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 "date.h"
  27 #include "cal.h"
  28
  29 /* Local types */
  30 typedef struct {
  31         icalcomponent *comp;
  32         struct icaltimetype start;
  33         struct icaltimetype end;
  34 } ical_inst;
  35
  36 typedef struct ical_t {
  37         char          *name;
  38         char          *location;
  39         char          *username;
  40         char          *password;
  41         icalcomponent *ical;
  42         struct ical_t *next;
  43 } ical_t;
  44
  45 /* Static data */
  46 static ical_t  calendars[] = {
  47         { .location = "data/all.ics" },
  48 };
  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(icalarray *array, icalcomponent *comp,
  84                 icaltimetype start, icaltimetype end,
  85                 icalcomponent_kind which)
  86 {
  87         icalcomponent_kind kind = icalcomponent_isa(comp);
  88
  89         if (kind == which) {
  90                 /* Get recurrence data */
  91                 struct icaltimetype cstart, cend; // Component times
  92                 struct icaltimetype istart, iend; // Instance times
  93                 struct icaldurationtype length;   // Duration
  94
  95                 icalproperty             *rrule;
  96                 struct icalrecurrencetype recur;
  97                 icalrecur_iterator       *iter;
  98
  99                 cstart = icalcomponent_get_dtstart(comp);
 100                 cend   = icalcomponent_get_dtend(comp);
 101                 length = icaltime_subtract(cend, cstart);
 102
 103                 rrule  = icalcomponent_get_first_property(comp, ICAL_RRULE_PROPERTY);
 104                 recur  = icalproperty_get_rrule(rrule);
 105                 iter   = icalrecur_iterator_new(recur, cstart);
 106
 107                 /* Add recurrences */
 108                 if (icaltime_is_null_time(cstart) ||
 109                     which == ICAL_VTODO_COMPONENT) {
 110                         icalarray_append(array, &(ical_inst){
 111                                 .comp  = comp,
 112                                 .start = cstart,
 113                                 .end   = cend,
 114                         });
 115                 } else while (1) {
 116                         istart = iend = icalrecur_iterator_next(iter);
 117                         if (icaltime_is_null_time(istart))
 118                                 break;    // no more instances
 119                         if (!icaltime_is_null_time(cend))
 120                                 iend = icaltime_add(iend, length);
 121
 122                         if (icaltime_compare(iend, start) <= 0)
 123                                 continue; // instance ends before start time
 124                         if (icaltime_compare(istart, end) >= 0)
 125                                 break;    // instance begins after stop time
 126
 127                         icalarray_append(array, &(ical_inst){
 128                                 .comp  = comp,
 129                                 .start = istart,
 130                                 .end   = iend,
 131                         });
 132                 }
 133
 134                 icalrecur_iterator_free(iter);
 135         }
 136
 137         /* Add children */
 138         icalcomponent_kind find = ICAL_ANY_COMPONENT;
 139         icalcomponent *child = icalcomponent_get_first_component(comp, find);
 140         while (child) {
 141                 add_recur(array, child, start, end, which);
 142                 child = icalcomponent_get_next_component(comp, find);
 143         }
 144 }
 145
 146 static void read_icals(void)
 147 {
 148         for (ical_t *cal = calendars; cal; cal = cal->next) {
 149                 if (cal->ical == NULL && cal->location) {
 150                         wordexp_t wexp;
 151                         wordexp(cal->location, &wexp, WRDE_NOCMD);
 152                         if (wexp.we_wordc == 0)
 153                                 continue;
 154                         FILE *file = fopen(wexp.we_wordv[0], "r");
 155                         wordfree(&wexp);
 156                         if (!file)
 157                                 continue;
 158
 159                         icalparser *parser = icalparser_new();
 160                         icalparser_set_gen_data(parser, file);
 161                         cal->ical = icalparser_parse(parser, (void*)fgets);
 162                         icalparser_free(parser);
 163                 }
 164         }
 165 }
 166
 167 /* Event functions */
 168 static event_t *to_event(ical_inst *inst)
 169 {
 170         icalproperty *prop = icalcomponent_get_first_property(inst->comp, ICAL_CATEGORIES_PROPERTY);
 171
 172         event_t *event = new0(event_t);
 173         event->name  = strcopy(icalcomponent_get_summary(inst->comp));
 174         event->desc  = strcopy(icalcomponent_get_description(inst->comp));
 175         event->loc   = strcopy(icalcomponent_get_location(inst->comp));
 176         event->cat   = icalproperty_get_value_as_string_r(prop);
 177         event->start = to_date(inst->start);
 178         event->end   = to_date(inst->end);
 179         return event;
 180 }
 181
 182 static event_t *to_events(icalarray *array)
 183 {
 184         event_t  list = {};
 185         event_t *tail = &list;
 186         for (int i = 0; i < array->num_elements; i++) {
 187                  ical_inst *inst = icalarray_element_at(array, i);
 188                  tail->next = to_event(inst);
 189                  tail = tail->next;
 190         }
 191         return list.next;
 192 }
 193
 194 static void print_events(event_t *start)
 195 {
 196         for (event_t *cur = start; cur; cur = cur->next)
 197                 printf("%04d-%02d-%02d %02d:%02d - %s\n",
 198                         cur->start.year, cur->start.month, cur->start.day,
 199                         cur->start.hour, cur->start.min,
 200                         cur->name ?: cur->desc ?: "[no summary]");
 201 }
 202
 203 /* Todo functions */
 204 static todo_t *to_todo(ical_inst *inst)
 205 {
 206         icalproperty *cat  = icalcomponent_get_first_property(inst->comp, ICAL_CATEGORIES_PROPERTY);
 207         icalproperty *perc = icalcomponent_get_first_property(inst->comp, ICAL_PERCENTCOMPLETE_PROPERTY);
 208
 209         todo_t *todo = new0(todo_t);
 210         todo->name   = strcopy(icalcomponent_get_summary(inst->comp));
 211         todo->desc   = strcopy(icalcomponent_get_description(inst->comp));
 212         todo->cat    = strcopy(icalproperty_get_value_as_string(cat));
 213         todo->status = icalcomponent_get_status(inst->comp) == ICAL_STATUS_COMPLETED ? 100 :
 214                        perc ? icalproperty_get_percentcomplete(perc) : 0;
 215         todo->start  = to_date(inst->start);
 216         todo->due    = to_date(icalcomponent_get_due(inst->comp));
 217         return todo;
 218 }
 219
 220 static todo_t *to_todos(icalarray *array)
 221 {
 222         todo_t  list = {};
 223         todo_t *tail = &list;
 224         for (int i = 0; i < array->num_elements; i++) {
 225                  ical_inst *inst = icalarray_element_at(array, i);
 226                  tail->next = to_todo(inst);
 227                  tail = tail->next;
 228         }
 229         return list.next;
 230 }
 231
 232 static void print_todos(todo_t *start)
 233 {
 234         for (todo_t *cur = start; cur; cur = cur->next)
 235                 printf("%04d-%02d-%02d %02d:%02d - %d%% - %s\n",
 236                         cur->due.year, cur->due.month, cur->due.day,
 237                         cur->due.hour, cur->due.min,   cur->status,
 238                         cur->name ?: cur->desc ?: "[no summary]");
 239 }
 240
 241 /* Event functions */
 242 event_t *ical_events(date_t _start, date_t _end)
 243 {
 244         read_icals();
 245
 246         icaltimetype start = to_itime(_start);
 247         icaltimetype end   = to_itime(_end);
 248         icalarray *array = icalarray_new(sizeof(ical_inst), 1);
 249         for (ical_t *cal = calendars; cal; cal = cal->next)
 250                 add_recur(array, cal->ical, start, end, ICAL_VEVENT_COMPONENT);
 251         icalarray_sort(array, ical_compare);
 252         event_t *events = to_events(array);
 253         icalarray_free(array);
 254
 255         return events;
 256 }
 257
 258 /* Todo functions */
 259 todo_t *ical_todos(date_t _start, date_t _end)
 260 {
 261         read_icals();
 262
 263         icaltimetype start = to_itime(_start);
 264         icaltimetype end   = to_itime(_end);
 265         icalarray *array = icalarray_new(sizeof(ical_inst), 1);
 266         for (ical_t *cal = calendars; cal; cal = cal->next)
 267                 add_recur(array, cal->ical, start, end, ICAL_VTODO_COMPONENT);
 268         icalarray_sort(array, ical_compare);
 269         todo_t *todos = to_todos(array);
 270         icalarray_free(array);
 271
 272         return todos;
 273 }
 274
 275 /* Test functions */
 276 void ical_printr(icalcomponent *comp, int depth)
 277 {
 278         /* Print component */
 279         icalcomponent_kind kind = icalcomponent_isa(comp);
 280         printf("%*s", depth, "");
 281         printf("%s",  icalcomponent_kind_to_string(kind));
 282         if (kind == ICAL_VEVENT_COMPONENT ||
 283             kind == ICAL_VTODO_COMPONENT)
 284                 printf(" - %s", icalcomponent_get_summary(comp) ?: "[no summary]");
 285         printf("\n");
 286
 287         /* Print children */
 288         icalcomponent_kind find = ICAL_ANY_COMPONENT;
 289         icalcomponent *child = icalcomponent_get_first_component(comp, find);
 290         while (child) {
 291                 ical_printr(child, depth+2);
 292                 child = icalcomponent_get_next_component(comp, find);
 293         }
 294 }
 295
 296 void ical_test(void)
 297 {
 298         /* Load ical */
 299         FILE *file = fopen("data/all.ics", "r");
 300         icalparser *parser = icalparser_new();
 301         icalparser_set_gen_data(parser, file);
 302         icalcomponent *ical = icalparser_parse(parser, (void*)fgets);
 303
 304         /* Misc */
 305         icalarray *array;
 306         icaltimetype start = {.year = 2000};
 307         icaltimetype end   = {.year = 2020};
 308
 309         /* Find events */
 310         array = icalarray_new(sizeof(ical_inst), 1);
 311         add_recur(array, ical, start, end, ICAL_VEVENT_COMPONENT);
 312         icalarray_sort(array, ical_compare);
 313         event_t *events = to_events(array);
 314         icalarray_free(array);
 315
 316         /* Find Todos */
 317         array = icalarray_new(sizeof(ical_inst), 1);
 318         add_recur(array, ical, start, end, ICAL_VTODO_COMPONENT);
 319         icalarray_sort(array, ical_compare);
 320         todo_t *todos = to_todos(array);
 321         icalarray_free(array);
 322
 323         /* Print */
 324         //ical_printr(ical, 0);
 325         //print_events(events);
 326         print_todos(todos);
 327
 328         (void)print_events;
 329         (void)print_todos;
 330         (void)events;
 331         (void)todos;
 332
 333         /* Cleanup */
 334         icalparser_free(parser);
 335 }