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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.fallback = void 0;
const chardet_1 = require("chardet");
const utils_1 = require("./utils");
const doesElementExist = (selector, attribute, $) => ($(selector).attr(attribute) && $(selector).attr(attribute).length > 0);
/**
* ogs fallbacks
*
* @param {object} ogObject - the current ogObject
* @param {object} options - options for ogs
* @param {object} $ - cheerio.load() of the current html
* @return {object} object with ogs results with updated fallback values
*
*/
function fallback(ogObject, options, $, rawBody) {
// title fallback
if (!ogObject.ogTitle) {
if ($('title').text() && $('title').text().length > 0) {
ogObject.ogTitle = $('title').first().text();
}
else if ($('head > meta[name="title"]').attr('content') && $('head > meta[name="title"]').attr('content').length > 0) {
ogObject.ogTitle = $('head > meta[name="title"]').attr('content');
}
else if ($('.post-title').text() && $('.post-title').text().length > 0) {
ogObject.ogTitle = $('.post-title').text();
}
else if ($('.entry-title').text() && $('.entry-title').text().length > 0) {
ogObject.ogTitle = $('.entry-title').text();
}
else if ($('h1[class*="title" i] a').text() && $('h1[class*="title" i] a').text().length > 0) {
ogObject.ogTitle = $('h1[class*="title" i] a').text();
}
else if ($('h1[class*="title" i]').text() && $('h1[class*="title" i]').text().length > 0) {
ogObject.ogTitle = $('h1[class*="title" i]').text();
}
}
// Get meta description tag if og description was not provided
if (!ogObject.ogDescription) {
if (doesElementExist('head > meta[name="description"]', 'content', $)) {
ogObject.ogDescription = $('head > meta[name="description"]').attr('content');
}
else if (doesElementExist('head > meta[itemprop="description"]', 'content', $)) {
ogObject.ogDescription = $('head > meta[itemprop="description"]').attr('content');
}
else if ($('#description').text() && $('#description').text().length > 0) {
ogObject.ogDescription = $('#description').text();
}
}
// Get all of images if there is no og:image info
if (!ogObject.ogImage && options.ogImageFallback) {
ogObject.ogImage = [];
$('img').map((index, imageElement) => {
if (doesElementExist(imageElement, 'src', $)) {
const source = $(imageElement).attr('src');
const type = (0, utils_1.findImageTypeFromUrl)(source);
if (!(0, utils_1.isUrlValid)(source, options.urlValidatorSettings) || !(0, utils_1.isImageTypeValid)(type))
return false;
ogObject.ogImage.push({
url: source,
width: $(imageElement).attr('width') || null,
height: $(imageElement).attr('height') || null,
type,
});
}
return false;
});
if (ogObject.ogImage.length === 0)
delete ogObject.ogImage;
}
else if (ogObject.ogImage) {
// if there isn't a type, try to pull it from the URL
if (Array.isArray(ogObject.ogImage)) {
ogObject.ogImage.map((image) => {
if (image.url && !image.type) {
const type = (0, utils_1.findImageTypeFromUrl)(image.url);
if ((0, utils_1.isImageTypeValid)(type))
image.type = type;
}
return false;
});
}
else if (ogObject.ogImage.url && !ogObject.ogImage.type) {
const type = (0, utils_1.findImageTypeFromUrl)(ogObject.ogImage.url);
if ((0, utils_1.isImageTypeValid)(type))
ogObject.ogImage.type = type;
}
}
// audio fallback
if (!ogObject.ogAudioURL && !ogObject.ogAudioSecureURL) {
const audioElementValue = $('audio').attr('src');
const audioSourceElementValue = $('audio > source').attr('src');
if (doesElementExist('audio', 'src', $)) {
if (audioElementValue.startsWith('https')) {
ogObject.ogAudioSecureURL = audioElementValue;
}
else {
ogObject.ogAudioURL = audioElementValue;
}
const audioElementTypeValue = $('audio').attr('type');
if (!ogObject.ogAudioType && doesElementExist('audio', 'type', $))
ogObject.ogAudioType = audioElementTypeValue;
}
else if (doesElementExist('audio > source', 'src', $)) {
if (audioSourceElementValue.startsWith('https')) {
ogObject.ogAudioSecureURL = audioSourceElementValue;
}
else {
ogObject.ogAudioURL = audioSourceElementValue;
}
const audioSourceElementTypeValue = $('audio > source').attr('type');
if (!ogObject.ogAudioType && doesElementExist('audio > source', 'type', $))
ogObject.ogAudioType = audioSourceElementTypeValue;
}
}
// locale fallback
if (!ogObject.ogLocale) {
if (doesElementExist('html', 'lang', $)) {
ogObject.ogLocale = $('html').attr('lang');
}
else if (doesElementExist('head > meta[itemprop="inLanguage"]', 'content', $)) {
ogObject.ogLocale = $('head > meta[itemprop="inLanguage"]').attr('content');
}
}
// logo fallback
if (!ogObject.ogLogo) {
if (doesElementExist('meta[itemprop="logo"]', 'content', $)) {
ogObject.ogLogo = $('meta[itemprop="logo"]').attr('content');
}
else if (doesElementExist('img[itemprop="logo"]', 'src', $)) {
ogObject.ogLogo = $('img[itemprop="logo"]').attr('src');
}
}
// url fallback
if (!ogObject.ogUrl) {
if (doesElementExist('link[rel="canonical"]', 'href', $)) {
ogObject.ogUrl = $('link[rel="canonical"]').attr('href');
}
else if (doesElementExist('link[rel="alternate"][hreflang="x-default"]', 'href', $)) {
ogObject.ogUrl = $('link[rel="alternate"][hreflang="x-default"]').attr('href');
}
}
// date fallback
if (!ogObject.ogDate) {
if (doesElementExist('head > meta[name="date"]', 'content', $)) {
ogObject.ogDate = $('head > meta[name="date"]').attr('content');
}
else if (doesElementExist('[itemprop*="datemodified" i]', 'content', $)) {
ogObject.ogDate = $('[itemprop*="datemodified" i]').attr('content');
}
else if (doesElementExist('[itemprop="datepublished" i]', 'content', $)) {
ogObject.ogDate = $('[itemprop="datepublished" i]').attr('content');
}
else if (doesElementExist('[itemprop*="date" i]', 'content', $)) {
ogObject.ogDate = $('[itemprop*="date" i]').attr('content');
}
else if (doesElementExist('time[itemprop*="date" i]', 'datetime', $)) {
ogObject.ogDate = $('time[itemprop*="date" i]').attr('datetime');
}
else if (doesElementExist('time[datetime]', 'datetime', $)) {
ogObject.ogDate = $('time[datetime]').attr('datetime');
}
}
// favicon fallback
if (!ogObject.favicon) {
if (doesElementExist('link[rel="shortcut icon"]', 'href', $)) {
ogObject.favicon = $('link[rel="shortcut icon"]').attr('href');
}
else if (doesElementExist('link[rel="icon"]', 'href', $)) {
ogObject.favicon = $('link[rel="icon"]').attr('href');
}
else if (doesElementExist('link[rel="mask-icon"]', 'href', $)) {
ogObject.favicon = $('link[rel="mask-icon"]').attr('href');
}
else if (doesElementExist('link[rel="apple-touch-icon"]', 'href', $)) {
ogObject.favicon = $('link[rel="apple-touch-icon"]').attr('href');
}
else if (doesElementExist('link[type="image/png"]', 'href', $)) {
ogObject.favicon = $('link[type="image/png"]').attr('href');
}
else if (doesElementExist('link[type="image/ico"]', 'href', $)) {
ogObject.favicon = $('link[type="image/ico"]').attr('href');
}
else if (doesElementExist('link[type="image/x-icon"]', 'href', $)) {
ogObject.favicon = $('link[type="image/x-icon"]').attr('href');
}
}
// set the charset
if (doesElementExist('meta', 'charset', $)) {
ogObject.charset = $('meta').attr('charset');
}
else if (rawBody) {
ogObject.charset = chardet_1.default.detect(rawBody);
}
return ogObject;
}
exports.fallback = fallback;
exports.default = fallback;
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