+/* Format a nice representation of 'time' relative to the current time.
+ *
+ * Examples include:
+ *
+ * 5 minutes ago (For times less than 60 minutes ago)
+ * 12:30 (For times >60 minutes but still today)
+ * Yesterday
+ * Monday (Before yesterday but fewer than 7 days ago)
+ * Oct. 12 (Between 7 and 180 days ago (about 6 months))
+ * 2008-06-30 (More than 180 days ago)
+ */
+#define MINUTE (60)
+#define HOUR (60 * MINUTE)
+#define DAY (24 * HOUR)
+#define RELATIVE_DATE_MAX 20
+static const char *
+_format_relative_date (void *ctx, time_t then)
+{
+ struct tm tm_now, tm_then;
+ time_t now = time(NULL);
+ time_t delta;
+ char *result;
+
+ localtime_r (&now, &tm_now);
+ localtime_r (&then, &tm_then);
+
+ result = talloc_zero_size (ctx, RELATIVE_DATE_MAX);
+ if (result == NULL)
+ return "when?";
+
+ if (then > now)
+ return "the future";
+
+ delta = now - then;
+
+ if (delta > 180 * DAY) {
+ strftime (result, RELATIVE_DATE_MAX,
+ "%F", &tm_then); /* 2008-06-30 */
+ return result;
+ }
+
+ if (delta < 3600) {
+ snprintf (result, RELATIVE_DATE_MAX,
+ "%d minutes ago", (int) (delta / 60));
+ return result;
+ }
+
+ if (delta <= 7 * DAY) {
+ if (tm_then.tm_wday == tm_now.tm_wday &&
+ delta < DAY)
+ {
+ strftime (result, RELATIVE_DATE_MAX,
+ "%R", &tm_then); /* 12:30 */
+ return result;
+ } else if ((tm_now.tm_wday + 7 - tm_then.tm_wday) % 7 == 1) {
+ return "Yesterday";
+ } else {
+ if (tm_then.tm_wday != tm_now.tm_wday) {
+ strftime (result, RELATIVE_DATE_MAX,
+ "%A", &tm_then); /* Monday */
+ return result;
+ }
+ }
+ }
+
+ strftime (result, RELATIVE_DATE_MAX,
+ "%b %d", &tm_then); /* Oct. 12 */
+ return result;
+}
+#undef MINUTE
+#undef HOUR
+#undef DAY
+