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         WC->disp_cal = realloc(WC->disp_cal,
 241                         (sizeof(icalcomponent *) * WC->num_cal) );
 242         WC->disp_cal[WC->num_cal - 1] = icalcomponent_new_clone(cal);
 243 }
 244
 245
 246
 247 /*
 248  * Display a task in the task list
 249  */
 250 void display_individual_task(icalcomponent *vtodo, long msgnum) {
 251         icalproperty *p;
 252
 253         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 254         wprintf("<LI><A HREF=\"/display_edit_task?msgnum=%ld\">", msgnum);
 255         if (p != NULL) {
 256                 escputs((char *)icalproperty_get_comment(p));
 257         }
 258         wprintf("</A>\n");
 259 }
 260
 261
 262 /*
 263  * Display a task by itself (for editing)
 264  */
 265 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 266         icalcomponent *vtodo;
 267         icalproperty *p;
 268         struct icaltimetype t;
 269         time_t now;
 270         int created_new_vtodo = 0;
 271
 272         now = time(NULL);
 273
 274         if (supplied_vtodo != NULL) {
 275                 vtodo = supplied_vtodo;
 276         }
 277         else {
 278                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 279                 created_new_vtodo = 1;
 280         }
 281
 282         output_headers(3);
 283         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=007700><TR><TD>"
 284                 "<FONT SIZE=+1 COLOR=\"FFFFFF\""
 285                 "<B>Edit task</B>"
 286                 "</FONT></TD></TR></TABLE><BR>\n"
 287         );
 288
 289         wprintf("<FORM METHOD=\"POST\" ACTION=\"/save_task\">\n");
 290         wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
 291                 msgnum);
 292
 293         wprintf("Summary: "
 294                 "<INPUT TYPE=\"text\" NAME=\"summary\" "
 295                 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
 296         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 297         if (p != NULL) {
 298                 escputs((char *)icalproperty_get_comment(p));
 299         }
 300         wprintf("\"><BR>\n");
 301
 302         wprintf("Start date: ");
 303         p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
 304         if (p != NULL) {
 305                 t = icalproperty_get_dtstart(p);
 306         }
 307         else {
 308                 t = icaltime_from_timet(now, 0);
 309         }
 310         display_icaltimetype_as_webform(&t, "dtstart");
 311         wprintf("<BR>\n");
 312
 313         wprintf("Due date: ");
 314         p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
 315         if (p != NULL) {
 316                 t = icalproperty_get_due(p);
 317         }
 318         else {
 319                 t = icaltime_from_timet(now, 0);
 320         }
 321         display_icaltimetype_as_webform(&t, "due");
 322         wprintf("<BR>\n");
 323
 324         wprintf("<CENTER><TEXTAREA NAME=\"description\" wrap=soft "
 325                 "ROWS=10 COLS=80 WIDTH=80>\n"
 326         );
 327         p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
 328         if (p != NULL) {
 329                 escputs((char *)icalproperty_get_comment(p));
 330         }
 331         wprintf("</TEXTAREA><BR>\n");
 332
 333         wprintf("<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Save\">"
 334                 "&nbsp;&nbsp;"
 335                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Delete\">\n"
 336                 "&nbsp;&nbsp;"
 337                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Cancel\">\n"
 338                 "</CENTER>\n"
 339         );
 340
 341         wprintf("</FORM>\n");
 342
 343         wDumpContent(1);
 344
 345         if (created_new_vtodo) {
 346                 icalcomponent_free(vtodo);
 347         }
 348 }
 349
 350 /*
 351  * Save an edited task
 352  */
 353 void save_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 354         char buf[SIZ];
 355         int delete_existing = 0;
 356         icalproperty *prop;
 357         icalcomponent *vtodo;
 358         int created_new_vtodo = 0;
 359
 360         if (supplied_vtodo != NULL) {
 361                 vtodo = supplied_vtodo;
 362         }
 363         else {
 364                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 365                 created_new_vtodo = 1;
 366         }
 367
 368         if (!strcasecmp(bstr("sc"), "Save")) {
 369
 370                 /* Replace values in the component with ones from the form */
 371
 372                 while (prop = icalcomponent_get_first_property(vtodo,
 373                       ICAL_SUMMARY_PROPERTY), prop != NULL) {
 374                         icalcomponent_remove_property(vtodo, prop);
 375                 }
 376                 icalcomponent_add_property(vtodo,
 377                         icalproperty_new_summary(bstr("summary")));
 378
 379                 while (prop = icalcomponent_get_first_property(vtodo,
 380                       ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
 381                         icalcomponent_remove_property(vtodo, prop);
 382                 }
 383                 icalcomponent_add_property(vtodo,
 384                         icalproperty_new_description(bstr("description")));
 385
 386                 while (prop = icalcomponent_get_first_property(vtodo,
 387                       ICAL_DTSTART_PROPERTY), prop != NULL) {
 388                         icalcomponent_remove_property(vtodo, prop);
 389                 }
 390                 icalcomponent_add_property(vtodo,
 391                         icalproperty_new_dtstart(
 392                                 icaltime_from_webform("dtstart")
 393                         )
 394                 );
 395
 396                 while (prop = icalcomponent_get_first_property(vtodo,
 397                       ICAL_DUE_PROPERTY), prop != NULL) {
 398                         icalcomponent_remove_property(vtodo, prop);
 399                 }
 400                 icalcomponent_add_property(vtodo,
 401                         icalproperty_new_due(
 402                                 icaltime_from_webform("due")
 403                         )
 404                 );
 405
 406                 /* Serialize it and save it to the message base */
 407                 serv_puts("ENT0 1|||4");
 408                 serv_gets(buf);
 409                 if (buf[0] == '4') {
 410                         serv_puts("Content-type: text/calendar");
 411                         serv_puts("");
 412                         serv_puts(icalcomponent_as_ical_string(vtodo));
 413                         serv_puts("000");
 414                         delete_existing = 1;
 415                 }
 416         }
 417
 418         /*
 419          * If the user clicked 'Delete' then delete it, period.
 420          */
 421         if (!strcasecmp(bstr("sc"), "Delete")) {
 422                 delete_existing = 1;
 423         }
 424
 425         if ( (delete_existing) && (msgnum > 0L) ) {
 426                 serv_printf("DELE %ld", atol(bstr("msgnum")));
 427                 serv_gets(buf);
 428         }
 429
 430         if (created_new_vtodo) {
 431                 icalcomponent_free(vtodo);
 432         }
 433
 434         /* Go back to the task list */
 435         readloop("readfwd");
 436 }
 437
 438
 439
 440 /*
 441  * Code common to all display handlers.  Given a message number and a MIME
 442  * type, we load the message and hunt for that MIME type.  If found, we load
 443  * the relevant part, deserialize it into a libical component, filter it for
 444  * the requested object type, and feed it to the specified handler.
 445  */
 446 void display_using_handler(long msgnum,
 447                         char *mimetype,
 448                         icalcomponent_kind which_kind,
 449                         void (*callback)(icalcomponent *, long)
 450         ) {
 451         char buf[SIZ];
 452         char mime_partnum[SIZ];
 453         char mime_filename[SIZ];
 454         char mime_content_type[SIZ];
 455         char mime_disposition[SIZ];
 456         int mime_length;
 457         char relevant_partnum[SIZ];
 458         char *relevant_source = NULL;
 459         icalcomponent *cal, *c;
 460
 461         sprintf(buf, "MSG0 %ld|1", msgnum);     /* ask for headers only */
 462         serv_puts(buf);
 463         serv_gets(buf);
 464         if (buf[0] != '1') return;
 465
 466         while (serv_gets(buf), strcmp(buf, "000")) {
 467                 if (!strncasecmp(buf, "part=", 5)) {
 468                         extract(mime_filename, &buf[5], 1);
 469                         extract(mime_partnum, &buf[5], 2);
 470                         extract(mime_disposition, &buf[5], 3);
 471                         extract(mime_content_type, &buf[5], 4);
 472                         mime_length = extract_int(&buf[5], 5);
 473
 474                         if (!strcasecmp(mime_content_type, "text/calendar")) {
 475                                 strcpy(relevant_partnum, mime_partnum);
 476                         }
 477
 478                 }
 479         }
 480
 481         if (strlen(relevant_partnum) > 0) {
 482                 relevant_source = load_mimepart(msgnum, relevant_partnum);
 483                 if (relevant_source != NULL) {
 484
 485                         cal = icalcomponent_new_from_string(relevant_source);
 486                         if (cal != NULL) {
 487
 488                                 /* Simple components of desired type */
 489                                 if (icalcomponent_isa(cal) == which_kind) {
 490                                         callback(cal, msgnum);
 491                                 }
 492
 493                                 /* Subcomponents of desired type */
 494                                 for (c = icalcomponent_get_first_component(cal,
 495                                     which_kind);
 496                                     (c != 0);
 497                                     c = icalcomponent_get_next_component(cal,
 498                                     which_kind)) {
 499                                         callback(c, msgnum);
 500                                 }
 501                                 icalcomponent_free(cal);
 502                         }
 503                         free(relevant_source);
 504                 }
 505         }
 506
 507 }
 508
 509 void display_calendar(long msgnum) {
 510         display_using_handler(msgnum, "text/calendar",
 511                                 ICAL_VEVENT_COMPONENT,
 512                                 display_individual_cal);
 513 }
 514
 515 void display_task(long msgnum) {
 516         display_using_handler(msgnum, "text/calendar",
 517                                 ICAL_VTODO_COMPONENT,
 518                                 display_individual_task);
 519 }
 520
 521 void display_edit_task(void) {
 522         long msgnum = 0L;
 523
 524         msgnum = atol(bstr("msgnum"));
 525         if (msgnum > 0L) {
 526                 /* existing task */
 527                 display_using_handler(msgnum, "text/calendar",
 528                                 ICAL_VTODO_COMPONENT,
 529                                 display_edit_individual_task);
 530         }
 531         else {
 532                 /* new task */
 533                 display_edit_individual_task(NULL, 0L);
 534         }
 535 }
 536
 537 void save_task(void) {
 538         long msgnum = 0L;
 539
 540         msgnum = atol(bstr("msgnum"));
 541         if (msgnum > 0L) {
 542                 display_using_handler(msgnum, "text/calendar",
 543                                 ICAL_VTODO_COMPONENT,
 544                                 save_individual_task);
 545         }
 546         else {
 547                 save_individual_task(NULL, 0L);
 548         }
 549 }
 550
 551 #endif /* HAVE_ICAL_H */