load the events

2 files changed, 103 insertions, 1 deletions

diff --git a/.gitignore b/.gitignore
index 4c3ad24..f9c165e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
 *.swp
 /check_ical
 /check_ical_out.txt
+/events.ical
 /opplysning
 core
diff --git a/opplysning.c b/opplysning.c
index ab87995..163db47 100644
--- a/opplysning.c
+++ b/opplysning.c
@@ -1,5 +1,6 @@
 #define _POSIX_C_SOURCE 199309L
 
+#include <err.h>
 #include <signal.h>
 #include <stdint.h>
 #include <stdio.h>
@@ -7,8 +8,101 @@
 #include <string.h>
 #include <time.h>
 
+#include <libical/ical.h>
 #include <raylib.h>
 
+// Unfortunately, 0 = Sunday.
+int
+weekday(int year, int month, int day)
+{
+	struct tm tm = {
+	    .tm_year = year - 1900,
+	    .tm_mon = month - 1,
+	    .tm_mday = day,
+	};
+	mktime(&tm);
+	return tm.tm_wday;
+}
+
+const char *maaned[] = {
+    "",	    "JANUAR", "FEBRUAR",   "MARS",    "APRIL",	  "MAI",      "JUNI",
+    "JULI", "AUGUST", "SEPTEMBER", "OKTOBER", "NOVEMBER", "DESEMBER",
+};
+const char *ukedag[] = {
+    "SØNDAG", "MANDAG", "TIRSDAG", "ONSDAG", "TORSDAG", "FREDAG", "LØRDAG",
+};
+
+enum {
+	MAX_EVENTS = 64,
+	SIZEOF_TITLE = 256,
+};
+struct event {
+	uint32_t year;
+	uint32_t month;
+	uint32_t day;
+	uint32_t wday;
+	uint32_t hour;
+	uint32_t minute;
+	char title[SIZEOF_TITLE];
+};
+struct event the_events[MAX_EVENTS];
+int num_events;
+char *
+read_stream(char *s, size_t size, void *d)
+{
+	return fgets(s, (int)size, (FILE *)d);
+}
+void
+load_the_events(void)
+{
+	icalparser *p = icalparser_new();
+	assert(p);
+
+	FILE *f = fopen("events.ical", "r");
+	assert(f);
+
+	icalparser_set_gen_data(p, f);
+	for (;;) {
+		char *line = icalparser_get_line(p, read_stream);
+		if (!line) {
+			break;
+		}
+
+		icalcomponent *comp = icalparser_add_line(p, line);
+		if (!comp) {
+			continue;
+		}
+
+		for (icalcompiter i = icalcomponent_begin_component(
+			 comp, ICAL_VEVENT_COMPONENT);
+		     icalcompiter_deref(&i); icalcompiter_next(&i)) {
+			if (MAX_EVENTS <= num_events) {
+				warnx("MAX_EVENTS exceeded at %u", num_events);
+				break;
+			}
+			icalcomponent *c = icalcompiter_deref(&i);
+
+			struct icaltimetype dts = icalcomponent_get_dtstart(c);
+			const char *sum = icalcomponent_get_summary(c);
+
+			the_events[num_events].year = dts.year;
+			the_events[num_events].month = dts.month;
+			the_events[num_events].day = dts.day;
+			the_events[num_events].hour = dts.hour;
+			the_events[num_events].minute = dts.minute;
+			strncpy(the_events[num_events].title, sum,
+				SIZEOF_TITLE);
+			the_events[num_events].wday =
+			    weekday(dts.year, dts.month, dts.day);
+			++num_events;
+		}
+
+		icalcomponent_free(comp);
+	}
+
+	icalparser_free(p);
+}
+
 const char *the_alphabet = "0123456789"
 			   "ABCDEFGHIJKLMNOPQRSTUVWXYZÆØÅ"
 			   "abcdefghijklmnopqrstuvwxyzæøå"
@@ -23,6 +117,13 @@ line(int x, int y, Font f, Color c, char *s)
 int
 main(void)
 {
+	load_the_events();
+	for (int i = 0; i < num_events; ++i) {
+		struct event *e = the_events + i;
+		printf("\t%2d %s %u. %s %02u:%02u %s\n", i, ukedag[e->wday],
+		       e->day, maaned[e->month], e->hour, e->minute, e->title);
+	}
+
 	const int sw = 1920;
 	const int sh = 1080;
 
@@ -49,7 +150,7 @@ main(void)
 
 		BeginDrawing();
 		ClearBackground(bg);
-		// DrawFPS(1920-100, 20);
+		// DrawFPS(1920 - 100, 20);
 		int y = 0;
 		line(sw / 2 - 60, 0, font_h, fg, ts);
 		line(20, y += 60, font_h, hd, "FREDAG 18. APRIL");