@wordpress/blocks/build-module/api/raw-handling/shortcode-converter.js

Block API for WordPress.

/**
 * WordPress dependencies
 */
import { regexp, next } from '@wordpress/shortcode';

/**
 * Internal dependencies
 */
import { createBlock, getBlockTransforms, findTransform } from '../factory';
import { getBlockType } from '../registration';
import { getBlockAttributes } from '../parser/get-block-attributes';
import { applyBuiltInValidationFixes } from '../parser/apply-built-in-validation-fixes';
const castArray = maybeArray => Array.isArray(maybeArray) ? maybeArray : [maybeArray];
const beforeLineRegexp = /(\n|<p>)\s*$/;
const afterLineRegexp = /^\s*(\n|<\/p>)/;
function segmentHTMLToShortcodeBlock(HTML, lastIndex = 0, excludedBlockNames = []) {
  // Get all matches.
  const transformsFrom = getBlockTransforms('from');
  const transformation = findTransform(transformsFrom, transform => excludedBlockNames.indexOf(transform.blockName) === -1 && transform.type === 'shortcode' && castArray(transform.tag).some(tag => regexp(tag).test(HTML)));
  if (!transformation) {
    return [HTML];
  }
  const transformTags = castArray(transformation.tag);
  const transformTag = transformTags.find(tag => regexp(tag).test(HTML));
  let match;
  const previousIndex = lastIndex;
  if (match = next(transformTag, HTML, lastIndex)) {
    lastIndex = match.index + match.content.length;
    const beforeHTML = HTML.substr(0, match.index);
    const afterHTML = HTML.substr(lastIndex);

    // If the shortcode content does not contain HTML and the shortcode is
    // not on a new line (or in paragraph from Markdown converter),
    // consider the shortcode as inline text, and thus skip conversion for
    // this segment.
    if (!match.shortcode.content?.includes('<') && !(beforeLineRegexp.test(beforeHTML) && afterLineRegexp.test(afterHTML))) {
      return segmentHTMLToShortcodeBlock(HTML, lastIndex);
    }

    // If a transformation's `isMatch` predicate fails for the inbound
    // shortcode, try again by excluding the current block type.
    //
    // This is the only call to `segmentHTMLToShortcodeBlock` that should
    // ever carry over `excludedBlockNames`. Other calls in the module
    // should skip that argument as a way to reset the exclusion state, so
    // that one `isMatch` fail in an HTML fragment doesn't prevent any
    // valid matches in subsequent fragments.
    if (transformation.isMatch && !transformation.isMatch(match.shortcode.attrs)) {
      return segmentHTMLToShortcodeBlock(HTML, previousIndex, [...excludedBlockNames, transformation.blockName]);
    }
    let blocks = [];
    if (typeof transformation.transform === 'function') {
      // Passing all of `match` as second argument is intentionally broad
      // but shouldn't be too relied upon.
      //
      // See: https://github.com/WordPress/gutenberg/pull/3610#discussion_r152546926
      blocks = [].concat(transformation.transform(match.shortcode.attrs, match));

      // Applying the built-in fixes can enhance the attributes with missing content like "className".
      blocks = blocks.map(block => {
        block.originalContent = match.shortcode.content;
        return applyBuiltInValidationFixes(block, getBlockType(block.name));
      });
    } else {
      const attributes = Object.fromEntries(Object.entries(transformation.attributes).filter(([, schema]) => schema.shortcode)
      // Passing all of `match` as second argument is intentionally broad
      // but shouldn't be too relied upon.
      //
      // See: https://github.com/WordPress/gutenberg/pull/3610#discussion_r152546926
      .map(([key, schema]) => [key, schema.shortcode(match.shortcode.attrs, match)]));
      const blockType = getBlockType(transformation.blockName);
      if (!blockType) {
        return [HTML];
      }
      const transformationBlockType = {
        ...blockType,
        attributes: transformation.attributes
      };
      let block = createBlock(transformation.blockName, getBlockAttributes(transformationBlockType, match.shortcode.content, attributes));

      // Applying the built-in fixes can enhance the attributes with missing content like "className".
      block.originalContent = match.shortcode.content;
      block = applyBuiltInValidationFixes(block, transformationBlockType);
      blocks = [block];
    }
    return [...segmentHTMLToShortcodeBlock(beforeHTML.replace(beforeLineRegexp, '')), ...blocks, ...segmentHTMLToShortcodeBlock(afterHTML.replace(afterLineRegexp, ''))];
  }
  return [HTML];
}
export default segmentHTMLToShortcodeBlock;
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