                               memset(&d_tm, 0, sizeof d_tm);
-                               d_tm.tm_year = t.year - 1900;
-                               d_tm.tm_mon = t.month - 1;
-                               d_tm.tm_mday = t.day;
-                               wc_strftime(d_str, sizeof d_str, "%x", &d_tm);
-                               StrBufAppendPrintf(Target, "<dt>");
-                               StrBufAppendPrintf(Target, _("Date:"));
-                               StrBufAppendPrintf(Target, "</dt><dd>%s</dd>", d_str);
-                       }
-                       else {
-                               tt = icaltime_as_timet(t);
-                               webcit_fmt_date(buf, 256, tt, DATEFMT_FULL);
-                               StrBufAppendPrintf(Target, "<dt>");
-                               StrBufAppendPrintf(Target, _("Starting date/time:"));
-                               StrBufAppendPrintf(Target, "</dt><dd>%s</dd>", buf);
-                       }
-               }
-       
-               p = icalcomponent_get_first_property(cal, ICAL_DTEND_PROPERTY);
-               if (p != NULL) {
-                       t = icalproperty_get_dtend(p);
-                       tt = icaltime_as_timet(t);
-                       webcit_fmt_date(buf, 256, tt, DATEFMT_FULL);
-                       StrBufAppendPrintf(Target, "<dt>");
-                       StrBufAppendPrintf(Target, _("Ending date/time:"));
-                       StrBufAppendPrintf(Target, "</dt><dd>%s</dd>", buf);
-               }
-
-       }
-
-       p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
-       if (p != NULL) {
-               StrBufAppendPrintf(Target, "<dt>");
-               StrBufAppendPrintf(Target, _("Description:"));
-               StrBufAppendPrintf(Target, "</dt><dd>");
-               StrEscAppend(Target, NULL, (char *)icalproperty_get_comment(p), 0, 0);
-               StrBufAppendPrintf(Target, "</dd>\n");
-       }
-
-       if (icalcomponent_get_first_property(cal, ICAL_RRULE_PROPERTY)) {
-               // Unusual string syntax used here in order to re-use existing translations
-               StrBufAppendPrintf(Target, "<dt>%s:</dt><dd>%s.</dd>\n",
-                       _("Recurrence"),
-                       _("This is a recurring event")
-               );
-       }
-
-       // If the component has attendees, iterate through them.
-       for (p = icalcomponent_get_first_property(cal, ICAL_ATTENDEE_PROPERTY); 
-            (p != NULL); 
-            p = icalcomponent_get_next_property(cal, ICAL_ATTENDEE_PROPERTY)) {
-               StrBufAppendPrintf(Target, "<dt>");
-               StrBufAppendPrintf(Target, _("Attendee:"));
-               StrBufAppendPrintf(Target, "</dt><dd>");
-               ch = icalproperty_get_attendee(p);
-               if ((ch != NULL) && !strncasecmp(ch, "MAILTO:", 7)) {
-
-                       // screen name or email address
-                       safestrncpy(buf, ch + 7, sizeof(buf));
-                       string_trim(buf);
-                       StrEscAppend(Target, NULL, buf, 0, 0);
-                       StrBufAppendPrintf(Target, " ");
-
-                       // participant status
-                       partstat_as_string(buf, p);
-                       StrEscAppend(Target, NULL, buf, 0, 0);
-               }
-               StrBufAppendPrintf(Target, "</dd>\n");
-       }
-
-       // If the component has subcomponents, recurse through them.
-       for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
-               (c != 0);
-               c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)
-       ) {
-               // Recursively process subcomponent
-               cal_process_object(Target, c, recursion_level+1, msgnum, cal_partnum);
-       }
-
-       // If this is a REQUEST, display conflicts and buttons
-       if (the_method == ICAL_METHOD_REQUEST) {
-
-               // Check for conflicts
-               syslog(LOG_DEBUG, "Checking server calendar for conflicts...");
-               serv_printf("ICAL conflicts|%ld|%s|", msgnum, cal_partnum);
-               serv_getln(buf, sizeof buf);
-               if (buf[0] == '1') {
-                       while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
-                               extract_token(conflict_name, buf, 3, '|', sizeof conflict_name);
-                               is_update = extract_int(buf, 4);
-
-                               if (is_update) {
-                                       snprintf(conflict_message, sizeof conflict_message,
-                                                _("This is an update of '%s' which is already in your calendar."), conflict_name);
-                               }
-                               else {
-                                       snprintf(conflict_message, sizeof conflict_message,
-                                                _("This event would conflict with '%s' which is already in your calendar."), conflict_name);
-                               }
-
-                               StrBufAppendPrintf(Target, "<dt>%s",
-                                       (is_update ?
-                                        _("Update:") :
-                                        _("CONFLICT:")
-                                               )
-                                       );
-                               StrBufAppendPrintf(Target, "</dt><dd>");
-                               StrEscAppend(Target, NULL, conflict_message, 0, 0);
-                               StrBufAppendPrintf(Target, "</dd>\n");
-                       }
-               }
-               syslog(LOG_DEBUG, "...done.\n");
-
-               StrBufAppendPrintf(Target, "</dl>");
-
-               // Display the Accept/Decline buttons
-               StrBufAppendPrintf(Target, "<p id=\"%s_question\">"
-                       "%s "
-                       "&nbsp;&nbsp;&nbsp;<span class=\"button_link\"> "
-                       "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Accept');\">%s</a>"
-                       "</span>&nbsp;&nbsp;&nbsp;<span class=\"button_link\">"
-                       "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Tentative');\">%s</a>"
-                       "</span>&nbsp;&nbsp;&nbsp;<span class=\"button_link\">"
-                       "<a href=\"javascript:RespondToInvitation('%s_question','%s_title','%ld','%s','Decline');\">%s</a>"
-                       "</span></p>\n",
-                       divname,
-                       _("How would you like to respond to this invitation?"),
-                       divname, divname, msgnum, cal_partnum, _("Accept"),
-                       divname, divname, msgnum, cal_partnum, _("Tentative"),
-                       divname, divname, msgnum, cal_partnum, _("Decline")
-                       );
-
-       }
-
-       // If this is a REPLY, display update button
-       if (the_method == ICAL_METHOD_REPLY) {
-
-               // Display the update buttons
-               StrBufAppendPrintf(Target, "<p id=\"%s_question\" >"
-                       "%s "
-                       "&nbsp;&nbsp;&nbsp;<span class=\"button_link\"> "
-                       "<a href=\"javascript:HandleRSVP('%s_question','%s_title','%ld','%s','Update');\">%s</a>"
-                       "</span>&nbsp;&nbsp;&nbsp;<span class=\"button_link\">"
-                       "<a href=\"javascript:HandleRSVP('%s_question','%s_title','%ld','%s','Ignore');\">%s</a>"
-                       "</span></p>\n",
-                       divname,
-                       _("Click <i>Update</i> to accept this reply and update your calendar."),
-                       divname, divname, msgnum, cal_partnum, _("Update"),
-                       divname, divname, msgnum, cal_partnum, _("Ignore")
-                       );
-       
-       }
-       
-       // Trailing HTML for the display of this object
-       if (recursion_level == 0) {
-               StrBufAppendPrintf(Target, "<p>&nbsp;</p></div>\n");
-       }
-}
-
-
-// Deserialize a calendar object in a message so it can be displayed.
-void cal_process_attachment(wc_mime_attachment *Mime) {
-       icalcomponent *cal;
-
-       cal = icalcomponent_new_from_string(ChrPtr(Mime->Data));
-       FlushStrBuf(Mime->Data);
-       if (cal == NULL) {
-               StrBufAppendPrintf(Mime->Data, _("There was an error parsing this calendar item."));
-               StrBufAppendPrintf(Mime->Data, "<br>\n");
-               return;
-       }
-
-       cal_process_object(Mime->Data, cal, 0, Mime->msgnum, ChrPtr(Mime->PartNum));
-
-       // Free the memory we obtained from libical's constructor
-       icalcomponent_free(cal);
-}
-
-
-// Respond to a meeting request - accept/decline meeting
-void respond_to_request(void) {
-       char buf[1024];
-
-       begin_ajax_response();
-
-       serv_printf("ICAL respond|%s|%s|%s|",
-               bstr("msgnum"),
-               bstr("cal_partnum"),
-               bstr("sc")
-       );
-       serv_getln(buf, sizeof buf);
-
-       if (buf[0] == '2') {
-               wc_printf("<img src=\"static/webcit_icons/essen/32x32/calendar.png\"><span>");
-               if (!strcasecmp(bstr("sc"), "accept")) {
-                       wc_printf(_("You have accepted this meeting invitation.  "
-                               "It has been entered into your calendar.")
-                       );
-               }
-               else if (!strcasecmp(bstr("sc"), "tentative")) {
-                       wc_printf(_("You have tentatively accepted this meeting invitation.  "
-                               "It has been 'pencilled in' to your calendar.")
-                       );
-               }
-               else if (!strcasecmp(bstr("sc"), "decline")) {
-                       wc_printf(_("You have declined this meeting invitation.  "
-                                 "It has <b>not</b> been entered into your calendar.")
-                               );
-               }
-               wc_printf(" ");
-               wc_printf(_("A reply has been sent to the meeting organizer."));
-               wc_printf("</span>");
-       }
-       else {
-               wc_printf("<img align=\"center\" src=\"static/webcit_icons/error.gif\"><span>");
-               wc_printf("%s\n", &buf[4]);
-               wc_printf("</span>");
-       }
-       end_ajax_response();
-}
-
-
-// Handle an incoming RSVP
-void handle_rsvp(void) {
-       char buf[1024];
-
-       begin_ajax_response();
-
-       serv_printf("ICAL handle_rsvp|%s|%s|%s|",
-               bstr("msgnum"),
-               bstr("cal_partnum"),
-               bstr("sc")
-       );
-       serv_getln(buf, sizeof buf);
-
-       if (buf[0] == '2') {
-               wc_printf("<img src=\"static/webcit_icons/calendar.png\"><span>");
-               if (!strcasecmp(bstr("sc"), "update")) {
-                       // Translators: RSVP aka Répondez s'il-vous-plaît is the term 
-                       // that the recipient of an ical-invitation should please 
-                       // answer this request.
-                       wc_printf(_("Your calendar has been updated to reflect this RSVP."));
-               }
-               else if (!strcasecmp(bstr("sc"), "ignore")) {
-                       wc_printf(_("You have chosen to ignore this RSVP. "
-                                 "Your calendar has <b>not</b> been updated.")
-                       );
-               }
-               wc_printf("</span>");
-       }
-       else {
-               wc_printf("<img src=\"static/webcit_icons/error.gif\"><span> %s\n", &buf[4]);
-               wc_printf("</span>");
-       }
-
-       end_ajax_response();
-}
-
-
-// free memory allocated using libical
-void delete_cal(void *vCal) {
-       disp_cal *Cal = (disp_cal*) vCal;
-       icalcomponent_free(Cal->cal);
-       free(Cal->from);
-       free(Cal);
-}
-
-
-// This is the meat-and-bones of the first part of our two-phase calendar display.
-// As we encounter calendar items in messages being read from the server, we break out
-// any iCalendar objects and store them in a hash table.  Later on, the second phase will
-// use this hash table to render the calendar for display.
-void display_individual_cal(icalcomponent *event, long msgnum, char *from, int unread, calview *calv) {
-       icalproperty *ps = NULL;
-       struct icaltimetype dtstart, dtend;
-       struct icaldurationtype dur;
-       wcsession *WCC = WC;
-       disp_cal *Cal;
-       size_t len;
-       time_t final_recurrence = 0;
-       icalcomponent *cptr = NULL;
-
-       // recur variables
-       icalproperty *rrule = NULL;
-       struct icalrecurrencetype recur;
-       icalrecur_iterator *ritr = NULL;
-       struct icaltimetype next;
-       int num_recur = 0;
-       int stop_rr = 0;
-
-       // first and foremost, check for bogosity.  bail if we see no DTSTART property
-       if (icalcomponent_get_first_property(icalcomponent_get_first_component(
-               event, ICAL_VEVENT_COMPONENT), ICAL_DTSTART_PROPERTY) == NULL
-       ) {
-               return;
-       }
-
-       // ok, chances are we've got a live one here.  let's try to figure out where it goes.
-
-       dtstart = icaltime_null_time();
-       dtend = icaltime_null_time();
-       
-       if (WCC->disp_cal_items == NULL) {
-               WCC->disp_cal_items = NewHash(0, Flathash);
-       }
-
-       // Note: anything we do here, we also have to do below for the recurrences.
-       Cal = (disp_cal*) malloc(sizeof(disp_cal));
-       memset(Cal, 0, sizeof(disp_cal));
-       Cal->cal = icalcomponent_new_clone(event);
-
-       // Dezonify and decapsulate at the very last moment
-       ical_dezonify(Cal->cal);
-       if (icalcomponent_isa(Cal->cal) != ICAL_VEVENT_COMPONENT) {
-               cptr = icalcomponent_get_first_component(Cal->cal, ICAL_VEVENT_COMPONENT);
-               if (cptr) {
-                       cptr = icalcomponent_new_clone(cptr);
-                       icalcomponent_free(Cal->cal);
-                       Cal->cal = cptr;
-               }
-       }
-
-       Cal->unread = unread;
-       len = strlen(from);
-       Cal->from = (char*)malloc(len+ 1);
-       memcpy(Cal->from, from, len + 1);
-       Cal->cal_msgnum = msgnum;
-
-       // Precalculate the starting date and time of this event, and store it in our top-level
-       // structure.  Later, when we are rendering the calendar, we can just peek at these values
-       // without having to break apart every calendar item.
-       ps = icalcomponent_get_first_property(Cal->cal, ICAL_DTSTART_PROPERTY);
-       if (ps != NULL) {
-               dtstart = icalproperty_get_dtstart(ps);
-               Cal->event_start = icaltime_as_timet(dtstart);
-       }
-
-       // Do the same for the ending date and time.  It makes the day view much easier to render.
-       ps = icalcomponent_get_first_property(Cal->cal, ICAL_DTEND_PROPERTY);
-       if (ps != NULL) {
-               dtend = icalproperty_get_dtend(ps);
-               Cal->event_end = icaltime_as_timet(dtend);
-       }
-
-       // Store it in the hash list.
-       // syslog(LOG_DEBUG, "INITIAL: %s", ctime(&Cal->event_start));
-       Put(WCC->disp_cal_items, (char*) &Cal->event_start, sizeof(Cal->event_start), Cal, delete_cal);
-
-       //***************************** handle recurring events ******************************
-
-       if (icaltime_is_null_time(dtstart)) return;     /* Can't recur without a start time */
-
-       if (!icaltime_is_null_time(dtend)) {            /* Need duration for recurrences */
-               dur = icaltime_subtract(dtend, dtstart);
-       }
-       else {
-               dur = icaltime_subtract(dtstart, dtstart);
-       }
-
-       /*
-        * Just let libical iterate the recurrence, and keep looping back to the top of this function,
-        * adding new hash entries that all point back to the same msgnum, until either the iteration
-        * stops or some outer bound is reached.  The display code will automatically do the Right Thing.
-        */
-       cptr = event;
-       if (icalcomponent_isa(cptr) != ICAL_VEVENT_COMPONENT) {
-               cptr = icalcomponent_get_first_component(cptr, ICAL_VEVENT_COMPONENT);
-       }
-       if (!cptr) return;
-       ps = icalcomponent_get_first_property(cptr, ICAL_DTSTART_PROPERTY);
-       if (ps == NULL) return;
-       dtstart = icalproperty_get_dtstart(ps);
-       rrule = icalcomponent_get_first_property(cptr, ICAL_RRULE_PROPERTY);
-       if (!rrule) return;
-       recur = icalproperty_get_rrule(rrule);
-       ritr = icalrecur_iterator_new(recur, dtstart);
-       if (!ritr) return;
-
-       while (next = icalrecur_iterator_next(ritr), ((!icaltime_is_null_time(next))&&(!stop_rr)) ) {
-               ++num_recur;
-               if (num_recur > 1) {            /* Skip the first one.  We already did it at the root. */
-                       icalcomponent *cptr;
-
-                       /* Note: anything we do here, we also have to do above for the root event. */
-                       Cal = (disp_cal*) malloc(sizeof(disp_cal));
-                       memset(Cal, 0, sizeof(disp_cal));
-                       Cal->cal = icalcomponent_new_clone(event);
-                       Cal->unread = unread;
-                       len = strlen(from);
-                       Cal->from = (char*)malloc(len+ 1);
-                       memcpy(Cal->from, from, len + 1);
-                       Cal->cal_msgnum = msgnum;
-
-                       if (icalcomponent_isa(Cal->cal) == ICAL_VEVENT_COMPONENT) {
-                               cptr = Cal->cal;
-                       }
-                       else {
-                               cptr = icalcomponent_get_first_component(Cal->cal, ICAL_VEVENT_COMPONENT);
-                       }
-                       if (cptr) {
-
-                               /* Remove any existing DTSTART properties */
-                               while ( ps = icalcomponent_get_first_property(cptr, ICAL_DTSTART_PROPERTY),
-                                       ps != NULL
-                               ) {
-                                       icalcomponent_remove_property(cptr, ps);
-                               }
-
-                               /* Add our shiny new DTSTART property from the iteration */
-                               ps = icalproperty_new_dtstart(next);
-                               icalcomponent_add_property(cptr, ps);
-                               Cal->event_start = icaltime_as_timet(next);
-                               final_recurrence = Cal->event_start;
-
-                               /* Remove any existing DTEND properties */
-                               while (ps = icalcomponent_get_first_property(cptr, ICAL_DTEND_PROPERTY), (ps != NULL)) {
-                                       icalcomponent_remove_property(cptr, ps);
-                               }
-
-                               /* Add our shiny new DTEND property from the iteration */
-                               ps = icalproperty_new_dtend(icaltime_add(next, dur));
-                               icalcomponent_add_property(cptr, ps);
-
-                       }
-
-                       /* Dezonify and decapsulate at the very last moment */
-                       ical_dezonify(Cal->cal);
-                       if (icalcomponent_isa(Cal->cal) != ICAL_VEVENT_COMPONENT) {
-                               cptr = icalcomponent_get_first_component(Cal->cal, ICAL_VEVENT_COMPONENT);
-                               if (cptr) {
-                                       cptr = icalcomponent_new_clone(cptr);
-                                       icalcomponent_free(Cal->cal);
-                                       Cal->cal = cptr;
-                               }
-                       }
-
-                       if (    (Cal->event_start > calv->lower_bound)
-                               && (Cal->event_start < calv->upper_bound)
-                       ) {
-                               /* syslog(LOG_DEBUG, "REPEATS: %s", ctime(&Cal->event_start)); */
-                               Put(WCC->disp_cal_items, 
-                                       (char*) &Cal->event_start,
-                                       sizeof(Cal->event_start), 
-                                       Cal, 
-                                       delete_cal
-                               );
-                       }
-                       else {
-                               delete_cal(Cal);
-                       }
-
-                       /* If an upper bound is set, stop when we go out of scope */
-                       if (final_recurrence > calv->upper_bound) stop_rr = 1;
-               }
-       }
-       icalrecur_iterator_free(ritr);
-       /* syslog(LOG_DEBUG, "Performed %d recurrences; final one is %s", num_recur, ctime(&final_recurrence)); */
-}
-
-
-void process_ical_object(long msgnum, int unread,
-                        char *from, 
-                        char *FlatIcal, 
-                        icalcomponent_kind which_kind,
-                        IcalCallbackFunc CallBack,
-                        calview *calv
-) {
-       icalcomponent *cal, *c;
-
-       cal = icalcomponent_new_from_string(FlatIcal);
-       if (cal != NULL) {
-
-               /* A which_kind of (-1) means just load the whole thing */
-               if (which_kind == (-1)) {
-                       CallBack(cal, msgnum, from, unread, calv);
-               }
-               
-               /* Otherwise recurse and hunt */
-               else {
-                       
-                       /* Simple components of desired type */
-                       if (icalcomponent_isa(cal) == which_kind) {
-                               CallBack(cal, msgnum, from, unread, calv);
-                       }
-                       
-                       /* Subcomponents of desired type */
-                       for (c = icalcomponent_get_first_component(cal, which_kind);
-                            (c != 0);
-                            c = icalcomponent_get_next_component(cal, which_kind)) {
-                               CallBack(c, msgnum, from, unread, calv);
-                       }
-                       
-               }
-               
-               icalcomponent_free(cal);
-       }
-}
-
-// Code common to all icalendar display handlers.  Given a message number and a MIME
-// type, we load the message and hunt for that MIME type.  If found, we load
-// the relevant part, deserialize it into a libical component, filter it for
-// the requested object type, and feed it to the specified handler.
-void load_ical_object(long msgnum, int unread,
-                     icalcomponent_kind which_kind,
-                     IcalCallbackFunc CallBack,
-                     calview *calv,
-                     int RenderAsync
-) {
-       StrBuf *Buf;
-       StrBuf *Data = NULL;
-       const char *bptr;
-       int Done = 0;
-       char from[128] = "";
-       char mime_partnum[256];
-       char mime_filename[256];
-       char mime_content_type[256];
-       char mime_disposition[256];
-       char relevant_partnum[256];
-       char *relevant_source = NULL;
-       int phase = 0;                          /* 0 = citadel headers, 1 = mime headers, 2 = body */
-       char msg4_content_type[256] = "";
-       char msg4_content_encoding[256] = "";
-       int msg4_content_length = 0;
-
-       relevant_partnum[0] = '\0';
-       serv_printf("MSG4 %ld", msgnum);        /* we need the mime headers */
-       Buf = NewStrBuf();
-       StrBuf_ServGetln(Buf);
-       if (GetServerStatus(Buf, NULL) != 1) {
-               FreeStrBuf (&Buf);
-               return;
-       }
-       while (!Done && (StrBuf_ServGetln(Buf)>=0)) {
-               if ( (StrLength(Buf)==3) && 
-                    !strcmp(ChrPtr(Buf), "000")) {
-                       Done = 1;
-                       break;
-               }
-               bptr = ChrPtr(Buf);
-               switch (phase) {
-               case 0:
-                       if (!strncasecmp(bptr, "part=", 5)) {
-                               extract_token(mime_filename, &bptr[5], 1, '|', sizeof mime_filename);
-                               extract_token(mime_partnum, &bptr[5], 2, '|', sizeof mime_partnum);
-                               extract_token(mime_disposition, &bptr[5], 3, '|', sizeof mime_disposition);
-                               extract_token(mime_content_type, &bptr[5], 4, '|', sizeof mime_content_type);
-                               /* do we care? mime_length = */extract_int(&bptr[5], 5);
-
-                               if (  (!strcasecmp(mime_content_type, "text/calendar"))
-                                     || (!strcasecmp(mime_content_type, "application/ics"))
-                                     || (!strcasecmp(mime_content_type, "text/vtodo"))
-                                     || (!strcasecmp(mime_content_type, "text/todo"))
-                                       ) {
-                                       strcpy(relevant_partnum, mime_partnum);
-                               }
-                       }
-                       else if (!strncasecmp(bptr, "from=", 4)) {
-                               extract_token(from, bptr, 1, '=', sizeof(from));
-                       }
-                       else if ((phase == 0) && (!strncasecmp(bptr, "text", 4))) {
-                               phase = 1;
-                       }
-               break;
-               case 1:
-                       if (!IsEmptyStr(bptr)) {
-                               if (!strncasecmp(bptr, "Content-type: ", 14)) {
-                                       safestrncpy(msg4_content_type, &bptr[14], sizeof msg4_content_type);
-                                       string_trim(msg4_content_type);
-                               }
-                               else if (!strncasecmp(bptr, "Content-transfer-encoding: ", 27)) {
-                                       safestrncpy(msg4_content_encoding, &bptr[27], sizeof msg4_content_encoding);
-                                       string_trim(msg4_content_type);
-                               }
-                               else if ((!strncasecmp(bptr, "Content-length: ", 16))) {
-                                       msg4_content_length = atoi(&bptr[16]);
-                               }
-                               break;
-                       }
-                       else {
-                               phase++;
-                               
-                               if ((msg4_content_length > 0)
-                                   && ( !strcasecmp(msg4_content_encoding, "7bit"))
-                                   && ((!strcasecmp(mime_content_type, "text/calendar"))
-                                       || (!strcasecmp(mime_content_type, "application/ics"))
-                                       || (!strcasecmp(mime_content_type, "text/vtodo"))
-                                       || (!strcasecmp(mime_content_type, "text/todo"))
-                                           )
-                                       ) 
-                               {
-                               }
-                       }
-               case 2:
-                       if (Data == NULL)
-                               Data = NewStrBufPlain(NULL, msg4_content_length * 2);
-                       if (msg4_content_length > 0) {
-                               StrBuf_ServGetBLOBBuffered(Data, msg4_content_length);
-                               phase ++;
-                       }
-                       else {
-                               StrBufAppendBuf(Data, Buf, 0);
-                               StrBufAppendBufPlain(Data, "\r\n", 1, 0);
-                       }
-               case 3:
-                       StrBufAppendBuf(Data, Buf, 0);
-               }
-       }
-       FreeStrBuf(&Buf);
-
-       // If MSG4 didn't give us the part we wanted, but we know that we can find it
-       // as one of the other MIME parts, attempt to load it now.
-       if ((Data == NULL) && (!IsEmptyStr(relevant_partnum))) {
-               Data = load_mimepart(msgnum, relevant_partnum);
-       }
-
-       if (Data != NULL) {
-               relevant_source = (char*) ChrPtr(Data);
-               process_ical_object(msgnum, unread,
-                                   from, 
-                                   relevant_source, 
-                                   which_kind,
-                                   CallBack,
-                                   calv);
-       }
-       FreeStrBuf (&Data);
-
-       icalmemory_free_ring();
-}
-
-
-// Display a calendar item
-int calendar_LoadMsgFromServer(SharedMessageStatus *Stat, void **ViewSpecific, message_summary* Msg, int is_new, int i) {
-       calview *c = (calview*) *ViewSpecific;
-       load_ical_object(Msg->msgnum, is_new, (-1), display_individual_cal, c, 1);
-       return 0;
-}
-
-
-// display the editor component for an event
-void display_edit_event(void) {
-       long msgnum = 0L;
-
-       msgnum = lbstr("msgnum");
-       if (msgnum > 0L) {
-               // existing event
-               load_ical_object(msgnum, 0, ICAL_VEVENT_COMPONENT, display_edit_individual_event, NULL, 0);
-       }
-       else {
-               // new event
-               display_edit_individual_event(NULL, 0L, "", 0, NULL);
-       }
-}
-
-
-// save an edited event
-void save_event(void) {
-       long msgnum = 0L;
-
-       msgnum = lbstr("msgnum");
-
-       if (msgnum > 0L) {
-               load_ical_object(msgnum, 0, (-1), save_individual_event, NULL, 0);
-       }
-       else {
-               save_individual_event(NULL, 0L, "", 0, NULL);
-       }
-}
-
-
-// Anonymous request of freebusy data for a user
-void do_freebusy(void) {
-       const char *req = ChrPtr(WC->Hdr->HR.ReqLine);
-       char who[SIZ];
-       char buf[SIZ];
-       int len;
-       long lines;
-
-       extract_token(who, req, 0, ' ', sizeof who);
-       if (!strncasecmp(who, "/freebusy/", 10)) {
-               strcpy(who, &who[10]);
-       }
-       unescape_input(who);
-
-       len = strlen(who);
-       if ( (!strcasecmp(&who[len-4], ".vcf"))
-            || (!strcasecmp(&who[len-4], ".ifb"))
-            || (!strcasecmp(&who[len-4], ".vfb")) ) {
-               who[len-4] = 0;
-       }
-
-       syslog(LOG_INFO, "freebusy requested for <%s>\n", who);
-       serv_printf("ICAL freebusy|%s", who);
-       serv_getln(buf, sizeof buf);
-
-       if (buf[0] != '1') {
-               hprintf("HTTP/1.1 404 %s\n", &buf[4]);
-               output_headers(0, 0, 0, 0, 0, 0);
-               hprintf("Content-Type: text/plain\r\n");
-               wc_printf("%s\n", &buf[4]);
-               end_burst();
-               return;
-       }
-
-       read_server_text(WC->WBuf, &lines);
-       http_transmit_thing("text/calendar", 0);
-}
-
-
-int calendar_Cleanup(void **ViewSpecific) {
-       calview *c;
-       
-       c = (calview *) *ViewSpecific;
-
-       wDumpContent(1);
-       free (c);
-       *ViewSpecific = NULL;
-
-       return 0;
-}
-
-
-int __calendar_Cleanup(void **ViewSpecific) {
-       calview *c;
-       
-       c = (calview *) *ViewSpecific;
-
-       free (c);
-       *ViewSpecific = NULL;
-
-       return 0;
-}
-
-
-void 
-InitModule_CALENDAR
-(void)
-{
-       RegisterReadLoopHandlerset(
-               VIEW_CALENDAR,
-               calendar_GetParamsGetServerCall,
-               NULL,
-               NULL,
-               NULL,
-               calendar_LoadMsgFromServer,
-               calendar_RenderView_or_Tail,
-               calendar_Cleanup,
-               NULL);
-
-       RegisterReadLoopHandlerset(
-               VIEW_CALBRIEF,
-               calendar_GetParamsGetServerCall,
-               NULL,
-               NULL,
-               NULL,
-               calendar_LoadMsgFromServer,
-               calendar_RenderView_or_Tail,
-               calendar_Cleanup,
-               NULL);
-
-
-
-       RegisterPreference("daystart", _("Calendar day view begins at:"), PRF_INT, NULL);
-       RegisterPreference("dayend", _("Calendar day view ends at:"), PRF_INT, NULL);
-       RegisterPreference("weekstart", _("Week starts on:"), PRF_INT, NULL);
-
-       WebcitAddUrlHandler(HKEY("freebusy"), "", 0, do_freebusy, COOKIEUNNEEDED|ANONYMOUS|FORCE_SESSIONCLOSE);
-       WebcitAddUrlHandler(HKEY("display_edit_task"), "", 0, display_edit_task, 0);
-       WebcitAddUrlHandler(HKEY("display_edit_event"), "", 0, display_edit_event, 0);
-       WebcitAddUrlHandler(HKEY("save_event"), "", 0, save_event, 0);
-       WebcitAddUrlHandler(HKEY("respond_to_request"), "", 0, respond_to_request, 0);
-       WebcitAddUrlHandler(HKEY("handle_rsvp"), "", 0, handle_rsvp, 0);
-}