added 15 min caching

Author: sagarkarira

lib/api.js

@@ -0,0 +1,17 @@
+const NodeCache = require( "node-cache" );
+const axios = require('axios');
+const myCache = new NodeCache( { stdTTL: 100, checkperiod: 600 } );
+const CORONA_ALL_KEY = 'coronaAll';
+
+exports.getCoronaData = async () => {
+  const coronaCache = myCache.get(CORONA_ALL_KEY);
+  if (coronaCache) {
+    return coronaCache;
+  }
+  const result = await axios('https://coronavirus-tracker-api.herokuapp.com/all');
+  if (!result || !result.data) {
+    throw new Error(`Source API faliure.`);
+  }
+  myCache.set(CORONA_ALL_KEY, result.data, 60 * 15);
+  return result.data;
+}

lib/byCountry.js

@@ -3,6 +3,7 @@ const axios = require('axios');
 const _ = require('lodash');
 const chalk = require('chalk');
 const helpers = require('./helpers');
+const api = require('./api');
 const {
   getCountry,
   getConfirmed,
@@ -62,13 +63,13 @@ function extraStats(dataArr) {
 }
 
 exports.getJSONData = async () => {
-  const result = await axios('https://coronavirus-tracker-api.herokuapp.com/all');
-  return result.data;
+  const data = await api.getCoronaData();
+  return data;
 }
 
 exports.getJSONDataForCountry = async (countryCode) => {
-  const result = await axios('https://coronavirus-tracker-api.herokuapp.com/all');
-  const { latest, confirmed, deaths, recovered } = result.data;
+  const data = await api.getCoronaData();
+  const { latest, confirmed, deaths, recovered } = data;
   const countryData = getDataByState(confirmed, deaths, recovered, countryCode)
     .filter(obj => obj.countryCode === countryCode);
   return countryData;
@@ -96,9 +97,9 @@ exports.getCountryTable = async (countryCode) => {
          , 'left': '║' , 'left-mid': '╟' , 'mid': '─' , 'mid-mid': '┼'
          , 'right': '║' , 'right-mid': '╢' , 'middle': '│' }
   });
-  const result = await axios('https://coronavirus-tracker-api.herokuapp.com/all');
-  const { latest, confirmed, deaths, recovered } = result.data;
-  const countryData = getDataByState(confirmed, deaths, recovered, countryCode)
+  const data = await api.getCoronaData();
+  const { latest, confirmed, deaths, recovered } = data;
+  const countryData = getDataByState(confirmed, deaths, recovered)
     .filter(obj => obj.countryCode === countryCode);
   const totalStats = getTotalStats(countryData);
   table.push({

lib/corona.js

@@ -3,6 +3,7 @@ const axios = require('axios');
 const _ = require('lodash');
 const chalk = require('chalk');
 const helpers = require('./helpers');
+const api = require('./api');
 const {
   getCountry,
   getConfirmed,
@@ -22,8 +23,6 @@ const {
   footer,
 } = require('./helpers');
 
-
-
 function getDataByCountry(confirmed, deaths, recovered) {
   const countryMap = {};
   const confirmedMap = _.keyBy(confirmed.locations, (i) => i.country + i.province);
@@ -100,8 +99,8 @@ exports.getCompleteTable = async () => {
          , 'left': '║' , 'left-mid': '╟' , 'mid': '─' , 'mid-mid': '┼'
          , 'right': '║' , 'right-mid': '╢' , 'middle': '│' }
   });
-  const result = await axios('https://coronavirus-tracker-api.herokuapp.com/all');
-  const { latest, confirmed, deaths, recovered } = result.data;
+  const data = await api.getCoronaData();
+  const { latest, confirmed, deaths, recovered } = data;
   const countryData = getDataByCountry(confirmed, deaths, recovered)
   const worldStats = getTotalStats(countryData);
   table.push({

lib/helpers.js

@@ -147,6 +147,8 @@ e.getTotalStats = (countryData) => {
 
 e.footer = `
 
-Source Code: https://github.com/sagarkarira/coronavirus-tracker-cli/
+Stay safe everyone.
+
+Code: https://github.com/sagarkarira/coronavirus-tracker-cli/
 Twitter: http://twitter.com/ekrysis
 `;

package-lock.json

@@ -26,7 +26,8 @@
     "express": "^4.17.1",
     "humanize-number": "0.0.2",
     "lodash": "^4.17.15",
-    "moment": "^2.24.0"
+    "moment": "^2.24.0",
+    "node-cache": "^5.1.0"
   },
   "devDependencies": {
     "nodemon": "^2.0.2"