iceshrimp-161sh/src/mfm/parser.ts
2018-12-07 18:26:54 +09:00

391 lines
15 KiB
TypeScript
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

import * as P from 'parsimmon';
import parseAcct from '../misc/acct/parse';
import { toUnicode } from 'punycode';
import { takeWhile } from '../prelude/array';
const emojiRegex = /((?:\ud83d[\udc68\udc69])(?:\ud83c[\udffb-\udfff])?\u200d(?:\u2695\ufe0f|\u2696\ufe0f|\u2708\ufe0f|\ud83c[\udf3e\udf73\udf93\udfa4\udfa8\udfeb\udfed]|\ud83d[\udcbb\udcbc\udd27\udd2c\ude80\ude92]|\ud83e[\uddb0-\uddb3])|(?:\ud83c[\udfcb\udfcc]|\ud83d[\udd74\udd75]|\u26f9)((?:\ud83c[\udffb-\udfff]|\ufe0f)\u200d[\u2640\u2642]\ufe0f)|(?:\ud83c[\udfc3\udfc4\udfca]|\ud83d[\udc6e\udc71\udc73\udc77\udc81\udc82\udc86\udc87\ude45-\ude47\ude4b\ude4d\ude4e\udea3\udeb4-\udeb6]|\ud83e[\udd26\udd35\udd37-\udd39\udd3d\udd3e\uddb8\uddb9\uddd6-\udddd])(?:\ud83c[\udffb-\udfff])?\u200d[\u2640\u2642]\ufe0f|(?:\ud83d\udc68\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d\udc68|\ud83d\udc68\u200d\ud83d\udc68\u200d\ud83d\udc66\u200d\ud83d\udc66|\ud83d\udc68\u200d\ud83d\udc68\u200d\ud83d\udc67\u200d\ud83d[\udc66\udc67]|\ud83d\udc68\u200d\ud83d\udc69\u200d\ud83d\udc66\u200d\ud83d\udc66|\ud83d\udc68\u200d\ud83d\udc69\u200d\ud83d\udc67\u200d\ud83d[\udc66\udc67]|\ud83d\udc69\u200d\u2764\ufe0f\u200d\ud83d\udc8b\u200d\ud83d[\udc68\udc69]|\ud83d\udc69\u200d\ud83d\udc69\u200d\ud83d\udc66\u200d\ud83d\udc66|\ud83d\udc69\u200d\ud83d\udc69\u200d\ud83d\udc67\u200d\ud83d[\udc66\udc67]|\ud83d\udc68\u200d\u2764\ufe0f\u200d\ud83d\udc68|\ud83d\udc68\u200d\ud83d\udc66\u200d\ud83d\udc66|\ud83d\udc68\u200d\ud83d\udc67\u200d\ud83d[\udc66\udc67]|\ud83d\udc68\u200d\ud83d\udc68\u200d\ud83d[\udc66\udc67]|\ud83d\udc68\u200d\ud83d\udc69\u200d\ud83d[\udc66\udc67]|\ud83d\udc69\u200d\u2764\ufe0f\u200d\ud83d[\udc68\udc69]|\ud83d\udc69\u200d\ud83d\udc66\u200d\ud83d\udc66|\ud83d\udc69\u200d\ud83d\udc67\u200d\ud83d[\udc66\udc67]|\ud83d\udc69\u200d\ud83d\udc69\u200d\ud83d[\udc66\udc67]|\ud83c\udff3\ufe0f\u200d\ud83c\udf08|\ud83c\udff4\u200d\u2620\ufe0f|\ud83d\udc41\u200d\ud83d\udde8|\ud83d\udc68\u200d\ud83d[\udc66\udc67]|\ud83d\udc69\u200d\ud83d[\udc66\udc67]|\ud83d\udc6f\u200d\u2640\ufe0f|\ud83d\udc6f\u200d\u2642\ufe0f|\ud83e\udd3c\u200d\u2640\ufe0f|\ud83e\udd3c\u200d\u2642\ufe0f|\ud83e\uddde\u200d\u2640\ufe0f|\ud83e\uddde\u200d\u2642\ufe0f|\ud83e\udddf\u200d\u2640\ufe0f|\ud83e\udddf\u200d\u2642\ufe0f)|[\u0023\u002a\u0030-\u0039]\ufe0f?\u20e3|(?:[\u00a9\u00ae\u2122\u265f]\ufe0f)|(?:\ud83c[\udc04\udd70\udd71\udd7e\udd7f\ude02\ude1a\ude2f\ude37\udf21\udf24-\udf2c\udf36\udf7d\udf96\udf97\udf99-\udf9b\udf9e\udf9f\udfcd\udfce\udfd4-\udfdf\udff3\udff5\udff7]|\ud83d[\udc3f\udc41\udcfd\udd49\udd4a\udd6f\udd70\udd73\udd76-\udd79\udd87\udd8a-\udd8d\udda5\udda8\uddb1\uddb2\uddbc\uddc2-\uddc4\uddd1-\uddd3\udddc-\uddde\udde1\udde3\udde8\uddef\uddf3\uddfa\udecb\udecd-\udecf\udee0-\udee5\udee9\udef0\udef3]|[\u203c\u2049\u2139\u2194-\u2199\u21a9\u21aa\u231a\u231b\u2328\u23cf\u23ed-\u23ef\u23f1\u23f2\u23f8-\u23fa\u24c2\u25aa\u25ab\u25b6\u25c0\u25fb-\u25fe\u2600-\u2604\u260e\u2611\u2614\u2615\u2618\u2620\u2622\u2623\u2626\u262a\u262e\u262f\u2638-\u263a\u2640\u2642\u2648-\u2653\u2660\u2663\u2665\u2666\u2668\u267b\u267f\u2692-\u2697\u2699\u269b\u269c\u26a0\u26a1\u26aa\u26ab\u26b0\u26b1\u26bd\u26be\u26c4\u26c5\u26c8\u26cf\u26d1\u26d3\u26d4\u26e9\u26ea\u26f0-\u26f5\u26f8\u26fa\u26fd\u2702\u2708\u2709\u270f\u2712\u2714\u2716\u271d\u2721\u2733\u2734\u2744\u2747\u2757\u2763\u2764\u27a1\u2934\u2935\u2b05-\u2b07\u2b1b\u2b1c\u2b50\u2b55\u3030\u303d\u3297\u3299])(?:\ufe0f|(?!\ufe0e))|(?:(?:\ud83c[\udfcb\udfcc]|\ud83d[\udd74\udd75\udd90]|[\u261d\u26f7\u26f9\u270c\u270d])(?:\ufe0f|(?!\ufe0e))|(?:\ud83c[\udf85\udfc2-\udfc4\udfc7\udfca]|\ud83d[\udc42\udc43\udc46-\udc50\udc66-\udc69\udc6e\udc70-\udc78\udc7c\udc81-\udc83\udc85-\udc87\udcaa\udd7a\udd95\udd96\ude45-\ude47\ude4b-\ude4f\udea3\udeb4-\udeb6\udec0\udecc]|\ud83e[\udd18-\udd1c\udd1e\udd1f\udd26\udd30-\udd39\udd3d\udd3e\uddb5\uddb6\uddb8\uddb9\uddd1-\udddd]|[\u270a\u270b]))(?:\ud83c[\udffb-\udfff])?|(?:\ud83c\udff4\udb40\udc67\udb40\udc62\udb40\udc65\udb40\udc6e\udb40\udc67\udb40\udc7f|\ud83c\udff4\udb40\udc67\udb40\udc62\udb40\udc73\udb40\udc63\udb40\udc74\udb40\udc7f|\ud83c\udff4\udb40\udc67\udb40\udc62\udb40\udc77\udb40\udc6c\udb40\udc73\udb40\udc7f|\ud83c\udde6\ud83c[\udde8-\uddec\uddee\uddf1\uddf2\uddf4\uddf6-\uddfa\uddfc\uddfd\uddff]|\ud83c\udde7\ud83c[\udde6\udde7\udde9-\uddef\uddf1-\uddf4\uddf6-\uddf9\uddfb\uddfc\uddfe\uddff]|\ud83c\udde8\ud83c[\udde6\udde8\udde9\uddeb-\uddee\uddf0-\uddf5\uddf7\uddfa-\uddff]|\ud83c\udde9\ud83c[\uddea\uddec\uddef\uddf0\uddf2\uddf4\uddff]|\ud83c\uddea\ud83c[\udde6\udde8\uddea\uddec\udded\uddf7-\uddfa]|\ud83c\uddeb\ud83c[\uddee-\uddf0\uddf2\uddf4\uddf7]|\ud83c\uddec\ud83c[\udde6\udde7\udde9-\uddee\uddf1-\uddf3\uddf5-\uddfa\uddfc\uddfe]|\ud83c\udded\ud83c[\uddf0\uddf2\uddf3\uddf7\uddf9\uddfa]|\ud83c\uddee\ud83c[\udde8-\uddea\uddf1-\uddf4\uddf6-\uddf9]|\ud83c\uddef\ud83c[\uddea\uddf2\uddf4\uddf5]|\ud83c\uddf0\ud83c[\uddea\uddec-\uddee\uddf2\uddf3\uddf5\uddf7\uddfc\uddfe\uddff]|\ud83c\uddf1\ud83c[\udde6-\udde8\uddee\uddf0\uddf7-\uddfb\uddfe]|\ud83c\uddf2\ud83c[\udde6\udde8-\udded\uddf0-\uddff]|\ud83c\uddf3\ud83c[\udde6\udde8\uddea-\uddec\uddee\uddf1\uddf4\uddf5\uddf7\uddfa\uddff]|\ud83c\uddf4\ud83c\uddf2|\ud83c\uddf5\ud83c[\udde6\uddea-\udded\uddf0-\uddf3\uddf7-\uddf9\uddfc\uddfe]|\ud83c\uddf6\ud83c\udde6|\ud83c\uddf7\ud83c[\uddea\uddf4\uddf8\uddfa\uddfc]|\ud83c\uddf8\ud83c[\udde6-\uddea\uddec-\uddf4\uddf7-\uddf9\uddfb\uddfd-\uddff]|\ud83c\uddf9\ud83c[\udde6\udde8\udde9\uddeb-\udded\uddef-\uddf4\uddf7\uddf9\uddfb\uddfc\uddff]|\ud83c\uddfa\ud83c[\udde6\uddec\uddf2\uddf3\uddf8\uddfe\uddff]|\ud83c\uddfb\ud83c[\udde6\udde8\uddea\uddec\uddee\uddf3\uddfa]|\ud83c\uddfc\ud83c[\uddeb\uddf8]|\ud83c\uddfd\ud83c\uddf0|\ud83c\uddfe\ud83c[\uddea\uddf9]|\ud83c\uddff\ud83c[\udde6\uddf2\uddfc]|\ud83c[\udccf\udd8e\udd91-\udd9a\udde6-\uddff\ude01\ude32-\ude36\ude38-\ude3a\ude50\ude51\udf00-\udf20\udf2d-\udf35\udf37-\udf7c\udf7e-\udf84\udf86-\udf93\udfa0-\udfc1\udfc5\udfc6\udfc8\udfc9\udfcf-\udfd3\udfe0-\udff0\udff4\udff8-\udfff]|\ud83d[\udc00-\udc3e\udc40\udc44\udc45\udc51-\udc65\udc6a-\udc6d\udc6f\udc79-\udc7b\udc7d-\udc80\udc84\udc88-\udca9\udcab-\udcfc\udcff-\udd3d\udd4b-\udd4e\udd50-\udd67\udda4\uddfb-\ude44\ude48-\ude4a\ude80-\udea2\udea4-\udeb3\udeb7-\udebf\udec1-\udec5\uded0-\uded2\udeeb\udeec\udef4-\udef9]|\ud83e[\udd10-\udd17\udd1d\udd20-\udd25\udd27-\udd2f\udd3a\udd3c\udd40-\udd45\udd47-\udd70\udd73-\udd76\udd7a\udd7c-\udda2\uddb4\uddb7\uddc0-\uddc2\uddd0\uddde-\uddff]|[\u23e9-\u23ec\u23f0\u23f3\u267e\u26ce\u2705\u2728\u274c\u274e\u2753-\u2755\u2795-\u2797\u27b0\u27bf\ue50a])|\ufe0f)/;
export type Node = {
name: string,
children?: Node[],
props?: any;
};
function _makeNode(name: string, children?: Node[], props?: any): Node {
return children ? {
name,
children,
props
} : {
name,
props
};
}
function makeNode(name: string, props?: any): Node {
return _makeNode(name, null, props);
}
function makeNodeWithChildren(name: string, children: Node[], props?: any): Node {
return _makeNode(name, children, props);
}
function getTrailingPosition(x: string): number {
const brackets = [
['(', ')'],
['「', '」'],
];
const pendingBrackets = [] as any;
const end = x.split('').findIndex(char => {
const closeMatch = brackets.map(x => x[1]).indexOf(char);
const openMatch = brackets.map(x => x[0]).indexOf(char);
if (closeMatch != -1) {
if (pendingBrackets[closeMatch] > 0) {
pendingBrackets[closeMatch]--;
return false;
} else {
return true;
}
} else if (openMatch != -1) {
pendingBrackets[openMatch] = (pendingBrackets[openMatch] || 0) + 1;
return false;
} else {
return false;
}
});
return end > 0 ? end : x.length;
}
const newline = P((input, i) => {
if (i == 0 || input[i] == '\n' || input[i - 1] == '\n') {
return P.makeSuccess(i, null);
} else {
return P.makeFailure(i, 'not newline');
}
});
export const plainParser = P.createLanguage({
root: r => P.alt(
r.emoji,
r.text
).atLeast(1),
text: () => P.any.map(x => makeNode('text', { text: x })),
//#region Emoji
emoji: r =>
P.alt(
P.regexp(/:([a-z0-9_+-]+):/i, 1)
.map(x => makeNode('emoji', {
name: x
})),
P.regexp(emojiRegex)
.map(x => makeNode('emoji', {
emoji: x
})),
),
//#endregion
});
const mfm = P.createLanguage({
root: r => P.alt(
r.big,
r.small,
r.bold,
r.strike,
r.italic,
r.motion,
r.url,
r.link,
r.mention,
r.hashtag,
r.emoji,
r.blockCode,
r.inlineCode,
r.quote,
r.math,
r.search,
r.title,
r.center,
r.text
).atLeast(1),
text: () => P.any.map(x => makeNode('text', { text: x })),
//#region Big
big: r =>
P.regexp(/^\*\*\*([\s\S]+?)\*\*\*/, 1)
.map(x => makeNodeWithChildren('big', P.alt(
r.strike,
r.italic,
r.mention,
r.hashtag,
r.emoji,
r.math,
r.text
).atLeast(1).tryParse(x))),
//#endregion
//#region Small
small: r =>
P.regexp(/<small>([\s\S]+?)<\/small>/, 1)
.map(x => makeNodeWithChildren('small', P.alt(
r.strike,
r.italic,
r.mention,
r.hashtag,
r.emoji,
r.math,
r.text
).atLeast(1).tryParse(x))),
//#endregion
//#region Block code
blockCode: r =>
newline.then(
P((input, i) => {
const text = input.substr(i);
const match = text.match(/^```(.+?)?\n([\s\S]+?)\n```(\n|$)/i);
if (!match) return P.makeFailure(i, 'not a blockCode');
return P.makeSuccess(i + match[0].length, makeNode('blockCode', { code: match[2], lang: match[1] ? match[1].trim() : null }));
})
),
//#endregion
//#region Bold
bold: r =>
P.regexp(/\*\*([\s\S]+?)\*\*/, 1)
.map(x => makeNodeWithChildren('bold', P.alt(
r.strike,
r.italic,
r.mention,
r.hashtag,
r.url,
r.link,
r.emoji,
r.text
).atLeast(1).tryParse(x))),
//#endregion
//#region Center
center: r =>
P.regexp(/<center>([\s\S]+?)<\/center>/, 1)
.map(x => makeNodeWithChildren('center', P.alt(
r.big,
r.small,
r.bold,
r.strike,
r.italic,
r.motion,
r.mention,
r.hashtag,
r.emoji,
r.math,
r.url,
r.link,
r.text
).atLeast(1).tryParse(x))),
//#endregion
//#region Emoji
emoji: r =>
P.alt(
P.regexp(/:([a-z0-9_+-]+):/i, 1)
.map(x => makeNode('emoji', {
name: x
})),
P.regexp(emojiRegex)
.map(x => makeNode('emoji', {
emoji: x
})),
),
//#endregion
//#region Hashtag
hashtag: r =>
P((input, i) => {
const text = input.substr(i);
const match = text.match(/^#([^\s\.,!\?#]+)/i);
if (!match) return P.makeFailure(i, 'not a hashtag');
let hashtag = match[1];
hashtag = hashtag.substr(0, getTrailingPosition(hashtag));
if (hashtag.match(/^[0-9]+$/)) return P.makeFailure(i, 'not a hashtag');
if (input[i - 1] != null && input[i - 1].match(/[a-z0-9]/i)) return P.makeFailure(i, 'not a hashtag');
if (hashtag.length > 50) return P.makeFailure(i, 'not a hashtag');
return P.makeSuccess(i + ('#' + hashtag).length, makeNode('hashtag', { hashtag: hashtag }));
}),
//#endregion
//#region Inline code
inlineCode: r =>
P.regexp(/`([^´\n]+?)`/, 1)
.map(x => makeNode('inlineCode', { code: x })),
//#endregion
//#region Italic
italic: r =>
P.regexp(/<i>([\s\S]+?)<\/i>/, 1)
.map(x => makeNodeWithChildren('italic', P.alt(
r.bold,
r.strike,
r.mention,
r.hashtag,
r.url,
r.link,
r.emoji,
r.text
).atLeast(1).tryParse(x))),
//#endregion
//#region Link
link: r =>
P.seqObj(
['silent', P.string('?').fallback(null).map(x => x != null)] as any,
P.string('['),
['text', P.regexp(/[^\n\[\]]+/)] as any,
P.string(']'),
P.string('('),
['url', r.url] as any,
P.string(')'),
)
.map((x: any) => {
return makeNodeWithChildren('link', P.alt(
r.big,
r.small,
r.bold,
r.strike,
r.italic,
r.motion,
r.emoji,
r.text
).atLeast(1).tryParse(x.text), {
silent: x.silent,
url: x.url.props.url
});
}),
//#endregion
//#region Math
math: r =>
P.regexp(/\\\((.+?)\\\)/, 1)
.map(x => makeNode('math', { formula: x })),
//#endregion
//#region Mention
mention: r =>
P((input, i) => {
const text = input.substr(i);
const match = text.match(/^@[a-z0-9_]+(?:@[a-z0-9\.\-]+[a-z0-9])?/i);
if (!match) return P.makeFailure(i, 'not a mention');
if (input[i - 1] != null && input[i - 1].match(/[a-z0-9]/i)) return P.makeFailure(i, 'not a mention');
return P.makeSuccess(i + match[0].length, match[0]);
})
.map(x => {
const { username, host } = parseAcct(x.substr(1));
const canonical = host != null ? `@${username}@${toUnicode(host)}` : x;
return makeNode('mention', {
canonical, username, host, acct: x
});
}),
//#endregion
//#region Motion
motion: r =>
P.alt(P.regexp(/\(\(\(([\s\S]+?)\)\)\)/, 1), P.regexp(/<motion>(.+?)<\/motion>/, 1))
.map(x => makeNodeWithChildren('motion', P.alt(
r.bold,
r.small,
r.strike,
r.italic,
r.mention,
r.hashtag,
r.emoji,
r.url,
r.link,
r.math,
r.text
).atLeast(1).tryParse(x))),
//#endregion
//#region Quote
quote: r =>
newline.then(P((input, i) => {
const text = input.substr(i);
if (!text.match(/^>[\s\S]+?/)) return P.makeFailure(i, 'not a quote');
const quote = takeWhile(line => line.startsWith('>'), text.split('\n'));
const qInner = quote.join('\n').replace(/^>/gm, '').replace(/^ /gm, '');
if (qInner == '') return P.makeFailure(i, 'not a quote');
const contents = r.root.tryParse(qInner);
return P.makeSuccess(i + quote.join('\n').length + 1, makeNodeWithChildren('quote', contents));
})),
//#endregion
//#region Search
search: r =>
newline.then(P((input, i) => {
const text = input.substr(i);
const match = text.match(/^(.+?)( | )(検索|\[検索\]|Search|\[Search\])(\n|$)/i);
if (!match) return P.makeFailure(i, 'not a search');
return P.makeSuccess(i + match[0].length, makeNode('search', { query: match[1], content: match[0].trim() }));
})),
//#endregion
//#region Strike
strike: r =>
P.regexp(/~~(.+?)~~/, 1)
.map(x => makeNodeWithChildren('strike', P.alt(
r.bold,
r.italic,
r.mention,
r.hashtag,
r.url,
r.link,
r.emoji,
r.text
).atLeast(1).tryParse(x))),
//#endregion
//#region Title
title: r =>
newline.then(P((input, i) => {
const text = input.substr(i);
const match = text.match(/^((【|\[)(.+?)(】|]))(\n|$)/);
if (!match) return P.makeFailure(i, 'not a title');
const q = match[1].trim().substring(1, match[1].length - 1);
const contents = P.alt(
r.big,
r.small,
r.bold,
r.strike,
r.italic,
r.motion,
r.url,
r.link,
r.mention,
r.hashtag,
r.emoji,
r.inlineCode,
r.text
).atLeast(1).tryParse(q);
return P.makeSuccess(i + match[0].length, makeNodeWithChildren('title', contents));
})),
//#endregion
//#region URL
url: r =>
P((input, i) => {
const text = input.substr(i);
const match = text.match(/^https?:\/\/[\w\/:%#@\$&\?!\(\)\[\]~\.,=\+\-]+/);
if (!match) return P.makeFailure(i, 'not a url');
let url = match[0];
url = url.substr(0, getTrailingPosition(url));
if (url.endsWith('.')) url = url.substr(0, url.lastIndexOf('.'));
if (url.endsWith(',')) url = url.substr(0, url.lastIndexOf(','));
return P.makeSuccess(i + url.length, url);
})
.map(x => makeNode('url', { url: x })),
//#endregion
});
export default mfm;