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