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