progfay/scrapbox-parser

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

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

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],
    },
);