* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+#include <stdlib.h>
+
#include "util.h"
#include "date.h"
#include "cal.h"
+/* Macros */
+#define CAL(name) \
+ event_t *name##_events(date_t start, date_t end); \
+ todo_t *name##_todos(date_t start, date_t end)
+
+/* Prototypes */
+CAL(dummy);
+CAL(ical);
+
/* Global data */
event_t *EVENTS;
todo_t *TODOS;
+/* Local data */
+static date_t start;
+static date_t end;
+
+/* Merge events and todos */
+static void add_event(event_t **first, event_t **last, event_t **next)
+{
+ if (*last)
+ (*last)->next = *next;
+ else
+ (*first) = *next;
+ (*last) = (*next);
+ (*next) = (*next)->next;
+}
+
+static void add_todo(todo_t **first, todo_t **last, todo_t **next)
+{
+ if (*last)
+ (*last)->next = *next;
+ else
+ (*first) = *next;
+ (*last) = (*next);
+ (*next) = (*next)->next;
+}
+
+static event_t *merge_events(event_t *a, event_t *b)
+{
+ event_t *first = NULL, *last = NULL;
+ while (a && b)
+ if (compare(&a->start, &b->start) <= 0)
+ add_event(&first, &last, &a);
+ else
+ add_event(&first, &last, &b);
+ while (a) add_event(&first, &last, &a);
+ while (b) add_event(&first, &last, &b);
+ return first;
+}
+
+static todo_t *merge_todos(todo_t *a, todo_t *b)
+{
+ todo_t *first = NULL, *last = NULL;
+ while (a && b)
+ if (compare(&a->start, &b->start) <= 0)
+ add_todo(&first, &last, &a);
+ else
+ add_todo(&first, &last, &b);
+ while (a) add_todo(&first, &last, &a);
+ while (b) add_todo(&first, &last, &b);
+ return first;
+}
+
/* Initialize */
void cal_init(void)
{
- EVENTS = cal_events(2012, JAN, 0, 366);
- TODOS = cal_todos(2012, JAN, 0, 366);
+ /* Load a year's worth of data */
+ cal_load(YEAR-1, DEC, 31-7, 366+7+7);
/* Debug */
for (event_t *e = EVENTS; e; e = e->next)
e->start.hour, e->start.min, e->name, e->desc);
}
-/* Get events */
-event_t *cal_events(year_t year, month_t month, day_t day, int days)
+/* Load events and todos */
+void cal_load(year_t year, month_t month, day_t day, int days)
{
- return ical_events(0, year, month, day, days)
- ?: dummy_events(0, year, month, day, days);
-}
+ year_t eyear = year;
+ month_t emonth = month;
+ day_t eday = day;
+ add_days(&eyear, &emonth, &eday, days);
+
+ /* Skip if we already loaded enough info */
+ if (!before(&start, year, month, day, 0, 0) &&
+ before(&end, eyear, emonth, eday, 24, 0))
+ return;
+
+ /* Free uneeded data */
+ for (event_t *next, *cur = EVENTS; cur; cur = next) {
+ next = cur->next;
+ if (cur->name) free(cur->name);
+ if (cur->desc) free(cur->desc);
+ if (cur->loc) free(cur->loc);
+ if (cur->cat) free(cur->cat);
+ free(cur);
+ }
+ for (todo_t *next, *cur = TODOS; cur; cur = next) {
+ next = cur->next;
+ if (cur->name) free(cur->name);
+ if (cur->desc) free(cur->desc);
+ if (cur->cat) free(cur->cat);
+ free(cur);
+ }
+
+ /* Push dates out a bit to avoid reloading,
+ * enough to at least cover the current year */
+ add_days(&year, &month, &day, -366);
+ add_days(&eyear, &emonth, &eday, 366);
+ start = (date_t){year, month, day};
+ end = (date_t){eyear, emonth, eday};
+
+ /* Load events */
+ EVENTS = merge_events(
+ dummy_events(start, end),
+ ical_events(start, end));
+
+ /* Load todos */
+ TODOS = merge_todos(
+ dummy_todos(start, end),
+ ical_todos(start, end));
-/* Get todos */
-todo_t *cal_todos(year_t year, month_t month, day_t day, int days)
-{
- return ical_todos(0, year, month, day, days)
- ?: dummy_todos(0, year, month, day, days);
}