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
 229 /*
 230  * Display handlers for message reading
 231  */
 232 void display_individual_cal(icalcomponent *cal, long msgnum) {
 233         wprintf("display_individual_cal() called<BR>\n");
 234 }
 235
 236
 237
 238 /*
 239  * Display a task in the task list
 240  */
 241 void display_individual_task(icalcomponent *vtodo, long msgnum) {
 242         icalproperty *p;
 243
 244         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 245         wprintf("<LI><A HREF=\"/display_edit_task?msgnum=%ld\">", msgnum);
 246         if (p != NULL) {
 247                 escputs((char *)icalproperty_get_comment(p));
 248         }
 249         wprintf("</A>\n");
 250 }
 251
 252
 253 /*
 254  * Display a task by itself (for editing)
 255  */
 256 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 257         icalcomponent *vtodo;
 258         icalproperty *p;
 259         struct icaltimetype t;
 260         time_t now;
 261         int created_new_vtodo = 0;
 262
 263         now = time(NULL);
 264
 265         if (supplied_vtodo != NULL) {
 266                 vtodo = supplied_vtodo;
 267         }
 268         else {
 269                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 270                 created_new_vtodo = 1;
 271         }
 272
 273         output_headers(3);
 274         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=007700><TR><TD>"
 275                 "<FONT SIZE=+1 COLOR=\"FFFFFF\""
 276                 "<B>Edit task</B>"
 277                 "</FONT></TD></TR></TABLE><BR>\n"
 278         );
 279
 280         wprintf("<FORM METHOD=\"POST\" ACTION=\"/save_task\">\n");
 281         wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
 282                 msgnum);
 283
 284         wprintf("Summary: "
 285                 "<INPUT TYPE=\"text\" NAME=\"summary\" "
 286                 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
 287         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 288         if (p != NULL) {
 289                 escputs((char *)icalproperty_get_comment(p));
 290         }
 291         wprintf("\"><BR>\n");
 292
 293         wprintf("Start date: ");
 294         p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
 295         if (p != NULL) {
 296                 t = icalproperty_get_dtstart(p);
 297         }
 298         else {
 299                 t = icaltime_from_timet(now, 0);
 300         }
 301         display_icaltimetype_as_webform(&t, "dtstart");
 302         wprintf("<BR>\n");
 303
 304         wprintf("Due date: ");
 305         p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
 306         if (p != NULL) {
 307                 t = icalproperty_get_due(p);
 308         }
 309         else {
 310                 t = icaltime_from_timet(now, 0);
 311         }
 312         display_icaltimetype_as_webform(&t, "due");
 313         wprintf("<BR>\n");
 314
 315         wprintf("<CENTER><TEXTAREA NAME=\"description\" wrap=soft "
 316                 "ROWS=10 COLS=80 WIDTH=80>\n"
 317         );
 318         p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
 319         if (p != NULL) {
 320                 escputs((char *)icalproperty_get_comment(p));
 321         }
 322         wprintf("</TEXTAREA><BR>\n");
 323
 324         wprintf("<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Save\">"
 325                 "&nbsp;&nbsp;"
 326                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Delete\">\n"
 327                 "&nbsp;&nbsp;"
 328                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Cancel\">\n"
 329                 "</CENTER>\n"
 330         );
 331
 332         wprintf("</FORM>\n");
 333
 334         wDumpContent(1);
 335
 336         if (created_new_vtodo) {
 337                 icalcomponent_free(vtodo);
 338         }
 339 }
 340
 341 /*
 342  * Save an edited task
 343  */
 344 void save_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 345         char buf[SIZ];
 346         int delete_existing = 0;
 347         icalproperty *prop;
 348         icalcomponent *vtodo;
 349         int created_new_vtodo = 0;
 350
 351         if (supplied_vtodo != NULL) {
 352                 vtodo = supplied_vtodo;
 353         }
 354         else {
 355                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 356                 created_new_vtodo = 1;
 357         }
 358
 359         if (!strcasecmp(bstr("sc"), "Save")) {
 360
 361                 /* Replace values in the component with ones from the form */
 362
 363                 while (prop = icalcomponent_get_first_property(vtodo,
 364                       ICAL_SUMMARY_PROPERTY), prop != NULL) {
 365                         icalcomponent_remove_property(vtodo, prop);
 366                 }
 367                 icalcomponent_add_property(vtodo,
 368                         icalproperty_new_summary(bstr("summary")));
 369
 370                 while (prop = icalcomponent_get_first_property(vtodo,
 371                       ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
 372                         icalcomponent_remove_property(vtodo, prop);
 373                 }
 374                 icalcomponent_add_property(vtodo,
 375                         icalproperty_new_description(bstr("description")));
 376
 377                 while (prop = icalcomponent_get_first_property(vtodo,
 378                       ICAL_DTSTART_PROPERTY), prop != NULL) {
 379                         icalcomponent_remove_property(vtodo, prop);
 380                 }
 381                 icalcomponent_add_property(vtodo,
 382                         icalproperty_new_dtstart(
 383                                 icaltime_from_webform("dtstart")
 384                         )
 385                 );
 386
 387                 while (prop = icalcomponent_get_first_property(vtodo,
 388                       ICAL_DUE_PROPERTY), prop != NULL) {
 389                         icalcomponent_remove_property(vtodo, prop);
 390                 }
 391                 icalcomponent_add_property(vtodo,
 392                         icalproperty_new_due(
 393                                 icaltime_from_webform("due")
 394                         )
 395                 );
 396
 397                 /* Serialize it and save it to the message base */
 398                 serv_puts("ENT0 1|||4");
 399                 serv_gets(buf);
 400                 if (buf[0] == '4') {
 401                         serv_puts("Content-type: text/calendar");
 402                         serv_puts("");
 403                         serv_puts(icalcomponent_as_ical_string(vtodo));
 404                         serv_puts("000");
 405                         delete_existing = 1;
 406                 }
 407         }
 408
 409         /*
 410          * If the user clicked 'Delete' then delete it, period.
 411          */
 412         if (!strcasecmp(bstr("sc"), "Delete")) {
 413                 delete_existing = 1;
 414         }
 415
 416         if ( (delete_existing) && (msgnum > 0L) ) {
 417                 serv_printf("DELE %ld", atol(bstr("msgnum")));
 418                 serv_gets(buf);
 419         }
 420
 421         if (created_new_vtodo) {
 422                 icalcomponent_free(vtodo);
 423         }
 424
 425         /* Go back to the task list */
 426         readloop("readfwd");
 427 }
 428
 429
 430
 431 /*
 432  * Code common to all display handlers.  Given a message number and a MIME
 433  * type, we load the message and hunt for that MIME type.  If found, we load
 434  * the relevant part, deserialize it into a libical component, filter it for
 435  * the requested object type, and feed it to the specified handler.
 436  */
 437 void display_using_handler(long msgnum,
 438                         char *mimetype,
 439                         icalcomponent_kind which_kind,
 440                         void (*callback)(icalcomponent *, long)
 441         ) {
 442         char buf[SIZ];
 443         char mime_partnum[SIZ];
 444         char mime_filename[SIZ];
 445         char mime_content_type[SIZ];
 446         char mime_disposition[SIZ];
 447         int mime_length;
 448         char relevant_partnum[SIZ];
 449         char *relevant_source = NULL;
 450         icalcomponent *cal, *c;
 451
 452         sprintf(buf, "MSG0 %ld|1", msgnum);     /* ask for headers only */
 453         serv_puts(buf);
 454         serv_gets(buf);
 455         if (buf[0] != '1') return;
 456
 457         while (serv_gets(buf), strcmp(buf, "000")) {
 458                 if (!strncasecmp(buf, "part=", 5)) {
 459                         extract(mime_filename, &buf[5], 1);
 460                         extract(mime_partnum, &buf[5], 2);
 461                         extract(mime_disposition, &buf[5], 3);
 462                         extract(mime_content_type, &buf[5], 4);
 463                         mime_length = extract_int(&buf[5], 5);
 464
 465                         if (!strcasecmp(mime_content_type, "text/calendar")) {
 466                                 strcpy(relevant_partnum, mime_partnum);
 467                         }
 468
 469                 }
 470         }
 471
 472         if (strlen(relevant_partnum) > 0) {
 473                 relevant_source = load_mimepart(msgnum, relevant_partnum);
 474                 if (relevant_source != NULL) {
 475
 476                         cal = icalcomponent_new_from_string(relevant_source);
 477                         if (cal != NULL) {
 478
 479                                 /* Simple components of desired type */
 480                                 if (icalcomponent_isa(cal) == which_kind) {
 481                                         callback(cal, msgnum);
 482                                 }
 483
 484                                 /* Subcomponents of desired type */
 485                                 for (c = icalcomponent_get_first_component(cal,
 486                                     which_kind);
 487                                     (c != 0);
 488                                     c = icalcomponent_get_next_component(cal,
 489                                     which_kind)) {
 490                                         callback(c, msgnum);
 491                                 }
 492                                 icalcomponent_free(cal);
 493                         }
 494                         free(relevant_source);
 495                 }
 496         }
 497
 498 }
 499
 500 void display_calendar(long msgnum) {
 501         display_using_handler(msgnum, "text/calendar",
 502                                 ICAL_ANY_COMPONENT,
 503                                 display_individual_cal);
 504 }
 505
 506 void display_task(long msgnum) {
 507         display_using_handler(msgnum, "text/calendar",
 508                                 ICAL_VTODO_COMPONENT,
 509                                 display_individual_task);
 510 }
 511
 512 void display_edit_task(void) {
 513         long msgnum = 0L;
 514
 515         msgnum = atol(bstr("msgnum"));
 516         if (msgnum > 0L) {
 517                 /* existing task */
 518                 display_using_handler(msgnum, "text/calendar",
 519                                 ICAL_VTODO_COMPONENT,
 520                                 display_edit_individual_task);
 521         }
 522         else {
 523                 /* new task */
 524                 display_edit_individual_task(NULL, 0L);
 525         }
 526 }
 527
 528 void save_task(void) {
 529         long msgnum = 0L;
 530
 531         msgnum = atol(bstr("msgnum"));
 532         if (msgnum > 0L) {
 533                 display_using_handler(msgnum, "text/calendar",
 534                                 ICAL_VTODO_COMPONENT,
 535                                 save_individual_task);
 536         }
 537         else {
 538                 save_individual_task(NULL, 0L);
 539         }
 540 }
 541
 542 #endif /* HAVE_ICAL_H */