4 * This module implements iCalendar object processing and the Calendar>
5 * room on a Citadel/UX server. It handles iCalendar objects using the
6 * iTIP protocol. See RFCs 2445 and 2446.
12 #include <sys/types.h>
19 #include "serv_calendar.h"
22 #include "citserver.h"
23 #include "sysdep_decls.h"
26 #include "dynloader.h"
31 #include "mime_parser.h"
39 struct ical_respond_data {
40 char desired_partnum[SIZ];
49 * Write our config to disk
51 void ical_write_to_cal(struct usersupp *u, icalcomponent *cal) {
56 strcpy(temp, tmpnam(NULL));
57 ser = icalcomponent_as_ical_string(cal);
58 if (ser == NULL) return;
60 /* Make a temp file out of it */
61 fp = fopen(temp, "w");
62 if (fp == NULL) return;
63 fwrite(ser, strlen(ser), 1, fp);
66 /* This handy API function does all the work for us.
67 * NOTE: normally we would want to set that last argument to 1, to
68 * force the system to delete the user's old vCard. But it doesn't
69 * have to, because the vcard_upload_beforesave() hook above
70 * is going to notice what we're trying to do, and delete the old vCard.
72 CtdlWriteObject(USERCALENDARROOM, /* which room */
73 "text/calendar", /* MIME type */
77 0, /* don't delete others of this type */
85 * Add a calendar object to the user's calendar
87 void ical_add(icalcomponent *cal, int recursion_level) {
91 * The VEVENT subcomponent is the one we're interested in saving.
93 if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
95 ical_write_to_cal(&CC->usersupp, cal);
99 /* If the component has subcomponents, recurse through them. */
100 for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
102 c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
103 /* Recursively process subcomponent */
104 ical_add(c, recursion_level+1);
112 * Callback function for mime parser that hunts for calendar content types
113 * and turns them into calendar objects
115 void ical_locate_part(char *name, char *filename, char *partnum, char *disp,
116 void *content, char *cbtype, size_t length, char *encoding,
119 struct ical_respond_data *ird = NULL;
121 ird = (struct ical_respond_data *) cbuserdata;
122 if (ird->cal != NULL) {
123 icalcomponent_free(ird->cal);
126 if (strcasecmp(partnum, ird->desired_partnum)) return;
127 ird->cal = icalcomponent_new_from_string(content);
132 * Respond to a meeting request.
134 void ical_respond(long msgnum, char *partnum, char *action) {
135 struct CtdlMessage *msg;
136 struct ical_respond_data ird;
139 (strcasecmp(action, "accept"))
140 && (strcasecmp(action, "decline"))
142 cprintf("%d Action must be 'accept' or 'decline'\n",
143 ERROR + ILLEGAL_VALUE
148 msg = CtdlFetchMessage(msgnum);
150 cprintf("%d Message %ld not found.\n",
157 memset(&ird, 0, sizeof ird);
158 strcpy(ird.desired_partnum, partnum);
159 mime_parser(msg->cm_fields['M'],
161 *ical_locate_part, /* callback function */
163 (void *) &ird, /* user data */
167 CtdlFreeMessage(msg);
169 if (ird.cal != NULL) {
170 /* Save this in the user's calendar if necessary */
171 if (!strcasecmp(action, "accept")) {
172 ical_add(ird.cal, 0);
175 /* Send a reply if necessary */
176 /* FIXME ... do this */
178 /* Delete the message from the inbox */
179 /* FIXME ... do this */
181 icalcomponent_free(ird.cal);
183 cprintf("%d ok\n", CIT_OK);
187 cprintf("%d No calendar object found\n", ERROR);
191 /* should never get here */
197 * Backend for ical_hunt_for_conflicts()
199 void vcard_hunt_for_conflicts_backend(long msgnum, void *data) {
201 struct CtdlMessage *msg;
202 struct ical_respond_data ird;
204 cal = (icalcomponent *)data;
206 msg = CtdlFetchMessage(msgnum);
207 if (msg == NULL) return;
208 memset(&ird, 0, sizeof ird);
209 strcpy(ird.desired_partnum, "1"); /* hopefully it's always 1 */
210 mime_parser(msg->cm_fields['M'],
212 *ical_locate_part, /* callback function */
214 (void *) &ird, /* user data */
217 CtdlFreeMessage(msg);
219 if (ird.cal == NULL) return;
221 /* Now compare cal to ird.cal */
222 cprintf("hunted msg %ld\n", msgnum);
224 icalcomponent_free(ird.cal);
230 * Phase 2 of "hunt for conflicts" operation.
231 * At this point we have a calendar object which represents the VEVENT that
232 * we're considering adding to the calendar. Now hunt through the user's
233 * calendar room, and output zero or more existing VEVENTs which conflict
236 void ical_hunt_for_conflicts(icalcomponent *cal) {
237 char hold_rm[ROOMNAMELEN];
239 strcpy(hold_rm, CC->quickroom.QRname); /* save current room */
241 if (getroom(&CC->quickroom, USERCALENDARROOM) != 0) {
242 getroom(&CC->quickroom, hold_rm);
243 cprintf("%d You do not have a calendar.\n", ERROR);
247 cprintf("%d Conflicting events:\n", LISTING_FOLLOWS);
249 CtdlForEachMessage(MSGS_ALL, 0, "text/calendar",
251 vcard_hunt_for_conflicts_backend,
256 getroom(&CC->quickroom, hold_rm); /* return to saved room */
263 * Hunt for conflicts (Phase 1 -- retrieve the object and call Phase 2)
265 void ical_conflicts(long msgnum, char *partnum) {
266 struct CtdlMessage *msg;
267 struct ical_respond_data ird;
269 msg = CtdlFetchMessage(msgnum);
271 cprintf("%d Message %ld not found.\n",
278 memset(&ird, 0, sizeof ird);
279 strcpy(ird.desired_partnum, partnum);
280 mime_parser(msg->cm_fields['M'],
282 *ical_locate_part, /* callback function */
284 (void *) &ird, /* user data */
288 CtdlFreeMessage(msg);
290 if (ird.cal != NULL) {
291 ical_hunt_for_conflicts(ird.cal);
292 icalcomponent_free(ird.cal);
296 cprintf("%d No calendar object found\n", ERROR);
300 /* should never get here */
307 * All Citadel calendar commands from the client come through here.
309 void cmd_ical(char *argbuf)
316 if (CtdlAccessCheck(ac_logged_in)) return;
318 extract(subcmd, argbuf, 0);
320 if (!strcmp(subcmd, "test")) {
321 cprintf("%d This server supports calendaring\n", CIT_OK);
325 else if (!strcmp(subcmd, "respond")) {
326 msgnum = extract_long(argbuf, 1);
327 extract(partnum, argbuf, 2);
328 extract(action, argbuf, 3);
329 ical_respond(msgnum, partnum, action);
332 else if (!strcmp(subcmd, "conflicts")) {
333 msgnum = extract_long(argbuf, 1);
334 extract(partnum, argbuf, 2);
335 ical_conflicts(msgnum, partnum);
339 cprintf("%d Invalid subcommand\n", ERROR+CMD_NOT_SUPPORTED);
343 /* should never get here */
346 #endif /* HAVE_ICAL_H */
350 * We don't know if the calendar room exists so we just create it at login
352 void ical_create_room(void)
357 /* Create the calendar room if it doesn't already exist */
358 create_room(USERCALENDARROOM, 4, "", 0, 1, 0);
360 /* Set expiration policy to manual; otherwise objects will be lost! */
361 if (lgetroom(&qr, USERCALENDARROOM)) {
362 lprintf(3, "Couldn't get the user calendar room!\n");
365 qr.QRep.expire_mode = EXPIRE_MANUAL;
368 /* Set the view to a calendar view */
369 CtdlGetRelationship(&vbuf, &CC->usersupp, &qr);
370 vbuf.v_view = 3; /* 3 = calendar */
371 CtdlSetRelationship(&vbuf, &CC->usersupp, &qr);
373 /* Create the tasks list room if it doesn't already exist */
374 create_room(USERTASKSROOM, 4, "", 0, 1, 0);
376 /* Set expiration policy to manual; otherwise objects will be lost! */
377 if (lgetroom(&qr, USERTASKSROOM)) {
378 lprintf(3, "Couldn't get the user calendar room!\n");
381 qr.QRep.expire_mode = EXPIRE_MANUAL;
384 /* Set the view to a task list view */
385 CtdlGetRelationship(&vbuf, &CC->usersupp, &qr);
386 vbuf.v_view = 4; /* 4 = tasks */
387 CtdlSetRelationship(&vbuf, &CC->usersupp, &qr);
393 /* See if we need to prevent the object from being saved */
394 int ical_obj_beforesave(struct CtdlMessage *msg)
396 char roomname[ROOMNAMELEN];
401 * Only messages with content-type text/calendar or text/x-calendar
402 * may be saved to Calendar>. If the message is bound for
403 * Calendar> but doesn't have this content-type, throw an error
404 * so that the message may not be posted.
407 /* First determine if this is our room */
408 MailboxName(roomname, sizeof roomname, &CC->usersupp, USERCALENDARROOM);
409 if (strncmp(roomname, msg->cm_fields['O'], ROOMNAMELEN))
410 return 0; /* It's not us... */
412 /* Then determine content-type of the message */
414 /* It must be an RFC822 message! */
415 /* FIXME: Not handling MIME multipart messages; implement with IMIP */
416 if (msg->cm_format_type != 4)
417 return 1; /* You tried to save a non-RFC822 message! */
419 /* Find the Content-Type: header */
420 p = msg->cm_fields['M'];
423 if (!strncasecmp(p, "Content-Type: ", 14)) { /* Found it */
424 if (!strncasecmp(p + 14, "text/x-calendar", 15) ||
425 !strncasecmp(p + 14, "text/calendar", 13))
433 /* Oops! No Content-Type in this message! How'd that happen? */
434 lprintf(7, "RFC822 message with no Content-Type header!\n");
440 /* Register this module with the Citadel server. */
441 char *Dynamic_Module_Init(void)
443 CtdlRegisterMessageHook(ical_obj_beforesave, EVT_BEFORESAVE);
445 CtdlRegisterSessionHook(ical_create_room, EVT_LOGIN);
446 CtdlRegisterProtoHook(cmd_ical, "ICAL", "Citadel iCal commands");