show last updated time

generate.js

@@ -4,11 +4,13 @@ const path = require('path');
 const fs = require('fs');
 const parseCsv = require('csv-parse/lib/sync');
 const pug = require('pug');
+const {execSync} = require('child_process');
 
 const publicDir = path.join(__dirname, 'public');
 const templatesDir = path.join(__dirname, 'tmpl');
 const dataDir = path.join(__dirname, 'data');
-const covidDataDir = path.resolve(path.join(__dirname, 'COVID-19', 'csse_covid_19_data'));
+const covidGitDir = path.join(__dirname, 'COVID-19');
+const covidDataDir = path.join(covidGitDir, 'csse_covid_19_data');
 const timeSeriesDir = path.join(covidDataDir, 'csse_covid_19_time_series');
 
 const promiseMe = (fn) => {
@@ -45,6 +47,18 @@ const confirmedUSCsv = path.join(timeSeriesDir, 'time_series_covid19_confirmed_U
 const populationStatesCsv = path.join(dataDir, 'SCPRC-EST2019-18+POP-RES.csv');
 const populationCountriesCsv = path.join(dataDir, 'population-world-wikipedia.tsv');
 
+const lastGlobalDeathsUpdate = execSync(`git -C "${covidGitDir}" log  -n 1 --pretty=format:'%ci' "${deathsGlobalCsv}"`, {
+	encoding: 'utf8',
+});
+const lastUSDeathsUpdate = execSync(`git -C "${covidGitDir}" log -n 1 --pretty=format:'%ci' "${deathsUSCsv}"`, {
+	encoding: 'utf8',
+});
+
+const lastUpdate = new Date(lastGlobalDeathsUpdate > lastUSDeathsUpdate ?
+	lastGlobalDeathsUpdate :
+	lastUSDeathsUpdate
+);
+
 const zeroPad = value => value < 10 ? `0${value}` : value.toString();
 const toSafeName = x => x.replace(/[^A-Za-z]/g, '-').toLowerCase();
 
@@ -519,7 +533,8 @@ const processGlobalDeaths = async () => {
 	const worldTmpl = path.join(templatesDir, 'world.pug');
 	const worldHtml = pug.renderFile(worldTmpl, {
 		data: worldData,
-		$title: 'The World'
+		$title: 'The World',
+		lastUpdate,
 	});
 
 	const targetFile = path.join(publicDir, 'index.html');
@@ -529,31 +544,37 @@ const processGlobalDeaths = async () => {
 
 	const singleCountryTmpl = path.join(templatesDir, 'country.pug');
 	const singleStateTmpl = path.join(templatesDir, 'state.pug');
+
+	const countryFn = pug.compileFile(singleCountryTmpl);
+	const stateFn = pug.compileFile(singleStateTmpl);
+
 	await Promise.all(countryArr.map(async (countryData) => {
 		const start = Date.now();
 		const targetFile = path.join(publicDir, 'countries', countryData.safeName + '.html');
-		const countryHtml = pug.renderFile(singleCountryTmpl, {
+		const countryHtml = countryFn({
 			data: countryData,
 			$title: countryData.name,
+			lastUpdate,
 		});
 		console.log(`writing to ${targetFile}`);
 		await promiseMe(callback => fs.writeFile(targetFile, countryHtml, callback));
 		console.log(`wrote to ${targetFile} in ${Date.now() - start}ms`);
 
 		if (countryData.states.length) {
-			for (const stateData of countryData.states) {
+			await Promise.all(countryData.states.map(async (stateData) => {
 				if (!stateData.name || !stateData.counties || !stateData.counties.length) {
-					continue;
+					return;
 				}
 				const start = Date.now();
 				const targetFile = path.join(publicDir, 'countries', countryData.safeName + '-' + stateData.safeName + '.html');
-				const stateHtml = pug.renderFile(singleStateTmpl, {
+				const stateHtml = stateFn({
 					data: stateData,
 					$title: stateData.name + ' - ' + countryData.name,
+					lastUpdate,
 				});
 				await promiseMe(callback => fs.writeFile(targetFile, stateHtml, callback));
 				console.log(`wrote to ${targetFile} in ${Date.now() - start}ms`);
-			}
+			}));
 		}
 	}));
 

package.json

@@ -11,5 +11,8 @@
 	},
 	"devDependencies": {
 		"serve": "11.3.0"
+	},
+	"scripts": {
+		"start": "node_modules/.bin/serve -n -d -l 9999 public"
 	}
 }

tmpl/master.pug

@@ -146,13 +146,21 @@ html
 							!{JSON.stringify(data.timeSeriesDaily.map(x => x.delta))},
 						);
 
-		div.container
+		div.container.mt-2
-			h1 Covid-19 Data
+			h1.text-center Covid-19 Death Data
-			p.text-muted: em.
+			div.d-flex.justify-content-around.font-italic.small
-				Data from #[a(href="https://github.com/CSSEGISandData/COVID-19") Johns Hopkins CSSE].
+				div
-				This page generated from latest data as of #{new Date().toISOString()}.
+					- const generationDate = new Date().toISOString();
+					| Data from #[a(href="https://github.com/CSSEGISandData/COVID-19") Johns Hopkins CSSE]
+				div
+					| Generated: #[time.generation-date(datetime=generationDate title=generationDate)= generationDate]
+				div
+					- const lastUpdateISO = lastUpdate.toISOString();
+					| Data updated: #[time.update-date(datetime=lastUpdateISO title=lastUpdateISO)= lastUpdateISO]
 
-			div.main-content
+			hr
+
+			div.main-content.mt-4
 				block main
 
 		script.
@@ -255,4 +263,12 @@ html
 				});
 
 				handleHash(window.location.hash);
+
+				const setDate = (selector) => {
+					const node = document.querySelector(selector);
+					node.textContent = new Date(node.getAttribute('datetime')).toLocaleString();
+				};
+
+				setDate('.generation-date');
+				setDate('.update-date');
 			}());