progfay/scrapbox-parser

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

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

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).trimLeft() : "";
  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,
  ],
});