progfay/scrapbox-parser

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

import type { NodeCreator } from "./creator.ts";
import type { ImageNode, PlainNode } from "./type.ts";

const srcFirstStrongImageRegExp =
    /\[https?:\/\/[^\s\]]+\.(?:png|jpe?g|gif|svg)(?:\?[^\]\s]+)?(?:\s+https?:\/\/[^\s\]]+)?\]/i;
const linkFirstStrongImageRegExp =
    /\[https?:\/\/[^\s\]]+\s+https?:\/\/[^\s\]]+\.(?:png|jpe?g|gif|svg)(?:\?[^\]\s]+)?\]/i;
const srcFirstStrongGyazoImageRegExp =
    /\[https?:\/\/(?:[0-9a-z-]+\.)?gyazo\.com\/[0-9a-f]{32}(?:\/raw)?(?:\s+https?:\/\/[^\s\]]+)?\]/;
const linkFirstStrongGyazoImageRegExp =
    /\[https?:\/\/[^\s\]]+\s+https?:\/\/(?:[0-9a-z-]+\.)?gyazo\.com\/[0-9a-f]{32}(?:\/raw)?\]/;

const isImageUrl = (text: string): boolean =>
    /^https?:\/\/[^\s\]]+\.(png|jpe?g|gif|svg)(\?[^\]\s]+)?$/i.test(text) ||
    isGyazoImageUrl(text);

const isGyazoImageUrl = (text: string): boolean =>
    /^https?:\/\/([0-9a-z-]\.)?gyazo\.com\/[0-9a-f]{32}(\/raw)?$/.test(text);

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

    const index = raw.search(/\s/);
    const first =
        index !== -1 ? raw.substring(1, index) : raw.substring(1, raw.length - 1);
    const second =
        index !== -1
            ? raw.substring(index, raw.length - 1).replace(/^\s+/, "")
            : "";
    const [src, link] = isImageUrl(second) ? [second, first] : [first, second];

    return [
        {
            type: "image",
            raw,
            src: /^https?:\/\/([0-9a-z-]\.)?gyazo\.com\/[0-9a-f]{32}$/.test(src)
                ? `${src}/thumb/1000`
                : src,
            link,
        },
    ];
};

export const ImageNodeParser = createNodeParser(createImageNode, {
    parseOnNested: true,
    parseOnQuoted: true,
    patterns: [
        srcFirstStrongImageRegExp,
        linkFirstStrongImageRegExp,
        srcFirstStrongGyazoImageRegExp,
        linkFirstStrongGyazoImageRegExp,
    ],
});