Adding country name filtering on cli command

Author: CyberDracula

lib/corona.js

@@ -28,6 +28,8 @@ function getDataByCountry(confirmed, deaths, recovered) {
   const confirmedMap = _.keyBy(confirmed.locations, (i) => i.country + i.province);
   const recoveredMap = _.keyBy(recovered.locations, (i) => i.country + i.province);
   const deathsMap = _.keyBy(deaths.locations, (i) => i.country + i.province);
+  const countryName = process.argv[2].toLowerCase();
+
   confirmed.locations.forEach(obj => {
     const countryName = obj.country;
     const provinceName = obj.province;
@@ -64,7 +66,9 @@ function getDataByCountry(confirmed, deaths, recovered) {
   const countryArr = extraStats(
     Object.keys(countryMap).map(key => countryMap[key])
   );
-  return _.sortBy(countryArr, (o) => -o.confirmed)
+  const countryData = (countryName) ? countryArr.filter(obj =>  obj.country.toLowerCase() === countryName) : _.sortBy(countryArr, (o) => -o.confirmed);
+
+  return countryData;
 }
 
 function extraStats(dataArr) {