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

   1 /*
   2  * Copyright (C) 2012 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         icalcomponent *comp;
  33         struct icaltimetype start;
  34         struct icaltimetype end;
  35 } ical_inst;
  36
  37 typedef struct ical_t {
  38         char          *name;
  39         char          *location;
  40         char          *username;
  41         char          *password;
  42         icalcomponent *ical;
  43         struct ical_t *next;
  44 } ical_t;
  45
  46 /* Static data */
  47 static ical_t *calendars;
  48
  49 /* Helper functions */
  50 static int ical_compare(const void *_a, const void *_b)
  51 {
  52         const ical_inst *a = _a;
  53         const ical_inst *b = _b;
  54         int scomp = icaltime_compare(a->start, b->start);
  55         int ecomp = icaltime_compare(a->end,   b->end);
  56         return scomp != 0 ? scomp :
  57                ecomp != 0 ? ecomp : 0 ;
  58 }
  59
  60 static date_t to_date(struct icaltimetype time)
  61 {
  62         return (date_t){
  63                 .year  = time.year,
  64                 .month = time.month ? time.month-1 : 0,
  65                 .day   = time.day   ? time.day  -1 : 0,
  66                 .hour  = time.hour,
  67                 .min   = time.minute,
  68         };
  69 }
  70
  71 static icaltimetype to_itime(date_t time)
  72 {
  73         return (struct icaltimetype){
  74                 .year   = time.year,
  75                 .month  = time.month + 1,
  76                 .day    = time.day   + 1,
  77                 .hour   = time.hour,
  78                 .minute = time.min
  79         };
  80 }
  81
  82 static void add_recur(icalarray *array, icalcomponent *comp,
  83                 icaltimetype start, icaltimetype end,
  84                 icalcomponent_kind which)
  85 {
  86         icalcomponent_kind kind = icalcomponent_isa(comp);
  87
  88         if (kind == which) {
  89                 /* Get recurrence data */
  90                 struct icaltimetype cstart, cend; // Component times
  91                 struct icaltimetype istart, iend; // Instance times
  92                 struct icaldurationtype length;   // Duration
  93
  94                 icalproperty             *rrule;
  95                 struct icalrecurrencetype recur;
  96                 icalrecur_iterator       *iter;
  97
  98                 cstart = icalcomponent_get_dtstart(comp);
  99                 cend   = icalcomponent_get_dtend(comp);
 100                 length = icaltime_subtract(cend, cstart);
 101
 102                 rrule  = icalcomponent_get_first_property(comp, ICAL_RRULE_PROPERTY);
 103                 recur  = icalproperty_get_rrule(rrule);
 104                 iter   = icalrecur_iterator_new(recur, cstart);
 105
 106                 /* Add recurrences */
 107                 if (icaltime_is_null_time(cstart) ||
 108                     which == ICAL_VTODO_COMPONENT) {
 109                         icalarray_append(array, &(ical_inst){
 110                                 .comp  = comp,
 111                                 .start = cstart,
 112                                 .end   = cend,
 113                         });
 114                 } else while (1) {
 115                         istart = iend = icalrecur_iterator_next(iter);
 116                         if (icaltime_is_null_time(istart))
 117                                 break;    // no more instances
 118                         if (!icaltime_is_null_time(cend))
 119                                 iend = icaltime_add(iend, length);
 120
 121                         if (icaltime_compare(iend, start) <= 0)
 122                                 continue; // instance ends before start time
 123                         if (icaltime_compare(istart, end) >= 0)
 124                                 break;    // instance begins after stop time
 125
 126                         icalarray_append(array, &(ical_inst){
 127                                 .comp  = comp,
 128                                 .start = istart,
 129                                 .end   = iend,
 130                         });
 131                 }
 132
 133                 icalrecur_iterator_free(iter);
 134         }
 135
 136         /* Add children */
 137         icalcomponent_kind find = ICAL_ANY_COMPONENT;
 138         icalcomponent *child = icalcomponent_get_first_component(comp, find);
 139         while (child) {
 140                 add_recur(array, child, start, end, which);
 141                 child = icalcomponent_get_next_component(comp, find);
 142         }
 143 }
 144
 145 static void read_icals(void)
 146 {
 147         for (ical_t *cal = calendars; cal; cal = cal->next) {
 148                 if (cal->ical == NULL && cal->location) {
 149                         wordexp_t wexp;
 150                         wordexp(cal->location, &wexp, WRDE_NOCMD);
 151                         if (wexp.we_wordc == 0)
 152                                 continue;
 153                         FILE *file = fopen(wexp.we_wordv[0], "r");
 154                         wordfree(&wexp);
 155                         if (!file)
 156                                 continue;
 157
 158                         icalparser *parser = icalparser_new();
 159                         icalparser_set_gen_data(parser, file);
 160                         cal->ical = icalparser_parse(parser, (void*)fgets);
 161                         icalparser_free(parser);
 162                 }
 163         }
 164 }
 165
 166 /* Event functions */
 167 static event_t *to_event(ical_inst *inst)
 168 {
 169         icalproperty *prop = icalcomponent_get_first_property(inst->comp, ICAL_CATEGORIES_PROPERTY);
 170
 171         event_t *event = new0(event_t);
 172         event->name  = strcopy(icalcomponent_get_summary(inst->comp));
 173         event->desc  = strcopy(icalcomponent_get_description(inst->comp));
 174         event->loc   = strcopy(icalcomponent_get_location(inst->comp));
 175         event->cat   = icalproperty_get_value_as_string_r(prop);
 176         event->start = to_date(inst->start);
 177         event->end   = to_date(inst->end);
 178         return event;
 179 }
 180
 181 static event_t *to_events(icalarray *array)
 182 {
 183         event_t  list = {};
 184         event_t *tail = &list;
 185         for (int i = 0; i < array->num_elements; i++) {
 186                  ical_inst *inst = icalarray_element_at(array, i);
 187                  tail->next = to_event(inst);
 188                  tail = tail->next;
 189         }
 190         return list.next;
 191 }
 192
 193 static void print_events(event_t *start)
 194 {
 195         for (event_t *cur = start; cur; cur = cur->next)
 196                 printf("%04d-%02d-%02d %02d:%02d - %s\n",
 197                         cur->start.year, cur->start.month, cur->start.day,
 198                         cur->start.hour, cur->start.min,
 199                         cur->name ?: cur->desc ?: "[no summary]");
 200 }
 201
 202 /* Todo functions */
 203 static todo_t *to_todo(ical_inst *inst)
 204 {
 205         icalproperty *cat  = icalcomponent_get_first_property(inst->comp, ICAL_CATEGORIES_PROPERTY);
 206         icalproperty *perc = icalcomponent_get_first_property(inst->comp, ICAL_PERCENTCOMPLETE_PROPERTY);
 207
 208         todo_t *todo = new0(todo_t);
 209         todo->name   = strcopy(icalcomponent_get_summary(inst->comp));
 210         todo->desc   = strcopy(icalcomponent_get_description(inst->comp));
 211         todo->cat    = strcopy(icalproperty_get_value_as_string(cat));
 212         todo->status = icalcomponent_get_status(inst->comp) == ICAL_STATUS_COMPLETED ? 100 :
 213                        perc ? icalproperty_get_percentcomplete(perc) : 0;
 214         todo->start  = to_date(inst->start);
 215         todo->due    = to_date(icalcomponent_get_due(inst->comp));
 216         return todo;
 217 }
 218
 219 static todo_t *to_todos(icalarray *array)
 220 {
 221         todo_t  list = {};
 222         todo_t *tail = &list;
 223         for (int i = 0; i < array->num_elements; i++) {
 224                  ical_inst *inst = icalarray_element_at(array, i);
 225                  tail->next = to_todo(inst);
 226                  tail = tail->next;
 227         }
 228         return list.next;
 229 }
 230
 231 static void print_todos(todo_t *start)
 232 {
 233         for (todo_t *cur = start; cur; cur = cur->next)
 234                 printf("%04d-%02d-%02d %02d:%02d - %d%% - %s\n",
 235                         cur->due.year, cur->due.month, cur->due.day,
 236                         cur->due.hour, cur->due.min,   cur->status,
 237                         cur->name ?: cur->desc ?: "[no summary]");
 238 }
 239
 240 /* Config parser */
 241 void ical_config(const char *group, const char *name, const char *key, const char *value)
 242 {
 243         ical_t *cal = NULL, *last = NULL;
 244
 245         /* Make sure it's valid */
 246         if (!match(group, "ical") || !name)
 247                 return;
 248
 249         /* Find existing calendar */
 250         for (cal = calendars; cal; last = cal, cal = cal->next)
 251                 if (match(cal->name, name))
 252                         break;
 253
 254         /* Create new calendar */
 255         if (!cal) {
 256                 cal = new0(ical_t);
 257                 cal->name = get_name(name);
 258                 if (last)
 259                         last->next = cal;
 260                 else
 261                         calendars = cal;
 262                 return;
 263         }
 264
 265         /* Set calendar values */
 266         if (match(key, "location"))
 267                 cal->location = get_string(value);
 268         else if (match(key, "username"))
 269                 cal->username = get_string(value);
 270         else if (match(key, "password"))
 271                 cal->password = get_string(value);
 272 }
 273
 274 /* Event functions */
 275 event_t *ical_events(date_t _start, date_t _end)
 276 {
 277         read_icals();
 278
 279         icaltimetype start = to_itime(_start);
 280         icaltimetype end   = to_itime(_end);
 281         icalarray *array = icalarray_new(sizeof(ical_inst), 1);
 282         for (ical_t *cal = calendars; cal; cal = cal->next)
 283                 add_recur(array, cal->ical, start, end, ICAL_VEVENT_COMPONENT);
 284         icalarray_sort(array, ical_compare);
 285         event_t *events = to_events(array);
 286         icalarray_free(array);
 287
 288         return events;
 289 }
 290
 291 /* Todo functions */
 292 todo_t *ical_todos(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(array, cal->ical, start, end, ICAL_VTODO_COMPONENT);
 301         icalarray_sort(array, ical_compare);
 302         todo_t *todos = to_todos(array);
 303         icalarray_free(array);
 304
 305         return todos;
 306 }
 307
 308 /* Test functions */
 309 void ical_printr(icalcomponent *comp, int depth)
 310 {
 311         /* Print component */
 312         icalcomponent_kind kind = icalcomponent_isa(comp);
 313         printf("%*s", depth, "");
 314         printf("%s",  icalcomponent_kind_to_string(kind));
 315         if (kind == ICAL_VEVENT_COMPONENT ||
 316             kind == ICAL_VTODO_COMPONENT)
 317                 printf(" - %s", icalcomponent_get_summary(comp) ?: "[no summary]");
 318         printf("\n");
 319
 320         /* Print children */
 321         icalcomponent_kind find = ICAL_ANY_COMPONENT;
 322         icalcomponent *child = icalcomponent_get_first_component(comp, find);
 323         while (child) {
 324                 ical_printr(child, depth+2);
 325                 child = icalcomponent_get_next_component(comp, find);
 326         }
 327 }
 328
 329 void ical_test(void)
 330 {
 331         /* Load ical */
 332         FILE *file = fopen("data/all.ics", "r");
 333         icalparser *parser = icalparser_new();
 334         icalparser_set_gen_data(parser, file);
 335         icalcomponent *ical = icalparser_parse(parser, (void*)fgets);
 336
 337         /* Misc */
 338         icalarray *array;
 339         icaltimetype start = {.year = 2000};
 340         icaltimetype end   = {.year = 2020};
 341
 342         /* Find events */
 343         array = icalarray_new(sizeof(ical_inst), 1);
 344         add_recur(array, ical, start, end, ICAL_VEVENT_COMPONENT);
 345         icalarray_sort(array, ical_compare);
 346         event_t *events = to_events(array);
 347         icalarray_free(array);
 348
 349         /* Find Todos */
 350         array = icalarray_new(sizeof(ical_inst), 1);
 351         add_recur(array, ical, start, end, ICAL_VTODO_COMPONENT);
 352         icalarray_sort(array, ical_compare);
 353         todo_t *todos = to_todos(array);
 354         icalarray_free(array);
 355
 356         /* Print */
 357         //ical_printr(ical, 0);
 358         //print_events(events);
 359         print_todos(todos);
 360
 361         (void)print_events;
 362         (void)print_todos;
 363         (void)events;
 364         (void)todos;
 365
 366         /* Cleanup */
 367         icalparser_free(parser);
 368 }