progfay/scrapbox-parser

import { convertToNodes } from "./index";
import { createNodeParser } from "./creator";
import { createPlainNode } from "./PlainNode";

import type { NodeParser } from "./index";
import type { DecorationNode, PlainNode } from "./type";
import type { NodeCreator } from "./creator";

const decorationRegExp = /\[[!"#%&'()*+,\-./{|}<>_~]+ (?:\[[^[\]]+\]|[^\]])+\]/;

type DecorationChar =
  | "*"
  | "!"
  | '"'
  | "#"
  | "%"
  | "&"
  | "'"
  | "("
  | ")"
  | "+"
  | ","
  | "-"
  | "."
  | "/"
  | "{"
  | "|"
  | "}"
  | "<"
  | ">"
  | "_"
  | "~";

type AsteriskDecorationChar =
  | "*-1"
  | "*-2"
  | "*-3"
  | "*-4"
  | "*-5"
  | "*-6"
  | "*-7"
  | "*-8"
  | "*-9"
  | "*-10";

/**
 * character type of decoration
 */
export type Decoration = Exclude<DecorationChar, "*"> | AsteriskDecorationChar;

const createDecorationNode: NodeCreator<DecorationNode | PlainNode> = (
  raw,
  opts
) => {
  if (opts.context === "table") {
    return createPlainNode(raw, opts);
  }

  const separatorIndex = raw.indexOf(" ");
  const rawDecos = raw.substring(1, separatorIndex);
  const text = raw.substring(separatorIndex + 1, raw.length - 1);

  const decoSet = new Set<string>(rawDecos);
  if (decoSet.has("*")) {
    const asteriskCount = rawDecos.split("*").length - 1;
    decoSet.delete("*");
    decoSet.add(`*-${Math.min(asteriskCount, 10)}` as AsteriskDecorationChar);
  }

  return [
    {
      type: "decoration",
      raw,
      rawDecos,
      decos: Array.from(decoSet) as Decoration[],
      nodes: convertToNodes(text, { ...opts, nested: true }),
    },
  ];
};

export const DecorationNodeParser: NodeParser = createNodeParser(
  createDecorationNode,
  {
    parseOnNested: false,
    parseOnQuoted: true,
    patterns: [decorationRegExp],
  }
);