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