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         char conflict_name[SIZ];
  87
  88         /* Leading HTML for the display of this object */
  89         if (recursion_level == 0) {
  90                 wprintf("<CENTER><TABLE border=0>\n");
  91         }
  92
  93         /* Look for a method */
  94         method = icalcomponent_get_first_property(cal, ICAL_METHOD_PROPERTY);
  95
  96         /* See what we need to do with this */
  97         if (method != NULL) {
  98                 the_method = icalproperty_get_method(method);
  99                 switch(the_method) {
 100                     case ICAL_METHOD_REQUEST:
 101                         wprintf("<TR><TD COLSPAN=2>\n"
 102                                 "<IMG ALIGN=CENTER "
 103                                 "SRC=\"/static/vcalendar.gif\">"
 104                                 "&nbsp;&nbsp;"
 105                                 "<B>Meeting invitation</B>
 106                                 </TD></TR>\n"
 107                         );
 108                         break;
 109                     case ICAL_METHOD_PUBLISH:
 110                         wprintf("<TR><TD COLSPAN=2>\n"
 111                                 "<IMG ALIGN=CENTER "
 112                                 "SRC=\"/static/vcalendar.gif\">"
 113                                 "&nbsp;&nbsp;"
 114                                 "<B>Published event</B>
 115                                 </TD></TR>\n"
 116                         );
 117                         break;
 118                     default:
 119                         wprintf("<TR><TD COLSPAN=2>"
 120                                 "I don't know what to do with this.</TD></TR>"
 121                                 "\n");
 122                         break;
 123                 }
 124         }
 125
 126         p = icalcomponent_get_first_property(cal, ICAL_SUMMARY_PROPERTY);
 127         if (p != NULL) {
 128                 wprintf("<TR><TD><B>Summary:</B></TD><TD>");
 129                 escputs((char *)icalproperty_get_comment(p));
 130                 wprintf("</TD></TR>\n");
 131         }
 132
 133         p = icalcomponent_get_first_property(cal, ICAL_LOCATION_PROPERTY);
 134         if (p != NULL) {
 135                 wprintf("<TR><TD><B>Location:</B></TD><TD>");
 136                 escputs((char *)icalproperty_get_comment(p));
 137                 wprintf("</TD></TR>\n");
 138         }
 139
 140         /*
 141          * Only show start/end times if we're actually looking at the VEVENT
 142          * component.  Otherwise it shows bogus dates for things like timezone.
 143          */
 144         if (icalcomponent_isa(cal) == ICAL_VEVENT_COMPONENT) {
 145
 146                 p = icalcomponent_get_first_property(cal,
 147                                                 ICAL_DTSTART_PROPERTY);
 148                 if (p != NULL) {
 149                         t = icalproperty_get_dtstart(p);
 150                         tt = icaltime_as_timet(t);
 151                         fmt_date(buf, tt);
 152                         wprintf("<TR><TD><B>Starting date/time:</B></TD><TD>"
 153                                 "%s</TD></TR>", buf
 154                         );
 155                 }
 156
 157                 p = icalcomponent_get_first_property(cal, ICAL_DTEND_PROPERTY);
 158                 if (p != NULL) {
 159                         t = icalproperty_get_dtend(p);
 160                         tt = icaltime_as_timet(t);
 161                         fmt_date(buf, tt);
 162                         wprintf("<TR><TD><B>Ending date/time:</B></TD><TD>"
 163                                 "%s</TD></TR>", buf
 164                         );
 165                 }
 166
 167         }
 168
 169         p = icalcomponent_get_first_property(cal, ICAL_DESCRIPTION_PROPERTY);
 170         if (p != NULL) {
 171                 wprintf("<TR><TD><B>Description:</B></TD><TD>");
 172                 escputs((char *)icalproperty_get_comment(p));
 173                 wprintf("</TD></TR>\n");
 174         }
 175
 176         /* If the component has subcomponents, recurse through them. */
 177         for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
 178             (c != 0);
 179             c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
 180                 /* Recursively process subcomponent */
 181                 cal_process_object(c, recursion_level+1, msgnum, cal_partnum);
 182         }
 183
 184         /* If this is a REQUEST, display conflicts and buttons */
 185         if (the_method == ICAL_METHOD_REQUEST) {
 186
 187                 /* Check for conflicts */
 188                 serv_printf("ICAL conflicts|%ld|%s|", msgnum, cal_partnum);
 189                 serv_gets(buf);
 190                 if (buf[0] == '1') {
 191                         while (serv_gets(buf), strcmp(buf, "000")) {
 192                                 extract(conflict_name, buf, 3);
 193                                 wprintf("<TR><TD><B><I>CONFLICT:</I></B></TD>"
 194                                         "<TD>"
 195                                         "This event would conflict with "
 196                                         "<I>&quot;"
 197                                 );
 198                                 escputs(conflict_name);
 199                                 wprintf("&quot;</I> "
 200                                         "which is already in your calendar."
 201                                         "</TD></TR>\n");
 202                         }
 203                 }
 204
 205                 /* Display the Accept/Decline buttons */
 206                 wprintf("<TR><TD COLSPAN=2>"
 207                         "<FORM METHOD=\"GET\" "
 208                         "ACTION=\"/respond_to_request\">\n"
 209                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 210                                 "VALUE=\"Accept\">\n"
 211                         "&nbsp;&nbsp;"
 212                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 213                                 "VALUE=\"Tentative\">\n"
 214                         "&nbsp;&nbsp;"
 215                         "<INPUT TYPE=\"submit\" NAME=\"sc\" "
 216                                 "VALUE=\"Decline\">\n"
 217                         "<INPUT TYPE=\"hidden\" NAME=\"msgnum\" "
 218                                 "VALUE=\"%ld\">"
 219                         "<INPUT TYPE=\"hidden\" NAME=\"cal_partnum\" "
 220                                 "VALUE=\"%s\">"
 221                         "</FORM>"
 222                         "</TD></TR>\n",
 223                         msgnum, cal_partnum
 224                 );
 225
 226         }
 227
 228         /* Trailing HTML for the display of this object */
 229         if (recursion_level == 0) {
 230
 231                 wprintf("</TR></TABLE></CENTER>\n");
 232         }
 233 }
 234
 235
 236 /*
 237  * Deserialize a calendar object in a message so it can be processed.
 238  * (This is the main entry point for these things)
 239  */
 240 void cal_process_attachment(char *part_source, long msgnum, char *cal_partnum) {
 241         icalcomponent *cal;
 242
 243         cal = icalcomponent_new_from_string(part_source);
 244
 245         if (cal == NULL) {
 246                 wprintf("Error parsing calendar object: %s<BR>\n",
 247                         icalerror_strerror(icalerrno));
 248                 return;
 249         }
 250
 251         cal_process_object(cal, 0, msgnum, cal_partnum);
 252
 253         /* Free the memory we obtained from libical's constructor */
 254         icalcomponent_free(cal);
 255 }
 256
 257
 258
 259
 260 /*
 261  * Respond to a meeting request
 262  */
 263 void respond_to_request(void) {
 264         char buf[SIZ];
 265
 266         output_headers(3);
 267
 268         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=007700><TR><TD>"
 269                 "<FONT SIZE=+1 COLOR=\"FFFFFF\""
 270                 "<B>Respond to meeting request</B>"
 271                 "</FONT></TD></TR></TABLE><BR>\n"
 272         );
 273
 274         serv_printf("ICAL respond|%s|%s|%s|",
 275                 bstr("msgnum"),
 276                 bstr("cal_partnum"),
 277                 bstr("sc")
 278         );
 279         serv_gets(buf);
 280         escputs(buf);
 281
 282         wDumpContent(1);
 283 }
 284
 285
 286
 287
 288 /*****************************************************************************/
 289
 290
 291
 292 /*
 293  * Display handlers for message reading
 294  */
 295
 296
 297
 298 /*
 299  * If we're reading calendar items, just store them for now.  We have to
 300  * sort and re-output them later when we draw the calendar.
 301  */
 302 void display_individual_cal(icalcomponent *cal, long msgnum) {
 303
 304         WC->num_cal += 1;
 305
 306         WC->disp_cal = realloc(WC->disp_cal,
 307                         (sizeof(icalcomponent *) * WC->num_cal) );
 308         WC->disp_cal[WC->num_cal - 1] = icalcomponent_new_clone(cal);
 309
 310         WC->cal_msgnum = realloc(WC->cal_msgnum,
 311                         (sizeof(long) * WC->num_cal) );
 312         WC->cal_msgnum[WC->num_cal - 1] = msgnum;
 313 }
 314
 315
 316
 317 /*
 318  * Display a task in the task list
 319  */
 320 void display_individual_task(icalcomponent *vtodo, long msgnum) {
 321         icalproperty *p;
 322
 323         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 324         wprintf("<LI><A HREF=\"/display_edit_task?msgnum=%ld\">", msgnum);
 325         if (p != NULL) {
 326                 escputs((char *)icalproperty_get_comment(p));
 327         }
 328         wprintf("</A>\n");
 329 }
 330
 331
 332 /*
 333  * Display a task by itself (for editing)
 334  */
 335 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 336         icalcomponent *vtodo;
 337         icalproperty *p;
 338         struct icaltimetype t;
 339         time_t now;
 340         int created_new_vtodo = 0;
 341
 342         now = time(NULL);
 343
 344         if (supplied_vtodo != NULL) {
 345                 vtodo = supplied_vtodo;
 346         }
 347         else {
 348                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 349                 created_new_vtodo = 1;
 350         }
 351
 352         output_headers(3);
 353         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=007700><TR><TD>"
 354                 "<FONT SIZE=+1 COLOR=\"FFFFFF\""
 355                 "<B>Edit task</B>"
 356                 "</FONT></TD></TR></TABLE><BR>\n"
 357         );
 358
 359         wprintf("<FORM METHOD=\"POST\" ACTION=\"/save_task\">\n");
 360         wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
 361                 msgnum);
 362
 363         wprintf("Summary: "
 364                 "<INPUT TYPE=\"text\" NAME=\"summary\" "
 365                 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
 366         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 367         if (p != NULL) {
 368                 escputs((char *)icalproperty_get_comment(p));
 369         }
 370         wprintf("\"><BR>\n");
 371
 372         wprintf("Start date: ");
 373         p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
 374         if (p != NULL) {
 375                 t = icalproperty_get_dtstart(p);
 376         }
 377         else {
 378                 t = icaltime_from_timet(now, 0);
 379         }
 380         display_icaltimetype_as_webform(&t, "dtstart");
 381         wprintf("<BR>\n");
 382
 383         wprintf("Due date: ");
 384         p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
 385         if (p != NULL) {
 386                 t = icalproperty_get_due(p);
 387         }
 388         else {
 389                 t = icaltime_from_timet(now, 0);
 390         }
 391         display_icaltimetype_as_webform(&t, "due");
 392         wprintf("<BR>\n");
 393
 394         wprintf("<CENTER><TEXTAREA NAME=\"description\" wrap=soft "
 395                 "ROWS=10 COLS=80 WIDTH=80>\n"
 396         );
 397         p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
 398         if (p != NULL) {
 399                 escputs((char *)icalproperty_get_comment(p));
 400         }
 401         wprintf("</TEXTAREA><BR>\n");
 402
 403         wprintf("<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Save\">"
 404                 "&nbsp;&nbsp;"
 405                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Delete\">\n"
 406                 "&nbsp;&nbsp;"
 407                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Cancel\">\n"
 408                 "</CENTER>\n"
 409         );
 410
 411         wprintf("</FORM>\n");
 412
 413         wDumpContent(1);
 414
 415         if (created_new_vtodo) {
 416                 icalcomponent_free(vtodo);
 417         }
 418 }
 419
 420 /*
 421  * Save an edited task
 422  */
 423 void save_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 424         char buf[SIZ];
 425         int delete_existing = 0;
 426         icalproperty *prop;
 427         icalcomponent *vtodo;
 428         int created_new_vtodo = 0;
 429
 430         if (supplied_vtodo != NULL) {
 431                 vtodo = supplied_vtodo;
 432         }
 433         else {
 434                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 435                 created_new_vtodo = 1;
 436         }
 437
 438         if (!strcasecmp(bstr("sc"), "Save")) {
 439
 440                 /* Replace values in the component with ones from the form */
 441
 442                 while (prop = icalcomponent_get_first_property(vtodo,
 443                       ICAL_SUMMARY_PROPERTY), prop != NULL) {
 444                         icalcomponent_remove_property(vtodo, prop);
 445                 }
 446                 icalcomponent_add_property(vtodo,
 447                         icalproperty_new_summary(bstr("summary")));
 448
 449                 while (prop = icalcomponent_get_first_property(vtodo,
 450                       ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
 451                         icalcomponent_remove_property(vtodo, prop);
 452                 }
 453                 icalcomponent_add_property(vtodo,
 454                         icalproperty_new_description(bstr("description")));
 455
 456                 while (prop = icalcomponent_get_first_property(vtodo,
 457                       ICAL_DTSTART_PROPERTY), prop != NULL) {
 458                         icalcomponent_remove_property(vtodo, prop);
 459                 }
 460                 icalcomponent_add_property(vtodo,
 461                         icalproperty_new_dtstart(
 462                                 icaltime_from_webform("dtstart")
 463                         )
 464                 );
 465
 466                 while (prop = icalcomponent_get_first_property(vtodo,
 467                       ICAL_DUE_PROPERTY), prop != NULL) {
 468                         icalcomponent_remove_property(vtodo, prop);
 469                 }
 470                 icalcomponent_add_property(vtodo,
 471                         icalproperty_new_due(
 472                                 icaltime_from_webform("due")
 473                         )
 474                 );
 475
 476                 /* Serialize it and save it to the message base */
 477                 serv_puts("ENT0 1|||4");
 478                 serv_gets(buf);
 479                 if (buf[0] == '4') {
 480                         serv_puts("Content-type: text/calendar");
 481                         serv_puts("");
 482                         serv_puts(icalcomponent_as_ical_string(vtodo));
 483                         serv_puts("000");
 484                         delete_existing = 1;
 485                 }
 486         }
 487
 488         /*
 489          * If the user clicked 'Delete' then delete it, period.
 490          */
 491         if (!strcasecmp(bstr("sc"), "Delete")) {
 492                 delete_existing = 1;
 493         }
 494
 495         if ( (delete_existing) && (msgnum > 0L) ) {
 496                 serv_printf("DELE %ld", atol(bstr("msgnum")));
 497                 serv_gets(buf);
 498         }
 499
 500         if (created_new_vtodo) {
 501                 icalcomponent_free(vtodo);
 502         }
 503
 504         /* Go back to the task list */
 505         readloop("readfwd");
 506 }
 507
 508
 509
 510 /*
 511  * Code common to all display handlers.  Given a message number and a MIME
 512  * type, we load the message and hunt for that MIME type.  If found, we load
 513  * the relevant part, deserialize it into a libical component, filter it for
 514  * the requested object type, and feed it to the specified handler.
 515  */
 516 void display_using_handler(long msgnum,
 517                         char *mimetype,
 518                         icalcomponent_kind which_kind,
 519                         void (*callback)(icalcomponent *, long)
 520         ) {
 521         char buf[SIZ];
 522         char mime_partnum[SIZ];
 523         char mime_filename[SIZ];
 524         char mime_content_type[SIZ];
 525         char mime_disposition[SIZ];
 526         int mime_length;
 527         char relevant_partnum[SIZ];
 528         char *relevant_source = NULL;
 529         icalcomponent *cal, *c;
 530
 531         sprintf(buf, "MSG0 %ld|1", msgnum);     /* ask for headers only */
 532         serv_puts(buf);
 533         serv_gets(buf);
 534         if (buf[0] != '1') return;
 535
 536         while (serv_gets(buf), strcmp(buf, "000")) {
 537                 if (!strncasecmp(buf, "part=", 5)) {
 538                         extract(mime_filename, &buf[5], 1);
 539                         extract(mime_partnum, &buf[5], 2);
 540                         extract(mime_disposition, &buf[5], 3);
 541                         extract(mime_content_type, &buf[5], 4);
 542                         mime_length = extract_int(&buf[5], 5);
 543
 544                         if (!strcasecmp(mime_content_type, "text/calendar")) {
 545                                 strcpy(relevant_partnum, mime_partnum);
 546                         }
 547
 548                 }
 549         }
 550
 551         if (strlen(relevant_partnum) > 0) {
 552                 relevant_source = load_mimepart(msgnum, relevant_partnum);
 553                 if (relevant_source != NULL) {
 554
 555                         cal = icalcomponent_new_from_string(relevant_source);
 556                         if (cal != NULL) {
 557
 558                                 /* Simple components of desired type */
 559                                 if (icalcomponent_isa(cal) == which_kind) {
 560                                         callback(cal, msgnum);
 561                                 }
 562
 563                                 /* Subcomponents of desired type */
 564                                 for (c = icalcomponent_get_first_component(cal,
 565                                     which_kind);
 566                                     (c != 0);
 567                                     c = icalcomponent_get_next_component(cal,
 568                                     which_kind)) {
 569                                         callback(c, msgnum);
 570                                 }
 571                                 icalcomponent_free(cal);
 572                         }
 573                         free(relevant_source);
 574                 }
 575         }
 576
 577 }
 578
 579 void display_calendar(long msgnum) {
 580         display_using_handler(msgnum, "text/calendar",
 581                                 ICAL_VEVENT_COMPONENT,
 582                                 display_individual_cal);
 583 }
 584
 585 void display_task(long msgnum) {
 586         display_using_handler(msgnum, "text/calendar",
 587                                 ICAL_VTODO_COMPONENT,
 588                                 display_individual_task);
 589 }
 590
 591 void display_edit_task(void) {
 592         long msgnum = 0L;
 593
 594         msgnum = atol(bstr("msgnum"));
 595         if (msgnum > 0L) {
 596                 /* existing task */
 597                 display_using_handler(msgnum, "text/calendar",
 598                                 ICAL_VTODO_COMPONENT,
 599                                 display_edit_individual_task);
 600         }
 601         else {
 602                 /* new task */
 603                 display_edit_individual_task(NULL, 0L);
 604         }
 605 }
 606
 607 void save_task(void) {
 608         long msgnum = 0L;
 609
 610         msgnum = atol(bstr("msgnum"));
 611         if (msgnum > 0L) {
 612                 display_using_handler(msgnum, "text/calendar",
 613                                 ICAL_VTODO_COMPONENT,
 614                                 save_individual_task);
 615         }
 616         else {
 617                 save_individual_task(NULL, 0L);
 618         }
 619 }
 620
 621 void display_edit_event(void) {
 622         long msgnum = 0L;
 623
 624         msgnum = atol(bstr("msgnum"));
 625         if (msgnum > 0L) {
 626                 /* existing event */
 627                 display_using_handler(msgnum, "text/calendar",
 628                                 ICAL_VEVENT_COMPONENT,
 629                                 display_edit_individual_event);
 630         }
 631         else {
 632                 /* new event */
 633                 display_edit_individual_event(NULL, 0L);
 634         }
 635 }
 636
 637 void save_event(void) {
 638         long msgnum = 0L;
 639
 640         msgnum = atol(bstr("msgnum"));
 641
 642         if (msgnum > 0L) {
 643                 display_using_handler(msgnum, "text/calendar",
 644                                 ICAL_VEVENT_COMPONENT,
 645                                 save_individual_event);
 646         }
 647         else {
 648                 save_individual_event(NULL, 0L);
 649         }
 650 }
 651
 652 #endif /* HAVE_ICAL_H */