44 lines
1.6 KiB
TypeScript
44 lines
1.6 KiB
TypeScript
export function enhance(text: string, parseMoves: boolean): string {
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const escaped = lichess.escapeHtml(text);
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const linked = autoLink(escaped);
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const plied = parseMoves && linked === escaped ? addPlies(linked) : linked;
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return plied;
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}
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const moreThanTextPattern = /[&<>"@]/;
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const possibleLinkPattern = /\.\w/;
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export function isMoreThanText(str: string) {
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return moreThanTextPattern.test(str) || possibleLinkPattern.test(str);
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}
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const linkPattern = /\b\b(?:https?:\/\/)?(lichess\.org\/[-–—\w+&'@#\/%?=()~|!:,.;]+[\w+&@#\/%=~|])/gi;
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function linkReplace(_: string, url: string) {
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if (url.includes('"')) return url;
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return `<a target="_blank" rel="nofollow noopener noreferrer" href="https://${url}">${url}</a>`;
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}
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const userPattern = /(^|[^\w@#/])@([\w-]{2,})/g;
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const pawnDropPattern = /^[a-h][2-7]$/;
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function userLinkReplace(orig: string, prefix: string, user: string) {
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if (user.length > 20 || user.match(pawnDropPattern)) return orig;
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return prefix + '<a href="/@/' + user + '">@' + user + '</a>';
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}
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function autoLink(html: string) {
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return html.replace(userPattern, userLinkReplace).replace(linkPattern, linkReplace);
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}
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const movePattern = /\b(\d+)\s*(\.+)\s*(?:[o0-]+[o0]|[NBRQKP\u2654\u2655\u2656\u2657\u2658\u2659]?[a-h]?[1-8]?[x@]?[a-z][1-8](?:=[NBRQK\u2654\u2655\u2656\u2657\u2658\u2659])?)\+?\#?[!\?=]{0,5}/gi;
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function moveReplacer(match: string, turn: number, dots: string) {
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if (turn < 1 || turn > 200) return match;
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const ply = turn * 2 - (dots.length > 1 ? 0 : 1);
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return '<a class="jump" data-ply="' + ply + '">' + match + '</a>';
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}
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function addPlies(html: string) {
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return html.replace(movePattern, moveReplacer);
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}
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