Pileus Git - lackey/blob - cals/ical.c

   1 /*
   2  * Copyright (C) 2012-2013 Andy Spencer <andy753421@gmail.com>
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #define _XOPEN_SOURCE
  19
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <wordexp.h>
  23 #include <libical/ical.h>
  24
  25 #include "util.h"
  26 #include "conf.h"
  27 #include "date.h"
  28 #include "cal.h"
  29
  30 /* Local types */
  31 typedef struct {
  32         cal_t *cal;
  33         icalcomponent *comp;
  34         struct icaltimetype start;
  35         struct icaltimetype end;
  36 } ical_inst;
  37
  38 typedef struct ical_t {
  39         cal_t          cal;
  40         char          *location;
  41         char          *username;
  42         char          *password;
  43         icalcomponent *comp;
  44         struct ical_t *next;
  45 } ical_t;
  46
  47 /* Static data */
  48 static ical_t *calendars;
  49
  50 /* Helper functions */
  51 static int ical_compare(const void *_a, const void *_b)
  52 {
  53         const ical_inst *a = _a;
  54         const ical_inst *b = _b;
  55         int scomp = icaltime_compare(a->start, b->start);
  56         int ecomp = icaltime_compare(a->end,   b->end);
  57         return scomp != 0 ? scomp :
  58                ecomp != 0 ? ecomp : 0 ;
  59 }
  60
  61 static date_t to_date(struct icaltimetype time)
  62 {
  63         return (date_t){
  64                 .year  = time.year,
  65                 .month = time.month ? time.month-1 : 0,
  66                 .day   = time.day   ? time.day  -1 : 0,
  67                 .hour  = time.hour,
  68                 .min   = time.minute,
  69         };
  70 }
  71
  72 static icaltimetype to_itime(date_t time)
  73 {
  74         return (struct icaltimetype){
  75                 .year   = time.year,
  76                 .month  = time.month + 1,
  77                 .day    = time.day   + 1,
  78                 .hour   = time.hour,
  79                 .minute = time.min
  80         };
  81 }
  82
  83 static void add_recur(cal_t *cal,
  84                 icalarray *array, icalcomponent *comp,
  85                 icaltimetype start, icaltimetype end,
  86                 icalcomponent_kind which)
  87 {
  88         icalcomponent_kind kind = icalcomponent_isa(comp);
  89
  90         if (kind == which) {
  91                 /* Get recurrence data */
  92                 struct icaltimetype cstart, cend; // Component times
  93                 struct icaltimetype istart, iend; // Instance times
  94                 struct icaldurationtype length;   // Duration
  95
  96                 icalproperty             *rrule;
  97                 struct icalrecurrencetype recur;
  98                 icalrecur_iterator       *iter;
  99
 100                 cstart = icalcomponent_get_dtstart(comp);
 101                 cend   = icalcomponent_get_dtend(comp);
 102                 length = icaltime_subtract(cend, cstart);
 103
 104                 /* Full day event */
 105                 if (icaltime_is_null_time(cstart) ||
 106                     which == ICAL_VTODO_COMPONENT) {
 107                         icalarray_append(array, &(ical_inst){
 108                                 .cal   = cal,
 109                                 .comp  = comp,
 110                                 .start = cstart,
 111                                 .end   = cend,
 112                         });
 113                 }
 114
 115                 /* Add all recurrences */
 116                 rrule = icalcomponent_get_first_property(comp, ICAL_RRULE_PROPERTY);
 117
 118                 /* One-time event */
 119                 if (!rrule) {
 120                         icalarray_append(array, &(ical_inst){
 121                                 .cal   = cal,
 122                                 .comp  = comp,
 123                                 .start = cstart,
 124                                 .end   = cend,
 125                         });
 126                 }
 127
 128                 /* Recurring events */
 129                 while (rrule) {
 130                         recur = icalproperty_get_rrule(rrule);
 131                         iter  = icalrecur_iterator_new(recur, cstart);
 132
 133                         /* Add recurrence for this rrule */
 134                         while (1) {
 135                                 istart = iend = icalrecur_iterator_next(iter);
 136                                 if (icaltime_is_null_time(istart))
 137                                         break;    // no more instances
 138                                 if (!icaltime_is_null_time(cend))
 139                                         iend = icaltime_add(iend, length);
 140
 141                                 if (icaltime_compare(iend, start) <= 0)
 142                                         continue; // instance ends before start time
 143                                 if (icaltime_compare(istart, end) >= 0)
 144                                         break;    // instance begins after stop time
 145
 146                                 icalarray_append(array, &(ical_inst){
 147                                         .cal   = cal,
 148                                         .comp  = comp,
 149                                         .start = istart,
 150                                         .end   = iend,
 151                                 });
 152                         }
 153
 154                         icalrecur_iterator_free(iter);
 155                         rrule = icalcomponent_get_next_property(comp, ICAL_RRULE_PROPERTY);
 156                 }
 157         }
 158
 159         /* Add children */
 160         icalcomponent_kind find = ICAL_ANY_COMPONENT;
 161         icalcomponent *child = icalcomponent_get_first_component(comp, find);
 162         while (child) {
 163                 add_recur(cal, array, child, start, end, which);
 164                 child = icalcomponent_get_next_component(comp, find);
 165         }
 166 }
 167
 168 static void read_icals(void)
 169 {
 170         for (ical_t *cal = calendars; cal; cal = cal->next) {
 171                 if (cal->comp == NULL && cal->location) {
 172                         wordexp_t wexp;
 173                         wordexp(cal->location, &wexp, WRDE_NOCMD);
 174                         icalparser *parser = icalparser_new();
 175                         for (int i = 0; i < wexp.we_wordc; i++) {
 176                                 FILE *file = fopen(wexp.we_wordv[i], "r");
 177                                 if (!file)
 178                                         continue;
 179                                 icalparser_set_gen_data(parser, file);
 180                         }
 181                         cal->comp = icalparser_parse(parser, (void*)fgets);
 182                         icalparser_free(parser);
 183                         wordfree(&wexp);
 184                 }
 185         }
 186 }
 187
 188 /* Event functions */
 189 static event_t *to_event(ical_inst *inst)
 190 {
 191         icalproperty *prop = icalcomponent_get_first_property(inst->comp, ICAL_CATEGORIES_PROPERTY);
 192
 193         event_t *event = new0(event_t);
 194         event->name  = strcopy(icalcomponent_get_summary(inst->comp));
 195         event->desc  = strcopy(icalcomponent_get_description(inst->comp));
 196         event->loc   = strcopy(icalcomponent_get_location(inst->comp));
 197         event->cat   = icalproperty_get_value_as_string_r(prop);
 198         event->start = to_date(inst->start);
 199         event->end   = to_date(inst->end);
 200         event->cal   = inst->cal;
 201         return event;
 202 }
 203
 204 static event_t *to_events(icalarray *array)
 205 {
 206         event_t  list = {};
 207         event_t *tail = &list;
 208         for (int i = 0; i < array->num_elements; i++) {
 209                  ical_inst *inst = icalarray_element_at(array, i);
 210                  tail->next = to_event(inst);
 211                  tail = tail->next;
 212         }
 213         return list.next;
 214 }
 215
 216 static void print_events(event_t *start)
 217 {
 218         for (event_t *cur = start; cur; cur = cur->next)
 219                 printf("%04d-%02d-%02d %02d:%02d - %s\n",
 220                         cur->start.year, cur->start.month, cur->start.day,
 221                         cur->start.hour, cur->start.min,
 222                         cur->name ?: cur->desc ?: "[no summary]");
 223 }
 224
 225 /* Todo functions */
 226 static todo_t *to_todo(ical_inst *inst)
 227 {
 228         icalproperty *cat  = icalcomponent_get_first_property(inst->comp, ICAL_CATEGORIES_PROPERTY);
 229         icalproperty *perc = icalcomponent_get_first_property(inst->comp, ICAL_PERCENTCOMPLETE_PROPERTY);
 230
 231         todo_t *todo = new0(todo_t);
 232         todo->name   = strcopy(icalcomponent_get_summary(inst->comp));
 233         todo->desc   = strcopy(icalcomponent_get_description(inst->comp));
 234         todo->cat    = strcopy(icalproperty_get_value_as_string(cat));
 235         todo->status = icalcomponent_get_status(inst->comp) == ICAL_STATUS_COMPLETED ? 100 :
 236                        perc ? icalproperty_get_percentcomplete(perc) : 0;
 237         todo->start  = to_date(inst->start);
 238         todo->due    = to_date(icalcomponent_get_due(inst->comp));
 239         todo->cal    = inst->cal;
 240         return todo;
 241 }
 242
 243 static todo_t *to_todos(icalarray *array)
 244 {
 245         todo_t  list = {};
 246         todo_t *tail = &list;
 247         for (int i = 0; i < array->num_elements; i++) {
 248                  ical_inst *inst = icalarray_element_at(array, i);
 249                  tail->next = to_todo(inst);
 250                  tail = tail->next;
 251         }
 252         return list.next;
 253 }
 254
 255 static void print_todos(todo_t *start)
 256 {
 257         for (todo_t *cur = start; cur; cur = cur->next)
 258                 printf("%04d-%02d-%02d %02d:%02d - %d%% - %s\n",
 259                         cur->due.year, cur->due.month, cur->due.day,
 260                         cur->due.hour, cur->due.min,   cur->status,
 261                         cur->name ?: cur->desc ?: "[no summary]");
 262 }
 263
 264 /* Config parser */
 265 void ical_config(const char *group, const char *name, const char *key, const char *value)
 266 {
 267         ical_t *cal = NULL, *last = NULL;
 268
 269         /* Make sure it's valid */
 270         if (!match(group, "ical") || !name)
 271                 return;
 272
 273         /* Find existing calendar */
 274         for (cal = calendars; cal; last = cal, cal = cal->next)
 275                 if (match(cal->cal.name, name))
 276                         break;
 277
 278         /* Create new calendar */
 279         if (!cal) {
 280                 cal = new0(ical_t);
 281                 cal->cal.type = "ical";
 282                 cal->cal.name = get_name(name);
 283                 if (last)
 284                         last->next = cal;
 285                 else
 286                         calendars = cal;
 287                 return;
 288         }
 289
 290         /* Set calendar values */
 291         if (match(key, "location"))
 292                 cal->location = get_string(value);
 293         else if (match(key, "username"))
 294                 cal->username = get_string(value);
 295         else if (match(key, "password"))
 296                 cal->password = get_string(value);
 297 }
 298
 299 /* Cal functions */
 300 cal_t *ical_cals(void)
 301 {
 302         read_icals();
 303
 304         for (ical_t *cal = calendars; cal; cal = cal->next)
 305                 cal->cal.next = &cal->next->cal;
 306
 307         return &calendars->cal;
 308 }
 309
 310 /* Event functions */
 311 event_t *ical_events(date_t _start, date_t _end)
 312 {
 313         read_icals();
 314
 315         icaltimetype start = to_itime(_start);
 316         icaltimetype end   = to_itime(_end);
 317         icalarray *array = icalarray_new(sizeof(ical_inst), 1);
 318         for (ical_t *cal = calendars; cal; cal = cal->next)
 319                 add_recur(&cal->cal, array, cal->comp, start, end, ICAL_VEVENT_COMPONENT);
 320         icalarray_sort(array, ical_compare);
 321         event_t *events = to_events(array);
 322         icalarray_free(array);
 323
 324         return events;
 325 }
 326
 327 /* Todo functions */
 328 todo_t *ical_todos(date_t _start, date_t _end)
 329 {
 330         read_icals();
 331
 332         icaltimetype start = to_itime(_start);
 333         icaltimetype end   = to_itime(_end);
 334         icalarray *array = icalarray_new(sizeof(ical_inst), 1);
 335         for (ical_t *cal = calendars; cal; cal = cal->next)
 336                 add_recur(&cal->cal, array, cal->comp, start, end, ICAL_VTODO_COMPONENT);
 337         icalarray_sort(array, ical_compare);
 338         todo_t *todos = to_todos(array);
 339         icalarray_free(array);
 340
 341         return todos;
 342 }
 343
 344 /* Test functions */
 345 void ical_printr(icalcomponent *comp, int depth)
 346 {
 347         /* Print component */
 348         icalcomponent_kind kind = icalcomponent_isa(comp);
 349         printf("%*s", depth, "");
 350         printf("%s",  icalcomponent_kind_to_string(kind));
 351         if (kind == ICAL_VEVENT_COMPONENT ||
 352             kind == ICAL_VTODO_COMPONENT)
 353                 printf(" - %s", icalcomponent_get_summary(comp) ?: "[no summary]");
 354         printf("\n");
 355
 356         /* Print children */
 357         icalcomponent_kind find = ICAL_ANY_COMPONENT;
 358         icalcomponent *child = icalcomponent_get_first_component(comp, find);
 359         while (child) {
 360                 ical_printr(child, depth+2);
 361                 child = icalcomponent_get_next_component(comp, find);
 362         }
 363 }
 364
 365 void ical_test(char *path)
 366 {
 367         /* Load ical */
 368         FILE *file = fopen(path, "r");
 369         icalparser *parser = icalparser_new();
 370         icalparser_set_gen_data(parser, file);
 371         icalcomponent *comp = icalparser_parse(parser, (void*)fgets);
 372
 373         /* Misc */
 374         icalarray *array;
 375         icaltimetype start = {.year = 2000};
 376         icaltimetype end   = {.year = 2020};
 377
 378         /* Find events */
 379         array = icalarray_new(sizeof(ical_inst), 1);
 380         add_recur(NULL, array, comp, start, end, ICAL_VEVENT_COMPONENT);
 381         icalarray_sort(array, ical_compare);
 382         event_t *events = to_events(array);
 383         icalarray_free(array);
 384
 385         /* Find Todos */
 386         array = icalarray_new(sizeof(ical_inst), 1);
 387         add_recur(NULL, array, comp, start, end, ICAL_VTODO_COMPONENT);
 388         icalarray_sort(array, ical_compare);
 389         todo_t *todos = to_todos(array);
 390         icalarray_free(array);
 391
 392         /* Print */
 393         ical_printr(comp, 0);
 394         print_events(events);
 395         print_todos(todos);
 396
 397         (void)print_events;
 398         (void)print_todos;
 399         (void)events;
 400         (void)todos;
 401
 402         /* Cleanup */
 403         icalparser_free(parser);
 404 }