webcit/calendar.c

   1 /*
   2  * $Id$
   3  *
   4  * Functions which handle calendar objects and their processing/display.
   5  *
   6  */
   7
   8 #include <ctype.h>
   9 #include <stdlib.h>
  10 #include <unistd.h>
  11 #include <stdio.h>
  12 #include <fcntl.h>
  13 #include <signal.h>
  14 #include <sys/types.h>
  15 #include <sys/wait.h>
  16 #include <sys/socket.h>
  17 #include <limits.h>
  18 #include <netinet/in.h>
  19 #include <netdb.h>
  20 #include <string.h>
  21 #include <pwd.h>
  22 #include <errno.h>
  23 #include <stdarg.h>
  24 #include <pthread.h>
  25 #include <signal.h>
  26 #include <time.h>
  27 #include "webcit.h"
  28 #include "webserver.h"
  29
  30 #ifndef HAVE_ICAL_H
  31
  32 /*
  33  * Handler stubs for builds with no calendar library available
  34  */
  35 void cal_process_attachment(char *part_source, long msgnum, char *cal_partnum) {
  36
  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"
  42         );
  43
  44 }
  45
  46 void display_calendar(long msgnum) {
  47         wprintf("<i>"
  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."
  51                 "</i><br>\n");
  52 }
  53
  54 void display_task(long msgnum) {
  55         wprintf("<i>"
  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."
  59                 "</i><br>\n");
  60 }
  61
  62 #else /* HAVE_ICAL_H */
  63
  64
  65 /******   End of handler stubs.  Everything below this line is real.   ******/
  66
  67
  68
  69
  70 /*
  71  * Process a calendar object
  72  * ...at this point it's already been deserialized by cal_process_attachment()
  73  */
  74 void cal_process_object(icalcomponent *cal,
  75                         int recursion_level,
  76                         long msgnum,
  77                         char *cal_partnum
  78 ) {
  79         icalcomponent *c;
  80         icalproperty *method = NULL;
  81         icalproperty_method the_method = ICAL_METHOD_NONE;
  82         icalproperty *p;
  83         struct icaltimetype t;
  84         time_t tt;
  85         char buf[SIZ];
  86
  87         /* Leading HTML for the display of this object */
  88         if (recursion_level == 0) {
  89                 wprintf("<CENTER><TABLE border=0 cellpadding=5>\n");
  90         }
  91
  92         /* Look for a method */
  93         method = icalcomponent_get_first_property(cal, ICAL_METHOD_PROPERTY);
  94
  95         /* See what we need to do with this */
  96         if (method != NULL) {
  97                 the_method = icalproperty_get_method(method);
  98                 switch(the_method) {
  99                     case ICAL_METHOD_REQUEST:
 100                         wprintf("<TR><TD COLSPAN=2>\n"
 101                                 "<IMG ALIGN=CENTER "
 102                                 "SRC=\"/static/vcalendar.gif\">"
 103                                 "&nbsp;&nbsp;"
 104                                 "<B>Meeting invitation</B>
 105                                 </TD></TR>\n"
 106                         );
 107                         break;
 108                     case ICAL_METHOD_PUBLISH:
 109                         wprintf("<TR><TD COLSPAN=2>\n"
 110                                 "<IMG ALIGN=CENTER "
 111                                 "SRC=\"/static/vcalendar.gif\">"
 112                                 "&nbsp;&nbsp;"
 113                                 "<B>Published event</B>
 114                                 </TD></TR>\n"
 115                         );
 116                         break;
 117                     default:
 118                         wprintf("<TR><TD COLSPAN=2>"
 119                                 "I don't know what to do with this.</TD></TR>"
 120                                 "\n");
 121                         break;
 122                 }
 123         }
 124
 125         p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
 126         if (p != NULL) {
 127                 wprintf("<TR><TD><B>Summary:</B></TD><TD>");
 128                 escputs((char *)icalproperty_get_comment(p));
 129                 wprintf("</TD></TR>\n");
 130         }
 131
 132         p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
 133         if (p != NULL) {
 134                 wprintf("<TR><TD><B>Location:</B></TD><TD>");
 135                 escputs((char *)icalproperty_get_comment(p));
 136                 wprintf("</TD></TR>\n");
 137         }
 138
 139         /*
 140          * Only show start/end times if we're actually looking at the VEVENT
 141          * component.  Otherwise it shows bogus dates for things like timezone.
 142          */
 143         if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
 144
 145                 p = icalcomponent_get_first_property(cal,
 146                                                 ICAL_DTSTART_PROPERTY);
 147                 if (p != NULL) {
 148                         t = icalproperty_get_dtstart(p);
 149                         tt = icaltime_as_timet(t);
 150                         fmt_date(buf, tt);
 151                         wprintf("<TR><TD><B>Starting date/time:</B></TD><TD>"
 152                                 "%s</TD></TR>", buf
 153                         );
 154                 }
 155
 156                 p = icalcomponent_get_first_property(cal, ICAL_DTEND_PROPERTY);
 157                 if (p != NULL) {
 158                         t = icalproperty_get_dtend(p);
 159                         tt = icaltime_as_timet(t);
 160                         fmt_date(buf, tt);
 161                         wprintf("<TR><TD><B>Ending date/time:</B></TD><TD>"
 162                                 "%s</TD></TR>", buf
 163                         );
 164                 }
 165
 166         }
 167
 168         p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
 169         if (p != NULL) {
 170                 wprintf("<TR><TD><B>Description:</B></TD><TD>");
 171                 escputs((char *)icalproperty_get_comment(p));
 172                 wprintf("</TD></TR>\n");
 173         }
 174
 175         /* If the component has subcomponents, recurse through them. */
 176         for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
 177             (c != 0);
 178             c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
 179                 /* Recursively process subcomponent */
 180                 cal_process_object(c, recursion_level+1, msgnum, cal_partnum);
 181         }
 182
 183         /* If this is a REQUEST, display the Accept/Decline buttons */
 184         if (the_method == ICAL_METHOD_REQUEST) {
 185                 wprintf("<TR><TD COLSPAN=2>"
 186                         "<FORM METHOD=\"GET\" "
 187                         "ACTION=\"/respond_to_request\">\n"
 188                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 189                                 "VALUE=\"Accept\">\n"
 190                         "&nbsp;&nbsp;"
 191                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 192                                 "VALUE=\"Tentative\">\n"
 193                         "&nbsp;&nbsp;"
 194                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 195                                 "VALUE=\"Decline\">\n"
 196                         "<INPUT TYPE=\"hidden\" NAME=\"msgnum\" "
 197                                 "VALUE=\"%ld\">"
 198                         "<INPUT TYPE=\"hidden\" NAME=\"cal_partnum\" "
 199                                 "VALUE=\"%s\">"
 200                         "</FORM>"
 201                         "</TD></TR>\n",
 202                         msgnum, cal_partnum
 203                 );
 204         }
 205
 206         /* Trailing HTML for the display of this object */
 207         if (recursion_level == 0) {
 208                 wprintf("</TD></TR></TABLE></CENTER>\n");
 209         }
 210 }
 211
 212
 213 /*
 214  * Deserialize a calendar object in a message so it can be processed.
 215  * (This is the main entry point for these things)
 216  */
 217 void cal_process_attachment(char *part_source, long msgnum, char *cal_partnum) {
 218         icalcomponent *cal;
 219
 220         cal = icalcomponent_new_from_string(part_source);
 221
 222         if (cal == NULL) {
 223                 wprintf("Error parsing calendar object: %s<BR>\n",
 224                         icalerror_strerror(icalerrno));
 225                 return;
 226         }
 227
 228         cal_process_object(cal, 0, msgnum, cal_partnum);
 229
 230         /* Free the memory we obtained from libical's constructor */
 231         icalcomponent_free(cal);
 232 }
 233
 234
 235
 236
 237 /*
 238  * Respond to a meeting request
 239  */
 240 void respond_to_request(void) {
 241         char buf[SIZ];
 242
 243         output_headers(3);
 244
 245         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=007700><TR><TD>"
 246                 "<FONT SIZE=+1 COLOR=\"FFFFFF\""
 247                 "<B>Respond to meeting request</B>"
 248                 "</FONT></TD></TR></TABLE><BR>\n"
 249         );
 250
 251         serv_printf("ICAL respond|%s|%s|%s|",
 252                 bstr("msgnum"),
 253                 bstr("cal_partnum"),
 254                 bstr("sc")
 255         );
 256         serv_gets(buf);
 257         escputs(buf);
 258
 259         wDumpContent(1);
 260 }
 261
 262
 263
 264
 265 /*****************************************************************************/
 266
 267
 268
 269 /*
 270  * Display handlers for message reading
 271  */
 272
 273
 274
 275 /*
 276  * If we're reading calendar items, just store them for now.  We have to
 277  * sort and re-output them later when we draw the calendar.
 278  */
 279 void display_individual_cal(icalcomponent *cal, long msgnum) {
 280
 281         WC->num_cal += 1;
 282
 283         WC->disp_cal = realloc(WC->disp_cal,
 284                         (sizeof(icalcomponent *) * WC->num_cal) );
 285         WC->disp_cal[WC->num_cal - 1] = icalcomponent_new_clone(cal);
 286
 287         WC->cal_msgnum = realloc(WC->cal_msgnum,
 288                         (sizeof(long) * WC->num_cal) );
 289         WC->cal_msgnum[WC->num_cal - 1] = msgnum;
 290 }
 291
 292
 293
 294 /*
 295  * Display a task in the task list
 296  */
 297 void display_individual_task(icalcomponent *vtodo, long msgnum) {
 298         icalproperty *p;
 299
 300         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 301         wprintf("<LI><A HREF=\"/display_edit_task?msgnum=%ld\">", msgnum);
 302         if (p != NULL) {
 303                 escputs((char *)icalproperty_get_comment(p));
 304         }
 305         wprintf("</A>\n");
 306 }
 307
 308
 309 /*
 310  * Display a task by itself (for editing)
 311  */
 312 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 313         icalcomponent *vtodo;
 314         icalproperty *p;
 315         struct icaltimetype t;
 316         time_t now;
 317         int created_new_vtodo = 0;
 318
 319         now = time(NULL);
 320
 321         if (supplied_vtodo != NULL) {
 322                 vtodo = supplied_vtodo;
 323         }
 324         else {
 325                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 326                 created_new_vtodo = 1;
 327         }
 328
 329         output_headers(3);
 330         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=007700><TR><TD>"
 331                 "<FONT SIZE=+1 COLOR=\"FFFFFF\""
 332                 "<B>Edit task</B>"
 333                 "</FONT></TD></TR></TABLE><BR>\n"
 334         );
 335
 336         wprintf("<FORM METHOD=\"POST\" ACTION=\"/save_task\">\n");
 337         wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
 338                 msgnum);
 339
 340         wprintf("Summary: "
 341                 "<INPUT TYPE=\"text\" NAME=\"summary\" "
 342                 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
 343         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 344         if (p != NULL) {
 345                 escputs((char *)icalproperty_get_comment(p));
 346         }
 347         wprintf("\"><BR>\n");
 348
 349         wprintf("Start date: ");
 350         p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
 351         if (p != NULL) {
 352                 t = icalproperty_get_dtstart(p);
 353         }
 354         else {
 355                 t = icaltime_from_timet(now, 0);
 356         }
 357         display_icaltimetype_as_webform(&t, "dtstart");
 358         wprintf("<BR>\n");
 359
 360         wprintf("Due date: ");
 361         p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
 362         if (p != NULL) {
 363                 t = icalproperty_get_due(p);
 364         }
 365         else {
 366                 t = icaltime_from_timet(now, 0);
 367         }
 368         display_icaltimetype_as_webform(&t, "due");
 369         wprintf("<BR>\n");
 370
 371         wprintf("<CENTER><TEXTAREA NAME=\"description\" wrap=soft "
 372                 "ROWS=10 COLS=80 WIDTH=80>\n"
 373         );
 374         p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
 375         if (p != NULL) {
 376                 escputs((char *)icalproperty_get_comment(p));
 377         }
 378         wprintf("</TEXTAREA><BR>\n");
 379
 380         wprintf("<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Save\">"
 381                 "&nbsp;&nbsp;"
 382                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Delete\">\n"
 383                 "&nbsp;&nbsp;"
 384                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Cancel\">\n"
 385                 "</CENTER>\n"
 386         );
 387
 388         wprintf("</FORM>\n");
 389
 390         wDumpContent(1);
 391
 392         if (created_new_vtodo) {
 393                 icalcomponent_free(vtodo);
 394         }
 395 }
 396
 397 /*
 398  * Save an edited task
 399  */
 400 void save_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 401         char buf[SIZ];
 402         int delete_existing = 0;
 403         icalproperty *prop;
 404         icalcomponent *vtodo;
 405         int created_new_vtodo = 0;
 406
 407         if (supplied_vtodo != NULL) {
 408                 vtodo = supplied_vtodo;
 409         }
 410         else {
 411                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 412                 created_new_vtodo = 1;
 413         }
 414
 415         if (!strcasecmp(bstr("sc"), "Save")) {
 416
 417                 /* Replace values in the component with ones from the form */
 418
 419                 while (prop = icalcomponent_get_first_property(vtodo,
 420                       ICAL_SUMMARY_PROPERTY), prop != NULL) {
 421                         icalcomponent_remove_property(vtodo, prop);
 422                 }
 423                 icalcomponent_add_property(vtodo,
 424                         icalproperty_new_summary(bstr("summary")));
 425
 426                 while (prop = icalcomponent_get_first_property(vtodo,
 427                       ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
 428                         icalcomponent_remove_property(vtodo, prop);
 429                 }
 430                 icalcomponent_add_property(vtodo,
 431                         icalproperty_new_description(bstr("description")));
 432
 433                 while (prop = icalcomponent_get_first_property(vtodo,
 434                       ICAL_DTSTART_PROPERTY), prop != NULL) {
 435                         icalcomponent_remove_property(vtodo, prop);
 436                 }
 437                 icalcomponent_add_property(vtodo,
 438                         icalproperty_new_dtstart(
 439                                 icaltime_from_webform("dtstart")
 440                         )
 441                 );
 442
 443                 while (prop = icalcomponent_get_first_property(vtodo,
 444                       ICAL_DUE_PROPERTY), prop != NULL) {
 445                         icalcomponent_remove_property(vtodo, prop);
 446                 }
 447                 icalcomponent_add_property(vtodo,
 448                         icalproperty_new_due(
 449                                 icaltime_from_webform("due")
 450                         )
 451                 );
 452
 453                 /* Serialize it and save it to the message base */
 454                 serv_puts("ENT0 1|||4");
 455                 serv_gets(buf);
 456                 if (buf[0] == '4') {
 457                         serv_puts("Content-type: text/calendar");
 458                         serv_puts("");
 459                         serv_puts(icalcomponent_as_ical_string(vtodo));
 460                         serv_puts("000");
 461                         delete_existing = 1;
 462                 }
 463         }
 464
 465         /*
 466          * If the user clicked 'Delete' then delete it, period.
 467          */
 468         if (!strcasecmp(bstr("sc"), "Delete")) {
 469                 delete_existing = 1;
 470         }
 471
 472         if ( (delete_existing) && (msgnum > 0L) ) {
 473                 serv_printf("DELE %ld", atol(bstr("msgnum")));
 474                 serv_gets(buf);
 475         }
 476
 477         if (created_new_vtodo) {
 478                 icalcomponent_free(vtodo);
 479         }
 480
 481         /* Go back to the task list */
 482         readloop("readfwd");
 483 }
 484
 485
 486
 487 /*
 488  * Code common to all display handlers.  Given a message number and a MIME
 489  * type, we load the message and hunt for that MIME type.  If found, we load
 490  * the relevant part, deserialize it into a libical component, filter it for
 491  * the requested object type, and feed it to the specified handler.
 492  */
 493 void display_using_handler(long msgnum,
 494                         char *mimetype,
 495                         icalcomponent_kind which_kind,
 496                         void (*callback)(icalcomponent *, long)
 497         ) {
 498         char buf[SIZ];
 499         char mime_partnum[SIZ];
 500         char mime_filename[SIZ];
 501         char mime_content_type[SIZ];
 502         char mime_disposition[SIZ];
 503         int mime_length;
 504         char relevant_partnum[SIZ];
 505         char *relevant_source = NULL;
 506         icalcomponent *cal, *c;
 507
 508         sprintf(buf, "MSG0 %ld|1", msgnum);     /* ask for headers only */
 509         serv_puts(buf);
 510         serv_gets(buf);
 511         if (buf[0] != '1') return;
 512
 513         while (serv_gets(buf), strcmp(buf, "000")) {
 514                 if (!strncasecmp(buf, "part=", 5)) {
 515                         extract(mime_filename, &buf[5], 1);
 516                         extract(mime_partnum, &buf[5], 2);
 517                         extract(mime_disposition, &buf[5], 3);
 518                         extract(mime_content_type, &buf[5], 4);
 519                         mime_length = extract_int(&buf[5], 5);
 520
 521                         if (!strcasecmp(mime_content_type, "text/calendar")) {
 522                                 strcpy(relevant_partnum, mime_partnum);
 523                         }
 524
 525                 }
 526         }
 527
 528         if (strlen(relevant_partnum) > 0) {
 529                 relevant_source = load_mimepart(msgnum, relevant_partnum);
 530                 if (relevant_source != NULL) {
 531
 532                         cal = icalcomponent_new_from_string(relevant_source);
 533                         if (cal != NULL) {
 534
 535                                 /* Simple components of desired type */
 536                                 if (icalcomponent_isa(cal) == which_kind) {
 537                                         callback(cal, msgnum);
 538                                 }
 539
 540                                 /* Subcomponents of desired type */
 541                                 for (c = icalcomponent_get_first_component(cal,
 542                                     which_kind);
 543                                     (c != 0);
 544                                     c = icalcomponent_get_next_component(cal,
 545                                     which_kind)) {
 546                                         callback(c, msgnum);
 547                                 }
 548                                 icalcomponent_free(cal);
 549                         }
 550                         free(relevant_source);
 551                 }
 552         }
 553
 554 }
 555
 556 void display_calendar(long msgnum) {
 557         display_using_handler(msgnum, "text/calendar",
 558                                 ICAL_VEVENT_COMPONENT,
 559                                 display_individual_cal);
 560 }
 561
 562 void display_task(long msgnum) {
 563         display_using_handler(msgnum, "text/calendar",
 564                                 ICAL_VTODO_COMPONENT,
 565                                 display_individual_task);
 566 }
 567
 568 void display_edit_task(void) {
 569         long msgnum = 0L;
 570
 571         msgnum = atol(bstr("msgnum"));
 572         if (msgnum > 0L) {
 573                 /* existing task */
 574                 display_using_handler(msgnum, "text/calendar",
 575                                 ICAL_VTODO_COMPONENT,
 576                                 display_edit_individual_task);
 577         }
 578         else {
 579                 /* new task */
 580                 display_edit_individual_task(NULL, 0L);
 581         }
 582 }
 583
 584 void save_task(void) {
 585         long msgnum = 0L;
 586
 587         msgnum = atol(bstr("msgnum"));
 588         if (msgnum > 0L) {
 589                 display_using_handler(msgnum, "text/calendar",
 590                                 ICAL_VTODO_COMPONENT,
 591                                 save_individual_task);
 592         }
 593         else {
 594                 save_individual_task(NULL, 0L);
 595         }
 596 }
 597
 598 void display_edit_event(void) {
 599         long msgnum = 0L;
 600
 601         msgnum = atol(bstr("msgnum"));
 602         if (msgnum > 0L) {
 603                 /* existing event */
 604                 display_using_handler(msgnum, "text/calendar",
 605                                 ICAL_VEVENT_COMPONENT,
 606                                 display_edit_individual_event);
 607         }
 608         else {
 609                 /* new event */
 610                 display_edit_individual_event(NULL, 0L);
 611         }
 612 }
 613
 614 void save_event(void) {
 615         long msgnum = 0L;
 616
 617         msgnum = atol(bstr("msgnum"));
 618
 619         if (msgnum > 0L) {
 620                 display_using_handler(msgnum, "text/calendar",
 621                                 ICAL_VEVENT_COMPONENT,
 622                                 save_individual_event);
 623         }
 624         else {
 625                 save_individual_event(NULL, 0L);
 626         }
 627 }
 628
 629 #endif /* HAVE_ICAL_H */