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 single calendar component.
  72  * It won't be a compound component at this point because those have
  73  * already been broken down by cal_process_object().
  74  */
  75 void cal_process_subcomponent(icalcomponent *cal) {
  76         wprintf("cal_process_subcomponent() called<BR>\n");
  77         wprintf("cal_process_subcomponent() exiting<BR>\n");
  78 }
  79
  80
  81
  82
  83
  84 /*
  85  * Process a calendar object
  86  * ...at this point it's already been deserialized by cal_process_attachment()
  87  */
  88 void cal_process_object(icalcomponent *cal) {
  89         icalcomponent *c;
  90         int num_subcomponents = 0;
  91
  92         wprintf("cal_process_object() called<BR>\n");
  93
  94         /* Iterate through all subcomponents */
  95         wprintf("Iterating through all sub-components<BR>\n");
  96         for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
  97             (c != 0);
  98             c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
  99                 cal_process_subcomponent(c);
 100                 ++num_subcomponents;
 101         }
 102
 103         /* Iterate through all subcomponents */
 104         wprintf("Iterating through VEVENTs<BR>\n");
 105         for (c = icalcomponent_get_first_component(cal, ICAL_VEVENT_COMPONENT);
 106             (c != 0);
 107             c = icalcomponent_get_next_component(cal, ICAL_VEVENT_COMPONENT)) {
 108                 cal_process_subcomponent(c);
 109                 --num_subcomponents;
 110         }
 111
 112         /* Iterate through all subcomponents */
 113         wprintf("Iterating through VTODOs<BR>\n");
 114         for (c = icalcomponent_get_first_component(cal, ICAL_VTODO_COMPONENT);
 115             (c != 0);
 116             c = icalcomponent_get_next_component(cal, ICAL_VTODO_COMPONENT)) {
 117                 cal_process_subcomponent(c);
 118                 --num_subcomponents;
 119         }
 120
 121         /* Iterate through all subcomponents */
 122         wprintf("Iterating through VJOURNALs<BR>\n");
 123         for (c = icalcomponent_get_first_component(cal, ICAL_VJOURNAL_COMPONENT);
 124             (c != 0);
 125             c = icalcomponent_get_next_component(cal, ICAL_VJOURNAL_COMPONENT)) {
 126                 cal_process_subcomponent(c);
 127                 --num_subcomponents;
 128         }
 129
 130         /* Iterate through all subcomponents */
 131         wprintf("Iterating through VCALENDARs<BR>\n");
 132         for (c = icalcomponent_get_first_component(cal, ICAL_VCALENDAR_COMPONENT);
 133             (c != 0);
 134             c = icalcomponent_get_next_component(cal, ICAL_VCALENDAR_COMPONENT)) {
 135                 cal_process_subcomponent(c);
 136                 --num_subcomponents;
 137         }
 138
 139         /* Iterate through all subcomponents */
 140         wprintf("Iterating through VFREEBUSYs<BR>\n");
 141         for (c = icalcomponent_get_first_component(cal, ICAL_VFREEBUSY_COMPONENT);
 142             (c != 0);
 143             c = icalcomponent_get_next_component(cal, ICAL_VFREEBUSY_COMPONENT)) {
 144                 cal_process_subcomponent(c);
 145                 --num_subcomponents;
 146         }
 147
 148         /* Iterate through all subcomponents */
 149         wprintf("Iterating through VALARMs<BR>\n");
 150         for (c = icalcomponent_get_first_component(cal, ICAL_VALARM_COMPONENT);
 151             (c != 0);
 152             c = icalcomponent_get_next_component(cal, ICAL_VALARM_COMPONENT)) {
 153                 cal_process_subcomponent(c);
 154                 --num_subcomponents;
 155         }
 156
 157         /* Iterate through all subcomponents */
 158         wprintf("Iterating through VTIMEZONEs<BR>\n");
 159         for (c = icalcomponent_get_first_component(cal, ICAL_VTIMEZONE_COMPONENT);
 160             (c != 0);
 161             c = icalcomponent_get_next_component(cal, ICAL_VTIMEZONE_COMPONENT)) {
 162                 cal_process_subcomponent(c);
 163                 --num_subcomponents;
 164         }
 165
 166         /* Iterate through all subcomponents */
 167         wprintf("Iterating through VSCHEDULEs<BR>\n");
 168         for (c = icalcomponent_get_first_component(cal, ICAL_VSCHEDULE_COMPONENT);
 169             (c != 0);
 170             c = icalcomponent_get_next_component(cal, ICAL_VSCHEDULE_COMPONENT)) {
 171                 cal_process_subcomponent(c);
 172                 --num_subcomponents;
 173         }
 174
 175         /* Iterate through all subcomponents */
 176         wprintf("Iterating through VQUERYs<BR>\n");
 177         for (c = icalcomponent_get_first_component(cal, ICAL_VQUERY_COMPONENT);
 178             (c != 0);
 179             c = icalcomponent_get_next_component(cal, ICAL_VQUERY_COMPONENT)) {
 180                 cal_process_subcomponent(c);
 181                 --num_subcomponents;
 182         }
 183
 184         /* Iterate through all subcomponents */
 185         wprintf("Iterating through VCARs<BR>\n");
 186         for (c = icalcomponent_get_first_component(cal, ICAL_VCAR_COMPONENT);
 187             (c != 0);
 188             c = icalcomponent_get_next_component(cal, ICAL_VCAR_COMPONENT)) {
 189                 cal_process_subcomponent(c);
 190                 --num_subcomponents;
 191         }
 192
 193         /* Iterate through all subcomponents */
 194         wprintf("Iterating through VCOMMANDs<BR>\n");
 195         for (c = icalcomponent_get_first_component(cal, ICAL_VCOMMAND_COMPONENT);
 196             (c != 0);
 197             c = icalcomponent_get_next_component(cal, ICAL_VCOMMAND_COMPONENT)) {
 198                 cal_process_subcomponent(c);
 199                 --num_subcomponents;
 200         }
 201
 202         if (num_subcomponents != 0) {
 203                 wprintf("Warning: %d subcomponents unhandled<BR>\n",
 204                         num_subcomponents);
 205         }
 206
 207         wprintf("cal_process_object() exiting<BR>\n");
 208 }
 209
 210
 211 /*
 212  * Deserialize a calendar object in a message so it can be processed.
 213  * (This is the main entry point for these things)
 214  */
 215 void cal_process_attachment(char *part_source) {
 216         icalcomponent *cal;
 217
 218         wprintf("Processing calendar attachment<BR>\n");
 219         cal = icalcomponent_new_from_string(part_source);
 220
 221         if (cal == NULL) {
 222                 wprintf("Error parsing calendar object: %s<BR>\n",
 223                         icalerror_strerror(icalerrno));
 224                 return;
 225         }
 226
 227         cal_process_object(cal);
 228
 229         /* Free the memory we obtained from libical's constructor */
 230         icalcomponent_free(cal);
 231 }
 232
 233 /*****************************************************************************/
 234
 235
 236
 237 /*
 238  * Display handlers for message reading
 239  */
 240
 241
 242
 243 /*
 244  * If we're reading calendar items, just store them for now.  We have to
 245  * sort and re-output them later when we draw the calendar.
 246  */
 247 void display_individual_cal(icalcomponent *cal, long msgnum) {
 248
 249         WC->num_cal += 1;
 250
 251         WC->disp_cal = realloc(WC->disp_cal,
 252                         (sizeof(icalcomponent *) * WC->num_cal) );
 253         WC->disp_cal[WC->num_cal - 1] = icalcomponent_new_clone(cal);
 254
 255         WC->cal_msgnum = realloc(WC->cal_msgnum,
 256                         (sizeof(long) * WC->num_cal) );
 257         WC->cal_msgnum[WC->num_cal - 1] = msgnum;
 258 }
 259
 260
 261
 262 /*
 263  * Display a task in the task list
 264  */
 265 void display_individual_task(icalcomponent *vtodo, long msgnum) {
 266         icalproperty *p;
 267
 268         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 269         wprintf("<LI><A HREF=\"/display_edit_task?msgnum=%ld\">", msgnum);
 270         if (p != NULL) {
 271                 escputs((char *)icalproperty_get_comment(p));
 272         }
 273         wprintf("</A>\n");
 274 }
 275
 276
 277 /*
 278  * Display a task by itself (for editing)
 279  */
 280 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 281         icalcomponent *vtodo;
 282         icalproperty *p;
 283         struct icaltimetype t;
 284         time_t now;
 285         int created_new_vtodo = 0;
 286
 287         now = time(NULL);
 288
 289         if (supplied_vtodo != NULL) {
 290                 vtodo = supplied_vtodo;
 291         }
 292         else {
 293                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 294                 created_new_vtodo = 1;
 295         }
 296
 297         output_headers(3);
 298         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=007700><TR><TD>"
 299                 "<FONT SIZE=+1 COLOR=\"FFFFFF\""
 300                 "<B>Edit task</B>"
 301                 "</FONT></TD></TR></TABLE><BR>\n"
 302         );
 303
 304         wprintf("<FORM METHOD=\"POST\" ACTION=\"/save_task\">\n");
 305         wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
 306                 msgnum);
 307
 308         wprintf("Summary: "
 309                 "<INPUT TYPE=\"text\" NAME=\"summary\" "
 310                 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
 311         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 312         if (p != NULL) {
 313                 escputs((char *)icalproperty_get_comment(p));
 314         }
 315         wprintf("\"><BR>\n");
 316
 317         wprintf("Start date: ");
 318         p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
 319         if (p != NULL) {
 320                 t = icalproperty_get_dtstart(p);
 321         }
 322         else {
 323                 t = icaltime_from_timet(now, 0);
 324         }
 325         display_icaltimetype_as_webform(&t, "dtstart");
 326         wprintf("<BR>\n");
 327
 328         wprintf("Due date: ");
 329         p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
 330         if (p != NULL) {
 331                 t = icalproperty_get_due(p);
 332         }
 333         else {
 334                 t = icaltime_from_timet(now, 0);
 335         }
 336         display_icaltimetype_as_webform(&t, "due");
 337         wprintf("<BR>\n");
 338
 339         wprintf("<CENTER><TEXTAREA NAME=\"description\" wrap=soft "
 340                 "ROWS=10 COLS=80 WIDTH=80>\n"
 341         );
 342         p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
 343         if (p != NULL) {
 344                 escputs((char *)icalproperty_get_comment(p));
 345         }
 346         wprintf("</TEXTAREA><BR>\n");
 347
 348         wprintf("<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Save\">"
 349                 "&nbsp;&nbsp;"
 350                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Delete\">\n"
 351                 "&nbsp;&nbsp;"
 352                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Cancel\">\n"
 353                 "</CENTER>\n"
 354         );
 355
 356         wprintf("</FORM>\n");
 357
 358         wDumpContent(1);
 359
 360         if (created_new_vtodo) {
 361                 icalcomponent_free(vtodo);
 362         }
 363 }
 364
 365 /*
 366  * Save an edited task
 367  */
 368 void save_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 369         char buf[SIZ];
 370         int delete_existing = 0;
 371         icalproperty *prop;
 372         icalcomponent *vtodo;
 373         int created_new_vtodo = 0;
 374
 375         if (supplied_vtodo != NULL) {
 376                 vtodo = supplied_vtodo;
 377         }
 378         else {
 379                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 380                 created_new_vtodo = 1;
 381         }
 382
 383         if (!strcasecmp(bstr("sc"), "Save")) {
 384
 385                 /* Replace values in the component with ones from the form */
 386
 387                 while (prop = icalcomponent_get_first_property(vtodo,
 388                       ICAL_SUMMARY_PROPERTY), prop != NULL) {
 389                         icalcomponent_remove_property(vtodo, prop);
 390                 }
 391                 icalcomponent_add_property(vtodo,
 392                         icalproperty_new_summary(bstr("summary")));
 393
 394                 while (prop = icalcomponent_get_first_property(vtodo,
 395                       ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
 396                         icalcomponent_remove_property(vtodo, prop);
 397                 }
 398                 icalcomponent_add_property(vtodo,
 399                         icalproperty_new_description(bstr("description")));
 400
 401                 while (prop = icalcomponent_get_first_property(vtodo,
 402                       ICAL_DTSTART_PROPERTY), prop != NULL) {
 403                         icalcomponent_remove_property(vtodo, prop);
 404                 }
 405                 icalcomponent_add_property(vtodo,
 406                         icalproperty_new_dtstart(
 407                                 icaltime_from_webform("dtstart")
 408                         )
 409                 );
 410
 411                 while (prop = icalcomponent_get_first_property(vtodo,
 412                       ICAL_DUE_PROPERTY), prop != NULL) {
 413                         icalcomponent_remove_property(vtodo, prop);
 414                 }
 415                 icalcomponent_add_property(vtodo,
 416                         icalproperty_new_due(
 417                                 icaltime_from_webform("due")
 418                         )
 419                 );
 420
 421                 /* Serialize it and save it to the message base */
 422                 serv_puts("ENT0 1|||4");
 423                 serv_gets(buf);
 424                 if (buf[0] == '4') {
 425                         serv_puts("Content-type: text/calendar");
 426                         serv_puts("");
 427                         serv_puts(icalcomponent_as_ical_string(vtodo));
 428                         serv_puts("000");
 429                         delete_existing = 1;
 430                 }
 431         }
 432
 433         /*
 434          * If the user clicked 'Delete' then delete it, period.
 435          */
 436         if (!strcasecmp(bstr("sc"), "Delete")) {
 437                 delete_existing = 1;
 438         }
 439
 440         if ( (delete_existing) && (msgnum > 0L) ) {
 441                 serv_printf("DELE %ld", atol(bstr("msgnum")));
 442                 serv_gets(buf);
 443         }
 444
 445         if (created_new_vtodo) {
 446                 icalcomponent_free(vtodo);
 447         }
 448
 449         /* Go back to the task list */
 450         readloop("readfwd");
 451 }
 452
 453
 454
 455 /*
 456  * Code common to all display handlers.  Given a message number and a MIME
 457  * type, we load the message and hunt for that MIME type.  If found, we load
 458  * the relevant part, deserialize it into a libical component, filter it for
 459  * the requested object type, and feed it to the specified handler.
 460  */
 461 void display_using_handler(long msgnum,
 462                         char *mimetype,
 463                         icalcomponent_kind which_kind,
 464                         void (*callback)(icalcomponent *, long)
 465         ) {
 466         char buf[SIZ];
 467         char mime_partnum[SIZ];
 468         char mime_filename[SIZ];
 469         char mime_content_type[SIZ];
 470         char mime_disposition[SIZ];
 471         int mime_length;
 472         char relevant_partnum[SIZ];
 473         char *relevant_source = NULL;
 474         icalcomponent *cal, *c;
 475
 476         sprintf(buf, "MSG0 %ld|1", msgnum);     /* ask for headers only */
 477         serv_puts(buf);
 478         serv_gets(buf);
 479         if (buf[0] != '1') return;
 480
 481         while (serv_gets(buf), strcmp(buf, "000")) {
 482                 if (!strncasecmp(buf, "part=", 5)) {
 483                         extract(mime_filename, &buf[5], 1);
 484                         extract(mime_partnum, &buf[5], 2);
 485                         extract(mime_disposition, &buf[5], 3);
 486                         extract(mime_content_type, &buf[5], 4);
 487                         mime_length = extract_int(&buf[5], 5);
 488
 489                         if (!strcasecmp(mime_content_type, "text/calendar")) {
 490                                 strcpy(relevant_partnum, mime_partnum);
 491                         }
 492
 493                 }
 494         }
 495
 496         if (strlen(relevant_partnum) > 0) {
 497                 relevant_source = load_mimepart(msgnum, relevant_partnum);
 498                 if (relevant_source != NULL) {
 499
 500                         cal = icalcomponent_new_from_string(relevant_source);
 501                         if (cal != NULL) {
 502
 503                                 /* Simple components of desired type */
 504                                 if (icalcomponent_isa(cal) == which_kind) {
 505                                         callback(cal, msgnum);
 506                                 }
 507
 508                                 /* Subcomponents of desired type */
 509                                 for (c = icalcomponent_get_first_component(cal,
 510                                     which_kind);
 511                                     (c != 0);
 512                                     c = icalcomponent_get_next_component(cal,
 513                                     which_kind)) {
 514                                         callback(c, msgnum);
 515                                 }
 516                                 icalcomponent_free(cal);
 517                         }
 518                         free(relevant_source);
 519                 }
 520         }
 521
 522 }
 523
 524 void display_calendar(long msgnum) {
 525         display_using_handler(msgnum, "text/calendar",
 526                                 ICAL_VEVENT_COMPONENT,
 527                                 display_individual_cal);
 528 }
 529
 530 void display_task(long msgnum) {
 531         display_using_handler(msgnum, "text/calendar",
 532                                 ICAL_VTODO_COMPONENT,
 533                                 display_individual_task);
 534 }
 535
 536 void display_edit_task(void) {
 537         long msgnum = 0L;
 538
 539         msgnum = atol(bstr("msgnum"));
 540         if (msgnum > 0L) {
 541                 /* existing task */
 542                 display_using_handler(msgnum, "text/calendar",
 543                                 ICAL_VTODO_COMPONENT,
 544                                 display_edit_individual_task);
 545         }
 546         else {
 547                 /* new task */
 548                 display_edit_individual_task(NULL, 0L);
 549         }
 550 }
 551
 552 void save_task(void) {
 553         long msgnum = 0L;
 554
 555         msgnum = atol(bstr("msgnum"));
 556         if (msgnum > 0L) {
 557                 display_using_handler(msgnum, "text/calendar",
 558                                 ICAL_VTODO_COMPONENT,
 559                                 save_individual_task);
 560         }
 561         else {
 562                 save_individual_task(NULL, 0L);
 563         }
 564 }
 565
 566 void display_edit_event(void) {
 567         long msgnum = 0L;
 568
 569         msgnum = atol(bstr("msgnum"));
 570         if (msgnum > 0L) {
 571                 /* existing event */
 572                 display_using_handler(msgnum, "text/calendar",
 573                                 ICAL_VEVENT_COMPONENT,
 574                                 display_edit_individual_event);
 575         }
 576         else {
 577                 /* new event */
 578                 display_edit_individual_event(NULL, 0L);
 579         }
 580 }
 581
 582 void save_event(void) {
 583         long msgnum = 0L;
 584
 585         msgnum = atol(bstr("msgnum"));
 586
 587         if (msgnum > 0L) {
 588                 display_using_handler(msgnum, "text/calendar",
 589                                 ICAL_VEVENT_COMPONENT,
 590                                 save_individual_event);
 591         }
 592         else {
 593                 save_individual_event(NULL, 0L);
 594         }
 595 }
 596
 597 #endif /* HAVE_ICAL_H */