63 lines
1.4 KiB
JavaScript
63 lines
1.4 KiB
JavaScript
let cache = {};
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export default {
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install (Vue) {
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//Takes a HTML string then parses it and replaces appropriate
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//links with the relevant expansion
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//Returns a callback with the 'expanded' HTML string
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Vue.prototype.$linkExpander = function (HTML, cb) {
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let completed = 0;
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let completedAPICall = () => {
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completed++;
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if(completed === links.length) {
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cb(parsed.innerHTML);
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}
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};
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let replaceLink = (html, link) => {
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if(html.length) {
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let div = document.createElement('div');
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div.innerHTML = html;
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link.parentNode.replaceChild(
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div.children[0],
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link
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);
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}
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completedAPICall();
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};
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let parsed = document.createElement('div');
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parsed.innerHTML = HTML;
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let links = Array
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.from(parsed.querySelectorAll('p a[href]'))
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.filter(a => {
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return (
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a.parentNode.parentNode === parsed &&
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a.parentNode.childNodes.length === 1 &&
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a.innerHTML === a.href
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)
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});
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links.forEach(link => {
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let cached = cache[link.href];
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if(cached) {
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replaceLink(cached, link);
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} else {
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Vue.axios
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.get(process.env.VUE_APP_API_ENDPOINT + process.env.VUE_APP_API_VERSION + '/' + 'forums/link_preview?url=' + link.href)
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.then(res => {
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cache[link.href] = res.data;
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replaceLink(res.data, link);
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})
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.catch(completedAPICall);
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}
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})
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}
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}
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}
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