datahub/packages/remark-wiki-link/src/lib/remarkWikiLink.ts

import { toMarkdown } from "mdast-util-wiki-link";
import { syntax, SyntaxOptions } from "./syntax";
import { fromMarkdown, FromMarkdownOptions } from "./fromMarkdown";

let warningIssued = false;

type RemarkWikiLinkOptions = FromMarkdownOptions & SyntaxOptions;

function remarkWikiLink(opts: RemarkWikiLinkOptions = {}) {
  const data = this.data(); // this is a reference to the processor

  function add(field, value) {
    if (data[field]) data[field].push(value);
    else data[field] = [value];
  }

  if (
    !warningIssued &&
    ((this.Parser &&
      this.Parser.prototype &&
      this.Parser.prototype.blockTokenizers) ||
      (this.Compiler &&
        this.Compiler.prototype &&
        this.Compiler.prototype.visitors))
  ) {
    warningIssued = true;
    console.warn(
      "[remark-wiki-link] Warning: please upgrade to remark 13 to use this plugin"
    );
  }

  // add extensions to packages used by remark-parse
  // micromark extensions
  add("micromarkExtensions", syntax(opts));
  // mdast-util-from-markdown extensions
  add("fromMarkdownExtensions", fromMarkdown(opts));
  // mdast-util-to-markdown extensions
  add("toMarkdownExtensions", toMarkdown(opts));
}

export default remarkWikiLink;
export { remarkWikiLink };