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