{ "1m 1s" } [ 61 elapsed-time ] unit-test
{ "2y 1w 6d 2h 59m 23s" } [ 64033163 elapsed-time ] unit-test
-[ -1 relative-time ] [ "negative seconds" = ] must-fail-with
-
{ "just now" } [ 0 relative-time ] unit-test
{ "less than a minute ago" } [ 10 relative-time ] unit-test
{ "about a minute ago" } [ 60 relative-time ] unit-test
M: duration elapsed-time
duration>seconds elapsed-time ;
+! XXX: Anything up to 2 hours is "about an hour"
+: relative-time-offset ( seconds -- string )
+ abs {
+ { [ dup 1 < ] [ drop "just now" ] }
+ { [ dup 60 < ] [ drop "less than a minute" ] }
+ { [ dup 120 < ] [ drop "about a minute" ] }
+ { [ dup 2700 < ] [ 60 / "%d minutes" sprintf ] }
+ { [ dup 7200 < ] [ drop "about an hour" ] }
+ { [ dup 86400 < ] [ 3600 /i "%d hours" sprintf ] }
+ { [ dup 172800 < ] [ drop "1 day" ] }
+ [ 86400 / "%d days" sprintf ]
+ } cond ;
+
GENERIC: relative-time ( seconds -- string )
M: real relative-time
- dup 0 < [ "negative seconds" throw ] when {
- { [ dup 1 < ] [ drop "just now" ] }
- { [ dup 60 < ] [ drop "less than a minute ago" ] }
- { [ dup 120 < ] [ drop "about a minute ago" ] }
- { [ dup 2700 < ] [ 60 / "%d minutes ago" sprintf ] }
- { [ dup 5400 < ] [ drop "about an hour ago" ] }
- { [ dup 86400 < ] [ 3600 / "%d hours ago" sprintf ] }
- { [ dup 172800 < ] [ drop "1 day ago" ] }
- [ 86400 / "%d days ago" sprintf ]
- } cond ;
+ [ relative-time-offset ] [
+ dup abs 1 < [
+ drop
+ ] [
+ 0 < "hence" "ago" ? " " glue
+ ] if
+ ] bi ;
M: duration relative-time
duration>seconds relative-time ;
M: timestamp relative-time
now swap time- relative-time ;
+
+
+GENERIC: unix-time>relative-time ( unix-seconds -- string )
+
+M: real unix-time>relative-time
+ seconds since-1970 unix-time>relative-time ;
+
+M: timestamp unix-time>relative-time
+ [ now ] dip
+ time- duration>seconds relative-time ;