 
 GENERIC: elapsed-time ( seconds -- string )
 
-M: real elapsed-time
+M: integer elapsed-time
     dup 0 < [ "negative seconds" throw ] when [
         {
             { 60 "s" }

        ] each drop
    ] { } make [ "0s" ] [ reverse " " join ] if-empty ;

M: duration elapsed-time
    duration>seconds elapsed-time ;

! XXX: Anything up to 2 hours is "about an hour"
: relative-time-offset ( seconds -- string )

        { [ dup 1 < ] [ drop "just now" ] }
        { [ dup 60 < ] [ drop "less than a minute" ] }
        { [ dup 120 < ] [ drop "about a minute" ] }
        { [ dup 2700 < ] [ 60 /i "%d minutes" sprintf ] }
        { [ dup 7200 < ] [ drop "about an hour" ] }
        { [ dup 86400 < ] [ 3600 /i "%d hours" sprintf ] }
        { [ dup 172800 < ] [ drop "1 day" ] }
        [ 86400 /i "%d days" sprintf ]
    } cond ;

GENERIC: relative-time ( seconds -- string )
