markdownlint/lib/md034.js

// @ts-check

"use strict";

const { addErrorContext } = require("../helpers");
const { filterByPredicate, getHtmlTagInfo, inHtmlFlow, parse } = require("../helpers/micromark.cjs");
const { filterByTypesCached } = require("./cache");

// eslint-disable-next-line jsdoc/valid-types
/** @type import("./markdownlint").Rule */
module.exports = {
  "names": [ "MD034", "no-bare-urls" ],
  "description": "Bare URL used",
  "tags": [ "links", "url" ],
  "parser": "micromark",
  "function": function MD034(params, onError) {
    const literalAutolinks = (tokens) => (
      filterByPredicate(
        tokens,
        (token) => {
          if ((token.type === "literalAutolink") && !inHtmlFlow(token)) {
            // Detect and ignore https://github.com/micromark/micromark/issues/164
            const siblings = token.parent?.children;
            const index = siblings?.indexOf(token);
            // @ts-ignore
            const prev = siblings?.at(index - 1);
            // @ts-ignore
            const next = siblings?.at(index + 1);
            return !(
              prev &&
              next &&
              (prev.type === "data") &&
              (next.type === "data") &&
              prev.text.endsWith("<") &&
              next.text.startsWith(">")
            );
          }
          return false;
        },
        (token) => {
          const { children } = token;
          const result = [];
          for (let i = 0; i < children.length; i++) {
            const current = children[i];
            const openTagInfo = getHtmlTagInfo(current);
            if (openTagInfo && !openTagInfo.close) {
              let count = 1;
              for (let j = i + 1; j < children.length; j++) {
                const candidate = children[j];
                const closeTagInfo = getHtmlTagInfo(candidate);
                if (closeTagInfo && (openTagInfo.name === closeTagInfo.name)) {
                  if (closeTagInfo.close) {
                    count--;
                    if (count === 0) {
                      i = j;
                      break;
                    }
                  } else {
                    count++;
                  }
                }
              }
            } else {
              result.push(current);
            }
          }
          return result;
        }
      )
    );
    const autoLinks = filterByTypesCached([ "literalAutolink" ]);
    if (autoLinks.length > 0) {
      // Re-parse with correct link/image reference definition handling
      const document = params.lines.join("\n");
      const tokens = parse(document, undefined, false);
      for (const token of literalAutolinks(tokens)) {
        const range = [
          token.startColumn,
          token.endColumn - token.startColumn
        ];
        const fixInfo = {
          "editColumn": range[0],
          "deleteCount": range[1],
          "insertText": `<${token.text}>`
        };
        addErrorContext(
          onError,
          token.startLine,
          token.text,
          undefined,
          undefined,
          range,
          fixInfo
        );
      }
    }
  }
};