webcit/calendar_view.c

   1 /*
   2  * $Id$
   3  *
   4  *
   5  */
   6
   7 #include <ctype.h>
   8 #include <stdlib.h>
   9 #include <unistd.h>
  10 #include <stdio.h>
  11 #include <fcntl.h>
  12 #include <signal.h>
  13 #include <sys/types.h>
  14 #include <sys/wait.h>
  15 #include <sys/socket.h>
  16 #include <limits.h>
  17 #include <netinet/in.h>
  18 #include <netdb.h>
  19 #include <string.h>
  20 #include <pwd.h>
  21 #include <errno.h>
  22 #include <stdarg.h>
  23 #include <pthread.h>
  24 #include <signal.h>
  25 #include <time.h>
  26 #include "webcit.h"
  27 #include "webserver.h"
  28
  29 #ifndef WEBCIT_WITH_CALENDAR_SERVICE
  30
  31 void do_calendar_view(void) {   /* stub for non-libical builds */
  32         wprintf("<CENTER><I>Calendar view not available</I></CENTER><BR>\n");
  33 }
  34
  35 #else   /* WEBCIT_WITH_CALENDAR_SERVICE */
  36
  37 /****************************************************************************/
  38
  39
  40 void calendar_month_view_display_events(time_t thetime) {
  41         int i;
  42         time_t event_tt;
  43         struct tm event_tm;
  44         struct tm today_tm;
  45         icalproperty *p;
  46         struct icaltimetype t;
  47         int month, day, year;
  48         int all_day_event = 0;
  49
  50         if (WC->num_cal == 0) {
  51                 wprintf("<BR><BR><BR>\n");
  52                 return;
  53         }
  54
  55         memcpy(&today_tm, localtime(&thetime), sizeof(struct tm));
  56         month = today_tm.tm_mon + 1;
  57         day = today_tm.tm_mday;
  58         year = today_tm.tm_year + 1900;
  59
  60         for (i=0; i<(WC->num_cal); ++i) {
  61                 p = icalcomponent_get_first_property(WC->disp_cal[i],
  62                                                 ICAL_DTSTART_PROPERTY);
  63                 if (p != NULL) {
  64                         t = icalproperty_get_dtstart(p);
  65                         event_tt = icaltime_as_timet(t);
  66                         memcpy(&event_tm, localtime(&event_tt), sizeof(struct tm));
  67                         if ((event_tm.tm_year == today_tm.tm_year)
  68                            && (event_tm.tm_mon == today_tm.tm_mon)
  69                            && (event_tm.tm_mday == today_tm.tm_mday)) {
  70
  71                                 if (t.is_date) all_day_event = 1;
  72                                 else all_day_event = 0;
  73
  74                                 p = icalcomponent_get_first_property(
  75                                                         WC->disp_cal[i],
  76                                                         ICAL_SUMMARY_PROPERTY);
  77                                 if (p != NULL) {
  78
  79                                         if (all_day_event) {
  80                                                 wprintf("<TABLE border=0 cellpadding=2><TR>"
  81                                                         "<TD BGCOLOR=\"#CCCCDD\">"
  82                                                 );
  83                                         }
  84
  85                                         wprintf("<FONT SIZE=-1>"
  86                                                 "<A HREF=\"/display_edit_event?msgnum=%ld&calview=%s&year=%s&month=%s&day=%s\">",
  87                                                 WC->cal_msgnum[i],
  88                                                 bstr("calview"),
  89                                                 bstr("year"),
  90                                                 bstr("month"),
  91                                                 bstr("day")
  92                                         );
  93                                         escputs((char *)
  94                                                 icalproperty_get_comment(p));
  95                                         wprintf("</A></FONT><BR>\n");
  96
  97                                         if (all_day_event) {
  98                                                 wprintf("</TD></TR></TABLE>");
  99                                         }
 100
 101                                 }
 102
 103                         }
 104
 105
 106                 }
 107         }
 108 }
 109
 110
 111
 112 void calendar_month_view(int year, int month, int day) {
 113         struct tm starting_tm;
 114         struct tm tm;
 115         time_t thetime;
 116         int i;
 117         time_t previous_month;
 118         time_t next_month;
 119
 120         /* Determine what day to start.
 121          * First, back up to the 1st of the month...
 122          */
 123         memset(&starting_tm, 0, sizeof(struct tm));
 124         starting_tm.tm_year = year - 1900;
 125         starting_tm.tm_mon = month - 1;
 126         starting_tm.tm_mday = day;
 127         thetime = mktime(&starting_tm);
 128
 129         memcpy(&tm, &starting_tm, sizeof(struct tm));
 130         while (tm.tm_mday != 1) {
 131                 thetime = thetime - (time_t)86400;      /* go back 24 hours */
 132                 memcpy(&tm, localtime(&thetime), sizeof(struct tm));
 133         }
 134
 135         /* Determine previous and next months ... for links */
 136         previous_month = thetime - (time_t)864000L;     /* back 10 days */
 137         next_month = thetime + (time_t)(31L * 86400L);  /* ahead 31 days */
 138
 139         /* Now back up until we're on a Sunday */
 140         memcpy(&tm, localtime(&thetime), sizeof(struct tm));
 141         while (tm.tm_wday != 0) {
 142                 thetime = thetime - (time_t)86400;      /* go back 24 hours */
 143                 memcpy(&tm, localtime(&thetime), sizeof(struct tm));
 144         }
 145
 146         /* Outer table (to get the background color) */
 147         wprintf("<TABLE width=100%% border=0 cellpadding=0 cellspacing=0 "
 148                 "bgcolor=#4444FF><TR><TD>\n");
 149
 150         wprintf("<TABLE width=100%% border=0 cellpadding=0 cellspacing=0>"
 151                 "<TR><TD align=left><font color=#FFFFFF>"
 152                 "&nbsp;<A HREF=\"/display_edit_event?msgnum=0"
 153                 "&year=%d&month=%d&day=%d\">"
 154                 "Add new calendar event</A>"
 155                 "</font></TD>\n",
 156                 year, month, day
 157         );
 158
 159         wprintf("<TD><CENTER><H3>");
 160
 161         memcpy(&tm, localtime(&previous_month), sizeof(struct tm));
 162         wprintf("<A HREF=\"readfwd?calview=month&year=%d&month=%d&day=1\">",
 163                 (int)(tm.tm_year)+1900, tm.tm_mon + 1);
 164         wprintf("<IMG ALIGN=MIDDLE SRC=\"/static/back.gif\" BORDER=0></A>\n");
 165
 166         wprintf("&nbsp;&nbsp;"
 167                 "<FONT COLOR=\"#FFFFFF\">"
 168                 "%s %d"
 169                 "</FONT>"
 170                 "&nbsp;&nbsp;", months[month-1], year);
 171
 172         memcpy(&tm, localtime(&next_month), sizeof(struct tm));
 173         wprintf("<A HREF=\"readfwd?calview=month&year=%d&month=%d&day=1\">",
 174                 (int)(tm.tm_year)+1900, tm.tm_mon + 1);
 175         wprintf("<IMG ALIGN=MIDDLE SRC=\"/static/forward.gif\" BORDER=0></A>\n");
 176
 177         wprintf("</H3></TD><TD align=right><font color=#FFFFFF size=-2>"
 178                 "Click on any date for day view&nbsp;"
 179                 "</FONT></TD></TR></TABLE>\n");
 180
 181         /* Inner table (the real one) */
 182         wprintf("<TABLE width=100%% border=0 cellpadding=1 cellspacing=1 "
 183                 "bgcolor=#4444FF>");
 184         for (i=0; i<7; ++i) {
 185                 wprintf("<TH><FONT COLOR=\"#FFFFFF\">%s</FONT></TH>", days[i]);
 186         }
 187
 188         /* Now do 35 days */
 189         for (i = 0; i < 35; ++i) {
 190                 memcpy(&tm, localtime(&thetime), sizeof(struct tm));
 191
 192                 /* Before displaying Sunday, start a new row */
 193                 if ((i % 7) == 0) {
 194                         wprintf("<TR>");
 195                 }
 196
 197                 wprintf("<TD BGCOLOR=\"#%s\" WIDTH=14%% HEIGHT=60 VALIGN=TOP><B>",
 198                         ((tm.tm_mon != month-1) ? "DDDDDD" :
 199                         ((tm.tm_wday==0 || tm.tm_wday==6) ? "EEEECC" :
 200                         "FFFFFF"))
 201                 );
 202                 if ((i==0) || (tm.tm_mday == 1)) {
 203                         wprintf("%s ", months[tm.tm_mon]);
 204                 }
 205                 wprintf("<A HREF=\"readfwd?calview=day&year=%d&month=%d&day=%d\">"
 206                         "%d</A></B><BR>",
 207                         tm.tm_year + 1900,
 208                         tm.tm_mon + 1,
 209                         tm.tm_mday,
 210                         tm.tm_mday);
 211
 212                 /* put the data here, stupid */
 213                 calendar_month_view_display_events(thetime);
 214
 215                 wprintf("</TD>");
 216
 217                 /* After displaying Saturday, end the row */
 218                 if ((i % 7) == 6) {
 219                         wprintf("</TR>\n");
 220                 }
 221
 222                 thetime += (time_t)86400;               /* ahead 24 hours */
 223         }
 224
 225         wprintf("</TABLE>"                      /* end of inner table */
 226                 "</TD></TR></TABLE>"            /* end of outer table */
 227                 "</CENTER>\n");
 228 }
 229
 230
 231 void calendar_week_view(int year, int month, int day) {
 232         wprintf("<CENTER><I>week view FIXME</I></CENTER><BR>\n");
 233 }
 234
 235
 236 /*
 237  * Display events for a particular hour of a particular day.
 238  * (Specify hour < 0 to show "all day" events)
 239  */
 240 void calendar_day_view_display_events(int year, int month,
 241                                         int day, int hour) {
 242         int i;
 243         icalproperty *p;
 244         struct icaltimetype t;
 245         time_t event_tt;
 246         struct tm *event_tm;
 247         int all_day_event = 0;
 248
 249         if (WC->num_cal == 0) {
 250                 wprintf("<BR><BR><BR>\n");
 251                 return;
 252         }
 253
 254         for (i=0; i<(WC->num_cal); ++i) {
 255                 p = icalcomponent_get_first_property(WC->disp_cal[i],
 256                                                 ICAL_DTSTART_PROPERTY);
 257                 if (p != NULL) {
 258                         t = icalproperty_get_dtstart(p);
 259                         event_tt = icaltime_as_timet(t);
 260                         event_tm = localtime(&event_tt);
 261                         if ((event_tm->tm_year == (year-1900))
 262                            && (event_tm->tm_mon == (month-1))
 263                            && (event_tm->tm_mday == day)
 264                            && ( ((event_tm->tm_hour == hour)&&(!t.is_date)) || ((hour<0)&&(t.is_date)) )
 265                            ) {
 266
 267                                 if (t.is_date) all_day_event = 1;
 268
 269                                 p = icalcomponent_get_first_property(
 270                                                         WC->disp_cal[i],
 271                                                         ICAL_SUMMARY_PROPERTY);
 272                                 if (p != NULL) {
 273
 274                                         if (all_day_event) {
 275                                                 wprintf("<TABLE border=1 cellpadding=2><TR>"
 276                                                         "<TD BGCOLOR=\"#CCCCCC\">"
 277                                                 );
 278                                         }
 279
 280                                         wprintf("<FONT SIZE=-1>"
 281                                                 "<A HREF=\"/display_edit_event?msgnum=%ld&calview=day&year=%d&month=%d&day=%d\">",
 282                                                 WC->cal_msgnum[i],
 283                                                 year, month, day
 284                                         );
 285                                         escputs((char *)
 286                                                 icalproperty_get_comment(p));
 287                                         wprintf("</A></FONT><BR>\n");
 288
 289                                         if (all_day_event) {
 290                                                 wprintf("</TD></TR></TABLE>");
 291                                         }
 292                                 }
 293
 294                         }
 295
 296
 297                 }
 298         }
 299 }
 300
 301
 302
 303 void calendar_day_view(int year, int month, int day) {
 304         int hour;
 305         struct icaltimetype today, yesterday, tomorrow;
 306
 307
 308         /* Figure out the dates for "yesterday" and "tomorrow" links */
 309
 310         memset(&today, 0, sizeof(struct icaltimetype));
 311         today.year = year;
 312         today.month = month;
 313         today.day = day;
 314         today.is_date = 1;
 315
 316         memcpy(&yesterday, &today, sizeof(struct icaltimetype));
 317         --yesterday.day;
 318         yesterday = icaltime_normalize(yesterday);
 319
 320         memcpy(&tomorrow, &today, sizeof(struct icaltimetype));
 321         ++tomorrow.day;
 322         tomorrow = icaltime_normalize(tomorrow);
 323
 324
 325         /* Outer table (to get the background color) */
 326         wprintf("<TABLE width=100%% border=0 cellpadding=0 cellspacing=0 "
 327                 "bgcolor=#4444FF><TR><TD>\n");
 328
 329         /* Inner table (the real one) */
 330         wprintf("<TABLE width=100%% border=0 cellpadding=1 cellspacing=1 "
 331                 "bgcolor=#4444FF><TR>\n");
 332
 333         /* Innermost table (contains hours etc.) */
 334         wprintf("<TD WIDTH=80%%>"
 335                 "<TABLE width=100%% border=0 cellpadding=1 cellspacing=1 "
 336                 "bgcolor=#4444FF>\n");
 337
 338         /* Display events before 8:00 (hour=-1 is all-day events) */
 339         wprintf("<TR>"
 340                 "<TD BGCOLOR=\"#CCCCDD\" VALIGN=MIDDLE WIDTH=10%%></TD>"
 341                 "<TD BGCOLOR=\"#FFFFFF\" VALIGN=TOP>");
 342         for (hour = (-1); hour <= 7; ++hour) {
 343                 calendar_day_view_display_events(year, month, day, hour);
 344         }
 345         wprintf("</TD></TR>\n");
 346
 347         /* Now the middle of the day... */
 348         for (hour = 8; hour <= 17; ++hour) {    /* could do HEIGHT=xx */
 349                 wprintf("<TR HEIGHT=30><TD BGCOLOR=\"#CCCCDD\" ALIGN=MIDDLE "
 350                         "VALIGN=MIDDLE WIDTH=10%%>");
 351                 wprintf("<A HREF=\"/display_edit_event?msgnum=0"
 352                         "&year=%d&month=%d&day=%d&hour=%d&minute=0\">",
 353                         year, month, day, hour
 354                 );
 355                 wprintf("%d:00%s</A> ",
 356                         (hour <= 12 ? hour : hour-12),
 357                         (hour < 12 ? "am" : "pm")
 358                 );
 359                 wprintf("</TD><TD BGCOLOR=\"#FFFFFF\" VALIGN=TOP>");
 360
 361                 /* put the data here, stupid */
 362                 calendar_day_view_display_events(year, month, day, hour);
 363
 364                 wprintf("</TD></TR>\n");
 365         }
 366
 367         /* Display events after 5:00... */
 368         wprintf("<TR>"
 369                 "<TD BGCOLOR=\"#CCCCDD\" VALIGN=MIDDLE WIDTH=10%%></TD>"
 370                 "<TD BGCOLOR=\"#FFFFFF\" VALIGN=TOP>");
 371         for (hour = 18; hour <= 23; ++hour) {
 372                 calendar_day_view_display_events(year, month, day, hour);
 373         }
 374         wprintf("</TD></TR>\n");
 375
 376
 377         wprintf("</TABLE>"                      /* end of innermost table */
 378                 "</TD>"
 379         );
 380
 381         wprintf("<TD WIDTH=20%% VALIGN=top>");  /* begin stuff-on-the-right */
 382
 383
 384         /* Begin todays-date-with-left-and-right-arrows */
 385         wprintf("<CENTER><TABLE BORDER=0 CELLSPACING=0 CELLPADDING=1><TR>\n");
 386
 387         wprintf("<TD>"
 388                 "<A HREF=\"readfwd?calview=day&year=%d&month=%d&day=%d\">",
 389                 yesterday.year, yesterday.month, yesterday.day
 390         );
 391         wprintf("<IMG ALIGN=MIDDLE SRC=\"/static/back.gif\" BORDER=0></A>"
 392                 "</TD>\n");
 393
 394         wprintf("<TD ALIGN=MIDDLE><FONT COLOR=\"#FFFFFF\">"
 395                 "<H2>%s</H2><H1>%d</H1><H3>%d</H3>"
 396                 "</FONT></TD>",
 397                 months[month-1], day, year);
 398
 399         wprintf("<TD>"
 400                 "<A HREF=\"readfwd?calview=day&year=%d&month=%d&day=%d\">",
 401                 tomorrow.year, tomorrow.month, tomorrow.day
 402         );
 403         wprintf("<IMG ALIGN=MIDDLE SRC=\"/static/forward.gif\""
 404                 " BORDER=0></A></TD>\n");
 405
 406         wprintf("</TR></TABLE></CENTER>\n");
 407         /* End todays-date-with-left-and-right-arrows */
 408
 409         wprintf("<CENTER><font color=#FFFFFF>"
 410                 "&nbsp;<A HREF=\"/display_edit_event?msgnum=0"
 411                 "&year=%d&month=%d&day=%d\">"
 412                 "Add new calendar event</A>"
 413                 "<BR><BR>\n",
 414                 year, month, day
 415         );
 416
 417         wprintf("<A HREF=\"readfwd?calview=month&year=%d&month=%d&day=1\">"
 418                 "Back to month view</A>\n", year, month);
 419
 420         wprintf("</FONT></CENTER>\n");
 421
 422         wprintf("</TD>");                       /* end stuff-on-the-right */
 423
 424
 425
 426         wprintf("</TR></TABLE>"                 /* end of inner table */
 427                 "</TD></TR></TABLE>"            /* end of outer table */
 428         );
 429
 430
 431
 432 }
 433
 434 /*
 435  * Display today's events.
 436  */
 437 void calendar_summary_view(void) {
 438         int i;
 439         icalproperty *p;
 440         struct icaltimetype t;
 441         time_t event_tt;
 442         struct tm event_tm;
 443         struct tm today_tm;
 444         time_t now;
 445         int all_day_event = 0;
 446         char timestring[SIZ];
 447
 448         if (WC->num_cal == 0) {
 449                 return;
 450         }
 451
 452         now = time(NULL);
 453         memcpy(&today_tm, localtime(&now), sizeof(struct tm));
 454
 455         wprintf("<UL>");
 456
 457         for (i=0; i<(WC->num_cal); ++i) {
 458                 p = icalcomponent_get_first_property(WC->disp_cal[i],
 459                                                 ICAL_DTSTART_PROPERTY);
 460                 if (p != NULL) {
 461                         t = icalproperty_get_dtstart(p);
 462                         event_tt = icaltime_as_timet(t);
 463                         fmt_time(timestring, event_tt);
 464                         memcpy(&event_tm, localtime(&event_tt), sizeof(struct tm));
 465                         if ( (event_tm.tm_year == today_tm.tm_year)
 466                            && (event_tm.tm_mon == today_tm.tm_mon)
 467                            && (event_tm.tm_mday == today_tm.tm_mday)
 468                            ) {
 469
 470                                 if (t.is_date) all_day_event = 1;
 471
 472                                 p = icalcomponent_get_first_property(
 473                                                         WC->disp_cal[i],
 474                                                         ICAL_SUMMARY_PROPERTY);
 475                                 if (p != NULL) {
 476                                         wprintf("<LI>");
 477                                         escputs((char *)
 478                                                 icalproperty_get_comment(p));
 479                                         wprintf(" (%s)\n", timestring);
 480                                 }
 481                         }
 482                 }
 483         }
 484         wprintf("</UL>\n");
 485         free_calendar_buffer();
 486 }
 487
 488
 489
 490 void free_calendar_buffer(void) {
 491         int i;
 492         if (WC->num_cal) for (i=0; i<(WC->num_cal); ++i) {
 493                 icalcomponent_free(WC->disp_cal[i]);
 494         }
 495         WC->num_cal = 0;
 496         free(WC->disp_cal);
 497         WC->disp_cal = NULL;
 498         free(WC->cal_msgnum);
 499         WC->cal_msgnum = NULL;
 500 }
 501
 502
 503
 504
 505 void do_calendar_view(void) {
 506         time_t now;
 507         struct tm tm;
 508         int year, month, day;
 509         char calview[SIZ];
 510
 511         /* In case no date was specified, go with today */
 512         now = time(NULL);
 513         memcpy(&tm, localtime(&now), sizeof(struct tm));
 514         year = tm.tm_year + 1900;
 515         month = tm.tm_mon + 1;
 516         day = tm.tm_mday;
 517
 518         /* Now see if a date was specified */
 519         if (strlen(bstr("year")) > 0) year = atoi(bstr("year"));
 520         if (strlen(bstr("month")) > 0) month = atoi(bstr("month"));
 521         if (strlen(bstr("day")) > 0) day = atoi(bstr("day"));
 522
 523         /* How would you like that cooked? */
 524         if (strlen(bstr("calview")) > 0) {
 525                 strcpy(calview, bstr("calview"));
 526         }
 527         else {
 528                 strcpy(calview, "month");
 529         }
 530
 531         /* Display the selected view */
 532         if (!strcasecmp(calview, "day")) {
 533                 calendar_day_view(year, month, day);
 534         }
 535         else if (!strcasecmp(calview, "week")) {
 536                 calendar_week_view(year, month, day);
 537         }
 538         else {
 539                 calendar_month_view(year, month, day);
 540         }
 541
 542         /* Free the calendar stuff */
 543         free_calendar_buffer();
 544
 545 }
 546
 547 #endif  /* WEBCIT_WITH_CALENDAR_SERVICE */