#5308 display age in years months days

[arjunSussol]

Fixes #5308

Change summary

If age below 1 year then it would be shown with months and days e.g. 3 months 23 days.

Testing

Steps to reproduce or otherwise test the changes of this PR:

• Enter dob for a patient in current year
• the age should be shown with months and days
• If dob is more than one year then it will be shown with full number.

Related areas to think about

If there are any general areas of the codebase your changes might have side affects on, mention them here

[raviSussol]

Lgtm. A minor suggestion though.

[raviSussol]

This is working fine but a more simpler form would be:

const calculateAge = dob => {
  if (!dob) return '';
  const ageDuration = moment.duration(moment().diff(dob));
  // If less than a year then `{months} {days}`
  return ageDuration.years() < 1 ? `${ageDuration.months()} months ${ageDuration.days()} days` : `${ageDuration.years()}`;
};

[GaryWilletts]

@arjunSussol this has been approved by PLM Sierra Leone, so needs to be merged now.