packages/common/src/utils/makeTheme/scopeMapper.ts

const scopeMap = {
  comment: 'comment',
  punctuation: 'punctuation',
  string: 'string',
  variable: 'variable',
  constant: 'constant',
  header: 'prolog',
  'support.function.magic': 'constant',
  'support.variable': 'constant',
  'entity.name.type.namespace': 'namespace',
  'keyword.operator': 'operator',
  'constant.numeric': 'number',
  'constant.character.numeric': 'number',
  'support.type.vendor.property-name': 'property',
  'support.type.property-name': 'property',
  'meta.property-list': 'property',
  'entity.name.tag': 'tag',
  'entity.name.function': 'function',
  'entity.name.class': 'class-name',
  'entity.name.tag.doctype': 'doctype',
  'meta.selector': 'selector',
  'entity.other.attribute-name': 'attr-name',
  'meta.attribute-selector': 'attr-name',
  'constant.other': 'constant',
  'constant.other.symbol': 'symbol',
  'constant.language.boolean': 'boolean',
  'constant.character': 'char',
  'meta.tag.html': 'tag',
  'meta.tag.js': 'tag',
  'support.function': 'builtin',
  'variable.other.constant': 'builtin',
  'constant.language': 'builtin',
  'keyword.control': 'keyword',
  'keyword.other': 'keyword',
  'variable.parameter.url': 'url',
  'meta.at-rule': 'at-rule',
  'source.css.scss': 'at-rule',
  'markup.inserted': 'inserted',
  'markup.deleted': 'deleted',
  'markup.changed': 'changed',
};

export const mapScope = scope => {
  // If the scope includes a whitespace, it's a specific
  // type that we don't support
  if (scope.includes(' ')) {
    return undefined;
  }

  const scopeAccess = scope.split('.');

  for (let i = scopeAccess.length; i >= 0; i--) {
    const searchScope = scopeAccess.slice(0, i).join('.');
    const outputScope = scopeMap[searchScope];
    if (outputScope !== undefined) {
      return outputScope;
    }
  }

  return undefined;
};