iframely/plugins/links/favicon.js

oEmbed/2 gateway endpoint. Get embed data for various http links through one self-hosted API

export default {

    getLink: function(url, meta) {

        function findIcons(links, filter) {
            var key, l;

            for (key in meta) {

                if (filter(key)) {

                    l = meta[key];

                    if (!(l instanceof Array)) {
                        l = [l];
                    }

                    l.forEach(function(link) {

                        var m = link.sizes?.match(/^(\d+)x(\d+)$/i);

                        var href = link.href;
                        if (typeof link === "string") {
                            href = link;
                        }

                        if (href !== url && href !== meta.canonical && (!meta.og || meta.og.canonical !== url)) {
                            var result = {
                                href: href,
                                rel: [...key.split(' '), 'icon'],
                                type: link.type || CONFIG.T.image,
                                width: m && parseInt(m[1]),
                                height: m && parseInt(m[2])
                            };
                            if (link.color) {
                                result.color = link.color;
                            }
                            links.push(result);
                        }
                    });
                }
            }
        }

        var links = [];

        // Filter not 'shortcut icon'.
        findIcons(links, function(key) {
            return /icon/i.test(key) && key != 'shortcut icon';
        });

        // Use 'shortcut icon' if no other.
        findIcons(links, function(key) {
            return key == 'shortcut icon';
        });

        // Push default icon if no icons at all.
        if (links.length == 0 && Object.keys(meta).length > 0) {
            links.push({
                href: '/favicon.ico',
                type: CONFIG.T.image,
                rel: CONFIG.R.icon,
                _imageStatus: {
                    forceSyncCheck: true
                }
            });
        }

        return links;
    }
};