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                 rrule  = icalcomponent_get_first_property(comp, ICAL_RRULE_PROPERTY);
 105                 recur  = icalproperty_get_rrule(rrule);
 106                 iter   = icalrecur_iterator_new(recur, cstart);
 107
 108                 /* Add recurrences */
 109                 if (icaltime_is_null_time(cstart) ||
 110                     which == ICAL_VTODO_COMPONENT) {
 111                         icalarray_append(array, &(ical_inst){
 112                                 .cal   = cal,
 113                                 .comp  = comp,
 114                                 .start = cstart,
 115                                 .end   = cend,
 116                         });
 117                 } else while (1) {
 118                         istart = iend = icalrecur_iterator_next(iter);
 119                         if (icaltime_is_null_time(istart))
 120                                 break;    // no more instances
 121                         if (!icaltime_is_null_time(cend))
 122                                 iend = icaltime_add(iend, length);
 123
 124                         if (icaltime_compare(iend, start) <= 0)
 125                                 continue; // instance ends before start time
 126                         if (icaltime_compare(istart, end) >= 0)
 127                                 break;    // instance begins after stop time
 128
 129                         icalarray_append(array, &(ical_inst){
 130                                 .cal   = cal,
 131                                 .comp  = comp,
 132                                 .start = istart,
 133                                 .end   = iend,
 134                         });
 135                 }
 136
 137                 icalrecur_iterator_free(iter);
 138         }
 139
 140         /* Add children */
 141         icalcomponent_kind find = ICAL_ANY_COMPONENT;
 142         icalcomponent *child = icalcomponent_get_first_component(comp, find);
 143         while (child) {
 144                 add_recur(cal, array, child, start, end, which);
 145                 child = icalcomponent_get_next_component(comp, find);
 146         }
 147 }
 148
 149 static void read_icals(void)
 150 {
 151         for (ical_t *cal = calendars; cal; cal = cal->next) {
 152                 if (cal->comp == NULL && cal->location) {
 153                         wordexp_t wexp;
 154                         wordexp(cal->location, &wexp, WRDE_NOCMD);
 155                         if (wexp.we_wordc == 0)
 156                                 continue;
 157                         FILE *file = fopen(wexp.we_wordv[0], "r");
 158                         wordfree(&wexp);
 159                         if (!file)
 160                                 continue;
 161
 162                         icalparser *parser = icalparser_new();
 163                         icalparser_set_gen_data(parser, file);
 164                         cal->comp = icalparser_parse(parser, (void*)fgets);
 165                         icalparser_free(parser);
 166                 }
 167         }
 168 }
 169
 170 /* Event functions */
 171 static event_t *to_event(ical_inst *inst)
 172 {
 173         icalproperty *prop = icalcomponent_get_first_property(inst->comp, ICAL_CATEGORIES_PROPERTY);
 174
 175         event_t *event = new0(event_t);
 176         event->name  = strcopy(icalcomponent_get_summary(inst->comp));
 177         event->desc  = strcopy(icalcomponent_get_description(inst->comp));
 178         event->loc   = strcopy(icalcomponent_get_location(inst->comp));
 179         event->cat   = icalproperty_get_value_as_string_r(prop);
 180         event->start = to_date(inst->start);
 181         event->end   = to_date(inst->end);
 182         event->cal   = inst->cal;
 183         return event;
 184 }
 185
 186 static event_t *to_events(icalarray *array)
 187 {
 188         event_t  list = {};
 189         event_t *tail = &list;
 190         for (int i = 0; i < array->num_elements; i++) {
 191                  ical_inst *inst = icalarray_element_at(array, i);
 192                  tail->next = to_event(inst);
 193                  tail = tail->next;
 194         }
 195         return list.next;
 196 }
 197
 198 static void print_events(event_t *start)
 199 {
 200         for (event_t *cur = start; cur; cur = cur->next)
 201                 printf("%04d-%02d-%02d %02d:%02d - %s\n",
 202                         cur->start.year, cur->start.month, cur->start.day,
 203                         cur->start.hour, cur->start.min,
 204                         cur->name ?: cur->desc ?: "[no summary]");
 205 }
 206
 207 /* Todo functions */
 208 static todo_t *to_todo(ical_inst *inst)
 209 {
 210         icalproperty *cat  = icalcomponent_get_first_property(inst->comp, ICAL_CATEGORIES_PROPERTY);
 211         icalproperty *perc = icalcomponent_get_first_property(inst->comp, ICAL_PERCENTCOMPLETE_PROPERTY);
 212
 213         todo_t *todo = new0(todo_t);
 214         todo->name   = strcopy(icalcomponent_get_summary(inst->comp));
 215         todo->desc   = strcopy(icalcomponent_get_description(inst->comp));
 216         todo->cat    = strcopy(icalproperty_get_value_as_string(cat));
 217         todo->status = icalcomponent_get_status(inst->comp) == ICAL_STATUS_COMPLETED ? 100 :
 218                        perc ? icalproperty_get_percentcomplete(perc) : 0;
 219         todo->start  = to_date(inst->start);
 220         todo->due    = to_date(icalcomponent_get_due(inst->comp));
 221         todo->cal    = inst->cal;
 222         return todo;
 223 }
 224
 225 static todo_t *to_todos(icalarray *array)
 226 {
 227         todo_t  list = {};
 228         todo_t *tail = &list;
 229         for (int i = 0; i < array->num_elements; i++) {
 230                  ical_inst *inst = icalarray_element_at(array, i);
 231                  tail->next = to_todo(inst);
 232                  tail = tail->next;
 233         }
 234         return list.next;
 235 }
 236
 237 static void print_todos(todo_t *start)
 238 {
 239         for (todo_t *cur = start; cur; cur = cur->next)
 240                 printf("%04d-%02d-%02d %02d:%02d - %d%% - %s\n",
 241                         cur->due.year, cur->due.month, cur->due.day,
 242                         cur->due.hour, cur->due.min,   cur->status,
 243                         cur->name ?: cur->desc ?: "[no summary]");
 244 }
 245
 246 /* Config parser */
 247 void ical_config(const char *group, const char *name, const char *key, const char *value)
 248 {
 249         ical_t *cal = NULL, *last = NULL;
 250
 251         /* Make sure it's valid */
 252         if (!match(group, "ical") || !name)
 253                 return;
 254
 255         /* Find existing calendar */
 256         for (cal = calendars; cal; last = cal, cal = cal->next)
 257                 if (match(cal->cal.name, name))
 258                         break;
 259
 260         /* Create new calendar */
 261         if (!cal) {
 262                 cal = new0(ical_t);
 263                 cal->cal.type = "ical";
 264                 cal->cal.name = get_name(name);
 265                 if (last)
 266                         last->next = cal;
 267                 else
 268                         calendars = cal;
 269                 return;
 270         }
 271
 272         /* Set calendar values */
 273         if (match(key, "location"))
 274                 cal->location = get_string(value);
 275         else if (match(key, "username"))
 276                 cal->username = get_string(value);
 277         else if (match(key, "password"))
 278                 cal->password = get_string(value);
 279 }
 280
 281 /* Cal functions */
 282 cal_t *ical_cals(void)
 283 {
 284         read_icals();
 285
 286         for (ical_t *cal = calendars; cal; cal = cal->next)
 287                 cal->cal.next = &cal->next->cal;
 288
 289         return &calendars->cal;
 290 }
 291
 292 /* Event functions */
 293 event_t *ical_events(date_t _start, date_t _end)
 294 {
 295         read_icals();
 296
 297         icaltimetype start = to_itime(_start);
 298         icaltimetype end   = to_itime(_end);
 299         icalarray *array = icalarray_new(sizeof(ical_inst), 1);
 300         for (ical_t *cal = calendars; cal; cal = cal->next)
 301                 add_recur(&cal->cal, array, cal->comp, start, end, ICAL_VEVENT_COMPONENT);
 302         icalarray_sort(array, ical_compare);
 303         event_t *events = to_events(array);
 304         icalarray_free(array);
 305
 306         return events;
 307 }
 308
 309 /* Todo functions */
 310 todo_t *ical_todos(date_t _start, date_t _end)
 311 {
 312         read_icals();
 313
 314         icaltimetype start = to_itime(_start);
 315         icaltimetype end   = to_itime(_end);
 316         icalarray *array = icalarray_new(sizeof(ical_inst), 1);
 317         for (ical_t *cal = calendars; cal; cal = cal->next)
 318                 add_recur(&cal->cal, array, cal->comp, start, end, ICAL_VTODO_COMPONENT);
 319         icalarray_sort(array, ical_compare);
 320         todo_t *todos = to_todos(array);
 321         icalarray_free(array);
 322
 323         return todos;
 324 }
 325
 326 /* Test functions */
 327 void ical_printr(icalcomponent *comp, int depth)
 328 {
 329         /* Print component */
 330         icalcomponent_kind kind = icalcomponent_isa(comp);
 331         printf("%*s", depth, "");
 332         printf("%s",  icalcomponent_kind_to_string(kind));
 333         if (kind == ICAL_VEVENT_COMPONENT ||
 334             kind == ICAL_VTODO_COMPONENT)
 335                 printf(" - %s", icalcomponent_get_summary(comp) ?: "[no summary]");
 336         printf("\n");
 337
 338         /* Print children */
 339         icalcomponent_kind find = ICAL_ANY_COMPONENT;
 340         icalcomponent *child = icalcomponent_get_first_component(comp, find);
 341         while (child) {
 342                 ical_printr(child, depth+2);
 343                 child = icalcomponent_get_next_component(comp, find);
 344         }
 345 }
 346
 347 void ical_test(void)
 348 {
 349         /* Load ical */
 350         FILE *file = fopen("data/all.ics", "r");
 351         icalparser *parser = icalparser_new();
 352         icalparser_set_gen_data(parser, file);
 353         icalcomponent *comp = icalparser_parse(parser, (void*)fgets);
 354
 355         /* Misc */
 356         icalarray *array;
 357         icaltimetype start = {.year = 2000};
 358         icaltimetype end   = {.year = 2020};
 359
 360         /* Find events */
 361         array = icalarray_new(sizeof(ical_inst), 1);
 362         add_recur(NULL, array, comp, start, end, ICAL_VEVENT_COMPONENT);
 363         icalarray_sort(array, ical_compare);
 364         event_t *events = to_events(array);
 365         icalarray_free(array);
 366
 367         /* Find Todos */
 368         array = icalarray_new(sizeof(ical_inst), 1);
 369         add_recur(NULL, array, comp, start, end, ICAL_VTODO_COMPONENT);
 370         icalarray_sort(array, ical_compare);
 371         todo_t *todos = to_todos(array);
 372         icalarray_free(array);
 373
 374         /* Print */
 375         ical_printr(comp, 0);
 376         print_events(events);
 377         print_todos(todos);
 378
 379         (void)print_events;
 380         (void)print_todos;
 381         (void)events;
 382         (void)todos;
 383
 384         /* Cleanup */
 385         icalparser_free(parser);
 386 }