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