Write a function which formats a duration, given as a number of seconds, in a human-friendly way.
The function must accept a non-negative integer. If it is zero, it just returns "now"
. Otherwise, the duration is expressed as a combination of years
, days
, hours
, minutes
and seconds
.
Example :
* Input = 62, Output = "1 minute and 2 seconds"
* Input = 3662, Output = "1 hour, 1 minute and 2 seconds"
Assume, a year is always 365 days and a day is 24 hours.
Note that spaces are important.
-
The resulting expression is made of components like
4 seconds
,1 year
, etc.- In general, a positive integer and one of the valid units of time, separated by a space.
- The unit of time is used in plural if the integer is greater than 1.
-
The components are separated by a comma and a space (
", "
). Except the last component, which is separated by" and "
, just like it would be written in English. -
A more significant units of time will occur before than a least significant one. Therefore,
1 second and 1 year
is not correct, but1 year and 1 second
is. -
Different components have different unit of times. So there is not repeated units like in
5 seconds and 1 second
. -
A component will not appear at all if its value happens to be zero. Hence,
1 minute and 0 seconds
is not valid, but it should be just1 minute
. -
A unit of time must be used "as much as possible". It means that the function should not return
61 seconds
, but1 minute and 1 second
instead. Formally, the duration specified by of a component must not be greater than any valid more significant unit of time.