98 lines
3.8 KiB
JavaScript
98 lines
3.8 KiB
JavaScript
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const _ = require('lodash');
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const {getImageWithSize} = require('../utils/images');
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const config = require('../../shared/config');
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const imageSizeCache = require('../../server/lib/image').cachedImageSizeFromUrl;
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/**
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* Get Image dimensions
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* @param {object} metaData
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* @returns {Promise<object>} metaData
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* @description for image properties in meta data (coverImage, authorImage and site.logo), `getCachedImageSizeFromUrl` is
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* called to receive image width and height
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*/
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async function getImageDimensions(metaData) {
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const MAX_SOCIAL_IMG_WIDTH = config.get('imageOptimization:internalImageSizes:social-image:width') || 1200;
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const fetch = {
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coverImage: imageSizeCache.getCachedImageSizeFromUrl(metaData.coverImage.url),
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authorImage: imageSizeCache.getCachedImageSizeFromUrl(metaData.authorImage.url),
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ogImage: imageSizeCache.getCachedImageSizeFromUrl(metaData.ogImage.url),
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twitterImage: imageSizeCache.getCachedImageSizeFromUrl(metaData.twitterImage),
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logo: imageSizeCache.getCachedImageSizeFromUrl(metaData.site.logo.url)
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};
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const [coverImage, authorImage, ogImage, twitterImage, logo] = await Promise.all([
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fetch.coverImage,
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fetch.authorImage,
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fetch.ogImage,
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fetch.twitterImage,
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fetch.logo
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]);
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const imageObj = {
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coverImage,
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authorImage,
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ogImage,
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twitterImage,
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logo
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};
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_.forEach(imageObj, function (key, value) {
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if (_.has(key, 'width') && _.has(key, 'height')) {
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// We have some restrictions for publisher.logo:
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// The image needs to be <=600px wide and <=60px high (ideally exactly 600px x 60px).
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// Unless we have proper image-handling (see https://github.com/TryGhost/Ghost/issues/4453),
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// we will fake it in some cases or not produce an imageObject at all.
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if (value === 'logo') {
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if (key.height <= 60 && key.width <= 600) {
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_.assign(metaData.site[value], {
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dimensions: {
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width: key.width,
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height: key.height
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}
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});
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} else if (key.width === key.height) {
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// CASE: the logo is too large, but it is a square. We fake it...
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_.assign(metaData.site[value], {
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dimensions: {
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width: 60,
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height: 60
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}
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});
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}
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} else {
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if (key.width > MAX_SOCIAL_IMG_WIDTH) {
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const ratio = key.height / key.width;
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key.width = MAX_SOCIAL_IMG_WIDTH;
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key.height = Math.round(MAX_SOCIAL_IMG_WIDTH * ratio);
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const sizeOptions = {
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requestedSize: `social-image`,
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imageSizes: config.get('imageOptimization:internalImageSizes')
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};
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if (typeof metaData[value] === 'string') {
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const url = getImageWithSize(metaData[value], sizeOptions);
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metaData[value] = url;
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} else {
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const url = getImageWithSize(metaData[value].url, sizeOptions);
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_.assign(metaData[value], {url});
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}
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}
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if (typeof metaData[value] === 'object') {
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_.assign(metaData[value], {
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dimensions: {
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width: key.width,
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height: key.height
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}
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});
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}
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}
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}
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});
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return metaData;
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}
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module.exports = getImageDimensions;
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