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         icalcomponent *c;
  76
  77         /* Iterate through all subcomponents */
  78         wprintf("Iterating through all sub-components<BR>\n");
  79         for (c = icalcomponent_get_first_component(cal, ICAL_ANY_COMPONENT);
  80             (c != 0);
  81             c = icalcomponent_get_next_component(cal, ICAL_ANY_COMPONENT)) {
  82                 /* Recursively process subcomponent */
  83                 cal_process_object(c);
  84         }
  85
  86 }
  87
  88
  89 /*
  90  * Deserialize a calendar object in a message so it can be processed.
  91  * (This is the main entry point for these things)
  92  */
  93 void cal_process_attachment(char *part_source) {
  94         icalcomponent *cal;
  95
  96         wprintf("Processing calendar attachment<BR>\n");
  97         cal = icalcomponent_new_from_string(part_source);
  98
  99         if (cal == NULL) {
 100                 wprintf("Error parsing calendar object: %s<BR>\n",
 101                         icalerror_strerror(icalerrno));
 102                 return;
 103         }
 104
 105         cal_process_object(cal);
 106
 107         /* Free the memory we obtained from libical's constructor */
 108         icalcomponent_free(cal);
 109 }
 110
 111 /*****************************************************************************/
 112
 113
 114
 115 /*
 116  * Display handlers for message reading
 117  */
 118
 119
 120
 121 /*
 122  * If we're reading calendar items, just store them for now.  We have to
 123  * sort and re-output them later when we draw the calendar.
 124  */
 125 void display_individual_cal(icalcomponent *cal, long msgnum) {
 126
 127         WC->num_cal += 1;
 128
 129         WC->disp_cal = realloc(WC->disp_cal,
 130                         (sizeof(icalcomponent *) * WC->num_cal) );
 131         WC->disp_cal[WC->num_cal - 1] = icalcomponent_new_clone(cal);
 132
 133         WC->cal_msgnum = realloc(WC->cal_msgnum,
 134                         (sizeof(long) * WC->num_cal) );
 135         WC->cal_msgnum[WC->num_cal - 1] = msgnum;
 136 }
 137
 138
 139
 140 /*
 141  * Display a task in the task list
 142  */
 143 void display_individual_task(icalcomponent *vtodo, long msgnum) {
 144         icalproperty *p;
 145
 146         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 147         wprintf("<LI><A HREF=\"/display_edit_task?msgnum=%ld\">", msgnum);
 148         if (p != NULL) {
 149                 escputs((char *)icalproperty_get_comment(p));
 150         }
 151         wprintf("</A>\n");
 152 }
 153
 154
 155 /*
 156  * Display a task by itself (for editing)
 157  */
 158 void display_edit_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 159         icalcomponent *vtodo;
 160         icalproperty *p;
 161         struct icaltimetype t;
 162         time_t now;
 163         int created_new_vtodo = 0;
 164
 165         now = time(NULL);
 166
 167         if (supplied_vtodo != NULL) {
 168                 vtodo = supplied_vtodo;
 169         }
 170         else {
 171                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 172                 created_new_vtodo = 1;
 173         }
 174
 175         output_headers(3);
 176         wprintf("<TABLE WIDTH=100%% BORDER=0 BGCOLOR=007700><TR><TD>"
 177                 "<FONT SIZE=+1 COLOR=\"FFFFFF\""
 178                 "<B>Edit task</B>"
 179                 "</FONT></TD></TR></TABLE><BR>\n"
 180         );
 181
 182         wprintf("<FORM METHOD=\"POST\" ACTION=\"/save_task\">\n");
 183         wprintf("<INPUT TYPE=\"hidden\" NAME=\"msgnum\" VALUE=\"%ld\">\n",
 184                 msgnum);
 185
 186         wprintf("Summary: "
 187                 "<INPUT TYPE=\"text\" NAME=\"summary\" "
 188                 "MAXLENGTH=\"64\" SIZE=\"64\" VALUE=\"");
 189         p = icalcomponent_get_first_property(vtodo, ICAL_SUMMARY_PROPERTY);
 190         if (p != NULL) {
 191                 escputs((char *)icalproperty_get_comment(p));
 192         }
 193         wprintf("\"><BR>\n");
 194
 195         wprintf("Start date: ");
 196         p = icalcomponent_get_first_property(vtodo, ICAL_DTSTART_PROPERTY);
 197         if (p != NULL) {
 198                 t = icalproperty_get_dtstart(p);
 199         }
 200         else {
 201                 t = icaltime_from_timet(now, 0);
 202         }
 203         display_icaltimetype_as_webform(&t, "dtstart");
 204         wprintf("<BR>\n");
 205
 206         wprintf("Due date: ");
 207         p = icalcomponent_get_first_property(vtodo, ICAL_DUE_PROPERTY);
 208         if (p != NULL) {
 209                 t = icalproperty_get_due(p);
 210         }
 211         else {
 212                 t = icaltime_from_timet(now, 0);
 213         }
 214         display_icaltimetype_as_webform(&t, "due");
 215         wprintf("<BR>\n");
 216
 217         wprintf("<CENTER><TEXTAREA NAME=\"description\" wrap=soft "
 218                 "ROWS=10 COLS=80 WIDTH=80>\n"
 219         );
 220         p = icalcomponent_get_first_property(vtodo, ICAL_DESCRIPTION_PROPERTY);
 221         if (p != NULL) {
 222                 escputs((char *)icalproperty_get_comment(p));
 223         }
 224         wprintf("</TEXTAREA><BR>\n");
 225
 226         wprintf("<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Save\">"
 227                 "&nbsp;&nbsp;"
 228                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Delete\">\n"
 229                 "&nbsp;&nbsp;"
 230                 "<INPUT TYPE=\"submit\" NAME=\"sc\" VALUE=\"Cancel\">\n"
 231                 "</CENTER>\n"
 232         );
 233
 234         wprintf("</FORM>\n");
 235
 236         wDumpContent(1);
 237
 238         if (created_new_vtodo) {
 239                 icalcomponent_free(vtodo);
 240         }
 241 }
 242
 243 /*
 244  * Save an edited task
 245  */
 246 void save_individual_task(icalcomponent *supplied_vtodo, long msgnum) {
 247         char buf[SIZ];
 248         int delete_existing = 0;
 249         icalproperty *prop;
 250         icalcomponent *vtodo;
 251         int created_new_vtodo = 0;
 252
 253         if (supplied_vtodo != NULL) {
 254                 vtodo = supplied_vtodo;
 255         }
 256         else {
 257                 vtodo = icalcomponent_new(ICAL_VTODO_COMPONENT);
 258                 created_new_vtodo = 1;
 259         }
 260
 261         if (!strcasecmp(bstr("sc"), "Save")) {
 262
 263                 /* Replace values in the component with ones from the form */
 264
 265                 while (prop = icalcomponent_get_first_property(vtodo,
 266                       ICAL_SUMMARY_PROPERTY), prop != NULL) {
 267                         icalcomponent_remove_property(vtodo, prop);
 268                 }
 269                 icalcomponent_add_property(vtodo,
 270                         icalproperty_new_summary(bstr("summary")));
 271
 272                 while (prop = icalcomponent_get_first_property(vtodo,
 273                       ICAL_DESCRIPTION_PROPERTY), prop != NULL) {
 274                         icalcomponent_remove_property(vtodo, prop);
 275                 }
 276                 icalcomponent_add_property(vtodo,
 277                         icalproperty_new_description(bstr("description")));
 278
 279                 while (prop = icalcomponent_get_first_property(vtodo,
 280                       ICAL_DTSTART_PROPERTY), prop != NULL) {
 281                         icalcomponent_remove_property(vtodo, prop);
 282                 }
 283                 icalcomponent_add_property(vtodo,
 284                         icalproperty_new_dtstart(
 285                                 icaltime_from_webform("dtstart")
 286                         )
 287                 );
 288
 289                 while (prop = icalcomponent_get_first_property(vtodo,
 290                       ICAL_DUE_PROPERTY), prop != NULL) {
 291                         icalcomponent_remove_property(vtodo, prop);
 292                 }
 293                 icalcomponent_add_property(vtodo,
 294                         icalproperty_new_due(
 295                                 icaltime_from_webform("due")
 296                         )
 297                 );
 298
 299                 /* Serialize it and save it to the message base */
 300                 serv_puts("ENT0 1|||4");
 301                 serv_gets(buf);
 302                 if (buf[0] == '4') {
 303                         serv_puts("Content-type: text/calendar");
 304                         serv_puts("");
 305                         serv_puts(icalcomponent_as_ical_string(vtodo));
 306                         serv_puts("000");
 307                         delete_existing = 1;
 308                 }
 309         }
 310
 311         /*
 312          * If the user clicked 'Delete' then delete it, period.
 313          */
 314         if (!strcasecmp(bstr("sc"), "Delete")) {
 315                 delete_existing = 1;
 316         }
 317
 318         if ( (delete_existing) && (msgnum > 0L) ) {
 319                 serv_printf("DELE %ld", atol(bstr("msgnum")));
 320                 serv_gets(buf);
 321         }
 322
 323         if (created_new_vtodo) {
 324                 icalcomponent_free(vtodo);
 325         }
 326
 327         /* Go back to the task list */
 328         readloop("readfwd");
 329 }
 330
 331
 332
 333 /*
 334  * Code common to all display handlers.  Given a message number and a MIME
 335  * type, we load the message and hunt for that MIME type.  If found, we load
 336  * the relevant part, deserialize it into a libical component, filter it for
 337  * the requested object type, and feed it to the specified handler.
 338  */
 339 void display_using_handler(long msgnum,
 340                         char *mimetype,
 341                         icalcomponent_kind which_kind,
 342                         void (*callback)(icalcomponent *, long)
 343         ) {
 344         char buf[SIZ];
 345         char mime_partnum[SIZ];
 346         char mime_filename[SIZ];
 347         char mime_content_type[SIZ];
 348         char mime_disposition[SIZ];
 349         int mime_length;
 350         char relevant_partnum[SIZ];
 351         char *relevant_source = NULL;
 352         icalcomponent *cal, *c;
 353
 354         sprintf(buf, "MSG0 %ld|1", msgnum);     /* ask for headers only */
 355         serv_puts(buf);
 356         serv_gets(buf);
 357         if (buf[0] != '1') return;
 358
 359         while (serv_gets(buf), strcmp(buf, "000")) {
 360                 if (!strncasecmp(buf, "part=", 5)) {
 361                         extract(mime_filename, &buf[5], 1);
 362                         extract(mime_partnum, &buf[5], 2);
 363                         extract(mime_disposition, &buf[5], 3);
 364                         extract(mime_content_type, &buf[5], 4);
 365                         mime_length = extract_int(&buf[5], 5);
 366
 367                         if (!strcasecmp(mime_content_type, "text/calendar")) {
 368                                 strcpy(relevant_partnum, mime_partnum);
 369                         }
 370
 371                 }
 372         }
 373
 374         if (strlen(relevant_partnum) > 0) {
 375                 relevant_source = load_mimepart(msgnum, relevant_partnum);
 376                 if (relevant_source != NULL) {
 377
 378                         cal = icalcomponent_new_from_string(relevant_source);
 379                         if (cal != NULL) {
 380
 381                                 /* Simple components of desired type */
 382                                 if (icalcomponent_isa(cal) == which_kind) {
 383                                         callback(cal, msgnum);
 384                                 }
 385
 386                                 /* Subcomponents of desired type */
 387                                 for (c = icalcomponent_get_first_component(cal,
 388                                     which_kind);
 389                                     (c != 0);
 390                                     c = icalcomponent_get_next_component(cal,
 391                                     which_kind)) {
 392                                         callback(c, msgnum);
 393                                 }
 394                                 icalcomponent_free(cal);
 395                         }
 396                         free(relevant_source);
 397                 }
 398         }
 399
 400 }
 401
 402 void display_calendar(long msgnum) {
 403         display_using_handler(msgnum, "text/calendar",
 404                                 ICAL_VEVENT_COMPONENT,
 405                                 display_individual_cal);
 406 }
 407
 408 void display_task(long msgnum) {
 409         display_using_handler(msgnum, "text/calendar",
 410                                 ICAL_VTODO_COMPONENT,
 411                                 display_individual_task);
 412 }
 413
 414 void display_edit_task(void) {
 415         long msgnum = 0L;
 416
 417         msgnum = atol(bstr("msgnum"));
 418         if (msgnum > 0L) {
 419                 /* existing task */
 420                 display_using_handler(msgnum, "text/calendar",
 421                                 ICAL_VTODO_COMPONENT,
 422                                 display_edit_individual_task);
 423         }
 424         else {
 425                 /* new task */
 426                 display_edit_individual_task(NULL, 0L);
 427         }
 428 }
 429
 430 void save_task(void) {
 431         long msgnum = 0L;
 432
 433         msgnum = atol(bstr("msgnum"));
 434         if (msgnum > 0L) {
 435                 display_using_handler(msgnum, "text/calendar",
 436                                 ICAL_VTODO_COMPONENT,
 437                                 save_individual_task);
 438         }
 439         else {
 440                 save_individual_task(NULL, 0L);
 441         }
 442 }
 443
 444 void display_edit_event(void) {
 445         long msgnum = 0L;
 446
 447         msgnum = atol(bstr("msgnum"));
 448         if (msgnum > 0L) {
 449                 /* existing event */
 450                 display_using_handler(msgnum, "text/calendar",
 451                                 ICAL_VEVENT_COMPONENT,
 452                                 display_edit_individual_event);
 453         }
 454         else {
 455                 /* new event */
 456                 display_edit_individual_event(NULL, 0L);
 457         }
 458 }
 459
 460 void save_event(void) {
 461         long msgnum = 0L;
 462
 463         msgnum = atol(bstr("msgnum"));
 464
 465         if (msgnum > 0L) {
 466                 display_using_handler(msgnum, "text/calendar",
 467                                 ICAL_VEVENT_COMPONENT,
 468                                 save_individual_event);
 469         }
 470         else {
 471                 save_individual_event(NULL, 0L);
 472         }
 473 }
 474
 475 #endif /* HAVE_ICAL_H */