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function intersect(a, b) {
if (b.length > a.length) { [a, b] = [b, a]; } // loop over shorter array
return a.filter(item => (b.indexOf(item) !== -1));
}
function insertAfter(newNode, referenceNode) {
referenceNode.parentNode.insertBefore(newNode, referenceNode.nextSibling);
}
function moveAll(fromNode, toNode) {
for (let c; c = fromNode.firstChild; ) { toNode.appendChild(c); }
}
function removeAllFrom(fromNode) {
for (let c; c = fromNode.lastChild; ) { fromNode.removeChild(c); }
}
function makeIframe(src, w, h, scrolling='no') {
let iframe = document.createElement('iframe');
iframe.style.width = w;
iframe.style.height = h;
iframe.frameBorder = 0;
iframe.scrolling = scrolling;
iframe.setAttribute('allowFullScreen', '');
iframe.src = src;
return iframe;
}
function wrapIntoTag(node, tagName, className) {
let tag = document.createElement(tagName);
if (className !== undefined) { tag.className = className; }
tag.appendChild(node);
return tag;
}
function makeResizableToRatio(element, ratio) {
element.dataset['ratio'] = ratio;
makeResizable(element, w => w * element.dataset['ratio']);
}
// calcHeight :: Number -> Number -- calculate element height for a given width
function makeResizable(element, calcHeight) {
const resizeToRatio = el => { el.style.height = (calcHeight(el.offsetWidth)).toFixed(2) + 'px'; };
window.addEventListener('resize', () => resizeToRatio(element));
resizeToRatio(element);
}
function getEmbeddableLinkTypes() {
return [
{
name: 'Jpeg and png images',
id: 'embed_jpeg_and_png_images',
ctsDefault: false,
re: /\.(jpeg|jpg|png|svg)(:[a-zA-Z]+)?(?:\?[\w&;\?=]*)?$/i,
makeNode: function(aNode) {
let aNode2 = document.createElement('a');
let imgNode = document.createElement('img');
imgNode.src = aNode.href;
aNode2.href = aNode.href;
aNode2.appendChild(imgNode);
return wrapIntoTag(aNode2, 'div', 'picture compact');
}
},
{
name: 'Gif images',
id: 'embed_gif_images',
ctsDefault: true,
re: /\.gif(:[a-zA-Z]+)?(?:\?[\w&;\?=]*)?$/i,
makeNode: function(aNode) {
let aNode2 = document.createElement('a');
let imgNode = document.createElement('img');
imgNode.src = aNode.href;
aNode2.href = aNode.href;
aNode2.appendChild(imgNode);
return wrapIntoTag(aNode2, 'div', 'picture compact');
}
},
{
name: 'Video (webm, mp4, ogv)',
id: 'embed_webm_and_mp4_videos',
ctsDefault: false,
re: /\.(webm|mp4|m4v|ogv)(?:\?[\w&;\?=]*)?$/i,
makeNode: function(aNode) {
let video = document.createElement('video');
video.src = aNode.href;
video.title = aNode.href;
video.setAttribute('controls', '');
return wrapIntoTag(video, 'div', 'video compact');
}
},
{
name: 'Audio (mp3, ogg, weba, opus, m4a, oga, wav)',
id: 'embed_sound_files',
ctsDefault: false,
re: /\.(mp3|ogg|weba|opus|m4a|oga|wav)(?:\?[\w&;\?=]*)?$/i,
makeNode: function(aNode) {
let audio = document.createElement('audio');
audio.src = aNode.href;
audio.title = aNode.href;
audio.setAttribute('controls', '');
return wrapIntoTag(audio, 'div', 'audio');
}
},
{
name: 'YouTube videos (and playlists)',
id: 'embed_youtube_videos',
onByDefault: false,
ctsDefault: false,
re: /^(?:https?:)?\/\/(?:www\.|m\.)?(?:youtu(?:(?:\.be\/|be\.com\/(?:v|embed)\/)([-\w]+)|be\.com\/watch)((?:(?:\?|&(?:amp;)?)(?:\w+=[-\.\w]*[-\w]))*)|youtube\.com\/playlist\?list=([-\w]*)(&(amp;)?[-\w\?=]*)?)/i,
makeNode: function(aNode, reResult) {
let [url, v, args, plist] = reResult;
let iframeUrl;
if (plist !== undefined) {
iframeUrl = '//www.youtube-nocookie.com/embed/videoseries?list=' + plist;
} else {
args = args.replace(/^\?/, '');
let arr = args.split('&').map(s => s.split('='));
let pp = {}; arr.forEach(z => pp[z[0]] = z[1]);
let embedArgs = { rel: '0' };
if (pp.t != undefined) {
const tre = /^(?:(\d+)|(?:(\d+)h)?(?:(\d+)m)?(\d+)s|(?:(\d+)h)?(\d+)m|(\d+)h)$/i;
let [, t, h, m, s, h1, m1, h2] = tre.exec(pp.t);
embedArgs['start'] = (+t) || ((+(h || h1 || h2 || 0))*60*60 + (+(m || m1 || 0))*60 + (+(s || 0)));
}
if (pp.list !== undefined) {
embedArgs['list'] = pp.list;
}
v = v || pp.v;
iframeUrl = '//www.youtube-nocookie.com/embed/' + v + '?' + Object.keys(embedArgs).map(k => `${k}=${embedArgs[k]}`).join('&');
}
let iframe = makeIframe(iframeUrl, '100%', '360px');
setTimeout(() => makeResizableToRatio(iframe, 9.0/16.0), 10);
return wrapIntoTag(iframe, 'div', 'youtube resizableV');
}
},
{
name: 'Vimeo videos',
id: 'embed_vimeo_videos',
onByDefault: false,
ctsDefault: false,
//re: /^(?:https?:)?\/\/(?:www\.)?(?:player\.)?vimeo\.com\/(?:(?:video\/|album\/[\d]+\/video\/)?([\d]+)|([\w-]+)\/(?!videos)([\w-]+))/i,
re: /^(?:https?:)?\/\/(?:www\.)?(?:player\.)?vimeo\.com\/(?:video\/|album\/[\d]+\/video\/)?([\d]+)/i,
makeNode: function(aNode, reResult) {
let iframe = makeIframe('//player.vimeo.com/video/' + reResult[1], '100%', '360px');
setTimeout(() => makeResizableToRatio(iframe, 9.0/16.0), 10);
return wrapIntoTag(iframe, 'div', 'vimeo resizableV');
}
}
];
}
function embedLink(aNode, linkTypes, container, alwaysCts, afterNode) {
let anyEmbed = false;
let linkId = (aNode.href.replace(/^https?:/i, '').replace(/\'/i,''));
let sameEmbed = container.querySelector(`*[data-linkid='${linkId}']`); // do not embed the same thing twice
if (sameEmbed === null) {
anyEmbed = [].some.call(linkTypes, function(linkType) {
let reResult = linkType.re.exec(aNode.href);
if (reResult !== null) {
if ((linkType.match !== undefined) && (linkType.match(aNode, reResult) === false)) { return false; }
let newNode = linkType.makeNode(aNode, reResult);
if (!newNode) { return false; }
newNode.setAttribute('data-linkid', linkId);
if (afterNode !== undefined) {
insertAfter(newNode, afterNode);
} else {
container.appendChild(newNode);
}
aNode.classList.add('embedLink');
return true;
}
});
}
return anyEmbed;
}
function embedLinks(aNodes, container, alwaysCts, afterNode) {
let anyEmbed = false;
let embeddableLinkTypes = getEmbeddableLinkTypes();
Array.from(aNodes).forEach(aNode => {
let isEmbedded = embedLink(aNode, embeddableLinkTypes, container, alwaysCts, afterNode);
anyEmbed = anyEmbed || isEmbedded;
});
return anyEmbed;
}
function articleInfo(article) {
let tagNodes = article.querySelectorAll('.msg-tags > *');
let tags = Array.from(tagNodes).map(d => d.textContent.toLowerCase());
return { tags: tags };
}
function embedLinksToX(x, beforeNodeSelector, allLinksSelector, ctsUsers, ctsTags) {
let isCtsPost = false;
let allLinks = x.querySelectorAll(allLinksSelector);
let existingContainer = x.querySelector('div.embedContainer');
if (existingContainer !== null) {
embedLinks(allLinks, existingContainer, isCtsPost);
} else {
let embedContainer = document.createElement('div');
embedContainer.className = 'embedContainer';
let anyEmbed = embedLinks(allLinks, embedContainer, isCtsPost);
if (anyEmbed) {
let beforeNode = x.querySelector(beforeNodeSelector);
x.insertBefore(embedContainer, beforeNode);
}
}
}
function embedLinksToArticles() {
let ctsUsers = [], ctsTags = []; // TODO click-to-show users and tags
let beforeNodeSelector = 'nav.l';
let allLinksSelector = 'p:not(.ir) a, pre a';
Array.from(document.querySelectorAll('#content > article')).forEach(article => {
embedLinksToX(article, beforeNodeSelector, allLinksSelector, ctsUsers, ctsTags);
});
}
function embedLinksToPost() {
let ctsUsers = [], ctsTags = []; // TODO click-to-show users and tags
let beforeNodeSelector = '.msg-txt + *';
let allLinksSelector = '.msg-txt a';
Array.from(document.querySelectorAll('#content .msg-cont')).forEach(msg => {
embedLinksToX(msg, beforeNodeSelector, allLinksSelector, ctsUsers, ctsTags);
});
}
exports.embed = function() {
if (document.querySelectorAll('#content > article').length) {
embedLinksToArticles();
} else {
embedLinksToPost();
}
};
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