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