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                 while (rrule) {
 118                         recur = icalproperty_get_rrule(rrule);
 119                         iter  = icalrecur_iterator_new(recur, cstart);
 120
 121                         /* Add recurrence for this rrule */
 122                         while (1) {
 123                                 istart = iend = icalrecur_iterator_next(iter);
 124                                 if (icaltime_is_null_time(istart))
 125                                         break;    // no more instances
 126                                 if (!icaltime_is_null_time(cend))
 127                                         iend = icaltime_add(iend, length);
 128
 129                                 if (icaltime_compare(iend, start) <= 0)
 130                                         continue; // instance ends before start time
 131                                 if (icaltime_compare(istart, end) >= 0)
 132                                         break;    // instance begins after stop time
 133
 134                                 icalarray_append(array, &(ical_inst){
 135                                         .cal   = cal,
 136                                         .comp  = comp,
 137                                         .start = istart,
 138                                         .end   = iend,
 139                                 });
 140                         }
 141
 142                         icalrecur_iterator_free(iter);
 143                         rrule = icalcomponent_get_next_property(comp, ICAL_RRULE_PROPERTY);
 144                 }
 145         }
 146
 147         /* Add children */
 148         icalcomponent_kind find = ICAL_ANY_COMPONENT;
 149         icalcomponent *child = icalcomponent_get_first_component(comp, find);
 150         while (child) {
 151                 add_recur(cal, array, child, start, end, which);
 152                 child = icalcomponent_get_next_component(comp, find);
 153         }
 154 }
 155
 156 static void read_icals(void)
 157 {
 158         for (ical_t *cal = calendars; cal; cal = cal->next) {
 159                 if (cal->comp == NULL && cal->location) {
 160                         wordexp_t wexp;
 161                         wordexp(cal->location, &wexp, WRDE_NOCMD);
 162                         icalparser *parser = icalparser_new();
 163                         for (int i = 0; i < wexp.we_wordc; i++) {
 164                                 FILE *file = fopen(wexp.we_wordv[i], "r");
 165                                 if (!file)
 166                                         continue;
 167                                 icalparser_set_gen_data(parser, file);
 168                         }
 169                         cal->comp = icalparser_parse(parser, (void*)fgets);
 170                         icalparser_free(parser);
 171                         wordfree(&wexp);
 172                 }
 173         }
 174 }
 175
 176 /* Event functions */
 177 static event_t *to_event(ical_inst *inst)
 178 {
 179         icalproperty *prop = icalcomponent_get_first_property(inst->comp, ICAL_CATEGORIES_PROPERTY);
 180
 181         event_t *event = new0(event_t);
 182         event->name  = strcopy(icalcomponent_get_summary(inst->comp));
 183         event->desc  = strcopy(icalcomponent_get_description(inst->comp));
 184         event->loc   = strcopy(icalcomponent_get_location(inst->comp));
 185         event->cat   = icalproperty_get_value_as_string_r(prop);
 186         event->start = to_date(inst->start);
 187         event->end   = to_date(inst->end);
 188         event->cal   = inst->cal;
 189         return event;
 190 }
 191
 192 static event_t *to_events(icalarray *array)
 193 {
 194         event_t  list = {};
 195         event_t *tail = &list;
 196         for (int i = 0; i < array->num_elements; i++) {
 197                  ical_inst *inst = icalarray_element_at(array, i);
 198                  tail->next = to_event(inst);
 199                  tail = tail->next;
 200         }
 201         return list.next;
 202 }
 203
 204 static void print_events(event_t *start)
 205 {
 206         for (event_t *cur = start; cur; cur = cur->next)
 207                 printf("%04d-%02d-%02d %02d:%02d - %s\n",
 208                         cur->start.year, cur->start.month, cur->start.day,
 209                         cur->start.hour, cur->start.min,
 210                         cur->name ?: cur->desc ?: "[no summary]");
 211 }
 212
 213 /* Todo functions */
 214 static todo_t *to_todo(ical_inst *inst)
 215 {
 216         icalproperty *cat  = icalcomponent_get_first_property(inst->comp, ICAL_CATEGORIES_PROPERTY);
 217         icalproperty *perc = icalcomponent_get_first_property(inst->comp, ICAL_PERCENTCOMPLETE_PROPERTY);
 218
 219         todo_t *todo = new0(todo_t);
 220         todo->name   = strcopy(icalcomponent_get_summary(inst->comp));
 221         todo->desc   = strcopy(icalcomponent_get_description(inst->comp));
 222         todo->cat    = strcopy(icalproperty_get_value_as_string(cat));
 223         todo->status = icalcomponent_get_status(inst->comp) == ICAL_STATUS_COMPLETED ? 100 :
 224                        perc ? icalproperty_get_percentcomplete(perc) : 0;
 225         todo->start  = to_date(inst->start);
 226         todo->due    = to_date(icalcomponent_get_due(inst->comp));
 227         todo->cal    = inst->cal;
 228         return todo;
 229 }
 230
 231 static todo_t *to_todos(icalarray *array)
 232 {
 233         todo_t  list = {};
 234         todo_t *tail = &list;
 235         for (int i = 0; i < array->num_elements; i++) {
 236                  ical_inst *inst = icalarray_element_at(array, i);
 237                  tail->next = to_todo(inst);
 238                  tail = tail->next;
 239         }
 240         return list.next;
 241 }
 242
 243 static void print_todos(todo_t *start)
 244 {
 245         for (todo_t *cur = start; cur; cur = cur->next)
 246                 printf("%04d-%02d-%02d %02d:%02d - %d%% - %s\n",
 247                         cur->due.year, cur->due.month, cur->due.day,
 248                         cur->due.hour, cur->due.min,   cur->status,
 249                         cur->name ?: cur->desc ?: "[no summary]");
 250 }
 251
 252 /* Config parser */
 253 void ical_config(const char *group, const char *name, const char *key, const char *value)
 254 {
 255         ical_t *cal = NULL, *last = NULL;
 256
 257         /* Make sure it's valid */
 258         if (!match(group, "ical") || !name)
 259                 return;
 260
 261         /* Find existing calendar */
 262         for (cal = calendars; cal; last = cal, cal = cal->next)
 263                 if (match(cal->cal.name, name))
 264                         break;
 265
 266         /* Create new calendar */
 267         if (!cal) {
 268                 cal = new0(ical_t);
 269                 cal->cal.type = "ical";
 270                 cal->cal.name = get_name(name);
 271                 if (last)
 272                         last->next = cal;
 273                 else
 274                         calendars = cal;
 275                 return;
 276         }
 277
 278         /* Set calendar values */
 279         if (match(key, "location"))
 280                 cal->location = get_string(value);
 281         else if (match(key, "username"))
 282                 cal->username = get_string(value);
 283         else if (match(key, "password"))
 284                 cal->password = get_string(value);
 285 }
 286
 287 /* Cal functions */
 288 cal_t *ical_cals(void)
 289 {
 290         read_icals();
 291
 292         for (ical_t *cal = calendars; cal; cal = cal->next)
 293                 cal->cal.next = &cal->next->cal;
 294
 295         return &calendars->cal;
 296 }
 297
 298 /* Event functions */
 299 event_t *ical_events(date_t _start, date_t _end)
 300 {
 301         read_icals();
 302
 303         icaltimetype start = to_itime(_start);
 304         icaltimetype end   = to_itime(_end);
 305         icalarray *array = icalarray_new(sizeof(ical_inst), 1);
 306         for (ical_t *cal = calendars; cal; cal = cal->next)
 307                 add_recur(&cal->cal, array, cal->comp, start, end, ICAL_VEVENT_COMPONENT);
 308         icalarray_sort(array, ical_compare);
 309         event_t *events = to_events(array);
 310         icalarray_free(array);
 311
 312         return events;
 313 }
 314
 315 /* Todo functions */
 316 todo_t *ical_todos(date_t _start, date_t _end)
 317 {
 318         read_icals();
 319
 320         icaltimetype start = to_itime(_start);
 321         icaltimetype end   = to_itime(_end);
 322         icalarray *array = icalarray_new(sizeof(ical_inst), 1);
 323         for (ical_t *cal = calendars; cal; cal = cal->next)
 324                 add_recur(&cal->cal, array, cal->comp, start, end, ICAL_VTODO_COMPONENT);
 325         icalarray_sort(array, ical_compare);
 326         todo_t *todos = to_todos(array);
 327         icalarray_free(array);
 328
 329         return todos;
 330 }
 331
 332 /* Test functions */
 333 void ical_printr(icalcomponent *comp, int depth)
 334 {
 335         /* Print component */
 336         icalcomponent_kind kind = icalcomponent_isa(comp);
 337         printf("%*s", depth, "");
 338         printf("%s",  icalcomponent_kind_to_string(kind));
 339         if (kind == ICAL_VEVENT_COMPONENT ||
 340             kind == ICAL_VTODO_COMPONENT)
 341                 printf(" - %s", icalcomponent_get_summary(comp) ?: "[no summary]");
 342         printf("\n");
 343
 344         /* Print children */
 345         icalcomponent_kind find = ICAL_ANY_COMPONENT;
 346         icalcomponent *child = icalcomponent_get_first_component(comp, find);
 347         while (child) {
 348                 ical_printr(child, depth+2);
 349                 child = icalcomponent_get_next_component(comp, find);
 350         }
 351 }
 352
 353 void ical_test(void)
 354 {
 355         /* Load ical */
 356         FILE *file = fopen("data/all.ics", "r");
 357         icalparser *parser = icalparser_new();
 358         icalparser_set_gen_data(parser, file);
 359         icalcomponent *comp = icalparser_parse(parser, (void*)fgets);
 360
 361         /* Misc */
 362         icalarray *array;
 363         icaltimetype start = {.year = 2000};
 364         icaltimetype end   = {.year = 2020};
 365
 366         /* Find events */
 367         array = icalarray_new(sizeof(ical_inst), 1);
 368         add_recur(NULL, array, comp, start, end, ICAL_VEVENT_COMPONENT);
 369         icalarray_sort(array, ical_compare);
 370         event_t *events = to_events(array);
 371         icalarray_free(array);
 372
 373         /* Find Todos */
 374         array = icalarray_new(sizeof(ical_inst), 1);
 375         add_recur(NULL, array, comp, start, end, ICAL_VTODO_COMPONENT);
 376         icalarray_sort(array, ical_compare);
 377         todo_t *todos = to_todos(array);
 378         icalarray_free(array);
 379
 380         /* Print */
 381         ical_printr(comp, 0);
 382         print_events(events);
 383         print_todos(todos);
 384
 385         (void)print_events;
 386         (void)print_todos;
 387         (void)events;
 388         (void)todos;
 389
 390         /* Cleanup */
 391         icalparser_free(parser);
 392 }