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>Cannot display calendar item</i><br>\n");
  48 }
  49
  50 void display_task(long msgnum) {
  51         wprintf("<i>Cannot display item from task list</i><br>\n");
  52 }
  53
  54 #else /* HAVE_ICAL_H */
  55
  56
  57 /******   End of handler stubs.  Everything below this line is real.   ******/
  58
  59
  60 /*
  61  * Process a single calendar component.
  62  * It won't be a compound component at this point because those have
  63  * already been broken down by cal_process_object().
  64  */
  65 void cal_process_subcomponent(icalcomponent *cal) {
  66         wprintf("cal_process_subcomponent() called<BR>\n");
  67         wprintf("cal_process_subcomponent() exiting<BR>\n");
  68 }
  69
  70
  71
  72
  73
  74 /*
  75  * Process a calendar object
  76  * ...at this point it's already been deserialized by cal_process_attachment()
  77  */
  78 void cal_process_object(icalcomponent *cal) {
  79         icalcomponent *c;
  80         int num_subcomponents = 0;
  81
  82         wprintf("cal_process_object() called<BR>\n");
  83
  84         /* Iterate through all subcomponents */
  85         wprintf("Iterating through all sub-components<BR>\n");
  86         for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
  87             (c != 0);
  88             c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
  89                 cal_process_subcomponent(c);
  90                 ++num_subcomponents;
  91         }
  92
  93         /* Iterate through all subcomponents */
  94         wprintf("Iterating through VEVENTs<BR>\n");
  95         for (c = icalcomponent_get_first_component(cal, ICAL_VEVENT_COMPONENT);
  96             (c != 0);
  97             c = icalcomponent_get_next_component(cal, ICAL_VEVENT_COMPONENT)) {
  98                 cal_process_subcomponent(c);
  99                 --num_subcomponents;
 100         }
 101
 102         /* Iterate through all subcomponents */
 103         wprintf("Iterating through VTODOs<BR>\n");
 104         for (c = icalcomponent_get_first_component(cal, ICAL_VTODO_COMPONENT);
 105             (c != 0);
 106             c = icalcomponent_get_next_component(cal, ICAL_VTODO_COMPONENT)) {
 107                 cal_process_subcomponent(c);
 108                 --num_subcomponents;
 109         }
 110
 111         /* Iterate through all subcomponents */
 112         wprintf("Iterating through VJOURNALs<BR>\n");
 113         for (c = icalcomponent_get_first_component(cal, ICAL_VJOURNAL_COMPONENT);
 114             (c != 0);
 115             c = icalcomponent_get_next_component(cal, ICAL_VJOURNAL_COMPONENT)) {
 116                 cal_process_subcomponent(c);
 117                 --num_subcomponents;
 118         }
 119
 120         /* Iterate through all subcomponents */
 121         wprintf("Iterating through VCALENDARs<BR>\n");
 122         for (c = icalcomponent_get_first_component(cal, ICAL_VCALENDAR_COMPONENT);
 123             (c != 0);
 124             c = icalcomponent_get_next_component(cal, ICAL_VCALENDAR_COMPONENT)) {
 125                 cal_process_subcomponent(c);
 126                 --num_subcomponents;
 127         }
 128
 129         /* Iterate through all subcomponents */
 130         wprintf("Iterating through VFREEBUSYs<BR>\n");
 131         for (c = icalcomponent_get_first_component(cal, ICAL_VFREEBUSY_COMPONENT);
 132             (c != 0);
 133             c = icalcomponent_get_next_component(cal, ICAL_VFREEBUSY_COMPONENT)) {
 134                 cal_process_subcomponent(c);
 135                 --num_subcomponents;
 136         }
 137
 138         /* Iterate through all subcomponents */
 139         wprintf("Iterating through VALARMs<BR>\n");
 140         for (c = icalcomponent_get_first_component(cal, ICAL_VALARM_COMPONENT);
 141             (c != 0);
 142             c = icalcomponent_get_next_component(cal, ICAL_VALARM_COMPONENT)) {
 143                 cal_process_subcomponent(c);
 144                 --num_subcomponents;
 145         }
 146
 147         /* Iterate through all subcomponents */
 148         wprintf("Iterating through VTIMEZONEs<BR>\n");
 149         for (c = icalcomponent_get_first_component(cal, ICAL_VTIMEZONE_COMPONENT);
 150             (c != 0);
 151             c = icalcomponent_get_next_component(cal, ICAL_VTIMEZONE_COMPONENT)) {
 152                 cal_process_subcomponent(c);
 153                 --num_subcomponents;
 154         }
 155
 156         /* Iterate through all subcomponents */
 157         wprintf("Iterating through VSCHEDULEs<BR>\n");
 158         for (c = icalcomponent_get_first_component(cal, ICAL_VSCHEDULE_COMPONENT);
 159             (c != 0);
 160             c = icalcomponent_get_next_component(cal, ICAL_VSCHEDULE_COMPONENT)) {
 161                 cal_process_subcomponent(c);
 162                 --num_subcomponents;
 163         }
 164
 165         /* Iterate through all subcomponents */
 166         wprintf("Iterating through VQUERYs<BR>\n");
 167         for (c = icalcomponent_get_first_component(cal, ICAL_VQUERY_COMPONENT);
 168             (c != 0);
 169             c = icalcomponent_get_next_component(cal, ICAL_VQUERY_COMPONENT)) {
 170                 cal_process_subcomponent(c);
 171                 --num_subcomponents;
 172         }
 173
 174         /* Iterate through all subcomponents */
 175         wprintf("Iterating through VCARs<BR>\n");
 176         for (c = icalcomponent_get_first_component(cal, ICAL_VCAR_COMPONENT);
 177             (c != 0);
 178             c = icalcomponent_get_next_component(cal, ICAL_VCAR_COMPONENT)) {
 179                 cal_process_subcomponent(c);
 180                 --num_subcomponents;
 181         }
 182
 183         /* Iterate through all subcomponents */
 184         wprintf("Iterating through VCOMMANDs<BR>\n");
 185         for (c = icalcomponent_get_first_component(cal, ICAL_VCOMMAND_COMPONENT);
 186             (c != 0);
 187             c = icalcomponent_get_next_component(cal, ICAL_VCOMMAND_COMPONENT)) {
 188                 cal_process_subcomponent(c);
 189                 --num_subcomponents;
 190         }
 191
 192         if (num_subcomponents != 0) {
 193                 wprintf("Warning: %d subcomponents unhandled<BR>\n",
 194                         num_subcomponents);
 195         }
 196
 197         wprintf("cal_process_object() exiting<BR>\n");
 198 }
 199
 200
 201 /*
 202  * Deserialize a calendar object in a message so it can be processed.
 203  * (This is the main entry point for these things)
 204  */
 205 void cal_process_attachment(char *part_source) {
 206         icalcomponent *cal;
 207
 208         wprintf("Processing calendar attachment<BR>\n");
 209         cal = icalcomponent_new_from_string(part_source);
 210
 211         if (cal == NULL) {
 212                 wprintf("Error parsing calendar object: %s<BR>\n",
 213                         icalerror_strerror(icalerrno));
 214                 return;
 215         }
 216
 217         cal_process_object(cal);
 218
 219         /* Free the memory we obtained from libical's constructor */
 220         icalcomponent_free(cal);
 221 }
 222
 223 /*****************************************************************************/
 224
 225
 226
 227 /*
 228  * Display handlers for message reading
 229  */
 230
 231
 232
 233 /*
 234  * If we're reading calendar items, just store them for now.  We have to
 235  * sort and re-output them later when we draw the calendar.
 236  */
 237 void display_individual_cal(icalcomponent *cal, long msgnum) {
 238
 239         WC->num_cal += 1;
 240
 241         WC->disp_cal = realloc(WC->disp_cal,
 242                         (sizeof(icalcomponent *) * WC->num_cal) );
 243         WC->disp_cal[WC->num_cal - 1] = icalcomponent_new_clone(cal);
 244
 245         WC->cal_msgnum = realloc(WC->cal_msgnum,
 246                         (sizeof(long) * WC->num_cal) );
 247         WC->cal_msgnum[WC->num_cal - 1] = msgnum;
 248 }
 249
 250
 251
 252 /*
 253  * Display a task in the task list
 254  */
 255 void display_individual_task(icalcomponent *vtodo, long msgnum) {
 256         icalproperty *p;
 257
 258         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 259         wprintf("<LI><A HREF=\"/display_edit_task?msgnum=%ld\">", msgnum);
 260         if (p != NULL) {
 261                 escputs((char *)icalproperty_get_comment(p));
 262         }
 263         wprintf("</A>\n");
 264 }
 265
 266
 267 /*
 268  * Display a task by itself (for editing)
 269  */
 270 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 271         icalcomponent *vtodo;
 272         icalproperty *p;
 273         struct icaltimetype t;
 274         time_t now;
 275         int created_new_vtodo = 0;
 276
 277         now = time(NULL);
 278
 279         if (supplied_vtodo != NULL) {
 280                 vtodo = supplied_vtodo;
 281         }
 282         else {
 283                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 284                 created_new_vtodo = 1;
 285         }
 286
 287         output_headers(3);
 288         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=007700><TR><TD>"
 289                 "<FONT SIZE=+1 COLOR=\"FFFFFF\""
 290                 "<B>Edit task</B>"
 291                 "</FONT></TD></TR></TABLE><BR>\n"
 292         );
 293
 294         wprintf("<FORM METHOD=\"POST\" ACTION=\"/save_task\">\n");
 295         wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
 296                 msgnum);
 297
 298         wprintf("Summary: "
 299                 "<INPUT TYPE=\"text\" NAME=\"summary\" "
 300                 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
 301         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 302         if (p != NULL) {
 303                 escputs((char *)icalproperty_get_comment(p));
 304         }
 305         wprintf("\"><BR>\n");
 306
 307         wprintf("Start date: ");
 308         p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
 309         if (p != NULL) {
 310                 t = icalproperty_get_dtstart(p);
 311         }
 312         else {
 313                 t = icaltime_from_timet(now, 0);
 314         }
 315         display_icaltimetype_as_webform(&t, "dtstart");
 316         wprintf("<BR>\n");
 317
 318         wprintf("Due date: ");
 319         p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
 320         if (p != NULL) {
 321                 t = icalproperty_get_due(p);
 322         }
 323         else {
 324                 t = icaltime_from_timet(now, 0);
 325         }
 326         display_icaltimetype_as_webform(&t, "due");
 327         wprintf("<BR>\n");
 328
 329         wprintf("<CENTER><TEXTAREA NAME=\"description\" wrap=soft "
 330                 "ROWS=10 COLS=80 WIDTH=80>\n"
 331         );
 332         p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
 333         if (p != NULL) {
 334                 escputs((char *)icalproperty_get_comment(p));
 335         }
 336         wprintf("</TEXTAREA><BR>\n");
 337
 338         wprintf("<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Save\">"
 339                 "&nbsp;&nbsp;"
 340                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Delete\">\n"
 341                 "&nbsp;&nbsp;"
 342                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Cancel\">\n"
 343                 "</CENTER>\n"
 344         );
 345
 346         wprintf("</FORM>\n");
 347
 348         wDumpContent(1);
 349
 350         if (created_new_vtodo) {
 351                 icalcomponent_free(vtodo);
 352         }
 353 }
 354
 355 /*
 356  * Save an edited task
 357  */
 358 void save_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 359         char buf[SIZ];
 360         int delete_existing = 0;
 361         icalproperty *prop;
 362         icalcomponent *vtodo;
 363         int created_new_vtodo = 0;
 364
 365         if (supplied_vtodo != NULL) {
 366                 vtodo = supplied_vtodo;
 367         }
 368         else {
 369                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 370                 created_new_vtodo = 1;
 371         }
 372
 373         if (!strcasecmp(bstr("sc"), "Save")) {
 374
 375                 /* Replace values in the component with ones from the form */
 376
 377                 while (prop = icalcomponent_get_first_property(vtodo,
 378                       ICAL_SUMMARY_PROPERTY), prop != NULL) {
 379                         icalcomponent_remove_property(vtodo, prop);
 380                 }
 381                 icalcomponent_add_property(vtodo,
 382                         icalproperty_new_summary(bstr("summary")));
 383
 384                 while (prop = icalcomponent_get_first_property(vtodo,
 385                       ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
 386                         icalcomponent_remove_property(vtodo, prop);
 387                 }
 388                 icalcomponent_add_property(vtodo,
 389                         icalproperty_new_description(bstr("description")));
 390
 391                 while (prop = icalcomponent_get_first_property(vtodo,
 392                       ICAL_DTSTART_PROPERTY), prop != NULL) {
 393                         icalcomponent_remove_property(vtodo, prop);
 394                 }
 395                 icalcomponent_add_property(vtodo,
 396                         icalproperty_new_dtstart(
 397                                 icaltime_from_webform("dtstart")
 398                         )
 399                 );
 400
 401                 while (prop = icalcomponent_get_first_property(vtodo,
 402                       ICAL_DUE_PROPERTY), prop != NULL) {
 403                         icalcomponent_remove_property(vtodo, prop);
 404                 }
 405                 icalcomponent_add_property(vtodo,
 406                         icalproperty_new_due(
 407                                 icaltime_from_webform("due")
 408                         )
 409                 );
 410
 411                 /* Serialize it and save it to the message base */
 412                 serv_puts("ENT0 1|||4");
 413                 serv_gets(buf);
 414                 if (buf[0] == '4') {
 415                         serv_puts("Content-type: text/calendar");
 416                         serv_puts("");
 417                         serv_puts(icalcomponent_as_ical_string(vtodo));
 418                         serv_puts("000");
 419                         delete_existing = 1;
 420                 }
 421         }
 422
 423         /*
 424          * If the user clicked 'Delete' then delete it, period.
 425          */
 426         if (!strcasecmp(bstr("sc"), "Delete")) {
 427                 delete_existing = 1;
 428         }
 429
 430         if ( (delete_existing) && (msgnum > 0L) ) {
 431                 serv_printf("DELE %ld", atol(bstr("msgnum")));
 432                 serv_gets(buf);
 433         }
 434
 435         if (created_new_vtodo) {
 436                 icalcomponent_free(vtodo);
 437         }
 438
 439         /* Go back to the task list */
 440         readloop("readfwd");
 441 }
 442
 443
 444
 445 /*
 446  * Code common to all display handlers.  Given a message number and a MIME
 447  * type, we load the message and hunt for that MIME type.  If found, we load
 448  * the relevant part, deserialize it into a libical component, filter it for
 449  * the requested object type, and feed it to the specified handler.
 450  */
 451 void display_using_handler(long msgnum,
 452                         char *mimetype,
 453                         icalcomponent_kind which_kind,
 454                         void (*callback)(icalcomponent *, long)
 455         ) {
 456         char buf[SIZ];
 457         char mime_partnum[SIZ];
 458         char mime_filename[SIZ];
 459         char mime_content_type[SIZ];
 460         char mime_disposition[SIZ];
 461         int mime_length;
 462         char relevant_partnum[SIZ];
 463         char *relevant_source = NULL;
 464         icalcomponent *cal, *c;
 465
 466         sprintf(buf, "MSG0 %ld|1", msgnum);     /* ask for headers only */
 467         serv_puts(buf);
 468         serv_gets(buf);
 469         if (buf[0] != '1') return;
 470
 471         while (serv_gets(buf), strcmp(buf, "000")) {
 472                 if (!strncasecmp(buf, "part=", 5)) {
 473                         extract(mime_filename, &buf[5], 1);
 474                         extract(mime_partnum, &buf[5], 2);
 475                         extract(mime_disposition, &buf[5], 3);
 476                         extract(mime_content_type, &buf[5], 4);
 477                         mime_length = extract_int(&buf[5], 5);
 478
 479                         if (!strcasecmp(mime_content_type, "text/calendar")) {
 480                                 strcpy(relevant_partnum, mime_partnum);
 481                         }
 482
 483                 }
 484         }
 485
 486         if (strlen(relevant_partnum) > 0) {
 487                 relevant_source = load_mimepart(msgnum, relevant_partnum);
 488                 if (relevant_source != NULL) {
 489
 490                         cal = icalcomponent_new_from_string(relevant_source);
 491                         if (cal != NULL) {
 492
 493                                 /* Simple components of desired type */
 494                                 if (icalcomponent_isa(cal) == which_kind) {
 495                                         callback(cal, msgnum);
 496                                 }
 497
 498                                 /* Subcomponents of desired type */
 499                                 for (c = icalcomponent_get_first_component(cal,
 500                                     which_kind);
 501                                     (c != 0);
 502                                     c = icalcomponent_get_next_component(cal,
 503                                     which_kind)) {
 504                                         callback(c, msgnum);
 505                                 }
 506                                 icalcomponent_free(cal);
 507                         }
 508                         free(relevant_source);
 509                 }
 510         }
 511
 512 }
 513
 514 void display_calendar(long msgnum) {
 515         display_using_handler(msgnum, "text/calendar",
 516                                 ICAL_VEVENT_COMPONENT,
 517                                 display_individual_cal);
 518 }
 519
 520 void display_task(long msgnum) {
 521         display_using_handler(msgnum, "text/calendar",
 522                                 ICAL_VTODO_COMPONENT,
 523                                 display_individual_task);
 524 }
 525
 526 void display_edit_task(void) {
 527         long msgnum = 0L;
 528
 529         msgnum = atol(bstr("msgnum"));
 530         if (msgnum > 0L) {
 531                 /* existing task */
 532                 display_using_handler(msgnum, "text/calendar",
 533                                 ICAL_VTODO_COMPONENT,
 534                                 display_edit_individual_task);
 535         }
 536         else {
 537                 /* new task */
 538                 display_edit_individual_task(NULL, 0L);
 539         }
 540 }
 541
 542 void save_task(void) {
 543         long msgnum = 0L;
 544
 545         msgnum = atol(bstr("msgnum"));
 546         if (msgnum > 0L) {
 547                 display_using_handler(msgnum, "text/calendar",
 548                                 ICAL_VTODO_COMPONENT,
 549                                 save_individual_task);
 550         }
 551         else {
 552                 save_individual_task(NULL, 0L);
 553         }
 554 }
 555
 556 void display_edit_event(void) {
 557         long msgnum = 0L;
 558
 559         msgnum = atol(bstr("msgnum"));
 560         if (msgnum > 0L) {
 561                 /* existing event */
 562                 display_using_handler(msgnum, "text/calendar",
 563                                 ICAL_VEVENT_COMPONENT,
 564                                 display_edit_individual_event);
 565         }
 566         else {
 567                 /* new event */
 568                 display_edit_individual_event(NULL, 0L);
 569         }
 570 }
 571
 572 void save_event(void) {
 573         long msgnum = 0L;
 574
 575         msgnum = atol(bstr("msgnum"));
 576
 577         if (msgnum > 0L) {
 578                 display_using_handler(msgnum, "text/calendar",
 579                                 ICAL_VEVENT_COMPONENT,
 580                                 save_individual_event);
 581         }
 582         else {
 583                 save_individual_event(NULL, 0L);
 584         }
 585 }
 586
 587 #endif /* HAVE_ICAL_H */