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const Mustache = require('mustache');
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const DateTime = require('luxon').DateTime;
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const github = require('./package.json').homepage;
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const { formatBytes, randomHexColour } = require('./utils');
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// https://ogp.me/
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class OpenGraph {
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http;
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domain;
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resourceId;
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filename;
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type;
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size;
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timestamp;
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vibrant;
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title;
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description;
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author;
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color;
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constructor(http, domain, resourceId, { originalname, mimetype, size, timestamp, opengraph, vibrant }) {
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this.http = http;
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this.domain = domain;
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this.resourceId = resourceId;
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this.type = mimetype;
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this.filename = originalname;
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this.size = size;
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this.timestamp = timestamp;
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this.vibrant = vibrant;
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this.title = opengraph.title || '';
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this.description = opengraph.description || '';
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this.author = opengraph.author || '';
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this.color = opengraph.color || '';
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}
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build() {
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return Mustache.render(html, {
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github,
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http: this.http,
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domain: this.domain,
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resourceId: this.resourceId,
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ogtype: this.type.includes('video') ? 'video.other' : 'image',
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type: this.type.includes('video') ? 'video' : 'image',
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ext: this.type.includes('video') ? '.mp4' : this.type.includes('gif') ? '.gif' : '',
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title: (this.title.length != 0) ? `<meta property="og:title" content="${this.title}">` : '',
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description: (this.description.length != 0) ? `<meta property="og:description" content="${this.description}">` : '',
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site: (this.author.length != 0) ? `<meta property="og:site_name" content="${this.author}">` : '',
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color: (this.color.length != 0) ? `<meta name="theme-color" content="${this.getBuildColor()}">` : '',
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card: !this.type.includes('video') ? `<meta name="twitter:card" content="summary_large_image">` : '',
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})
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.replace(new RegExp('&size', 'g'), formatBytes(this.size))
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.replace(new RegExp('&filename', 'g'), this.filename)
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.replace(new RegExp('×tamp', 'g'), DateTime.fromMillis(this.timestamp).toLocaleString(DateTime.DATETIME_MED));
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}
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getBuildColor() {
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return this.color === '&random' ? randomHexColour() : this.color === '&vibrant' ? this.vibrant : this.color;
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}
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}
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const html = `
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<html>
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<head>
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<title>ass</title>
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<!-- Open Graph (https://ogp.me/) -->
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<meta property="og:type" content="{{{ogtype}}}">
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<meta property="og:{{{type}}}" content="{{{http}}}{{{domain}}}/{{{resourceId}}}{{{ext}}}">
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{{{title}}}
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{{{description}}}
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{{{site}}}
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{{{color}}}
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{{{card}}}
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<!-- oEmbed (https://oembed.com/) -->
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<link rel="alternate" type="application/json+oembed" href="{{{http}}}{{{domain}}}/{{{resourceId}}}/oembed.json" title="oEmbed">
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</head>
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<body>
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Open Graph response for <a href="{{{github}}}" target="_blank">ass</a>.
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</body>
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</html>
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`;
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module.exports = OpenGraph;
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