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import * as mfm from 'mfm-js';
import { unique } from '@/prelude/array';
// unique without hash
// [ http://a/#1, http://a/#2, http://b/#3 ] => [ http://a/#1, http://b/#3 ]
const removeHash = (x: string) => x.replace(/#[^#]*$/, '');
export function extractUrlFromMfm(nodes: mfm.MfmNode[], respectSilentFlag = true): string[] {
let urls = [] as string[];
mfm.inspect(nodes, (node) => {
if (node.type === 'url') {
urls.push(node.props.url);
} else if (node.type === 'link' && (!respectSilentFlag || !node.props.silent)) {
urls.push(node.props.url);
}
});
urls = unique(urls);
return urls.reduce((array, url) => {
const urlWithoutHash = removeHash(url);
if (!array.map(x => removeHash(x)).includes(urlWithoutHash)) array.push(url);
return array;
}, [] as string[]);
}
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