Font Library

bin/fonts/get-google-fonts.js

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+/**
+ * External dependencies
+ */
+const fs = require( 'fs' );
+const crypto = require( 'crypto' );
+
+const API_URL = 'https://www.googleapis.com/webfonts/v1/webfonts?key=';
+const API_KEY = process.env.GOOGLE_FONTS_API_KEY;
+const GOOGLE_FONTS_FILE_PATH =
+	'../../lib/experimental/fonts-library/google-fonts.json';
+
+function getCategories( fonts ) {
+	const categories = new Set();
+	fonts.forEach( ( font ) => {
+		categories.add( font.category );
+	} );
+	// Returs an array of categories
+	return [ ...categories ];
+}
+
+function calculateHash( somestring ) {
+	return crypto
+		.createHash( 'md5' )
+		.update( somestring )
+		.digest( 'hex' )
+		.toString();
+}
+
+// Google Fonts API categories mappping to fallback system fonts
+const GOOGLE_FONT_FALLBACKS = {
+	display: 'system-ui',
+	'sans-serif': 'sans-serif',
+	serif: 'serif',
+	handwriting: 'cursive',
+	monospace: 'monospace',
+};
+
+function getStyleFromGoogleVariant( variant ) {
+	return variant.includes( 'italic' ) ? 'italic' : 'normal';
+}
+
+function getWeightFromGoogleVariant( variant ) {
+	return variant === 'regular' || variant === 'italic'
+		? '400'
+		: variant.replace( 'italic', '' );
+}
+
+function getFallbackForGoogleFont( googleFontCategory ) {
+	return GOOGLE_FONT_FALLBACKS[ googleFontCategory ] || 'system-ui';
+}
+
+function getFontFamilyFromGoogleFont( font ) {
+	return {
+		name: font.family,
+		fontFamily: `${ font.family }, ${ getFallbackForGoogleFont(
+			font.category
+		) }`,
+		slug: 'wp-font-lib-' + font.family.replace( /\s+/g, '-' ).toLowerCase(),
+		category: font.category,
+		fontFace: font.variants.map( ( variant ) => ( {
+			src: font.files?.[ variant ],
+			fontWeight: getWeightFromGoogleVariant( variant ),
+			fontStyle: getStyleFromGoogleVariant( variant ),
+			fontFamily: font.family,
+		} ) ),
+	};
+}
+
+async function updateFiles() {
+	let newApiData;
+	let newData;
+	let response;
+
+	try {
+		newApiData = await fetch( `${ API_URL }${ API_KEY }` );
+		response = await newApiData.json();
+		const fontFamilies = response.items.map( getFontFamilyFromGoogleFont );
+		const categories = getCategories( response.items );
+		newData = { fontFamilies, categories };
+	} catch ( error ) {
+		// TODO: show in UI and remove console statement
+		// eslint-disable-next-line
+		console.error( '❎  Error fetching the Google Fonts API:', error );
+		process.exit( 1 );
+	}
+
+	if ( response.items ) {
+		const newDataString = JSON.stringify( newData, null, 2 );
+
+		const oldFileData = fs.readFileSync( GOOGLE_FONTS_FILE_PATH, 'utf8' );
+		const oldData = JSON.parse( oldFileData );
+		const oldDataString = JSON.stringify( oldData, null, 2 );
+
+		if (
+			calculateHash( newDataString ) !== calculateHash( oldDataString )
+		) {
+			fs.writeFileSync( GOOGLE_FONTS_FILE_PATH, newDataString );
+			// TODO: show in UI and remove console statement
+			// eslint-disable-next-line
+			console.info( '✅  Google Fonts JSON file updated' );
+		} else {
+			// TODO: show in UI and remove console statement
+			// eslint-disable-next-line
+			console.info( 'ℹ️  Google Fonts JSON file is up to date' );
+		}
+	} else {
+		// TODO: show in UI and remove console statement
+		// eslint-disable-next-line
+		console.error(
+			'❎  No new data to check. Check the Google Fonts API key.'
+		);
+		process.exit( 1 );
+	}
+}
+
+updateFiles();